Hydrogen-oxygen flame incineration system for domestic waste

Abstract

The application discloses a household garbage hydrogen-oxygen flame incineration treatment system, which is characterized by comprising a household garbage hydrogen-oxygen flame incineration and a nano microbubble quenching tower; the household garbage hydrogen-oxygen flame incineration furnace comprises a first combustion chamber, a second combustion chamber and a third combustion chamber arranged from bottom to top; the first combustion chamber is provided with a feeding port; a multi-stage hydrogen-oxygen flame purification ring is arranged at the connection position of the second combustion chamber and the third combustion chamber; a smoke exhaust port connected with a smoke treatment system is arranged above the third combustion chamber; the nano microbubble quenching tower comprises a tower body, a smoke pipe is spirally arranged outside the tower body, and an air inlet section, a cooling section, a spraying section and a drying section are sequentially arranged in the tower body from bottom to top. In the structure, the incineration furnace adopts a single furnace vertical integrated form, the occupied area is small, and the pyrolysis gas production is stable. In the purification tower, the smoke can be rapidly cooled, so that the situation that dioxin is generated again in the smoke cooling process is avoided, and the safety of smoke emission is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of garbage disposal, and particularly relates to a hydrogen-oxygen flame incineration system for household garbage. BACKGROUND

[0002] Garbage is the waste produced in human daily life and production, and needs harmless, resourceful, reduced and socialized treatment due to large discharge, complex components, pollution, resources and society. If not properly treated, it will pollute the environment, affect environmental health, waste resources, destroy production and life safety, and destroy social harmony. The widely used garbage disposal method today is sanitary landfill, high-temperature composting and incineration.

[0003] In the existing garbage incineration device, especially in the incineration of household garbage, the flue gas generated by the incineration system may contain acidic substances such as chlorides and sulfides and other harmful substances, which cannot meet the emission standard. At the same time, the cooling effect of the flue gas is poor, and the cooling speed is slow. Studies have shown that in addition to the incomplete combustion process at low temperature, dioxin will also be generated again in the middle temperature section of the flue gas due to the heterogeneous catalytic reaction of fly ash, causing the flue gas emission to exceed the standard.

[0004] In summary, in the existing incineration system, there are problems of high energy consumption, large fly ash in the incineration process, and poor flue gas cooling effect, which may lead to the secondary generation of dioxin. SUMMARY

[0005] The purpose of the present application is to provide a hydrogen-oxygen flame incineration system for household garbage to solve the problems in the prior art.

[0006] The present application is achieved by the following technical scheme: a hydrogen-oxygen flame incineration system for household garbage, characterized by comprising a hydrogen-oxygen flame incineration for household garbage and a nano microbubble quenching tower.

[0007] The hydrogen-oxygen flame incinerator for household garbage comprises a first combustion chamber, a second combustion chamber and a third combustion chamber arranged from bottom to top; a feeding port matched with a feeding device is arranged below the first combustion chamber, a rotary furnace bed is arranged below the feeding port, hydrogen-oxygen flame guns are arranged around the rotary furnace bed, and a slag discharger is arranged below the rotary furnace bed; a first air supplement port is arranged below the first combustion chamber; a multi-stage hydrogen-oxygen flame purification ring is arranged at the connection between the second combustion chamber and the third combustion chamber, combustion-supporting air distribution pipelines are arranged below the second combustion chamber and above and below the multi-stage hydrogen-oxygen flame purification ring; and a flue gas discharge port connected with a flue gas treatment system is arranged above the third combustion chamber.

[0008] The nanobubble quenching tower comprises a tower body, a smoke pipe is spirally arranged outside the tower body, and an air inlet section, a cooling section, a spraying section and a drying section are sequentially arranged in the tower body from bottom to top; the tower body of the air inlet section is provided with an air inlet communicated with the lower end of the smoke pipe, and is further provided with a drain outlet communicated with a nanobubble water tank; the inner cavity of the cooling section is in the shape of a sandglass, and a cooling device is arranged on the cavity wall; a plurality of porous plates are further arranged in the cooling section; the spraying section is provided with a spraying pipe communicated with the nanobubble water tank outside the tower; and the drying section is provided with a sieve plate, and a drying agent layer is arranged on the sieve plate.

[0009] Further, a gas-water separator is arranged in the first combustion chamber, and a drain outlet of the gas-water separator is communicated with a water channel type slag remover at the lower part of the rotary furnace bed; and a cooling water jacket is arranged on the inner wall of the furnace body of the incinerator.

[0010] Further, the multistage hydrogen-oxygen flame purification ring and the igniter are both communicated with a hydrogen-oxygen generator; the hydrogen-oxygen flame pyrolysis ring is a hollow ring and is communicated with the hydrogen-oxygen generator, and a plurality of air holes are uniformly arranged on the hydrogen-oxygen flame pyrolysis ring.

[0011] Further, the nanobubble water tank comprises a tank body, and a nanobubble generator and a circulating pump are arranged in the tank body.

[0012] Further, the nanobubble water tank comprises a tank body, and a nanobubble generator and a circulating pump are arranged in the tank body.

[0013] Further, the slag remover is a scraper slag remover.

[0014] The advantages of the present application are as follows: in the structure of the present application, the incinerator adopts a single furnace vertical integrated form, and the land occupation area is small; the garbage is continuously fed through the auger, which can not only be closed but also can be uniformly fed, so that when the stable operation is stable, the pyrolysis gas production is stable, and the hydrogen-oxygen flame in the premixing chamber can be self-ignited, and the energy consumption of the hydrogen-oxygen flame is low and can be ignored. The high-temperature flue gas after incineration enters the flue gas treatment system through the pipeline for treatment. In the purification tower, the flue gas can be quickly cooled, so that the situation of generating dioxin again in the flue gas cooling process is avoided, and the safety of flue gas emission is improved. In addition, the structure of the present application is compact, the land occupation area is small, and the cooling and purification effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application;

[0016] The numbers in the diagram are explained as follows: 1 is the auger support, 2 is the feeding elevator, 3 is the hopper, 4 is the auger, 5 is the slag remover, 6 is the combustion fan I, 7 is the combustion fan II, 8 is the rotary hearth, 9 is the first combustion chamber, 12 is the condensate separator, 13 is the combustion air distribution pipeline, 14 is the oxyhydrogen flame gun, 15 is the oxyhydrogen flame ring in the second combustion chamber, 16 is the second combustion chamber, 17 is the multi-stage oxyhydrogen flame purification ring, 18 is the third combustion chamber, 19 is the flue, 22 is the flue, 23 is the deacidification cyclone tower, 24 is the support, 25 is the water-cooled wall, 26 is the spray pipe, 27 is the desiccant layer, 28 is the discharge port, 40 is the tower body, 41 is the air inlet section, 42 is the cooling section, 43 is the spray section, and 44 is the drying section. Detailed Implementation

[0017] like Figure 1 As shown, the present invention discloses a hydrogen-oxygen flame incineration system for municipal solid waste, including a hydrogen-oxygen flame incineration unit for municipal solid waste and a nano-microbubble quench tower.

[0018] The municipal solid waste hydrogen-oxygen flame incinerator includes a first combustion chamber 9, a second combustion chamber 16, and a third combustion chamber 18 arranged from bottom to top. A feed inlet cooperating with a feeding device is located below the first combustion chamber. A rotary hearth 8 for receiving waste is located below the feed inlet. Hydrogen-oxygen flame guns 14 with igniters are arranged around the rotary hearth. A slag remover 5 is located below the rotary hearth. A first air supply inlet is located below the first combustion chamber and is connected to a combustion air blower 6. A multi-stage hydrogen-oxygen flame purification ring 17 is located at the connection between the second and third combustion chambers. Combustion air distribution pipes 13 are located below the second combustion chamber, above the multi-stage hydrogen-oxygen flame purification ring, and below the combustion air distribution ring. Combustion air distribution pipes 13 are connected to a combustion air blower 7. A flue gas outlet connected to a flue gas treatment system via a flue pipe 19 is located above the third combustion chamber.

[0019] The nano-microbubble quench tower includes a tower body 40, with a flue pipe 22 spirally arranged on the outside of the tower body. Inside the tower body, from bottom to top, there are an air inlet section 41, a cooling section 42, a spray section 43, and a drying section 44. The air inlet section 41 has an air inlet 411 connected to the lower end of the flue pipe and a drain outlet 412 connected to the microbubble water tank. The inner cavity of the cooling section is hourglass-shaped, and a cooling device, which is a water-cooled wall 25, is provided on the cavity wall. The cooling section also has a multi-layer perforated plate 421, which can disperse the flue gas and make it rise evenly. The spray section has a spray pipe 26, which is connected to the microbubble water tank outside the tower. The drying section 44 has a sieve plate 441, on which a desiccant layer 27 is provided. An exhaust port 28 is provided on the upper part of the tower body of the drying section. The exhaust port is connected to an induced draft fan 37 through a pipeline. The induced draft fan is connected to a chimney 38.

[0020] Preferably, a gas-water separator 12 is arranged in the first combustion chamber, and the water outlet of the gas-water separator is connected with the slag discharger. Uniform holes are arranged vertically on the wall of the first combustion chamber, and water vapor generated during the heating of the garbage with certain moisture meets the holes, and the water vapor is automatically separated along the holes and flows to the water slag pit at the edge of the rotary hearth, thereby cooling the slag and playing a role of air supply closure of the first combustion chamber.

[0021] Preferably, the feeding device comprises an auger support 1, a feeding elevator 2, a hopper 3, and an auger 4.

[0022] Preferably, a cooling water jacket is arranged on the inner wall of the incinerator body, so as to prevent the temperature in the furnace from being too high and avoid the occurrence of glass sintering phenomenon caused by local high temperature.

[0023] Preferably, the multi-stage oxyhydrogen flame purification ring and the oxyhydrogen flame gun are connected with the oxyhydrogen generator, the mixed gas generated by the oxyhydrogen generator is transported to the corresponding position through a pipeline, and can be combusted as needed.

[0024] Preferably, the oxyhydrogen flame pyrolysis ring is a hollow ring connected with the oxyhydrogen generator, and a plurality of air holes (or air nozzles) are uniformly arranged on the oxyhydrogen flame pyrolysis ring, which can realize oxyhydrogen flame combustion in cooperation with the igniter.

[0025] Preferably, the slag discharger is a scraper type slag discharger.

[0026] Preferably, an annular air slot is arranged at the lower part of the first combustion chamber, the annular air slot is arranged with three L-shaped air ducts, and three drag wheels are arranged on the air slot, and the air slot sends air and oxygen upward, and the air is uniformly supplied to the pyrolysis garbage on the rotary hearth through the progressive air holes on the rotary hearth to catalyze combustion. The rotary hearth is in an inverted cone shape, and a plurality of progressive air holes are arranged on the hearth.

[0027] Preferably, the deacidification cyclone tower 23 is further arranged between the lower end of the smoke pipe and the air inlet, and the lower end is provided with a support 24.

[0028] Preferably, the microbubble water tank comprises a tank body, and a microbubble generator and a circulating pump are arranged in the tank body.

[0029] Preferably, the drying agent is activated carbon.

[0030] Preferably, the cooling device is a cooling water pipe connected with an external circulating cooling system.

[0031] Preferably, a cooling water jacket 401 is arranged in the tower wall of the tower body.

[0032] Preferably, a water seal is arranged between the gas outlet of the deacidifying cyclone tower and the gas inlet of the nanometer microbubble quenching tower.

[0033] The working process and principle of the present application are as follows:

[0034] The shredded garbage waste is unloaded into a garbage waste temporary storage room, and the garbage is continuously fed into the household garbage hydrogen-oxygen flame incineration system by the feeding mechanism, and the auger 4 continuously feeds, and the multiple hydrogen-oxygen flame purification ring is ignited to preheat the second combustion chamber and the third combustion chamber. When the garbage is observed to be in place through the fire observation sight glass 11, and when the second and third combustion chambers are preheated to 850 DEG C, the garbage at the bottom of the furnace is ignited by the hydrogen-oxygen flame gun, and air less than the theoretical air amount is blown in, and the air amount is between 0.3-0.5 times the theoretical air amount, so that the long-chain organic compound components in the garbage are rapidly cracked into short-chain combustible gas (including hydrocarbons, carbon monoxide, hydrogen, etc.) in an oxygen-deficient environment. The combustible gas is fully mixed with excess air after entering the second and third combustion chambers, and high-temperature peroxide (excess air coefficient 1.8) combustion is carried out, the molecular structure of the toxic and harmful substances in the flue gas is completely destroyed, and the "3T1E" (Temperature combustion temperature, Time residence time, Turbulence turbulence, Excessive air coefficient air excess coefficient) principle of garbage incineration is met, and the flue gas temperature at the outlet of the combustion furnace is greater than 850 DEG C, and the residence time is more than 2 seconds. After the garbage reaction is completed, it is discharged through the slag discharge system. The present project adopts a single furnace vertical integrated form, and the land occupation is small. The garbage is continuously fed by the auger, which not only seals but also uniformly feeds, so that the pyrolysis gas production is stable during stable operation, and the pyrolysis gas can self-ignite, and the hydrogen-oxygen flame energy consumption of the premixing chamber is low and can be ignored. The high-temperature flue gas at 900 DEG C after incineration enters the cyclone tower for acid removal, and then enters the nanometer microbubble quenching tower to rapidly cool the flue gas temperature to 200 DEG C in the shortest time, and removes the acid gas in the flue gas to ensure that the flue gas does not condense in the subsequent pipeline and equipment, and the water molecules in the nanometer microbubble quenching tower are completely evaporated, which will not form sludge or mud, and there is no waste water discharge, and the water molecule groups sprayed into the equipment absorb heat and vaporize, and the flue gas enters the rear-end equipment. Activated carbon powder and lime powder are sprayed into the pipeline, and the absorbents are uniformly mixed in the flue gas, and are deposited on the bag wall of the bag filter to form a powder net, and adsorb heavy metals and dioxin substances in the flue gas, and further remove the acid. After the flue gas is filtered and dusted by the bag filter, it is discharged through the chimney.

[0035] In addition, since the garbage is in static state during pyrolysis, the hydrogen-oxygen flame gasification pyrolysis garbage treatment device uses insufficient air (oxygen-deficient type) to volatilize the combustible gas in the garbage, the garbage is not stirred, and the garbage is not stirred, so that the garbage is not stirred, and the garbage is not stirred. The combustion of a large amount of excess air can cause turbulence and dust raising, so the solid particle emission is extremely small, and the smoke dust emission is low. The amount of harmful pollutants generated is low, and after the hydrogen-oxygen flame high-temperature incineration, the load of the tail treatment equipment is greatly reduced.

Claims

1. A municipal solid waste hydrogen-oxygen flame incineration system, characterized in that: Including hydrogen-oxygen flame incinerators for municipal solid waste and nano-microbubble quench towers; The municipal solid waste hydrogen-oxygen flame incinerator includes a first combustion chamber, a second combustion chamber, and a third combustion chamber arranged from bottom to top. A feed inlet cooperating with a feeding device is located below the first combustion chamber. A rotating furnace bed is located below the feed inlet, and hydrogen-oxygen flame guns are arranged around the rotating furnace bed. A slag remover is located below the rotating furnace bed. A first make-up air inlet is located below the first combustion chamber. A multi-stage hydrogen-oxygen flame purification ring is located at the connection between the second and third combustion chambers. Combustion air distribution pipes are located below the second combustion chamber, above the multi-stage hydrogen-oxygen flame purification ring, and below it. A flue gas outlet connected to a flue gas treatment system is located above the third combustion chamber. The nanobubble quench tower includes a tower body with a spirally arranged flue pipe on the outside of the tower body. Inside the tower body, from bottom to top, there are an air inlet section, a cooling section, a spray section, and a drying section. The air inlet section has an air inlet connected to the lower end of the flue pipe and a drain outlet connected to the microbubble water tank. The inner cavity of the cooling section is hourglass-shaped, and a cooling device is installed on the cavity wall. Multiple sets of perforated plates are also installed in the cooling section. The spray section has a spray pipe connected to the microbubble water tank outside the tower. The drying section has a sieve plate with a desiccant layer on it. The multi-stage hydrogen-oxygen flame purification ring and the igniter are both connected to the hydrogen-oxygen generator; the multi-stage hydrogen-oxygen flame purification ring is a hollow ring and is connected to the hydrogen-oxygen generator, with multiple pores evenly arranged on the multi-stage hydrogen-oxygen flame purification ring.

2. The municipal solid waste hydrogen-oxygen flame incineration system according to claim 1, characterized in that: A gas-water separator is installed in the first combustion chamber, and the drain outlet of the gas-water separator is connected to the ash discharge device; a cooling water jacket is installed on the inner wall of the incinerator.

3. The municipal solid waste hydrogen-oxygen flame incineration system according to claim 1, characterized in that: It also includes a deacidification cyclone tower, which is located between the lower end of the flue and the air inlet.

4. The municipal solid waste hydrogen-oxygen flame incineration system according to claim 1, characterized in that: The microbubble water tank includes a tank body, inside which a microbubble generator and a circulation pump are installed.

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