Double-effect evaporator

Abstract

The utility model belongs to the technical field of evaporators, and particularly relates to a double-effect evaporator which comprises a first-effect heating chamber, a second-effect heating chamber, a third-effect heating chamber, a third-effect heating chamber, a fourth-effect heating chamber and a fourth-effect heating chamber. The second-effect heating chamber is arranged on the right side of the first-effect evaporation chamber, a second-effect steam pipe and a second-effect discharging pipe are arranged on the right side of the second-effect heating chamber, and the right side of the second-effect discharging pipe is connected with a second-effect evaporation chamber; the gas-liquid separator is arranged on the right side of the second-effect evaporation chamber, the gas-liquid separator is connected with a condenser, and a water circulation device is arranged at the bottom of the condenser; the device further comprises a drainage device which is arranged at the bottom of the first-effect heating chamber and used for draining accumulated condensate water.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of evaporators, and particularly relates to a double-effect evaporator. BACKGROUND

[0002] The working principle of an evaporator is to heat a solution containing non-volatile solutes to a boiling state, so that part of the solvent is vaporized and removed, thereby increasing the concentration of solutes in the solvent. The double-effect ring evaporator is widely used for evaporation and concentration of water or organic solvent solutions in the pharmaceutical, food, chemical, light industry and other industries, and is particularly suitable for heat-sensitive materials in these industries. Low-temperature continuous concentration is carried out under vacuum conditions.

[0003] The patent with the publication number CN211273591U discloses a double-effect external circulation vacuum evaporator, which comprises a primary heater, the upper and lower parts of the primary heater are connected with a primary evaporator through a primary upper circulation pipe and a primary lower circulation pipe respectively, the primary evaporator is connected with one end of a secondary heater through a first connecting pipe, the upper and lower parts of the secondary heater are connected with a secondary evaporator through a secondary upper circulation pipe and a secondary lower circulation pipe respectively, the secondary evaporator is connected with a shell-and-tube condenser through a second connecting pipe, temperature probes are fixed on one side of the primary heater and the secondary heater through mounting brackets, and an electric control box is mounted on one side of the shell-and-tube condenser.

[0004] The above-mentioned group Anli controls the evaporation heater inside the primary heater and the secondary heater through the cooperation of the temperature probe and the PLC controller to realize intelligent control. However, in actual use, steam will condense into water and gradually accumulate at the bottom of the heater. If the accumulated condensed water is not discharged in time, the evaporation effect will be reduced, and improvement is needed. Practical new type content

[0005] The purpose of the present application is to provide a double-effect evaporator that can solve the above problems.

[0006] The purpose of the present application is to provide a double-effect evaporator, which comprises:

[0007] A primary heating chamber is provided on the right side of the primary evaporator, and a primary steam pipe and a primary discharge pipe are arranged on the right side of the primary heating chamber, and the primary discharge pipe is connected with a primary evaporator on the right side;

[0008] A secondary heating chamber is arranged on the right side of the primary evaporator, and a secondary steam pipe and a secondary discharge pipe are arranged on the right side of the secondary heating chamber, and the secondary discharge pipe is connected with a secondary evaporator on the right side;

[0009] A gas-liquid separator is arranged on the right side of the secondary evaporator, and the gas-liquid separator is connected with a condenser, and a water circulating device is arranged at the bottom of the condenser;

[0010] The drainage device is arranged at the bottom of the first heating chamber and used for draining the accumulated condensed water.

[0011] The double-effect evaporator utilizes the steam to heat the material in the first heating chamber and then evaporates the material in the first evaporation chamber. The second heating chamber receives the steam from the first evaporation chamber for secondary heating, and then the material is sent to the second evaporation chamber through the second discharge pipe. The gas-liquid separator is arranged at the right side of the second evaporation chamber and used for separating the liquid droplets in the steam to ensure the purity of the steam. The condenser is connected to the gas-liquid separator and used for condensing the steam into water. The water circulation device at the bottom of the condenser can recycle and utilize the condensed water, further improving the energy utilization efficiency. The double-effect evaporator realizes the efficient utilization of the steam heat energy through the two evaporation processes, reduces the energy consumption, and reduces the waste of water resources through the recycling and utilization of the condensed water.

[0012] The drainage device is arranged at the bottom of the first heating chamber and used for draining the accumulated condensed water, preventing the accumulation of the condensed water from reducing the evaporation effect, ensuring the continuous and efficient operation of the evaporator, preventing the accumulation of the condensed water, and further improving the evaporation effect.

[0013] Further, the drainage device comprises:

[0014] The drainage pipe is arranged at the bottom of the first heating chamber,

[0015] The water storage tank is arranged at the bottom of the first heating chamber and communicates with the drainage pipe, and the side wall of the water storage tank is provided with a water level control valve and a drainage port, and the drainage port is provided with a control valve.

[0016] When the water level reaches the set height of the water level control valve, the water level control valve is opened, and the condensed water is drained into the water storage tank through the drainage pipe.

[0017] The drain pipe is arranged at the bottom of the first heating chamber for discharging the condensed water from the heating chamber, and is connected with the water storage tank to ensure that the condensed water can flow into the water storage tank smoothly. The water storage tank is arranged at the bottom of the first heating chamber and is connected with the drain pipe. The water storage tank is used for temporarily storing the condensed water flowing from the drain pipe, and the side wall thereof is provided with a water level control valve and a drain outlet to monitor and adjust the water level in the water storage tank. The water level control valve is installed on the side wall of the water storage tank and is used for monitoring the water level in the water storage tank. When the water level reaches the set height, the water level control valve is automatically opened to allow the condensed water to continue to flow into the water storage tank. The water level control valve can also be connected with the control system to realize automatic alarm or adjustment function, and the control system can be additionally installed. The drain outlet is arranged at the bottom or side wall of the water storage tank and is used for discharging the stored condensed water. A control valve is arranged on the drain outlet to control the discharge time and flow of the condensed water. The control valve can be manually operated or connected with the control system to realize automatic control.

[0018] When the condensed water in the first heating chamber accumulates to a certain amount, the condensed water will flow into the water storage tank through the drain pipe. As the condensed water continues to flow in, the water level in the water storage tank will gradually rise. When the water level reaches the set height of the water level control valve, the water level control valve will automatically open to allow more condensed water to flow into the water storage tank. When it is necessary to discharge the condensed water, the control valve on the drain outlet can be manually or automatically opened to discharge the stored condensed water. Through the cooperation of the drain pipe and the water storage tank, it can ensure that the condensed water is discharged in time to prevent its accumulation in the first heating chamber, and improve the operating efficiency and stability of the evaporator.

[0019] Further, a safety valve is further arranged on the drain pipe.

[0020] The safety valve is an automatic pressure relief device that automatically opens to release pressure when the pressure in the pipeline system or equipment exceeds the set safety value, thereby preventing pipeline rupture, equipment damage or more serious safety accidents. By arranging a safety valve on the drain pipe, if the pressure in the pipeline abnormally rises during the drainage process, the safety valve can be opened in time to release the excessive pressure, protecting the safety of the drain pipe and the evaporator system.

[0021] Further, the vapor return pipe is arranged on one side of the gas-liquid separator and is connected with the second heating chamber at one end of the gas-liquid separator.

[0022] The steam return pipe is arranged based on the working principle of the gas-liquid separator, and its main purpose is to return the steam (or gas) part generated after gas-liquid separation to the previous heating chamber to realize the reuse of heat energy or maintain the stable operation of the system. The steam return pipe is led out from one end of the gas-liquid separator and communicates with the two-effect heating chamber to form a closed loop or open loop reflux system. By returning the steam, the originally wasted heat energy is reused, improving the heat energy utilization rate of the entire evaporation system. It also helps to maintain the stability of the system pressure and temperature, reducing the instability of the system caused by pressure fluctuation or temperature change.

[0023] Further, one side of the water storage tank is also provided with a transparent plate, and the transparent plate is provided with a scale.

[0024] The transparent plate allows the operator to directly observe the water level inside the water storage tank without opening the water storage tank or relying on other measuring tools, making the water level monitoring intuitive and immediate. The scale on the transparent plate provides specific values of the water level, allowing the operator to accurately know the amount of water in the water storage tank, which helps to avoid overflow caused by too high water level or insufficient water supply caused by too low water level. By regularly observing the scale on the transparent plate, the operator can timely discover water level abnormalities such as sudden rise or fall, which may indicate that there is a leak, blockage or other potential problems inside the system, and timely measures can avoid the occurrence or expansion of faults. In addition, according to the scale on the transparent plate, the operator can adjust the opening degree of the drain control valve to control the discharge speed and amount of condensed water. This helps to optimize the operation efficiency of the evaporator while reducing the waste of water resources.

[0025] The beneficial effects of the present application are:

[0026] 1. The double-effect evaporator realizes efficient utilization of steam heat energy through two evaporation processes, reduces energy consumption, and the recovery and utilization of condensed water also reduce the waste of water resources;

[0027] 2. The drain device is located at the bottom of the one-effect heating chamber, which can timely drain the accumulated condensed water, prevent the accumulation of condensed water from causing the evaporation effect to decrease, ensure the continuous and efficient operation of the evaporator, prevent the accumulation of condensed water, and further improve the evaporation effect;

[0028] 3. The transparent plate allows the operator to directly observe the water level inside the water storage tank without opening the water storage tank or relying on other measuring tools, making the water level monitoring intuitive and immediate. By regularly observing the scale on the transparent plate, the operator can timely discover water level abnormalities such as sudden rise or fall, which may indicate that there is a leak, blockage or other potential problems inside the system, and timely measures can avoid the occurrence or expansion of faults. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the utility model;

[0030] Figure 2 is a structural schematic view of the drainage device of the utility model.

[0031] The reference signs in the drawing are: 100, primary heating chamber; 110, primary steam pipe; 120, primary discharge pipe; 130, primary evaporation chamber; 200, secondary heating chamber; 210, secondary steam pipe; 220, secondary discharge pipe; 230, secondary evaporation chamber; 300, gas-liquid separator; 310, condenser; 320, water circulating device; 400, drainage device; 410, drainage pipe; 420, water storage tank; 422, transparent plate; 423, scale; 430, water level control valve; 440, drainage opening; 450, safety valve; 500, steam return pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0033] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a category, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents that the front and rear associated objects are in an "or" relationship.

[0034] The double-effect evaporator provided by the embodiments of the present application will be described in detail below in combination with the drawings, specific embodiments and application scenarios.

[0035] Embodiment 1:

[0036] As shown in Figure 1 and Figure 2 The embodiments of the present application provide a double-effect evaporator, which comprises:

[0037] The primary heating chamber 100 is provided with a primary steam pipe 110 and a primary discharge pipe 120 on the right side, and the primary discharge pipe 120 is connected with a primary evaporation chamber 130 on the right side;

[0038] The double-effect evaporator comprises a one-effect heating chamber 100, a two-effect heating chamber 200, a one-effect evaporation chamber 130, a two-effect evaporation chamber 230, a gas-liquid separator 300, and a water drainage device 400.

[0039] The gas-liquid separator 300 is arranged at the right side of the two-effect evaporation chamber 230, and is connected with a condenser 310.

[0040] The water drainage device 400 is arranged at the bottom of the one-effect heating chamber 100, and is used for draining the accumulated condensed water.

[0041] In some embodiments of the present application, as shown in the accompanying drawings, Figure 1 The one-effect heating chamber 100 is heated by introducing steam through the one-effect steam pipe 110, and the heated material is sent into the one-effect evaporation chamber 130 through the one-effect discharge pipe 120. The two-effect heating chamber 200 receives steam from the one-effect evaporation chamber 130 for secondary heating, and sends the material into the two-effect evaporation chamber 230 through the two-effect discharge pipe 220, thereby fully utilizing the heat energy of the steam and improving the evaporation efficiency. The gas-liquid separator 300 is arranged at the right side of the two-effect evaporation chamber 230, and is used for separating liquid droplets in the steam to ensure the purity of the steam. The condenser 310 is connected to the gas-liquid separator 300, and is used for condensing the steam into water. The water circulation device 320 at the bottom of the condenser 310 can recycle and utilize the condensed water, thereby further improving the energy utilization efficiency. The double-effect evaporator realizes efficient utilization of steam heat energy through two evaporation processes, reduces energy consumption, and prevents the accumulation of condensed water, thereby further improving the evaporation effect.

[0042] The water drainage device 400 is arranged at the bottom of the one-effect heating chamber 100, and is used for draining the accumulated condensed water, thereby preventing the accumulation of condensed water from reducing the evaporation effect, ensuring the continuous and efficient operation of the evaporator, and further improving the evaporation effect.

[0043] Further, the gas-liquid separator 300 is provided with a steam return pipe 500 at one side, and one end of the steam return pipe 500 is connected in communication with the two-effect heating chamber 200.

[0044] The steam return pipe 500 is arranged based on the working principle of the gas-liquid separator 300, and the main purpose is to return the steam (or gas) part generated after gas-liquid separation to the previous heating chamber to realize the reuse of heat energy or maintain the stable operation of the system. The steam return pipe 500 is led out from one end of the gas-liquid separator 300 and is in communication with the double-effect heating chamber 200, forming a closed loop or open loop return system. By returning the steam, the heat energy that would otherwise be wasted is reused, improving the heat energy utilization rate of the entire evaporation system. And it helps to maintain the stability of the pressure and temperature of the system, reduces the instability of the system caused by pressure fluctuation or temperature change.

[0045] Embodiment 2:

[0046] The embodiment of the present application provides a double-effect evaporator, in addition to the above technical features, the double-effect evaporator of the embodiment of the present application further comprises the following technical features.

[0047] As shown in Figure 1 and Figure 2 , the drainage device 400 comprises:

[0048] The drain pipe 410 is arranged at the bottom of the one-effect heating chamber 100,

[0049] The water storage tank 420 is arranged at the bottom of the one-effect heating chamber 100 and is in communication with the drain pipe 410, and the side wall of the water storage tank 420 is provided with a water level control valve 430 and a drain port 440, and the drain port 440 is provided with a control valve;

[0050] When the water level reaches the set height of the water level control valve 430, the water level control valve 430 is opened, and the condensed water is discharged into the water storage tank 420 through the drain pipe 410.

[0051] In the embodiments of the present application, the water pipe 410 is arranged at the bottom of the single-effect heating chamber 100 for discharging the condensed water from the heating chamber. The drain pipe 410 is connected with the water storage tank 420 to ensure that the condensed water can flow smoothly into the water storage tank 420. The water storage tank 420 is arranged at the bottom of the single-effect heating chamber 100 and is connected with the drain pipe 410. The water storage tank 420 is used for temporarily storing the condensed water flowing from the drain pipe 410. The side wall of the water storage tank 420 is provided with a water level control valve 430 and a drain outlet 440 to monitor and adjust the water level in the water storage tank 420. The water level control valve 430 is installed on the side wall of the water storage tank 420 to monitor the water level in the water storage tank 420. When the water level reaches the set height, the water level control valve 430 will automatically open to allow the condensed water to continue to flow into the water storage tank 420. The water level control valve 430 can also be connected with the control system to realize automatic alarm or adjustment function. The control system can be additionally installed. The drain outlet 440 is arranged at the bottom or side wall of the water storage tank 420 to discharge the stored condensed water. A control valve is arranged on the drain outlet 440 to control the discharge time and flow of the condensed water. The control valve can be manually operated or connected with the control system to realize automatic control.

[0052] When the condensed water in the single-effect heating chamber 100 accumulates to a certain amount, the condensed water will flow into the water storage tank 420 through the drain pipe 410. As the condensed water continues to flow in, the water level in the water storage tank 420 will gradually rise. When the water level reaches the set height of the water level control valve 430, the water level control valve 430 will automatically open to allow more condensed water to flow into the water storage tank 420. When it is necessary to discharge the condensed water, the control valve on the drain outlet 440 can be manually or automatically opened to discharge the stored condensed water. Through the cooperation of the drain pipe 410 and the water storage tank 420, it can ensure that the condensed water is discharged in time to prevent its accumulation in the single-effect heating chamber 100, thereby improving the operating efficiency and stability of the evaporator.

[0053] Moreover, a safety valve 450 is arranged on the drain pipe 410.

[0054] In some embodiments of the present application, the safety valve 450 serves as an automatic pressure relief device that automatically opens to release pressure when the pressure in the pipeline system or equipment exceeds the set safety value, thereby preventing pipeline rupture, equipment damage or more serious safety accidents. By arranging the safety valve 450 on the drain pipe 410, if the pressure in the pipeline abnormally rises during the drainage process, the safety valve 450 can open in time to release the excessively high pressure, thereby protecting the safety of the drain pipe 410 and the evaporator system.

[0055] Embodiment 3:

[0056] The embodiments of the present application provide a double-effect evaporator. In addition to the above technical features, the double-effect evaporator of the embodiments of the present application further comprises the following technical features.

[0057] As Figure 1 and Figure 2 shown, one side of the water storage tank 420 is also provided with a transparent plate 422, and the transparent plate 422 is provided with a scale 423.

[0058] In the embodiments of the present application, the transparent plate 422 allows the operator to directly observe the water level inside the water storage tank 420, without the need to open the water storage tank 420 or rely on other measuring tools, making the water level monitoring intuitive and immediate. The scale 423 on the transparent plate 422 provides a specific value of the water level, allowing the operator to accurately know the amount of water in the water storage tank 420, which helps to avoid overflow caused by too high water level or insufficient water supply caused by too low water level. By regularly observing the scale 423 on the transparent plate 422, the operator can timely discover water level abnormalities, such as sudden rise or fall of the water level, which may indicate that there is a leak, blockage or other potential problems inside the system, and timely measures can avoid the occurrence or expansion of faults. In addition, according to the scale 423 on the transparent plate 422, the operator can adjust the opening degree of the drain port 440 control valve to control the discharge speed and amount of condensate water. This helps to optimize the operating efficiency of the evaporator, while reducing the waste of water resources.

[0059] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples. The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above specific embodiments, which are only illustrative and not limiting, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A double-effect evaporator characterized by: The application relates to a multi-effect evaporator, which comprises the following parts: an effect heating chamber (100) provided with an effect steam pipe (110) and an effect discharge pipe (120) on the right side respectively, and an effect evaporation chamber (130) connected to the right side of the effect discharge pipe (120); an effect two heating chamber (200) provided on the right side of the effect evaporation chamber (130), and provided with an effect two steam pipe (210) and an effect two discharge pipe (220) on the right side of the effect two heating chamber (200), and an effect two evaporation chamber (230) connected to the right side of the effect two discharge pipe (220); a gas-liquid separator (300) provided on the right side of the effect two evaporation chamber (230), and connected with a condenser (310), and provided with a water circulating device (320) at the bottom of the condenser (310); wherein, a drainage device (400) is arranged at the bottom of the effect heating chamber (100) for draining accumulated condensed water.

2. A double-effect evaporator according to claim 1, characterized in that: The drainage device (400) comprises: a drainage pipe (410) arranged at the bottom of the effect heating chamber (100), a water storage tank (420) arranged at the bottom of the effect heating chamber (100) and communicated with the drainage pipe (410), and provided with a water level control valve (430) and a drainage opening (440) on the side wall of the water storage tank (420), and a control valve arranged on the drainage opening (440); wherein, when the water level reaches the set height of the water level control valve (430), the water level control valve (430) is opened, and the condensed water is drained into the water storage tank (420) through the drainage pipe (410).

3. A double-effect evaporator according to claim 2, characterized in that: A safety valve (460) is further arranged on the drainage pipe (410).

4. A double-effect evaporator according to claim 3, characterized in that: A steam return pipe (500) is arranged on one side of the gas-liquid separator (300), and one end of the steam return pipe (500) is communicated with the effect two heating chamber (200).

5. A double-effect evaporator according to claim 4, characterized in that: A transparent plate (422) is further arranged on one side of the water storage tank (420), and a scale (423) is arranged on the transparent plate (422).

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