A device for preventing freezing of liquid caustic soda in industrial circulating water in winter

Abstract

The utility model discloses a kind of for industrial circulating water winter liquid caustic soda freeze protection device, it is related to liquid caustic soda storage tank technical field, including liquid caustic soda storage tank, the inner wall of liquid caustic soda storage tank is provided with jacket layer, and the inside of jacket layer is provided with circulating water heat exchange mechanism, circulating water heat exchange mechanism includes the heat exchange coil pipe being set in the inside of jacket layer, and the water inlet end and water outlet end of heat exchange coil pipe are respectively penetrated through jacket layer, and extend to the water inlet pipe and water outlet pipe respectively connected with outside of liquid caustic soda storage tank, the utility model is by being set in the jacket layer of liquid caustic soda storage tank inner wall circulating water heat exchange mechanism, and normal operation industrial circulating water in chemical plant is introduced as heat source into circulating water heat exchange mechanism, so that industrial circulating water is circulated by heat exchange coil pipe being set in the jacket layer of liquid caustic soda storage tank, to utilize industrial circulating water by heat exchange coil pipe wall surface to liquid caustic soda transfer heat, and then make liquid caustic soda temperature maintain above its crystallization temperature.

Description

Technical Field

[0001] This utility model relates to the field of liquid alkali storage tank technology, specifically a device for preventing liquid alkali from freezing in industrial circulating water during winter. Background Technology

[0002] Liquid alkali (sodium hydroxide aqueous solution) is widely used in the production processes of chemical, fine chemical and new materials industries. It is usually stored and continuously supplied in the form of storage tanks. In the low temperature environment of winter, when the ambient temperature is lower than the crystallization temperature of liquid alkali, liquid alkali is prone to crystallization, increased viscosity or even local freezing, causing problems such as blockage of delivery pipelines, inaccurate metering, and equipment damage. In severe cases, it will affect the continuous operation of the equipment and bring safety hazards.

[0003] Existing methods for preventing freezing of liquid alkali storage tanks in winter mainly include electric heat tracing, steam coil heating, and simple insulation. However, electric heat tracing has high energy consumption, high operating costs, and electrical safety risks. Steam coil heating requires additional steam resources, is complex, and is difficult to operate and manage. Simple insulation cannot meet the freezing requirements under extreme low temperature conditions. In addition, the above-mentioned freezing methods generally suffer from low energy utilization efficiency, high operating costs, and insufficient safety. Especially when chemical enterprises have generally built industrial circulating water systems, a large amount of medium and low temperature waste heat is not effectively utilized, resulting in energy waste. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a device for preventing liquid alkali from freezing in industrial circulating water during winter.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing liquid alkali from freezing in industrial circulating water during winter, comprising a liquid alkali storage tank, wherein the inner wall of the liquid alkali storage tank is provided with a jacket layer, and a circulating water heat exchange mechanism is provided inside the jacket layer, wherein the circulating water heat exchange mechanism includes a heat exchange coil disposed inside the jacket layer, and the inlet end and outlet end of the heat exchange coil respectively penetrate the jacket layer and extend to the outside of the liquid alkali storage tank, and are respectively connected to an inlet pipe and an outlet pipe, wherein the inlet pipe is located on one side of the outlet pipe.

[0006] As described above, the heat exchange coils are arranged in an "S"-shaped annular array in the jacket layer.

[0007] The aforementioned inlet pipe and outlet pipe are respectively connected to the water supply pipeline and return pipeline of the industrial circulating water system.

[0008] The liquid alkali storage tank described above is covered with an insulation sleeve.

[0009] As described above, a temperature sensor is fixedly installed at the middle position of the inner side of one end of the liquid alkali storage tank. The temperature sensor is electrically connected to the control unit, and the control unit is electrically connected to the flow regulating valve and the circulating pump of the industrial circulating water system.

[0010] As described above, the top of the liquid alkali storage tank is connected to a feed pipe, which passes through the insulation sleeve, and one end of the liquid alkali storage tank is connected to a discharge pipe.

[0011] As mentioned above, both the inlet pipe and the outlet pipe are equipped with solenoid valves.

[0012] Compared with existing technologies, this antifreeze device for liquid alkali in industrial circulating water during winter has the following advantages: I. This utility model incorporates a circulating water heat exchange mechanism within the jacket layer of the liquid alkali storage tank. The industrial circulating water, normally operating in the chemical plant, is introduced into the circulating water heat exchange mechanism as a heat source. This allows the industrial circulating water to circulate through heat exchange coils within the jacket layer of the liquid alkali storage tank. The industrial circulating water then transfers heat to the liquid alkali through the heat exchange coil walls, thereby maintaining the liquid alkali temperature above its crystallization temperature. This fully utilizes the waste heat resources of the industrial circulating water, eliminating the need for additional steam or electric heating and significantly reducing operating energy consumption.

[0013] Second, this utility model sets an insulation layer on the outside of the liquid alkali storage tank, which reduces the heat loss of the liquid alkali storage tank due to the low ambient temperature and reduces the heat load of the antifreeze device. In addition, a temperature sensor is set inside the liquid alkali storage tank to monitor the temperature of the liquid alkali in real time and feed it back to the control unit. The control unit adjusts the flow rate of industrial circulating water according to the detected temperature value, thereby realizing on-demand heating.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional sectional view of the liquid alkali storage tank of this utility model; Figure 3 This is a three-dimensional structural diagram of the heat exchange coil of this utility model; Figure 4 This is a three-dimensional cross-sectional structural diagram of the liquid alkali storage tank of this utility model from another perspective.

[0016] In the diagram: 1. Liquid alkali storage tank; 2. Jacket layer; 3. Heat exchange coil; 4. Inlet pipe; 5. Outlet pipe; 6. Insulation jacket; 7. Temperature sensor; 8. Feed pipe; 9. Discharge pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-4 As shown, this utility model provides a technical solution: a device for preventing the freezing of liquid alkali in industrial circulating water during winter, including a liquid alkali storage tank 1. The liquid alkali storage tank 1 is externally fitted with an insulation sleeve 6, which reduces heat loss from the low ambient temperature, thus reducing the heat load on the antifreeze device. The inner wall of the liquid alkali storage tank 1 is provided with a jacket layer 2, and a circulating water heat exchange mechanism is provided inside the jacket layer 2. The circulating water heat exchange mechanism includes heat exchange coils 3 disposed inside the jacket layer 2. The heat exchange coils 3 are arranged in an "S"-shaped annular array within the jacket layer 2, improving the uniformity of heat exchange. The inlet and outlet ends of the heat exchange coils 3 penetrate the jacket layer 2 and extend to the liquid alkali storage tank. Tank 1 is externally connected to an inlet pipe 4 and an outlet pipe 5. The inlet pipe 4 is located on one side of the outlet pipe 5. The inlet pipe 4 and the outlet pipe 5 are respectively connected to the water supply pipeline and the return pipeline of the industrial circulating water system. The industrial circulating water that is operating normally in the chemical plant is introduced into the circulating water heat exchange mechanism as a heat source. The temperature of the industrial circulating water is 20-40℃. The industrial circulating water circulates through the heat exchange coil 3 set in the jacket layer 2 and transfers heat to the liquid alkali through the wall of the heat exchange coil 3, thereby maintaining the temperature of the liquid alkali above its crystallization temperature. Then, the industrial circulating water after heat exchange returns to the industrial circulating water system through the outlet pipe 5, realizing a closed loop circulation without adding additional heat source consumption.

[0019] like Figure 4 As shown, a temperature sensor 7 is fixedly installed at the middle position of the inner side of one end of the liquid alkali storage tank 1. The temperature sensor 7 is electrically connected to the control unit, which is electrically connected to the flow regulating valve and circulation pump of the industrial circulating water system. The temperature sensor 7 monitors the temperature of the liquid alkali in real time and feeds it back to the control unit. The control unit compares the detected temperature value with the set threshold. When the detected temperature value is lower than the set threshold, the control unit controls the flow regulating valve of the industrial circulating water system to increase the flow rate of the industrial circulating water. When the detected temperature value exceeds the set threshold, the control unit controls the flow regulating valve of the industrial circulating water system to decrease the flow rate of the industrial circulating water. At the same time, the control unit also controls the start and stop of the circulation pump.

[0020] like Figure 1 , 2 As shown in Figure 4, the top of the liquid alkali storage tank 1 is connected to a feed pipe 8, which passes through the insulation sleeve 6. One end of the liquid alkali storage tank 1 is connected to a discharge pipe 9. Solenoid valves are installed at the ends of both the feed pipe 8 and the discharge pipe 9. The control unit is electrically connected to the solenoid valves to facilitate the control of the raw materials entering the liquid alkali storage tank 1 through the feed pipe 8 and the control of the materials in the liquid alkali storage tank 1 being discharged through the discharge pipe 9.

[0021] Working principle: Raw materials are fed into the liquid alkali storage tank 1 through the feed pipe 8 for storage. The inlet pipe 4 and outlet pipe 5 are connected to the water supply and return lines of the industrial circulating water system, respectively. The industrial circulating water enters the heat exchange coil 3 through the inlet pipe 4 and circulates in the heat exchange coil 3. It then returns to the industrial circulating water system through the outlet pipe 5. During the flow, the industrial circulating water transfers heat to the liquid alkali through the wall of the heat exchange coil 3, thereby maintaining the temperature of the liquid alkali above its crystallization temperature. At the same time, the temperature of the liquid alkali in the liquid alkali storage tank 1 is monitored in real time by the temperature sensor 7 and fed back to the control unit. The control unit compares the detected temperature value with the set threshold and controls the flow regulating valve of the industrial circulating water system in real time to adjust the flow rate of the industrial circulating water, thereby achieving on-demand heating. In addition, the insulation sleeve 6 on the outside of the liquid alkali storage tank 1 can reduce heat loss and reduce the heat load of the antifreeze device.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing freezing of liquid alkali in industrial circulating water during winter, comprising a liquid alkali storage tank (1), characterized in that: The inner wall of the liquid alkali storage tank (1) is provided with a jacket layer (2), and a circulating water heat exchange mechanism is provided inside the jacket layer (2). The circulating water heat exchange mechanism includes a heat exchange coil (3) provided inside the jacket layer (2). The inlet and outlet ends of the heat exchange coil (3) pass through the jacket layer (2) and extend to the outside of the liquid alkali storage tank (1), respectively connected to an inlet pipe (4) and an outlet pipe (5). The inlet pipe (4) is located on one side of the outlet pipe (5).

2. The antifreeze device for liquid alkali in industrial circulating water during winter according to claim 1, characterized in that: The heat exchange coils (3) are arranged in an "S"-shaped ring array in the jacket layer (2).

3. The antifreeze device for liquid alkali in industrial circulating water during winter according to claim 1, characterized in that: The inlet pipe (4) and outlet pipe (5) are respectively connected to the water supply pipeline and return pipeline of the industrial circulating water system.

4. The antifreeze device for liquid alkali in industrial circulating water during winter according to claim 1, characterized in that: The liquid alkali storage tank (1) is covered with an insulation sleeve (6).

5. A device for preventing liquid alkali from freezing in industrial circulating water during winter, as described in claim 1, characterized in that: A temperature sensor (7) is fixedly installed at the middle position of the inner side of one end of the liquid alkali storage tank (1). The temperature sensor (7) is electrically connected to the control unit, and the control unit is electrically connected to the flow regulating valve and the circulating pump of the industrial circulating water system.

6. A device for preventing liquid alkali from freezing in industrial circulating water during winter, as described in claim 1, is characterized in that: The top of the liquid alkali storage tank (1) is connected to a feed pipe (8), and the feed pipe (8) passes through the insulation sleeve (6). One end of the liquid alkali storage tank (1) is connected to a discharge pipe (9).

7. A device for preventing liquid alkali from freezing in industrial circulating water during winter, as described in claim 6, is characterized in that: Solenoid valves are installed at the ends of the feed pipe (8) and the discharge pipe (9).

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