CN212594866U

CN212594866U - VOC exhaust treatment system

Info

Publication number: CN212594866U
Application number: CN202021239896.6U
Authority: CN
Inventors: 步雷; 唐梨花; 侯金明; 孔令华; 陈长鹏
Original assignee: Shandong Lukang Hecheng Pharmaceutical Co Ltd
Current assignee: Shandong Lukang Hecheng Pharmaceutical Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-26
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to a VOC exhaust-gas treatment system belongs to exhaust-gas treatment technical field, including the filter equipment who connects gradually, the spray box, denitration tower and desulfurizing tower, the upper and lower direction is equipped with a plurality of guide plates about in the spray box, the equal level in below of each guide plate sets up a spray pipe, the spray pipe upper end is equipped with a row of sprinkler bead, be equipped with the defroster between spray box and the denitration tower, the inside annular spray pipe that is equipped with of denitration tower, the spray pipe passes through the pipeline and links to each other with the aqueous ammonia water pump that sets up outside the denitration tower, the lower part is equipped with an outlet duct in the denitration tower, a row of gas outlet has been seted up on the outlet duct, the outlet end of outlet duct and defroster is linked together, the top intercommunication. The utility model discloses have the processing function of filtration, water spraying, SOx/NOx control, can carry out effective treatment to various harmful substance among the VOC organic compound.

Description

VOC exhaust treatment system

Technical Field

The utility model relates to a VOC exhaust-gas treatment system belongs to exhaust-gas treatment technical field.

Background

VOC refers to volatile organic compounds in the air, and air containing VOC organic compounds at a certain concentration is very harmful to people. The VOC waste gas in China has the characteristics of large discharge amount, complex source and the like, and a large amount of VOC waste gas is generated in the industries of coating, printing, chemical engineering and the like. The harmful substances in the VOC organic compounds are mainly some large particulate matters and sulfides, nitrides, and the like. Most of the existing VOC waste gas treatment equipment adopts a certain treatment mode, and the treatment mode usually has good treatment effect only on one specific harmful substance in VOC organic compounds and has general treatment effect on other harmful substances.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve and exist not enoughly among the prior art, provide a VOC exhaust treatment system that can both carry out effective processing to various harmful substance in the VOC organic compound.

The utility model discloses a realize through following technical scheme:

namely a VOC waste gas treatment system, which comprises a filtering device, a spray box, a denitration tower and a desulfurization tower which are connected in sequence, wherein a plurality of guide plates are arranged in the spray box in the vertical direction, the guide plates are arranged in an inclined manner, the inclined directions of the guide plates are alternately arranged, a spray pipe is horizontally arranged below each guide plate, a row of spray heads are arranged at the upper end of each spray pipe, the outlet at the lowest end of the spray box is connected with a circulating pool arranged below the spray box, the circulating pool is connected with a circulating pump, the circulating pump is communicated with all the guide plates through a pipeline, the circulating pump is also connected with an ash dissolving device, a demister is arranged between the spray box and the denitration tower, the inlet end of the demister is connected with an induced draft fan, the inlet end of the induced draft fan is connected with the spray box, an annular spray pipe is arranged in the denitration tower, the lower end of the, the lower part is equipped with an outlet duct in the denitration tower, has seted up one row of gas outlet on the outlet duct, and the outlet end of outlet duct and defroster is linked together, and denitration tower top is through the top intercommunication of pipeline with the desulfurizing tower, is equipped with draught fan two on the pipeline that denitration tower and desulfurizing tower link to each other, and inside being equipped with multilayer SCR catalyst bed of desulfurizing tower, the desulfurizing tower lower extreme is equipped with the exhanst gas outlet.

The utility model discloses have the processing function of filtration, water spraying, SOx/NOx control, can carry out effective treatment to various harmful substance among the VOC organic compound, and water spraying function wherein, the time of waste gas and water contact is longer, can let in the waste gas can be dissolved in the material of water-soluble more thoroughly.

Further preferably, the filtering device is a filtering box, and a detachable filtering net is arranged in the filtering box.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an exhaust gas inlet; 2. a filter box; 3. a filter screen; 4. a spray box; 5. a baffle; 6. a water spray pipe; 7. a sprinkler head; 8. a circulation pump; 9. a circulation tank; 10. an ash melting device; 11. a first induced draft fan; 12. a demister; 13. a denitration tower; 14. an ammonia water pump; 15. an annular shower pipe; 16. a shower head; 17. an air outlet pipe; 18. an air outlet; 19. a second induced draft fan; 20. a desulfurizing tower; 21. an SCR catalyst bed; 22. and a flue gas outlet.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in figure 1, a VOC waste gas treatment system, including the sequentially connected filter equipment, spray box 4, denitrating tower 13 and desulfurizing tower 20, the spray box 4 is equipped with a plurality of guide plates 5 up and down, the guide plates 5 are obliquely arranged, the oblique direction of the guide plates 5 is alternatively arranged, each guide plate 5 is below horizontally provided with a spray pipe 6, the upper end of the spray pipe 6 is provided with a row of spray heads 7, the lowest outlet of the spray box 4 is connected with a circulation tank 9 arranged below the spray box 4, the circulation tank 9 is connected with a circulation pump 8, the circulation pump 8 is connected with all the guide plates 5 through pipelines, the circulation pump 8 is also connected with an ash melting device 10, a demister 12 is arranged between the spray box 4 and the denitrating tower 13, the inlet end of the demister 12 is connected with a draught fan 11, the inlet end of the draught fan 11 is connected with the spray box 4, the denitrating tower 13 is internally, annular shower 15's lower extreme is equipped with round shower head 16, shower 15 passes through the pipeline and links to each other with setting up ammonia water pump 14 outside denitration tower 13, the lower part is equipped with an outlet duct 17 in the denitration tower 13, a row of gas outlet 18 has been seted up on the outlet duct 17, the outlet end of outlet duct 17 and defroster 12 is linked together, the top intercommunication of 13 tops of denitration tower through pipeline and desulfurizing tower 20, be equipped with draught fan two 19 on the pipeline that denitration tower 13 and desulfurizing tower 20 link to each other, desulfurizing tower 20 inside is equipped with multilayer SCR catalyst bed 21, alkali lye has been sprayed in advance on the

SCR catalyst bed

21, 20 lower extremes of desulfurizing tower are equipped with exhanst gas outlet 22.

The filter device is a filter box 2, and a detachable filter screen 3 is arranged in the filter box 2.

The working process is as follows:

VOC waste gas enters from the waste gas inlet 1, wherein large-particle substances are filtered by the filter screen 3, the filter screen 3 can be detached, when more particles are filtered on the filter screen 3, can be extracted for cleaning, the filtered waste gas enters the spraying box 4, the waste gas advances along the arrangement of the guide plate 5, meanwhile, water is sprayed out from the water spray head 7, wastewater enters the circulating tank 9, the water can be sprayed for use after being treated by the ash melting device 10, the sprayed waste gas enters the demister 12, the demister 12 treats the residual water in the waste gas, then the waste gas enters a denitration tower 13, the waste gas is discharged from a gas outlet 18, ammonia water is sprayed out from a spray header 16 for denitration treatment, the waste gas after denitration treatment enters a desulfurization tower 20, the desulfurization reaction is carried out under the action of the SCR catalyst bed 21, and the finally treated exhaust gas is discharged from a flue gas outlet 22.

In the description of the present invention, the terms "inside", "outside", "up", "down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description of the present invention and does not require the present invention to be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. A VOC exhaust treatment system which characterized in that: comprises a filtering device, a spraying box (4), a denitration tower (13) and a desulfurization tower (20) which are connected in sequence, wherein a plurality of guide plates (5) are arranged in the spraying box (4) in the vertical direction, the guide plates (5) are arranged in an inclined manner, the inclined directions of the guide plates (5) are alternately arranged, a spray pipe (6) is horizontally arranged below each guide plate (5), a row of spray heads (7) are arranged at the upper end of each spray pipe (6), the outlet at the lowest end of the spraying box (4) is connected with a circulating pool (9) arranged below the spraying box (4), the circulating pool (9) is connected with a circulating pump (8), the circulating pump (8) is communicated with all the guide plates (5) through pipelines, the circulating pump (8) is also connected with an ash melting device (10), a demister (12) is arranged between the spraying box (4) and the denitration tower (13), the inlet end of the demister (12, the entry end of draught fan (11) links to each other with spray box (4), denitration tower (13) inside is equipped with an annular shower (15), the lower extreme of annular shower (15) is equipped with round shower head (16), shower (15) link to each other with setting up ammonia water pump (14) outside denitration tower (13) through the pipeline, lower part is equipped with one outlet duct (17) in denitration tower (13), one row of gas outlet (18) have been seted up on outlet duct (17), outlet duct (17) are linked together with the exit end of defroster (12), the top intercommunication of pipeline and desulfurizing tower (20) is passed through on denitration tower (13) top, be equipped with draught fan two (19) on the pipeline that denitration tower (13) and desulfurizing tower (20) link to each other, inside multilayer SCR catalyst bed (21) that is equipped with of desulfurizing tower (20), desulfurizing tower (20) lower extreme is equipped with exhanst gas outlet (22).

2. A VOC exhaust treatment system according to claim 1 wherein: the filter device is a filter box (2), and a detachable filter screen (3) is installed in the filter box (2).