Prolonged chlor-alkali environmental absorption device secondary sodium fan

Abstract

The utility model discloses a prolonging chlor alkali environmental protection absorption device secondary sodium fan belongs to chlor alkali chemical industry secondary sodium environmental protection absorption device secondary sodium fan long -period stable operation technical field, mainly solved the secondary sodium system long -period in prior art negative pressure operation state, in the operation process, secondary sodium fan will secondary sodium tower lye fog draw to the fan volute, lead to the scale formation in fan volute, fan impeller damage, and cannot normally operate, tail gas absorption effect is poor, this secondary sodium fan includes first secondary sodium fan and second secondary sodium fan, and the input of first secondary sodium fan and second secondary sodium fan is connected with the shunt pipe, and one end of two shunt pipes is connected with the discharge pipe, and one end of discharge pipe is provided with filter shell, and the detachable silk screen trap is arranged in filter shell, and the flush water pipe is arranged through filter shell, and a plurality of spray discs are installed on the surface of flush water pipe, a plurality of spray nozzles are arranged at the bottom of spray disc, and the control valve is installed on the surface of flush water pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of long-term stable operation of sodium hypochlorite fan in chlor-alkali environmental protection absorption devices, and more specifically, to a sodium hypochlorite fan for extending the operation of chlor-alkali environmental protection absorption devices. Background Technology

[0002] Chlorine is a highly toxic gas that can cause asphyxiation. In the chlor-alkali production process, a certain amount of waste chlorine and chlorine-containing waste gas is inevitably generated, especially during start-up and shutdown. This chlorine-containing gas has always been a major safety and environmental hazard for chlor-alkali enterprises. This chlorine gas needs to be absorbed and treated with alkaline solution. Therefore, under the full consideration of safety and environmental protection, a sodium hypochlorite production system is designed for chlor-alkali plants. The system uses alkaline solution to circulate and absorb waste chlorine gas in a waste chlorine gas absorption tower, which is an environmentally friendly device that can prevent a large amount of chlorine gas from escaping.

[0003] However, existing sodium hypochlorite production systems vary widely. For example, invention patent CN110255504A relates to a continuous tower-type sodium hypochlorite production system and process. This system includes a sodium hypochlorite reaction unit and a tail chlorine absorption unit. The sodium hypochlorite reaction unit includes a sodium hypochlorite reaction tower, a sodium hypochlorite circulation tank, a sodium hypochlorite circulation pump, and a sodium hypochlorite cooler connected in sequence. The tail chlorine absorption unit includes a tail chlorine absorption tower, an alkali circulation tank, an alkali circulation pump, and an alkali cooler connected in sequence. The sodium hypochlorite cooler is connected to the upper part of the sodium hypochlorite reaction tower, which is also connected to a chlorine gas pipeline and an ORP detector. The alkali cooler is connected to the upper part of the tail chlorine absorption tower, and the top of the sodium hypochlorite reaction tower is connected to the lower part of the tail chlorine absorption tower. This invention introduces an online ORP detection instrument to ensure that the sodium hypochlorite produced by the system meets product quality requirements. This invention has the advantages of low energy consumption, high efficiency, high quality, and continuous and stable production.

[0004] Although the system can produce sodium hypochlorite that meets product quality requirements and achieves continuous and stable production, the sodium hypochlorite system of the chlor-alkali environmental protection absorption device operates under negative pressure for a long period of time. During operation, the sodium hypochlorite evacuation fan will draw the alkaline mist of the sodium hypochlorite tower circulating liquid into the fan casing, causing scaling inside the fan casing and damage to the fan impeller, thus preventing normal operation. This seriously affects the absorption effect of sodium hypochlorite tail gas, and the frequency is relatively high. In order to avoid this phenomenon, it is necessary to design a way to extend the operation of the sodium hypochlorite fan in the chlor-alkali environmental protection absorption device. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To achieve the above objectives, this utility model provides a sodium hypochlorite blower for an extended chlor-alkali environmental protection absorption device, achieved through the following specific technical means: A sodium absorption fan for an extended chlor-alkali environmental protection absorption device includes a primary sodium fan and a secondary sodium fan. Both the primary and secondary sodium fans have input pipes connected to a splitter pipe, and the two fans are connected in parallel via the splitter pipes. One end of each splitter pipe is connected to a discharge pipe, and one end of the discharge pipe is fitted with a filter housing. A detachable wire mesh collector is installed inside the filter housing. A flushing water pipe runs through the filter housing and is located above the wire mesh collector. Multiple spray plates are installed on the surface of the flushing water pipe, and several spray nozzles are located at the bottom of the spray plates. A control valve is installed on the surface of the flushing water pipe and is located outside the filter housing.

[0007] Preferably, one end of the flushing water pipe is connected to the output end of the water pump, the input end of the water pump is connected to a suction pipe, and one end of the suction pipe can be connected to the water supply equipment, or river water can be directly introduced into the suction pipe.

[0008] Preferably, the bottom of the filter housing is connected to an outlet pipe, and the end of the outlet pipe away from the filter housing is connected to an absorption tail tower. The absorption tail tower is used to absorb the introduced chlorine gas, and the outlet pipe is located at the gas phase outlet at the top of the absorption tail tower.

[0009] Preferably, a fixing member is provided at one end of the flushing water pipe that extends into the filter housing, and the end of the fixing member is fixed to the inner wall of the filter housing.

[0010] Preferably, a liquid distributor is installed inside the absorption tail tower, and the liquid distributor is located below the gas outlet pipe.

[0011] Preferably, the absorption tail tower is connected to a reaction mechanism, which includes a sodium hypochlorite storage tank, a circulating pump, and a plate cooler. The lower part of the absorption tail tower is connected to the sodium hypochlorite storage tank through a liquid delivery pipe. The sodium hypochlorite storage tank is connected to the input end of the circulating pump through a flow pipe. The output end of the circulating pump is connected to the input end of the plate cooler through a guide pipe. The output end of the plate cooler is connected to a liquid distributor through a return pipe.

[0012] Preferably, the output ends of both the first sodium blower and the second sodium blower are connected to outlet pipes. After the exhaust gas is completely absorbed by the first sodium blower and the second sodium blower, it enters the outlet pipe through the discharge pipe and is discharged to the outside, so as to achieve the purpose of safe discharge.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This invention can intercept and filter out the alkaline mist carried out and has an online flushing function, which can reduce the alkaline mist content in the volute of the sodium hypochlorite blower, thereby extending the online operation cycle of the sodium hypochlorite blower and ensuring the stable operation of the sodium hypochlorite blower and system. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 The diagram shows the structure of the first and second sodium blowers. Figure 3 This is a schematic diagram of the filter housing and wire mesh collector. Figure 4 This is a schematic diagram of the flushing water pipeline. Figure 5 This is a schematic diagram of the structure for recycling alkali solution.

[0015] In the diagram: 1. First sodium blower; 2. Second sodium blower; 3. Diverter pipe; 4. Discharge pipe; 5. Filter housing; 6. Wire mesh collector; 7. Absorption tail tower; 8. Gas outlet pipe; 9. Fixture; 10. Flushing water pipe; 11. Spray tray; 12. Spray nozzle; 13. Control valve; 14. Water pump; 15. Suction pipe; 16. Sodium secondary storage tank; 17. Infusion pipe; 18. Circulation pump; 19. Flow pipe; 20. Plate cooler; 21. Guide pipe; 22. Return pipe; 23. Liquid distributor; 24. Outlet pipe. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0019] like Figure 1 , Figure 3 as well as Figure 4As shown, this is a schematic diagram of the structure of the sodium-ion fan in the extended chlor-alkali environmental protection absorption device in this embodiment. The sodium-ion fan in this embodiment includes a primary sodium-ion fan 1 and a secondary sodium-ion fan 2. The input ends of both the primary sodium-ion fan 1 and the secondary sodium-ion fan 2 are connected to a diversion pipe 3. The two fans are connected in parallel through the diversion pipe 3. One end of each diversion pipe 3 is connected to a discharge pipe 4. A filter housing 5 is installed at one end of the discharge pipe 4. A wire mesh collector 6 is detachably installed inside the filter housing 5. A flushing water pipe 10 is installed through the filter housing 5. Located above the wire mesh trap 6, the flushing water pipe 10 has multiple spray plates 11 mounted on its surface, with several spray nozzles 12 at the bottom of each spray plate 11. A control valve 13 is mounted on the surface of the flushing water pipe 10, located outside the filter housing 5. One end of the flushing water pipe 10 is connected to the output end of a water pump 14, and the input end of the water pump 14 is connected to a suction pipe 15. One end of the suction pipe 15 can be connected to a water supply device, or river water can be directly introduced into the suction pipe 15. After the sodium hypochlorite blower completely absorbs the chlorine gas... During the process of safely discharging the exhaust gas directly to the outside, the purified exhaust gas will carry away the alkaline mist generated by the circulating alkaline solution. This alkaline mist will then be discharged from the gas phase outlet at the top of the tower and guided through a pipe into the filter housing 5. At this point, utilizing the characteristics of the installed wire mesh collector 6, since the alkaline mist is a mist-like substance formed by sodium hydroxide droplets, the droplets carried in the exhaust gas are intercepted, thus filtering out the carried-out alkaline mist. The purified exhaust gas is then discharged outwards through the discharge pipe 4 by two secondary sodium blowers, thus preventing the alkaline mist from entering the exhaust gas. To prevent scaling and impeller damage within the volute of the sodium hypochlorite blower, the alkaline mist content inside the volute is reduced, ensuring stable operation of the blower and system. Simultaneously, at a fixed time each week, the water pump 14 is started to supply water to the flushing water pipe 10. The control valve 13 is opened, and the wire mesh collector 6 is flushed online via the spray plate 11 and spray nozzles 12 installed on the flushing water pipe 10. Alkaline droplets are directly recycled back to the absorption tower with the flushing liquid for reuse.

[0020] like Figure 3 As shown, this is a schematic diagram of the structure of the filter housing 5 and the gas outlet pipe 8 in this embodiment. In this embodiment, the bottom of the filter housing 5 is connected to the gas outlet pipe 8, and the end of the gas outlet pipe 8 away from the filter housing 5 is connected to the absorption tail tower 7. The absorption tail tower 7 can be used to absorb the introduced chlorine gas. The gas outlet pipe 8 is located at the gas phase outlet at the top of the absorption tail tower 7. The end of the flushing water pipe 10 that extends into the filter housing 5 is provided with a fixing member 9, and the end of the fixing member 9 is fixed to the inner wall of the filter housing 5.

[0021] like Figure 5As shown, this is a schematic diagram of the reaction mechanism in this embodiment. In this embodiment, the lower part of the absorption tail tower 7 is connected to the sodium hypochlorite storage tank 16 through the liquid delivery pipe 17. The sodium hypochlorite storage tank 16 is connected to the input end of the circulation pump 18 through the flow pipe 19. The output end of the circulation pump 18 is connected to the input end of the plate cooler 20 through the guide pipe 21. A liquid distributor 23 is provided inside the absorption tail tower 7, and the liquid distributor 23 is located below the gas outlet pipe 8. The output end of the plate cooler 20 is connected to the liquid distributor 23 through the return pipe 22. Unreacted chlorine-containing tail gas comes into countercurrent contact with the circulating alkaline solution in the packed section of the absorption tail tower 7, reacting to generate sodium hypochlorite. The sodium hypochlorite solution can be introduced into the sodium hypochlorite storage tank 16 through the liquid delivery pipe 17 at the bottom of the absorption tail tower 7. Then, the sodium hypochlorite solution in the sodium hypochlorite storage tank 16 is lifted to the plate cooler 20 through the guide pipe 21 by the circulating pump 18 to cool the sodium hypochlorite solution. Finally, the solution is transported to the liquid distributor 23 at the top of the tower through the return pipe 22. After separation, an alkaline solution is formed and continues to be recycled.

[0022] It is worth noting that in this embodiment, the sodium hypochlorite storage tank 16, the circulating pump 18, and the plate cooler 20 constitute a reaction mechanism, which is used to continue the reaction of unabsorbed chlorine gas and sodium hydroxide.

[0023] like Figure 2 As shown, in this embodiment, the output ends of the first sodium blower 1 and the second sodium blower 2 are both connected to the outlet pipe 24. After the exhaust gas is completely absorbed by the first sodium blower 1 and the second sodium blower 2, it enters the outlet pipe 24 through the discharge pipe 4 and is discharged outward to achieve the purpose of safe discharge.

[0024] 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 sodium-ion fan for an extended chlor-alkali environmental absorption device, comprising a primary sodium-ion fan (1) and a secondary sodium-ion fan (2), wherein the input ends of both the primary sodium-ion fan (1) and the secondary sodium-ion fan (2) are connected to a shunt pipe (3), the two fans are connected in parallel through the shunt pipe (3), and one end of each shunt pipe (3) is connected to an exhaust pipe (4), characterized in that: A filter housing (5) is provided at one end of the discharge pipe (4). A wire mesh trap (6) is detachably installed inside the filter housing (5). A flushing water pipe (10) is provided through the filter housing (5), and the flushing water pipe (10) is located above the wire mesh trap (6). Multiple spray plates (11) are installed on the surface of the flushing water pipe (10). Several spray nozzles (12) are provided at the bottom of the spray plates (11). A control valve (13) is installed on the surface of the flushing water pipe (10), and the control valve (13) is located outside the filter housing (5).

2. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 1, characterized in that: One end of the flushing water pipe (10) is connected to the output end of the water pump (14), and the input end of the water pump (14) is connected to the suction pipe (15). One end of the suction pipe (15) can be connected to the water supply equipment, or the river water can be directly fed into the suction pipe (15).

3. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 1, characterized in that: The bottom of the filter housing (5) is connected to the gas outlet pipe (8), and the end of the gas outlet pipe (8) away from the filter housing (5) is connected to the absorption tail tower (7). The absorption tail tower (7) is used to absorb the introduced chlorine gas. The gas outlet pipe (8) is located at the gas phase outlet at the top of the absorption tail tower (7).

4. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 1, characterized in that: The end of the flushing water pipe (10) extending into the filter housing (5) is provided with a fixing member (9), and the end of the fixing member (9) is fixed to the inner wall of the filter housing (5).

5. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 3, characterized in that: The absorption tail tower (7) is equipped with a liquid distributor (23), and the liquid distributor (23) is located below the gas outlet pipe (8).

6. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 3, characterized in that: The absorption tail tower (7) is connected to a reaction mechanism, which includes a sodium hypochlorite storage tank (16), a circulation pump (18), and a plate cooler (20). The lower part of the absorption tail tower (7) is connected to the sodium hypochlorite storage tank (16) through a liquid delivery pipe (17). The sodium hypochlorite storage tank (16) is connected to the input end of the circulation pump (18) through a flow pipe (19). The output end of the circulation pump (18) is connected to the input end of the plate cooler (20) through a guide pipe (21). The output end of the plate cooler (20) is connected to the liquid distributor (23) through a return pipe (22).

7. The sodium-ion fan for an extended chlor-alkali environmental protection absorption device according to claim 1, characterized in that: Both the first sodium blower (1) and the second sodium blower (2) are connected to an outlet pipe (24). After the chlorine gas is completely absorbed, the exhaust gas passes through the first sodium blower (1) and the second sodium blower (2) and enters the outlet pipe (24) through the discharge pipe (4) to be discharged outward, so as to achieve the purpose of safe discharge.

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