CN214552251U

CN214552251U - A boiler exhaust gas return device with good purification effect

Info

Publication number: CN214552251U
Application number: CN202120541575.XU
Authority: CN
Inventors: 王津钧; 杨云飞
Original assignee: Beijing Lianyou Chuangzhan Technology Co ltd
Current assignee: Beijing Lianyou Chuangzhan Technology Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-11-02
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses a boiler exhaust gas recirculation device with good purification effect in the technical field of boiler exhaust gas recirculation. A filter cotton board is fixed on the top of the inner cavity of the purification box, a gas collecting hood is fixed on the inner side wall of the purification box, the bottom end of the gas collecting hood is fixedly assembled with a spiral heat exchange pipe, and the other end of the smoke exhaust pipe is The flue gas absorption purifier fixed on the right side of the top of the base is fixedly assembled, the other end of the return pipe is fixedly assembled with the blower input end fixed on the top of the right side wall of the purification box, and the return pipe is fixedly equipped with a circulation control valve, A gas temperature detector is installed on the part of the pipe extending out of the purification box of the spiral heat exchange pipe, which can realize the recovery and utilization of the heat in the exhaust gas, and at the same time realize the absorption and purification of the gas, and improve the environmental protection of the gas.

Description

Boiler tail gas reflux unit that purifying effect is good

Technical Field

The utility model relates to a boiler tail gas backward flow technical field specifically is a boiler tail gas reflux unit that purifying effect is good.

Background

The boiler is widely applied in various fields, meanwhile, the boiler is also a high-energy-consumption device, when the boiler works, smoke can take away a large amount of heat, so that the heat utilization rate of the boiler is reduced, meanwhile, the flue gas is directly discharged into the atmosphere, which can seriously pollute the atmosphere and is not in line with the development concept of energy conservation and emission reduction, and the cooling is usually realized by adopting a gas washing mode when the boiler tail gas is discharged, but the tail gas is cooled in the gas washing process, a large amount of water is needed for cooling in the temperature reduction process, thus, the waste heat in the tail gas can not be utilized, and is wasted while consuming a large amount of water, the tail gas contains a large amount of dust substances, the water is difficult to treat, the water treatment difficulty is increased, the treatment of tail gas is insufficient, can cause the pollution of environment, for this reason, we provide a boiler tail gas reflux unit that purifying effect is good.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a boiler tail gas reflux unit that purifying effect is good to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a boiler tail gas reflux device with good purification effect comprises a base, wherein a boiler body is fixed on the left side of the top of the base, a draught fan is fixedly assembled at the top of the boiler body, a flue gas pipe is fixedly assembled at the output end of the draught fan, a spray tower fixed on the base is arranged on the right side of the boiler body, the other end of the flue gas pipe extends into the spray tower, a throttle valve is fixedly assembled on the flue gas pipe, a purification box is fixed on the right side of the spray tower, a gas guide pipe is fixedly assembled at the top between the spray tower and the purification box, a filter cotton plate is fixed at the top of an inner cavity of the purification box, a gas collecting cover is fixed on the inner side wall of the purification box, a spiral heat exchange pipe is fixedly assembled at the bottom end of the gas collecting cover, a backflow pipe and a smoke exhaust pipe are assembled at a branch behind the bottom end of the spiral heat exchange pipe extending out of the right side wall of the purification box, the other end of the smoke exhaust pipe and a smoke absorption purifier fixed on the right side of the top of the base, the other end of the return pipe and the input end of the air blower fixed to the top of the right side wall of the purification box are fixedly assembled, the output end of the air blower is communicated and assembled with the inner cavity of the purification box through a pipeline, a circulation control valve is fixedly assembled on the return pipe, a gas temperature detector is assembled on a part of pipeline, extending out of the purification box, of the spiral heat exchange pipe, an exhaust control valve is assembled on the exhaust pipe, and a control panel is fixedly assembled on the boiler body.

Preferably, the control panel is respectively and electrically connected with the induced draft fan, the air blower, the gas temperature detector, the exhaust control valve and the circulation control valve.

Preferably, the flue gas absorption clarifier includes and discharges fume tub fixed assembly's lower box, the top spiro union of box is equipped with the box down, be fixed with the spacing ring on the inside wall of box down, be equipped with the filter screen on the spacing ring, the inner chamber top of going up the box is fixed with the active carbon and adsorbs the net, it is fixed with the blast pipe to go up the box top.

Preferably, cooling water is injected into the purification box, a water inlet pipe and a water drain pipe are assembled on the purification box, and a drain pipe is fixedly assembled at the bottom of the spray tower.

Preferably, the air duct corresponds to the filter cotton plate, and the pipeline fixedly assembled at the output end of the air blower is arranged at the bottom of the filter cotton plate.

Preferably, the gas collecting channel is funnel-shaped, and the size of the gas collecting channel is matched with the size of the inner cavity of the purifying box.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of reasonable design, the waste gas that produces boiler body is led into spray column through the flue gas pipe through the draught fan, spray column can get rid of the dust in the boiler waste gas, pollutants such as granule, prevent air pollution, can realize the cooling to waste gas simultaneously through the heat exchange of waste gas and cooling water, realize the recycle to heat energy, the gas after filtering is led into the purifying box through the air duct, the gas can be led into spiral heat exchange pipe through the gas collecting channel after filtering cotton board, can impel the gas after filtering and the cooling water in the purifying box to realize the heat exchange, improve the utilization ratio to heat energy, discharge the purifying box after the heat exchange is accomplished, when gas temperature detector detects the gas temperature index in the spiral heat exchange pipe unqualified simultaneously, control panel opens circulation control valve and air-blower, then lead the gas into the purifying box again through the back flow and carry out the heat exchange, the treatment effect and the treatment quality of waste gas are improved, after the gas temperature detector detects the waste gas to be qualified, the control panel controls the exhaust control valve to be opened, the gas is guided into the flue gas absorption purifier through the exhaust pipe to realize absorption and purification, and the environmental protection performance of the gas is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall cross-sectional structure of the present invention;

fig. 3 is a schematic structural view of the flue gas absorption purifier of the present invention.

In the figure: 1. a base; 2. a boiler body; 3. an induced draft fan; 4. a flue gas pipe; 5. a spray tower; 6. a purification box; 7. an air duct; 8. an air throttle; 9. a gas-collecting hood; 10. a spiral heat exchange tube; 11. a return pipe; 12. a blower; 13. a smoke exhaust pipe; 14. a flue gas absorption purifier; 141. a lower box body; 142. an upper box body; 143. a limiting ring; 144. filtering with a screen; 145. an activated carbon adsorption net; 146. an exhaust pipe; 15. a gas temperature detector; 16. an exhaust control valve; 17. a circulation control valve; 18. a control panel; 19. a filter cotton plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a boiler tail gas reflux device with good purification effect comprises a base 1, a boiler body 2 is fixed on the left side of the top of the base 1, an induced draft fan 3 is fixedly assembled on the top of the boiler body 2, a flue gas pipe 4 is fixedly assembled at the output end of the induced draft fan 3, a spray tower 5 fixed on the base 1 is arranged on the right side of the boiler body 2, the other end of the flue gas pipe 4 extends into the spray tower 5, an air throttle 8 is fixedly assembled on the flue gas pipe 4, a purification box 6 is fixed on the right side of the spray tower 5, an air duct 7 is fixedly assembled at the top between the spray tower 5 and the purification box 6, a filter cotton plate 19 is fixed on the top of the inner cavity of the purification box 6, a gas collecting hood 9 is fixed on the inner side wall of the purification box 6, a spiral heat exchange pipe 10 is fixedly assembled at the bottom end of the gas collecting hood 9, a reflux pipe 11 and a smoke exhaust pipe 13 are assembled after the bottom end of the spiral heat exchange pipe 10 extends out of the right side wall of the purification box 6, the other end of the smoke exhaust pipe 13 and the flue gas absorption purifier 14 fixed on the right side of the top of the base 1 are fixedly assembled, the other end of the return pipe 11 and the input end of the air blower 12 fixed on the top of the right side wall of the purifying box 6 are fixedly assembled, the output end of the air blower 12 is communicated and assembled with the inner cavity of the purifying box 6 through a pipeline, the return pipe 11 is fixedly assembled with a circulating control valve 17, the spiral heat exchange pipe 10 extends out of the part of the pipeline of the purifying box 6 and is assembled with a gas temperature detection meter 15, the smoke exhaust pipe 13 is assembled with an exhaust control valve 16, and the boiler body 2 is fixedly assembled with a control panel 18.

The control panel 18 is respectively and electrically connected with the induced draft fan 3, the blower 12, the gas temperature detector 15, the exhaust control valve 16 and the circulation control valve 17;

referring to fig. 3, the flue gas absorption purifier 14 includes a lower box 141 fixedly assembled with the smoke exhaust pipe 13, an upper box 142 is screwed on the top of the lower box 141, a limiting ring 143 is fixed on the inner side wall of the lower box 141, a filter screen 144 is assembled on the limiting ring 143, an activated carbon adsorption screen 145 is fixed on the top of the inner cavity of the upper box 142, an exhaust pipe 146 is fixedly assembled on the top of the upper box 142, the filter screen 144 can filter gas, the activated carbon adsorption screen 145 can effectively adsorb impurities in the gas, the gas purification effect is improved, the filter screen 144 can be conveniently replaced by taking the upper box 142 down from the lower box 141 due to the screwed assembly of the upper box 142 and the lower box 141, and the operation is convenient;

cooling water is injected into the purification box 6, a water inlet pipe and a water outlet pipe are assembled on the purification box 6, and a drain pipe is fixedly assembled at the bottom of the spray tower 5, so that heat exchange between the cooling water and gas heat is realized conveniently, and the heat utilization rate is improved;

the air duct 7 corresponds to the filtering cotton plate 19, and a pipeline fixedly assembled at the output end of the blower 12 is arranged at the bottom of the filtering cotton plate 19;

the gas-collecting channel 9 is funnel-shaped, and the size of the gas-collecting channel 9 is matched with the size of the inner cavity of the purifying box 6.

The working principle is as follows: the air throttle 8 is opened, the waste gas generated by the boiler body 2 is guided into the spray tower 5 through the flue gas pipe 4 by the draught fan 3, the spray tower 5 can remove pollutants such as dust and particles in the boiler waste gas, air pollution is prevented, meanwhile, the waste gas can be cooled through the heat exchange between the waste gas and cooling water, the recycling of heat energy is realized, the filtered gas is guided into the purifying box 6 through the air duct 7, the gas is guided into the spiral heat exchange pipe 10 through the gas collecting hood 9 after being filtered by the filtering cotton plate 19, the heat exchange between the filtered gas and the cooling water in the purifying box 6 can be promoted, the utilization rate of heat energy is improved, the gas is discharged out of the purifying box 6 after the heat exchange is finished, and meanwhile, when the gas temperature detector 15 detects that the gas temperature index in the spiral heat exchange pipe 10 is unqualified, the control panel 18 opens the circulation control valve 17 and the air blower 12, the gas is reintroduced into the purification box 6 through the return pipe 11 for heat exchange, the treatment effect and treatment quality of the waste gas are improved, after the gas temperature detector 15 detects the waste gas to be qualified, the control panel 18 controls the exhaust control valve 16 to open and introduce the gas into the flue gas absorption purifier 14 through the exhaust pipe 13 to realize absorption and purification, and the environmental protection performance of the gas is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A boiler exhaust gas return device with good purification effect, comprising a base (1), a boiler body (2) is fixed on the top left side of the base (1), and an induced draft fan is fixedly assembled on the top of the boiler body (2) (3), the output end of the induced draft fan (3) is fixedly equipped with a flue gas pipe (4), characterized in that: the right side of the boiler body (2) is provided with a spray fixed on the base (1) tower (5), the other end of the flue gas pipe (4) extends into the spray tower (5), and the flue gas pipe (4) is fixedly equipped with a throttle valve (8), the spray tower A purification box (6) is fixed on the right side of (5), an air duct (7) is fixedly assembled on the top between the spray tower (5) and the purification box (6), and the top of the inner cavity of the purification box (6) A filter cotton plate (19) is fixed, a gas collecting cover (9) is fixed on the inner side wall of the purification box (6), and a spiral heat exchange tube (10) is fixedly assembled at the bottom end of the gas collecting cover (9). , the bottom end of the spiral heat exchange pipe (10) extends out of the right side wall of the purification box (6), and the back branch is equipped with a return pipe (11) and a smoke exhaust pipe (13). One end is fixedly assembled with the flue gas absorption purifier (14) fixed on the right side of the top of the base (1), and the other end of the return pipe (11) is fixed with the blower (12) fixed on the top of the right side wall of the purification box (6). The input end is fixedly assembled, and the output end of the blower (12) is connected and assembled with the inner cavity of the purification box (6) through a pipeline, and a circulation control valve (17) is fixedly assembled on the return pipe (11), and the spiral A gas temperature detector (15) is installed and assembled on a part of the pipe of the heat exchange pipe (10) extending out of the purification box (6), and an exhaust control valve (16) is installed and assembled on the smoke exhaust pipe (13). A control panel (18) is fixedly assembled on the boiler body (2).

2. A boiler exhaust gas recirculation device with good purification effect according to claim 1, characterized in that: the control panel (18) is electrically connected to the induced draft fan (3), the blower (12), and the gas temperature detector respectively. (15), exhaust control valve (16) and circulation control valve (17).

3. The boiler exhaust gas return device with good purification effect according to claim 1, characterized in that: the flue gas absorption purifier (14) comprises a lower box (141) fixedly assembled with the flue gas exhaust pipe (13). ), the top of the lower case (141) is screwed and assembled with an upper case (142), a limit ring (143) is fixed on the inner side wall of the lower case (141), and the limit ring (143) ) is equipped with a filter screen (144), an activated carbon adsorption screen (145) is fixed on the top of the inner cavity of the upper box (142), and an exhaust pipe (146) is fixed on the top of the upper box (142).

4. A boiler exhaust gas return device with good purification effect according to claim 1, characterized in that: cooling water is injected into the purification box (6), and the purification box (6) is equipped with an inlet A water pipe and a drain pipe, the bottom of the spray tower (5) is fixedly equipped with a sewage pipe.

5. A boiler exhaust gas return device with good purification effect according to claim 1, characterized in that: the air guide pipe (7) corresponds to the filter cotton plate (19), and the output end of the blower (12) The fixedly assembled pipeline is arranged at the bottom of the filter cotton plate (19).

6. A boiler exhaust gas return device with good purification effect according to claim 1, characterized in that: the gas collecting hood (9) is funnel-shaped, and the size of the gas collecting hood (9) and the purification box (6) The size of the inner cavity is adapted.