Wet dust removal equipment for dust and flue gas

Abstract

The utility model relates to the technical field of flue gas purification, in particular to dust and flue gas wet type dust removal equipment which comprises wet type dust removal reverse spraying washing equipment, a gas collecting pipe, an induced draft fan and a spraying pump, and water film falling spraying tower equipment is further arranged on the side face of the wet type dust removal reverse spraying washing equipment in parallel. An exhaust connecting pipe is communicated between the air outlet end above the wet dust removal reverse spraying washing equipment and the air inlet end of the side face of the water film falling spraying tower equipment, an exhaust pipe is arranged between the air outlet end above the water film falling spraying tower equipment and the induced draft fan, the air collecting pipe is vertically arranged, and a wet tower air inlet pipe communicated with the air collecting pipe is arranged on the side face of the wet dust removal reverse spraying washing equipment. According to the dust and flue gas wet-type dust removal equipment, a wet-type dust removal reverse spraying washing equipment technology and a water film falling spraying tower equipment technology are combined, the dust removal efficiency is effectively improved on the premise that the environmental protection requirement is met, meanwhile, the structure is simple, on-site land is saved, operation and management are convenient, and the system investment cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, in particular to wet dust removal equipment for dusty flue gas. Background Art

[0002] In order to ensure that the smoke dust emitted from the pulping tank discharged from the suspended roasting waste heat boiler during the production process can meet environmental protection requirements, the exhaust gas from the drying furnace must be dust removed to ensure that the smoke meets emission standards.

[0003] Existing dust and flue gas dust removal usually adopts wet dust removal tower for dust removal treatment, such as a wet dust removal equipment disclosed in publication number CN107308754A, in which dust-containing flue gas enters the wet dust removal tower, is dusted by spraying water and dust removal filler, and then is separated into steam and water by a demister, and finally the flue gas and sewage are discharged separately. However, with the increase of factory output, the flue gas treatment capacity of the wet dust removal tower is also increased. At present, the wet dust removal equipment has the problem of low working efficiency, resulting in low dust removal rate in the flue gas, which affects the flue gas emission. Utility Model Content

[0004] The purpose of the utility model is to provide a wet dust removal equipment for dust and flue gas, so as to solve the problem raised by the above background technology that the wet dust removal equipment for dust and flue gas on the market currently works at high load and has low working efficiency, resulting in low dust removal rate in flue gas and affecting flue gas emissions.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a dust and flue gas wet dust removal equipment, comprising a wet dust removal reverse jet washing equipment, an air collecting pipe, an induced draft fan and a spray pump, the side of the wet dust removal reverse jet washing equipment is also provided with a water film precipitation tower equipment installed in parallel, and the upper air outlet end of the wet dust removal reverse jet washing equipment and the side air inlet end of the water film precipitation tower equipment are connected with an exhaust connecting pipe, and an exhaust pipe is arranged between the upper air outlet end of the water film precipitation tower equipment and the induced draft fan, the air collecting pipe is arranged vertically, and a wet tower air inlet pipe connected to the air collecting pipe is arranged on the side of the wet dust removal reverse jet washing equipment, and an air inlet pipe spray pipe and an air collecting pipe spray pipe of the same structure are respectively installed in the wet tower air inlet pipe and the air collecting pipe, and the bottoms of the wet dust removal reverse jet washing equipment and the water film precipitation tower equipment are connected with a sewage pipe through a pneumatically controlled quick-opening valve.

[0006] Preferably, a twill dust removal filler support plate is clamped and installed above the side air inlet on the inner side of the wet dust removal reverse jet washing equipment, and at least three first spray pipes are installed in parallel above the upper end filler of the twill dust removal filler support plate in the wet dust removal reverse jet washing equipment.

[0007] Preferably, a venturi tube filler is installed above the side air inlet on the inner side of the water film precipitation tower equipment, and at least three second spray pipes arranged in parallel are provided above the venturi tube filler.

[0008] Preferably, a twill dust removal filler support plate which is clamped and installed with the water film precipitation tower equipment is provided above the second spray pipe, and at least three high-pressure flushing pipes are installed in parallel above the upper end filler of the twill dust removal filler support plate in the water film precipitation tower equipment.

[0009] Preferably, a fan spray pipe is arranged in the induced draft fan, and the first spray pipe, the air intake pipe spray pipe, the high-pressure flushing pipe, the second spray pipe, the fan spray pipe and the air collecting pipe spray pipe are all connected to the spray pump through pipe fittings.

[0010] Preferably, a reducing hose is fixed to the portion where the exhaust pipe is connected to the induced draft fan via a pipe fitting, and a pipe with a control valve is installed at the lowest point of the exhaust pipe near one end of the reducing hose.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the dust and flue gas wet dust removal equipment combines the wet dust removal reverse spray washing equipment technology and the water film precipitation tower equipment technology, effectively improving the dust removal efficiency under the premise of meeting environmental protection requirements, and at the same time, the structure is simple, saving on-site land, convenient operation and management, and can save system investment costs. The dust and flue gas wet dust removal equipment sets the gas collecting pipe vertically, and installs the gas collecting pipe spray pipe in the gas collecting pipe, which can make the dust settle in the processing equipment and remove part of the dust. At the same time, a spray structure is also set in the induced draft fan, which can clean the fan, greatly reduce the blockage accident of the fan, and further remove the dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the connection structure of a dust and fume wet dust removal device of the utility model;

[0013] Figure 2 This is a top view of a dust and fume wet dust removal device of the utility model;

[0014] Figure 3 It is a schematic diagram of the distribution structure of the first spray pipe in the wet dust removal reverse spray washing device of the dust and flue gas wet dust removal equipment of the utility model;

[0015] Figure 4 This is a schematic diagram of the distribution structure of high-pressure flushing pipes in a water film precipitation tower device of a dust and flue gas wet dust removal device of the utility model;

[0016] Figure 5 This is a schematic diagram of the structure of a filler support plate of a dust and flue gas wet dust removal device of the utility model;

[0017] Figure 6 It is a schematic diagram of the installation structure of the air collecting pipe spray pipe in the air collecting pipe of the dust and fume wet dust removal equipment of the utility model;

[0018] Figure 7 This is a flow chart of a dust and flue gas wet dust removal device of the utility model.

[0019] In the figure: 1. Wet dust removal reverse spray washing equipment; 101. First spray pipe; 102. Wet tower air inlet pipe; 103. Air inlet pipe spray pipe; 104. Exhaust connecting pipe; 2. Water film precipitation tower equipment; 201. High-pressure flushing pipe; 202. Second spray pipe; 203. Venturi tube filler; 204. Exhaust pipe; 205. Variable diameter hose; 3. Induced draft fan; 301. Fan spray pipe; 4. Gas collecting pipe; 401. Gas collecting pipe spray pipe; 5. Twill dust removal filler support plate; 6. Spray pump; 7. Sewage pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-7The utility model provides a technical solution: a dust and flue gas wet dust removal equipment, including a wet dust removal reverse spray washing equipment 1, an air collecting pipe 4, an induced draft fan 3 and a spray pump 6. The side of the wet dust removal reverse spray washing equipment 1 is also provided with a water film precipitation tower equipment 2 installed in parallel. The inside of the wet dust removal reverse spray washing equipment 1 is clamped and installed with a twill dust removal filler support plate 5 above the side air inlet, and at least three first spray pipes 101 are installed in parallel above the upper end filler of the twill dust removal filler support plate 5 in the wet dust removal reverse spray washing equipment 1. This structure adopts the traditional wet dust removal reverse spray washing equipment 1, and the dust is settled by the reverse spray technology to achieve preliminary dust removal. By reasonably arranging the spray nozzles on the first spray pipe 101, the spray The area is covered with a twill dust removal filler, and the upper air outlet end of the wet dust removal reverse spray washing equipment 1 is connected to the side air inlet end of the water film precipitation tower equipment 2 by an exhaust connecting pipe 104, and an exhaust pipe 204 is arranged between the upper air outlet end of the water film precipitation tower equipment 2 and the induced draft fan 3, and a venturi filler 203 is installed on the inner side of the water film precipitation tower equipment 2 above the side air inlet, and at least three parallel second spray pipes 202 are arranged above the venturi filler 203. This structure enables the water film precipitation tower equipment 2 to spray the venturi filler 203 through the second spray pipe 202, thereby improving the dust removal efficiency of the flue gas, and a twill dust removal filler support plate 5 which is clamped and installed with the water film precipitation tower equipment 2 is arranged above the second spray pipe 202, and the water film precipitation tower equipment 2 is inside the twill At least three high-pressure flushing pipes 201 are installed in parallel above the upper end filler of the twill dust removal filler support plate 5. This structure enables the water film precipitation tower equipment 2 to support and fix the twill dust removal filler through the twill dust removal filler support plate 5, and the high-pressure flushing pipe 201 sprays the twill dust removal filler to form a water film on the twill dust removal filler, and performs dust removal when the flue gas passes through the water film. Defoggers are arranged on the top of the wet dust removal reverse spray washing equipment 1 and the water film precipitation tower equipment 2 for water vapor separation. The air collecting pipe 4 is arranged vertically, and a wet tower air inlet pipe 102 connected to the air collecting pipe 4 is arranged on the side of the wet dust removal reverse spray washing equipment 1, and the wet tower air inlet pipe 102 and the air collecting pipe 4 are respectively installed with an air inlet pipe spray pipe 103 and a The air collecting pipe spray pipe 401, the part where the exhaust pipe 204 is connected to the induced draft fan 3 is fixed with a reducing hose 205 through a pipe fitting, and a pipe with a control valve is installed at the lowest point of the exhaust pipe 204 near one end of the reducing hose 205. This structure can discharge the sewage generated by spraying and flushing in the induced draft fan 3 from the lowest point of the exhaust pipe 204 through the reducing hose 205. The bottoms of the wet dust removal reverse spray washing equipment 1 and the water film precipitation tower equipment 2 are both connected to the sewage pipe 7 through a pneumatically controlled quick-opening valve. The fan spray pipe 301 is arranged in the induced draft fan 3, and the first spray pipe 101, the air inlet pipe spray pipe 103, the high-pressure flushing pipe 201, the second spray pipe 202, the fan spray pipe 301 and the air collecting pipe spray pipe 401 are all connected to the spray pump 6 through pipe fittings.When the spray pump 6 is used to pump the spray water into the spray pipe, the spray water is filtered by the basket filter. The first spray pipe 101, the air intake pipe spray pipe 103, the high-pressure flushing pipe 201, the second spray pipe 202, the fan spray pipe 301 and the air collection pipe spray pipe 401 are automatically controlled by pneumatic valves. The fan spray pipe 301 flushes the induced draft fan 3 to avoid dust blockage in the induced draft fan 3. At the same time, the dust is further removed, the dust removal rate is improved, and the flue gas dust removal efficiency is improved. Existing flow meters and pressure gauges are arranged on each pipeline, and the distributor works in coordination to realize automatic spray control processing.

[0022] Working principle: When using the dust and flue gas wet dust removal equipment, first, the dust-containing flue gas flows upward through the air collecting pipe 4, and the air collecting pipe spray pipe 401 sprays water mist. The airflow will accelerate when passing through the reverse spray section, and form water curtain bubbles at the inlet end of the wet dust removal reverse spray washing equipment 1, and the water curtain bubbles will absorb the dust in the air. Then the flue gas enters the wet dust removal reverse spray washing equipment 1 through the wet tower air inlet pipe 102. The flue gas is dusted through the air inlet pipe spray pipe 103 in the wet tower air inlet pipe 102. Then, the flue gas is separated into gas and liquid by the centrifugal force generated by entering the wet dust removal reverse spray washing equipment 1. The liquid carrying dust falls to the bottom of the wet dust removal reverse spray washing equipment 1, and the flue gas continues to flow upward, passes through the twill dust removal filler support plate 5, and is sprayed by the first spray pipe 101 on the twill dust removal filler by spraying the water formed. The film is used for dust removal, and then the flue gas enters the water film precipitation tower equipment 2 through the exhaust connecting pipe 104. The water film precipitation tower equipment 2 is dust-removed again through the venturi filler 203 and the twill dust removal filler, so as to increase the smoke dust treatment capacity and improve the dust removal efficiency. The high-pressure flushing pipe 201 and the second spray pipe 202 are respectively used for the formation of water film in the water film precipitation tower equipment 2. Then the induced draft fan 3 makes the flue gas in the water film precipitation tower equipment 2 be discharged through the exhaust pipe 204. The sewage generated by the induced draft fan 3 after spraying through the fan spray pipe 301 reaches the lowest point of the exhaust pipe 204 through the reducing hose 205 and is discharged, and the purified flue gas is discharged through the induced draft fan 3. The sewage in the wet dust removal reverse spray washing equipment 1 and the water film precipitation tower equipment 2 is discharged through the sewage pipe 7 for centralized treatment. The spray pump 6 is used for the supply of spray water, thereby completing a series of tasks.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust and flue gas wet dust removal device, comprising a wet dust removal reverse spray washing device (1), a gas collecting pipe (4), an induced draft fan (3) and a spray pump (6), characterized in that: The side of the wet dust removal reverse jet washing equipment (1) is also provided with a water film precipitation tower equipment (2) installed in parallel, and the upper air outlet of the wet dust removal reverse jet washing equipment (1) is connected to the side air inlet of the water film precipitation tower equipment (2) through an exhaust connecting pipe (104), and an exhaust pipe (204) is arranged between the upper air outlet of the water film precipitation tower equipment (2) and the induced draft fan (3). The air collecting pipe (4) is arranged vertically, and the side of the wet dust removal reverse jet washing equipment (1) is provided with a wet tower air inlet pipe (102) connected to the air collecting pipe (4), and the wet tower air inlet pipe (102) and the air collecting pipe (4) are respectively installed with an air inlet pipe spray pipe (103) and an air collecting pipe spray pipe (401) of the same structure. The bottoms of the wet dust removal reverse jet washing equipment (1) and the water film precipitation tower equipment (2) are both connected to a sewage pipe (7) through a pneumatically controlled quick-opening valve.

2. The dust and flue gas wet dust removal equipment according to claim 1 is characterized in that: A twill dust removal filler support plate (5) is mounted on the inside of the wet dust removal reverse jet washing device (1) above the side air inlet, and at least three first spray pipes (101) are mounted in parallel above the upper end filler of the twill dust removal filler support plate (5) inside the wet dust removal reverse jet washing device (1).

3. The dust and fume wet dust removal equipment according to claim 1 is characterized in that: A venturi filler (203) is installed on the inner side of the water film precipitation tower device (2) above the side air inlet, and at least three second spray pipes (202) arranged in parallel are provided above the venturi filler (203).

4. The dust and fume wet dust removal equipment according to claim 3 is characterized in that: A twill dust removal filler support plate (5) is provided above the second spray pipe (202) and is mounted to be snap-fitted to the water film precipitation tower device (2), and at least three high-pressure flushing pipes (201) are installed in parallel above the upper end filler of the twill dust removal filler support plate (5) in the water film precipitation tower device (2).

5. A dust and fume wet dust removal equipment according to any one of claims 2 to 4, characterized in that: A fan spray pipe (301) is arranged in the induced draft fan (3), and the first spray pipe (101), the air intake pipe spray pipe (103), the high-pressure flushing pipe (201), the second spray pipe (202), the fan spray pipe (301) and the air collection pipe spray pipe (401) are all connected to the spray pump (6) through pipe fittings.

6. The dust and fume wet dust removal equipment according to claim 1 is characterized in that: A reducing hose (205) is fixed to the portion where the exhaust pipe (204) is connected to the induced draft fan (3) via a pipe fitting, and a pipe with a control valve is installed at the lowest point of the exhaust pipe (204) close to one end of the reducing hose (205).

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