Wet dust removal device

Abstract

The utility model provides a wet dust removal device. The wet dust removal device comprises a slow centrifugal liquid drop separator, an air inlet unit, a water inlet unit and a filtering unit, a gas outlet, a gas inlet and a liquid outlet are sequentially formed in the slow centrifugal liquid drop separator from top to bottom; a gas inlet pipeline of the gas inlet unit is communicated with a gas inlet of the slow centrifugal liquid drop separator; the water inlet unit comprises a water tank, a water collecting port of the water tank is communicated with a liquid outlet of the slow centrifugal droplet separator, and a first water outlet of the water tank is connected between a body of the slow centrifugal droplet separator and the air inlet through a first water pump; the filtering unit is communicated with the first water inlet and the second water outlet of the water tank through a second water pump and comprises at least two filtering branches connected in parallel; in the height direction of the water tank, the first water outlet is lower than the first water inlet and higher than the second water outlet. The wet dust removal device provided by the utility model is good in dust removal effect, and can effectively improve the use efficiency of circulating water, reduce the generation of waste water and reduce the production cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal, and particularly relates to a wet dust removal device. Background Art

[0002] During the production process of polyester resin products, the reacted polyester resin material is first pumped from the bottom of the reaction kettle into the resin filtration house by a gear pump. The polyester resin material passing through the resin filtration house will flow into the feeding tank, and then overflow from the feeding tank to the cooling conveyor belt for cooling and crushing, and then be packaged into products. During the process of the polyester resin at about 190°C overflowing from the feeding tank to the cooling conveyor belt for cooling, a large amount of waste gas (resin vapor) will be emitted. According to environmental protection requirements, it needs to be collected and treated in an organized manner before being discharged into the atmosphere.

[0003] During the process of the waste gas being collected uniformly, solid particulate condensates will be generated as the temperature drops. The condensates have a certain viscosity, so dust removal treatment is required to filter them before being discharged into the atmosphere. However, the traditional wet dust collector separates the condensates in the resin vapor by means of a water bath, and the separated condensates enter the water tank and are mixed with tap water for temporary storage. Since the condensates continuously enter the water tank, it is necessary to frequently replace the wastewater (the mixture of condensates and tap water) in the water tank with clean tap water. However, it is not easy to control the wastewater replacement time. If the water in the water tank is too dirty, the separation effect of the condensates from the resin vapor cannot reach the expected level, and the wastewater replacement is frequent and large in quantity, which needs to be further treated, undoubtedly increasing the production cost. Summary of the Utility Model

[0004] In view of the problems existing in the above-mentioned prior art, the main purpose of the utility model is to provide a wet dust removal device, which has good dust removal effect, can effectively improve the utilization efficiency of circulating water, reduce the generation of wastewater, and lower the production cost.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a wet dust removal device, which includes a slow-speed centrifugal droplet separator, an air inlet unit, a water inlet unit, and a filtering unit; wherein,

[0007] The slow-speed centrifugal droplet separator is successively provided with an air outlet, an air inlet, and a liquid outlet from top to bottom;

[0008] The air inlet unit includes an air inlet pipe that is communicated with the air inlet of the slow-speed centrifugal droplet separator;

[0009] The water inlet unit includes a water tank. The water collection port of the water tank is communicated with the liquid outlet of the slow-speed centrifugal droplet separator. The first water outlet of the water tank is connected to the space between the main body and the air inlet of the slow-speed centrifugal droplet separator through a first water pump.

[0010] The filtration unit is communicated between the first water inlet and the second water outlet of the water tank through a second water pump. The filtration unit includes at least two parallel filtration branches. In the height direction of the water tank, the first water outlet is lower than the first water inlet and higher than the second water outlet.

[0011] As a further description of the above technical solution, the water inlet unit further includes a liquid level sensor and a water replenishment solenoid valve.

[0012] The water replenishment solenoid valve is arranged on the connecting pipe between the second water inlet of the water tank and an external water source.

[0013] The liquid level sensor is electrically connected to the water replenishment solenoid valve to control the opening and closing of the water replenishment solenoid valve.

[0014] As a further description of the above technical solution, the second water inlet of the water tank is higher than its second water outlet.

[0015] As a further description of the above technical solution, a pressure balance pipe is also communicated between the air inlet of the slow-speed centrifugal droplet separator and the water tank.

[0016] As a further description of the above technical solution, a flow meter and a first pressure regulating valve are also arranged on the pipeline connecting the first water outlet of the water tank and the slow-speed centrifugal droplet separator.

[0017] As a further description of the above technical solution, an exhaust fan is connected to the air outlet of the slow-speed centrifugal droplet separator.

[0018] As a further description of the above technical solution, the second water pump is arranged between the inlet of the filtration unit and the second water outlet of the water tank; or between the outlet of the filtration unit and the first water inlet of the water tank.

[0019] As a further description of the above technical solution, each filtration branch includes a filter and a branch valve. The filter is communicated with the second water outlet of the water tank through the branch valve.

[0020] As a further description of the above technical solution, a differential pressure gauge interface is arranged between the inlet and the outlet of each filter to connect a differential pressure gauge. The differential pressure gauge is electrically connected to the branch valve to control the opening and closing of the branch valve.

[0021] As a further description of the above technical solution, a second pressure regulating valve is further provided between the filtering unit and the second water outlet of the water tank.

[0022] With the above technical solution, the outstanding effects of the present utility model are as follows:

[0023] 1. The wet dust removal device provided by the present utility model still adopts the water bath method to separate the condensate in the resin vapor. It is provided with a filtering unit, a second water pump and a water tank to form a self-circulating filtering circuit, so that the condensate liquid containing condensate can be filtered by the filtering unit to remove the condensate and then returned to the water tank for recycling, thereby being able to maintain excellent dust removal effect persistently, effectively improving the utilization efficiency of circulating water, reducing the generation of waste water, and reducing the subsequent waste water treatment cost;

[0024] 2. The filtering unit in the wet dust removal device provided by the present utility model includes at least two parallel filtering branches, and the filtering branches can be set to perform filtering operations respectively, ensuring that the waste gas treatment operation can still continue during the process of cleaning the filtering branches, and ensuring the production efficiency. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the wet dust removal device in the embodiment of the present utility model.

[0026] Explanation of the Reference Numerals in the Drawings

[0027] 1. Slow-speed centrifugal droplet separator; 2. Intake pipeline; 3. Water tank; 4. First water pump; 5. Second water pump; 6. Liquid level sensor; 7. Make-up water solenoid valve; 8. External water source; 9. Pressure balance pipe; 10. Flowmeter; 11. First pressure regulating valve; 12. Exhaust fan; 13. Filter; 14. Branch valve; 15. Differential pressure gauge; 16. Second pressure regulating valve. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. 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. The following will describe the implementation manners according to the overall structure of the present utility model.

[0030] Please refer to Figure 1 , the present utility model discloses a wet dust removal device, which includes a slow-speed centrifugal droplet separator 1, an air inlet unit, a water inlet unit, and a filtration unit; wherein,

[0031] The slow-speed centrifugal droplet separator 1 is successively provided with an air outlet, an air inlet, and a liquid outlet from top to bottom;

[0032] The air inlet unit includes an air inlet pipe 2 that is connected to the air inlet of the slow-speed centrifugal droplet separator 1;

[0033] The water inlet unit includes a water tank 3. The water collecting port of the water tank 3 is connected to the liquid outlet of the slow-speed centrifugal droplet separator 1, and the first water outlet of the water tank 3 is connected between the body and the air inlet of the slow-speed centrifugal droplet separator 1 through a first water pump 4;

[0034] The filtration unit is connected between the first water inlet and the second water outlet of the water tank 3 through a second water pump 5. The filtration unit includes at least two parallel filtration branches; in the height direction of the water tank 3, the first water outlet is lower than the first water inlet and higher than the second water outlet.

[0035] With the above structure, the waste gas generated in the production process of the polyester resin product can be collected (using a gas collecting hood) and then transported to the slow-speed centrifugal droplet separator 1 through the intake pipe 2 included in the intake unit. At the same time, using the first water pump 4, the condensed liquid (such as tap water) stored in the water tank 3 can be pumped into the slow-speed centrifugal droplet separator 1. Thus, the waste gas airflow can move relative to the condensed liquid and be fully mixed. As a result, the condensates and condensed droplets in the waste gas accumulate, gradually forming sludge droplets in the slow-speed centrifugal droplet separator 1 and separating from the airflow. Then, they fall into the water tank 3 through the water collecting port connected to the liquid outlet of the water tank 3 and the slow-speed centrifugal droplet separator 1. After the waste gas removes the condensates, it becomes clean gas, which can be directly discharged from the gas outlet of the slow-speed centrifugal droplet separator 1. A filtering unit is provided between the first water inlet and the second water outlet of the water tank 3. With the help of the second water pump 5, the water containing sludge droplets in the water tank 3 can be self-circulated and filtered through the filtering unit to remove the condensates. The filtered condensed liquid will be pumped back into the water tank 3 for recycling, thus being able to continuously maintain an excellent dust removal effect, effectively improving the utilization efficiency of the circulating water, reducing the generation of waste water, and lowering the subsequent waste water treatment cost. Among them, the filtering unit includes at least two parallel filtering branches, which can be set to perform filtering operations separately, ensuring that the waste gas treatment operation can still continue during the process of cleaning the filtering branch, and ensuring the production efficiency. In the height direction of the water tank 3, the first water outlet of the water tank 3 is lower than the first water inlet and higher than the second water outlet, ensuring that the condensed liquid containing sludge droplets can be effectively filtered and cleaned through the filtering unit.

[0036] Please refer to Figure 1 , specifically, in this embodiment, the intake unit further includes a liquid level sensor 6 and a water replenishing solenoid valve 7. The water replenishing solenoid valve 7 is provided on the connecting pipe between the second water inlet of the water tank 3 and the external water source 8. The liquid level sensor 6 is electrically connected to the water replenishing solenoid valve 7. When it monitors that the water level in the second water tank 3 drops to the preset lower limit position, it controls the water replenishing solenoid valve 7 to open, thus connecting the second water inlet of the water tank 3 to the external water source 8 to replenish water to the water tank 3; when it monitors that the water level in the second water tank 3 is replenished to the preset upper limit position, it can control the water replenishing solenoid valve 7 to close.

[0037] Specifically, in this embodiment, the second water inlet of the water tank 3 is higher than its second water outlet, so that the impact on the part of the condensed liquid containing sludge droplets during the water replenishing process of the water tank 3 is minimized, thereby avoiding the range of the up and down movement of the sludge droplets in the condensed liquid, so that as many sludge droplets as possible flow to the filtering unit from the second water outlet earlier and are filtered out. Preferably, the second water inlet of the water tank 3 is higher than its first water outlet.

[0038] Specifically, in this embodiment, a pressure balance pipe 9 is also connected between the air inlet of the slow-speed centrifugal droplet separator 1 and the water tank 3 to balance the internal pressure between the slow-speed centrifugal droplet separator 1 and the water tank 3, so that the sludge droplets can smoothly drip from the slow-speed centrifugal droplet separator 1 into the water tank 3.

[0039] Specifically, in this embodiment, a flow meter 10 and a first pressure regulating valve 11 are also provided on the pipeline connecting the first water outlet of the water tank 3 and the slow-speed centrifugal droplet separator 1, so as to monitor and adjust the flow rate of the condensed liquid pumped from the water tank 3 into the slow-speed centrifugal droplet separator 1 in real time.

[0040] Specifically, in this embodiment, an exhaust fan 12 is connected to the air outlet of the slow-speed centrifugal droplet separator 1 to accelerate the discharge speed of the separated clean gas.

[0041] Specifically, in this embodiment, the second water pump 5 is arranged between the inlet of the filtering unit and the second water outlet of the water tank 3 to pump the condensed liquid containing sludge droplets in the water tank 3 to the filtering unit for filtration, and then the filtered condensed liquid is returned to the water tank 3 for recycling. Of course, in other embodiments, the second water pump 5 can also be arranged between the outlet of the filtering unit and the first water inlet of the water tank 3.

[0042] Specifically, in this embodiment, the filtering unit includes two parallel filtering branches, and each filtering branch includes a filter 13 and a branch valve 14. Correspondingly, when a branch valve 14 is opened, the filter 13 on the corresponding filtering branch will be connected to the second water outlet of the water tank 3 to filter the condensed liquid containing sludge droplets flowing out of the second water outlet of the water tank 3.

[0043] Specifically, in this embodiment, a differential pressure gauge 15 interface is provided between the inlet and the outlet of each filter 13 to connect a differential pressure gauge 15. The differential pressure gauge 15 can detect the pressure difference before and after the filter 13 to judge the blockage condition of the filter 13. When the differential pressure gauge 15 reaches a set value (such as a pressure difference of 1 bar), it is determined that the filter bag in the corresponding filter 13 has been blocked and needs to be cleaned. Since the differential pressure gauge 15 is correspondingly electrically connected to the branch valve 14, the branch valve 14 can be controlled to close. At this time, the filter 13 on this filtering branch can be cleaned without affecting the filtering operation of the other filtering branch. Preferably, the two filtering branches can be configured by the control terminal to work in an alternate standby mode and do not work simultaneously. After the differential pressure gauge 15 on the normally used filtering branch reaches the set value, the filtering work automatically switches to the standby filtering branch to ensure the continuous operation of the entire device.

[0044] Specifically, in this embodiment, a second pressure regulating valve 16 is further provided between the filtering unit and the second water outlet of the water tank 3, which can adjust the flow rate of the condensed liquid containing silt drops flowing from the water tank 3 to the filtering unit, or can be manually closed directly when the condensed liquid in the water tank 3 contains few silt drops, so as to facilitate the cleaning or replacement of the filter bags used in each filtering branch of the filtering unit.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any changes, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wet dust removal device, characterized in that, It includes a slow-speed centrifugal droplet separator, an air inlet unit, a water inlet unit and a filtration unit; among them, The slow-speed centrifugal droplet separator is successively provided with an air outlet, an air inlet and a liquid outlet from top to bottom; The air inlet unit includes an air inlet pipe that is connected to the air inlet of the slow-speed centrifugal droplet separator; The water inlet unit includes a water tank, the water collection port of the water tank is connected to the liquid outlet of the slow-speed centrifugal droplet separator, and the first water outlet of the water tank is connected to the body and the air inlet of the slow-speed centrifugal droplet separator through a first water pump; The filtration unit is connected between the first water inlet and the second water outlet of the water tank through a second water pump, and the filtration unit includes at least two parallel filtration branches; in the height direction of the water tank, the first water outlet is lower than the first water inlet and higher than the second water outlet.

2. The wet dust removal device according to claim 1, characterized in that, The water inlet unit further includes a liquid level sensor and a water replenishing solenoid valve; The water replenishing solenoid valve is arranged on the connecting pipe between the second water inlet of the water tank and an external water source; The liquid level sensor is electrically connected to the water replenishing solenoid valve to control the opening and closing of the water replenishing solenoid valve.

3. The wet dust removal device according to claim 2, characterized in that, The second water inlet of the water tank is higher than its second water outlet.

4. The wet dust removal device according to claim 1, characterized in that A pressure balance pipe is also connected between the air inlet of the slow-speed centrifugal droplet separator and the water tank.

5. The wet dust removal device according to claim 1, characterized in that, A flow meter and a first pressure regulating valve are also arranged on the pipeline connecting the first water outlet of the water tank and the slow-speed centrifugal droplet separator.

6. The wet dust removal device according to claim 1, characterized in that An exhaust fan is connected to the air outlet of the slow-speed centrifugal droplet separator.

7. The wet dust removal device according to claim 1, characterized in that, The second water pump is arranged between the inlet of the filtration unit and the second water outlet of the water tank; or between the outlet of the filtration unit and the first water inlet of the water tank.

8. The wet dust removal device according to claim 7, characterized in that, Each of the filtration branches includes a filter and a branch valve, and the filter is connected to the second water outlet of the water tank through the branch valve.

9. The wet dust removal device according to claim 8, characterized in that, A differential pressure gauge interface is arranged between the inlet and the outlet of each filter to connect a differential pressure gauge, and the differential pressure gauge is electrically connected to the branch valve to control the opening and closing of the branch valve.

10. The wet dust removal device according to claim 7, characterized in that, A second pressure regulating valve is also arranged between the filtration unit and the second water outlet of the water tank.

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