Zinc gluconate evaporation and concentration system and use method thereof

Abstract

The invention discloses a zinc gluconate evaporation and concentration system and a using method thereof, and relates to the technical field of evaporation and concentration equipment. A second outlet of a storage device is connected with a tube pass inlet of an evaporation device through a first pumping device, and the first pumping device is provided with a first electromagnetic heating device and a first temperature monitoring component; a tube pass outlet of the evaporation device is connected with an inlet in the bottom of the electromagnetic heating gas-liquid separation shell through a second pumping device, a second electromagnetic heating device and a second temperature monitoring component are arranged on the second pumping device, and an outlet in the top of the electromagnetic heating gas-liquid separation shell is connected with a shell pass inlet of the evaporation device through a third pipeline. And a fifth electromagnetic heating device and a third temperature monitoring component are arranged on the third pipeline, so that the equipment maintenance and operation cost is reduced, the external energy cost is reduced, the evaporation temperature is reduced, and the problems of high energy consumption in the initial stage and large instantaneous load fluctuation in the preheating stage caused by high steam requirements are solved.

Description

Technical Field

[0001] The invention relates to the technical field of evaporation and concentration equipment, in particular to a zinc gluconate evaporation and concentration system and a use method thereof. Background Art

[0002] Zinc gluconate, as an extremely important trace element supplement, is widely used in clinical medicine. Due to its unique pharmacological functions, zinc gluconate is often used to treat colds, relieve ulcer symptoms, improve taste and appetite, promote growth and development, and enhance the immune system. As a common medical auxiliary drug, it can effectively promote human health and play an important role in the prevention and treatment of various diseases. Therefore, zinc gluconate not only occupies an important position in the pharmaceutical industry, but also has a wide market demand. However, traditional zinc gluconate evaporation equipment has many problems in energy utilization and environmental protection. Existing evaporation equipment usually relies on external fuel or steam supply, which not only leads to a large amount of energy waste, but also aggravates environmental pollution.

[0003] When the material evaporates, the gas-liquid conversion requires a large amount of phase change heat, which causes the material temperature to drop significantly, thus affecting the continuation of the evaporation process. The traditional approach is to raise the temperature of the material to be evaporated to much above the boiling point, and store the required phase change heat in the material. For zinc gluconate solution, since the properties of zinc gluconate solution are similar to those of glucose solution, with high viscosity and heat sensitivity, high temperatures during evaporation and concentration can easily lead to gelatinization and coking, thus affecting the whiteness and qualified rate of the finished zinc gluconate product.

[0004] At present, the evaporation process of mechanical vapor recompression (MVR) is divided into four main stages: preheating, evaporation, separation and secondary steam utilization. The core components of the MVR evaporation system include evaporators, compressors, condensers and heaters. The evaporator is used to strip the water from the liquid to be treated and discharge it in the form of steam; the compressor recompresses the steam and increases the temperature and pressure of the steam by adiabatic compression; finally, the heater provides the heat required for evaporation, so that the entire system can operate efficiently. The compressor is used to pressurize low-quality steam so that it can be used as a heating medium again. This method greatly reduces energy waste and realizes the recycling of steam.

[0005] However, the MVR evaporation system has the following problems: 1. High equipment maintenance and operation costs: The normal operation of the MVR evaporation system requires highly precise control and regular maintenance, especially the maintenance cost of core components such as compressors is relatively expensive. Although the energy consumption of MVR equipment has been reduced compared with traditional evaporation equipment, further optimization is still needed in terms of maintenance and control to reduce operating costs. 2. High external energy cost: MVR equipment relies on external energy to provide driving force during operation, and usually uses steam from the boiler room as the main heat source. 3. High initial energy consumption due to high steam demand: When the equipment is started for the first time or restarted after a long shutdown, a large amount of steam is usually required in the preheating stage, which makes the initial energy consumption high and puts great pressure on the steam supply system. 4. Large instantaneous load fluctuations: During the preheating stage, due to the large instantaneous fluctuations in steam demand, the steam supply system is impacted, which not only requires a complex control and regulation system to balance the load fluctuations, but also puts higher requirements on the design and control of the overall equipment. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a zinc gluconate evaporation and concentration system and a use method thereof, which can avoid overheating during the evaporation and concentration process, improve the whiteness and qualified rate of finished products, reduce equipment maintenance and operation costs, reduce external energy costs, and avoid the problems of high initial energy consumption caused by high steam demand and large instantaneous load fluctuations in the preheating stage.

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides a zinc gluconate evaporation and concentration system, comprising a material storage device, a heat exchange device, an evaporation device, an electromagnetic heating gas-liquid separation device, an exhaust device and a control device, wherein a first outlet of the material storage device is connected to a pipe-side inlet of a heat exchange device, the pipe-side outlet of the heat exchange device is connected to a reflux port on one side of an upper portion of the material storage device through a circulation pumping device, a second outlet of the material storage device is connected to a pipe-side inlet of an evaporation device through a first pumping device, a first electromagnetic heating device and a first temperature monitoring component are provided on the first pumping device, the first temperature monitoring component is used to monitor the temperature of a material heated by the first electromagnetic heating device; the electromagnetic heating gas-liquid separation device The electromagnetic heating gas-liquid separation device comprises an electromagnetic heating gas-liquid separation shell, a fluid guide and a discharge pipe, wherein the fluid guide is arranged in the electromagnetic heating gas-liquid separation shell, the upper end of the fluid guide is open and the lower end is closed, one end of the discharge pipe extends into the fluid guide, and the other end passes through the electromagnetic heating gas-liquid separation shell and extends to the outside, the other end of the discharge pipe is connected to the tube-side inlet of the evaporation device through a reflux pumping device, and the other end of the discharge pipe is connected to the discharge pumping device; the tube-side outlet of the evaporation device is connected to the inlet at the bottom of the electromagnetic heating gas-liquid separation shell through a second pumping device, the second pumping device is provided with a second electromagnetic heating device and a second temperature monitoring component, and the second temperature monitoring component is connected to the discharge pumping device. The temperature monitoring component is used to monitor the temperature of the material after being heated by the second electromagnetic heating device; a third electromagnetic heating device is arranged on the outside of the electromagnetic heating gas-liquid separation shell, a fourth electromagnetic heating device is arranged on the fluid guide, an in-shell temperature monitoring component is arranged in the electromagnetic heating gas-liquid separation shell, the in-shell temperature monitoring component is used to monitor the temperature of the material in the electromagnetic heating gas-liquid separation shell, and a shell temperature monitoring component is arranged on the outside of the electromagnetic heating gas-liquid separation shell; the outlet at the top of the electromagnetic heating gas-liquid separation shell is connected to the shell side inlet of the evaporation device through a third pipeline, and a fifth electromagnetic heating device and a third temperature monitoring component are arranged on the third pipeline. The third temperature monitoring component is used to monitor the temperature of the secondary steam after being heated by the fifth electromagnetic heating device. The shell side outlet of the evaporator is connected to the shell side inlet of the heat exchange device. The shell side outlet of the heat exchange device is connected to the exhaust device. The exhaust device is used to form a negative pressure in the electromagnetic heating gas-liquid separation shell; the first electromagnetic heating device, the second electromagnetic heating device, the third electromagnetic heating device, the fourth electromagnetic heating device, the fifth electromagnetic heating device, the first temperature monitoring component, the second temperature monitoring component, the shell temperature monitoring component, and the third temperature monitoring component are all connected to the control device.

[0009] Preferably, a first shell insulation layer is provided on the outside of the electromagnetic heating gas-liquid separation shell, the third electromagnetic heating device is sleeved on the outside of the first shell insulation layer and corresponds to the setting position of the fluid guide, and the shell temperature monitoring component is provided between the first shell insulation layer and the electromagnetic heating gas-liquid separation shell.

[0010] Preferably, the fluid guide comprises a bottom supporting mechanism, an outer cylinder, an inner cylinder and a top sealing component, the bottom of the outer cylinder is arranged at the bottom of the electromagnetic heating gas-liquid separation shell through the bottom supporting mechanism, the lower parts of the outer cylinder and the inner cylinder are both bowl-shaped structures protruding downward, the upper ends of the outer cylinder and the inner cylinder are both open structures, the inner cylinder is arranged in the outer cylinder, and the upper ends of the outer cylinder and the inner cylinder are connected by the top sealing component, the fourth electromagnetic heating device is arranged on the outer wall of the inner cylinder, a plurality of first vertical protrusions are arranged on the outer wall of the outer cylinder at intervals in the circumferential direction, a plurality of second vertical protrusions are arranged on the inner wall of the inner cylinder at intervals in the circumferential direction, a plurality of convex strips are arranged on the top sealing component at intervals in the circumferential direction, an internal temperature monitoring component is arranged inside the inner cylinder, and the internal temperature monitoring component is used to monitor the temperature of the material in the inner cylinder, an external temperature monitoring component is arranged on the outer wall of the outer cylinder, and both the internal temperature monitoring component and the external temperature monitoring component are connected to the control device.

[0011] Preferably, the evaporation device comprises an evaporation shell, a first baffle, a second baffle, a mist catcher and a distributor. The top and bottom of the evaporation shell are respectively provided with an inlet and an outlet. The inlet and the outlet are respectively the tube-side inlet and the tube-side outlet of the evaporation device. The first pumping device and the reflux pumping device are both connected to the inlet, and the outlet is connected to the second pumping device. The first baffle and the second baffle are sequentially arranged in the evaporation shell from top to bottom, a heating chamber is formed between the first baffle and the second baffle, the mist catcher is arranged in the evaporation shell and is located above the first baffle, the distributor is arranged in the heating chamber, and a nozzle connected to the inlet of the distributor is arranged on the first baffle. a first opening, a second opening connected to the outlet of the distributor is provided on the second baffle, a secondary steam inlet connected to the lower part of the heating chamber is provided on one side of the evaporation shell, the secondary steam inlet is connected to the third pipeline, a steam exhaust port connected to the upper part of the heating chamber is provided on the other side of the evaporation shell, the steam exhaust port is connected to the shell side inlet of the heat exchange device, the secondary steam inlet and the steam exhaust port are respectively the shell side inlet and the shell side outlet of the evaporation device; the feed inlet, the first opening, the interior of the distributor, the second opening and the discharge port are connected in sequence to form the tube side of the evaporation device, and the shell side of the evaporation device is formed between the evaporation shell and the outside of the distributor.

[0012] Preferably, the first pumping device includes a first pipeline and a first pump arranged on the first pipeline, the two ends of the first pipeline are respectively connected to the second outlet of the storage device and the pipe inlet of the evaporation device, the first electromagnetic heating device is arranged on the first pipeline and is located between the first pump and the evaporation device, the first temperature monitoring component is arranged in the first pipeline and is located between the first electromagnetic heating device and the evaporation device, a fourth temperature monitoring component is arranged in the first pipeline, the fourth temperature monitoring component is located between the first electromagnetic heating device and the first pump, and the fourth temperature monitoring component is connected to the control device.

[0013] Preferably, the second pumping device includes a second pipeline and a second pump arranged on the second pipeline, the two ends of the second pipeline are respectively connected to the pipe outlet of the evaporation device and the inlet at the bottom of the electromagnetic heating gas-liquid separation shell, the second electromagnetic heating device is arranged on the second pipeline and is located between the second pump and the electromagnetic heating gas-liquid separation shell, the second temperature monitoring component is arranged in the second pipeline and is located between the second electromagnetic heating device and the electromagnetic heating gas-liquid separation shell, a fifth temperature monitoring component is arranged in the second pipeline, the fifth temperature monitoring component is located between the second electromagnetic heating device and the second pump, and the fifth temperature monitoring component is connected to the control device.

[0014] Preferably, the third temperature monitoring component is arranged in the third pipeline and is located between the fifth electromagnetic heating device and the evaporation device. A sixth temperature monitoring component is arranged in the third pipeline and is located between the fifth electromagnetic heating device and the electromagnetic heating gas-liquid separation shell. The sixth temperature monitoring component is connected to the control device.

[0015] Preferably, the reflux pumping device comprises a reflux pipe and a reflux pump arranged on the reflux pipe, and both ends of the reflux pipe are respectively connected to one end of the discharge pipe extending to the outside and the tube side inlet of the evaporation device.

[0016] Preferably, the discharge pumping device comprises a discharge pipe, and a discharge valve and a discharge pump which are sequentially arranged on the discharge pipe, and one end of the discharge pipe is connected to one end of the discharge pipe extending to the outside.

[0017] The present invention also provides a method for using the zinc gluconate evaporation and concentration system. The operating steps of starting the zinc gluconate evaporation and concentration system after shutdown are as follows:

[0018] Step A1: the circulating pumping device pumps the zinc gluconate solution from the first outlet of the material storage device to the tube side of the heat exchange device, and then flows into the material storage device from the reflux port of the material storage device. In the initial startup, there is no secondary steam in the shell side of the heat exchange device, so no heat exchange occurs; the zinc gluconate solution is pumped from the second outlet of the material storage device to the tube side of the evaporation device through the first pumping device, and the first electromagnetic heating device, the first temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the first pumping device reach the set temperature before entering the evaporation device;

[0019] Step A2: the zinc gluconate solution enters the tube side of the evaporator, and there is no secondary steam in the shell side of the evaporator at the initial start-up, so no heat exchange occurs; then the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device by the second pumping device, and the second electromagnetic heating device heats the zinc gluconate solution. The second electromagnetic heating device, the second temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device, and make the zinc gluconate solution become a gas-liquid mixture;

[0020] Step A3: the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device, and the third electromagnetic heating device and / or the fourth electromagnetic heating device heat the gas-liquid mixture. The third electromagnetic heating device and / or the fourth electromagnetic heating device cooperate with the temperature monitoring component in the shell and the control device to keep the temperature of the internal material of the electromagnetic heating gas-liquid separation shell at a set temperature, thereby ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam;

[0021] Step A4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing, it flows through the top edge of the fluid guide to the interior of the fluid guide;

[0022] Step A5: the secondary steam in the electromagnetic heating gas-liquid separation shell enters the shell side of the evaporation device through the third pipeline, the fifth electromagnetic heating device heats the secondary steam, and the heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device, the third temperature monitoring component and the control device cooperate to make the secondary steam entering the shell side of the evaporation device reach a set temperature; the secondary steam enters the shell side of the heat exchange device after completing heat exchange in the evaporation device, and the waste heat of the secondary steam is utilized in the heat exchange device. The exhaust device extracts the secondary steam in the shell side of the heat exchange device, and forms a negative pressure in the electromagnetic heating gas-liquid separation shell;

[0023] Step A6: the zinc gluconate solution after evaporation and concentration in the fluid guide is transported to the pipe side of the evaporation device through the reflux pumping device for reflux circulation to be evaporated and concentrated again;

[0024] After the zinc gluconate evaporation and concentration system is running stably, the following steps are performed:

[0025] Step B1: the circulating pumping device pumps the zinc gluconate solution from the first outlet of the material storage device to the tube side of the heat exchange device. The shell side of the heat exchange device contains secondary steam flowing out from the evaporation device after completing the heat exchange. The zinc gluconate solution is heated up after the heat exchange with the secondary steam, and then flows into the material storage device from the reflux port of the material storage device. The zinc gluconate solution after preliminary preheating is pumped from the second outlet of the material storage device to the tube side of the evaporation device through the first pumping device. The first electromagnetic heating device, the first temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the first pumping device reach the set temperature before entering the evaporation device. Compared with the initial startup stage, the heating power of the first electromagnetic heating device is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased.

[0026] Step B2: the zinc gluconate solution enters the tube side of the evaporation device, and secondary steam exists in the shell side of the evaporation device. The temperature of the zinc gluconate solution increases after heat exchange with the secondary steam; then the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device by the second pumping device, and the second electromagnetic heating device heats the zinc gluconate solution. The second electromagnetic heating device, the second temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device, and make the zinc gluconate solution become a gas-liquid mixture. Compared with the initial startup stage, the heating power of the second electromagnetic heating device is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased;

[0027] Step B3: the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device, and the third electromagnetic heating device and / or the fourth electromagnetic heating device heat the gas-liquid mixture. The third electromagnetic heating device and / or the fourth electromagnetic heating device cooperate with the temperature monitoring component in the shell and the control device to keep the temperature of the internal material of the electromagnetic heating gas-liquid separation shell at a set temperature, thereby ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam;

[0028] Step B4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing, it flows through the top edge of the fluid guide to the interior of the fluid guide;

[0029] Step B5: the secondary steam in the electromagnetic heating gas-liquid separation shell enters the shell side of the evaporation device through the third pipeline, the fifth electromagnetic heating device heats the secondary steam, and the heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device, the third temperature monitoring component and the control device cooperate to make the secondary steam entering the shell side of the evaporation device reach a set temperature; the secondary steam enters the shell side of the heat exchange device after completing heat exchange in the evaporation device, and the waste heat of the secondary steam is utilized in the heat exchange device. The exhaust device extracts the secondary steam in the shell side of the heat exchange device, and forms a negative pressure in the electromagnetic heating gas-liquid separation shell;

[0030] Step B6: the zinc gluconate solution after evaporation and concentration in the fluid guide is transported to the pipe side of the evaporation device through the reflux pumping device for reflux circulation to be evaporated and concentrated again; when the concentration of the zinc gluconate solution after evaporation and concentration in the fluid guide reaches a set value, the reflux pumping device is closed, and the discharge pumping device is opened to discharge the zinc gluconate solution after evaporation and concentration.

[0031] Compared with the prior art, the present invention has achieved the following technical effects:

[0032] The zinc gluconate evaporation and concentration system of the present invention comprises a material storage device, a heat exchange device, an evaporation device, an electromagnetic heating gas-liquid separation device, an exhaust device and a control device, wherein a first outlet of the material storage device is connected to a pipe-side inlet of the heat exchange device, the pipe-side outlet of the heat exchange device is connected to a reflux port on one side of an upper part of the material storage device through a circulation pumping device, a second outlet of the material storage device is connected to a pipe-side inlet of the evaporation device through a first pumping device, a first electromagnetic heating device and a first temperature monitoring component are arranged on the first pumping device, a pipe-side outlet of the evaporation device is connected to an inlet at the bottom of an electromagnetic heating gas-liquid separation housing through a second pumping device, and a second electromagnetic heating device is arranged on the second pumping device. The outlet on the top of the electromagnetic heating gas-liquid separation shell is connected to the shell side inlet of the evaporation device through the third pipeline. The third pipeline is provided with a fifth electromagnetic heating device and a third temperature monitoring component. The fifth electromagnetic heating device, the third temperature monitoring component and the control device cooperate to make the secondary steam entering the shell side of the evaporation device reach the set temperature. After electromagnetic heating, the temperature of the secondary steam is increased, and the energy loss is compensated. The temperature of the secondary steam can be accurately controlled. The heated secondary steam can meet the requirements of the subsequent process for steam temperature and energy, improve the utilization rate of the secondary steam, and get rid of the dependence on external steam. Compared with the MVR evaporation system using a compressor, it reduces the equipment maintenance and operation costs. Compared with the method of providing steam as the main heat source in the boiler room, it reduces the external energy cost and avoids the problems of high initial energy consumption caused by high steam demand and large instantaneous load fluctuations in the preheating stage.

[0033] In the present invention, the fluid guide forms a forced circulation for the material inside the electromagnetic heating gas-liquid separation shell, thereby improving the gas-liquid separation effect. The fourth electromagnetic heating device on the fluid guide and the third electromagnetic heating device outside the electromagnetic heating gas-liquid separation shell can continuously supplement heat for the material to maintain continuous gas-liquid separation. In the present invention, all heating locations adopt electromagnetic heating methods, and with multiple temperature monitoring components and control devices, accurate control of material temperature can be achieved, thereby avoiding the occurrence of local overheating in traditional steam heating methods. By setting an exhaust device, negative pressure can be formed inside the electromagnetic heating gas-liquid separation shell, thereby reducing the boiling point of the zinc gluconate solution. Compared with normal pressure, the boiling evaporation of the zinc gluconate solution can be achieved at a lower temperature, thereby reducing the evaporation temperature, thereby avoiding the gelatinization, coking and discoloration of zinc gluconate due to excessive heating temperature. For the high viscosity and heat sensitivity of the zinc gluconate solution, these measures can effectively improve the whiteness and qualified rate of the zinc gluconate finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of the zinc gluconate evaporation and concentration system provided by the present invention;

[0036] Figure 2 A schematic diagram of the structure of an evaporation device, a first pumping device and a third pipeline in the zinc gluconate evaporation and concentration system provided by the present invention;

[0037] Figure 3 A schematic diagram of the structure of the electromagnetic heating gas-liquid separation device and the second pipeline in the zinc gluconate evaporation and concentration system provided by the present invention;

[0038] Figure 4 A schematic diagram of the structure of an electromagnetic heating gas-liquid separation device in the zinc gluconate evaporation and concentration system provided by the present invention;

[0039] Figure 5 A three-dimensional structural diagram of a fluid guide in the zinc gluconate evaporation and concentration system provided by the present invention;

[0040] Figure 6 A front view of a fluid guide in the zinc gluconate evaporation and concentration system provided by the present invention;

[0041] Figure 7 This is a top view of the fluid guide in the zinc gluconate evaporation and concentration system provided by the present invention with the top sealing component removed.

[0042] Description of the reference numerals: 1. material storage device; 2. heat exchange device; 3. air extraction device; 4. evaporation device; 41. evaporation shell; 42. material inlet; 43. material outlet; 44. mist collector; 45. first partition; 46. second partition; 47. heating chamber; 48. distributor; 49. secondary steam inlet; 410. steam outlet; 5. electromagnetic heating gas-liquid separation device; 51. electromagnetic heating gas-liquid separation shell; 52. first shell insulation layer; 53. gas-liquid mixing inlet; 54. secondary steam Steam outlet; 55, support block; 56, fluid guide; 561, outer tube; 562, inner tube; 563, top sealing component; 564, first vertical protrusion; 565, second vertical protrusion; 566, convex strip; 57, discharge pipe; 58, third electromagnetic heating device; 59, third electromagnetic heating controller; 510, fourth electromagnetic heating device; 511, fourth electromagnetic heating controller; 512, shell temperature monitoring component; 513, shell temperature monitoring component; 514, internal temperature monitoring 15, external temperature monitoring component; 6, first pipeline; 7, first pump; 8, first electromagnetic heating device; 9, second pipeline; 10, second pump; 11, second electromagnetic heating device; 12, third pipeline; 13, fifth electromagnetic heating device; 14, first temperature monitoring component; 15, second temperature monitoring component; 16, third temperature monitoring component; 17, fourth temperature monitoring component; 18, fifth temperature monitoring component; 19, sixth temperature monitoring component; 20, first electromagnetic heating device Controller; 21. Second electromagnetic heating controller; 22. Fifth electromagnetic heating controller; 23. First circulation pipe; 24. Second circulation pipe; 25. Circulation pump; 26. Reflux pipe; 27. Reflux pump; 28. Discharge pipe; 29. ​​Discharge valve; 30. Discharge pump; 31. First valve; 32. Second valve; 33. Feed pipe; 34. Feed valve; 35. Third valve, 36. First connecting pipe; 37. Second connecting pipe; 38. First outlet; 39. Second outlet; 40. Reflux port. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The invention aims to provide a zinc gluconate evaporation and concentration system and a method for using the same, so as to avoid overheating during the evaporation and concentration process, improve the whiteness and qualified rate of finished products, reduce equipment maintenance and operation costs, reduce external energy costs, and avoid the problems of high initial energy consumption caused by high steam demand and large instantaneous load fluctuations in the preheating stage.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1-Figure 7 As shown, this embodiment provides a zinc gluconate evaporation and concentration system, including a storage device 1, a heat exchange device 2, an evaporation device 4, an electromagnetic heating gas-liquid separation device 5, an exhaust device 3 and a control device, the first outlet 38 of the storage device 1 is connected to the pipe-side inlet of the heat exchange device 2, the pipe-side outlet of the heat exchange device 2 is connected to the reflux port 40 on one side of the upper part of the storage device 1 through a circulating pumping device, the second outlet 39 of the storage device 1 is connected to the pipe-side inlet of the evaporation device 4 through a first pumping device, the first pumping device is provided with a first electromagnetic heating device 8 and a first temperature monitoring component 14, the first temperature monitoring component 14 is used to monitor the temperature of the material after being heated by the first electromagnetic heating device 8.

[0047] The electromagnetic heating gas-liquid separation device 5 includes an electromagnetic heating gas-liquid separation shell 51, a fluid guide 56 and a discharge pipe 57. The fluid guide 56 is arranged in the electromagnetic heating gas-liquid separation shell 51. The upper end of the fluid guide 56 is open and the lower end is closed. One end of the discharge pipe 57 extends into the fluid guide 56, and the other end passes through the electromagnetic heating gas-liquid separation shell 51 and extends to the outside. The other end of the discharge pipe 57 is connected to the pipe side inlet of the evaporation device 4 through a reflux pumping device, and the other end of the discharge pipe 57 is connected to the discharge pumping device.

[0048] The tube outlet of the evaporation device 4 is connected to the inlet at the bottom of the electromagnetic heating gas-liquid separation shell 51 through the second pumping device. The second pumping device is provided with a second electromagnetic heating device 11 and a second temperature monitoring component 15. The second temperature monitoring component 15 is used to monitor the temperature of the material after being heated by the second electromagnetic heating device 11. The electromagnetic heating gas-liquid separation shell 51 is provided with a third electromagnetic heating device 58 outside the electromagnetic heating gas-liquid separation shell 51, and a fourth electromagnetic heating device 510 is provided on the fluid guide 56. The electromagnetic heating gas-liquid separation shell 51 is provided with an internal shell temperature monitoring component 512. The internal shell temperature monitoring component 512 is used to monitor the electromagnetic heating gas-liquid separation shell 51. In order to monitor the temperature of the material in the electromagnetic heating gas-liquid separation shell 5, a shell temperature monitoring component 513 is arranged on the outside of the electromagnetic heating gas-liquid separation shell 5; the outlet at the top of the electromagnetic heating gas-liquid separation shell 51 is connected with the shell side inlet of the evaporation device 4 through the third pipeline 12, and the third pipeline 12 is provided with a fifth electromagnetic heating device 13 and a third temperature monitoring component 16, and the third temperature monitoring component 16 is used to monitor the temperature of the secondary steam heated by the fifth electromagnetic heating device 13, the shell side outlet of the evaporation device 4 is connected with the shell side inlet of the heat exchange device 2, and the shell side outlet of the heat exchange device 2 is connected with the exhaust device 3, and the exhaust device 3 is used to form a negative pressure in the electromagnetic heating gas-liquid separation shell 51.

[0049] The first electromagnetic heating device 8, the second electromagnetic heating device 11, the third electromagnetic heating device 58, the fourth electromagnetic heating device 510, the fifth electromagnetic heating device 13, the first temperature monitoring component 14, the second temperature monitoring component 15, the shell temperature monitoring component 512, the shell temperature monitoring component 513 and the third temperature monitoring component 16 are all connected to the control device.

[0050] In this embodiment, the temperature of the secondary steam is increased after electromagnetic heating, and the energy loss is compensated, so that the temperature of the secondary steam can be accurately controlled. The heated secondary steam can meet the requirements of the subsequent process for steam temperature and energy, improve the utilization rate of the secondary steam, and get rid of the dependence on external steam. Compared with the MVR evaporation system using a compressor, it reduces the equipment maintenance and operation costs. Compared with the method of providing steam as the main heat source in the boiler room, it reduces the external energy cost and avoids the problems of high initial energy consumption caused by high steam demand and large instantaneous load fluctuations in the preheating stage. The scheme of electromagnetic heating of secondary steam in this embodiment can improve energy efficiency, reduce costs, stabilize operation and reduce emissions. Through reasonable design and optimized operation, the overall performance and economic benefits of the evaporation concentration system can be significantly improved, while reducing the negative impact on the environment.

[0051] In this embodiment, the fluid guide 56 forms a forced circulation for the material inside the electromagnetic heating gas-liquid separation shell 51, thereby improving the gas-liquid separation effect. The fourth electromagnetic heating device 59 on the fluid guide 56 and the third electromagnetic heating device 58 outside the electromagnetic heating gas-liquid separation shell 51 can continuously supplement heat for the material to maintain continuous gas-liquid separation. In this embodiment, all heating locations adopt electromagnetic heating methods, and with multiple temperature monitoring components and control devices, accurate control of material temperature can be achieved, avoiding the occurrence of local overheating in traditional steam heating methods. By setting the exhaust device 3, negative pressure can be formed inside the electromagnetic heating gas-liquid separation shell 51, thereby reducing the boiling point of the zinc gluconate solution. Compared with normal pressure, the boiling and evaporation of the zinc gluconate solution can be achieved at a lower temperature, thereby avoiding the gelatinization, coking and discoloration of zinc gluconate caused by excessive heating temperature. For the high viscosity and heat sensitivity of the zinc gluconate solution, these measures can effectively improve the whiteness and qualified rate of the zinc gluconate finished product.

[0052] Specifically, the first outlet 38 of the storage device 1 is located at the bottom of the storage device 1, and the first outlet 38 of the storage device 1 is connected to the pipe inlet of the heat exchange device 2 through the first circulation pipe 23, and the first circulation pipe 23 is provided with a first valve 31. The storage device 1 in this embodiment is a storage tank.

[0053] The circulation pumping device includes a second circulation pipe 24 and a circulation pump 25 arranged on the second circulation pipe. The two ends of the second circulation pipe 24 are respectively connected to the pipe outlet of the heat exchange device 2 and the reflux port 40 of the storage device 1. The second circulation pipe 24 is provided with a second valve 32.

[0054] A feed pipe 33 is provided on one side of the upper part of the storage device 1 , and a feed valve 34 is provided on the feed pipe 33 . The feed pipe is used to transport the zinc gluconate solution into the storage device 1 .

[0055] Specifically, the heat exchange device 2 is arranged horizontally, the shell side outlet of the evaporation device 4 is connected to the shell side inlet of the heat exchange device 2 through the first connecting pipe 36, and the shell side outlet of the heat exchange device 2 is connected to the exhaust device 3 through the second connecting pipe 37. The heat exchange device 2 in this embodiment is a heat exchanger, and the exhaust device 3 is a vacuum pump and its accessories.

[0056] like Figure 2 As shown, the evaporation device 4 includes an evaporation shell 41, a first baffle 45, a second baffle 46, a mist catcher 44 and a distributor 48. The top and bottom of the evaporation shell 41 are respectively provided with an inlet 42 and an outlet 43. The inlet 42 and the outlet 43 are respectively the tube-side inlet and the tube-side outlet of the evaporation device 4. The first pumping device and the reflux pumping device are both connected to the inlet 42, and the outlet 43 is connected to the second pumping device. The evaporation shell 41 is sequentially provided with a first baffle 45 and a second baffle 46 from top to bottom, and a heating chamber 47 is formed between the first baffle 45 and the second baffle 46. The mist catcher 44 is arranged in the evaporation shell 41 and is located at the first baffle. 45, a distributor 48 is arranged in the heating chamber 47, a first opening connected to the inlet of the distributor 48 is arranged on the first partition 45, a second opening connected to the outlet of the distributor 48 is arranged on the second partition 46, a secondary steam inlet 49 connected to the lower part of the heating chamber 47 is arranged on one side of the evaporation shell 41, and the secondary steam inlet 49 is connected to the third pipeline 12, and a steam outlet 410 connected to the upper part of the heating chamber 47 is arranged on the other side of the evaporation shell 41, and the steam outlet 410 is connected to the shell side inlet of the heat exchange device 2, and the secondary steam inlet 49 and the steam outlet 410 are respectively the shell side inlet and shell side outlet of the evaporation device 4. The feed inlet 42, the first opening, the inside of the distributor 48, the second opening and the discharge port 43 are connected in sequence to form the tube side of the evaporation device 4, and the shell side of the evaporation device 4 is formed between the evaporation shell 41 and the outside of the distributor 48.

[0057] Specifically, the steam outlet 410 is connected to the shell-side inlet of the heat exchange device 2 through the first connecting pipe 36. A second shell insulation layer is disposed outside the evaporation shell 41 of this embodiment.

[0058] The distributor 48 in this embodiment is a tube bundle structure, and the distributor 48 includes a plurality of heat exchange tubes. A plurality of first openings are provided on the first partition 45, and a plurality of second openings are provided on the second partition 46. The upper and lower ends of each heat exchange tube are respectively connected to a first opening and a second opening. The material enters the interior of the heat exchange tube from the first opening on the first partition 45, and enters the bottom of the evaporation shell 41 from the bottom of the heat exchange tube and the second opening on the second partition 46, and is transported to the second pipeline 9 from the discharge port 43.

[0059] The first pumping device includes a first pipeline 6 and a first pump 7 disposed on the first pipeline 6. The two ends of the first pipeline 6 are respectively connected to the second outlet 39 of the material storage device 1 and the pipe inlet of the evaporation device 4. In this embodiment, the two ends of the first pipeline 6 are respectively connected to the second outlet 39 of the material storage device 1 and the feed inlet 42 at the top of the evaporation shell 41. The first pipeline 6 is provided with a third valve 35. The first electromagnetic heating device 8 is disposed on the first pipeline 6 and is located between the first pump 7 and the evaporation device 4. The first temperature monitoring component 14 is disposed in the first pipeline 6 and is located between the first electromagnetic heating device 8 and the evaporation device 4. The first pipeline 6 is provided with a fourth temperature monitoring component 17. The fourth temperature monitoring component 17 is located between the first electromagnetic heating device 8 and the first pump 7. The fourth temperature monitoring component 17 is connected to the control device.

[0060] Specifically, the fourth temperature monitoring component 17 and the first temperature monitoring component 14 respectively monitor the temperature of the material before and after heating by the first electromagnetic heating device 8 in the first pipeline 6. At the same time, the temperature of the material heated by the first electromagnetic heating device 8 is set in the control device, and the temperature of the material heated by the first electromagnetic heating device 8 reaches the set value by controlling the first electromagnetic heating device 8. The electromagnetic heating technology in the preheating stage can achieve efficient and rapid heating and significantly shorten the preheating time of the liquid feed. In actual production, real-time temperature monitoring and automatic control can be used to achieve precise temperature regulation during the preheating process to avoid overheating or insufficient heating.

[0061] The second pumping device includes a second pipeline 9 and a second pump 10 arranged on the second pipeline 9. The two ends of the second pipeline 9 are respectively connected to the pipe outlet of the evaporation device 4 and the inlet at the bottom of the electromagnetic heating gas-liquid separation shell 51. The second electromagnetic heating device 11 is arranged on the second pipeline 9 and is located between the second pump 10 and the electromagnetic heating gas-liquid separation shell 51. The second temperature monitoring component 15 is arranged in the second pipeline 9 and is located between the second electromagnetic heating device 11 and the electromagnetic heating gas-liquid separation shell 51. A fifth temperature monitoring component 18 is arranged in the second pipeline 9. The fifth temperature monitoring component 18 is located between the second electromagnetic heating device 11 and the second pump 10. The fifth temperature monitoring component 18 is connected to the control device.

[0062] Specifically, the fifth temperature monitoring component 18 and the second temperature monitoring component 15 respectively monitor the temperature of the material before and after heating by the second electromagnetic heating device 11 in the second pipeline 9. At the same time, the temperature of the material heated by the second electromagnetic heating device 11 is set in the control device, and the second electromagnetic heating device 11 is controlled so that the temperature of the material heated by the second electromagnetic heating device 11 reaches the set value.

[0063] The third temperature monitoring component 16 is arranged in the third pipeline 12 and is located between the fifth electromagnetic heating device 13 and the evaporation device 4. The sixth temperature monitoring component 19 is arranged in the third pipeline 12. The sixth temperature monitoring component 19 is located between the fifth electromagnetic heating device 13 and the electromagnetic heating gas-liquid separation shell 51. The sixth temperature monitoring component 19 is connected to the control device.

[0064] Specifically, the sixth temperature monitoring component 19 and the third temperature monitoring component 16 respectively monitor the temperature of the material before and after heating by the fifth electromagnetic heating device 13 in the third pipeline 12. At the same time, the temperature of the material heated by the fifth electromagnetic heating device 13 is set in the control device, and the fifth electromagnetic heating device 13 is controlled so that the temperature of the material heated by the fifth electromagnetic heating device 13 reaches the set value.

[0065] In this embodiment, the inlet at the bottom and the outlet at the top of the electromagnetic heating gas-liquid separation shell 51 are respectively the gas-liquid mixing inlet 53 and the secondary steam outlet 54, the two ends of the second pipeline 9 are respectively connected to the discharge port 43 at the bottom of the evaporation shell 41 and the gas-liquid mixing inlet 53 at the bottom of the electromagnetic heating gas-liquid separation shell 51, and the two ends of the third pipeline 12 are respectively connected to the secondary steam outlet 54 and the secondary steam inlet 49.

[0066] The reflux pumping device includes a reflux pipe 26 and a reflux pump 27 disposed on the reflux pipe 26. The two ends of the reflux pipe 26 are respectively connected to one end of the discharge pipe 57 extending to the outside and the pipe inlet of the evaporation device 4. Specifically, one end of the reflux pipe 26 away from the discharge pipe 57 is connected to one end of the first pipeline 6 close to the evaporation device 4.

[0067] The discharge pumping device includes a discharge pipe 28 and a discharge valve 29 and a discharge pump 30 which are sequentially arranged on the discharge pipe 28 . One end of the discharge pipe 28 is connected to one end of the discharge pipe 57 extending to the outside.

[0068] Specifically, the electromagnetic heating gas-liquid separation device 5 has three heating modes: the first is to only turn on the third electromagnetic heating device 58 outside the electromagnetic heating gas-liquid separation shell 51, the second is to only turn on the fourth electromagnetic heating device 510 on the fluid guide 56, and the third is to simultaneously turn on the third electromagnetic heating device 58 outside the electromagnetic heating gas-liquid separation shell 51 and the fourth electromagnetic heating device 510 on the fluid guide 56.

[0069] like Figure 3 and Figure 4 As shown, the outside of the electromagnetic heating gas-liquid separation shell 51 is provided with a first shell insulation layer 52, and the third electromagnetic heating device 58 is sleeved on the outside of the first shell insulation layer 52 and corresponds to the setting position of the fluid guide 56. Specifically, the position of the top of the third electromagnetic heating device 58 is flush with the position of the top of the fluid guide 56, or the position of the top of the third electromagnetic heating device 58 is slightly higher than the position of the top of the fluid guide 56. A shell temperature monitoring component 513 is provided between the first shell insulation layer 52 and the electromagnetic heating gas-liquid separation shell 51. The shell temperature monitoring component 513 is used to measure the external wall temperature of the electromagnetic heating gas-liquid separation shell 51, and the shell temperature monitoring component 513 is connected to the control device.

[0070] The third electromagnetic heating device 58 is provided to ensure a good gas-liquid separation effect, thereby further heating the steam and evaporating the liquid during the gas-liquid separation process. Compared with the traditional gas-liquid separator, the efficiency of gas-liquid separation is greatly improved, and the liquid can be further evaporated and concentrated.

[0071] like Figure 4-Figure 7 As shown, the fluid guide 56 includes a bottom supporting mechanism, an outer cylinder 561, an inner cylinder 562 and a top sealing component 563. The bottom of the outer cylinder 561 is arranged at the bottom of the electromagnetic heating gas-liquid separation shell 51 through the bottom supporting mechanism. The lower parts of the outer cylinder 561 and the inner cylinder 562 are both bowl-shaped structures protruding downward. The upper ends of the outer cylinder 561 and the inner cylinder 562 are both open structures. The inner cylinder 562 is arranged in the outer cylinder 561. The upper ends of the outer cylinder 561 and the inner cylinder 562 are connected by the top sealing component 563. The fourth electromagnetic heating device 510 is arranged on the outer wall of the inner cylinder 562. A plurality of first vertical protrusions 564 are arranged on the outer wall of the outer cylinder 561 at intervals in the circumferential direction to form a plurality of first vertical grooves arranged in intervals in the circumferential direction. A plurality of second vertical protrusions 565 are arranged on the inner wall of the inner cylinder 562 at intervals in the circumferential direction to form a plurality of second vertical grooves arranged in intervals in the circumferential direction. An internal temperature monitoring component 514 is arranged inside the inner cylinder 562, and the internal temperature monitoring component 514 is used to detect the temperature of the material in the inner cylinder 562. An external temperature monitoring component 515 is arranged on the outer wall of the outer cylinder 561, and the external temperature monitoring component 515 is used to detect the external wall temperature of the outer cylinder 561. Both the internal temperature monitoring component 514 and the external temperature monitoring component 515 are connected to the control device.

[0072] The first vertical protrusion 564 on the outer wall of the outer cylinder 561 of the fluid guide 56 and the second vertical protrusion 565 on the inner wall of the inner cylinder 562 can increase the effective heat transfer area and also have a guiding effect. By setting the fourth electromagnetic heating device 510, when the gas and liquid enter the electromagnetic heating gas-liquid separation device 5, the liquid can not only be heated and evaporated outside the outer cylinder 561 of the fluid guide 56, but also can be further heated and evaporated when the liquid flows into the inner cylinder 562 of the fluid guide 56, thereby increasing the evaporation efficiency and saving time.

[0073] The bottom support mechanism in this embodiment includes four support blocks 55 fixed to the bottom of the electromagnetic heating gas-liquid separation shell 51 , and the outer cylinder 561 is placed on the four support blocks 55 , thereby achieving stable support for the fluid guide 56 .

[0074] In this embodiment, a plurality of convex strips 566 are arranged in sequence along the circumferential direction on the top sealing member 563 to form a plurality of connecting grooves arranged in sequence along the circumferential direction. Specifically, each convex strip 566 corresponds to a first vertical protrusion 564 and a second vertical protrusion 565, so that each connecting groove corresponds to a first vertical groove and a second vertical groove, and both ends of each connecting groove are respectively connected to a first vertical groove and a second vertical groove. In this embodiment, the top sealing member 563 is a top sealing ring. The convex strips 566 on the top sealing member 563 have a cutting and combing effect on the fluid, which is conducive to gas escape and gas-liquid separation.

[0075] In this specific embodiment, the first vertical protrusion 564 is an outwardly protruding curved surface structure, and the first vertical groove is an inwardly protruding curved surface structure, that is, the cross section of the outer wall of the outer cylinder 561 is a corrugated structure. The second vertical protrusion 565 is an inwardly protruding curved surface structure, and the second vertical groove is an outwardly protruding curved surface structure, that is, the cross section of the inner wall of the inner cylinder 562 is a corrugated structure. The convex strip 566 is an upwardly protruding curved surface structure, and the connecting groove is a downwardly protruding curved surface structure. Specifically, the first vertical protrusion 564 and the second vertical protrusion 565 are in the shape of a semi-cylindrical strip.

[0076] The control device in this embodiment includes a first electromagnetic heating controller 20, a second electromagnetic heating controller 21, a third electromagnetic heating controller 59, a fourth electromagnetic heating controller 511 and a fifth electromagnetic heating controller 22. The first electromagnetic heating device 8, the first temperature monitoring component 14 and the fourth temperature monitoring component 17 are all connected to the first electromagnetic heating controller 20, the second electromagnetic heating device 11, the second temperature monitoring component 15 and the fifth temperature monitoring component 18 are all connected to the second electromagnetic heating controller 21, the third electromagnetic heating device 58, the shell temperature monitoring component 512 and the shell temperature monitoring component 513 are all connected to the third electromagnetic heating controller 59, the fourth electromagnetic heating device 510, the internal temperature monitoring component 514 and the external temperature monitoring component 515 are all connected to the fourth electromagnetic heating controller 511, and the fifth electromagnetic heating device 13, the third temperature monitoring component 16 and the sixth temperature monitoring component 19 are all connected to the fifth electromagnetic heating controller 22.

[0077] In this specific embodiment, the outer walls of the first pipeline 6, the second pipeline 9, the third pipeline 12, the first circulation pipe 23, the second circulation pipe 24, the first connecting pipe 36, the second connecting pipe 37, the return pipe 26 and the discharge pipe 28 are all provided with a pipe body insulation layer. The first electromagnetic heating device 8 is a first electromagnetic heating coil, which is wound around the outside of the pipe body insulation layer of the first pipeline 6. The second electromagnetic heating device 11 is a second electromagnetic heating coil, which is wound around the outside of the pipe body insulation layer of the second pipeline 9. The third electromagnetic heating device 58 is a third electromagnetic heating coil, which is wound around the outside of the first shell insulation layer 52. The fourth electromagnetic heating device 510 is a fourth electromagnetic heating coil, which is wound around the outer wall of the inner cylinder 562. The fifth electromagnetic heating device 13 is a fifth electromagnetic heating coil, which is wound around the outside of the pipe body insulation layer of the third pipeline 12.

[0078] In this embodiment, the first pipeline 6, the second pipeline 9, the third pipeline 12, the first circulation pipe 23, the second circulation pipe 24, the first connecting pipe 36, the second connecting pipe 37, the reflux pipe 26 and the discharge pipe 28 are all metal pipes, specifically, 430 stainless steel, and the pipe wall thickness is 3mm to 10mm. 430 stainless steel is an iron-chromium alloy stainless steel, which has excellent high temperature resistance and magnetic conductivity, can maintain good structural stability under high temperature conditions, and withstand the action of high temperature steam without deformation or damage, thereby ensuring the safety and durability of the equipment operation.

[0079] The pipe insulation layer in this embodiment is made of aluminum silicate insulation material, and the thickness of the pipe insulation layer is 10 mm. Aluminum silicate insulation material has excellent thermal insulation performance, high temperature resistance and corrosion resistance, and is environmentally friendly and lightweight, easy to install, has good wear resistance and pressure resistance, can effectively reduce heat loss, and improve the overall energy efficiency of the system.

[0080] In this embodiment, the first electromagnetic heating coil, the second electromagnetic heating coil, the third electromagnetic heating coil, the fourth electromagnetic heating coil and the fifth electromagnetic heating coil are all made of TU1 oxygen-free copper. The purity of TU1 oxygen-free copper is usually greater than 99.97%, and it has excellent electrical conductivity and thermal conductivity, which can significantly improve the efficiency of electromagnetic heating and reduce energy loss.

[0081] In this specific embodiment, the first temperature monitoring component 14, the second temperature monitoring component 15, the third temperature monitoring component 16, the fourth temperature monitoring component 17, the fifth temperature monitoring component 18, the sixth temperature monitoring component 19, the shell temperature monitoring component 512, the shell temperature monitoring component 513, the internal temperature monitoring component 514 and the external temperature monitoring component 515 are all temperature sensors.

[0082] In this embodiment, the first valve 31, the second valve 32, the third valve 35, the feed valve 34, the sampling valve and the discharge valve 29 are all manual valves or electrically controlled valves, and the first pump 7, the second pump 10, the reflux pump 27, the discharge pump 30 and the circulation pump 25 can all be manually controlled or controlled by a controller.

[0083] In this specific embodiment, the feed rate of zinc gluconate solution is 4725 kg / h, the initial solution concentration is 22% (w / w), and the materials are all vacuumed.

[0084] This embodiment also provides a method for using the zinc gluconate evaporation and concentration system. The operating steps for starting the zinc gluconate evaporation and concentration system after shutdown are as follows:

[0085] Step A1: The circulating pumping device pumps the zinc gluconate solution from the first outlet 38 of the storage device 1 to the tube side of the heat exchange device 2, and then flows into the storage device 1 from the reflux port 40 of the storage device 1. In the initial startup, there is no secondary steam in the shell side of the heat exchange device 2, so no heat exchange occurs; the zinc gluconate solution is pumped from the second outlet 39 of the storage device 1 to the tube side of the evaporation device 4 through the first pumping device, and the zinc gluconate solution transported by the first pumping device reaches the set temperature before entering the evaporation device 4 through the cooperation of the first electromagnetic heating device 8, the first temperature monitoring component 14 and the control device.

[0086] Specifically, the temperature value is obtained by the fourth temperature monitoring component 17 and the first temperature monitoring component 14, and transmitted to the first electromagnetic heating controller 20. Preferably, by controlling the electromagnetic heating power and temperature of the first electromagnetic heating device 8, it is ensured that the zinc gluconate solution is preheated to 75°C to 77°C for the first time after startup, which is close to its boiling point under negative pressure.

[0087] Step A2: The zinc gluconate solution enters the tube side of the evaporator 4. In the initial startup, there is no secondary steam in the shell side of the evaporator 4, so no heat exchange occurs. Then, the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device 5 by the second pumping device. The second electromagnetic heating device 11 heats the zinc gluconate solution. The second electromagnetic heating device 11, the second temperature monitoring component 15 and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device 5, and make the zinc gluconate solution become a gas-liquid mixture.

[0088] Specifically, the mist is captured in the evaporation device 4 to remove the foam. As the temperature of the zinc gluconate solution increases, tiny foam is generated, and the solution enters the mist collector 44 from the feed port 42 of the evaporation device 4. The mist collector 44 is used to remove tiny foam in the solution to improve the gas-liquid separation efficiency.

[0089] The second electromagnetic heating device 11 on the second pipeline 9 is started, and the temperature value is obtained through the fifth temperature monitoring component 18 and the second temperature monitoring component 15, and transmitted to the second electromagnetic heating controller 21. The second electromagnetic heating device 11 further heats the solution to the boiling point. Preferably, the evaporation temperature of the material is controlled to be 78°C to 80°C.

[0090] Step A3: The gas-liquid mixture enters the electromagnetic heating gas-liquid separation device 5, and the third electromagnetic heating device 58 and / or the fourth electromagnetic heating device 59 heat the gas-liquid mixture. The third electromagnetic heating device 58 and / or the fourth electromagnetic heating device 59 cooperate with the temperature monitoring component 512 and the control device in the shell, so that the temperature of the internal material of the electromagnetic heating gas-liquid separation shell 51 is maintained at the set temperature, ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam.

[0091] Specifically, the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device 5, and the third electromagnetic heating device 58 and the fourth electromagnetic heating device 510 are started at the same time, and the temperature of the material inside the electromagnetic heating gas-liquid separation shell 51 is monitored by the shell temperature monitoring component 512. Preferably, the temperature of the material inside the electromagnetic heating gas-liquid separation shell 51 is maintained at 78°C to 80°C to ensure that the zinc gluconate solution continues to boil and evaporate to generate steam.

[0092] Step A4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing 51 , it flows through the top edge of the fluid guide 56 to the inside of the fluid guide 56 .

[0093] Specifically, the gas-liquid mixture flows along the first vertical groove on the fluid guide 56, and the gas-liquid separation is completed when the solution flows to the top sealing component 563. Further, the inner cylinder 562 is provided with a second vertical protrusion 565 to enhance the heat transfer effect, so that the zinc gluconate solution is further heated and evaporated.

[0094] Step A5: The secondary steam in the electromagnetically heated gas-liquid separation shell 51 enters the shell side of the evaporation device 4 through the third pipeline 12, and the fifth electromagnetic heating device 13 heats the secondary steam. The heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device 13, the third temperature monitoring component 16 and the control device cooperate to make the secondary steam entering the shell side of the evaporation device 4 reach the set temperature; after completing the heat exchange in the evaporation device 4, the secondary steam enters the shell side of the heat exchange device 2, and the waste heat of the secondary steam is utilized in the heat exchange device 2. The exhaust device 3 extracts the secondary steam in the shell side of the heat exchange device 2, and forms a negative pressure in the electromagnetically heated gas-liquid separation shell 51.

[0095] Specifically, the sixth temperature monitoring component 19 and the third temperature monitoring component 16 monitor the temperature before and after the secondary steam is heated, respectively, and the fifth electromagnetic heating controller 22 reads the temperature and sets the corresponding heating parameters. Preferably, when the evaporation concentration system is started after shutdown, the temperature of the unheated secondary steam is 77.91°C, and the temperature after heating needs to be maintained between 96.07°C and 98.72°C.

[0096] The exhaust device 3 is connected to the secondary steam outlet 54 of the electromagnetic heating gas-liquid separation shell 51 through the second connecting pipe 37, the shell side of the heat exchange device 2, the first connecting pipe 36, the shell side of the evaporation device 4 and the third pipeline 12. That is, by setting the exhaust device 3, a negative pressure can be formed inside the electromagnetic heating gas-liquid separation shell 51, thereby reducing the boiling point of the zinc gluconate solution. Compared with normal pressure, boiling and evaporation of the zinc gluconate solution can be achieved at a lower temperature, thereby avoiding gelatinization, carbonization and discoloration of zinc gluconate due to excessive heating temperature.

[0097] Heat energy utilization is achieved through heat exchange between the secondary steam in the shell side of the evaporator 4 and the zinc gluconate solution in the tube side of the evaporator 4. The remaining secondary steam after the heat exchange enters the heat exchange device 2, and the energy of the secondary steam is continuously utilized, thereby reducing energy consumption in the next preheating process.

[0098] Step A6: The zinc gluconate solution after evaporation and concentration in the fluid guide 56 is transported to the pipe side of the evaporation device 4 through a reflux pumping device for reflux circulation to be evaporated and concentrated again.

[0099] After the zinc gluconate evaporation and concentration system is running stably, perform the following steps:

[0100] Step B1: The circulating pumping device pumps the zinc gluconate solution from the first outlet 38 of the storage device 1 to the tube side of the heat exchange device 2. In the shell side of the heat exchange device 2, there is secondary steam flowing out from the evaporation device 4 after completing the heat exchange. The zinc gluconate solution is heated up after the heat exchange with the secondary steam, and then flows into the storage device 1 from the reflux port 40 of the storage device 1. The zinc gluconate solution after preliminary preheating is pumped from the second outlet 39 of the storage device 1 to the tube side of the evaporation device 4 through the first pumping device. The zinc gluconate solution transported by the first pumping device reaches the set temperature before entering the evaporation device 4 through the cooperation of the first electromagnetic heating device 8, the first temperature monitoring component 14 and the control device. Compared with the initial startup stage, the heating power of the first electromagnetic heating device 8 is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased.

[0101] Specifically, the first electromagnetic heating device 8 is started, and the heating temperature is set between 80° C. and 85° C. to ensure that the temperature of the preheated material is maintained at 75° C. to 77° C. Compared with the initial startup stage, the heating power of the first electromagnetic heating device 8 is appropriately reduced to achieve energy saving effect and improve system stability.

[0102] Step B2: the zinc gluconate solution enters the tube side of the evaporation device 4, and secondary steam exists in the shell side of the evaporation device 4. The temperature of the zinc gluconate solution increases after heat exchange with the secondary steam; then the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device 5 by the second pumping device, and the second electromagnetic heating device 11 heats the zinc gluconate solution. The second electromagnetic heating device 11, the second temperature monitoring component 15 and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device 5, and make the zinc gluconate solution become a gas-liquid mixture. Compared with the initial startup stage, the heating power of the second electromagnetic heating device 11 is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased.

[0103] The preheated zinc gluconate solution enters the evaporation device 4, first enters the mist collector 44 to remove bubbles and impurities, and then enters the distributor 48 for uniform distribution. Further, the 96°C secondary steam in the heating chamber 47 reheats the preheated solution until its temperature rises to a boiling state and reaches the target evaporation temperature of 80°C, ensuring the stability of the evaporation process and the heat transfer effect of the material.

[0104] Specifically, the zinc gluconate solution is evenly distributed in the entire heating chamber 47 by the distributor 48 to ensure sufficient heat exchange between the zinc gluconate solution and the secondary steam. In the evaporator 4, the heated zinc gluconate solution becomes a gas-liquid coexistence state, containing generated steam and incompletely evaporated liquid.

[0105] The steam generated during the evaporation process is mixed with the zinc gluconate solution and enters the second pipeline 9 together. At the gas-liquid mixing inlet 53, the temperature value is obtained by the fifth temperature monitoring component 18 and the second temperature monitoring component 15, and transmitted to the second electromagnetic heating controller 21. Compared with the initial start-up, the heating power of the second electromagnetic heating device 11 is reduced to maintain the material temperature at 78°C to 80°C, ensuring the appropriate temperature and reducing energy waste.

[0106] Specifically, the gas-liquid mixture produced by the evaporation device 4 enters the electromagnetic heating gas-liquid separation device 5 through the second pipeline 9, and the liquid at this time contains more steam and incompletely evaporated liquid. Due to energy loss in pipeline transportation, the steam reaching the electromagnetic heating gas-liquid separation device 5 is lower in temperature and insufficient in heat compared with the steam produced by the evaporation device 4, and the incompletely evaporated liquid needs to be further evaporated. For this reason, a second electromagnetic heating device 11 is installed on the second pipeline 9 to perform electromagnetic supplementary heating on the material. The purpose of the second electromagnetic heating device 11 is not only to replenish the energy lost by the steam during transportation to a suitable temperature, but also to continue to heat and evaporate the incompletely evaporated liquid, thereby greatly improving the efficiency of the entire evaporation. Especially when the material viscosity is high or the heat sensitivity is high, this heating method can effectively reduce the temperature difference between the heat source and the material, reduce the heating temperature, and avoid the occurrence of local overheating.

[0107] Step B3: The gas-liquid mixture enters the electromagnetic heating gas-liquid separation device 5, and the third electromagnetic heating device 58 and / or the fourth electromagnetic heating device 59 heat the gas-liquid mixture. The third electromagnetic heating device 58 and / or the fourth electromagnetic heating device 59 cooperate with the temperature monitoring component 512 and the control device in the shell, so that the temperature of the internal material of the electromagnetic heating gas-liquid separation shell 51 is maintained at the set temperature, ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam.

[0108] Specifically, the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device 5 for separation. During this process, the material temperature is monitored in real time by the shell temperature monitoring component 512 and the internal temperature monitoring component 514. Since the heat obtained by the material in the heat exchange process after stable operation is significantly higher than that in the initial stage of startup, the heating power of the third electromagnetic heating device 58 and the fourth electromagnetic heating device 510 can be appropriately reduced, but it is still necessary to ensure that the electromagnetic heating gas-liquid separation device 5 is maintained within the effective evaporation temperature range to ensure that the gas-liquid separation is fully carried out.

[0109] Step B4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing 51 , it flows through the top edge of the fluid guide 56 to the inside of the fluid guide 56 .

[0110] Step B5: The secondary steam in the electromagnetically heated gas-liquid separation shell 51 enters the shell side of the evaporation device 4 through the third pipeline 12, and the fifth electromagnetic heating device 13 heats the secondary steam. The heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device 13, the third temperature monitoring component 16 and the control device cooperate to make the secondary steam entering the shell side of the evaporation device 4 reach the set temperature; after completing the heat exchange in the evaporation device 4, the secondary steam enters the shell side of the heat exchange device 2, and the waste heat of the secondary steam is utilized in the heat exchange device 2. The exhaust device 3 extracts the secondary steam in the shell side of the heat exchange device 2, and forms a negative pressure in the electromagnetically heated gas-liquid separation shell 51.

[0111] Specifically, the secondary steam enters the fifth electromagnetic heating device 13 through the third pipeline 12 for secondary heating treatment. The sixth temperature monitoring component 19 and the third temperature monitoring component 16 are used to detect the temperature of the secondary steam, and the fifth electromagnetic heating controller 22 adjusts the heating parameters. Preferably, the heating temperature of the secondary steam is maintained at 96.07°C to 98.72°C to ensure that the heat of the secondary steam is effectively recovered and the energy utilization efficiency of the system is improved.

[0112] Specifically, steam and incompletely evaporated liquid enter the electromagnetic heating gas-liquid separation device 5 together. As the two phases continue to enter, the gas-liquid two phases will contact the fluid guide 56, and the liquid and gas will flow according to the shape of the fluid guide 56, thereby forming a flow channel between the fluid guide 56 and the inner wall of the electromagnetic heating gas-liquid separation shell, and the gas-liquid two phases flow accordingly along the specific path of the fluid guide 56. When the gas-liquid two phases flow through the fluid guide 56, the surface contact area is increased due to the first vertical protrusion 564, which further effectively improves the heat transfer efficiency, and improves the gas-liquid separation effect in a more effective way.

[0113] As the amount of fluid increases, the liquid flows from the outside to the inside of the fluid guide 56. The inside is also provided with a second vertical protrusion 565, which increases the surface contact area and further effectively improves the heat transfer efficiency. In the fluid guide 56, when the gas and liquid phases move inward, the gas rises and the liquid flows downward.

[0114] When the secondary steam flows into the third pipeline 12, the fifth electromagnetic heating device 13 is used to heat it, and an eddy current effect is generated through the high-frequency induction coil and the third pipeline 12 made of metal material, and the heat is transferred to the secondary steam. The rapid heating characteristics of electromagnetic heating ensure that the temperature of the secondary steam can reach the required level in a relatively short time. After electromagnetic heating, the temperature of the secondary steam is increased and the energy loss is compensated. By accurately controlling the power and heating time of the fifth electromagnetic heating device 13 by the fifth electromagnetic heating controller 22, accurate heating of the secondary steam can be achieved, and the heated secondary steam can meet the requirements of the subsequent process for steam temperature and energy.

[0115] By rationally designing the structure and configuration of the fifth electromagnetic heating device 13, the energy utilization efficiency can be improved. By optimizing factors such as the heat transfer surface area, the selection of materials, and the heat transfer method, energy loss can be minimized and the thermal efficiency of the system can be improved. Specifically, in this embodiment, 430 stainless steel is selected as the third pipeline 12, and the material of the fifth electromagnetic heating coil is TU1 oxygen-free copper, and the coil material is wrapped with alkali-free glass ribbon to insulate the coil.

[0116] Step B6: The zinc gluconate solution after evaporation and concentration in the fluid guide 56 is transported to the pipe side of the evaporation device 4 through the reflux pumping device for reflux circulation to be evaporated and concentrated again; when the concentration of the zinc gluconate solution after evaporation and concentration in the fluid guide 56 reaches a set value, the reflux pumping device is closed, and the discharge pumping device is opened to discharge the zinc gluconate solution after evaporation and concentration.

[0117] Specifically, when the concentration of the zinc gluconate solution reaches 30% (w / w), the reflux pump 27 is closed, the discharge valve 29 and the discharge pump 30 are opened, and the concentrated solution is discharged for subsequent treatment. After the evaporation and concentration process is completed, the evaporation capacity of the system reaches 1260kg / h, and the output of the concentrated solution is 3465kg / h, which reflects the high efficiency and stability of the process.

[0118] In this embodiment, a sampling tube is provided at the lower part of the discharge pipe 57 located at one end outside the electromagnetic heating gas-liquid separation shell 51, and a sampling valve is provided on the sampling tube. When it is necessary to detect the concentration of the evaporated and concentrated zinc gluconate solution flowing out of the fluid guide 56 through the discharge pipe 57, the sampling valve is opened to take samples, and then the concentration is measured by a refractometer.

[0119] It can be seen that compared with traditional process equipment, the electromagnetic heating technology used in multiple places in this embodiment can achieve efficient and rapid heating. In actual production, real-time temperature monitoring and automatic control systems can be used to achieve precise temperature regulation in the entire evaporation and concentration process, avoid overheating or insufficient heating, and accurately meet the temperature requirements in the evaporation and concentration process of zinc gluconate solution.

[0120] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A zinc gluconate evaporation and concentration system, characterized in that: The invention comprises a material storage device, a heat exchange device, an evaporation device, an electromagnetic heating gas-liquid separation device, an exhaust device and a control device, wherein a first outlet of the material storage device is connected to a pipe-side inlet of the heat exchange device, and a pipe-side outlet of the heat exchange device is connected to a reflux port on one side of an upper portion of the material storage device through a circulation pumping device, and a second outlet of the material storage device is connected to a pipe-side inlet of the evaporation device through a first pumping device, and a first electromagnetic heating device and a first temperature monitoring component are provided on the first pumping device, and the first temperature monitoring component is used to monitor the temperature of the material after being heated by the first electromagnetic heating device; the electromagnetic heating gas-liquid separation device comprises an electromagnetic heating gas-liquid separation shell, a flow The invention relates to a body guide and a discharge pipe, wherein the fluid guide is arranged in the electromagnetic heating gas-liquid separation shell, the upper end of the fluid guide is open and the lower end is closed, one end of the discharge pipe extends into the fluid guide, and the other end passes through the electromagnetic heating gas-liquid separation shell and extends to the outside, the other end of the discharge pipe is connected to the tube-side inlet of the evaporator through a reflux pumping device, and the other end of the discharge pipe is connected to the discharge pumping device; the tube-side outlet of the evaporator is connected to the inlet at the bottom of the electromagnetic heating gas-liquid separation shell through a second pumping device, and the second pumping device is provided with a second electromagnetic heating device and a second temperature monitoring component, and the second temperature monitoring component is used to The temperature of the material after being heated by the second electromagnetic heating device is monitored; a third electromagnetic heating device is arranged on the outside of the electromagnetic heating gas-liquid separation shell, a fourth electromagnetic heating device is arranged on the fluid guide, an in-shell temperature monitoring component is arranged in the electromagnetic heating gas-liquid separation shell, the in-shell temperature monitoring component is used to monitor the temperature of the material in the electromagnetic heating gas-liquid separation shell, and a shell temperature monitoring component is arranged on the outside of the electromagnetic heating gas-liquid separation shell; the outlet at the top of the electromagnetic heating gas-liquid separation shell is connected to the shell side inlet of the evaporation device through a third pipeline, a fifth electromagnetic heating device and a third temperature monitoring component are arranged on the third pipeline, and the third temperature monitoring component is used to monitor the temperature of the material in the electromagnetic heating gas-liquid separation shell. The temperature monitoring component is used to monitor the temperature of the secondary steam after being heated by the fifth electromagnetic heating device. The shell side outlet of the evaporator is connected to the shell side inlet of the heat exchange device. The shell side outlet of the heat exchange device is connected to the exhaust device. The exhaust device is used to form a negative pressure in the electromagnetic heating gas-liquid separation shell; the first electromagnetic heating device, the second electromagnetic heating device, the third electromagnetic heating device, the fourth electromagnetic heating device, the fifth electromagnetic heating device, the first temperature monitoring component, the second temperature monitoring component, the shell temperature monitoring component, and the third temperature monitoring component are all connected to the control device.

2. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: A first shell insulation layer is arranged on the outside of the electromagnetic heating gas-liquid separation shell, the third electromagnetic heating device is sleeved on the outside of the first shell insulation layer and corresponds to the setting position of the fluid guide, and the shell temperature monitoring component is arranged between the first shell insulation layer and the electromagnetic heating gas-liquid separation shell.

3. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The fluid guide comprises a bottom support mechanism, an outer tube, an inner tube and a top sealing component. The bottom of the outer tube is arranged at the bottom of the electromagnetic heating gas-liquid separation shell through the bottom support mechanism. The lower parts of the outer tube and the inner tube are both bowl-shaped structures protruding downward. The upper ends of the outer tube and the inner tube are both open structures. The inner tube is arranged in the outer tube. The upper ends of the outer tube and the inner tube are connected through the top sealing component. The fourth electromagnetic heating device is arranged on the outer wall of the inner tube. A plurality of first vertical protrusions are arranged on the outer wall of the outer tube at intervals in the circumferential direction. A plurality of second vertical protrusions are arranged on the inner wall of the inner tube at intervals in the circumferential direction. A plurality of convex strips are arranged on the top sealing component at intervals in the circumferential direction. An internal temperature monitoring component is arranged inside the inner tube. The internal temperature monitoring component is used to monitor the temperature of the material in the inner tube. An external temperature monitoring component is arranged on the outer wall of the outer tube. Both the internal temperature monitoring component and the external temperature monitoring component are connected to the control device.

4. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The evaporation device comprises an evaporation shell, a first partition, a second partition, a mist catcher and a distributor. The top and bottom of the evaporation shell are respectively provided with an inlet and a discharge port. The inlet and the discharge port are respectively the tube-side inlet and the tube-side outlet of the evaporation device. The first pumping device and the reflux pumping device are both connected to the inlet, and the discharge port is connected to the second pumping device. The first partition and the second partition are sequentially arranged in the evaporation shell from top to bottom, and a heating chamber is formed between the first partition and the second partition. The mist catcher is arranged in the evaporation shell and is located above the first partition. The distributor is arranged in the heating chamber. The first partition is provided with a second partition connected to the inlet of the distributor. an opening, a second opening connected to the outlet of the distributor is provided on the second partition, a secondary steam inlet connected to the lower part of the heating chamber is provided on one side of the evaporation shell, the secondary steam inlet is connected to the third pipeline, a steam exhaust port connected to the upper part of the heating chamber is provided on the other side of the evaporation shell, the steam exhaust port is connected to the shell side inlet of the heat exchange device, the secondary steam inlet and the steam exhaust port are respectively the shell side inlet and the shell side outlet of the evaporation device; the feed inlet, the first opening, the interior of the distributor, the second opening and the discharge port are connected in sequence to form the tube side of the evaporation device, and the shell side of the evaporation device is formed between the evaporation shell and the outside of the distributor.

5. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The first pumping device includes a first pipeline and a first pump arranged on the first pipeline, the two ends of the first pipeline are respectively connected to the second outlet of the storage device and the pipe inlet of the evaporation device, the first electromagnetic heating device is arranged on the first pipeline and is located between the first pump and the evaporation device, the first temperature monitoring component is arranged in the first pipeline and is located between the first electromagnetic heating device and the evaporation device, a fourth temperature monitoring component is arranged in the first pipeline, the fourth temperature monitoring component is located between the first electromagnetic heating device and the first pump, and the fourth temperature monitoring component is connected to the control device.

6. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The second pumping device includes a second pipeline and a second pump arranged on the second pipeline, the two ends of the second pipeline are respectively connected to the tube outlet of the evaporator and the inlet at the bottom of the electromagnetic heating gas-liquid separation shell, the second electromagnetic heating device is arranged on the second pipeline and is located between the second pump and the electromagnetic heating gas-liquid separation shell, the second temperature monitoring component is arranged in the second pipeline and is located between the second electromagnetic heating device and the electromagnetic heating gas-liquid separation shell, a fifth temperature monitoring component is arranged in the second pipeline, the fifth temperature monitoring component is located between the second electromagnetic heating device and the second pump, and the fifth temperature monitoring component is connected to the control device.

7. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The third temperature monitoring component is arranged in the third pipeline and is located between the fifth electromagnetic heating device and the evaporation device. A sixth temperature monitoring component is arranged in the third pipeline and is located between the fifth electromagnetic heating device and the electromagnetic heating gas-liquid separation shell. The sixth temperature monitoring component is connected to the control device.

8. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The reflux pumping device comprises a reflux pipe and a reflux pump arranged on the reflux pipe. Both ends of the reflux pipe are respectively connected to one end of the discharge pipe extending to the outside and the pipe side inlet of the evaporation device.

9. The zinc gluconate evaporation and concentration system according to claim 1, characterized in that: The discharge pumping device comprises a discharge pipe, a discharge valve and a discharge pump which are sequentially arranged on the discharge pipe, and one end of the discharge pipe is connected to one end of the discharge pipe extending to the outside.

10. A method for using the zinc gluconate evaporation and concentration system according to any one of claims 1 to 9, characterized in that: The operation steps of starting the zinc gluconate evaporation and concentration system after shutdown are as follows: Step A1: the circulating pumping device pumps the zinc gluconate solution from the first outlet of the material storage device to the tube side of the heat exchange device, and then the zinc gluconate solution flows into the material storage device from the reflux port of the material storage device. In the initial startup, there is no secondary steam in the shell side of the heat exchange device, so no heat exchange occurs; The zinc gluconate solution is pumped from the second outlet of the material storage device to the pipe side of the evaporation device through the first pumping device, and the first electromagnetic heating device, the first temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the first pumping device reach the set temperature before entering the evaporation device; Step A2: the zinc gluconate solution enters the tube side of the evaporator, and there is no secondary steam in the shell side of the evaporator at the initial start-up, so no heat exchange occurs; then the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device by the second pumping device, and the second electromagnetic heating device heats the zinc gluconate solution. The second electromagnetic heating device, the second temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device, and make the zinc gluconate solution become a gas-liquid mixture; Step A3: the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device, and the third electromagnetic heating device and / or the fourth electromagnetic heating device heat the gas-liquid mixture. The third electromagnetic heating device and / or the fourth electromagnetic heating device cooperate with the temperature monitoring component in the shell and the control device to keep the temperature of the internal material of the electromagnetic heating gas-liquid separation shell at a set temperature, thereby ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam; Step A4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing, it flows through the top edge of the fluid guide to the interior of the fluid guide; Step A5: the secondary steam in the electromagnetic heating gas-liquid separation shell enters the shell side of the evaporation device through the third pipeline, the fifth electromagnetic heating device heats the secondary steam, and the heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device, the third temperature monitoring component and the control device cooperate to make the secondary steam entering the shell side of the evaporation device reach a set temperature; the secondary steam enters the shell side of the heat exchange device after completing heat exchange in the evaporation device, and the waste heat of the secondary steam is utilized in the heat exchange device. The exhaust device extracts the secondary steam in the shell side of the heat exchange device, and forms a negative pressure in the electromagnetic heating gas-liquid separation shell; Step A6: the zinc gluconate solution after evaporation and concentration in the fluid guide is transported to the pipe side of the evaporation device through the reflux pumping device for reflux circulation to be evaporated and concentrated again; After the zinc gluconate evaporation and concentration system is running stably, the following steps are performed: Step B1: the circulating pumping device pumps the zinc gluconate solution from the first outlet of the material storage device to the tube side of the heat exchange device. The shell side of the heat exchange device contains secondary steam flowing out from the evaporation device after completing the heat exchange. The zinc gluconate solution is heated up after the heat exchange with the secondary steam, and then flows into the material storage device from the reflux port of the material storage device. The zinc gluconate solution after preliminary preheating is pumped from the second outlet of the material storage device to the tube side of the evaporation device through the first pumping device. The first electromagnetic heating device, the first temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the first pumping device reach the set temperature before entering the evaporation device. Compared with the initial startup stage, the heating power of the first electromagnetic heating device is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased. Step B2: the zinc gluconate solution enters the tube side of the evaporation device, and secondary steam exists in the shell side of the evaporation device. The temperature of the zinc gluconate solution increases after heat exchange with the secondary steam; then the zinc gluconate solution is pumped to the electromagnetic heating gas-liquid separation device by the second pumping device, and the second electromagnetic heating device heats the zinc gluconate solution. The second electromagnetic heating device, the second temperature monitoring component and the control device cooperate to make the zinc gluconate solution transported by the second pumping device reach the set temperature before entering the electromagnetic heating gas-liquid separation device, and make the zinc gluconate solution become a gas-liquid mixture. Compared with the initial startup stage, the heating power of the second electromagnetic heating device is reduced or the flow rate of the zinc gluconate solution treated by the zinc gluconate evaporation and concentration system is increased; Step B3: the gas-liquid mixture enters the electromagnetic heating gas-liquid separation device, and the third electromagnetic heating device and / or the fourth electromagnetic heating device heat the gas-liquid mixture. The third electromagnetic heating device and / or the fourth electromagnetic heating device cooperate with the temperature monitoring component in the shell and the control device to keep the temperature of the internal material of the electromagnetic heating gas-liquid separation shell at a set temperature, thereby ensuring that the zinc gluconate solution continues to boil and evaporate to generate secondary steam; Step B4: When the gas-liquid mixture accumulates to a certain height in the electromagnetic heating gas-liquid separation housing, it flows through the top edge of the fluid guide to the interior of the fluid guide; Step B5: the secondary steam in the electromagnetic heating gas-liquid separation shell enters the shell side of the evaporation device through the third pipeline, the fifth electromagnetic heating device heats the secondary steam, and the heated secondary steam is used as a heat source for the evaporation process. The fifth electromagnetic heating device, the third temperature monitoring component and the control device cooperate to make the secondary steam entering the shell side of the evaporation device reach a set temperature; the secondary steam enters the shell side of the heat exchange device after completing heat exchange in the evaporation device, and the waste heat of the secondary steam is utilized in the heat exchange device. The exhaust device extracts the secondary steam in the shell side of the heat exchange device, and forms a negative pressure in the electromagnetic heating gas-liquid separation shell; Step B6: the zinc gluconate solution after evaporation and concentration in the fluid guide is transported to the pipe side of the evaporation device through the reflux pumping device for reflux circulation to be evaporated and concentrated again; When the concentration of the evaporated and concentrated zinc gluconate solution in the fluid guide reaches a set value, the reflux pumping device is closed, and the discharge pumping device is opened to discharge the evaporated and concentrated zinc gluconate solution.

Images