Coal-fired flue gas multi-stage water filtration dust removal equipment

Abstract

The utility model discloses coal-fired flue gas multi-stage water filtration dust removal equipment, which belongs to the technical field of flue gas dust removal and comprises a gas inlet pipe externally connected with flue gas, the tail end of the gas inlet pipe is communicated with a gas washing bin, a high-pressure water pump is arranged on the left side of the gas washing bin, and a water outlet of the high-pressure water pump is communicated with a water spray pipe. The inner wall of the left side of the gas washing bin is provided with a high-pressure nozzle communicated with the water spraying pipe, the right side of the gas washing bin is provided with a cleaning door, the bottom of the gas washing bin is provided with an aeration pipe assembly, the top of the gas washing bin is communicated with a gas outlet pipe, the lower portion of the middle of the gas outlet pipe is communicated with an atomizing pipe, and the lower end of the atomizing pipe is communicated with an atomizer; the tail end of the gas outlet pipe is communicated with a cyclone dust collector, the top of the cyclone dust collector is communicated with a water filtering mechanism, and the top of the water filtering mechanism is communicated with an exhaust pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas dust removal technical field, concretely relates to a kind of coal-fired flue gas multistage water filter dust removal equipment. BACKGROUND

[0002] The dust in coal-fired flue gas mainly comes from the residue after coal combustion. Coal contains various minerals, such as silicates and metal oxides, which cannot be completely burned during combustion and form particulate matter. These particulate matters have different particle sizes, which can be classified as PM10, PM2.5, etc. The production process needs to be explained in detail, such as how factors such as combustion temperature, coal composition, and combustion efficiency affect the amount of dust produced. Next is the pollution of the environment. Dust emissions into the atmosphere can reduce air quality, cause smog, and affect visibility. PM2.5 can penetrate deep into the lungs and even enter the bloodstream, which is harmful to human health, such as causing respiratory diseases and cardiovascular diseases. In addition, dust settles on the ground and water bodies, which can pollute the soil and water sources and affect crop growth and aquatic life. Acid rain is also a possible consequence, as some components in dust may react with water vapor to form acidic substances. In addition, heavy metals such as mercury and lead in dust have bioaccumulation properties, and long-term accumulation can cause long-term harm to the ecosystem.

[0003] Currently, the low efficiency of coal-fired flue gas dust removal is one of the key problems restricting industrial pollution control. Although traditional dust removal technologies such as electrostatic precipitation and bag dust removal have been widely used, they still face multiple challenges in actual operation: on the one hand, the capture efficiency of high-concentration and fine particulate matter (such as PM2.5) is limited by equipment performance; on the other hand, the equipment operation stability is insufficient, especially when the flue gas temperature, humidity fluctuates or the coal quality changes, which easily causes bag breaking, electrode dust accumulation, etc., resulting in a sharp drop in dust removal efficiency. In addition, due to cost pressure, some areas simplify the operation and maintenance process, which further exacerbates the uncontrollability of dust removal efficiency. This inefficient state not only exacerbates air pollution.

[0004] To solve the above problems, a high-efficiency and low-energy coal-fired flue gas dust removal equipment is needed. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the utility model provides a kind of coal-fired flue gas multistage water filter dust removal equipment.

[0006] The utility model discloses a technical scheme is: a kind of coal-fired flue gas multistage water filter dust removal equipment, including the gas inlet pipe of external connection flue gas, the tail end of the gas inlet pipe is connected with washing gas storehouse, the left side of washing gas storehouse is equipped with high-pressure water pump, the water outlet of high-pressure water pump is connected with water jet pipe, the left side inner wall of washing gas storehouse is equipped with the high-pressure nozzle of being connected with water jet pipe, the right side of washing gas storehouse is equipped with cleaning door, the bottom of washing gas storehouse is equipped with aeration pipe assembly, the top of washing gas storehouse is connected with the gas outlet pipe, the middle lower portion of the gas outlet pipe is connected with atomizing pipe, the lower end of atomizing pipe is connected with atomizer, the tail end of the gas outlet pipe is connected with cyclone dust collector, the top of cyclone dust collector is connected with filter water mechanism, the top of filter water mechanism is connected with exhaust pipe.

[0007] Further, the aeration pipe assembly includes a main pipe, a plurality of branch pipes are connected to the two sides of the main pipe, a plurality of air injection heads are connected to the top of the branch pipes, and a plurality of micropores are arranged on the surface of the air injection heads.

[0008] Description: the area of aeration is increased by the air injection head with micropores, and the flue gas contacts water in the water, and the dust in the flue gas falls into the water.

[0009] Further, the atomizer includes an atomizing chamber connected to the atomizing pipe, an ultrasonic atomizing sheet is arranged at the bottom of the atomizing chamber, and an atomizing water pump is arranged at the right side of the atomizing chamber.

[0010] Description: the dust in the flue gas mixes with the water mist generated by the atomizer, and the water mist adheres to the surface of the dust, so that the mass of the dust increases.

[0011] Further, the cyclone dust collector includes a dust removal chamber, a filter water collection box is connected to the lower end of the dust removal chamber, a drain pipe is connected to the side wall of the filter water collection box, and a cleaning sealing door is arranged at the bottom left side of the filter water collection box.

[0012] Description: the centrifugal force generated by the cyclone dust collector is used to make the dust and water mist mixture heavier, so that the mixture is gathered on the inner wall of the dust removal chamber and then falls into the filter water collection box, the waste water is discharged through the drain pipe, and the dust precipitated at the bottom of the filter water collection box is cleaned through the cleaning sealing door.

[0013] Further, the filter water mechanism includes a fixing member, the outer wall of the fixing member is threadedly connected to the top of the cyclone dust collector, an air duct is arranged at the middle of the fixing member, the top of the air duct is connected to the exhaust pipe, and a dehumidification filter element is threadedly connected to the lower end of the fixing member.

[0014] Description: the air with high humidity is filtered again through the dehumidification filter element, the water mist is gathered on the surface of the dehumidification filter element to form water droplets, and the water droplets fall into the filter water collection box.

[0015] The utility model has the beneficial effects that:

[0016] The utility model discloses a washing gas mode is used to make the dust in the empty flue gas reduce fast, then through the mixture of water mist and the dust in the flue gas, improve the weight of dust, again in cyclone dust collector, through centrifugal force separates the dust, finally again to the mixture of little water mist and dust in the flue gas through the dehumidification filter core filtration, the utility model discloses through multiple water filter processing, has improved the removal efficiency of dust in the flue gas, and the efficiency of removing the dust in the flue gas through the water filter is higher than electrostatic precipitation, and the effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Among them, 1 - inlet pipe, 2 - washing gas warehouse, 21 - high pressure water pump, 22 - water jet pipe, 23 - high pressure nozzle, 24 - clean door, 25 - aeration pipe assembly, 3 - outlet pipe, 4 - atomizing pipe, 5 - atomizer, 6 - cyclone dust collector, 7 - water filtering mechanism, 8 - exhaust pipe, 251 - main pipeline, 252 - branch pipe, 253 - air jet head, 254 - micropore, 51 - atomizing warehouse, 52 - ultrasonic atomizing sheet, 53 - atomizing water pump, 61 - dust removal warehouse, 62 - water filtering collection box, 63 - drain pipe, 64 - clean sealing door, 71 - fixed part, 72 - airway, 73 - dehumidification filter core. DETAILED DESCRIPTION

[0019] Example 1:

[0020] As Figure 1 Shown, a kind of coal-fired flue gas multistage water filter dust removal equipment, including the inlet pipe 1 of external connection flue gas, the tail end of inlet pipe 1 is connected with washing gas warehouse 2, the left side of washing gas warehouse 2 is equipped with high pressure water pump 21, the water outlet of high pressure water pump 21 is connected with water jet pipe 22, the left side inner wall of washing gas warehouse 2 is equipped with the high pressure nozzle 23 being connected with water jet pipe 22, the right side of washing gas warehouse 2 is equipped with clean door 24, the bottom of washing gas warehouse 2 is equipped with aeration pipe assembly 25, the top of washing gas warehouse 2 is connected with outlet pipe 3, the middle lower part of outlet pipe 3 is connected with atomizing pipe 4, the lower end of atomizing pipe 4 is connected with atomizer 5, the tail end of outlet pipe 3 is connected with cyclone dust collector 6, the top of cyclone dust collector 6 is connected with water filtering mechanism 7, the top of water filtering mechanism 7 is connected with exhaust pipe 8.

[0021] Aeration pipe assembly 25 includes main pipeline 251, and the two sides of main pipeline 251 are connected with multiple branch pipes 252, and the top of branch pipe 252 is connected with multiple air jet heads 253, and the surface of air jet head 253 is equipped with several micropores 254.

[0022] Through air jet head 253 increase the area of micropore aeration, flue gas contacts with water in water, and the dust in flue gas falls into water.

[0023] The atomizer 5 comprises an atomizing chamber 51 in communication with the atomizing pipe 4, the bottom of the atomizing chamber 51 is provided with an ultrasonic atomizing sheet 52, and the right side of the atomizing chamber 51 is provided with an atomizing water pump 53, and the water outlet of the atomizing water pump 53 is in communication with the right side of the atomizing chamber 51.

[0024] The dust in the flue gas mixes with the water mist generated by the atomizer 4, and the water mist adheres to the surface of the dust, increasing the mass of the dust.

[0025] The cyclone dust collector 6 comprises a dust removal chamber 61, the lower end of the dust removal chamber 61 is in communication with a filter water collecting box 62, the side wall of the filter water collecting box 62 is in communication with a drain pipe 63, and the bottom left side of the filter water collecting box 62 is provided with a clean-up sealing door 64.

[0026] Due to the centrifugal force generated by the cyclone dust collector 6, the dust and water mist mixture is relatively heavy, and after gathering on the inner wall of the dust removal chamber 61, it falls into the filter water collecting box 62, the waste water is discharged through the drain pipe 63, and the dust deposited at the bottom of the filter water collecting box 62 is cleaned through the clean-up sealing door 64.

[0027] The filter water mechanism 7 comprises a fixing member 71, the outer wall of the fixing member 71 is threadedly connected with the top of the cyclone dust collector 6, the middle part of the fixing member 71 is provided with an air duct 72, the top of the air duct 72 is in communication with the exhaust pipe 8, and the lower end of the fixing member 71 is threadedly connected with a dehumidification filter element 73.

[0028] The air with high humidity is filtered again through the dehumidification filter element 73, the water mist gathers on the surface of the dehumidification filter element 73 to form water droplets, and the water droplets fall into the filter water collecting box 62.

[0029] The working method of the above embodiment comprises the following steps:

[0030] S1, the coal-fired flue gas is introduced into the aeration pipe assembly 25 in the gas washing chamber 2 through the air inlet pipe 1, the flue gas enters the branch pipe 252 through the main pipe 251, and finally is discharged into the gas washing chamber 2 through the air injection head 253, high-pressure water is pumped into the gas suction chamber 2 through the high-pressure water pump 21, and the high-pressure water jet head 23 sprays high-pressure water to wash the sediment at the bottom of the gas washing chamber 2, and the sediment is discharged through the clean-up door 24;

[0031] S2, after the dust in the flue gas falls into the water in the gas washing chamber 2, the flue gas containing a small amount of dust is discharged into the cyclone dust collector 6 through the air outlet pipe 3, the atomizer 5 generates water mist through the ultrasonic atomizing sheet 52, the atomizing water pump 53 provides water source for the atomizing chamber 51, the water mist mixes with the flue gas containing a small amount of dust, the water mist adheres to the surface of the dust, increasing the weight of the dust, and forming a mixture of water mist and dust;

[0032] S3, the mixture of water mist and dust cyclone dust collector 6, under the action of centrifugal force, water mist and dust mixture in the wall of dust collection bin 61 after the gathering flow into the filter water collection box 62, containing trace dust and water mist mixture under the action of airflow, by the dehumidification filter core 73, the waste water in the filter water collection box 62 is discharged through the drain pipe 63, the sediment is cleaned through the clean pollution sealing door 64.

[0033] The high-pressure water pump 21, the ultrasonic atomizing sheet 52, the atomizing water pump 53 and the dehumidification filter core 73 in the above embodiment are all commercially available products, as long as the function of the utility model can be realized, the person skilled in the art can select and use according to the conventional knowledge, which is not specially limited here.

Claims

1. A multi-stage water filtering dust removal equipment for coal-fired flue gas, characterized in that, The utility model provides an exhaust gas washing device, including the air inlet pipe (1) of external connection exhaust gas, the end of air inlet pipe (1) is linked with the gas washing storehouse (2), the left side of gas washing storehouse (2) is equipped with high pressure water pump (21), the water outlet of high pressure water pump (21) is linked with the water jet pipe (22), the left side inner wall of gas washing storehouse (2) is equipped with the high pressure shower head (23) with water jet pipe (22) intercommunication, the right side of gas washing storehouse (2) is equipped with the dirt door (24), the bottom of gas washing storehouse (2) is equipped with aeration pipe subassembly (25), the top of gas washing storehouse (2) is linked with the air outlet pipe (3), the middle portion below of air outlet pipe (3) is linked with the atomizing pipe (4), the lower end of atomizing pipe (4) is linked with the atomizer (5), the end of air outlet pipe (3) is linked with the cyclone dust collector (6), the top of cyclone dust collector (6) is linked with the water filtering mechanism (7), the top of water filtering mechanism (7) is linked with the exhaust pipe (8).

2. A multi-stage water filtering dust removal device for coal-fired flue gas according to claim 1, characterized in that, The aeration pipe subassembly (25) includes a main pipe (251), the two sides of the main pipe (251) are connected with a plurality of branch pipes (252), the top of the branch pipe (252) is connected with a plurality of air injection heads (253), the surface of the air injection head (253) is provided with a plurality of micropores (254).

3. A multi-stage water filtering dust removal equipment for coal-fired flue gas according to claim 1, characterized in that, The atomizer (5) includes an atomizing chamber (51) connected with the atomizing pipe (4), the bottom of the atomizing chamber (51) is provided with an ultrasonic atomizing sheet (52), the right side of the atomizing chamber (51) is provided with an atomizing water pump (53), the water outlet of the atomizing water pump (53) is connected with the right side of the atomizing chamber (51).

4. A multi-stage water filtering dust removal device for coal-fired flue gas according to claim 1, characterized in that, The cyclone dust collector (6) includes a dust removal chamber (61), the lower end of the dust removal chamber (61) is connected with a water filtering and collecting box (62), the sidewall of the water filtering and collecting box (62) is connected with a drain pipe (63), the bottom left side of the water filtering and collecting box (62) is provided with a dirt sealing door (64).

5. A multi-stage water filtering dust removal device for coal-fired flue gas according to claim 1, characterized in that, The water filtering mechanism (7) includes a fixing member (71), the outer wall of the fixing member (71) is threadedly connected with the top of the cyclone dust collector (6), the middle part of the fixing member (71) is provided with an air duct (72), the top of the air duct (72) is connected with the exhaust pipe (8), the lower end of the fixing member (71) is threadedly connected with a dehumidifying filter element (73).

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