CN211586017U

CN211586017U - Metal sludge resourceful treatment and flue gas purification system

Info

Publication number: CN211586017U
Application number: CN202020019715.2U
Authority: CN
Inventors: 唐祥荣; 沈强; 沈卫星; 袁潇箫; 其他发明人请求不公开姓名
Original assignee: Kelin Environmental Protection Technology Co ltd
Current assignee: Kelin Environmental Protection Technology Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-09-29
Anticipated expiration: 2030-01-06

Abstract

The utility model discloses a metal sludge resourceful treatment and gas cleaning system, including the rotary kiln, the flue gas output end of rotary kiln passes through the first cooler of connecting pipe fixedly connected with, and the output of first cooler passes through connecting pipe fixedly connected with preliminary precipitator, and the input fixedly connected with third recycling pipe of preliminary precipitator, the one end fixedly connected with exhaust-heat boiler of preliminary precipitator is kept away from to the third recycling pipe, and the output of preliminary precipitator passes through connecting pipe fixedly connected with dry-type reaction tower, the utility model discloses the beneficial effect who reaches is: the utility model discloses compact structure, the practicality is strong, through setting up rotary kiln drying, alloy stove technology, handles stainless steel mud and electroplating sludge etc. and output ferronickel alloy, nickel-copper alloy and water quenching sediment etc. simultaneously realize the resourceful treatment or the innocent treatment of danger waste material, smelt the principle that the technology follows "minimizing", "resourceful", "innocent" in addition, satisfy the national standard to fume emission.

Description

Metal sludge resourceful treatment and flue gas purification system

Technical Field

The utility model relates to a flue gas purification system, in particular to metal sludge resourceful treatment and flue gas purification system belongs to clean system technical field.

Background

In the existing life, hazardous waste refers to hazardous waste listed in the national hazardous waste list or accurately defined as hazardous waste according to the national hazardous waste identification standard, at present, incineration has become the most main approach for hazardous waste treatment, because hazardous waste is of various types and complex in nature, the pollutant components in the hazardous waste incineration flue gas are complex and have high volatility, the environmental protection pressure will be continuously enhanced along with the continuous improvement of the environmental requirements of people, the stricter pollutant emission standard based on the regional atmospheric environment quality standard will become the key point, but when the existing metal sludge recycling treatment and flue gas purification system is used for treating hazardous waste, the recycling treatment or harmless treatment of hazardous waste cannot be realized, and the principles of reduction, recycling and harmless cannot be followed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide metal sludge resourceful treatment and gas cleaning system.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model discloses a metal sludge resourceful treatment and flue gas purification system, including the rotary kiln, the flue gas output end of rotary kiln is through connecting pipe fixedly connected with first cooler, the output of first cooler is through connecting pipe fixedly connected with preliminary precipitator, the input fixedly connected with third recycling pipe of preliminary precipitator, the one end fixedly connected with exhaust-heat boiler that the third recycling pipe kept away from the preliminary precipitator, the output of preliminary precipitator is through connecting pipe fixedly connected with dry-type reaction tower, the output of dry-type reaction tower is through connecting pipe fixedly connected with bag dust remover, the output of bag dust remover is through connecting pipe fixedly connected with exhaust fan, the output of exhaust fan is through connecting pipe fixedly connected with deacidification tower, the output of deacidification tower is through connecting pipe fixedly connected with electric demister, the output of electric demister is through connecting pipe fixedly connected with heat exchanger, the output end of the heat exchanger is fixedly connected with an SCR denitration reactor through a connecting pipe.

As an optimized proposal of the utility model, the bottom of the pre-dust collector, the dry reaction tower, the bag type dust collector, the deacidification tower and the electric demister is provided with an ash discharge port.

As an optimized scheme of the utility model, connecting pipe fixedly connected with dry powder injection apparatus is passed through to the one end at dry-type reaction tower's top, the top of dry-type reaction tower just is located one side of dry powder injection apparatus and passes through connecting pipe fixedly connected with active carbon injection apparatus.

As an optimized scheme of the utility model, the inside fixedly connected with flue gas heater of connecting pipe between the output of heat exchanger and the input of SCR denitration reactor.

As an optimized scheme of the utility model, the output of SCR denitration reactor passes through connecting pipe fixedly connected with chimney.

As a preferred scheme of the utility model, the first retrieval and utilization pipe of bottom ash discharge mouth fixedly connected with of dust remover in advance, the one end of dust remover in advance and the dry position fixed connection of two-stage process of rotary kiln are kept away from to first retrieval and utilization pipe.

As an optimized scheme of the utility model, exhaust-heat boiler's input passes through connecting pipe fixedly connected with alloy stove, exhaust-heat boiler's bottom ash discharge mouth fixedly connected with second retrieval and utilization pipe, exhaust-heat boiler's one end and the two-stage segment drying part fixed connection of rotary kiln are kept away from to the second retrieval and utilization pipe.

The utility model discloses the beneficial effect who reaches is: the utility model discloses compact structure, the practicality is strong, through setting up rotary kiln drying, alloy stove technology, handles stainless steel mud and electroplating sludge etc. and output ferronickel alloy, nickel-copper alloy and water quenching sediment etc. simultaneously realize the resourceful treatment or the innocent treatment of danger waste material, smelt the principle that the technology follows "minimizing", "resourceful", "innocent" in addition, satisfy the national standard to fume emission.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

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

In the figure: 1. a rotary kiln; 2. a first cooler; 3. a pre-deduster; 4. a waste heat boiler; 5. an alloy furnace; 6. a dry reaction tower; 7. a dry powder spraying device; 8. a bag type dust collector; 9. an exhaust fan; 10. a deacidification tower; 11. an electric demister; 12. a heat exchanger; 13. a flue gas heater; 14. an SCR denitration reactor; 15. a chimney; 16. a first return pipe; 17. a second recycling pipe; 18. an activated carbon injection device; 19. and a third recycling pipe.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Examples

As shown in fig. 1, the utility model provides a metal sludge resource treatment and flue gas purification system, which comprises a rotary kiln 1, wherein the flue gas output end of the rotary kiln 1 is fixedly connected with a first cooler 2 through a connecting pipe, so that the dust-containing high-temperature flue gas produced by the rotary kiln 1 is conveniently cooled to about two hundred degrees centigrade at about three hundred fifty degrees centigrade through the first cooler 2; the output end of the first cooler 2 is fixedly connected with a pre-dust remover 3 through a connecting pipe, the input end of the pre-dust remover 3 is fixedly connected with a third recycling pipe 19, one end, far away from the pre-dust remover 3, of the third recycling pipe 19 is fixedly connected with a waste heat boiler 4, and the third recycling pipe 19 is fixedly connected with a smoke exhaust port of the waste heat boiler 4, so that smoke exhausted by the waste heat boiler 4 can be better purified; the output end of the pre-dust collector 3 is fixedly connected with a dry reaction tower 6 through a connecting pipe, so that dioxin can be better removed through baking soda or slaked lime dry deacidification and activated carbon adsorption; the output end of the dry reaction tower 6 is fixedly connected with a bag type dust collector 8 through a connecting pipe, so that high-efficiency dust collection can be better performed, the emission of smoke particles can be controlled, and then the collected dust is subjected to harmless treatment; the output end of the bag type dust collector 8 is fixedly connected with an exhaust fan 9 through a connecting pipe, the output end of the exhaust fan 9 is fixedly connected with a deacidification tower 10 through a connecting pipe, the output end of the deacidification tower 10 is fixedly connected with an electric demister 11 through a connecting pipe, and the discharge of aerosol and dust-containing liquid drops is conveniently controlled through the electric demister 11; the output of electric demister 11 passes through connecting pipe fixedly connected with heat exchanger 12, and the output of heat exchanger 12 passes through connecting pipe fixedly connected with SCR denitration reactor 14, the better desorption to the nitrogen oxide of being convenient for.

Wherein, the bottom of the pre-dust collector 3, the dry reaction tower 6, the bag type dust collector 8, the deacidification tower 10 and the electric demister 11 are all provided with ash discharge ports, which is convenient for better discharging the fly ash.

Wherein, the one end at the top of dry-type reaction tower 6 is through connecting pipe fixedly connected with dry powder injection apparatus 7, and the top of dry-type reaction tower 6 just is located one side of dry powder injection apparatus 7 and passes through connecting pipe fixedly connected with active carbon injection apparatus 18, and the better deacidification through the two-stage wet process of being convenient for controls the emission of acid gas simultaneously.

Wherein, the inside fixedly connected with flue gas heater 13 of connecting pipe between the output of heat exchanger 12 and the input of SCR denitration reactor 14 is convenient for better heating the flue gas of sixty degrees centigrade after the wet process deacidification.

Wherein, the output of SCR denitration reactor 14 passes through connecting pipe fixedly connected with chimney 15, and the flue gas after the better denitration of being convenient for discharges.

Wherein, the bottom ash discharge mouth fixedly connected with of dust precipitator 3 returns with pipe 16 in advance, and the one end that first retrieval and utilization pipe 16 kept away from dust precipitator 3 in advance is with the dry position fixed connection of two-stage process of rotary kiln 1, is convenient for collect and return the recycling in rotary kiln 1 with most dust in the flue gas.

Wherein, exhaust-heat boiler 4's input passes through connecting pipe fixedly connected with alloy stove 5, and exhaust-heat boiler 4's bottom ash discharge mouth fixedly connected with second recycling pipe 17, and the one end that exhaust-heat boiler 4 was kept away from to second recycling pipe 17 is connected with the two-stage segment drying part fixed connection of rotary kiln 1, is convenient for the better lime that smelts rotary kiln 1 output.

Specifically, the method comprises two flue gas purification treatments, wherein the first treatment comprises the steps of cooling the dusty high-temperature flue gas produced by the rotary kiln 1 to about three hundred and fifty ℃ by a first cooler 2, then passing the flue gas through a pre-deduster 3, collecting most of dust in the flue gas, sending the collected dust back to the rotary kiln 1 through a first recycling pipe 16 for recycling, passing the collected dust through a dry reaction tower 6 and an active carbon injection device 18 for operation by a dry powder injection device 7 and an active carbon injection device 18, namely performing dry deacidification by baking soda or lime hydrate and adsorption and removal of dioxin by active carbon, performing high-efficiency dedusting by a bag type deduster 8, controlling the emission of flue gas particles, simultaneously performing innocent treatment on the collected dust, controlling the emission of acid gas by two-stage wet deacidification, wherein mainly used deacidification agents comprise sodium bicarbonate, lime hydrate, calcium carbonate and other solutions, controlling the emission of aerosol and dusty liquid drops by an electric demister 11, sixty ℃ flue gas after wet deacidification needs to be subjected to GGH heat exchange and combustion or steam heating, nitrogen oxides are removed through an SCR denitration reactor 14 after the temperature requirement of SCR denitration reaction is met, and finally the flue gas is discharged from a chimney 15 at a proper temperature and reaches the standard; the second place is that the furnace 5 smelts the glorious sand produced by the rotary kiln 1, then the high-temperature smoke enters the pre-deduster 3 after passing through the waste heat boiler 4, most of the dust in the smoke is collected and sent back to the rotary kiln 1 for reuse through the first reuse pipe 16, and then the smoke can be purified through the same operation and the subsequent purification process.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Metal sludge resourceful treatment and flue gas purification system, including rotary kiln (1), its characterized in that, the flue gas output of rotary kiln (1) passes through first cooler (2) of connecting pipe fixedly connected with, the output of first cooler (2) passes through connecting pipe fixedly connected with preliminary precipitator (3), the input fixedly connected with third retrieval and utilization pipe (19) of preliminary precipitator (3), the one end fixedly connected with exhaust-heat boiler (4) of preliminary precipitator (3) is kept away from to third retrieval and utilization pipe (19), the output of preliminary precipitator (3) passes through connecting pipe fixedly connected with dry-type reaction tower (6), the output of dry-type reaction tower (6) passes through connecting pipe fixedly connected with bag collector (8), the output of bag collector (8) passes through connecting pipe fixedly connected with exhaust fan (9), the output of exhaust fan (9) passes through connecting pipe fixedly connected with deacidification tower (10), the output of deacidification tower (10) passes through connecting pipe fixedly connected with electric demister (11), the output of electric demister (11) passes through connecting pipe fixedly connected with heat exchanger (12), the output of heat exchanger (12) passes through connecting pipe fixedly connected with SCR denitration reactor (14).

2. The metal sludge recycling treatment and flue gas purification system according to claim 1, wherein ash discharge openings are formed at the bottoms of the pre-dust collector (3), the dry reaction tower (6), the bag type dust collector (8), the deacidification tower (10) and the electric demister (11).

3. The metal sludge recycling treatment and flue gas purification system according to claim 1, wherein one end of the top of the dry reaction tower (6) is fixedly connected with a dry powder injection device (7) through a connecting pipe, and one side of the top of the dry reaction tower (6) which is positioned on the dry powder injection device (7) is fixedly connected with an activated carbon injection device (18) through a connecting pipe.

4. The metal sludge resource treatment and flue gas purification system as claimed in claim 1, wherein a flue gas heater (13) is fixedly connected inside a connecting pipe between the output end of the heat exchanger (12) and the input end of the SCR denitration reactor (14).

5. The metal sludge resource treatment and flue gas purification system as claimed in claim 1, wherein the output end of the SCR denitration reactor (14) is fixedly connected with a chimney (15) through a connecting pipe.

6. The metal sludge recycling treatment and flue gas purification system according to claim 1, wherein a first return pipe (16) is fixedly connected to a bottom ash discharge port of the pre-deduster (3), and one end of the first return pipe (16) far away from the pre-deduster (3) is fixedly connected to a second-stage drying part of the rotary kiln (1).

7. The metal sludge recycling treatment and flue gas purification system according to claim 1, wherein an input end of the waste heat boiler (4) is fixedly connected with the alloy furnace (5) through a connecting pipe, a bottom ash discharge port of the waste heat boiler (4) is fixedly connected with a second recycling pipe (17), and one end of the second recycling pipe (17) far away from the waste heat boiler (4) is fixedly connected with a second section drying part of the rotary kiln (1).