A waste heat utilization device for chlor-alkali production system

Abstract

The utility model belongs to chlor alkali production technical field especially is a kind of chlor alkali production system waste heat utilization device. Including chlor alkali production box, the upper end surface of chlor alkali production box is provided with lid. The utility model can be saturated salt water in chlor alkali production box by the setting of waste heat recovery subassembly heat is sent to waste heat utilization subassembly in wind after heat conduction when electrolysis, to this inside saturated salt water of waste heat utilization subassembly is preheated, to avoid the heat generated in chlor alkali production box is reduced chlor alkali production box inside temperature by cold water, to affect the electrolysis efficiency of saturated salt water in chlor alkali production box, the setting of saturated salt water circulation subassembly is used to circulate saturated salt water in water storage tank and the saturated salt water heated in waste heat utilization subassembly, so not only can improve saturated salt water preheating quantity, but also can make saturated salt water in waste heat utilization subassembly evenly heated.

Description

Technical Field

[0001] This utility model relates to the field of chlor-alkali production technology, specifically to a waste heat utilization device for a chlor-alkali production system. Background Technology

[0002] The chlor-alkali production system refers to the chlor-alkali production industry, a method of producing chlorine, hydrogen, and caustic soda using saturated brine. By electrolyzing a saturated NaCl solution, NaOH, Cl₂, and H₂ can be produced. This method is widely used in industrial production, and a series of chemical products can be produced using this as raw material, hence the name chlor-alkali industry. The chlor-alkali industry is one of the most fundamental chemical industries, and its products are not only used in the chemical industry itself but also widely applied in light industry, textile industry, metallurgical industry, petrochemical industry, and public utilities. The temperature of the NaCl solution during electrolysis is generally between 60-80℃. The heat generated during NaCl electrolysis is usually transferred to the reaction tank, and the reaction tank then dissipates the heat into the air, resulting in heat loss. To improve heat utilization efficiency, waste heat recovery devices are usually installed to reuse the heat generated during chlor-alkali production.

[0003] Currently, common waste heat recovery devices in chlor-alkali production systems absorb heat from the chlor-alkali reaction tank by water cooling, using this heat to heat cold water, which is then utilized. While this method utilizes the heat generated during chlor-alkali production, the absorption of heat by the cold water also lowers the internal temperature of the reaction tank. Since the optimal temperature for chlor-alkali production is within a specified range, the decrease in the internal temperature of the reaction tank negatively impacts the efficiency of chlor-alkali production.

[0004] Therefore, we propose a waste heat utilization device for chlor-alkali production systems to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a waste heat utilization device for a chlor-alkali production system, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A waste heat utilization device for a chlor-alkali production system includes a chlor-alkali production tank, a tank cover is provided on the upper end face of the chlor-alkali production tank, a waste heat recovery component is provided on the outer wall of the chlor-alkali production tank, a waste heat utilization component is provided on one side of the waste heat recovery component, and a saturated brine circulation component is provided on one side of the waste heat utilization component.

[0010] The waste heat recovery component is used to heat the air by transferring heat energy from the inside of the chlor-alkali production tank. The heated air is then transported to the waste heat utilization component, where it preheats the saturated brine stored. The saturated brine circulation component is used to circulate the saturated brine stored inside the waste heat utilization component, making the saturated brine stored inside the waste heat utilization component fluid.

[0011] Furthermore, the waste heat recovery assembly includes a heat-conducting pipe sleeved on the outer wall of the chlor-alkali production tank and a fan fixedly installed on the upper end face of the chlor-alkali production tank. The tank cover has a slot, and the fan is inserted into the slot. A duct is fixedly installed on the lower end face of the fan, and one end of the duct is fixedly connected to the heat-conducting pipe.

[0012] Furthermore, the waste heat utilization component includes a waste heat recovery box disposed on one side of the chlor-alkali production box, a first cover plate is fixedly disposed on the upper end surface of the waste heat recovery box, and a support plate is fixedly disposed on the inner side of the waste heat recovery box.

[0013] Furthermore, a first circulating water pipe is fixedly installed on the upper end surface of the support plate, a plurality of supporting water pipes are fixedly installed on the upper end surface of the first circulating water pipe, and a second circulating water pipe is fixedly installed at the top end of the plurality of supporting water pipes.

[0014] Furthermore, the saturated brine circulation assembly includes a water storage tank disposed on one side of the waste heat recovery tank. A second cover plate is disposed on the upper end surface of the water storage tank. A water pump is disposed between the water storage tank and the waste heat recovery tank. Two first connecting water pipes are fixedly disposed on the water pump. The two first connecting water pipes are respectively connected to the water storage tank and a first circulating water pipe disposed inside the waste heat recovery tank.

[0015] Furthermore, a third circulating water pipe is fixedly installed on the water storage tank, and the end of the third circulating water pipe away from the water storage tank is connected to the second circulating water pipe inside the waste heat recovery tank.

[0016] Furthermore, a vent valve is fixedly installed on the upper end face of the first cover plate, a water outlet pipe is fixedly installed on the water storage tank, and a control valve is fixedly installed on the water outlet pipe.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a waste heat utilization device for a chlor-alkali production system, which has the following beneficial effects:

[0019] This invention utilizes a waste heat recovery component to transfer the heat generated during the electrolysis of saturated brine in the chlor-alkali production tank to the waste heat utilization component via heat conduction. This preheats the saturated brine inside the waste heat utilization component, preventing the heat generated inside the chlor-alkali production tank from being reduced by cold water, which would affect the electrolysis efficiency of the saturated brine. A saturated brine circulation component circulates the saturated brine in the storage tank with the heated saturated brine in the waste heat utilization component. This not only increases the preheating amount of the saturated brine but also ensures more uniform heating of the saturated brine within the waste heat utilization component. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a perspective view of the waste heat recovery component of this utility model;

[0022] Figure 3 This is a cross-sectional view of the waste heat utilization component of this utility model;

[0023] Figure 4 This is a perspective view of the saturated brine circulation component of this utility model.

[0024] In the diagram: 1. Chlor-alkali production tank; 2. Tank cover; 3. Waste heat recovery assembly; 301. Heat pipe; 302. Fan; 303. Air duct; 4. Waste heat utilization assembly; 401. Waste heat recovery tank; 402. First cover plate; 403. Support plate; 404. First circulating water pipe; 405. Supporting water pipe; 406. Second circulating water pipe; 5. Saturated brine circulation assembly; 501. Water storage tank; 502. Second cover plate; 503. Water pump; 504. First connecting water pipe; 505. Second circulating water pipe; 6. Vent valve; 7. Outlet pipe; 8. Control valve. Detailed Implementation

[0025] 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.

[0026] Example

[0027] like Figures 1-4As shown, an embodiment of the present invention provides a waste heat utilization device for a chlor-alkali production system, including a chlor-alkali production tank 1, a tank cover 2 provided on the upper end surface of the chlor-alkali production tank 1, a waste heat recovery component 3 provided on the outer wall surface of the chlor-alkali production tank 1, a waste heat utilization component 4 provided on one side of the waste heat recovery component 3, and a saturated brine circulation component 5 provided on one side of the waste heat utilization component 4.

[0028] The waste heat recovery component 3 is used to heat the air by transferring the heat energy inside the chlor-alkali production tank 1. The heated air is then transported to the waste heat utilization component 4. The heated air preheats the saturated brine stored in the waste heat utilization component 4. The saturated brine circulation component 5 is used to circulate the saturated brine stored inside the waste heat utilization component 4, and to make the saturated brine stored inside the waste heat utilization component 4 fluid.

[0029] like Figure 2 As shown, the waste heat recovery assembly 3 includes a heat-conducting pipe 301 sleeved on the outer wall of the chlor-alkali production tank 1 and a fan 302 fixedly installed on the upper end face of the chlor-alkali production tank 1. The tank cover 2 has a slot, and the fan 302 is inserted into the slot. A duct 303 is fixedly installed on the lower end face of the fan 302, and one end of the duct 303 is fixedly connected to the heat-conducting pipe 301.

[0030] By setting up the waste heat recovery component 3, the heat generated during the electrolysis of saturated brine in the chlor-alkali production tank 1 can be transferred to the heat pipe 301. The heat pipe 301 is heated, and the heat on the heated heat pipe 301 is blown into the waste heat utilization component 4 by the fan 302, and the saturated brine inside the waste heat utilization component 4 is preheated.

[0031] like Figure 3 As shown, the waste heat utilization component 4 includes a waste heat recovery tank 401 disposed on one side of the chlor-alkali production tank 1. A first cover plate 402 is fixedly disposed on the upper surface of the waste heat recovery tank 401, and a support plate 403 is fixedly disposed on the inner side of the waste heat recovery tank 401. A first circulating water pipe 404 is fixedly disposed on the upper surface of the support plate 403, and a plurality of support water pipes 405 are fixedly disposed on the upper surface of the first circulating water pipe 404. A second circulating water pipe 406 is fixedly disposed at the top end of the plurality of support water pipes 405. The first circulating water pipe 404, the support water pipes 405, and the second circulating water pipes 406 are used to store saturated brine to be electrolyzed.

[0032] By setting up the waste heat utilization component 4, the hot air delivered to its interior can heat the saturated brine in the first circulating water pipe 404, the support water pipe 405, and the second circulating water pipe 406, thereby preheating the saturated brine.

[0033] like Figure 4 As shown, the saturated brine circulation assembly 5 includes a water storage tank 501 disposed on one side of the waste heat recovery tank 401. A second cover plate 502 is provided on the upper surface of the water storage tank 501. A water pump 503 is disposed between the water storage tank 501 and the waste heat recovery tank 401. Two first connecting water pipes 504 are fixedly disposed on the water pump 503, and the two first connecting water pipes 504 are respectively connected to the water storage tank 501 and a first circulating water pipe 404 disposed inside the waste heat recovery tank 401. A third circulating water pipe 505 is fixedly disposed on the water storage tank 501, and the end of the third circulating water pipe 505 away from the water storage tank 501 is connected to a second circulating water pipe 406 disposed inside the waste heat recovery tank 401.

[0034] The saturated brine circulation component 5 is used to circulate the saturated brine in the water storage tank 501 and the heated saturated brine in the first circulation pipe 404, the support pipe 405, and the second circulation pipe 406. This not only increases the preheating amount of the saturated brine, but also ensures that the saturated brine in the first circulation pipe 404, the support pipe 405, and the second circulation pipe 406 is heated evenly.

[0035] like Figure 1 As shown, a vent valve 6 is fixedly installed on the upper end face of the first cover plate 402, a water outlet pipe 7 is fixedly installed on the water storage tank 501, and a control valve 8 is fixedly installed on the water outlet pipe 7.

[0036] The vent valve 6 is used to release excess hot air collected in the waste heat recovery box 401, and the water outlet pipe 7 and control valve 8 are used to discharge saturated brine from the water storage tank 501.

[0037] The working principle of this practical application is as follows:

[0038] When the saturated brine in the chlor-alkali production tank 1 undergoes electrolysis, the heat pipe 301 conducts heat from the inside of the chlor-alkali production tank 1, thereby heating the heat pipe 301. The fan 302 and water pump 503 are activated. The fan 302 delivers outside air through the duct 303 to the heat pipe 301. The air delivered to the heat pipe 301 transfers the heat from the heat pipe 301 to the waste heat recovery tank 401. The hot air delivered to the waste heat recovery tank 401 then circulates through the first circulating water pipe. The saturated brine in the second circulating water pipe 404, the support water pipe 405, and the second circulating water pipe 406 is heated. The start of the water pump 503 transports the saturated brine in the water storage tank 501 to the first circulating water pipe 404 through the first connecting water pipe 504. At this time, the heated saturated brine in the second circulating water pipe 406, the support water pipe 405, and the first circulating water pipe 404 will be transported to the water storage tank 501 in sequence. This process is repeated so that the saturated brine in the water storage tank 501 can be circulated and heated.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waste heat utilization device for a chlor-alkali production system, comprising a chlor-alkali production tank (1), wherein a tank cover (2) is provided on the upper end face of the chlor-alkali production tank (1), characterized in that: The outer wall of the chlor-alkali production tank (1) is provided with a waste heat recovery component (3), a waste heat utilization component (4) is provided on one side of the waste heat recovery component (3), and a saturated brine circulation component (5) is provided on one side of the waste heat utilization component (4). The waste heat recovery component (3) is used to heat the air by transferring the heat energy inside the chlor-alkali production tank (1). The heated air is transported to the waste heat utilization component (4). The heated air preheats the saturated brine stored in the waste heat utilization component (4). The saturated brine circulation component (5) is used to circulate the saturated brine stored inside the waste heat utilization component (4) and make the saturated brine stored inside the waste heat utilization component (4) fluid.

2. The waste heat utilization device for a chlor-alkali production system according to claim 1, characterized in that: The waste heat recovery assembly (3) includes a heat-conducting pipe (301) sleeved on the outer wall of the chlor-alkali production tank (1) and a fan (302) fixedly installed on the upper end face of the chlor-alkali production tank (1). The tank cover (2) has a slot, and the fan (302) is inserted into the slot. A duct (303) is fixedly installed on the lower end face of the fan (302), and one end of the duct (303) is fixedly connected to the heat-conducting pipe (301).

3. The waste heat utilization device for a chlor-alkali production system according to claim 1, characterized in that: The waste heat utilization component (4) includes a waste heat recovery box (401) disposed on one side of the chlor-alkali production box (1). A first cover plate (402) is fixedly disposed on the upper end surface of the waste heat recovery box (401), and a support plate (403) is fixedly disposed on the inner side of the waste heat recovery box (401).

4. The waste heat utilization device for a chlor-alkali production system according to claim 3, characterized in that: A first circulating water pipe (404) is fixedly installed on the upper end surface of the support plate (403), and a plurality of supporting water pipes (405) are fixedly installed on the upper end surface of the first circulating water pipe (404). A second circulating water pipe (406) is fixedly installed at the top end of the plurality of supporting water pipes (405).

5. The waste heat utilization device for a chlor-alkali production system according to claim 4, characterized in that: The saturated brine circulation assembly (5) includes a water storage tank (501) disposed on one side of the waste heat recovery tank (401). A second cover plate (502) is provided on the upper end surface of the water storage tank (501). A water pump (503) is disposed between the water storage tank (501) and the waste heat recovery tank (401). Two first connecting water pipes (504) are fixedly disposed on the water pump (503). The two first connecting water pipes (504) are respectively connected to the water storage tank (501) and the first circulating water pipe (404) disposed inside the waste heat recovery tank (401).

6. The waste heat utilization device for a chlor-alkali production system according to claim 5, characterized in that: A third circulating water pipe (505) is fixedly installed on the water storage tank (501), and the end of the third circulating water pipe (505) away from the water storage tank (501) is connected to the second circulating water pipe (406) inside the waste heat recovery tank (401).

7. A waste heat utilization device for a chlor-alkali production system according to claim 5, characterized in that: An air vent valve (6) is fixedly installed on the upper surface of the first cover plate (402), a water outlet pipe (7) is fixedly installed on the water storage tank (501), and a control valve (8) is fixedly installed on the water outlet pipe (7).

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