Brine salty mud purification device

Abstract

The utility model relates to the technical field of salty mud purification, in particular to a brine salty mud purification device, which comprises a salty mud purification system, a salty mud separation system, a salty mud purification system and a salty mud purification system, and is characterized in that the salty mud purification system is used for placing brine salty mud and separating the brine salty mud into concentrated salty mud and brine; the aeration system is used for inputting gas into the salty mud purification system and enabling the gas to pass through filter holes of the salty mud purification system, and the gas output end of the aeration system is connected with the gas input end of the salty mud purification system; the tail gas recovery system is used for recovering and purifying gas passing through the salty mud purification system, through the design of a compressed air pipe and a compressed air storage tank, the original intermittent aeration mode is changed, a stable aeration gas source can be continuously provided, and the aeration effect is improved; through the design of the tail gas recovery system, the tail gas is absorbed and purified, and the tail gas discharged by the tail gas recovery system does not contain salt mist and does not pollute the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of salt mud purification, in particular to a brine salt mud purification device. Background Art

[0002] The raw brine in the salt industry produces refined brine and salt mud after brine purification. The refined brine can be used as raw material for the chlor-alkali industry and industrial salt, while the salt mud needs to be concentrated before entering the later processing process due to its low concentration multiple.

[0003] Flat-plate membrane is used as an important equipment for brine purification, salt sludge filtration and concentration. Flat-plate membrane equipment mainly includes flat-plate membrane pool and flat-plate membrane stack. The membrane pool is used to hold the salt sludge to be filtered, and the flat-plate membrane stack is arranged in the membrane pool, which can filter the salt sludge into brine and concentrated salt sludge.

[0004] Aeration is an important step in the flat membrane filtration concentration process. Its function is to use compressed air to flush the surface of the membrane elements in the flat membrane stack to prevent salt mud from depositing and clogged on the surface of the membrane stack and blocking the membrane pores, causing the flux of the membrane stack to decrease, affecting the filtration efficiency, and thus extending the production cycle. The aeration system consists of an aeration power device and an aeration pipe. At present, the aeration power device generally uses the compressed air generated by the Roots blower as power, and passes it into the membrane stack through the aeration pipe to produce an aeration effect; the Roots blower is a volumetric blower, but it has the disadvantages of large noise and vibration, and inconvenient maintenance; on the other hand, the salt mist tail gas generated after the flat membrane aeration is generally discharged directly into the atmosphere, which will pollute the environment. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the problems in the prior art that the flat membrane of the salt mud filtering and concentrating equipment for brine purification in the salt industry has large noise and vibration during the aeration process, the tail gas contains salt mist, which pollutes the environment, and is easy to cause damage to the flat membrane stack, and the aeration equipment needs to be frequently repaired, a brine salt mud purification device is provided.

[0006] The utility model solves the technical problem by adopting a technical solution: a brine salt mud purification device, comprising:

[0007] Salt mud purification system, which is used for placing brine salt mud and separating it into concentrated salt mud and brine;

[0008] The aeration system is used to input gas into the salt mud purification system and pass the gas through the filter holes of the salt mud purification system. The gas output end of the aeration system is connected to the gas input end of the salt mud purification system. Through the design of the compressed air pipe and the compressed air storage tank, the original intermittent aeration mode is changed, and a stable aeration gas source can be continuously provided to improve the aeration effect, and the service life of the flat membrane tank and the flat membrane stack is extended. Moreover, it has no noise and vibration, will not pollute the environment, will not cause damage to the flat membrane stack, and reduces the loss of membrane elements;

[0009] and a tail gas recovery system, which is used to recover and purify the gas that has passed through the salt mud purification system, wherein the gas input end of the tail gas recovery system is connected to the gas output end of the salt mud purification system;

[0010] Through the design of the tail gas recovery system, the tail gas is absorbed and purified. The tail gas discharged by the tail gas recovery system does not contain salt spray and does not pollute environmental equipment.

[0011] In order to solve the problem of how to arrange the salt mud purification system, the salt mud purification system further includes a flat membrane pool for placing salt mud and a flat membrane stack for filtering salt mud, and the flat membrane stack is arranged in the flat membrane pool.

[0012] In order to solve the problem of high noise and vibration during the aeration process, the aeration system further includes a compressed air pipe, a compressed air storage tank and an aeration pipe; the output end of the compressed air pipe is connected to the input end of the compressed air storage tank, the input end of the compressed air pipe is connected to the air input power part, the compressed air pipe is used to compress the air and input it into the compressed air storage tank, the output end of the compressed air storage tank is connected to the input end of the aeration pipe, and the output end of the aeration pipe is connected to the gas input end of the salt mud purification system.

[0013] It further comprises a pressure reducing valve and a regulating valve installed on the compressed air pipe, the pressure reducing valve is used to control the air pressure in the compressed air pipe, and the regulating valve is used to control the compressed air flow in the compressed air pipe.

[0014] The invention further comprises a safety valve, a steam trap and a pressure gauge installed on the compressed air storage tank.

[0015] In order to solve the problem of exhaust gas containing salt mist and causing environmental pollution, the exhaust gas recovery system further includes a tower body, an induced draft fan, a hydrophobic plate, a spray assembly and two layers of fillers. The input end of the induced draft fan is connected to the top surface of the tower body. The induced draft fan is used to extract air in the tower body to form a negative pressure in the tower body. The hydrophobic plate is installed on the upper part of the tower body. Two layers of fillers are arranged in the tower body at intervals, and the fillers are located below the hydrophobic plate. A water tank is installed on the bottom of the tower body. The input end of the spray assembly is connected to the water tank, and the spray end of the spray assembly extends between the two layers of fillers, and the spray assembly sprays water to the fillers on both sides.

[0016] It further comprises an overflow pipe and a water inlet pipe installed on the tower body, the input end of the overflow pipe is connected to the top of the water tank, and the output end of the water inlet pipe is connected to the water tank.

[0017] It further comprises an exhaust pipe installed on the tower body, the output end of the exhaust pipe is connected to the tower body, and the output end of the exhaust pipe is located below the two layers of fillers, and the input end of the exhaust pipe is connected to the gas output end of the salt mud purification system.

[0018] The beneficial effects of the utility model are as follows: the brine mud purification device provided by the utility model changes the original intermittent aeration mode through the design of the compressed air pipe and the compressed air storage tank, can continuously provide a stable aeration gas source, improve the aeration effect, and extend the service life of the flat membrane tank and the flat membrane stack, and it has no noise and vibration, will not pollute the environment, will not cause damage to the flat membrane stack, and reduces the loss of membrane elements;

[0019] Through the design of the tail gas recovery system, the tail gas is absorbed and purified. The tail gas discharged by the tail gas recovery system does not contain salt spray and does not pollute environmental equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] In the figure: 1. Salt mud purification system, 11. Flat-plate membrane tank, 12. Flat-plate membrane stack;

[0023] 2. Aeration system, 21. Compressed air pipe, 22. Compressed air storage tank, 23. Aeration pipe, 24. Pressure reducing valve, 25. Regulating valve, 26. Safety valve, 27. Steam trap, 28. Pressure gauge;

[0024] 3. Tail gas recovery system, 31. Tower body, 32. induced draft fan, 33. Drain plate, 34. Spray assembly, 35. Filler, 36. Water tank, 37. Overflow pipe, 38. Water inlet pipe, 39. Exhaust pipe. DETAILED DESCRIPTION

[0025] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0026] like Figure 1 This is a schematic diagram of the structure of the utility model, a brine salt mud purification device, comprising:

[0027] The salt mud purification system 1 is used for placing brine salt mud and separating it into concentrated salt mud and brine. The salt mud purification system 1 comprises a flat membrane pool 11 for placing the salt mud and a flat membrane stack 12 for filtering the salt mud. The flat membrane stack 12 is arranged in the flat membrane pool 11.

[0028] like Figure 1 As shown, the aeration system 2 is used to input gas to the salt mud purification system 1 and make the gas pass through the filter holes of the salt mud purification system 1. The gas output end of the aeration system 2 is connected to the gas input end of the salt mud purification system 1. The aeration system 2 includes a compressed air pipe 21, a compressed air storage tank 22 and an aeration pipe 23. The input end of the aeration pipe 23 can be connected to the output end of the compressed air supplied by the external power station, and can also be connected to an air output power part such as an air pump, thereby avoiding direct connection between the air power part and the salt mud purification system 1, thereby reducing the influence of vibration on the membrane element; the output end of the compressed air pipe 21 is connected to the input end of the compressed air storage tank 22 The input end of the compressed air pipe 21 is connected to the air input power part, the compressed air pipe 21 is used to compress the air and input it into the compressed air storage tank 22, the output end of the compressed air storage tank 22 is connected to the input end of the aeration pipe 23, and the output end of the aeration pipe 23 is connected to the gas input end of the salt mud purification system 1, which changes the original intermittent aeration mode, can continuously provide a stable aeration gas source, improve the aeration effect, and extend the service life of the flat membrane pool 11 and the flat membrane stack 12. It has no noise and vibration, will not pollute the environment, will not cause damage to the flat membrane stack 12, and reduces the loss of membrane elements.

[0029] A pressure reducing valve 24 and a regulating valve 25 are installed on the compressed air pipe 21 . The pressure reducing valve 24 is used to control the air pressure in the compressed air pipe 21 , and the regulating valve 25 is used to control the compressed air flow in the compressed air pipe 21 .

[0030] like Figure 1 As shown, a safety valve 26, a steam trap 27 and a pressure gauge 28 are installed on the compressed air storage tank 22. The safety valve 26 is used to maintain the pressure in the compressed air storage tank 22, the steam trap 27 is used to discharge the water in the compressed air storage tank 22, and the pressure gauge 28 is used to detect the pressure in the compressed air storage tank 22. The pressure gauge 28 is linked with the regulating valve 25 to provide pressure information for the regulating valve 25 to facilitate the regulation of the regulating valve 25. The pressure gauge 28 is linked with the safety valve 26 to provide pressure information for the safety valve 26 to facilitate the regulation of the safety valve 26.

[0031] And a tail gas recovery system 3 is used to recover and purify the gas passing through the salt mud purification system 1 , and the gas input end of the tail gas recovery system 3 is connected to the gas output end of the salt mud purification system 1 .

[0032] like Figure 1As shown, the tail gas recovery system 3 includes a tower body 31, an induced draft fan 32, a hydrophobic plate 33, a spray assembly 34 and two layers of fillers 35.

[0033] The input end of the induced draft fan 32 is connected to the top surface of the tower body 31. The induced draft fan 32 is used to extract air in the tower body 31, so that negative pressure is formed in the tower body 31, so that the air with salt mist discharged from the salt mud purification system 1 is discharged into the atmosphere after being processed by two layers of fillers, the spray assembly 34 and the hydrophobic plate 33, so as to achieve tail gas purification;

[0034] like Figure 1 As shown, a hydrophobic plate 33 is installed on the upper part of a tower body 31, two layers of fillers 35 are arranged at intervals in the tower body 31, and the fillers 35 are located below the hydrophobic plate 33, a water tank 36 is installed on the bottom surface of the tower body 31, and the water tank 36 is used to store clean spray water, and the input end of a spray assembly 34 is connected to the water tank 36, the spray assembly 34 includes a spray pipe, a spray head installed on the spray pipe, and a spray water pump for providing flow power for the spray water, the spray end of the spray assembly 34 extends between the two layers of fillers 35, and the spray assembly 34 sprays water to the fillers 35 on both sides, and the hydrophobic plate 33 is used to remove water vapor in the gas.

[0035] An overflow pipe 37 and a water inlet pipe 38 are installed on the tower body 31. The top surface of the water tank 36 is an open structure, which can allow spray water to fall into. The input end of the overflow pipe 37 is connected to the top of the water tank 36, and the port of the overflow end 37 is flush with the top surface of the water tank 36. The output end of the water inlet pipe 38 is connected to the water tank 36. The overflow pipe 37 is used to discharge water with impurities and transport it to subsequent equipment for treatment. The water inlet pipe 38 is used to replenish the spray water in the water tank 36. The input end of the water inlet pipe 38 is connected to a water pump.

[0036] like Figure 1 As shown, an exhaust pipe 39 is installed on the tower body 31, and the output end of the exhaust pipe 39 is connected to the tower body 31, and the output end of the exhaust pipe 39 is located below the two layers of fillers 35, and the output end of the exhaust pipe 39 is located above the input end of the overflow pipe 37, and the input end of the exhaust pipe 39 is connected to the gas output end of the salt mud purification system 1.

[0037] Working principle:

[0038] Aeration process: The compressed air (pressure 0.6-0.7 MPa) supplied by the power station enters the compressed air storage tank 22 through the compressed air pipe 21 and the pressure reducing valve 24 and regulating valve 25 connected thereto, wherein the pressure reducing valve 24 adjusts the compressed air pressure to a stable 0.05 MPa, and the regulating valve 25 interlocked with the pressure gauge 28 adjusts the flow of compressed air entering the compressed air storage tank 22. The pressure reducing valve 24 and regulating valve 25 ensure that the pressure in the compressed air storage tank 22 is maintained at 0.03 MPa to achieve the purpose of continuous aeration; the compressed air with a stable pressure of 0.03 MPa coming out of the compressed air storage tank 22 enters the flat-plate membrane pool 11 through the aeration pipe 23 to perform continuous aeration operation on the flat-plate membrane stack 12;

[0039] Tail gas treatment process: the induced draft fan 32 exhausts the air in the tower body 31 through the induced draft duct, so that a negative pressure is formed in the tower body 31, so that the salt mist tail gas aerated from the flat membrane pool 11 is continuously sucked into the tower body 31 through the exhaust pipe 39; the salt mist tail gas will be washed into clean air in the tower body 31 and discharged from the tower body 31 through the induced draft fan 32 through the induced draft duct; the spray water pump of the spray assembly 34 pumps the fresh water in the water tank 36 at the bottom of the tower body 31 through the spray assembly 34 at a flow rate of 10-15m3 / h. The sprinkler pipe is pumped into the tower body 31, and the spray head on the spray pipe can spray fresh water evenly on the two layers of fillers 35; the water tank 36 is connected to the water inlet pipe 38, and the overflow pipe 37 continuously overflows the salt-containing water. The water inlet pipe 38 continuously replenishes fresh water to ensure that the salt content of the fresh water in the water tank 36 is close to zero; the salt mist exhaust passes through the gap between the two layers of fillers 35, and after being washed by the sprayed fresh water, the salt is washed away to become clean air, and then the water droplets are blocked by the hydrophobic plate 33 and discharged out of the tower body 31.

[0040] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A brine mud purification device, characterized in that: include: A salt mud purification system (1) for placing brine salt mud and separating it into concentrated salt mud and brine; An aeration system (2) is used to input gas into a salt mud purification system (1) and allow the gas to pass through the filter holes of the salt mud purification system (1); the gas output end of the aeration system (2) is connected to the gas input end of the salt mud purification system (1); the aeration system (2) comprises a compressed air pipe (21), a compressed air storage tank (22) and an aeration pipe (23); the output end of the compressed air pipe (21) is connected to the input end of the compressed air storage tank (22); the input end of the compressed air pipe (21) is connected to an air input power member; the compressed air pipe (21) is used to compress air and input it into the compressed air storage tank (22); the output end of the compressed air storage tank (22) is connected to the input end of the aeration pipe (23); the output end of the aeration pipe (23) is connected to the gas input end of the salt mud purification system (1); And a tail gas recovery system (3) for recovering and purifying the gas passing through the salt mud purification system (1), wherein the gas input end of the tail gas recovery system (3) is connected to the gas output end of the salt mud purification system (1).

2. A brine mud purification device as claimed in claim 1, characterized in that: The salt mud purification system (1) comprises a flat membrane pool (11) for placing salt mud and a flat membrane stack (12) for filtering salt mud, wherein the flat membrane stack (12) is arranged in the flat membrane pool (11).

3. A brine mud purification device as claimed in claim 1, characterized in that: A pressure reducing valve (24) and a regulating valve (25) are installed on the compressed air pipe (21); the pressure reducing valve (24) is used to control the air pressure in the compressed air pipe (21); and the regulating valve (25) is used to control the flow rate of compressed air in the compressed air pipe (21).

4. A brine mud purification device as claimed in claim 1, characterized in that: The compressed air storage tank (22) is equipped with a safety valve (26), a steam trap (27) and a pressure gauge (28).

5. A brine mud purification device as claimed in claim 1, characterized in that: The tail gas recovery system (3) comprises a tower body (31), an induced draft fan (32), a hydrophobic plate (33), a spray assembly (34) and two layers of fillers (35); the input end of the induced draft fan (32) is connected to the top surface of the tower body (31); the induced draft fan (32) is used to extract air in the tower body (31) so that negative pressure is formed in the tower body (31); the hydrophobic plate (33) is installed on the upper part of the tower body (31); two layers of fillers (35) are arranged in the tower body (31) at intervals, and the fillers (35) are located below the hydrophobic plate (33); a water tank (36) is installed on the bottom surface of the tower body (31); the input end of the spray assembly (34) is connected to the water tank (36); the spray end of the spray assembly (34) extends between the two layers of fillers (35); and the spray assembly (34) sprays water onto the fillers (35) on both sides.

6. A brine mud purification device as claimed in claim 5, characterized in that: An overflow pipe (37) and a water inlet pipe (38) are installed on the tower body (31); the top surface of the water tank (36) is open; the input end of the overflow pipe (37) is connected to the top of the water tank (36); and the output end of the water inlet pipe (38) is connected to the water tank (36).

7. A brine mud purification device as claimed in claim 5, characterized in that: An exhaust pipe (39) is installed on the tower body (31), the output end of the exhaust pipe (39) is connected to the tower body (31), and the output end of the exhaust pipe (39) is located below the two layers of fillers (35), and the input end of the exhaust pipe (39) is connected to the gas output end of the salt mud purification system (1).

Images