CN213840926U

CN213840926U - Domestic waste gasification incineration treatment system

Info

Publication number: CN213840926U
Application number: CN202021967186.5U
Authority: CN
Inventors: 肖喜才
Original assignee: Changsha Zhongsi Environmental Protection Technology Co ltd
Current assignee: Changsha Zhongsi Environmental Protection Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-07-30
Anticipated expiration: 2030-09-10

Abstract

A household garbage gasification incineration treatment system comprises a closed pretreatment system, a combined pyrolysis incinerator, a wastewater treatment system and a waste gas treatment system; domestic waste loops through rubbish shredder and magnetic separation and vortex current sorter and then gets into rubbish temporary storage storehouse, goes out of the storehouse and is dried and burns through combination formula pyrolysis incinerator, and the cement kiln is sent into to the lime-ash, and effluent disposal system includes rubbish leachate pool and sewage collecting pit, and exhaust treatment system includes closed pretreatment system gas collecting device and combination formula pyrolysis incinerator gas collecting device, links to each other with vertical incinerator air inlet after the gas collection. The utility model discloses a domestic waste gasification incineration disposal system adopts the gasification incineration technique outside the cement kiln, keeps apart the moisture furthest in rubbish outside the cement kiln, reduces the too high and composition fluctuation of rubbish moisture and to the influence of cement kiln system, creates the condition for the big batch coprocessing waste of cement kiln.

Description

Domestic waste gasification incineration treatment system

Technical Field

The utility model belongs to the technical field of domestic waste handles, concretely relates to domestic waste gasification incineration disposal system.

Background

The co-processing of the solid waste by the cement kiln refers to a waste disposal means for realizing the purposes of decomposition, degradation, elimination, inertization, stabilization and the like of toxic properties of the solid waste through high-temperature incineration and a cement clinker mineralized high-temperature sintering process. The heat exchanger has the technical advantages of wide application range, large consumption, strong adaptability to various wastes, large heat capacity, large thermal inertia and high heat transfer efficiency. The core of the technology for cooperatively treating the domestic garbage and the solid waste by the cement kiln is to utilize combustible components and ash slag materials in the domestic garbage and the waste in the production process of cement and apply a proper technical scheme to make the garbage harmless, reduced, recycled and energy-recycled.

In recent decades, the development of the cooperative disposal of solid waste by cement kilns has been fast, and is proposed in the State Council of several opinions on the accelerated structural adjustment of the cement industry: "perfecting standard system on the basis of full experimental research, guiding cement industry to scientifically and reasonably utilize and treat waste". During the 'one-half-a-five' period, the cement industry utilizes more than 4 hundred million tons of solid wastes to build a technical demonstration project for harmlessly and cooperatively disposing municipal domestic wastes, municipal sludge and various solid wastes in a batch of cement kilns. The treaty of the Basel convention states that "the synergistic disposal of hazardous waste during cement production has been considered an environmentally friendly treatment"; the cement kiln co-disposal solid waste technology has been widely accepted and applied in western developed countries. The technical specification of the cement kiln co-processing solid waste issued in 2014 defines the basic principle and the technical direction for the cement kiln co-processing solid waste.

At present, the technology for treating solid waste by the cooperation of a cement kiln is also rapidly developed, and the reflection of various data and production test routes is basically the following technical ideas:

1. alternative raw material (fuel) method

Directly doping the garbage into other materials to prepare derived raw materials or low-level fuels, and then carrying out cement kiln treatment; this technical route requires the local availability of various waste materials that can participate in the formulation of household waste.

2. Outside furnace process

A garbage incinerator is built in parallel with the cement kiln, hot flue gas or radiant heat of the cement kiln is used for supporting combustion or drying garbage, and the flue gas, residues, percolate and the like after the garbage incineration are respectively treated by the cement kiln. Such as Zhongzhong, Luoyang, Haizhan, Manzhuang and fertilizer-synthesizing institute. The technological processes of the various modes are similar, and the difference is mainly in the form of a garbage incinerator. The conch CKK uses the garbage vaporization technology, and the garbage is burned in the furnace and partially vaporized. The principle of overall co-treatment is the same.

3. Series furnace process

The method is characterized in that a garbage incinerator is built on a cement kiln on line, namely, the garbage incinerator is additionally arranged on a hot air pipeline at the head or the tail of the cement kiln, for example, a Smith hot plate furnace technology additionally provided with a tertiary air pipe is utilized. The incineration of the garbage can be directly involved in the original production of the cement.

4. Garbage pretreatment method

The method is characterized by comprising the following steps of (1) strengthening household garbage pretreatment, namely classifying the garbage by using a medium material technology and then respectively treating the garbage by using a cement kiln. The method can recover useful components after classification for garbage which is not subjected to primary selection, and has complicated process and increased production cost for garbage which is subjected to primary selection or useful substances are selected.

Secondly, preparing the garbage substituted fuel by microbial fermentation and drying, and supplying the sludge kiln to substitute the fuel, such as the Huaxinwu acupoint technology. The method for treating garbage by fermentation can reduce the combustion heat value of the garbage although being beneficial to the combustion of the garbage, and can cause peculiar smell and odor emission due to the use of the garbage for fermentation.

The application of various cooperative disposal technologies cannot separate the pretreatment of the original ecological domestic garbage, such as manual or mechanical separation to reduce building garbage, metal and the like; primary or secondary crushing for conveying and feeding; the medicament or the machine dehydrates to reduce moisture entering the subsequent processing equipment. The different process lines differ from one another only in the degree of pretreatment. In any process route, as long as the principle of harmless and environment-friendly disposal is followed, the treatment of waste liquid and odor generated in various links after the waste enters a factory must be considered, and generally, the waste liquid and the odor are returned to a mud kiln system in different modes. Even if the dewatered garbage is incinerated or vaporized, the water which is not dewatered still enters the kiln in a gaseous state.

Considering negative influence factors brought by the cooperative treatment of the garbage in the cement production, the novel dry-method cement kiln is used for controlling the influence of various harmful elements (including potassium, sodium, chlorine, sulfur, heavy metals and the like) brought by the garbage on the product quality, the process condition in the kiln and the like; and secondly, a large amount of moisture brought by the cooperative treatment is controlled, so that the moisture content of the flue gas of the kiln system is prevented from rising, the space of the original hot air is occupied, and the normal operation of the kiln system is potentially influenced. For the above reasons, the amount of domestic waste that can be treated by the cement kiln system under the same conditions is limited to various degrees.

For harmful elements, a harmful substance separation system is added when garbage disposal is mentioned in the CKK gasification incineration technology, and actually, the harmful elements are discharged by a bypass. The bypass air release technology is a mature technology for treating excessive chlor-alkali or sulfur-alkali materials in a novel dry cement kiln to cause the skinning and blocking of a preheater at the tail of the cement kiln. The bypass technology is feasible for the exceeding of the harmful substances caused by the incineration of the garbage.

The potential water content of the garbage is high, generally 40-50%, the potential water content is higher than 60%, the garbage is difficult to burn due to a large amount of water in incineration, and a large amount of water vapor generated in burning can increase the flue gas humidity of the cement kiln, reduce the temperature of the system and bring negative effects to the safe operation, energy conservation and consumption reduction of the cement kiln. Therefore, in the waste incineration process, most of the waste incinerators are provided independently to incinerate waste, and the process of directly incinerating waste in a cement kiln is difficult to realize. Meanwhile, the waste heat value and ash component fluctuation are large, so that the width of a cement kiln is unstable during large-scale treatment, and the cement yield and the cement product quality are affected.

The independent garbage incineration process requires that the garbage incineration has an incineration temperature of over 850 ℃ in order to eliminate the influence of dioxin, so combustion can be completed only by adding combustion-supporting fuel in the combustion, which cannot fully utilize the favorable conditions of the high-temperature alkaline environment of the cement kiln and causes the increase of the garbage disposal cost and the capital investment. Therefore, in order to fully exert the special advantages of the cement kiln for the cooperative treatment of the garbage, reduce the capital investment, improve the garbage treatment capacity and improve the adaptability of the garbage, a new household garbage gasification incineration treatment system is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem among the prior art, the utility model provides a domestic waste gasification incineration disposal system, domestic waste directly get into combination formula pyrolysis incinerator after the breakage and gasify and burn, and exhaust gas carries out reuse after burning, and the exhaust lime-ash after burning selects to require as cement raw materials according to cement ratio after the metal, and landfill leachate directly sends into cement kiln and replaces partial denitrifier, realizes domestic waste's innoxious resourceful treatment.

In order to achieve the above object, the utility model discloses a following technical scheme realizes:

a household garbage gasification incineration treatment system comprises a closed pretreatment system, a combined pyrolysis incinerator, a wastewater treatment system and a waste gas treatment system;

the closed pretreatment system is sequentially provided with a discharging room, a garbage shredder and a temporary garbage storage, wherein the bottoms of the discharging room and the temporary garbage storage are provided with permeability nets, and the permeability nets are connected with a leachate pool through pipelines;

the combined pyrolysis incinerator comprises a high-temperature flue gas chamber, a rotary kiln and a vertical incinerator, wherein the high-temperature flue gas chamber is wrapped outside the rotary kiln, the rotary kiln is connected with the vertical incinerator, and a discharge port of a garbage temporary storage is connected with a feed port of the rotary kiln;

the waste water treatment system comprises a garbage leachate tank and a sewage collection tank, wherein a water inlet of the garbage leachate tank is connected with a water outlet of a permeability net of the temporary garbage storage, a water outlet of the garbage leachate tank is connected with the cement kiln, a water inlet of the sewage collection tank is connected with a water outlet of the permeability net of the discharge room, and a water outlet of the sewage collection tank is connected with the garbage leachate tank;

the waste gas treatment system comprises a closed pretreatment system gas collecting device and a combined pyrolysis incinerator gas collecting device, and the closed pretreatment system gas collecting device is connected with the combined pyrolysis incinerator gas collecting device and then connected with the vertical incinerator gas inlet.

As an optional implementation mode, the utility model provides an among the domestic waste gasification incineration disposal system, the unloading room with link to each other through first conveyer between the rubbish temporary storage storehouse, link to each other through second conveyer between rubbish temporary storage storehouse and the rotary kiln feed inlet, first conveyer and second conveyer are equipped with the sealed storehouse respectively, set up the sealed storehouse and are used for guaranteeing the gaseous collection of different smelly.

As an optional implementation mode, in the household garbage gasification incineration treatment system provided by the utility model, be equipped with the recess on the sleeve outer wall, the sleeve pass through the recess joint in on the sleeve installation mouth of sleeve installation piece.

As an optional implementation mode, the utility model provides an among the domestic waste gasification incineration disposal system, first conveyer includes feeding machine and first band conveyer, and the feed inlet of feeding machine links to each other with the pit of unloading in the room, and the discharge gate of feeding machine links to each other with the feed inlet of rubbish shredder, and the discharge gate of rubbish shredder links to each other with the feed inlet of first band conveyer, and the discharge gate of first band conveyer links to each other with rubbish temporary storage storehouse feed inlet.

As an optional implementation mode, in the domestic waste gasification incineration disposal system provided by the utility model, the discharge gate of rubbish shredder links to each other with first magnetic separation and eddy current sorter, and the ash hole that the combination formula pyrolysis burns burning furnace links to each other with second magnetic separation and eddy current sorter.

As an optional embodiment, in the domestic waste gasification incineration processing system provided by the utility model, the ash outlet of combined type pyrolysis incinerator links to each other with ash storehouse feed inlet after passing through second magnetic separation and eddy current sorter, ash storehouse feed inlet is equipped with dust arrester installation.

As an optional implementation mode, in the household garbage gasification incineration disposal system provided by the utility model, the second conveyer includes weigher and second belt conveyor, the feed inlet of weigher with the ejection of compact machine links to each other, and the discharge gate of weigher links to each other with the feed inlet of second belt conveyor, the discharge gate of second belt conveyor with the rotary kiln feed inlet links to each other.

As an optional implementation mode, in the household garbage gasification incineration treatment system provided by the utility model, rubbish temporary storage is cylinder type warehouse storehouse, and upper portion is equipped with feed inlet and gas suction mouth, and the bottom is equipped with at least one discharge gate, the discharge gate bottom is equipped with out the material machine, it links to each other with the discharge gate to go out the material machine aircraft bonnet.

As an optional implementation mode, the utility model provides an among the domestic waste gasification incineration disposal system, closed pretreatment system gas collecting device links to each other with deodorization and peculiar smell annihilator with combination formula pyrolysis incinerator gas collecting device after linking to each other.

As an optional implementation mode, in the domestic waste gasification incineration treatment system provided by the utility model, the rotary kiln is equipped with vapor and exhanst gas outlet, vapor and exhanst gas outlet link to each other the air inlet with the cooling condenser, cooling condenser gas outlet with sewage collecting pool links to each other.

As an optional implementation mode, in the domestic waste gasification incineration processing system provided by the utility model, the combination formula pyrolysis incinerator still includes lock wind feeder and broken discharge mechanism, lock wind feeder links to each other with the rotary kiln, the rotary kiln links to each other with vertical incinerator, vertical incinerator links to each other with broken discharge mechanism, the high temperature flue gas plenum parcel is in the rotary kiln is outside.

A domestic garbage gasification incineration treatment method comprises the following steps:

1. pretreatment of refuse

The household garbage is conveyed into a discharge pit of a discharge room, garbage sorting is carried out through a screen with the grid side length of 40x40cm, small garbage passing through the screen is crushed through a garbage shredder and then metal is sorted through a magnetic separation and eddy current sorting machine, and the rest garbage is conveyed to a garbage temporary storage for storage;

2. incineration treatment of garbage

Conveying the residual garbage in the temporary garbage storage in the step 1 into a rotary kiln of the combined pyrolysis incinerator through a belt conveyor with a sealed bin for drying, directly feeding the dried garbage into a vertical incinerator of the combined pyrolysis incinerator for incineration treatment, drying for 0.5-2h through high-temperature flue gas at 300 ℃ with 200-80%, removing natural moisture and 60-80% of crystal water, incinerating for 0.5-2h at the temperature of not less than 800 ℃, adding a combustion improver for combustion supporting when the incinerator is started or the calorific value of the garbage is insufficient, removing metal from the incinerated ash through a magnetic separation and eddy current separator, and feeding the ash into a cement kiln to serve as a cement raw material;

3. waste liquid treatment

After uniformly collecting the sewage in the unloading room and the garbage percolate discharged from the temporary garbage storage in the step 1, sending the collected sewage and the garbage percolate into a cement kiln to be used as a denitration agent;

4. gas treatment

In the step 1, the discharging room and the temporary garbage storage are in a closed state, discharged gas is collected by an exhaust fan and then used as combustion-supporting gas during incineration, and the flue gas discharged after combustion is sent to a high-temperature section of a cooler of a cement kiln system and is subjected to oxidation deodorization in a cement kiln under high-temperature and strong-alkaline environments.

The utility model discloses beneficial effect as follows:

(1) the utility model discloses a domestic waste gasification incineration disposal system adopts the gasification incineration technique outside the cement kiln, can keep apart the moisture furthest in the rubbish outside the cement kiln, reduce the too high influence to the cement kiln system of rubbish moisture, landfill leachate concentrates the collection in the system, contain the organic matter of certain rubbish mud and CH group in the landfill leachate, the CH group organic matter is fine denitrifier, can directly spout the cement kiln and substitute partial aqueous ammonia as the denitrifier and use, do not need to handle separately. The garbage pretreatment adopts a fully-closed system, forms micro negative pressure by suction of an exhaust fan, prevents foreign odor gas in the garbage from leaking outwards, collects the foreign odor gas, sends the foreign odor gas into an incinerator for use as combustion-supporting gas, sends the flue gas discharged after combustion into a high-temperature section of a cooler of a cement kiln system, and oxidizes and deodorizes the gas in the cement kiln under high-temperature and strong-alkaline environments, thereby effectively avoiding the emission of the foreign odor gas.

(2) The utility model discloses a system adopts the totally enclosed room of unloading and rubbish temporary storage, utilizes inclosed belt conveyor and feed metering equipment to transport rubbish, compares the garage, because the area is little in the storehouse, and sealing condition is good, does not have the material equipment of getting of operation in the storehouse, and the rethread ventilation blower concentrates and airs exhaust and forms little negative pressure in making the storehouse, and the foreign odor gas can not be to leaking outward in the storehouse, realizes that the airtight operation amount of wind is little, is favorable to handling.

(3) The utility model discloses the stoving of well rubbish is accomplished with burning in combination formula pyrolysis incinerator, the stoving does not need to introduce from the cement kiln with burning required heat, unnecessary heat is sent into the cement kiln through the flue gas in, the organic combustible gas that does not burn out in the flue gas burns out at cement kiln high temperature environment completely, utilize the high temperature of cement kiln, strong alkaline environment burns out completely, the remaining possibility of organic matter has been eliminated, the possibility of producing toxic gas secondary pollution such as dioxin is eliminated in the cement kiln of the high temperature strong basicity about 1500 ℃ simultaneously. The generated heat is used as the heat required by cement production, so that the heat consumption of cement production can be reduced. The generated steam is cooled and collected in the drying process, so that the influence of overhigh moisture on a cement kiln system is avoided. Meanwhile, the influence of the production quality of cement caused by the fluctuation of garbage components during large-scale treatment is also reduced.

(4) The utility model discloses a system carries out waste gasification and burns outside the cement kiln, and the rubbish lime-ash gets into cement raw materials through the batching. Therefore, under the same conditions, the process scheme can bring higher fuel substitution rate and garbage treatment capacity. The method can be used for treating fresh household garbage and other high-water-content wastes, such as stale wastes, kitchen wastes, slaughter wastes, food industrial wastes, municipal sludge and the like. Simple process, small investment and complete recycling and harmless treatment of the household garbage.

Drawings

FIG. 1 is a schematic diagram of a treatment system according to the present invention;

FIG. 2 is a schematic view of the combined pyrolysis incinerator of the present invention;

the above reference numerals:

11. a discharging room; 12. a refuse shredder; 13. a garbage temporary storage; 14. sealing the bin; 15. a feeder; 16. A first belt conveyor; 17. a first magnetic and eddy current separator; 18. weighing; 19. a trough second belt conveyor;

131. a feed inlet; 132. a discharge port; 133. a discharging machine;

21. locking the air feeder; 22. a high temperature flue gas chamber; 23. a rotary kiln; 24. a vertical incinerator; 25. a crushing and discharging mechanism; 26. a second magnetic and eddy current separator; 27. a slag warehouse; 28. a dust collecting device;

31. a landfill leachate pond; 32. a sewage collection tank;

41. a deodorizing and odor eliminator;

51. a condenser.

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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example 1

As shown in fig. 1, the present embodiment provides a domestic waste gasification incineration treatment system, which includes a closed pretreatment system, a combined pyrolysis incinerator, a wastewater treatment system, and a waste gas treatment system.

Preferably, the closed pretreatment system is sequentially provided with a discharging room 11, a garbage shredder 12 and a garbage temporary storage 13, wherein the bottoms of the discharging room 11 and the garbage temporary storage 13 are provided with permeation filter screens, the discharging room 11 is connected with the garbage temporary storage 13 through a first conveying device, the garbage temporary storage 13 is connected with the feed inlet of the rotary kiln through a second conveying device, and the first conveying device and the second conveying device are respectively provided with a sealed bin 14.

Preferably, the first conveying device comprises a feeder 15 and a first belt conveyor 16, a feeding hole of the feeder 15 is connected with a discharging pit in the discharging room 11, a discharging hole of the feeder 15 is connected with a feeding hole of the garbage shredder 12, a discharging hole of the garbage shredder 12 is connected with a feeding hole of the first belt conveyor 16, and a discharging hole of the first belt conveyor 16 is connected with a feeding hole of the garbage temporary storage 13.

Preferably, the discharge of the refuse shredder 12 is connected to a first magnetic and eddy current separator 17.

In the specific implementation process, domestic waste adopts special automobile to enter the factory, enters the unloading room 11 after the measurement of automobile electron weighbridge, directly unloads into the discharge pit in the unloading room 11, and the size and the quantity of discharge pit are decided according to the memory space, and in this embodiment, the discharge pit sets up to 1, also can set up a plurality ofly according to the processing scale, and the garbage truck after unloading is disinfected the disinfection facility sterilization and is left the unloading room through the spraying that sets up in the unloading room 11.

The discharge pit top is equipped with the square screen cloth, the length of side of screen cloth is not less than 40x40cm, be convenient for the manual work select the bold rubbish that can not pass through the screen cloth, the bold of electing is handled with the fritter rubbish through shining the net together after the electric hammer is broken, the discharge pit bottom is provided with feeder 15 and is used for forcing the ejection of compact, after feeder 15 sends rubbish to rubbish shredder 12 and carries out rubbish breakage back and select the metal through first magnetic separation and eddy current sorter 17, transport rubbish temporary storage storehouse 13 through first band conveyer 16 and store, wherein rubbish shredder 12 quantity is at least one. In this embodiment, the feeding machine 15 is a plate-type feeding machine, the number of the garbage shredders 12 is 1, wherein the feeding machine 15 and the first belt conveyor 16 are provided with a sealed bin 14, a suction machine is arranged on the sealed bin 14 for suction to form a micro negative pressure so as to prevent odor gas from leaking, and a belt of the belt conveyor can adopt a large-inclination-angle belt, a U-shaped belt and a circular tube-type belt in a specific implementation process.

Preferably, the temporary garbage storage 13 is a cylindrical storage, the upper part of the temporary garbage storage is provided with a feed inlet 131 and a gas suction port, the bottom of the temporary garbage storage is provided with at least one discharge outlet 132, the bottom of the discharge outlet 132 is provided with a discharge machine 133, and the cover of the discharge machine 133 is connected with the discharge outlet 132.

Preferably, the second conveying device comprises a metering scale 18 and a second belt conveyor 19, a feeding port of the metering scale 18 is connected with the discharging machine 133, a discharging port of the metering scale 18 is connected with a feeding port of the second belt conveyor 19, and a discharging port of the second belt conveyor 19 is connected with a feeding port of the rotary kiln.

In this embodiment, the temporary garbage storage 13 is a cylindrical storage, the main body of the cylindrical storage is made of impervious reinforced concrete, the top can be sealed by a net-shaped light steel structure, the upper part is provided with a feed inlet 131 and a gas suction port, the bottom is provided with at least one discharge port 132 according to the size of the cylindrical storage, the number of the discharge ports is 2 in this embodiment, the discharge ports 132 are set to be filter hopper-shaped for discharging, the angle of the inclined plane is not less than 45 degrees, the inclined plane is lined with a smooth and wear-resistant stainless steel plate or an ultra-strong plastic resin plate, the bottom of the discharge port 132 is provided with a discharge machine 133 for forced discharging, in this embodiment, the discharge machine 133 is a plate-type discharge machine, the hood of the plate-type discharge machine is tightly connected with the discharge port 132 of the temporary garbage storage 13 by a steel plate, the discharge hopper of the plate-type discharge machine is connected with the feed inlet of a scale 18, and the garbage is directly fed to the feed inlet of the rotary kiln by a second belt conveyor 19 with a sealed storage after being measured, the second belt conveyor 19 is also provided with a sealed bin, the sealed bin is provided with a suction machine for sucking to form micro negative pressure, peculiar smell gas is prevented from leaking, and the belt of the belt conveyor can adopt a large-inclination-angle belt, a U-shaped belt and a circular tube type belt in the specific implementation process.

Preferably, the combined pyrolysis incinerator comprises a high-temperature flue gas chamber 22, a rotary kiln 23 and a vertical incinerator 24, wherein the high-temperature flue gas chamber 22 is wrapped outside the rotary kiln 23, the rotary kiln 22 is connected with the vertical incinerator 24, and a discharge hole 132 of the garbage temporary storage 13 is connected with a feed hole of the rotary kiln 23.

Preferably, the combined pyrolysis incinerator also comprises an air locking feeder 21 and a crushing discharging mechanism 25, wherein the air locking feeder 21 is connected with the rotary kiln 23, the rotary kiln 23 is connected with the vertical incinerator 24, the vertical incinerator 24 is connected with the crushing discharging mechanism 25, and the high-temperature flue gas chamber 22 is wrapped outside the rotary kiln 23.

In this embodiment, as shown in fig. 2, the combined pyrolysis incinerator includes an air-lock feeder 21, a rotary kiln 23, a vertical incinerator 24, a high-temperature flue gas chamber 22 and a crushing and discharging mechanism 25, the air-lock feeder 21 is connected with the rotary kiln 23, the rotary kiln 23 is connected with the vertical incinerator 24, the vertical incinerator 24 is connected with the crushing and discharging mechanism 25, the high-temperature flue gas chamber 22 is wrapped outside the rotary kiln 23, a cylinder body of the rotary kiln 23 is connected with two ends of the high-temperature flue gas chamber 22 and a casing of the vertical incinerator 23 through sealing rings, wherein the cylinder body of the rotary kiln 23 penetrates through the casing of the high-temperature flue gas chamber 22 and the casing of the vertical incinerator 24 to enter the vertical incinerator 24, and the cylinder body of the rotary kiln 23 is arranged in an inclined descending manner from a feeding end to a discharging end.

The specific structure of the combined pyrolysis incinerator in this embodiment refers to the structure of the combined low melting point heavy metal waste slag smelting furnace in patent document with publication number CN109748526A, and is not described herein again.

In the specific implementation process, the garbage entering the rotary kiln 23 is indirectly heated by the high-temperature flue gas in the high-temperature flue gas chamber 22 to dry the garbage in the cylinder of the rotary kiln 23, the garbage is sucked by the exhaust fan at the tail of the rotary kiln 23, so that micro negative pressure is formed in the rotary kiln 23 to exhaust evaporated water vapor, the water vapor out of the rotary kiln 23 is condensed by the condenser 51, and the non-condensable gas is collected and then enters the vertical gasification furnace 24.

The dried garbage directly enters the vertical incinerator 24 for incineration treatment, high-temperature flue gas enters the high-temperature flue gas chamber 22 through a flue gas outlet in the upper part of the vertical incinerator 24, hot flue gas is discharged from a flue gas outlet in the other side after passing through a gap in the bottom of the partition wall in the high-temperature flue gas chamber 22, and the discharged flue gas is sent into the cement kiln through a high-temperature exhaust fan.

The burned large slag is crushed by a crushing mechanism 25 at the bottom of the vertical incinerator 24 and discharged outside the incinerator.

Preferably, the ash outlet of the combined pyrolysis incinerator is connected with the inlet of an ash storage 27 through a second magnetic separation and eddy current separator 26, wherein the inlet of the ash storage 27 is provided with a dust collecting device 28.

In the specific implementation process, the crushed ash is subjected to metal removal by a second magnetic separation and eddy current separator 26, then is sent into an ash storage 27 for temporary storage, and then is sent into a cement kiln to be used as a cement raw material.

Preferably, the wastewater treatment system comprises a garbage leachate tank 31 and a sewage collecting tank 32, wherein a water inlet of the garbage leachate tank 31 is connected with a water outlet of a permeable filter screen of the temporary garbage storage 13, a water outlet of the garbage leachate tank 31 is connected with the cement kiln, a water inlet of the sewage collecting tank 32 is connected with a water outlet of the permeable filter screen of the discharging room 11, and a water outlet of the sewage collecting tank 32 is connected with the garbage leachate tank 31;

in this embodiment, the landfill leachate mainly comes from landfill leachate generated in the temporary storage, and after passing through the filter screen at the bottom of the temporary storage, the landfill leachate flows out and is collected in the landfill leachate tank 31, the landfill leachate contains certain garbage sludge and CH group organic matters, and the CH group organic matters are good denitrifiers and can be directly sprayed into the cement kiln to be used as the denitrifiers to replace part of ammonia water.

The sewage mainly comes from the sewage generated in the garbage conveying process of the discharging room 11 and the feeding machine 15, flows out after passing through a permeation filter screen at the bottom of the discharging room, is collected in a sewage collecting tank 32, can be completely used as production water after being filtered by a permeation membrane, and a small amount of water treatment sludge obtained after treatment and garbage permeation are also sent into a cement kiln to be used as a denitration agent.

Preferably, the waste gas treatment system comprises a closed pretreatment system gas collecting device and a combined pyrolysis incinerator gas collecting device, and the closed pretreatment system gas collecting device and the combined pyrolysis incinerator gas collecting device are intersected and then connected with the gas inlet of the vertical incinerator 24.

Preferably, the closed pretreatment system gas collecting pipe and the combined pyrolysis incinerator gas collecting pipe intersect and are connected to the deodorization and odor eliminator 41.

In this embodiment, as shown in fig. 1, the exhaust gas refers to the odor gas discharged from the garbage and the odor gas generated after incineration, and the odor gas discharged from the garbage mainly comes from the discharging room 11, the feeding machine 15, the first belt conveyor 16, the temporary garbage storage 13, the discharging machine 133, the weighing scale 18 and the second belt conveyor 19, and the odor gas discharged during operation is pumped by the exhaust fan through the gas discharging pipeline and then sent into the vertical incinerator 24 to be used as combustion-supporting gas.

The odor generated after incineration is mainly high-temperature flue gas generated by the vertical incinerator 24, is discharged, collected and sent to a high-temperature section of a cooler of a cement kiln system, and is subjected to oxidation deodorization in the cement kiln under high-temperature and strong-alkaline environments.

Set up the deodorant mode of active carbon adsorption when the cement kiln is stopped the kiln, gaseous passing through deodorizing device adsorbs the emission up to standard behind the foreign odor smell.

Example 2

The treatment steps of the household garbage by using the treatment system of the utility model are as follows;

firstly, garbage pretreatment

The domestic garbage is fed into a factory by a special automobile, is metered by an automobile electronic wagon balance and then is fed into a discharging room to be directly discharged into a discharging pit arranged in the discharging room, and the garbage truck after being discharged is sterilized and disinfected by a spraying and disinfecting facility arranged in the discharging room to leave the discharging room. After the bold rubbish is elected through the square screen cloth that the length of side at discharge pit top is not less than 40x40cm, carry out rubbish breakage through rubbish shredder after the feeding machine of discharge pit bottom forces the ejection of compact, the bold rubbish of electing carries out rubbish breakage through rubbish shredder again after the electric hammer is broken, after the metal is selected to rubbish after tearing through first magnetic separation and eddy current sorter again, surplus rubbish is transported rubbish temporary storage storehouse through the first band conveyer that has the sealed storehouse and is stored.

Second, waste incineration treatment

Discharging the residual garbage in the temporary garbage storage from the bottom of the temporary garbage storage in a light weight mode, weighing by a weighing scale, conveying the garbage into a rotary kiln of the combined pyrolysis incinerator through a second belt conveyor with a sealed bin, indirectly heating the garbage in the rotary kiln cylinder by using high-temperature flue gas with the temperature of 200-300 ℃ in a high-temperature flue gas chamber for 0.5-2h, removing natural water and 60-80% of crystal water, sucking by using a tail exhaust fan of the rotary kiln to form micro negative pressure in the rotary kiln, discharging evaporated water vapor, discharging the water vapor out of the rotary kiln, condensing by using a condenser, collecting non-condensable gas and then feeding the gas into the vertical gasifier.

The waste after drying directly gets into in the vertical incinerator through the discharge end of rotary kiln and burns the processing, vertical incinerator upper portion is equipped with the exhanst gas outlet and links to each other with high temperature flue gas chamber, be equipped with the partition wall in the high temperature flue gas chamber, the bottom is equipped with the ash bucket, the top is equipped with alkali lye atomizer, hot flue gas passes through the partition wall bottom space in the high temperature flue gas chamber and then discharges from the exhanst gas outlet of opposite side, the bottom deposition is discharged through lock gas ash discharge valve, the exhaust flue gas is sent into the cement kiln through the high temperature exhaust fan.

The garbage incineration is required to have an incineration temperature of above 800 ℃, when the garbage heat value is insufficient or the incinerator is started, fly ash, heavy oil or fuel gas can be added into the incinerator as combustion-supporting fuel, after incineration is carried out for 0.5-2h, the incinerated garbage massive slag is crushed by a crushing mechanism at the bottom of the incinerator of a treatment room, the crushing mechanism is a tower-type furnace grate, the tower-type furnace grate is connected with a bottom transmission device through an upright column, the crushed slag is extruded by a rotating tower-type furnace grate and furnace wall iron bricks, the crushed slag is discharged out of the incinerator through a collecting hopper, wherein combustion-supporting air required by the vertical incinerator is sent to the bottom of the tower-type furnace grate through a blower and then enters the incinerator through a gap of the tower-type furnace grate. The ash obtained after incineration is sent into a cement kiln to be used as a cement raw material after metal is removed by magnetic separation and a vortex current separator again.

Third, waste liquid treatment

The landfill leachate generated in the temporary garbage storage can be directly sprayed into the cement kiln to be used as a denitration agent to replace part of ammonia water after being collected.

Sewage generated in the garbage conveying process of the discharging room and the feeding machine is collected in a sewage collecting tank and can be completely used as production water after being filtered by a permeable membrane, and a small amount of water treatment sludge obtained after treatment and garbage permeation are also sent into a cement kiln to be used as a denitration agent.

Fourth, gas treatment

The discharged gas in the unloading room and the conveying process and in the temporary garbage storage is uniformly collected and then sent into the vertical incinerator to be used as combustion-supporting gas during incineration, and the flue gas discharged after combustion is sent into the high-temperature section of a cooler of a cement kiln system and is subjected to oxidation deodorization in the cement kiln under the high-temperature and strong-alkaline environment.

The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments disclosed herein. To the utility model belongs to the field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A household garbage gasification incineration treatment system is characterized by comprising a closed pretreatment system, a combined pyrolysis incinerator, a wastewater treatment system and a waste gas treatment system;

the closed pretreatment system is sequentially provided with a discharging room, a garbage shredder and a temporary garbage storage, wherein the bottoms of the discharging room and the temporary garbage storage are provided with a penetration filter screen, and the penetration filter screen is connected with a garbage leachate pool through a pipeline;

2. The domestic waste gasification incineration processing system of claim 1, wherein the unloading room is connected with the waste temporary storage warehouse through a first conveying device, the waste temporary storage warehouse is connected with the rotary kiln feed inlet through a second conveying device, and the first conveying device and the second conveying device are respectively provided with a sealed bin.

3. The domestic waste gasification incineration processing system of claim 2, wherein the first conveyor comprises a feeder and a first belt conveyor, a feed port of the feeder is connected with a discharge pit in the discharge room, a discharge port of the feeder is connected with a feed port of the waste shredder, a discharge port of the waste shredder is connected with a feed port of the first belt conveyor, and a discharge port of the first belt conveyor is connected with a feed port of the waste temporary storage.

4. The domestic waste gasification incineration processing system of claim 3, wherein the discharge port of the waste shredder is connected to the first magnetic separation and eddy current separator, and the ash outlet of the combined pyrolysis incinerator is connected to the second magnetic separation and eddy current separator.

5. The household garbage gasification and incineration treatment system as claimed in claim 4, wherein the ash outlet of the combined pyrolysis and incineration furnace is connected with the ash storage inlet through a second magnetic separation and eddy current separator, and the ash storage inlet is provided with a dust collection device.

6. The domestic waste gasification incineration processing system of claim 2, wherein the second conveyor comprises a scale and a second belt conveyor, a feed inlet of the scale is connected with the discharge machine, a discharge outlet of the scale is connected with a feed inlet of the second belt conveyor, and a discharge outlet of the second belt conveyor is connected with a feed inlet of the rotary kiln.

7. The domestic waste gasification incineration treatment system according to claim 1, wherein the waste temporary storage is a cylindrical storage, the upper portion of the waste temporary storage is provided with a feed inlet and a gas suction port, the bottom portion of the waste temporary storage is provided with at least one discharge port, the bottom portion of the discharge port is provided with a discharge machine, and a discharge machine cover is connected with the discharge port.

8. The gasification incineration disposal system of household garbage according to claim 1, wherein the gas collecting device of the closed pretreatment system and the gas collecting device of the combined pyrolysis incinerator are connected to a deodorizing and odor eliminating device.

9. The domestic waste gasification incineration processing system of claim 1, wherein the rotary kiln is provided with steam and flue gas outlets, the steam and flue gas outlets are connected with a condenser, and an outlet of the condenser is connected with the sewage collection tank.

10. The household garbage gasification incineration treatment system according to claim 1, wherein the combined pyrolysis incinerator further comprises an air locking feeder and a crushing discharge mechanism, the air locking feeder is connected with a rotary kiln, the rotary kiln is connected with a vertical incinerator, the vertical incinerator is connected with the crushing discharge mechanism, and the high-temperature flue gas chamber is wrapped outside the rotary kiln.