CN215570464U

CN215570464U - Cement kiln co-processing household garbage improvement system

Info

Publication number: CN215570464U
Application number: CN202121945243.4U
Authority: CN
Inventors: 周佳; 刘爱平
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-18
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses an improved system for cooperatively treating household garbage by a cement kiln, and belongs to the technical field of municipal household garbage treatment. An improved system for co-processing household garbage by a cement kiln comprises a garbage feeding system, a solid garbage burning system, a kiln tail system, a slag discharging system, an odor treatment system and a leachate treatment system; the odor treatment system, the leachate treatment system and the solid waste incineration system are respectively connected with the waste feeding system, the solid waste incineration system is connected with the slag discharge system, a waste storage pit is transported and stored by a waste transport vehicle, a leachate treatment device is arranged at the bottom of the waste storage pit, and a crusher is arranged on one side of the waste storage pit; the utility model effectively solves the problems of large manual adjustment amount, low automation level of treatment and poor stability and thoroughness of treatment in the existing treatment process.

Description

Cement kiln co-processing household garbage improvement system

Technical Field

The utility model relates to the technical field of municipal domestic waste treatment, in particular to an improved system for treating domestic waste by using a cement kiln in a coordinated manner.

Background

Along with the improvement of living standard of people, the emission of domestic garbage is more and more, the stockpiling amount of domestic garbage in cities in China reaches 60 hundred million tons, 5 hundred million square meters of cultivated land is occupied, 2 hundred million tons of domestic garbage are generated every year, the domestic garbage is rapidly increased at a speed of 9 percent, the huge quantity of domestic garbage forms increasingly serious threats to the ecological environment of cities and the surroundings of the cities, the traditional garbage treatment method comprises a landfill method, a composting method and an incineration method, the municipal garbage treatment in China starts late, at present, the municipal garbage is mainly subjected to sanitary landfill, although garbage incineration and a power plant are established in some cities, because the treatment amount is small, the treatment process is accompanied with the emission problems of harmful gas (dioxin), sewage (garbage percolate), waste residues (high content of heavy metal) and the like, the garbage incineration method still has certain controversy at present, the unique production process of cement production provides excellent conditions for treating the municipal domestic garbage, domestic garbage is treated by using a cement kiln together abroad for nearly 30 years.

Utilize cement kiln coprocessing city domestic waste at present, on the one hand can utilize the cement system of firing to digest foul smell and toxic substance among the refuse treatment process, on the other hand, the lime-ash that the waste incineration produced can regard as the cement admixture to use, the toxic substance in the rubbish can be decomposed into corresponding inorganic matter and heavy metal solidification in cement clinker, and simultaneously, the part high temperature waste gas that the cement kiln system produced can regard as the supplementary heat source or the whole heat source of waste incineration, make the burning process of rubbish more abundant, further reduce the emission of dioxin.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to provide a system for cooperatively disposing domestic garbage by a cement kiln, which aims to solve the problems in the background technology:

the prior treatment process has the problems of large manual adjustment amount, low automation level of treatment and poor stability and thoroughness of treatment.

2. Technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme:

an improved system for co-processing household garbage by a cement kiln comprises a garbage feeding system, a solid garbage burning system, a kiln tail system, a slag discharging system, an odor treatment system and a leachate treatment system; odor treatment system, filtration liquid processing system and solid waste incineration system are connected with rubbish charge-in system respectively, solid waste incineration system and slag discharging system are connected, filtration liquid processing system includes filtration liquid processing apparatus, rubbish charge-in system includes rubbish storage hole and feed arrangement, the rubbish storage hole is stored through refuse transport vehicle transportation, the bottom in rubbish storage hole is equipped with filtration liquid processing apparatus, one side in rubbish storage hole is equipped with the breaker.

Preferably, a bridge crane is arranged above the garbage storage pit, a group of hydraulic grab buckets are arranged at the bottom of the bridge crane and located above the feeding device, and the feeding device is connected with the solid garbage incineration system.

Preferably, the solid waste incineration system comprises a waste incinerator, a primary fan and a steam heat exchanger, wherein an inlet of the waste incinerator is connected with an outlet of the feeding device, a smoke and air outlet of the waste incinerator is connected with a smoke and air inlet of the cement kiln decomposing furnace, an air inlet of the waste incinerator is sequentially connected with the primary fan and the steam heat exchanger, an air inlet of the steam heat exchanger is connected with an outlet of the grate cooler, and the steam heat exchanger is connected with the bypass air release boiler.

Preferably, kiln tail system includes high temperature fan, kiln tail boiler, humidifying tower, dust collector, raw material mill, tail exhaust fan and kiln tail chimney, one side of kiln tail boiler is connected with multi-stage preheater, multi-stage preheater connects the cement kiln dore furnace, one side that multi-stage preheater was kept away from to the kiln tail boiler is connected with high temperature fan, high temperature fan grinds respectively with the raw material and passes through pipeline fixed connection with humidifying tower, the one end fixedly connected with dust collector of keeping away from high temperature fan of humidifying tower, the one end that humidifying tower was kept away from to the dust collector is equipped with the tail exhaust fan, the one end that humidifying tower was kept away from to the dust collector is connected with kiln tail chimney through the tail exhaust fan.

Preferably, the slag discharging system comprises a scraper slag salvaging machine, a magnetic separator and a belt conveyor, one end of the scraper slag salvaging machine is connected with the belt conveyor, the other end of the scraper slag salvaging machine is connected with an outlet of the garbage incinerator, and the scraper slag salvaging machine conveys slag to the interior of the magnetic separator through the belt conveyor.

Preferably, the odor treatment system comprises a two-stage spraying device and an active carbon adsorption device, the garbage storage pit is connected with an odor treatment device through a pipeline, and one side of the odor treatment device is provided with an exhaust fan.

Preferably, a negative pressure state is maintained in the garbage storage pit.

3. Advantageous effects

The utility model perfectly combines the waste grate furnace incineration technology and the novel dry cement sintering technology, gives full play to the advantages of the two technologies to the maximum extent, has no 'post-treatment', completely gives the waste gas treatment to a cement sintering system, saves the investment, improves the emission, reduces the operation and maintenance cost, keeps the temperature of the flue gas at the hearth outlet of the waste incinerator at not less than 950 ℃, has the retention time of more than 2 seconds, continuously stays for 6 seconds in the high-temperature environment of more than 850 ℃ after entering a decomposing furnace, thoroughly decomposes organic matters such as dioxin and the like when the waste gas enters the decomposing furnace, has the same temperature as the decomposing furnace, has little influence on the production of a kiln line, mainly contains carbon, hydrogen, oxygen and other elements in the organic matters in the domestic garbage, can be decomposed in the high-temperature environment of a cement kiln system, and inorganic matters mainly contain silicon, aluminum, iron and calcium which are required by cement raw materials, are components of the cement raw materials, and can not influence on the quality of cement products, sorting is not needed, crushing is not needed, the trouble of pretreatment is saved, the system maintenance workload is small, overhaul is less, operation is stable, the whole cooperative disposal area is operated under the full negative pressure, the extracted gas is sent to the garbage incinerator, and meanwhile, when a cement line is stopped, a high-efficiency deodorization device is arranged, the purpose of effectively controlling odor diffusion is achieved, no interference is caused to a cement plant, the garbage leachate is sprayed into the garbage incinerator to be combusted, the garbage leachate is harmlessly treated, zero emission is realized, the alkaline solid phase atmosphere in a firing system is used for effectively inhibiting the emission of acidic substances, so that the salts synthesized with chemical components such as Cl and the like are fixed, the amount of dioxin generated after the incineration treatment is reduced, the acidic gases such as HCl and the like are discharged from a chimney, the garbage incineration ash is prepared into raw materials which are fired into clinker through a rotary kiln, the problem of slag emission is avoided, and the whole system is operated under the negative pressure, the smoke and dust almost have no leakage problem, all components are treated, the volume reduction and the reduction are thorough, and the problems of large manual adjustment amount, low automation level of treatment and poor stability and thoroughness of treatment in the treatment process are effectively solved.

Drawings

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

The reference numbers in the figures illustrate:

1. a refuse transport vehicle; 2. a refuse storage pit; 3. a hydraulic grab bucket; 4. a bridge crane; 5. a feeding device; 6. a garbage incinerator; 7. a primary air fan; 8. a steam heat exchanger; 9. a cement kiln decomposing furnace; 10. a multi-stage preheater; 11. a high temperature fan; 12. a kiln tail boiler; 13. a humidifying tower; 14. a dust collector; 15. grinding raw materials; 16. a tail exhaust fan; 17. a kiln tail chimney; 18. a scraper slag conveyor; 19. a magnetic separator; 20. a belt conveyor; 21. an odor treatment device; 22. an exhaust fan; 23. a leachate treatment device; 24. a bypass air bleeding boiler; 25. a crusher.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1, an improved system for co-processing domestic garbage in a cement kiln comprises a garbage feeding system, a solid garbage burning system, a kiln tail system, a slag discharging system, an odor treatment system and a leachate treatment system; the odor treatment system, the leachate treatment system and the solid waste incineration system are respectively connected with the waste feeding system, the solid waste incineration system is connected with the slag discharge system, the leachate treatment system comprises a leachate treatment device 23, the waste feeding system comprises a waste storage pit 2 and a feeding device 5, the waste storage pit 2 is transported and stored by a waste transport vehicle 1, the leachate treatment device 23 is arranged at the bottom of the waste storage pit 2, and a crusher 25 is arranged on one side of the waste storage pit 2; the garbage storage pit 2 is kept in a negative pressure state; a bridge crane 4 is arranged above the garbage storage pit 2, a group of hydraulic grab buckets 3 are arranged at the bottom of the bridge crane 4, the hydraulic grab buckets 3 are located above a feeding device 5, and the feeding device 5 is connected with a solid garbage incineration system.

The solid waste incineration system comprises a waste incinerator 6, a primary fan 7 and a steam heat exchanger 8, wherein an inlet of the waste incinerator 6 is connected with an outlet of a feeding device 5, a smoke and air outlet of the waste incinerator 6 is connected with a smoke and air inlet of a cement kiln decomposing furnace 9, the primary fan 7 and the steam heat exchanger 8 are sequentially connected with an air inlet of the waste incinerator 6, an air inlet of the steam heat exchanger 8 is connected with an outlet of a grate cooler, and the steam heat exchanger 8 is connected with a bypass air discharging boiler 24.

Kiln tail system includes high temperature fan 11, kiln tail boiler 12, humidifying tower 13, dust collector 14, raw meal grinds 15, tail exhaust fan 16 and kiln tail chimney 17, one side of kiln tail boiler 12 is connected with multi-stage preheater 10, multi-stage preheater 10 connects cement kiln decomposing furnace 9, one side that multi-stage preheater 10 was kept away from to kiln tail boiler 12 is connected with high temperature fan 11, high temperature fan 11 passes through pipeline fixed connection with raw meal mill 15 and humidifying tower 13 respectively, humidifying tower 13's the one end fixedly connected with dust collector 14 of keeping away from high temperature fan 11, the one end that humidifying tower 13 was kept away from to dust collector 14 is equipped with tail exhaust fan 16, the one end that humidifying tower 13 was kept away from to dust collector 14 is connected with kiln tail chimney 17 through tail exhaust fan 16.

The slag discharging system comprises a scraper slag conveyor 18, a magnetic separator 19 and a belt conveyor 20, one end of the scraper slag conveyor 18 is connected with the belt conveyor 20, the other end of the scraper slag conveyor is connected with an outlet of the garbage incinerator 6, and the scraper slag conveyor 18 conveys slag to the inside of the magnetic separator 19 through the belt conveyor 20.

The odor treatment system comprises a two-stage spraying device and an active carbon adsorption device, the garbage storage pit 2 is connected with an odor treatment device 21 through a pipeline, and one side of the odor treatment device 21 is provided with an exhaust fan 22.

The garbage transport vehicle 1 of the utility model transports and unloads garbage into a garbage storage pit 2, a hydraulic grab bucket 3 is arranged above the garbage storage pit 2, the garbage is grabbed and sent to a hopper at the upper part of a feeding device 5 of a garbage incinerator 6, the feeding device 5 then sends the garbage into the garbage incinerator 6 for combustion, the combustion air of the garbage incinerator 6 comes from outdoor air and foul gas generated by the garbage storage pit 2, the garbage is dried, combusted and burned out in the garbage incinerator 6, high-temperature flue gas generated by the incineration of the garbage in the garbage incinerator 6 is completely sent to a cement kiln decomposing furnace 9 through a high-temperature flue for high-temperature incineration, harmful gas such as dioxin and the like generated by the incineration of the garbage is absorbed and treated by utilizing the high-temperature alkaline condition about 880 ℃ in the cement kiln decomposing furnace 9, toxic organic matters are thoroughly decomposed, meanwhile, partial fuel of the cement kiln decomposing furnace 9 can be replaced, and slag after the garbage incineration is collected by a slag discharge system, and the waste gas is discharged to a subsequent slag treatment system to remove metal substances, then the waste gas is conveyed to a raw material batching station to participate batching and grinding to form raw material powder, the raw material powder is calcined into cement clinker by a rotary kiln system, heavy metal harmful elements are dissolved in the clinker, the garbage incinerator 6 is started to burn by hot air and fuel oil from a kiln head grate cooler, the garbage incinerator 6 is heated to a certain temperature and then incinerated, when the heat value of the garbage is very low (lower than 1000kCal/kg), a proper amount of diesel oil is sprayed into the incinerator to support combustion so as to ensure the stable combustion of the garbage, the temperature of the smoke gas at the hearth outlet of the garbage incinerator 6 is kept at not lower than 950 ℃, the retention time is far more than 2 seconds, the smoke gas continuously stays for 6 seconds in an environment with the temperature of more than 850 ℃ after entering a cement kiln decomposing furnace 9, the decomposition furnace 9 thoroughly decomposes organic matters such as dioxin, and the temperature of the waste gas when entering the cement kiln decomposing furnace 9 is equivalent to the temperature of the cement kiln decomposing furnace 9, the influence on the production of a kiln line is small, malodorous gas in a garbage storage pit 2 is discharged through an air port arranged at the upper part of the garbage storage pit 2 and is sent into an odor treatment device 21 for treatment, the malodorous gas is discharged into the atmosphere by an exhaust fan 22 after reaching the national malodorous discharge standard, percolate generated in the storage process of the garbage is concentrated in a waste liquid storage tank, the percolate treated by the percolate treatment device 23 is sprayed into a garbage incinerator 6 for high-temperature evaporation and oxidation treatment, organic components are decomposed by virtue of the thermal inertia of the percolate, the residence time of the garbage on a grate is about 1.5 to 2.5 hours, a primary fan 7 is arranged at the lower part of the grate surface for supplying air required by the combustion of the garbage and cooling grate segments, a front arch and a rear arch are arranged on a hearth to strengthen the thermal radiation of the garbage on the grate, secondary air is injected into the furnace through nozzles arranged at the front arch and the rear arch of the hearth to strengthen the disturbance of flue gas and prolong the combustion stroke of the flue gas, set up the flame monitor behind the stove, make the operating personnel can observe the combustion situation in the furnace at any time in the central control room, the grate furnace reserves in-furnace filtration liquid and returns the spout, the grate furnace burns the technique and includes complete automatic combustion control logic, can realize independently burning the adjustment according to this configuration, it is great that effectual manual adjustment volume is great in having solved the processing procedure, the automation level of handling is lower, the stability of handling and the relatively poor problem of thoroughness.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.

Claims

1. An improved system for cooperatively treating household garbage by a cement kiln is characterized by comprising a garbage feeding system, a solid garbage incineration system, a kiln tail system, a slag discharge system, an odor treatment system and a leachate treatment system; odor treatment system, filtration liquid processing system and solid waste incineration system are connected with rubbish charge-in system respectively, solid waste incineration system and slag discharging system are connected, filtration liquid processing system includes filtration liquid processing apparatus (23), rubbish charge-in system includes rubbish storage hole (2) and feed arrangement (5), rubbish storage hole (2) are stored through the transportation of refuse transport vehicle (1), the bottom of rubbish storage hole (2) is equipped with filtration liquid processing apparatus (23), one side of rubbish storage hole (2) is equipped with breaker (25).

2. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: garbage storage hole (2) top is equipped with bridge crane (4), the bottom of bridge crane (4) is equipped with a set of hydraulic grab (3), and hydraulic grab (3) are located the top of feed arrangement (5), feed arrangement (5) and solid waste incineration system are connected.

3. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: the solid waste incineration system comprises a waste incinerator (6), a primary fan (7) and a steam heat exchanger (8), wherein an inlet of the waste incinerator (6) is connected with an outlet of a feeding device (5), a smoke and air outlet of the waste incinerator (6) is connected with a smoke and air inlet of a cement kiln decomposing furnace (9), the primary fan (7) and the steam heat exchanger (8) are sequentially connected with an air inlet of the waste incinerator (6), an air inlet of the steam heat exchanger (8) is connected with a grate cooler outlet, and the steam heat exchanger (8) is connected with a bypass air discharging boiler (24).

4. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: the kiln tail system comprises a high-temperature fan (11), a kiln tail boiler (12), a humidifying tower (13), a dust collector (14), a raw meal mill (15), a tail exhaust fan (16) and a kiln tail chimney (17), one side of the kiln tail boiler (12) is connected with a multi-stage preheater (10), the multi-stage preheater (10) is connected with a cement kiln decomposing furnace (9), one side of the kiln tail boiler (12) far away from the multi-stage preheater (10) is connected with a high-temperature fan (11), the high-temperature fan (11) is respectively fixedly connected with the raw meal mill (15) and the humidifying tower (13) through pipelines, one end of the humidifying tower (13) far away from the high-temperature fan (11) is fixedly connected with a dust collector (14), a tail exhaust fan (16) is arranged at one end of the dust collector (14) far away from the humidifying tower (13), and one end of the dust collector (14) far away from the humidifying tower (13) is connected with a kiln tail chimney (17) through a tail exhaust fan (16).

5. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: the slag discharging system comprises a scraper slag salvaging machine (18), a magnetic separator (19) and a belt conveyor (20), one end of the scraper slag salvaging machine (18) is connected with the belt conveyor (20), the other end of the scraper slag salvaging machine is connected with an outlet of the garbage incinerator (6), and the scraper slag salvaging machine (18) conveys slag to the inside of the magnetic separator (19) through the belt conveyor (20).

6. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: the odor treatment system comprises a two-stage spraying device and an active carbon adsorption device, the garbage storage pit (2) is connected with an odor treatment device (21) through a pipeline, and one side of the odor treatment device (21) is provided with an exhaust fan (22).

7. The improved system for cement kiln co-disposal of household garbage according to claim 1, wherein: the interior of the garbage storage pit (2) is maintained in a negative pressure state.