CN201105203Y - Ring grid showering spume dust removing and desulferizing device - Google Patents

Abstract

Ring grid spray foam dust removal and desulfurization device, including inner cylinder body, outer cylinder body, adjustable overflow sealing groove, and flue gas inlet connected with outer cylinder body, annular water pipe, nozzle, and Flue gas outlet, demister, cyclone, inner cylinder grille, dust removal water pipe tee; the utility model organically combines spray desulfurization and dedusting, bubbling desulfurization and dedusting, foam removal device, and demisting device, greatly reducing Reduced equipment volume and floor area, saving investment costs; the utility model is mainly used for the treatment of flue gas containing SO _X and particulate matter, especially for the treatment of flue gas of medium and small coal-fired boilers. It has the characteristics of simple structure, small footprint, low investment, good treatment effect, easy operation, reliable operation, etc., and is suitable for industrial production.

Description

Ring grid spray foam dust removal and desulfurization device

Technical field:

The utility model relates to wet dust removal and desulfurization equipment in air pollution control equipment, in particular to a ring grid spray foam dust removal and desulfurization device.

Background technique:

my country's energy is dominated by coal, and coal accounts for about 75% of primary energy. With the rapid development of the economy, the national coal consumption is still increasing, and the burning process of coal produces a lot of pollution. Among these pollutions, SO _x and solid particles are the most serious. China promulgated the new "Air Pollution Prevention and Control Law" in 1995, and demarcated SO ₂ pollution control areas and acid rain control areas. The control of SO ₂ emissions is becoming more and more stringent in various places. At the same time, in recent years, solid particles have also become the main pollutants in urban air in my country. The annual average concentration of solid particles in 60% of cities exceeds the national level II standard. Because solid particles are harmful to urban air quality and people's health, they are very concerned by the society. . With the gradual enhancement of people's environmental awareness, the problems of reducing pollution sources, purifying the atmosphere, and protecting the living environment of human beings are being concerned and valued by hundreds of millions of people. Seeking measures to solve this pollution source has become one of the important topics of contemporary scientific and technological research. At present, there are hundreds of techniques for treating this kind of flue gas in the world, but only a dozen of them have practical value. It is roughly divided into three types: wet method, dry method and semi-dry method, among which the wet method is the most mature and widely used, accounting for about 85.0% of the total. However, due to the large investment and large area occupied by the wet treatment process, the application of this process in the flue gas treatment of medium and small boilers is limited. At present, the wet-process high-efficiency desulfurization and dust removal equipment that can be applied to the flue gas treatment of medium and small boilers is still blank. Therefore, the development of a wet desulfurization and dust removal equipment with small footprint, low investment and good treatment effect has become an urgent problem to be solved.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a ring-grid spray foam dust removal and desulfurization device with simple structure, small footprint, low investment, good treatment effect, easy operation and reliable operation.

In order to solve the above technical problems, the technical solution proposed by the utility model is: a ring-grid spray foam dust removal and desulfurization device, including an inner cylinder body, an outer cylinder body, an adjustable overflow sealing groove, and a The flue gas inlet, the annular water pipe, the nozzle, the flue gas outlet connected to the inner cylinder, the mist eliminator, the cyclone, the inner cylinder grille, and the tee of the dust removal water pipe; the outer cylinder is a column with a cone bottom Shaped structure, set outside the inner cylinder, the upper part of the outer cylinder is spirally connected with the flue gas inlet, the top is equipped with a circular water pipe and the nozzles are evenly arranged coaxially, the bottom of the lower cone is connected with the dust removal water pipe tee; the upper part of the inner cylinder is The smoke outlet is equipped with a demister and a cyclone in the middle, and the opening at the lower end is connected with the inner cylinder grille.

The cyclone is located in the center of the demister, and the two are integrally arranged in the middle of the inner cylinder to remove the entrained water vapor in the flue gas.

The grille of the inner cylinder is connected with the lower part of the inner cylinder, and the flue gas enters the inner cylinder through the grille at the bottom of the outer cylinder, and the foam generated by the solution is bubbled. The flue gas must pass through the foam layer, and the desulfurization and dust removal effect is strengthened. Under the action of the cylinder grid, it can be evenly distributed in the inner cylinder.

The tee of the dust removal water pipe is located at the lower part of the outer cylinder and is connected with the outer cylinder and the dust removal water pipe. When maintenance is required, the other outlet of the tee can be opened to empty the liquid in the tower.

The adjustable liquid seal tank is connected to the dust removal water pipe, and the liquid level in the liquid seal tank can be adjusted to control the liquid in the tower to maintain a certain liquid level.

The flue gas inlet of the equipment is spirally connected with the outer cylinder, and the flue gas enters the annular area between the outer cylinder and the inner cylinder, and then moves downwards along the cylinder wall, and the particulate matter in the flue gas is sprayed out by its own gravity and the nozzle. Under the trapping action of the mist liquid, it falls into the liquid at the bottom; the SO _x in the flue gas contacts with the liquid and then is absorbed and removed.

One end of the dust removal water pipe is connected with the tee outlet of the dust removal water pipe, and the other end is connected with the adjustable liquid seal tank. The inlet of the tee is connected to the lower part of the outer cylinder, and the other outlet is connected to the emptying valve. When the equipment needs to be overhauled, the emptying valve can be opened to drain the liquid in the equipment.

Compared with the prior art, the utility model has the advantages of organically combining spray desulfurization and dedusting, bubbling desulfurization and dedusting, foam removal device and demisting device, and adopting spiral air intake and spiral air outlet to lengthen the The contact time between the flue gas and the reaction solution strengthens the gas-liquid mass transfer and reaction, effectively improving the utilization rate of the absorbent; the demisting device with the cyclone can effectively reduce the humidity of the outlet gas and improve the effect of desulfurization and dust removal; adjustable liquid seal The tank can flexibly control the height of the liquid level in the tower to ensure that the flue gas passes through the equipment smoothly. The utility model is mainly used for the treatment of flue gas containing SO _x and particulate matter, especially for the treatment of flue gas of medium and small coal-fired boilers. The equipment volume and occupied area are greatly reduced, and the investment cost is saved. It has the characteristics of simple structure, small footprint, low investment, good treatment effect, easy operation, reliable operation, etc., and is suitable for industrial production.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of the combined structure of the mist eliminator and the cyclone in the utility model.

FIG. 4 is a top view of FIG. 3 .

FIG. 5 is an enlarged view of part B of FIG. 1 .

In Figures 1, 2, 3, 4, and 5:

1. Smoke inlet, 2. Ring water pipe, 3. Smoke outlet, 4. Inner cylinder, 5. Outer cylinder, 6. Nozzle, 7. Demister, 8. Cyclone, 9. Inner cylinder Grille, 10, adjustable liquid seal tank, 11, dust removal water pipe, 12, dust removal water pipe tee, 13, emptying valve.

Detailed ways

Referring to accompanying drawings 1, 2, 3, 4, 5, the ring grid spray foam dedusting and desulfurization device of the present invention includes an inner cylinder body 4, an outer cylinder body 5, an adjustable liquid seal tank 10, and a The flue gas inlet 1 connected to the cylinder body 5, the annular water pipe 2, the nozzle 6, the flue gas outlet 3 connected to the inner cylinder body 4, the demister 7, the cyclone 8, and the inner cylinder grille 9; the outer cylinder body 5 is A cylindrical structure with a conical bucket bottom, set outside the inner cylinder 4, the upper part of the cylinder is spirally connected with the flue gas inlet 1, the top is provided with a circular water pipe 2 and the nozzles 6 are evenly arranged on the same axis, and the bottom of the cone in the lower part is connected with the dust removal The water pipe tee 12 is connected; the upper part of the inner cylinder body 4 is the flue gas outlet 3, the middle part is provided with a mist eliminator 7 and a cyclone 8, and the lower end opening is connected with the inner cylinder grille 9.

The annular water pipe 2 is connected with the nozzle 6, and the reaction solution is sprayed into the outer cylinder 5 in the form of mist from the nozzle 6 after the pressure is equalized by the annular water pipe 2.

The cyclone 8 is located in the center of the mist eliminator 7, and both are located in the middle of the inner cylinder 4 to remove the entrained moisture in the flue gas.

The inner cylinder grille 9 is located at the lower part of the inner cylinder body 4, the flue gas enters the inner cylinder 4 through the grille 9 at the bottom of the outer cylinder body 5, the foam generated by the solution is bubbled, the flue gas must pass through the foam layer, the desulfurization and dust removal effect is strengthened, and at the same time The flue gas can be evenly distributed in the inner cylinder body 4 under the action of the inner cylinder grille 9 .

The dust removal water pipe tee 12 is located at the bottom of the outer cylinder body 5 and is connected with the outer cylinder body 5 and the dust removal water pipe 11. When maintenance is required, another outlet of the tee connection can be opened to empty the liquid in the tower.

The adjustable liquid seal tank 10 is connected with the dust removal water pipe 11, and the liquid level in the liquid seal tank is adjustable, thereby controlling the liquid in the tower to maintain a certain liquid level.

The working process of the utility model is as follows: the waste gas containing _SOx and smoke enters the outer cylinder 5 through the flue gas inlet 1, and fully contacts and reacts with the sprayed reaction solution sprayed from the nozzle 6, so as to remove _SOx and smoke in the flue gas. Smoke and dust, the preliminarily purified flue gas enters the inner cylinder body 4 through the inner cylinder grille 9, and when passing through the liquid at the bottom of the tower body, it contacts and reacts with the reaction solution again to obtain further purification. The flue gas that has been purified twice is evenly distributed by the inner cylinder grille 9 and the entrained foam is removed, and moves upward in the inner cylinder 4, and then passes through the demister 7 and the cyclone 8 to remove moisture, and then passes through the flue gas outlet 3 discharge. The reaction solution used in the equipment is equalized by the annular water pipe 2 and sprayed out in the form of mist through the nozzle 6, and falls into the bottom of the outer cylinder 5 after contacting and reacting with the flue gas in the outer cylinder 5. Under the action, it maintains a certain liquid level and reacts with the flue gas passing through the liquid again. The flue gas enters the inner cylinder 4 through the grille 9 at the bottom of the outer cylinder body 5, and the solution is bubbled to produce dust foam. It can be evenly distributed in the inner cylinder 4. The water vapor produced falls after being collected by the mist eliminator 7 and the cyclone 8. The reacted liquid is discharged through the dust removal water pipe 11 and the adjustable liquid seal tank 10 . The discharged liquid can be recycled after precipitation regeneration.

Claims (6)

1. A ring-grid spray foam dust removal and desulfurization device, including an inner cylinder body, an outer cylinder body, an adjustable overflow seal groove, and a flue gas inlet connected to the outer cylinder body, an annular water pipe, a nozzle, and an inner cylinder body The flue gas outlet, mist eliminator, cyclone, inner cylinder grille, and dust removal water pipe tee connected by the cylinder are characterized in that the outer cylinder is a cylindrical structure with a cone bottom, which is set outside the inner cylinder. The upper part of the outer cylinder is spirally connected with the flue gas inlet, the top is provided with a circular water pipe and nozzles are arranged, and the bottom of the lower cone is connected with a three-way connection of the dust removal water pipe; the upper part of the inner cylinder is the flue gas outlet, and the middle part is equipped with a demister and a cyclone. The opening at the lower end is connected with the grid of the inner cylinder. 2. A ring-spray foam dust removal and desulfurization device according to claim 1, characterized in that: the top of the outer cylinder is provided with a circular water pipe and uniformly arranged nozzles coaxially. 3. A ring-grid spray foam dust removal and desulfurization device according to claim 1, characterized in that: the cyclone is located at the center of the demister, and the two are integrally arranged in the middle of the inner cylinder. 4. A ring-grid spray foam dedusting and desulfurization device according to claim 1, characterized in that the grid of the inner cylinder is connected to the lower part of the inner cylinder. 5. A ring-grid spray foam dust removal and desulfurization device according to claim 1, characterized in that: the tee of the dust removal water pipe is located at the lower part of the outer cylinder, and is connected with the outer cylinder and the dust removal water pipe. 6. A ring-grid spray foam dust removal and desulfurization device according to claim 1, characterized in that: the adjustable liquid seal tank with adjustable liquid level is connected to the dust removal water pipe.

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