Storage tank heating system

Abstract

The utility model discloses a storage tank heating system which comprises a steam condensate water inlet and a steam condensate water outlet, the steam condensate water inlet is located on the upstream of a storage tank, the other end of the steam condensate water inlet is connected with a condensate water temporary storage pool, and condensate water of the condensate water temporary storage pool comes from a reaction kettle; the steam condensate outlet is located at the downstream of the storage tank, and the other end of the steam condensate inlet is connected with the condensate temporary storage pool. By means of the structure, high-temperature condensate water generated by the reaction kettle can flow through the storage tank so as to heat the storage tank, compared with existing ribbon heater heating or steam heating, the storage tank heating system has the remarkable energy-saving performance, waste heat of the condensate water is utilized in the system, and the energy-saving effect is achieved. And the subsequent condensate water treatment time can be shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of storage tank heating, in particular to a storage tank heating system. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] Storage tanks in the chemical industry mainly refer to containers used to store chemical products, such as gaseous or liquid acids and alkalis, alcohols, catalysts, solvents, crude oil, etc. In some usage scenarios, storage tanks not only need to store items, but also need to be heated, mainly to ensure the fluidity and stability of the stored substances and prevent them from solidifying, crystallizing, stratifying, and precipitating, such as crude oil, diesel, asphalt, wax, etc.; or to improve the quality and efficiency of stored substances and promote their chemical reactions or physical changes, such as catalysts, reactors, fermentation tanks, crystallization tanks, concentration tanks, etc.; or to prevent the frozen cracking or expansion of stored substances, causing damage or leakage of storage tanks, such as water, ethylene glycol, liquid ammonia, etc. In a specific scenario, the material is an easy-to-crystallize medium, which will become solid when its temperature is lower than 47°C, so the temperature of the storage tank needs to be kept between 65-85°C to meet the storage requirements.

[0004] The main existing insulation technology is to use electric belts and steam to heat the storage tank. The electric belt process is to wrap the heat-conducting metal around the periphery of the storage tank, and evenly heat the storage tank from the outside to the inside after power is turned on. Steam heating refers to heating the coil in the storage tank so that the higher temperature fluid continues to flow through the storage tank. The above two heating methods inevitably require additional energy to generate more heat, which will significantly increase the system operation cost, especially electric heating, which has poor energy saving performance. Utility Model Content

[0005] The purpose of the utility model is to provide a highly efficient and automated storage tank heating system to solve the problem of high energy consumption of the current storage tank heating system.

[0006] In order to achieve the above-mentioned purpose, the utility model discloses the following storage tank heating system, which is used to heat the storage tank, and includes:

[0007] A steam condensate inlet upstream of the storage tank, the other end of which is connected to a condensate temporary storage tank, wherein the condensate in the condensate temporary storage tank comes from a reactor;

[0008] The steam condensate outlet downstream of the storage tank and the other end of the steam condensate inlet are connected to the condensate temporary storage tank.

[0009] Furthermore, it also includes a steam inlet at the most upstream and a condensed water outlet at the most downstream.

[0010] Furthermore, a pneumatic valve is included between the steam condensate inlet and the storage tank. When the temperature of the storage tank is lower than 65°C, the pneumatic valve automatically opens and steam is passed into the steam inlet. When the temperature of the storage tank is higher than 85°C, the pneumatic valve automatically closes and steam stops passing into the steam inlet.

[0011] Furthermore, it also includes a temperature transmitter and a temperature input alarm between the steam inlet and the steam condensate water inlet.

[0012] Furthermore, it also includes a steam trap between the steam condensate outlet and the condensate outlet.

[0013] Furthermore, it also includes pipe insulation downstream of the steam inlet and upstream of the condensate outlet.

[0014] Furthermore, a condensate pump is included between the condensate temporary storage tank and the steam condensate inlet, so that the condensate continuously circulates in the storage tank.

[0015] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0016] The storage tank heating system of the utility model sets a steam condensate inlet and a steam condensate outlet at the upstream and downstream of the storage tank, so that the storage tank can heat itself with the help of the heat of the steam condensate in the system, and avoids the need to use electric heating belts or steam heating. Among them, the condensate mainly comes from the reactor. During the temperature change of the reactor, condensate is usually generated due to the change in steam pressure. The condensate at this time is often at a higher temperature. Therefore, it can be introduced into the downstream storage tank through the steam condensate inlet to heat the storage tank, realizing waste heat utilization. The condensate flowing through the storage tank is re-discharged into the condensate temporary storage pool from the steam condensate outlet and continues the next cycle. As long as the reaction in the reactor is in progress, the system of the utility model can continuously heat the storage tank through the thermal cycle. Compared with electric heating belts and steam heating, it not only achieves lower energy consumption, but also reduces the difficulty of subsequent treatment of the high-temperature condensate generated by the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1It is a flow chart of a storage tank heating system provided in an embodiment of this specification;

[0019] In the figure: 11, storage tank; 21, steam condensate inlet; 22, steam condensate outlet; 31, steam inlet; 32, condensate outlet; 41, pneumatic valve; 51, temperature transmitter; 52, temperature input alarm; 61, steam trap; 71, upstream pipeline insulation; 72, downstream pipeline insulation. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0021] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0022] See also Figure 1 , is a storage tank heating system provided in this embodiment, used for heating the storage tank 11, comprising:

[0023] A steam condensate inlet 21 upstream of the storage tank 11, the other end of which is connected to a condensate temporary storage tank, wherein the condensate in the condensate temporary storage tank comes from the reactor;

[0024] The steam condensate outlet 22 downstream of the storage tank 11 and the other end of the steam condensate inlet 21 are connected to the condensate temporary storage tank.

[0025] By means of the above storage tank heating system, when the system is running, the temperature of the material stored in the storage tank 11 will continue to drop due to the lack of external heating. At this time, since the reactor in the same system is also running continuously, the reactor continues to produce condensed water with a relatively high temperature, and the condensed water with a relatively high temperature is gathered in the condensed water temporary storage pool. Figure 1 As shown, the condensate temporary storage pool continuously delivers the condensate with a higher temperature to the storage tank 11 through the steam condensate inlet 21. With the help of the condensate with a higher temperature, the system realizes the heating function of the storage tank 11. After the condensate with a higher temperature heats the storage tank 11, the temperature drops. At this time, the storage tank 11 realizes temperature maintenance. The condensate with a lower temperature flows back to the condensate temporary storage pool through the steam condensate outlet 22 to realize this thermal cycle. In the above process, without the help of external electric heating belts or steam heating, the condensate of the reactor is used to heat the storage tank 11, realizing a more energy-saving and environmentally friendly waste heat utilization. While realizing the storage tank 11, it also shortens the time for the system to subsequently process the condensate with a higher temperature.

[0026] Furthermore, the melting point of the material stored in the storage tank 11 in this embodiment is 47°C. When the temperature of the storage tank 11 is lower than 47°C, the easily crystallized material will become solid. Therefore, it is necessary to achieve a temperature position of the storage tank 11 between 65°C and 85°C. The material in the storage tank 11 at this temperature remains in a liquid state, and the temperature of the storage tank 11 meets the requirements. The temperature of the condensed water with a higher temperature generated by the cold and hot changes of the chemical reaction from the reactor is 85°C. The condensed water at 85°C is gathered in the condensed water temporary storage tank and continuously flows to the downstream storage tank 11 through the steam condensed water inlet 21. The condensed water with a higher temperature passes through the surrounding metal heat pipe or other medium, and transfers the heat of the condensed water with a higher temperature to the material in the storage tank 11 with a lower temperature, so that the temperature of the material remains between 65°C and 85°C in a liquid state. After the heat is transferred, the temperature of the condensed water decreases, and it flows back to the condensed water temporary storage tank through the steam condensed water outlet 22 downstream of the storage tank 11. The condensed water flowing back into the condensed water temporary storage tank transfers part of its heat to the storage tank 11, so the temperature of the condensed water is reduced, which significantly shortens the subsequent treatment time of the condensed water.

[0027] Furthermore, it also includes a steam inlet 31 at the most upstream and a steam outlet at the most downstream. When the reactor in the system stops working, the temperature of the condensed water decreases. At this time, the condensed water in the condensed water temporary storage pool cannot meet the demand for heating the storage tank 11. However, in many cases, the material in the storage tank 11 still needs to be kept in a liquid state at a certain temperature. Therefore, in the above state, high-temperature steam can be introduced through the steam inlet 31, and the high-temperature steam flows through the pipeline of the storage tank 11 to heat the storage tank, so that the temperature of the material in the storage tank 11 is maintained between 65°C and 85°C. Finally, the condensed steam is discharged through the steam outlet 32.

[0028] Furthermore, in the present embodiment, a pneumatic valve 41 is also included between the steam condensate inlet 21 and the storage tank 11, which can control the switch, pressure or flow of the higher temperature condensate from the steam condensate inlet 21 to the storage tank 11. The pneumatic valve 41 can also control the switch, pressure or flow of the high temperature steam from the steam inlet 31 when the reactor stops working and the higher temperature condensate does not flow into the steam condensate inlet 21, so that the storage tank 11 always maintains a temperature between 65°C and 85°C. It has a simple structure and is easy to operate, and is convenient for managing the stable heat preservation function of the storage tank 11 to avoid situations such as overheating evaporation or overcooling solidification of materials.

[0029] Furthermore, there is a steam trap 61 between the steam condensate outlet 22 and the condensate outlet 32. The steam trap 61 can automatically open and close itself to discharge the condensate, air and carbon dioxide gas generated by the steam or condensate flowing through the storage tank 11 after the heat transfer as quickly as possible, and automatically prevent the leakage of steam to the greatest extent, so as to meet the optimal operation state of the heating equipment. Figure 1 As shown, the steam trap 61 is also connected in parallel with a ball valve, and the upstream and downstream of the steam trap 61 are also connected in series with ball valves, respectively, to facilitate temporary maintenance of the steam trap 61.

[0030] Furthermore, upstream pipe insulation 71 is included downstream of the steam inlet 31, and downstream pipe insulation 72 is included upstream of the condensate outlet 32, so that the fluid in the pipe of the heating system can maintain a relatively more constant temperature, avoid temperature fluctuations affecting the heating effect of the storage tank 11, and prevent freezing and condensation.

[0031] Furthermore, a condensate pump is included between the condensate storage tank and the steam condensate inlet 21, so that the higher temperature condensate in the condensate storage tank can continuously flow from the steam condensate inlet 21 to the downstream storage tank 11. When the reactor is working, the storage tank 11 can be continuously heated by the higher temperature condensate.

[0032] The storage tank heating system of the present invention can effectively reduce the problem of excessive power consumption caused by heating the storage tank 11 with electric belts and steam in the original technology. Most of the heating heat source of the present invention comes from the waste heat generated by the reactor. The high-temperature condensed water generated by the reactor is collected and output, thereby realizing the recycling of waste heat. At the same time, the subsequent cooling process of the high-temperature condensed water is reduced, thereby improving production efficiency.

[0033] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is 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 a limitation on the present invention.

Claims

1. A storage tank heating system, used for heating a storage tank, characterized in that: include: A steam condensate inlet upstream of the storage tank, the other end of which is connected to a condensate temporary storage tank, wherein the condensate in the condensate temporary storage tank comes from a reactor; The steam condensate outlet downstream of the storage tank and the other end of the steam condensate inlet are connected to the condensate temporary storage tank.

2. The tank heating system according to claim 1, characterized in that: It also includes a steam inlet at the most upstream and a condensate outlet at the most downstream.

3. The tank heating system according to claim 2, characterized in that: There is also a pneumatic valve between the steam condensate inlet and the storage tank. When the temperature of the storage tank is lower than 65°C, the pneumatic valve automatically opens and steam flows into the steam inlet. When the temperature of the storage tank is higher than 85°C, the pneumatic valve automatically closes and steam stops flowing into the steam inlet.

4. The tank heating system according to claim 2, characterized in that: It also includes a temperature transmitter and a temperature input alarm between the steam inlet and the steam condensate water inlet.

5. The tank heating system according to claim 2, characterized in that: It also includes a steam trap between the steam condensate outlet and the condensate outlet.

6. The tank heating system according to claim 2, characterized in that: It also includes pipe insulation downstream of the steam inlet and upstream of the condensate outlet.

7. The tank heating system according to claim 1, characterized in that: A condensate pump is provided between the condensate temporary storage tank and the steam condensate inlet so that the condensate continuously circulates in the storage tank.

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