CN201880472U - Flue gas desulfurizing and dedusting device for industrial coal-fired boiler - Google Patents

Abstract

An industrial coal-fired boiler flue gas desulfurization and dust removal device adopts spraying desulfurization, liquid adsorption, cyclone Venturi dust removal, water bath gas-liquid separation, water purification, and automatic slag removal. It is a round or square cylindrical closed body. It is divided into a desulfurization chamber and a dust removal chamber by the upper partition and the lower partition. The top is provided with a smoke outlet, and the bottom is connected to the sedimentation tank. The sedimentation tank is equipped with a slag scraper; In the pool, the amount of alkali is added automatically, and both clear water and lye are recycled to realize double circulation of gray water and lye, meeting the discharge standard.

Description

An industrial coal-fired boiler flue gas desulfurization and dust removal device

technical field

The utility model relates to a purification device for flue gas of an industrial coal-fired boiler, in particular to an industrial coal-fired boiler flue gas desulfurization and dust removal device which uses liquid as a separation adsorbent.

Background technique

Sulfur dioxide, nitrogen oxides and dust in the waste gas produced by coal-fired/heavy oil boilers have caused serious pollution to the environment. Nitrogen oxides are major pollutants that are difficult to control. Many small and medium-sized enterprises launched in the 1990s in our country, such as textile printing and dyeing enterprises, used a large number of oil-fired boilers in production. The soot, sulfur dioxide and nitrogen oxides produced by the oil-fired boiler during the production process have caused environmental pollution to the surrounding areas. According to environmental protection requirements, the polluted equipment, especially the flue gas produced by the oil-fired boiler, must be treated.

Contents of the invention

The purpose of the utility model is to provide an industrial coal-fired boiler flue gas desulfurization and dust removal device with better desulfurization and dust removal effects for the problem of flue gas emission from industrial coal-fired boilers. It is equipped with smoke inlet, body, dust removal chamber, upper partition, lye sprayer, working port, desulfurization chamber, water liquid sprayer, purification room, demister, smoke outlet, water inlet, lye inlet, cyclone venturi tube , liquid outlet, solenoid valve, liquid level switch, dosing hopper, lye pool, agitator, first solution pump, liquid level switch, second solution pump, filter tank, filter plate, sedimentation tank, slag scraper, Transfer carts, ash hoppers and lower shelves, etc. The present invention is a circular or square cylindrical airtight body, with a smoke outlet at the top and a sedimentation tank at the bottom; the body is divided into a desulfurization chamber and a dust removal chamber by an upper partition and a lower partition; the upper end of the cyclone venturi tube is connected to the upper partition, The lower end of the cyclone Venturi tube is connected to the lower partition, the lye sprayer is installed above the cyclone Venturi tube, and the mist eliminator is installed under the smoke outlet; the outlet at the lower end of the cyclone Venturi tube is aligned with the ash collecting bucket, and the outlet of the ash collecting bucket is aligned with the ash collecting bucket in the sedimentation tank. The slag scraper, the sedimentation tank and the filter tank are separated by a filter plate, and the solution in the filter tank is connected to the lye inlet of the desulfurization chamber through the second solution pump and the solenoid valve, and then enters the lye sprayer; the solution in the lye pool is passed through the electromagnetic The valve is connected to the lye inlet of the desulfurization chamber and enters the lye sprayer; the lye pool is equipped with agitator, liquid level switch, dosing hopper and battery valve; A battery valve is provided between the lye pool and the lye pool.

The flue gas enters the dust removal box from the smoke inlet, and under the action of wind pressure, the cyclone Venturi tube is driven to rotate. After the flue gas enters the cyclone Venturi tube, under the action of Venturi, dust falls, and the dust particles enter through the lower end of the cyclone Venturi tube. The ash collecting hopper falls to the slag scraper in the sedimentation tank; the flue gas is led from the upper end of the cyclone Venturi tube to the desulfurization chamber; the flue gas is mixed with the lye spray in the desulfurization chamber to produce desulfurization effect, and the flue gas passes through the demister from the desulfurization chamber It is further washed and purified and discharged from the smoke outlet. The lye that enters the desulfurization chamber through the lye inlet comes from the lye pool and the filter pool. The liquid outlet at the bottom of the dust removal chamber is connected to the lye pool, and the solution brought out by the rotation of the cyclone Venturi tube flows back to the lye pool; The solution flowing into the sedimentation tank is sucked by the second solution pump from the filter tank to the desulfurization chamber through the solenoid valve, the lye inlet, and the lye sprayer; the lye pool dosing bucket is controlled by the solenoid valve to add powder according to the PH value of the lye .

The utility model adopts chemical spray desulfurization, liquid adsorption, water bath gas-liquid separation, cyclone Venturi dust removal, clear water purification and automatic slag removal for the flue gas of the oil-fired boiler. Not only does its discharge meet environmental protection standards, but both clean water and lye are recycled to realize double circulation of gray water and lye. The entire dust removal system has low operating costs and eliminates secondary pollution.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the utility model embodiment and the connection relation of its supporting equipment.

Fig. 2 is a K--K view of Fig. 1 .

Fig. 3 is a schematic structural diagram of a cyclone venturi tube according to an embodiment of the present invention.

Detailed ways

Referring to Figures 1 to 3, the utility model is provided with a smoke inlet 1, a body 2, a dust removal chamber 3, an upper partition 4, an alkali sprayer 5, a working port 6, 15, a desulfurization chamber 7, a water sprayer 8, and a purification chamber 9. Demist gas 10, smoke outlet 11, water inlet 12, lye inlet 13, cyclone venturi tube 14, liquid outlet 16, solenoid valve 17, 18, 20, liquid level switch 19, 25, dosing bucket 21, Alkali pool 22, agitator 23, first solution pump 24, second solution pump 26, filter tank 27, filter plate 28, sedimentation tank 29, slag scraper 30, transfer vehicle 31, ash hopper 32 and lower partition wait.

The smoke enters the dust removal chamber 3 from the smoke inlet 1, and under the action of wind pressure, the blade 144 of the cyclone Venturi tube 14 is pushed to rotate, and the smoke enters from the smoke inlet 142 of the cyclone Venturi tube 14, and under the action of the Venturi, The dust particles enter the ash collecting hopper 32 through the ash outlet 141 of the cyclone venturi tube 14, fall into the slag scraper 30, and are transported by the transfer vehicle 31; while the flue gas is led to the desulfurization Chamber 7; the flue gas is mixed with the alkali mist sprayed from the lye sprayer 5 in the desulfurization chamber 7 to produce a desulfurization effect. The flue gas is further washed and purified from the desulfurization chamber 7 through the demister 10 and discharged from the smoke outlet 11. The lye that enters the desulfurization chamber 7 through the lye inlet 13 comes from the lye pool 22 and the filter pool 27; the liquid outlet 16 at the bottom of the dust removal chamber 7 is connected with the lye pool 22, and the solution taken out by the cyclone Venturi tube 14 rotates and flows back to The lye pool 22; the solution that flows into the sedimentation tank 29 through the ash collecting hopper 32 is passed through the solenoid valve 17, the lye inlet 13, the lye sprayer 5 to the desulfurization chamber 7 from the filter tank 27 by the second solution pump 26; Medicine hopper 21 is controlled by electromagnetic valve 20 according to the pH value of lye and adds medicine powder. The lye and clear water are recycled.

After testing, the embodiment of the utility model can achieve the following main parameters.

Flue gas technical parameters:

1. Flue gas composition: soot, SO ₂ ;

2. Flue gas temperature: 130～250℃;

3. Dust concentration: 1200～1500mg/Nm ³ .

Concentration of pollutants in flue gas after treatment (according to national standard GB13271-2001):

1. Smoke and dust emission concentration ≤ 200 ~ 150mg/m ³ ;

2. Ringelmann blackness: level 1;

3. Sulfur dioxide emission concentration ≤ 1200-900mg/m ³ .

Claims (2)

1. industry coal-boiler desulfurating dust removing device for flue gas is characterized in that being provided with into mouth, body, dirt pocket, upper spacer, alkali lye sprayer, working hole, desulfurization chamber, water liquid sprayer, clean room, demister, outlet flue, water inlet, alkali lye import, whirlwind Venturi, liquid outlet, magnetic valve, liquid-level switch, adds drug bucket, alkali lye pond, agitator, the 1st solution pump, liquid-level switch, the 2nd solution pump, filtering ponds, filter, sedimentation basin, Slag Scraping Device, transfer car(buggy), poly-ash bucket and following shelf; Be divided into desulfurization chamber, dirt pocket by upper spacer and lower clapboard in the body; Whirlwind Venturi upper end connects dividing plate, and termination lower clapboard under the whirlwind Venturi, alkali lye sprayer are loaded on whirlwind Venturi top, and demister is established in the outlet flue below; Poly-ash bucket is aimed in the outlet of whirlwind Venturi lower end, and poly-ash bucket aligned beneath is located at the Slag Scraping Device in the sedimentation basin; Sedimentation basin and filtering ponds are separated by filter, and solution is connected to the alkali lye import of desulfurization chamber through the 2nd solution pump, magnetic valve in the filtering ponds, advances the alkali lye sprayer; Solution is connected to the alkali lye import of desulfurization chamber by the 1st solution pump through magnetic valve in the alkali lye pond, advances the alkali lye sprayer; The alkali lye pond is established agitator, liquid-level switch, is added drug bucket and battery valve; Solution flows into the alkali lye pond from liquid outlet through pipeline in the dirt pocket, adds between drug bucket and the alkali lye pond and establishes battery valve.

2. a kind of industry coal-boiler desulfurating dust removing device for flue gas as claimed in claim 1 is characterized in that the whirlwind Venturi is provided with ash discharging hole, exhaust outlet, advances mouth and blade.

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