CN219318445U - Positive pressure garbage incinerator with movable grate and secondary combustion chamber - Google Patents

Abstract

The utility model relates to a positive pressure garbage incinerator with a movable grate and a secondary combustion chamber, which comprises: the incinerator comprises a incinerator body, a wet garbage feeding bin, a dry garbage feeding bin, a pushing device, a water pipe type furnace bridge, a water tank, a secondary combustion chamber, a movable grate, a slag conveyor and a blower; the waste incineration under the positive pressure condition is adopted, so that the penetrating power of oxygen, heat radiation and heat transfer can be improved, the waste incineration speed is increased, and the heat efficiency is high; the other dry garbage and the kitchen wet garbage which are classified by communities can be respectively burned to ashes in the same incinerator through the respective charging ports, and the limitation that the traditional garbage incinerator can only burn the other dry garbage with low water content is overcome.

Description

Positive pressure garbage incinerator with movable grate and secondary combustion chamber

Technical Field

The utility model relates to a garbage incinerator, in particular to a positive pressure garbage incinerator which is provided with a movable grate for drying wet garbage and deslagging, a secondary combustion chamber and a steam hot water generating heater, and belongs to the field of environmental protection equipment;

background

Generally, the heat value of the well-classified community dry garbage is 2100-3300 large calorie/kg, compared with the heat value of the unclassified mixed garbage, the heat value of the dry garbage is 1200-1600 large calorie/kg, the heat value of the dry garbage is greatly improved compared with the heat value of the mixed garbage, the dry garbage can be well burnt in a hearth, high temperature is generated, and a large amount of heat is emitted; the classified kitchen wet garbage contains plastic packaging bags, melon peel and kitchen residues, has low heat value, can be fermented and degraded or dried, dehydrated and reused after heat is improved, and the classified dry garbage can be subjected to incineration reduction recycling treatment; in CN202224433U, a comprehensive treatment and utilization method for garbage capable of effectively suppressing dioxin, garbage is separated, dried and stored, and then enters a pyrolysis gasification furnace for treatment, the separated heavy kitchen wet garbage below the sieve is used as raw materials for brick burning for recycling, so that the equipment investment and occupied area of wet garbage treatment are increased, the separated light garbage needs hot air for drying and dehydration, and then enters a pyrolysis gasification furnace for treatment, so that the equipment investment, running cost and occupied area for drying the garbage are increased; in CN109812814A, a garbage incineration improved process, garbage is separated and treated to obtain perishable organic matters and combustion matters; the combustion materials are used for the incineration of the incinerator to generate electricity, and aerobic microorganisms are adopted to degrade perishable organic matters, however, the perishable organic matters after garbage sorting or kitchen garbage contain a plurality of plastic packages and impurities which cannot be fermented, so that the fermentation of the organic matters is not facilitated, the fermentation time is long, the occupied area is large, the fertilizer efficiency of the fermentation products is low, the commercial value is low, and the operation cost is high; the conventional large-scale waste incineration power generation of more than 500 tons/day belongs to the incineration of mixed waste, the mixed waste has high water content, high humidity and low heat value, the waste is insufficiently incinerated in a hearth, the hearth temperature is low, the incineration is incomplete, fuel oil needs to be sprayed in a secondary combustion chamber to supplement heat to raise the temperature to 850-1000 ℃ to burn dioxin, carbon monoxide and organic volatile matters in decomposed flue gas, and the energy consumption cost of the waste incineration is greatly increased.

Disclosure of Invention

The utility model aims to overcome and make up the defects and the shortcomings of the prior art, thereby providing a positive pressure garbage incinerator which is used for directly incinerating other dry garbage and kitchen wet garbage after household garbage classification of armies, schools, institutions, street communities and villages in the same incinerator through respective charging ports respectively, and incinerating the kitchen wet garbage after being heated, dehydrated and dried on a movable grate of the incinerator;

the utility model relates to a positive pressure garbage incinerator with a movable grate and a secondary combustion chamber, which is realized in the following way:

a positive pressure garbage incinerator with a moving grate and a secondary combustion chamber, comprising: the incinerator comprises a incinerator body, a wet garbage feeding bin, a dry garbage feeding bin, a pushing device, a water pipe type furnace bridge, a water tank, a secondary combustion chamber, a movable grate, a slag conveyor and a blower;

the lower flue gas outlet of the incinerator body is communicated with the air inlet of the secondary combustion chamber through a flange connection, the bottom of the incinerator body is arranged in the middle of the top of the movable grate shell and is communicated with the slag discharging port of the slag conveyor, the feeding port at one end of the movable grate shell is communicated with the discharging port of the wet garbage feeding bin, the upper part of the wet garbage feeding bin is provided with a gate valve III, the lower part of the wet garbage feeding bin is provided with a gate valve IV, the air outlet of the air blower is communicated with the air inlet of the shell of the secondary combustion chamber through a pipeline and a valve I, and the air outlet of the air blower is communicated with the air inlet of the air bin through a pipeline and a valve II; a dry garbage adding bin is arranged at the top of a furnace body of the incinerator, a first gate valve is arranged at the top of the dry garbage adding bin, a second gate valve is arranged at the bottom of the dry garbage adding bin, and a garbage combustion buffer area in the furnace body is arranged below the second gate valve; the water tank is communicated with a water jacket arranged on the upper shell of the incinerator body through a second pipeline;

the furnace body of the incinerator belongs to a cylindrical shell made of metal, a layer of refractory heat-insulating material is built on the inner wall of the lower part of the furnace body of the incinerator, a water jacket is arranged on the outer shell of the upper part of the furnace body of the incinerator, a pushing plate of a pushing device is arranged in the middle lower part of the furnace body of the incinerator in the horizontal direction, a water pipe type furnace bridge is arranged on the lower part of the pushing plate, the water pipe type furnace bridge is connected and communicated with the water jacket through a water pipe, a flue gas outlet of the furnace body is arranged on the side surface of the furnace body of the lower part of the water pipe type furnace bridge, an air bin is arranged on the outer layer of the lower part of the furnace body of the incinerator, the furnace body of the incinerator is an incineration high temperature area, a plurality of air inlets I which are connected and communicated are arranged between the incineration high temperature area and the air bin, and a gas outlet of the upper part of the furnace body of the incinerator is communicated with a gas inlet of the lower part of the furnace body of the incinerator through a pipeline I;

the movable fire grate comprises a reciprocating fire grate or a chain fire grate, and is driven by a motor or a hydraulic motor, the fire grate shell belongs to a sealed cuboid made of metal materials, and the movable fire grate is arranged in the fire grate shell;

the slag conveyor comprises a scraper slag extractor, a spiral slag extractor and a crawler conveyor;

the pushing device belongs to a conventional electric telescopic screw rod pushing machine and comprises an electric screw rod pushing machine control device and a pushing plate, wherein the pushing plate is fixed at the top end of a telescopic rod of the screw rod pushing machine, the other end of the screw rod is connected with the screw rod pushing machine control device, when a motor is started, the screw rod of the screw rod pushing machine rotates, the screw rod stretches into the furnace body from the outside of the furnace body when rotating clockwise, and the pushing plate pushes garbage in a garbage incineration buffer area to the middle of the furnace body so as to prevent the garbage from being burnt in an incineration high-temperature area which does not fall down into the garbage after being heated, coked and formed together; when the screw rod is reversed, the screw rod is retracted from the furnace body;

the secondary combustion chamber is formed by a steel pipe and refractory materials, a layer of refractory materials is built on the inner wall of the steel pipe for heat preservation, a secondary combustion chamber shell is arranged on the outer layer of the steel pipe, a second air inlet is arranged on the shell, and a plurality of second air inlets which are connected and communicated are arranged between the inside of the steel pipe and an air duct of the secondary combustion chamber;

the wind bin belongs to a wind cache area or a wind inlet box body;

the water tank belongs to a conventional boiler water inlet or water supplementing tank, and is internally provided with a water level controller and a sight glass;

in the utility model, the high-heat value 'other dry garbage' and the low-heat value 'kitchen wet garbage' after community classification are added into a garbage incinerator through respective charging ports; wherein, the heat value of the other dry garbage with high heat value is high, can fully burn in a high-temperature area of garbage incineration in the incinerator body and generate a large amount of heat; the kitchen wet garbage is dehydrated and dried after the heat released by the incineration of other dry garbage is absorbed on the movable grate, so that the wet garbage is changed into dry garbage, the heat value of the garbage is greatly improved, and the dry garbage is conveyed to a garbage incineration high-temperature area of a furnace body of the incinerator along with the movement of the movable grate to be incinerated to be ashed at high temperature, which is one of the main characteristics of the utility model.

In the utility model, the 'other dry garbage' in the shell of the garbage incinerator is influenced by high-temperature heat radiation and heat transfer in a high-temperature region of the garbage incinerator, the moisture in the 'other dry garbage' is continuously evaporated into water vapor, the heat value of the 'other dry garbage' is greatly increased, higher temperature is generated during incineration, waste plastics and rubber wastes are heated and cracked and become hydrocarbon tar gas phase matters, the water vapor and the tar gas phase matters are decompressed through a vent pipe or returned to the high-temperature region of the garbage incinerator at low pressure for incineration, the water vapor reacts with water gas in the high-temperature region of the incineration, combustible hydrogen and carbon monoxide with increased heat value are generated, the combustion temperature of the incinerator is increased, and the tar gas phase matters are combusted in the high-temperature region of the garbage incineration, so that the tar emission in smoke is reduced; meanwhile, the heat utilization rate of the garbage incineration is improved by the incineration of the tar, and the combustion temperature of a high-temperature region of the garbage incineration reaches 850-1100 ℃; this is one of the main features of the present utility model.

In the traditional garbage drying, crushed broken garbage is conveyed into a rotary drying cylinder, electric hot air or hot air of an oil burning furnace is conveyed into the rotary drying cylinder, and the garbage is dehydrated and dried after heat transfer occurs due to direct contact of the garbage and the hot air; this increases the electricity consumption cost or the fuel consumption cost of the hot air generation, and also increases the investment and the occupied area of the drying equipment; the utility model overcomes the defects, utilizes the heat released by the incineration of other dry wastes to dehydrate and dry kitchen wet wastes in the same incinerator to become dry wastes and burn the dry wastes to ashes, has high heat utilization rate of the waste incineration, and saves the electric heating or fuel cost which is required to be consumed for drying and dehydrating the wet wastes; this is one of the main features of the present utility model;

the working principle of the utility model is as follows:

firstly, opening an upper gate valve of a dry garbage adding bin at the top of a garbage incinerator, closing a lower gate valve of the dry garbage adding bin, adding other dry garbage (hereinafter referred to as dry garbage) with high heat value classified by communities into the dry garbage adding bin through a lifting conveyor, closing the upper gate valve of the dry garbage adding bin, opening the lower gate valve of the dry garbage adding bin, enabling the dry garbage to fall down above a water pipe type furnace bridge in the incinerator, then closing the lower gate valve of the dry garbage adding bin, opening the upper gate valve of the dry garbage adding bin, adding other dry garbage (hereinafter referred to as dry garbage) with high heat value classified by communities into the dry garbage adding bin through the lifting conveyor, closing the upper gate valve of the dry garbage adding bin, when the dry garbage is required to be added into a furnace body of the garbage incinerator, opening the lower gate valve of the dry garbage adding bin, enabling the dry garbage to fall down into the furnace body of the incinerator, and circularly incinerating the other dry garbage classified by communities into the furnace body of the garbage incinerator in the manner; under the pressurization of air conveyed by a blower, dry garbage is subjected to positive pressure incineration (the pressure in the incinerator is controlled at 3000-5000 Pa) in a high-temperature area in the incinerator, a large amount of heat is released during dry garbage incineration, the incineration temperature reaches 900-1100 ℃, open fire smoke generated by incineration is discharged into a secondary combustion chamber from a smoke outlet, oxidation-reduction reaction of further combustion is carried out on the air sent by the blower, dioxin, carbon monoxide and organic waste gas in the smoke in the secondary combustion chamber, and the high-temperature smoke discharged from the secondary combustion chamber is subjected to conventional smoke heat recovery and smoke purification standard reaching treatment, and then the standard reaching smoke is discharged to the environment through a chimney; opening a gate valve III at the upper part of a wet garbage adding bin, closing a gate valve IV at the lower part of the wet garbage adding bin, adding low-heat value kitchen wet garbage (hereinafter referred to as wet garbage) classified by communities into the wet garbage adding bin through a lifting conveyor, closing the gate valve III at the upper part of the wet garbage adding bin, opening the gate valve IV at the lower part of the wet garbage adding bin, enabling the wet garbage to fall down onto a movable grate from the wet garbage adding bin, closing the gate valve IV at the lower part of the wet garbage adding bin, opening the gate valve III at the upper part of the wet garbage adding bin through the lifting conveyor, closing the gate valve IV at the upper part of the wet garbage adding bin, opening the gate valve IV at the lower part of the wet garbage adding bin when the wet garbage is required to be added onto the movable grate, circularly adopting the above mode to add the wet garbage onto the movable grate for drying and dewatering to become dry garbage, and then burning; the wet garbage on the movable grate is subjected to the action of heat radiation and heat transfer of a high-temperature region of garbage incineration, moisture in the wet garbage is evaporated, the wet garbage is dried to become dry garbage, the dry garbage is incinerated to ashes along with the movement of the movable grate to the high-temperature region of garbage incineration at the lower part of the incinerator, ashes or slag generated in the high-temperature region of garbage incineration are conveyed into a slag collecting tank along with the movement of the movable grate, and the ashes or slag are discharged out of the garbage incinerator through a slag conveyor;

a water pipe type furnace bridge is arranged in the incinerator, water in a water pipe becomes hot water or becomes steam after the furnace bridge is heated, and the water is brought along with heat of the outer wall of the water pipe so as to prevent the furnace bridge from being bent due to thermal deformation after being heated, and simultaneously, resource utilization of hot water and steam generated by garbage incineration is implemented;

the method comprises the steps that water vapor and tar gas are generated in the upper part of the garbage incinerator after garbage is heated, the pressure of the upper part of the incinerator is increased, a safety accident with exceeding pressure occurs, the water vapor and the tar gas are decompressed through a vent pipe or returned to the lower part of the garbage incinerator with low pressure, the water vapor is introduced into a high-temperature area of the garbage incinerator to generate water gas reaction, combustible hydrogen and carbon monoxide with increased heat value are generated, and the combustion temperature of the incinerator is increased; the tar gas generated by the incinerator is introduced into a high-temperature area of garbage incineration for combustion, so that the tar emission in the flue gas is reduced; meanwhile, the burning of tar also improves the heat utilization rate of garbage burning;

when the garbage burns in the incinerator, the phenomenon that the garbage is heated into mounds and agglomerations occurs, so that the garbage cannot naturally fall onto a water pipe type furnace bridge to be normally incinerated, and an electric spiral pushing device is adopted to push and loosen the garbage heated into mounds and agglomerations in the incinerator, so that the garbage falls into the water pipe type furnace bridge to be normally incinerated;

a fire observation camera probe is arranged on the garbage incinerator, so that the air inlet quantity of the blower can be conveniently operated, and the temperature of the incinerator and the condition that garbage is incinerated to be ashed can be conveniently achieved;

the upper gate valve and the lower gate valve of the dry garbage adding bin and the wet garbage adding bin are alternately opened or closed, so that the pollution to the environment caused by overflow of water vapor and tar gas phase matters in the garbage incinerator from the incinerator when garbage raw materials are added to the garbage incinerator can be effectively prevented, and the continuous normal operation of the garbage incinerator can be ensured not to be influenced when the garbage raw materials are added.

The positive pressure (3000-5000 pa) of the blower is adopted to convey air into the incinerator, only one pressure-relieved smoke outlet is arranged in the incinerator body and the movable grate shell, and the wet garbage feeding bin and the dry garbage feeding bin are discharged under the condition of tightness; the waste incineration under the positive pressure condition can improve the penetrating power of oxygen, heat radiation and heat transfer, and increase the oxygen pressure to enter deep inside the waste for combustion, so that the incineration temperature of a high-temperature area of the waste incineration is high, and the waste incineration speed is high; simultaneously, the flue gas with open flame is sprayed out from a flue gas outlet at the lower part of the incinerator body and then enters the secondary combustion chamber;

the utility model has the advantages that:

1. the high-temperature heat generated by incinerating the high-heat value other dry garbage is supplied to the heat required by drying and dehydrating the low-heat value kitchen wet garbage, so that the heat efficiency of garbage incineration is fully utilized, and the defect of high energy consumption of hot air drying garbage generated by conventional garbage drying through electric heating or fuel oil incineration is overcome;

2. the garbage incinerator can directly incinerate other dry garbage and kitchen wet garbage classified by communities into ashes in the same incinerator through respective charging ports, and the limitation that the traditional garbage incinerator can only incinerate other dry garbage is overcome;

3. the kitchen wet garbage classified by communities has low heat value and high water content, cannot be incinerated, is subjected to reduction treatment of fermentation after crushing, extrusion and dehydration, and needs additional equipment for fermentation, and hot air or heat conducting oil is required for fermentation to heat to maintain the fermentation temperature, so that the treatment cost and the equipment floor area of the kitchen wet garbage are increased, and the garbage incinerator can completely incinerate other dry garbage and the kitchen wet garbage into ashes in the same garbage incinerator, so that the equipment investment and the operation cost of harmless and reduction treatment of the community household garbage are reduced;

4. the utility model adopts the waste incineration under the positive pressure condition, can improve the penetrating power of oxygen, heat radiation and heat transfer, and increases the oxygen pressure to enter the deep inside the waste for combustion, so that the incineration temperature of a high-temperature area of the waste incineration is high, the waste incineration speed is high, and the thermal efficiency of the waste incineration is high;

drawings

FIG. 1 is a schematic view of a positive pressure garbage incinerator with a moving grate and a secondary combustion chamber according to the present utility model;

FIG. 2 is a cross-sectional top view of a lower furnace body structure C-C of the incinerator of the present utility model;

FIG. 3 is a cross-sectional top view of a mid-furnace body structure A-A of the incinerator of the present utility model;

FIG. 4 is a cross-sectional top view of the upper structure B-B of the traveling grate housing of the present utility model;

FIG. 5 is a cross-sectional top view of a secondary combustion chamber structure D-D of the present utility model;

FIG. 6 is a cross-sectional top view of the above structure E-E of the traveling grate of the present utility model;

in the above-mentioned figures 1, 2, 3, 4, 5 and 6, 1-gate valve I, 2-dry garbage charging bin, 3-gate valve II, 4-gas outlet, 5-incinerator body, 6-steam outlet, 7-incineration high temperature zone, 8-water level controller, 9-water tank, 10-water jacket, 11-water pipe, 12-pipe I, 13-electric screw pusher control device, 14-pusher plate, 15-gas inlet, 16-water pipe type bridge, 17-refractory brick material, 18-fire-observing camera probe, 19-gate valve III, 20-wet garbage charging bin, 21-fourth, 22-air inlet, 23-blower, 24-grate housing, 25-incinerator rotary shaft cylinder, 26-movable grate, 27-air bin, 28-air inlet I, 29-valve I, 30-slag collecting tank, 31-slag conveyor, 32-air inlet II, 33-air channel of secondary combustion chamber, 34-secondary combustion chamber housing, 35-air inlet II, 36-slag outlet, 37-motor, 38-secondary combustion chamber, 39-air inlet, 45-flange, 43-flange, 45-flange, 46-fire-grate housing, and flue gas inlet, 48-flange, and 4-flange, and the fire-resistant flue gas is formed in the furnace housing;

Detailed Description

As shown in fig. 1, 2, 3, 4, 5 and 6, a positive pressure garbage incinerator with a moving grate and a secondary combustion chamber, comprising: the incinerator comprises a incinerator body (5), a wet garbage feeding bin (20), a dry garbage feeding bin (2), a pushing device, a water pipe type bridge (16), a water tank (9), a secondary combustion chamber (43), a movable grate (26), a slag conveyor (31) and a blower (23);

the lower flue gas outlet (47) of the incinerator body (5) is communicated with the air inlet of the secondary combustion chamber (43) through a flange (42), the bottom of the incinerator body (5) is arranged in the middle of the top of the movable grate shell (24) and communicated with the slag discharging port of the slag conveyor (31), the feeding port (44) at one end of the movable grate shell (24) is communicated with the discharging port of the wet garbage feeding bin (20), the gate valve III (19) is arranged at the upper part of the wet garbage feeding bin (20), the gate valve IV (21) is arranged at the lower part of the wet garbage feeding bin (20), the air outlet of the air blower (23) is communicated with the air inlet II (32) of the shell of the secondary combustion chamber (43) through a pipeline and a valve I (29), and the air outlet of the air blower (23) is communicated with the air inlet (28) of the air bin (27) through a pipeline and a valve II (40); the top of a furnace body (5) of the incinerator is arranged on a garbage feeding bin (2), a first gate valve (1) is arranged on the top of the dry garbage feeding bin (2) and a second gate valve (3) is arranged at the bottom of the dry garbage feeding bin, and a garbage combustion buffer area (46) in the furnace body (5) is arranged below the second gate valve (3); the water tank (9) is communicated with a water jacket (10) arranged on the upper shell of the incinerator body (5) through a second pipeline (45); the furnace body (5) of the incinerator belongs to a cylindrical shell made of metal, a layer of refractory heat-insulating material (17) is built on the inner wall of the lower part of the furnace body (5) of the incinerator, a water jacket (10) is arranged on the outer shell of the upper part of the furnace body (5) of the incinerator, a pushing plate (14) of a pushing device is arranged in the middle lower part of the furnace body (5) of the incinerator according to the horizontal direction, a water pipe type furnace bridge (16) is arranged on the lower part of the pushing plate (14), the water pipe type furnace bridge (16) is connected and communicated with the water jacket (10) through a water pipe (11), a flue gas outlet (47) of the furnace body is arranged on the side surface of the furnace body (5) on the lower part of the water pipe type furnace bridge (16), a wind bin (27) is arranged on the outer layer on the lower part of the furnace body (5) of the incinerator, a plurality of air inlets (22) which are connected and communicated with each other are arranged between the high temperature region (7) and the wind bin (27), and the gas outlet (4) on the upper part of the furnace body (5) of the incinerator is communicated with the gas inlet (15) of the furnace body (5) through a pipeline (12); the movable fire grate (26) comprises a reciprocating fire grate or a chain fire grate, and is driven by a motor or a hydraulic motor, the fire grate shell (24) belongs to a sealed cuboid made of metal, and the movable fire grate (26) is arranged in the fire grate shell (24); a slag conveyor (31) comprising a scraper slag extractor, a screw slag extractor and a crawler conveyor; the pushing device belongs to a conventional electric telescopic screw pushing machine and comprises an electric screw pushing machine control device (13) and a pushing plate (14), wherein the pushing plate (14) is fixed at the top end of a telescopic rod of the screw pushing machine, the other end of the screw is connected with the screw pushing machine control device (13), when a motor is started, the screw of the screw pushing machine rotates, the screw stretches into the furnace body (5) from the outside of the furnace body (5) during forward rotation, the pushing plate (14) pushes garbage in a garbage incineration buffer zone (46) to the middle of the furnace body (5) so as to prevent the garbage from being burnt into lumps by heating and then staying in an incineration high-temperature zone (7) of the garbage, which does not fall down into the furnace body (5) for incineration; when the screw rod is reversed, the screw rod is retracted from the furnace body (5); the secondary combustion chamber (43) is formed by a steel pipe and refractory materials, a layer of refractory materials (48) is built on the inner wall of the steel pipe for heat preservation, a secondary combustion chamber shell (34) is arranged on the outer layer of the steel pipe, a second air inlet (32) is arranged on the shell (34), and a plurality of second air inlets (35) which are connected and communicated are arranged between the interior of the steel pipe and an air duct (33) of the secondary combustion chamber; the wind bin belongs to a wind cache area or a wind inlet box body; the water tank belongs to a conventional boiler water inlet or water supplementing tank, and is internally provided with a water level controller and a sight glass;

when the garbage incinerator is in operation, firstly, the first gate valve (1) at the upper part of the dry garbage adding bin (2) of the garbage incinerator is opened, the second gate valve (3) at the lower part of the dry garbage adding bin (2) is closed, the high-heat value of the other dry garbage (hereinafter referred to as dry garbage) classified by the community is added into the dry garbage adding bin (2) through the lifting conveyor, after the second gate valve (3) at the lower part of the dry garbage adding bin (2) is opened, the second gate valve (3) at the lower part of the dry garbage adding bin (2) is closed, the first gate valve (1) at the upper part of the dry garbage adding bin (2) is opened, the other dry garbage (hereinafter referred to as dry garbage) classified by the community is added into the dry garbage adding bin (2) through the lifting conveyor, when the dry garbage needs to be added into the furnace body (5) of the garbage incinerator, the second gate valve (3) at the lower part of the dry garbage adding bin (2) is opened, the dry garbage falls into the dry garbage (5) of the garbage incinerator in the high-heat value of the garbage incinerator in the circulating mode of the high-pressure region (3000) at the high pressure of the air of the garbage incinerator (5) in the high-pressure region (5000) of the garbage incinerator is circulated in the garbage incinerator (5) classified by the community, a large amount of heat is released during the incineration of the dry garbage, and the incineration temperature reaches 900-1100 ℃;

opening the third gate valve (19) at the upper part of the wet garbage adding bin (20), closing the fourth gate valve (21) at the lower part of the wet garbage adding bin (20), adding low-calorific-value kitchen wet garbage (hereinafter referred to as wet garbage) classified by communities into the wet garbage adding bin (20) through a lifting conveyor, closing the third gate valve (19) at the upper part of the wet garbage adding bin (20), opening the fourth gate valve (21) at the lower part of the wet garbage adding bin (20), then dropping wet garbage from the wet garbage adding bin (20) onto a movable grate (26), then closing the fourth gate valve (21) at the lower part of the wet garbage adding bin (20), opening the third gate valve (19) at the upper part of the wet garbage adding bin (20) through a lifting conveyor, when the wet garbage needs to be added onto the movable grate (26), changing the wet garbage into dry garbage by the circulated wet garbage adding mode into the movable grate (26), drying the dry garbage by the heat of the movable grate (26), drying the dry garbage by the dry garbage, and drying the dry garbage in the movable grate (7, the dry garbage is burnt to ashes along with the movement of the movable grate (26) to a high-temperature incineration zone (7) of the garbage at the lower part of a furnace body (5) of the incinerator, ashes or slag generated in the high-temperature incineration zone (7) are conveyed to a slag collecting tank (30) along with the movement of the movable grate (26), the ashes or slag runs through a slag conveyor (31) and is discharged out of the garbage incinerator through a slag outlet (36); a water pipe type furnace bridge (16) is arranged in the incinerator, and water in a water pipe becomes hot water or becomes water vapor for heating resource utilization after the furnace bridge (16) is heated; when the garbage burns in the incinerator, an electric spiral pushing plate (14) is adopted to push and loosen the garbage heated into mounds and agglomerations in the incinerator for normal incineration; a fire observation camera probe (18) is arranged on the garbage incinerator, so that the air inlet quantity of a blower (23) is conveniently controlled, and the temperature in the incinerator and the garbage incineration to the ashes are controlled;

the dry garbage is burnt in a high temperature area (7) where the dry garbage is burnt at a positive pressure higher than the atmospheric pressure (namely 3000-5000 pa), open flame flue gas generated by burning is discharged into a secondary combustion chamber (43) from a flue gas outlet (38), positive pressure air sent by a blower (23) and dioxin, carbon monoxide and organic waste gas in the flue gas are further burnt to decompose through oxidation-reduction reaction, and the high temperature flue gas discharged from the secondary combustion chamber (43) is subjected to conventional quenching and cooling heat exchange, alkali liquor spray tower deacidification, electrostatic dust removal and activated carbon adsorption standard reaching treatment and then discharged to the environment through a chimney; through detection, all indexes in discharged flue gas reach the discharge standard of national standard GB 1885-2014 "domestic waste incineration pollution control Standard", wherein the content of dioxin is 0.051TEQng/Nm ³ Carbon monoxide (CO) content of less than 3mg/m ³ The blackness (green man grade) of the flue gas is less than 1.

Claims (1)

1. A positive pressure garbage incinerator with a moving grate and a secondary combustion chamber, comprising: the incinerator comprises a incinerator body (5), a wet garbage feeding bin (20), a dry garbage feeding bin (2), a pushing device, a water pipe type bridge (16), a water tank (9), a secondary combustion chamber (43), a movable grate (26), a slag conveyor (31) and a blower (23); the method is characterized in that: the lower flue gas outlet (47) of the incinerator body (5) is communicated with the air inlet of the secondary combustion chamber (43) through a flange (42), the bottom of the incinerator body (5) is arranged in the middle of the top of the movable grate shell (24) and communicated with the slag discharging port of the slag conveyor (31), the feeding port (44) at one end of the movable grate shell (24) is communicated with the discharging port of the wet garbage feeding bin (20), the gate valve III (19) is arranged at the upper part of the wet garbage feeding bin (20), the gate valve IV (21) is arranged at the lower part of the wet garbage feeding bin (20), the air outlet of the air blower (23) is communicated with the air inlet II (32) of the shell of the secondary combustion chamber (43) through a pipeline and a valve I (29), and the air outlet of the air blower (23) is communicated with the air inlet (28) of the air bin (27) through a pipeline and a valve II (40); a dry garbage adding bin (2) is arranged at the top of a furnace body (5) of the incinerator, a first gate valve (1) is arranged at the top of the dry garbage adding bin (2) and a second gate valve (3) is arranged at the bottom of the dry garbage adding bin, and a garbage combustion buffer area (46) in the furnace body (5) is arranged below the second gate valve (3); the water tank (9) is communicated with a water jacket (10) arranged on the upper shell of the incinerator body (5) through a second pipeline (45); the furnace body (5) of the incinerator belongs to a cylindrical shell made of metal, a layer of refractory heat-insulating material (17) is built on the inner wall of the lower part of the furnace body (5) of the incinerator, a water jacket (10) is arranged on the outer shell of the upper part of the furnace body (5) of the incinerator, a pushing plate (14) of a pushing device is arranged in the middle lower part of the furnace body (5) of the incinerator according to the horizontal direction, a water pipe type furnace bridge (16) is arranged on the lower part of the pushing plate (14), the water pipe type furnace bridge (16) is connected and communicated with the water jacket (10) through a water pipe (11), a flue gas outlet (47) of the furnace body is arranged on the side surface of the furnace body (5) on the lower part of the water pipe type furnace bridge (16), a wind bin (27) is arranged on the outer layer on the lower part of the furnace body (5) of the incinerator, a plurality of air inlets (22) which are connected and communicated with each other are arranged between the high temperature region (7) and the wind bin (27), and the gas outlet (4) on the upper part of the furnace body (5) of the incinerator is communicated with the gas inlet (15) of the furnace body (5) through a pipeline (12); the movable fire grate (26) comprises a reciprocating fire grate or a chain fire grate, and is driven by a motor or a hydraulic motor, the fire grate shell (24) belongs to a sealed cuboid made of metal, and the movable fire grate (26) is arranged in the fire grate shell (24); a slag conveyor (31) comprising a scraper slag extractor, a screw slag extractor and a crawler conveyor; the pushing device belongs to a conventional electric telescopic screw pushing machine and comprises an electric screw pushing machine control device (13) and a pushing plate (14), wherein the pushing plate (14) is fixed at the top end of a telescopic rod of the screw pushing machine, the other end of the screw is connected with the screw pushing machine control device (13), when a motor is started, the screw of the screw pushing machine rotates, the screw stretches into the furnace body (5) from the outside of the furnace body (5) during forward rotation, the pushing plate (14) pushes garbage in a garbage incineration buffer zone (46) to the middle of the furnace body (5) so as to prevent the garbage from being burnt into lumps by heating and then staying in an incineration high-temperature zone (7) of the garbage, which does not fall down into the furnace body (5) for incineration; when the screw rod is reversed, the screw rod is retracted from the furnace body (5); the secondary combustion chamber (43) is formed by a steel pipe and refractory materials, a layer of refractory materials (48) is built on the inner wall of the steel pipe for heat preservation, a secondary combustion chamber shell (34) is arranged on the outer layer of the steel pipe, a second air inlet (32) is arranged on the shell (34), and a plurality of second air inlets (35) which are connected and communicated are arranged between the interior of the steel pipe and an air duct (33) of the secondary combustion chamber; the wind bin belongs to a wind cache area or a wind inlet box body; the water tank belongs to a conventional boiler water inlet or water supplementing tank, and a water level controller is arranged in the water tank.

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