CN221854778U - An isolation and pressure relief device for an ion membrane caustic soda electrolyzer - Google Patents

Abstract

The utility model provides an isolation pressure relief device of an ionic membrane caustic soda electrolytic tank. The ion membrane caustic soda electrolysis bath isolation pressure relief device comprises a hydrogen water seal cylinder and a chlorine water seal cylinder which are fixedly arranged on a mounting frame, wherein a hydrogen discharge pipe is arranged at the top of the hydrogen water seal cylinder, a chlorine discharge pipe is arranged at the top of the chlorine water seal cylinder, a hydrogen inlet pipe is fixedly arranged in the hydrogen water seal cylinder, a chlorine inlet pipe is fixedly arranged in the chlorine water seal cylinder, a clear water injection pipe, a clear water overflow pipe and a clear water drain pipe are fixedly arranged on the hydrogen water seal cylinder, the ion membrane caustic soda electrolysis bath isolation pressure relief device further comprises a brine liquid storage tank and a slurry pump which are fixedly arranged on the mounting frame, a stirrer is rotatably arranged in the brine liquid storage tank, and an electric motor is fixedly arranged at the top of the brine liquid storage tank. The isolation pressure relief device of the ionic membrane caustic soda electrolytic tank has the advantages of no generation of chlorine-containing wastewater, and more economical and environment-friendly use.

Description

An isolation and pressure relief device for an ion membrane caustic soda electrolyzer

Technical Field

The utility model relates to the technical field of ion membrane electrolysis, in particular to an isolation and pressure relief device for an ion membrane caustic soda electrolysis cell.

Background Art

In the process of using electrolytic cells to prepare ion membrane caustic soda, a large amount of hydrogen and chlorine will be produced. Large-scale electrolytic devices are generally composed of multiple electrolytic cells. When an electrolytic cell fails, it is necessary to properly shut down and isolate the electrolytic cell, and control the pressure of the hydrogen and chlorine mains.

The Chinese utility model patent with application number 201320381611.6 in the prior art discloses an ion membrane caustic soda electrolyzer isolation and pressure relief device, comprising a hydrogen water seal cylinder and a chlorine water seal cylinder respectively installed on a water seal base, wherein the upper parts of the hydrogen water seal cylinder and the chlorine water seal cylinder are respectively provided with an air inlet pipe and an exhaust pipe, and the upper side wall is connected with a water seal overflow pipe U-shaped bend water seal; upper and lower connecting devices are respectively provided between the hydrogen water seal cylinder and the chlorine water seal cylinder. The ion membrane caustic soda electrolyzer isolation and pressure relief device is simple to operate, and the pressure is steadily reduced during operation, which can avoid the impact and damage caused by the isolation of a single electrolyzer to the electrolyzer, solve the problem of difficult pressure control during the isolation of the electrolyzer, and effectively extend the service life of the ion membrane.

However, when the ion membrane caustic soda electrolyzer isolation and pressure relief device proposed in the above patent is in use, clean water is introduced into the hydrogen water seal cylinder and the chlorine water seal cylinder, and chlorine is soluble in water, resulting in a large amount of chlorine-containing wastewater being discharged during the pressure relief process. The discharged chlorine-containing wastewater needs to be specially treated later, which is not economical and environmentally friendly.

However, the traditional sliding aluminum alloy window sill is inconvenient to clean the dust in the internal slide rail during use, occupies a large space, and the rotating window sill occupies a large space.

Therefore, it is necessary to provide a new ion membrane caustic soda electrolyzer isolation and pressure relief device to solve the above technical problems.

Utility Model Content

The technical problem solved by the utility model is to provide an isolating and pressure-relieving device for an ion membrane caustic soda electrolyzer which does not generate chlorine-containing wastewater and is more economical and environmentally friendly.

In order to solve the above technical problems, the utility model provides an ion membrane caustic soda electrolyzer isolation and pressure relief device, which includes: a hydrogen water seal cylinder and a chlorine water seal cylinder fixedly mounted on a mounting frame, a hydrogen discharge pipe is arranged on the top of the hydrogen water seal cylinder, a chlorine discharge pipe is arranged on the top of the chlorine water seal cylinder, a hydrogen inlet pipe is fixedly mounted in the hydrogen water seal cylinder, a chlorine inlet pipe is fixedly mounted in the chlorine water seal cylinder, a clean water injection pipe, a clean water overflow pipe and a clean water drainage pipe are fixedly mounted on the hydrogen water seal cylinder, and also includes a brine storage tank and a slurry pump fixedly mounted on the mounting frame, a stirrer is rotatably mounted in the brine storage tank, an electric motor is fixedly mounted on the top of the brine storage tank, and the central axis of the stirrer is fixedly mounted on the brine storage tank. The top of the pump extends to the top of the brine storage tank and is fixedly connected to the output shaft of the electric motor. A suction pipe is fixedly installed on the water inlet of the slurry pump. The bottom end of the suction pipe extends into the brine storage tank and is installed with a filter. The filter includes a filter box and a filter hole opened on the outer wall of the filter box on the side away from the suction pipe. The filter box is threadedly sleeved on the suction pipe. A brine injection pipe is fixedly installed on the chlorine water seal cylinder. The bottom end of the brine injection pipe is fixedly connected to the water outlet of the slurry pump. A brine overflow pipe and a brine drain pipe are fixedly installed on the chlorine water seal cylinder. The lower ends of the brine overflow pipe and the brine drain pipe extend into the brine storage tank.

Furthermore, a feeding port is provided on the top of the brine storage tank, and a sealing plug is provided in the feeding port.

Furthermore, an observation port is provided on the brine storage tank, and a transparent glass is fixedly installed in the observation port.

Furthermore, the filter element also includes a fixing frame, a rotating shaft, a plurality of propeller blades and two levers, the fixing frame is fixedly mounted on the filter box, the rotating shaft is rotatably mounted on the fixing frame, the plurality of propeller blades are fixedly mounted on the rotating shaft, the two levers are fixedly mounted on the rotating shaft, and the two levers are both in contact with the outer wall of the filter box on one side away from the water suction pipe.

Furthermore, a plurality of anti-slip convex strips distributed in an annular shape are integrally formed on the outer wall of the filter box.

Compared with the related art, the ion membrane caustic soda electrolyzer isolation and pressure relief device provided by the utility model has the following beneficial effects:

The utility model provides an ion membrane caustic soda electrolyzer isolation pressure relief device. Through the arrangement of a salt water injection pipe, a salt water overflow pipe, a salt water drainage pipe, a salt water storage tank, a slurry pump, a water pumping pipe, an electric motor and a stirrer, when in use, saturated salt water can be prepared in the salt water storage tank, and introduced into a chlorine water seal cylinder through the slurry pump, so that the saturated salt water replaces the traditional clean water. Since chlorine has the characteristic of being difficult to dissolve in saturated salt water, only a very small amount of the drawn chlorine is integrated into the saturated salt water, and the saturated salt water can be recycled. No chlorine-containing waste water is discharged in the whole pressure relief process, and the link of special treatment of chlorine-containing waste water in the traditional technology is omitted. Therefore, it has the advantages of being more economical and environmentally friendly to use. Through the arrangement of the filter element, when the saturated salt water is extracted by the slurry pump, the sodium chloride particles not dissolved in the process of preparing the saturated salt water can be filtered, and the sodium chloride particles can be prevented from adhering to the vicinity of the filter hole of the filter element, so as to ensure the permeability of the incoming water, and has the advantage of reliable use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic rear structural view of a preferred embodiment of an isolation and pressure relief device for an ion-exchange membrane caustic soda electrolyzer provided by the utility model;

FIG2 is a schematic diagram of a rear cross-sectional structure of the salt water storage tank shown in FIG1 ;

FIG3 is a schematic structural diagram of the filter element shown in FIG2 ;

FIG. 4 is a schematic diagram of the assembly of the filter element and the water suction pipe shown in FIG. 2 .

Numbers in the figure: 1. Hydrogen water seal cylinder; 2. Chlorine water seal cylinder; 3. Hydrogen discharge pipe; 4. Chlorine discharge pipe; 5. Hydrogen inlet pipe; 6. Chlorine inlet pipe; 7. Clean water injection pipe; 8. Brine injection pipe; 9. Clean water overflow pipe; 10. Brine overflow pipe; 11. Clean water drainage pipe; 12. Brine drainage pipe; 13. Brine storage tank; 14. Slurry pump; 15. Suction pipe; 16. Electric motor; 17. Agitator; 18. Filter element; 1801. Filter box; 1802. Filter hole; 1803. Fixed frame; 1804. Rotating shaft; 1805. Propeller blade; 1806. Push rod.

DETAILED DESCRIPTION

The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

Please refer to Figures 1-4, wherein Figure 1 is a rear view structural schematic diagram of a preferred embodiment of the ion membrane caustic soda electrolyzer isolation and pressure relief device provided by the utility model; Figure 2 is a rear view cross-sectional structural schematic diagram of the brine storage tank shown in Figure 1; Figure 3 is a structural schematic diagram of the filter element shown in Figure 2; and Figure 4 is an assembly schematic diagram of the filter element and the water pump shown in Figure 2. The isolation and pressure relief device of the ion membrane caustic soda electrolyzer comprises: a hydrogen water seal cylinder 1 and a chlorine water seal cylinder 2 fixedly installed on a mounting frame, which are used to receive hydrogen and chlorine respectively; a hydrogen discharge pipe 3 is provided on the top of the hydrogen water seal cylinder 1, and the hydrogen discharge pipe 3 is connected to the emptying pipe; a chlorine discharge pipe 4 is provided on the top of the chlorine water seal cylinder 2, and the chlorine discharge pipe 4 is connected to the waste gas treatment equipment through a pipeline; a hydrogen inlet pipe 5 is fixedly installed in the hydrogen water seal cylinder 1, and the hydrogen inlet pipe 5 is connected to the main hydrogen outlet pipe of the electrolyzer; a chlorine inlet pipe 6 is fixedly installed in the chlorine water seal cylinder 2, and the chlorine inlet pipe 6 is connected to the main chlorine outlet pipe of the electrolyzer; a clean water injection pipe 7, a clean water overflow pipe 9 and a clean water drainage pipe 11 are fixedly installed on the hydrogen water seal cylinder 1, and the clean water injection pipe 7 is connected to an external clean water source, the clean water overflow pipe 9 and the clean water drainage pipe 11 are connected to the clean water recovery pipeline of the clean water source, and also includes a brine storage tank 13 and a slurry pump 14 fixedly installed on the mounting frame, the brine storage tank 13 is used to store and prepare saturated salt water, the top of the brine storage tank 13 is provided with a feeding port, and a sealing plug is provided in the feeding port. After the sealing plug is opened, water and sodium chloride particles can be injected into the brine storage tank 13 through the feeding port, and an agitator 17 is rotatably installed in the brine storage tank 13, and an electric motor 16 is fixedly installed on the top of the brine storage tank 13, the top end of the central axis of the agitator 17 extends to the top of the brine storage tank 13 and is fixedly connected to the output shaft of the electric motor 16, and the electric motor 16 drives the agitator 17 to rotate The slurry pump 14 is provided with a pumping pipe 15 fixedly mounted on the water inlet, the bottom end of the pumping pipe 15 extends into the brine storage tank 13, and is provided with a filter 18, the filter 18 is used to filter the undissolved sodium chloride particles, the filter 18 comprises a filter box 1801 and a filter hole 1802 provided on the outer wall of the filter box 1801 away from the pumping pipe 15, the filter box 1801 is threadedly sleeved on the pumping pipe 15, a brine injection pipe 8 is fixedly mounted on the chlorine water seal cylinder 2, the bottom end of the brine injection pipe 8 is fixedly connected to the water outlet of the slurry pump 14, the saturated brine in the brine storage tank 13 is extracted by the slurry pump 14, and is injected into the brine through the brine injection pipe 8. In the chlorine water seal cylinder 2, a brine overflow pipe 10 and a brine drain pipe 12 are fixedly installed on the chlorine water seal cylinder 2. The lower ends of the brine overflow pipe 10 and the brine drain pipe 12 extend into the brine storage tank 13. When saturated brine is injected into the brine storage tank 13, the excess saturated brine is discharged into the brine storage tank 13 through the brine overflow pipe 10. When the saturated brine remaining in the chlorine water seal cylinder 2 is drained and air is drawn, it is discharged back into the brine storage tank 13 through the brine drain pipe 12. Since chlorine has the characteristic of being difficult to dissolve in saturated brine, the chlorine dissolved in the saturated brine is very small, so the saturated brine can be recycled for a long time, and the link of special treatment of chlorine-containing wastewater is also omitted.

In this embodiment, in order to facilitate relevant personnel to observe the dissolution of sodium chloride particles, an observation port is opened on the salt water storage tank 13, and a transparent glass is fixedly installed in the observation port.

In this embodiment, in order to prevent undissolved sodium chloride particles from adhering to the vicinity of the filter hole 1802 and affecting the permeability of the inlet water, the filter element 18 also includes a fixing frame 1803, a rotating shaft 1804, a plurality of propeller blades 1805 and two levers 1806. The fixing frame 1803 is fixedly mounted on the filter box 1801, the rotating shaft 1804 is rotatably mounted on the fixing frame 1803, the plurality of propeller blades 1805 are fixedly mounted on the rotating shaft 1804, and the two levers 1806 are fixedly mounted on the rotating shaft 1804. On the upper side, the two levers 1806 are both in contact with the outer wall of the filter box 1801 away from the water suction pipe 15. When the slurry pump 14 is running, the saturated brine in the brine storage tank 13 enters the filter box 1801 at a relatively high speed. Under the push of the saturated brine, the propeller blades 1805 can rotate, thereby rotating the two levers 1806 on the rotating shaft 1804. When the levers 1806 continue to rotate, it can well prevent the undissolved sodium chloride particles from adhering to the vicinity of the filter hole 1802.

In this embodiment, in order to facilitate the installation of the filter box 1801 on the water suction pipe 15, a plurality of anti-slip convex strips distributed in an annular shape are integrally formed on the outer wall of the filter box 1801.

The working principle of the isolation and pressure relief device for the ion membrane caustic soda electrolyzer provided by the utility model is as follows:

When in use, after opening the sealing plug on the salt water storage tank 13, firstly, add clean water and sodium chloride particles into the tank through the feeding port, then turn on the electric motor 16 to drive the stirrer 17 to rotate. Under the action of stirring, the sodium chloride particles can be quickly dissolved in the clean water. During the stirring process, the dissolution of the sodium chloride particles is observed through the transparent observation window. If all the sodium chloride particles in the tank can be dissolved, then continue to add sodium chloride particles into the tank until it is observed that some of the sodium chloride particles in the tank cannot be dissolved under a long period of stirring, which means that the salt water in the salt water storage tank 13 is saturated at this time.

When the electrolytic cell to be isolated is depressurized, water from an external clean water source is injected into the hydrogen water seal cylinder 1 through the clean water injection pipe 7 by using a water pump. When clean water flows out of the clean water overflow pipe 9, the water pump is turned off, and the slurry pump 14 is started to operate. The saturated salt water in the salt water storage tank 13 is pumped out through the pumping pipe 15 and injected into the chlorine water seal cylinder 2 through the salt water injection pipe 8. When saturated salt water flows out of the salt water overflow pipe 10, the slurry pump 14 is turned off, and then the hydrogen inlet pipe is opened. 5 and the valves on the chlorine inlet pipe 6, so that the hydrogen water seal cylinder 1 and the chlorine water seal cylinder 2 are connected to the hydrogen discharge main pipe and the chlorine discharge main pipe of the electrolyzer respectively, and then the water valves on the clean water drain pipe 11 and the salt water drain pipe 12 are opened in sequence to drain water. During the drainage process, part of the hydrogen in the hydrogen discharge main pipe will enter the hydrogen water seal cylinder 1, and part of the chlorine in the chlorine discharge main pipe will enter the chlorine water seal cylinder 2, thereby achieving the pressure relief work of the electrolyzer to be isolated;

Since chlorine is difficult to dissolve in saturated salt water, only a very small amount of chlorine will be dissolved in the saturated salt water when the chlorine enters the chlorine water seal cylinder 2. Therefore, the saturated salt water can be circulated for a long time. Since the entire device no longer discharges chlorine-containing wastewater, the subsequent special treatment of chlorine-containing wastewater is omitted.

When the slurry pump 14 is turned on to extract saturated brine into the brine storage tank 13, the saturated brine in the brine storage tank 13 enters the filter box 1801 at a relatively high speed. Under the push of the saturated brine, the propeller blades 1805 can rotate, thereby rotating the two levers 1806 on the rotating shaft 1804. When the levers 1806 continue to rotate, it can effectively prevent undissolved sodium chloride particles from adhering to the vicinity of the filter hole 1802.

Compared with the related art, the ion membrane caustic soda electrolyzer isolation and pressure relief device provided by the utility model has the following beneficial effects:

The utility model provides an isolation and pressure relief device for an ion membrane caustic soda electrolyzer. Through the arrangement of a brine injection pipe 8, a brine overflow pipe 10, a brine drainage pipe 12, a brine storage tank 13, a slurry pump 14, a water pumping pipe 15, an electric motor 16 and a stirrer 17, when in use, saturated brine can be prepared in the brine storage tank 13, and introduced into a chlorine water seal cylinder 2 through the slurry pump 14, so that saturated brine replaces traditional clean water. Since chlorine has the characteristic of being difficult to dissolve in saturated brine, only a very small amount of the drawn chlorine is integrated into the saturated brine. The saturated brine can be recycled, and no chlorine-containing wastewater is discharged during the entire pressure relief process, which eliminates the need for special treatment of the chlorine-containing wastewater in the traditional technology. Therefore, it has the advantages of being more economical and environmentally friendly. Through the setting of the filter element 18, when the slurry pump 14 extracts saturated brine, the undissolved sodium chloride particles in the preparation process of the saturated brine can be filtered, and the sodium chloride particles can be prevented from adhering to the vicinity of the filter hole 1802 of the filter element 18, thereby ensuring the permeability of the incoming water, and having the advantage of reliable use.

The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (5)

1. An ion membrane caustic soda electrolyzer isolation and pressure relief device, comprising a hydrogen water seal cylinder and a chlorine water seal cylinder fixedly mounted on a mounting frame, a hydrogen discharge pipe is arranged on the top of the hydrogen water seal cylinder, a chlorine discharge pipe is arranged on the top of the chlorine water seal cylinder, a hydrogen inlet pipe is fixedly mounted in the hydrogen water seal cylinder, a chlorine inlet pipe is fixedly mounted in the chlorine water seal cylinder, a clean water injection pipe, a clean water overflow pipe and a clean water drainage pipe are fixedly mounted on the hydrogen water seal cylinder, characterized in that it also comprises a brine storage tank and a slurry pump fixedly mounted on the mounting frame, a stirrer is rotatably mounted in the brine storage tank, an electric motor is fixedly mounted on the top of the brine storage tank, and the top end of the central axis of the stirrer extends It extends to the top of the brine storage tank and is fixedly connected to the output shaft of the electric motor. A suction pipe is fixedly installed on the water inlet of the slurry pump. The bottom end of the suction pipe extends into the brine storage tank and is installed with a filter. The filter includes a filter box and a filter hole opened on the outer wall of the filter box on the side away from the suction pipe. The filter box is threadedly sleeved on the suction pipe. A brine injection pipe is fixedly installed on the chlorine water seal cylinder. The bottom end of the brine injection pipe is fixedly connected to the water outlet of the slurry pump. A brine overflow pipe and a brine drain pipe are fixedly installed on the chlorine water seal cylinder. The lower ends of the brine overflow pipe and the brine drain pipe extend into the brine storage tank. 2. The isolation and pressure relief device for the ion membrane caustic soda electrolyzer according to claim 1 is characterized in that a feeding port is provided at the top of the brine storage tank, and a sealing plug is provided in the feeding port. 3. The ion membrane caustic soda electrolyzer isolation and pressure relief device according to claim 1 is characterized in that an observation port is opened on the brine storage tank, and a transparent glass is fixedly installed in the observation port. 4. The isolation and pressure relief device for the ion membrane caustic soda electrolyzer according to claim 1 is characterized in that the filter element also includes a fixing frame, a rotating shaft, a plurality of propeller blades and two levers, the fixing frame is fixedly mounted on the filter box, the rotating shaft is rotatably mounted on the fixing frame, the plurality of propeller blades are fixedly mounted on the rotating shaft, the two levers are fixedly mounted on the rotating shaft, and the two levers are both in contact with the outer wall of the filter box on one side away from the water suction pipe. 5. The isolation and pressure relief device for an ion membrane caustic soda electrolyzer according to claim 4 is characterized in that a plurality of anti-slip convex strips distributed in a ring shape are integrally formed on the outer wall of the filter box.