Sodium hypochlorite reaction tower

Abstract

The utility model relates to a sodium hypochlorite reaction tower which is characterized in that a groove type liquid distributor, a jet type filler supporting plate and a section of filler area are arranged, an alkali liquor inlet is communicated to the filler area through the groove type liquid distributor, the filler area is communicated to a chlorine area through the jet type filler supporting plate, and the chlorine area is separated from the alkali liquor area through a partition plate. The sodium hypochlorite production is more efficient and safer, and the quality of the sodium hypochlorite product is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of sodium hypochlorite production, in particular to a sodium hypochlorite reaction tower. Background Art

[0002] As one of the products of chlor-alkali industry production, sodium hypochlorite production is actually a branch of the chlor-alkali industry. It is obtained by the reaction of sodium hydroxide solution and chlorine gas. There are two production methods: intermittent method and continuous method. In the production of chlor-alkali chemical enterprises, chlorine gas is sent to the liquid chlorine section to produce liquid chlorine, and the tail gas of chlorine gas in the liquid chlorine section is sent into the sodium hypochlorite reaction tower to be absorbed by sodium hydroxide solution. The packing support plate of the sodium hypochlorite reaction tower directly opens holes on the plane of the support plate. During use, the broken packing will block the holes, resulting in an increase in the pressure difference of the reaction tower and a decrease in the absorption capacity of the sodium hypochlorite reaction tower. The lye spraying device is directly opened on the PVC pipe. After deviation occurs during use, the liquid spraying is uneven, forming a phenomenon of uneven flow. Chlorine gas and lye cannot effectively contact and react. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a sodium hypochlorite reaction tower to overcome the deficiencies of the prior art. By setting a trough-type liquid distributor, a jet-type packing support plate and a section of packing area, the production of sodium hypochlorite is made more efficient and safe, and at the same time, the quality of sodium hypochlorite products is more stable.

[0004] A sodium hypochlorite reaction tower proposed according to the utility model includes a tower body, a trough-type liquid distributor, a packing area, a jet-type packing support plate, a chlorine gas area, a partition plate and a lye area. The trough-type liquid distributor, the packing area, the jet-type packing support plate, the chlorine gas area, the partition plate and the lye area are arranged from top to bottom in the tower body. There is a lye feed pipe above the weir-type liquid distributor. The packing area is provided with a packing inlet and a packing outlet. The chlorine gas area is provided with a chlorine gas inlet. Chlorine gas enters the tower body through a PVDF gas distributor. There is a section of waste gas outlet pipe at the top of the tower body, and a fan is arranged on the waste gas outlet pipe. The chlorine gas area and the lye area are connected through a liquid pipeline, and the lye area is provided with a discharge pipe.

[0005] Preferably, the lye inlet is connected to the packing area through a trough-type liquid distributor, the packing area is connected to the chlorine gas area through a jet-type packing support plate, and the chlorine gas area and the lye area are separated by a partition plate.

[0006] Preferably, a conductivity meter is arranged on the liquid pipeline.

[0007] Preferably, a mixer is arranged on the lye feed pipe.

[0008] Preferably, a pump and a cooler are arranged on the discharge pipe.

[0009] Preferably, the discharge pipe and the lye feed pipe are connected to form a circulation pipeline.

[0010] Preferably, the lye in the lye feed pipe comes from a sodium hydroxide solution storage tank, and a first automatic valve is provided on the pipeline from the sodium hydroxide solution storage tank to the lye feed pipe.

[0011] Preferably, a part of the sodium hypochlorite solution in the discharge pipe is transported to a sodium hypochlorite solution finished product storage tank, and a second automatic valve is provided on the pipeline from the discharge pipe to the sodium hypochlorite solution finished product storage tank.

[0012] Preferably, the trough-type liquid distributor includes several rows of spray plates, and continuous toothed spray troughs are provided on the spray plates.

[0013] Preferably, the jet-type packing support plate is a corrugated jet-type packing support plate, which includes side plates and corrugated perforated plates.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The two-stage packing zone in the prior art is optimized into a single-stage packing zone. By setting the single-stage packing zone, the resistance of the sodium hypochlorite reaction tower can be reduced.

[0016] 2. By setting the jet-type packing support plate, the opening ratio of this type of support plate is not limited by the tower cross-section, and the opening ratio can be greater than 100%. The gas-liquid is shunted through the support plate, with low pressure drop, good rigidity, large throughput and strong load-bearing capacity, increasing the passing rate of the support plate.

[0017] 3. By setting the trough-type liquid distributor, continuous toothed spray troughs are provided on the trough-type liquid distributor. The deviation of a single spray trough is small, not affected by pressure changes, the flow rate between distribution points is uniform, the spraying is more uniform and efficient, and at the same time, it has good anti-blocking performance, sufficient air flow channels, and is simple and compact in structure. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a sodium hypochlorite reaction tower proposed by the present utility model.

[0019] Figure 2 is a schematic structural diagram of the trough-type liquid distributor proposed by the present utility model.

[0020] Figure 3 is Figure 2 the sectional view taken along the A-A plane of

[0021] Figure 4 is a schematic structural diagram of the jet-type packing support plate proposed by the present utility model.

[0022] Figure 5 is Figure 4 the sectional view taken along the B-B plane of

[0023] Illustration: 1. Tower body; 2. Trough liquid distributor; 2-1. Spray plate; 3. Packing area; 3-1. Side plate; 3-2. Corrugated perforated plate; 4. Jet packing support plate; 5. Baffle; 6. Alkali solution area; 7. Alkali solution feed pipe; 8. Packing inlet; 9. Packing outlet; 10. PVDF gas distributor; 11. Exhaust gas outlet pipe; 12. Fan; 13. Feed liquid pipe; 14. Discharge pipe; 15. Conductivity meter; 16. Mixer; 17. Pump; 18. Cooler; 19. Sodium hydroxide solution storage tank; 20. First automatic valve; 21. Sodium hypochlorite solution finished product storage tank; 22. Second automatic valve. Detailed implementation manners

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following further describes in detail the detailed implementation manners of the present utility model with reference to the accompanying drawings and embodiments.

[0025] In the description of the present utility model, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In the present utility model, unless otherwise clearly specified and limited, if there are terms such as "installation", "connection", "connection", "fixation", etc., these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical signal connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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.

[0027] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the present invention are only for illustrative purposes and do not represent the only implementation mode.

[0028] Referring to Figure 1 , Figure 1 , which shows a schematic structural diagram of a sodium hypochlorite reaction tower in an embodiment of the present invention. The sodium hypochlorite reaction tower provided by an embodiment of the present invention includes a tower body 1, a trough-type liquid distributor 2, a packing area 3, a jet-type packing support plate 4, a chlorine gas area, a partition plate 5 and a lye area 6. The trough-type liquid distributor 2, the packing area 3, the jet-type packing support plate 4, the chlorine gas area, the partition plate 5 and the lye area 6 are arranged in the tower body 1 from top to bottom. An alkali liquor feed pipe 7 is provided above the trough-type liquid distributor 2. The packing area 3 is provided with a packing inlet 8 and a packing outlet 9. The chlorine gas area is provided with a chlorine gas inlet. Chlorine gas enters the tower body 1 through a PVDF gas distributor 10. A section of waste gas outlet pipe 11 is arranged at the top of the tower body 1, and a fan 12 is arranged on the waste gas outlet pipe 11. The chlorine gas area and the lye area 6 are communicated through a liquid material pipe 13, and the lye area 6 is provided with a discharge pipe 14.

[0029] In one embodiment, further, the alkali liquor in the alkali liquor feed pipe 7 is communicated to the packing area 3 through the trough-type liquid distributor 2. The packing area 3 is communicated to the chlorine gas area through the jet-type packing support plate 4. The chlorine gas area and the lye area 6 are separated by the partition plate 5.

[0030] In one embodiment, further, a conductivity meter 15 is arranged on the liquid material pipe 13. By arranging the conductivity meter 15, the alkali content of the reaction liquid can be quickly detected.

[0031] In one embodiment, further, a mixer 16 is arranged on the alkali liquor feed pipe 7. By arranging the mixer, the supplemented fresh alkali liquor and the circulating liquid can be evenly mixed.

[0032] In one embodiment, further, a pump 17 and a cooler 18 are arranged on the discharge pipe 14. The pump 17 pumps out the sodium hypochlorite solution and sends it to the sodium hypochlorite solution finished product storage tank 21. Before being sent to the sodium hypochlorite solution finished product storage tank 21, it passes through the cooler 18. By arranging the cooler 18, the reaction heat generated during the reaction of the alkali solution and chlorine gas can be removed.

[0033] In one embodiment, further, the discharge pipe 14 and the alkali liquor feed pipe 7 are communicated to form a circulation pipeline.

[0034] In one embodiment, further, the lye in the lye feed pipe 7 comes from the sodium hydroxide solution storage tank 19, and a first automatic valve 20 is provided on the pipeline from the sodium hydroxide solution storage tank 19 to the lye feed pipe 7.

[0035] In one embodiment, further, a part of the sodium hypochlorite solution in the discharge pipe 14 is transported to the sodium hypochlorite solution finished product storage tank 21, and a second automatic valve 22 is provided on the pipeline from the discharge pipe 14 to the sodium hypochlorite solution finished product storage tank 21.

[0036] In one embodiment, further, the tray liquid distributor 2 includes several rows of spray plates 2-1, and continuous tooth-shaped spray troughs are provided on the spray plates 2-1. When installed on site, a horizontal pipe is used to adjust the levelness of each spray plate to ensure that the deviation of a single spray trough is less than or equal to 2 mm. This kind of setting makes the flow distribution between distribution points uniform, has sufficient air flow channels, and has a simple and compact structure.

[0037] In one embodiment, further, the jet packing support plate 4 is a corrugated jet packing support plate, which includes side plates 3-1 and corrugated perforated plates 3-2. The corrugated jet packing support plate has a three-dimensional structure, and the hole opening rate is not limited by the tower cross-section. The hole opening rate of the jet packing support plate is greater than 100%, while the hole opening rate of the traditional grid plate is generally 60%. The jet packing support plate has a lower pressure drop, a larger throughput, and a stronger load-bearing capacity.

[0038] The utility model sets the structure of directly opening holes on the plane of the traditional packing support plate into a jet packing support plate to prevent the packing from blocking the holes, and sets the hole-type spraying device of the lye into a tray liquid distributor to realize the effective contact reaction between chlorine gas and lye. First, the 18% sodium hydroxide solution enters the sodium hypochlorite reaction tower from the sodium hydroxide solution storage tank 19 through the first automatic valve 20 and the mixer 16. After the sodium hydroxide solution is transported to the upper end of the sodium hypochlorite reaction tower, it successively passes through the tray liquid distributor 2, the packing zone 3, and the jet packing support plate 4. After reaching the chlorine gas zone, it reacts with chlorine gas, and then enters the lye zone 6 through the liquid pipeline 13. An outlet is provided in the lye zone 6. The pump 17 outside the sodium hypochlorite reaction tower pumps out the sodium hypochlorite solution in the lye zone. After passing through the cooler 18, a part is transported to the sodium hypochlorite solution finished product storage tank 21 through the second automatic valve 22, and the other part is transported to the lye inlet at the upper end of the sodium hypochlorite reaction tower through the mixer 16. A waste gas outlet pipeline 11 is provided at the top of the sodium hypochlorite reaction tower, and the unreacted chlorine gas is discharged through this pipeline. At the same time, a fan 12 is provided on the waste outlet pipeline. The fan 12 can make the chlorine gas in the chlorine gas zone float upward from the tower body to better contact with the sodium hydroxide solution and react. A conductivity meter 15 is provided on the liquid pipeline 13, and the conductivity meter can detect the alkali content in the reaction solution.

[0039] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A sodium hypochlorite reaction tower, characterized in that, It includes a tower body (1), a trough liquid distributor (2), a packing area (3), a jet packing support plate (4), a chlorine gas area, a partition plate (5) and an alkali liquor area (6). The trough liquid distributor (2), the packing area (3), the jet packing support plate (4), the chlorine gas area, the partition plate (5) and the alkali liquor area (6) are arranged from top to bottom in the tower body. An alkali liquor feed pipe (7) is provided above the trough liquid distributor (2). The packing area (3) is provided with a packing inlet (8) and a packing outlet (9). The chlorine gas area is provided with a chlorine gas inlet. The chlorine gas enters the tower body (1) through a PVDF gas distributor (10). A section of waste gas outlet pipe (11) is provided at the top of the tower body (1). A fan (12) is provided on the waste gas outlet pipe (11). The chlorine gas area and the alkali liquor area (6) are connected through a liquid pipe (13). The alkali liquor area (6) is provided with a discharge pipe (14).

2. The sodium hypochlorite reaction tower according to claim 1, characterized in that: The alkali liquor in the alkali liquor feed pipe (7) is connected to the packing area (3) through the trough liquid distributor (2). The packing area (3) is connected to the chlorine gas area through the jet packing support plate (4). The chlorine gas area and the alkali liquor area (6) are separated by the partition plate (5).

3. The sodium hypochlorite reaction tower according to claim 1, wherein A conductivity meter (15) is provided on the liquid pipe (13).

4. The sodium hypochlorite reaction tower according to claim 1, characterized in that: A mixer (16) is provided on the alkali liquor feed pipe (7).

5. The sodium hypochlorite reaction tower according to claim 4, wherein: A pump (17) and a cooler (18) are provided on the discharge pipe (14).

6. The sodium hypochlorite reaction tower according to claim 5, characterized in that, The discharge pipe (14) and the alkali liquor feed pipe (7) are connected to form a circulation pipeline.

7. The sodium hypochlorite reaction tower according to claim 6, characterized in that, The alkali liquor in the alkali liquor feed pipe (7) comes from a sodium hydroxide solution storage tank (19). A first automatic valve (20) is provided on the pipeline from the sodium hydroxide solution storage tank (19) to the alkali liquor feed pipe (7).

8. The sodium hypochlorite reaction tower according to claim 6, characterized in that, Part of the sodium hypochlorite solution in the discharge pipe (14) is transported to a sodium hypochlorite solution finished product storage tank (21). A second automatic valve (22) is provided on the pipeline from the discharge pipe (14) to the sodium hypochlorite solution finished product storage tank (21).

9. The sodium hypochlorite reaction tower according to claim 1, wherein The trough liquid distributor (2) includes several rows of spray plates (2-1). Continuous tooth-shaped spray troughs are provided on the spray plates (2-1).

10. The sodium hypochlorite reaction tower according to claim 1, wherein: The jet packing support plate (4) is a corrugated jet packing support plate, including side plates (3-1) and corrugated perforated plates (3-2).

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