CN219913066U - Household garbage incineration treatment system - Google Patents

Abstract

The utility model provides a household garbage incineration processing system, relate to waste incineration technical field, including the rubbish feeding module, the rubbish burns the module, semi-dry process reaction tower module and waste heat utilization module, the rubbish feeding module is used for carrying out the fermentation of keeping in to send into the rubbish burning module respectively with the rubbish after the fermentation, the rubbish burns the module setting in one side of rubbish feeding module, have wind-force in the rubbish burning module, the rubbish can carry out the sectional combustion in the rubbish burning module, when burning, rubbish can contact with wind-force, semi-dry process reaction tower module communicates with each other with waste heat utilization module, this scheme is through adopting 2 groups of burning ovens at the rubbish burning module, can divide the two-stage combustion to rubbish, can let rubbish obtain fully burning like this, and when burning, adopt corresponding tuyere in addition, make can let wind-force blow into in the burning oven with rubbish contact as far as possible, guarantee the fully burning of rubbish, the rubbish hot burning rate is reduced.

Description

Household garbage incineration treatment system

Technical Field

The utility model relates to the technical field of garbage incineration, in particular to a household garbage incineration treatment system.

Background

With the improvement of the living consumption level of residents, the generation amount of the household garbage is improved year by year. At present, the treatment of redundant household garbage is carried out according to national guidelines, and the household garbage is required to be reduced by adopting a garbage incineration treatment process. After the household garbage is incinerated, 3% -5% of incineration residues are generated, and the annual production amount is extremely large. The waste incineration fly ash is managed as dangerous waste, and the code of the dangerous waste is HW18;

because of the characteristics of low heat value, high moisture and high ash content of the Chinese household garbage, the household garbage with the low heat value is not fully combusted in the incinerator, and a large amount of smoke generated by the insufficient combustion of the household garbage is generated in the combustion process, so that air pollution is caused, and the heat generated by the combustion is inconvenient to convert the boiler into corresponding heat, so that the heat generated by the household garbage is not conveniently utilized fully.

Disclosure of Invention

The utility model aims to provide a household garbage incineration treatment system, so that garbage can be subjected to a stable and sufficient combustion process.

The utility model provides a household garbage incineration treatment system, which comprises a garbage feeding module, a garbage incineration module, a semi-dry reaction tower module and a waste heat utilization module, wherein the garbage feeding module comprises a main body, a main body and a main body:

the garbage feeding module is used for temporarily storing and fermenting garbage and respectively feeding the fermented garbage into the garbage incineration module;

the garbage incineration module is arranged at one side of the garbage feeding module, the garbage incineration module is internally provided with wind power, garbage can be burnt in a sectional mode in the garbage incineration module, and the garbage can be contacted with the wind power during combustion;

the semi-dry reaction tower module is communicated with the waste heat utilization module, and the semi-dry reaction tower module and the waste heat utilization module are used for reacting and utilizing high-temperature flue gas generated during combustion.

Preferably: the garbage feeding module comprises a garbage pool, a garbage crane, a garbage hopper and a propeller arranged in the garbage hopper.

Preferably: the garbage incineration module comprises a first combustion chamber of the incinerator, a pushing grate and a second combustion chamber of the incinerator, garbage in a hopper can be smoothly fed into the first combustion chamber of the incinerator by the pushing device to burn, the second combustion chamber of the incinerator is arranged at the outlet of the first combustion chamber of the incinerator, a nozzle is distributed at the inlet of the second combustion chamber of the incinerator, the nozzle comprises a secondary air nozzle and a secondary auxiliary air nozzle, the secondary air is supplied by an air supply fan, the secondary auxiliary air is taken from clean flue gas after a cloth bag, and when the secondary air and the secondary auxiliary air are blown into the second combustion chamber at a high speed, unburned combustible gas forms turbulence at the position to realize full mixed combustion, and meanwhile NOx generation is reduced.

Preferably: the garbage incineration treatment system comprises a hydraulic driving module, wherein the hydraulic driving module consists of a hydraulic oil station, an oil supply pipeline, a control valve group and a driving oil cylinder, and the hydraulic driving module is used for providing power for the garbage incineration module.

Preferably: the garbage incineration module is provided with an auxiliary combustion system for assisting combustion and a urea water spraying system which is used for the SNCR system and is used for solving the problem that the garbage incineration module cannot meet the NOx emission.

Preferably: the semi-dry reaction tower module comprises a reaction tower and an alkali liquor preparation and spraying module arranged above the reaction tower, the semi-dry reaction tower module is used for generating chemical reaction by contacting with the flue gas so as to achieve the purpose of purifying the flue gas, the alkali liquor preparation and spraying module comprises an alkali liquor preparation tank, an alkali liquor spraying pump, an alkali liquor spraying spray gun, pipelines and valves connected with all equipment, and the alkali liquor preparation and spraying module is used for providing alkali liquor used for purifying the reaction tower.

Preferably: the waste heat utilization module comprises at least 1 group of flue gas air cooler, air heat exchanger and heating heat exchanger, high-temperature flue gas exhausted from the reaction tower transfers heat to flue gas cooling air through the air heat exchanger, the hot flue gas heats the cooling air to 170 ℃, the generated hot air exchanges heat through the heating heat exchanger, water is heated to 60 ℃ through the hot air, and the water is heated to a heating user through the hot water, so that 880KW of heat can be generated for heating in a factory.

Preferably: one side of the waste heat utilization module is communicated with a cloth bag dust remover, a purification module for purifying the flue gas is arranged in front of the waste heat utilization module and the cloth bag dust remover, and after the flue gas is purified, dust in the flue gas is adsorbed by the cloth bag dust remover.

Preferably: the purification module consists of an active carbon injection system and a sodium bicarbonate injection system, and the active carbon injection system and the sodium bicarbonate injection system are used for purifying the flue gas.

Preferably: the household garbage incineration treatment system comprises a fan module, wherein the fan module consists of an induced draft fan, an air supply fan and an air supply auxiliary fan, each garbage treatment line is provided with an independent air supply fan and an air supply auxiliary fan, an induced draft fan is arranged behind the bag-type dust remover, an air suction port of the air supply fan is arranged above a garbage pool, and air in a garbage storage pit is sucked as combustion air.

The beneficial effects of the utility model are as follows:

1. according to the scheme, the garbage can be fully combusted in a two-section combustion mode, and when the garbage is combusted, the corresponding tuyere is adopted, so that wind force can be blown into the combustion furnace to be in contact with the garbage as much as possible, the garbage can be fully combusted, and the garbage burning rate is reduced.

2. According to the scheme, the pushing grate is arranged, so that the materials in the combustion layer are in a loose and inflammable state due to high-strength hearth volume heat load, and the pushing grate is adopted to act on garbage, so that the garbage is fully contacted with air, and the garbage is promoted to burn rapidly.

3. According to the scheme, the running periods of the pusher and the pusher grate are respectively set, the garbage amount of each layer can be correspondingly controlled, so that the garbage is burnt in a design point area, and the thermal burning rate of discharged slag is ensured to meet the discharge requirement.

4. This scheme is through setting up corresponding purification module and alkali lye preparation and spray module for can purify chemical substance and dust in the flue gas and filter, make after the filtration can normally discharge to the external world.

Description of the drawings:

fig. 1 is a schematic diagram of a working flow of a household garbage incineration treatment system according to the present utility model.

FIG. 2 is a schematic diagram of the working flow of the waste heat utilization module of the present utility model.

In fig. 1-2: 1-a garbage feeding module; 11-a garbage pool; 12-garbage crane; 13-a garbage hopper; 14-propeller; 2-a garbage incineration module; 21-an incinerator first combustion chamber; 22-a secondary combustion chamber of the incinerator; 23-nozzles; 3-a hydraulic drive module; a 4-semi-dry reaction tower module; 41-alkali liquor preparation and spraying modules; 5-a waste heat utilization module; 51-a flue gas air cooler; 52-an air heat exchanger; 53-heating heat exchanger; 6-a bag-type dust remover; 61-a purification module; 7-chimney.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

Example 1

As shown in fig. 1 to 2: the utility model provides a household garbage incineration treatment system, including rubbish feed module 1, rubbish burns module 2, semi-dry process reaction tower module 4 and waste heat utilization module 5, rubbish feed module 1 is used for carrying rubbish, continuously send into rubbish and burn to rubbish burns module 2, it mainly includes rubbish pond 11, rubbish crane 12 and rubbish hopper 13 and set up the propeller 14 in rubbish hopper 13, rubbish pond 11 is used for storing the rubbish that the external world sent, will be about 7 days with primary rubbish in rubbish pond 11, so that intensive mixing, fermentation, dewatering, rubbish crane 12 installs in rubbish pond 11 top, rubbish crane 12 is specifically double-beam bridge type rubbish crane 12. 14 cubic grab bucket is equipped. Under normal conditions, the garbage crane 12 charges the garbage hopper 13 in about 20 minutes per hour, carries garbage in the rest time, and stacks the garbage in a reverse manner to a preset area in sequence so as to ensure that the garbage components fed into the furnace are uniform and the combustion is stable;

example 2

Based on the embodiment 1, as shown in fig. 1: the garbage incineration module 2 is arranged on one side of the garbage feeding module 1 and mainly comprises a first combustion chamber 21 of the incinerator, a pushing grate and a second combustion chamber 22 of the incinerator, garbage in a hopper is smoothly fed into the first combustion chamber 21 of the incinerator by the aid of the pusher, the garbage is pushed into a drying layer under the action of the pusher, the dried garbage enters the combustion layer, the garbage is mixed with oxygen in the combustion layer for combustion, the garbage finally reaches the combustion layer along with the action of the pushing grate, after the combustion layer is cooled, slag falls into an external slag extractor, the action times of the pushing grate are determined according to a preset mode, and the automatic combustion control system automatically controls and adjusts the garbage according to combustion conditions. The operation can be manually regulated according to a certain set value according to the fluctuation of the combustion condition in the incinerator, the incinerator body is composed of an incinerator wall, and the incinerator wall is fixed on a steel structure frame and adopts an airtight structure which is completely isolated from external air. The furnace wall adopts structures such as a wear-resistant furnace wall, a fire-resistant furnace wall and the like which are adaptive according to different temperature areas;

the second combustion chamber 22 of the incinerator is arranged at the outlet of the first combustion chamber 21 of the incinerator, the inlet of the second combustion chamber 22 of the incinerator is provided with a secondary air nozzle and a secondary auxiliary air nozzle, the secondary air is supplied by an air supply fan, the secondary auxiliary air is taken from clean smoke after a cloth bag, and when the secondary air and the secondary auxiliary air are blown into the second combustion chamber at a high speed, unburned combustible gas forms turbulence at the position, so that full mixed combustion is realized, and meanwhile, the generation of NOx is reduced.

Example 3

Based on the embodiment 1 or 2, as shown in fig. 1: the garbage incineration treatment system comprises a hydraulic driving module 3, a hydraulic control device and a hydraulic control device, wherein the hydraulic control module 3 comprises a hydraulic oil station, an oil supply pipeline, a control valve group and a driving oil cylinder, and each incinerator is provided with a set of hydraulic driving device and is used for providing power for the actions of a garbage hopper 13 gate, a garbage pusher, a slag extractor and a pushing grate;

in order to prevent the oil temperature from being too high, cooling water is adopted to cool the oil, the speed in the oil cylinder is optionally and manually adjusted through a flow adjusting valve, a pipeline filter for filtering foreign matters in the oil is arranged on the oil return side, an oil cooling radiator is arranged to prevent the temperature of hydraulic oil from rising, and in addition, an oil level gauge thermometer is arranged to confirm the quantity of hydraulic oil in the oil tank and the oil temperature, so that a visual structure is adopted. In addition, when the oil level in the oil tank reaches a specified height, a liquid level switch is adopted to send out a signal through an opening and closing joint.

Example 4

On the basis of the above embodiment, as shown in fig. 1, the garbage incineration module 2 is further provided with an auxiliary combustion system for assisting combustion, and a urea water spraying system required for the SNCR system:

the auxiliary combustion system comprises ignition burners and a control panel cabinet, and each incinerator is provided with 1 ignition burner at the rear wall of the incinerator and the inlet of the secondary combustion chamber. The ignition burner is used when the furnace is started, and can simultaneously support combustion when the heat value of the garbage is too low so as to ensure full combustion; the secondary combustion chamber can be put into operation when the temperature of the secondary combustion chamber is too low so as to ensure that the outlet temperature of the secondary combustion chamber meets the specified requirement. The fuel used by the ignition burner is light diesel oil. The burner provides necessary combustion air through the special fan from taking to guarantee that the gas burns completely in the combustion chamber, ignition combustion system is equipped with on-the-spot switch board and medium adjusting device in addition, is equipped with the failure signal of equipment on the on-the-spot switch board, and the burner can remote operation, and the flow control of last burner can go on in the master control room. When the burner is not used, the burner exits the hearth;

urea water spray system: comprises a urea solution preparation tank, a urea solution injection pump, a urea solution nozzle and the like. The urea water spraying pump provides urea water for the garbage incineration line, and finally the urea water is sprayed into the furnace through the urea water nozzle, when special conditions cannot meet the NOx emission, the urea water spraying system can be started to operate, in addition, the urea water spraying system uses urea water with the concentration of 3% as an absorbent, and the spraying position of the absorbent is the area from 900 ℃ to 1050 ℃ of the secondary combustion chamber.

Example 5

On the basis of the above embodiment, as shown in fig. 1, the semi-dry reaction tower module 4 is communicated with one side of the garbage incineration module 2, and mainly comprises a reaction tower and an alkali liquor preparation and spraying module 41 arranged above the reaction tower, when in use, flue gas with the temperature of about 850 ℃ from the outlet of the secondary combustion chamber 22 of the incinerator enters from the top of the tower and moves downwards, the semi-dry reaction tower consists of an alkali liquor spraying spray gun and a tower body, alkali liquor contacts with the flue gas in the semi-dry reaction tower to generate chemical reaction, firstly, as the flue gas enters the tower from the top of the tower body, the flue gas enters the tower through a flue gas inlet at the top of the tower, the spray gun atomizes the alkali liquor, covers the whole section, enables the atomized alkali liquor to fully contact with the flue gas, carries out heat and mass transfer and chemical neutralization reaction with HCI, HF, SO2 in the tower, then the flue gas is discharged from a discharge flue, and part of particles and reaction residues are discharged from the bottom.

Example 6

Based on the above embodiment, as shown in fig. 1, the lye preparation and spraying module 41: comprises an alkali liquor preparation tank, an alkali liquor spray pump, an alkali liquor spray gun, a pipeline for connecting each device, a valve and cleaning measures, wherein the caustic soda flakes are transported into a factory by a vehicle and stored in a caustic soda flakes storage area. In preparation, caustic soda flakes are added to the preparation tank and a proper amount of demineralized water is added. During deacidification operation, the alkali liquor spray pump is fed, and is sprayed into the deacidification tower through the alkali liquor spray gun, and in addition, the main component of the alkali liquor adopts calcium hydroxide.

Example 7

On the basis of the above embodiment, as shown in fig. 1 and 2, one side of the alkali liquor preparation and spraying module 41 is provided with a waste heat utilization module 5 in communication, the waste heat utilization module 5 comprises at least 1 group of flue gas air cooler 51, air heat exchanger 52 and heating heat exchanger 53, high temperature flue gas discharged from the reaction tower transfers heat to flue gas cooling air through the air heat exchanger 52, the hot flue gas heats the cooling air to about 170 ℃, the generated hot air exchanges heat through the heating heat exchanger 53, the water is heated to about 60 ℃ by the hot air, and finally, the heating is confirmed by the design institute heating expert, and the heating user is heated by hot water. Approximately 880KW of heat can be generated for heating the plant area.

Example 8

On the basis of the above embodiment, as shown in fig. 1, a bag-type dust collector 6 is connected to one side of the waste heat utilization module 5, a purification module 61 for purifying flue gas is arranged before the waste heat utilization module 5 and the bag-type dust collector 6, after the flue gas is purified, dust in the flue gas is adsorbed by the bag-type dust collector 6, and when the flue gas enters the bag-type dust collector 6, dust in the flue gas is adsorbed on the surface layer of the filter bag, and a dust layer is formed. The dust layer contains a large amount of unreacted sodium bicarbonate, can continuously react with harmful acid gas in the flue gas, and improves the removal rate. The purified flue gas is discharged from the upper part of the filter bag supporting plate, the dust remover adopts compressed air pulse to remove dust, the compressed air is provided by the air compression station, during normal operation, the bag dust removal is automatically controlled by using the pressure difference of the bag dust remover 6, and the dust removal working period can be set by adjusting a timer. The cloth bag filter 6 has a cloth bag filtering wind speed less than 0.8m/min, and all the above actions are controlled by DCS. In order to ensure that the temperature of the flue gas entering the dust remover can be within the design range, a temperature monitor is arranged on an outlet flue of the semi-dry reaction tower at the inlet of the dust remover.

Example 8

On the basis of the above embodiment, as shown in fig. 1, the purification module 61 includes a system composed of an activated carbon injection system and a sodium bicarbonate dry injection system:

wherein the activated carbon injection system: comprises an active carbon storage bin, an active carbon quantitative feeder, an active carbon spray head, a fan for providing power, and slaked lime spraying. The flue gas pipeline before the dust remover is sprayed with active carbon for adsorbing heavy metals and dioxin, ensuring the standard emission of heavy metals and dioxin, and the purpose of the active carbon spraying is to adsorb heavy metal aerosols and particles such as dioxin, hg and the like in the flue gas. Spraying a sufficient amount of activated carbon is effective to reduce the concentration of dioxin/furan. The activated carbon flows out from the bin bottom and falls into the activated carbon injection pipe through the doser, and then the activated carbon powder is blown into the flue through the Roots blower. The activated carbon nozzle is connected into the flue gas pipeline, and the activated carbon nozzle is dispersed in the flue gas by means of the flow of the flue gas. Finally, the activated carbon is uniformly adsorbed on a filter bag of the bag-type dust collector 6, heavy metals such as Hg and the like in the flue gas are continuously adsorbed, and fall into an ash bucket along with the ash removal of the bag-type dust collector 6, and are discharged along with fine ash.

Sodium bicarbonate dry injection system: comprises a sodium bicarbonate warehouse 1, a sodium bicarbonate dry feeding device, a sodium bicarbonate dry blower and a sodium bicarbonate spray head which are shared with an active carbon spray head, and sodium bicarbonate powder is sprayed into a flue gas pipeline as an absorbent to absorb acid gas. The sodium bicarbonate after adsorption of the impurities was collected in a bag filter.

HCl+NaOH NaCL+H2O

SO2+NaOH+1/2O2 Na2SO4+H2O

Sodium bicarbonate is about 200 meshes, does not need to be crushed, and can be directly sprayed into a flue. When sodium bicarbonate powder is sprayed into the flue, the rotating speed of the feeder can be set on the DCS, and the quantity of slaked lime supplied to the flue gas can be regulated through the change of the rotating speed of the feeder. The materials in the sodium bicarbonate warehouse are discharged through a sodium bicarbonate quantitative feeder, then sodium bicarbonate is blown into a flue in front of the bag-type dust remover 6 by the sodium bicarbonate jet fan and active carbon, and sodium bicarbonate powder is attached to the surface of a filter bag after entering the dust remover, so that the double purposes of deacidifying and protecting the dust remover can be achieved.

Example 9

On the basis of the embodiment, as shown in fig. 1, the household garbage incineration treatment system comprises a fan module, wherein the fan module consists of a draught fan, an air supply fan and an air supply auxiliary fan, and each garbage treatment line is provided with an independent air supply fan and an independent air supply auxiliary fan;

in use, the air supply blower supplies primary and secondary air for combustion, which is heated by the air heat exchanger 52 and fed into the primary combustion chamber 21 of the incinerator and through the secondary air nozzle into the secondary combustion chamber 22 of the incinerator. The air supply auxiliary fan provides partial secondary air required by combustion, purified flue gas is extracted from a pipeline behind the bag-type dust collector 6, and enters a secondary combustion chamber through a secondary air nozzle;

in addition, the air suction port of the air supply fan is arranged above the garbage pool 11, and the air in the garbage pool is sucked as combustion air, so that the garbage pool is kept in a negative pressure state, and odor leakage is avoided. The auxiliary air is taken from clean flue gas at the rear part of the cloth bag, and is blown into the secondary combustion chamber at high speed to enhance the mixing of oxygen and combustible gas;

each garbage incineration treatment line is provided with an induced draft fan behind the bag-type dust collector 6, and when the garbage incineration treatment line is used, the induced draft fan can overcome flue resistance, equipment resistance such as an economizer, chimney 7 resistance and the like. The induced draft fan adopts variable frequency control, and the frequency of the induced draft fan is automatically adjusted according to the pressure in the incinerator.

Example 10

On the basis of the above embodiment, as shown in fig. 1, a chimney 7 for exhausting smoke is provided on one side of the fan module, and the purified smoke is exhausted to the atmosphere through the chimney 7 by an induced draft fan, and the height of the chimney 7 is 45m. The chimney 7 adopts a self-operated steel chimney 7, the chimney 7 is structurally divided into an inner layer cylinder body and an outer layer cylinder body, heat preservation cotton is filled in an interlayer, and the inner cylinder is made of titanium-stainless steel anti-corrosion materials. The bottom of the chimney 7 is provided with a condensed water drain pipe and a drain valve. The particulate CEMS is arranged at the position of 4 times of flue diameter from the downstream direction of the elbow, the valve and the reducing pipe and 2 times of flue diameter from the upstream direction of the components; the gaseous contaminant CEMS is arranged at a position 2 times the diameter of the flue in the downstream direction of the elbow, the valve and the reducing pipe and at a position 0.5 times the diameter of the flue in the upstream direction of the components. And an overhaul platform is arranged below the measuring point, the platform guard rail is not lower than 1.2 meters, and the platform width is not lower than 1.5 meters. The top end of the chimney 7 is provided with a lightning rod, and the bottom is provided with a lightning guiding device. The design standard of the sampling port and the sampling platform is according to the relevant regulation of 7.1.1.7 in the technical specification of continuous monitoring of the emission of fixed pollution source flue gas SO2, NOx and particulate matters, namely 7.1.1.7 in HJ75-2017, the sampling platform and the sampling hole are reasonably arranged.

Example 11

On the basis of the above embodiment, as shown in fig. 1, the garbage incineration module 2 is provided with a slag treatment system for receiving slag or furnace ash, the slag treatment system comprises a furnace ash leakage conveyor, a slag extractor, a belt conveyor and an ash pond, and the slag treatment system is mainly used for treating slag or bottom ash generated by the incinerator during operation;

when in use, the ash leakage between the gaps of the pushing grate is used as a primary air chamber, an ash leakage and ash discharge valve, a furnace ash leakage conveyor, a slag extractor and a belt conveyor to an ash pond through the ash hopper of the pushing grate, and is sent to a recycling project.

Slag discharged from the rear part of the furnace body is discharged to a slag extractor through a slag falling chute slag falling well. The incinerator is provided with a slag extractor, a water seal type hydraulic ash discharging device is adopted, the sealing in the incinerator is ensured by adopting a water seal mode, and slag can be sufficiently cooled in water so as to be convenient for mechanized conveying. The reciprocating hydraulic pushing plate compresses and drags out the water-cooled slag, so that the slag contains only a small amount of water. And a belt conveyor is arranged behind the slag extractor, and slag is directly discharged to an ash pond.

Example 12

On the basis of the above embodiment, as shown in fig. 1, the bag-type dust collector 6 is provided with a fly ash treatment module, a fly ash conveying system and a fly ash stabilizing system, wherein the fly ash conveying system consists of a conveyor and a metering and weighing device, and the fly ash is from flue gas dust collected by the bag-type dust collector and fly ash collected under a semi-dry deacidification tower, and the main components of the fly ash are NaCl and SiO ₂ .CaO、ALO3、Fe ₂ O3, etc. In addition, there is a small amountHg, pb, cr, cd, mn, zn, and a trace amount of a toxic organic substance such as dioxin. Conveying the sodium bicarbonate, activated carbon and other impurities which are not completely reacted to a fly ash metering device through a conveyor, weighing and metering, and then performing stable solidification;

the fly ash stabilizing system consists of mixing mill, and is one apparatus for stabilizing heavy metals in fly ash collected from cloth bag dust collector 6 with liquid chelating agent and cement, and the fly ash stabilizing system has all the equipment capable of being operated automatically and continuously via in-situ control disc and the equipment may be operated manually in-situ separately. Because the overall scale of the project is smaller, in order to prevent CaCl2 in the fly ash from deliquescing, the project is not provided with a separate fly ash storage bin, the fly ash metering device takes account of the middle fly ash storage bin, and the fly ash of the fly ash metering device falls into the mixing mill to be stabilized after weighing. At the same time, the water and the chelating agent are mixed and diluted and then supplied to the mixing mill. The addition amounts of the chelating agent, the cement and the humidifying water are respectively close to 2%, 2% and 25% of the weight of the fly ash, and the proper proportion is determined according to the type of the curing agent. Heavy metals in the fly ash react with the chelating agent to generate water-insoluble substances to be stabilized, and a fly ash storage bin is arranged in consideration of the safety and stability of a fly ash stabilizing system, the volume of the fly ash storage bin is stored for at least 3 days, and the stabilized fly ash is sent to an ash landfill for landfill.

Claims (10)

1. A household garbage incineration treatment system is characterized in that: comprises a garbage feeding module (1), a garbage incineration module (2), a semi-dry reaction tower module (4) and a waste heat utilization module (5):

the garbage feeding module (1) is used for carrying out temporary storage fermentation on garbage and respectively sending the fermented garbage into the garbage incineration module (2);

the garbage incineration module (2) is arranged on one side of the garbage feeding module (1), wind power is arranged in the garbage incineration module (2), garbage can be burnt in a sectional mode in the garbage incineration module (2), and the garbage can be contacted with the wind power during combustion;

the semi-dry reaction tower module (4) is communicated with the waste heat utilization module (5), and the semi-dry reaction tower module (4) and the waste heat utilization module (5) are used for reacting and utilizing high-temperature flue gas generated during combustion.

2. A household garbage incineration disposal system according to claim 1, characterised in that: the garbage feeding module (1) comprises a garbage pool (11), a garbage crane (12), a garbage hopper (13) and a propeller (14) arranged in the garbage hopper (13).

3. A household garbage incineration disposal system according to claim 1, characterised in that: the garbage incineration module (2) comprises an incinerator first combustion chamber (21), a pushing grate and an incinerator second combustion chamber (22), garbage in a hopper can be smoothly fed into the incinerator first combustion chamber (21) by the aid of the pushing device to be combusted, the incinerator second combustion chamber (22) is arranged at the outlet of the incinerator first combustion chamber (21), the inlet of the incinerator second combustion chamber (22) is provided with a nozzle, the nozzle comprises a secondary air nozzle and a secondary auxiliary air nozzle, the secondary air is supplied by the air supply fan, the secondary auxiliary air is taken from clean flue gas after a cloth bag, and when the secondary air and the secondary auxiliary air are blown into the incinerator second combustion chamber (22) at a high speed, unburned combustible gas forms turbulence at the place to realize full mixed combustion, and meanwhile NOx generation is reduced.

4. A household garbage incineration disposal system according to claim 1, characterised in that: the garbage incineration treatment system comprises a hydraulic driving module (3), wherein the hydraulic driving module (3) consists of a hydraulic oil station, an oil supply pipeline, a control valve group and a driving oil cylinder, and the hydraulic driving module (3) is used for providing power for the garbage incineration module (2).

5. A household garbage incineration disposal system according to claim 1, characterised in that: the garbage incineration module (2) is provided with an auxiliary combustion system for assisting combustion and a urea water spraying system which is used for an SNCR system, and the urea water spraying system is used for solving the problem that the garbage incineration module (2) cannot meet NOx emission.

6. A household garbage incineration disposal system according to claim 1, characterised in that: the semi-dry reaction tower module (4) comprises a reaction tower and an alkali liquor preparation and spraying module (41) arranged above the reaction tower, the semi-dry reaction tower module (4) is used for generating chemical reaction with flue gas so as to achieve the purpose of purifying the flue gas, the alkali liquor preparation and spraying module (41) comprises an alkali liquor preparation tank, an alkali liquor spraying pump, an alkali liquor spraying spray gun, and pipelines and valves connected with all devices, and the alkali liquor preparation and spraying module (41) is used for providing alkali liquor used in purification for the reaction tower.

7. A household garbage incineration disposal system according to claim 1, characterised in that: the waste heat utilization module (5) comprises at least 1 group of flue gas air cooler (51), an air heat exchanger (52) and a heating heat exchanger (53), high-temperature flue gas exhausted from the reaction tower is used for transferring heat into flue gas cooling air through the air heat exchanger (52), the cooling air is heated to 170 ℃ by hot flue gas, the generated hot air is subjected to heat exchange through the heating heat exchanger (53), water is heated to 60 ℃ by hot air, heating users are supplied with heat through hot water, and 880KW of heat can be generated for plant heating.

8. A household garbage incineration disposal system according to claim 1, characterised in that: one side of the waste heat utilization module (5) is communicated with a cloth bag dust collector (6), a purification module (61) for purifying flue gas is arranged in front of the waste heat utilization module (5) and the cloth bag dust collector (6), and after flue gas is purified, dust in the flue gas is adsorbed by the cloth bag dust collector (6).

9. A household garbage incineration disposal system according to claim 8, characterised in that: the purification module (61) is composed of an activated carbon injection system and a sodium bicarbonate injection system, and the activated carbon injection system and the sodium bicarbonate injection system are used for purifying flue gas.

10. A household garbage incineration disposal system according to claim 1, characterised in that: the household garbage incineration treatment system comprises a fan module, wherein the fan module consists of an induced draft fan, an air supply fan and an air supply auxiliary fan, each garbage treatment line is provided with an independent air supply fan and an air supply auxiliary fan, the induced draft fan is arranged behind the bag-type dust remover (6), an air suction port of the air supply fan is arranged above the garbage pool (11), and air in the garbage storage pit is sucked as combustion air.