CN217178524U - Hazardous waste incineration disposal system - Google Patents

Abstract

The utility model discloses a hazardous waste incineration treatment system, which comprises a feeding incineration system and a tail gas treatment system; the feeding incineration system comprises a garbage feeding device, a rotary kiln and a secondary combustion chamber which are sequentially connected; the tail gas treatment system comprises a boiler, a quenching acid removal tower, a dry reactor, a bag-type dust remover, a heater and a flue gas tower which are sequentially connected through a pipeline, a denitration treatment device is communicated with the boiler, a first acid removal device is communicated with the upper end of the quenching acid removal tower, a second acid removal device is communicated with the lower portion of the dry reactor, a heat exchanger is arranged in the heater, the lower end of the heater is connected with a third acid removal device, the gas outlet end of the third acid removal device is connected with the inlet end of the heat exchanger, and the outlet end of the heat exchanger is connected with the flue gas tower. The utility model discloses can burn harmful rubbish and handle tail gas.

Description

Hazardous waste incineration disposal system

Technical Field

The utility model belongs to the technical field of waste incineration production line technique and specifically relates to a hazardous waste incineration processing system is related to.

Background

In medical system and some chemical plants, can produce a large amount of harmful rubbish every day, if do not handle these rubbish, direct emission can cause serious environmental pollution, even to medical waste, probably can make some germ take place the diffusion, cause serious harm, consequently need carry out high temperature to it and burn, for satisfying above-mentioned requirement, the burning process needs to be accomplished through a complete production line, and when handling the waste gas after burning, need carry out the desorption to the acid material in the waste gas, guarantee that it satisfies the emission requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide a hazardous waste burns processing system.

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

a hazardous waste incineration disposal system comprises a feed incineration system and a tail gas treatment system;

the feeding incineration system comprises a garbage feeding device, a rotary kiln and a secondary combustion chamber which are sequentially connected;

the tail gas treatment system comprises a boiler, a quenching acid removal tower, a dry-type reactor, a bag-type dust remover, a heater and a flue gas tower which are sequentially connected through a pipeline, denitration treatment equipment is communicated on the boiler, first acid removal equipment is communicated at the upper end of the quenching acid removal tower, second acid removal equipment is communicated at the lower part of the dry-type reactor, a heat exchanger is arranged in the heater, a third acid removal equipment is connected at the lower end of the heater, the gas outlet end of the third acid removal equipment is connected with the inlet end of the heat exchanger, and the outlet end of the heat exchanger is connected with the flue gas tower.

The garbage feeding device comprises a garbage can and a feeding hopper, a plate feeding machine is arranged at an outlet below the garbage can, the other end of the plate feeding machine, which is far away from the garbage can, extends to the upper part of the feeding hopper, two gate plates are arranged at the lower part of the feeding hopper, a push rod is arranged below the feeding hopper, one end of the push rod extends to the rotary kiln, and the left side of the rotary kiln is also communicated with a diesel tank.

The rotary kiln is also connected with a main combustion fan and a combustion fan.

A slag conveyor is arranged below the second combustion chamber.

The denitration device comprises a urea solution tank and a urea stirring tank which are connected through a pipeline, and the liquid outlet end of the urea solution tank is connected with the upper part of the boiler through a pipeline.

The first deacidification equipment comprises a lime stirring tank and a lime solution tank which are connected through a pipeline, the upper part of the quenching deacidification tower is provided with a plurality of lime slurry spray guns, and the liquid outlet end of the lime solution tank is connected with the lime slurry spray guns.

The second acid removal device comprises a baking soda tank and an activated carbon tank, and the baking soda tank and the activated carbon tank are communicated with the lower part of the dry reactor through pipelines.

The third deacidification equipment comprises a washing tower, a waste liquid tank and an alkali liquor tank, wherein the waste liquid tank and the alkali liquor tank are connected with the washing tower through pipelines, and the upper part of the washing tower is connected with the heat exchanger.

The heat exchanger comprises an annular bottom pipe and an annular top pipe, the bottom pipe is communicated with the top pipe through a plurality of heat exchange pipes, the bottom pipe is communicated with a pipeline at the top of the washing tower, and the top pipe is communicated with the flue gas tower.

The beneficial effects of the utility model are that:

1. the waste garbage is conveyed into the rotary kiln for incineration through a garbage can and a feed hopper, the residue falls into a secondary combustion chamber and then is guided out to a slag conveyor, the waste gas is incinerated again through the secondary combustion chamber, the tail gas flows through a boiler for denitration, and flows through a quenching deacidification tower, a dry reactor and a washing tower for three-time deacidification treatment, so that the tail gas discharged by a flue gas tower meets the emission requirement;

2. the heat exchanger is arranged in the heater, the tail gas after the secondary deacidification is used for heating the tail gas after the tertiary deacidification, so that the utilization of the incineration waste heat is improved, and the phenomenon of 'white smoke' can be eliminated after the heated tail gas is discharged.

Drawings

FIG. 1 is a flow diagram of a hazardous waste incineration disposal system;

FIG. 2 is a front view of the rotary kiln;

FIG. 3 is a cross-sectional view taken at A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B in FIG. 2;

FIG. 5 is a cross-sectional view taken at C of FIG. 2;

FIG. 6 is a schematic view of the structure of the kiln mouth iron and air inlet cover shell ring;

FIG. 7 is a schematic structural view of a rotary kiln cylinder;

FIG. 8 is a right side view of the rotary kiln drum in cooperation with an air inlet cover section;

FIG. 9 is a schematic view of the structure of the rotary kiln barrel body matched with the air inlet cover shell section;

FIG. 10 is a schematic view of the structure of the rotary kiln barrel in cooperation with a ventilation duct;

FIG. 11 is a front view of the second combustion chamber;

FIG. 12 is a right side view of the second combustion chamber;

FIG. 13 is a schematic view of the structure of the second combustion chamber in cooperation with the second combustion chamber mounting frame;

FIG. 14 is a schematic view of the structure of FIG. 11 at D;

FIG. 15 is a top view of the mounting ears in cooperation with the second combustion chamber mounting bracket;

FIG. 16 is a schematic diagram of the structure of a quench acid removal tower and a dry reactor;

FIG. 17 is a top view of a quench acid tower and a dry reactor;

FIG. 18 is a schematic structural view of an intake manifold;

FIG. 19 is a schematic view of a heater configuration;

fig. 20 is a top view of a lower tube and heat exchange tube.

In the figure: garbage can 1, feed hopper 2, flashboard 3, push rod 4, rotary kiln 5, rotary kiln barrel 51, kiln tail belt wheel 52, gear ring 53, kiln head belt wheel 54, kiln tail supporting wheel 55, transmission 56, motor 57, kiln head supporting wheel 58, buffer sheet 59, hinged support 510, wheel belt backing plate 511, first reinforced barrel section 512, second reinforced barrel section 513, air inlet cover barrel section 514, kiln mouth protecting iron 515, stainless steel pipe 516, limit ring 517, positioning hole 518, wheel blocking device 519, upper air pipe 520, air inlet pipe 521, lower air pipe 522, main air pipe 523, air inlet cover cone 524, secondary combustion chamber 6, secondary combustion chamber body 61, smoke outlet 62, valve body pressure relief 63, pressure relief valve 64, manual stretching device 65, pneumatic stretching device 66, secondary combustion chamber upper mounting lug 67, air supplementing device 68, air supplementing header 681, air supplementing branch pipe 682, air supplementing pipe orifice 683, air supplementing spray nozzle mounting rack 684, secondary combustion chamber mounting rack 69, upright column 691, rotary kiln head 69, rotary kiln head supporting roller 51, kiln head supporting wheel 55, kiln head supporting wheel supporting, A cross bar 693, an inclined bar 693, a secondary combustion chamber lower mounting lug 610, a flue gas inlet 611, a quenching acid-removing tower 7, a quenching tower body 71, a lime slurry spray gun 72, a spray gun flushing tank 73, a steel bracket 74, a second air inlet flow-dividing fence 75, a flue gas inlet elbow 76, a flue gas outlet pipe 77, an upper elbow 771, a straight pipe 772, a lower elbow 773, a first knife gate valve 78, a second knife gate valve 79, an elbow 710, a dry reactor non-metal expansion joint 711, a Venturi tube 712, an ash cleaning port 713, a first air inlet flow-dividing fence 714, a boiler 8, a baking soda tank 9, a slag dragging machine 10, a urea solution tank 11, a urea stirring tank 12, a lime tank 13, a lime stirring tank 14, a lime solution tank 15, a flue gas tower 16, a heater 17, a washing tower 18, a waste liquid tank 19, a soda liquid tank 20, a precooler 21, a bag dust collector 22, a dry reactor 23, a diesel tank 24, an activated carbon tank 25, a plate feeder 26, a main combustion fan 27, a primary combustion chamber lower mounting lug 74, a steel bracket, a bracket, combustion fan 28, heat exchanger 29, bottom tube 291, heat exchange tube 292, top tube 293

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

1-20, a hazardous waste incineration system, comprising a feed incineration system and a tail gas treatment system;

the feeding incineration system comprises a garbage feeding device, a rotary kiln 5 and a secondary combustion chamber 6 which are connected in sequence;

the garbage feeding device comprises a garbage can 1 and a feed hopper 2, a plate feeding machine 26 is arranged at an outlet at the lower part of the garbage can 1, the other end of the plate feeding machine 26, which is far away from the garbage can 1, extends to the upper part of the feed hopper 2, two gate plates 3 are arranged at the lower part of the feed hopper 2, a push rod 4 is arranged below the feed hopper 2, one end of the push rod 4 extends to a rotary kiln 5, a diesel tank 24 is also communicated with the left side of the rotary kiln 5, the garbage is required to pass through the following steps before entering the rotary kiln, after being poured into the garbage can 1, the garbage is conveyed to the feed hopper 2 through the plate feeding machine 26, after the first gate plate 3 is opened, part of the garbage falls into the second gate plate 3, the first gate plate 3 is closed, the second gate plate 3 is opened, the garbage falls into the push rod 4, the second gate plate 3 is closed, the push rod 4 conveys the garbage into the rotary kiln 5, the steps are repeated, and the control of the two gate plates 3 can avoid excessive garbage falling into the garbage push rod 4, a certain burden is imposed on the push rod 4;

the rotary kiln 5 is also connected with a main combustion fan 27 and a combustion fan 28 for blowing air into the rotary kiln 5 so that wastes can be fully combusted;

the rotary kiln 5 comprises a rotary kiln cylinder body 51, a gear ring 53 is arranged on the periphery of the rotary kiln cylinder body 51, the gear ring 53 is driven by a motor 57, the motor 57 is connected with the gear ring 53 for transmission through a transmission device 56, an air cooling device is arranged at the right end of the rotary kiln cylinder body 51, the air cooling device comprises an air inlet cover cylinder section 514 arranged on the periphery of the rotary kiln cylinder body 51, a plurality of stainless steel pipes 516 are uniformly distributed at the right end of the air inlet cover cylinder section 514, a certain distance is reserved between the two stainless steel pipes 516, one end of each stainless steel pipe 516 extends to the rotary kiln cylinder body 51 and is welded with the rotary kiln cylinder body 51, and a ventilation pipeline is arranged on the left side of the air inlet cover cylinder section 514;

the rotary kiln comprises a rotary kiln barrel 51, a kiln head belt wheel 54 and a kiln tail belt wheel 52 are arranged on the rotary kiln barrel 51, a plurality of belt backing plates 511 are uniformly distributed on the outer wall of the rotary kiln barrel 51, the kiln head belt wheel 54 and the kiln tail belt wheel 52 are mounted on the belt backing plates 511, so that friction between the kiln head belt wheel and the rotary kiln barrel 51 is increased, the rotary kiln barrel 51 is more reliable in rotation, the kiln head belt wheel 54 is arranged on the left side of a gear ring 53, the kiln head belt wheel 58 corresponds to the kiln head belt wheel 54 and is arranged on the lower portion of the kiln head belt wheel 54, wheel blocking devices 519 are further arranged on the left side and the right side of the kiln head belt wheel 54, the kiln tail belt wheel 52 is arranged on the right side of the gear ring 53, and the kiln tail belt wheel 55 corresponds to the kiln tail belt wheel 52 and is arranged on the lower portion of the kiln tail belt wheel 52;

a plurality of hinged supports 510 are uniformly distributed on the inner ring of the gear ring 53, buffer sheets 59 are hinged on the hinged supports 510, torsion springs are arranged between the buffer sheets 59 and the hinged supports 510, the length of each buffer sheet 59 is larger than the distance between each hinged support 510 and the rotary kiln cylinder 51, and one end, far away from the hinged supports 510, of each buffer sheet 59 is attached to the rotary kiln cylinder 51;

the rotary kiln barrel 51 comprises a first reinforcing cylindrical section 512 and a second reinforcing cylindrical section 513, a kiln head belt pulley 54 and a gear ring 53 are arranged on the first reinforcing cylindrical section 512, and a kiln tail belt pulley 52 is arranged on the second reinforcing cylindrical section 513;

the ventilation duct comprises a main air duct 523, an upper air duct 520, a lower air duct 522 and a plurality of air inlet pipes 521, wherein the main air duct 523 is communicated with the upper air duct 520 and the lower air duct 522, the upper air duct 520 is arranged above the rotary kiln cylinder 51, the lower air duct 522 is arranged below the rotary kiln cylinder 51, one sides of the upper air duct 520 and the lower air duct 522, which are close to the rotary kiln cylinder 51, are communicated with one end of the air inlet pipe 521, and the other end of the air inlet pipe 521 is arranged at a pipe orifice at the right end of the air inlet cover cylinder section 514;

a kiln mouth iron protector 515 is arranged at the right end of the rotary kiln cylinder 51, a limiting ring 517 is arranged on one side of the kiln mouth iron protector 515 close to the rotary kiln cylinder 51, the limiting ring 517 is attached to the inner wall of the rotary kiln cylinder 51, a plurality of positioning holes 518 are uniformly distributed on the rotary kiln cylinder 51 and the limiting ring 517, and bolts penetrate through the positioning holes 518 on the rotary kiln cylinder 51 and the limiting ring 517 and then extend into the stainless steel tube 516;

the number of the air inlet pipes 521 on the upper air pipe 520 is three, one air inlet pipe 521 is positioned right above the rotary kiln cylinder 51, the other two air inlet pipes 521 are symmetrically arranged at the front side and the rear side of the rotary kiln cylinder 51, the central angle formed by connecting the air inlet pipes 521 on the front side and the rear side of the rotary kiln cylinder 51, the air inlet pipe 521 positioned right above the rotary kiln cylinder 51 and the circle center of the rotary kiln cylinder 51 is 45 degrees, and the air inlet pipes 521 on the lower air pipe 522 and the air inlet pipes 521 on the upper air pipe 520 are symmetrically arranged;

an air inlet cover conical barrel 524 is arranged at the left end of the air inlet cover cylindrical section 514, and the air outlet end of the air inlet pipe 521 extends into the air inlet cover conical barrel 524;

the secondary combustion chamber 6 comprises a secondary combustion chamber body 61, a flue gas inlet 611 is arranged at the lower part of the secondary combustion chamber body 61, the flue gas inlet 611 is communicated with the rotary kiln 5 through a flue gas inlet elbow 76, an ash cleaning port 713 is arranged at one end, close to the secondary combustion chamber body 61, of the flue gas inlet elbow 76, a flue gas outlet 62 is arranged at the upper part of the secondary combustion chamber body 61, a pressure relief valve is arranged at the upper end of the secondary combustion chamber body 61, the pressure relief valve comprises a pressure relief valve body 63 communicated with the secondary combustion chamber body 61, a pressure relief valve 64 is rotatably connected to an opening of the pressure relief valve body 63, an opening device is arranged on the pressure relief valve 64, one end of the pressure relief valve 64 exceeds the pressure relief valve body 63 for a certain distance, the opening device is arranged at one end, exceeding the hydraulic valve body 63, of the pressure relief valve 64, the opening device comprises a manual stretching device 65 and a pneumatic stretching device 66, the manual stretching device comprises a balancing weight, a winch and a steel rope, the winch extends to the ground, and is convenient for ground personnel to operate the winch, the structure is the prior art, and is not described herein any more, the pneumatic stretching device 66 comprises a pneumatic disc and a steel rope, the pneumatic disc is fixed on the pressure relief valve body 63, the steel ropes of the pneumatic stretching device 66 and the manual stretching device 65 are both fixed at one end of the pressure relief valve 64 exceeding the hydraulic valve body 63, when the temperature in the secondary combustion chamber body 61 is detected to be too high, the pneumatic stretching device 66 is opened, the manual stretching device 65 assists in pulling the pressure relief valves 64 until the opening angle of the pressure relief valves is 45 degrees, the heat in the secondary combustion chamber is led out from the pressure relief valve, and the subsequent devices are prevented from being damaged by high-temperature gas;

an ignition device (not shown in the figure) is arranged in the secondary combustion chamber body 61, when combustible gas enters the secondary combustion chamber, the combustible gas is ignited, an air supplement device 68 is further arranged on the secondary combustion chamber body 61, the air supplement device 68 comprises an annular air supplement main pipe 681, the air supplement main pipe 681 is fixed with the side wall of the secondary combustion chamber body 61, the lower end of the air supplement main pipe 681 is communicated with a plurality of air supplement branch pipes 682, the upper end of the air supplement main pipe 681 is provided with an air supplement pipe orifice 683, the air supplement pipe orifice 683 is communicated with an air supplement machine (not shown in the figure), the air supplement machine continuously ventilates the air supplement pipe orifice 683, the air supplement branch pipes 682 are uniformly distributed relative to the secondary combustion chamber body 61, one end of the air supplement branch pipes 682 penetrating through the secondary combustion chamber body 61 is provided with an air supplement nozzle 684, the air supplement nozzle 684 deviates from the circle center of the secondary combustion chamber body 61 by a certain distance, when the air supplement nozzle 684 injects air in the secondary combustion chamber body 61, waste gas in the secondary combustion chamber is pushed to spirally convolute, the retention time of the tail gas in the secondary chamber is prolonged, so that the tail gas can be fully combusted.

Still include second combustion chamber mounting bracket 69, second combustion chamber body 61 is installed in second combustion chamber mounting bracket 69, and the side of second combustion chamber body 61 is equipped with the installation ear, and the installation ear is fixed in on second combustion chamber mounting bracket 69.

The installation ear includes that installation ear 67 and second combustion chamber install ear 610 down on the second combustion chamber, installation ear 67 and second combustion chamber install ear 610 down be located the upper and lower both sides of air supply device 68 respectively on the second combustion chamber, second combustion chamber mounting bracket 69 includes four stands 691, connect into the cuboid structure through horizontal pole 693 between two stands 691, be equipped with down tube 693 between two adjacent horizontal poles 693, horizontal pole 693 is located the below of installing ear 67 and second combustion chamber under installation ear 610 on the second combustion chamber, second combustion chamber is last to install ear 67 and the horizontal pole 693 of its below, the down tube 693 passes through bolted connection fixedly, second combustion chamber installs ear 610 rather than the horizontal pole 693 of below down, the down tube 693 passes through bolted connection fixedly, carry out dual fixed with second combustion chamber body 61, make second combustion chamber body 61's fixed more reliable.

A slag conveyor 10 is arranged below the secondary combustion chamber 6, the burned solid residues fall into the secondary combustion chamber 6, the solid residues are led out through the slag conveyor 10 and then are subjected to subsequent treatment, waste gas enters the secondary combustion chamber to be burned again, and tail gas enters a tail gas treatment system;

the tail gas treatment system comprises a boiler 8, a rapid cooling acid removal tower 7, a dry reactor 23, a bag-type dust remover 22, a heater 17 and a flue gas tower 16 which are sequentially connected through a pipeline, denitration treatment equipment is communicated with the boiler 8 and comprises a urea solution tank 11 and a urea stirring tank 12 which are connected through pipelines, the liquid outlet end of the urea solution tank 11 is connected with the upper part of the boiler 8 through a pipeline, urea is introduced into the boiler 8, atomized and then falls down, and is mixed with tail gas to react, nitrogen-containing waste in the tail gas is removed, the nitrogen-containing waste is continuously introduced into the rapid cooling acid removal tower 7 in a gaseous state, and dust contained in the flue gas partially falls into the bottom of the boiler 8 to be periodically cleaned;

the upper end of the rapid cooling deacidification tower 7 is communicated with a first deacidification device, the first deacidification device comprises a lime stirring tank 14 and a lime solution tank 15 which are connected through a pipeline, lime in the lime stirring tank 14 is led in through a lime tank 13, the rapid cooling deacidification tower 7 comprises a rapid cooling tower body 71, a plurality of lime slurry spray guns 72 are uniformly distributed at the upper part of the rapid cooling tower body 71, the liquid outlet end of the lime solution tank 15 is connected with the lime slurry spray guns 72, the lime slurry spray guns 72 emulsify the lime slurry and fall down in a spray shape, an air inlet flow distribution fence is arranged at the upper part of the rapid cooling tower body 71 and distributes the smoke to fully mix the lime slurry and the smoke and desulfurize the acid substances in the smoke, the lower end of the rapid cooling tower body 71 is a dust falling port, partial smoke dust of tail gas can fall into the dust falling port, a knife gate valve is arranged at the dust falling port, the knife gate valve comprises a first knife gate valve 78 and a second knife gate valve 79 which are arranged up and down, the arrangement of the two knife gate valves can prevent the smoke dust from falling too much and is inconvenient for ash removal, the lower part of the dry reactor 23 is a Venturi tube 712, the lower part of the quenching tower body 71 is communicated with the Venturi tube 712 through a bent tube 710, a baking soda nozzle and an active carbon nozzle are arranged at the Venturi tube 712, the waste gas after primary deacidification is introduced into the dry reactor through the bent tube 710, the Venturi tube 712 is communicated with a second deacidification device, the second deacidification device comprises a baking soda tank 9 and an active carbon tank 25, the baking soda tank 9 and the active carbon tank 25 are communicated with the baking soda nozzle and the active carbon nozzle, the active carbon and the baking soda are blown into the dry reactor 23 through a fan and are mixed with the waste gas to remove heavy metal substances and acidic substances, so that secondary deacidification is carried out;

the quantity of lime thick liquid spray gun 72 is four, and the angle between two lime thick liquid spray guns 72 is 90, guarantees that the lime thick liquid that lime spray gun 72 jetted can fully cover quench tower body 71, makes tail gas and lime thick liquid can the intensive mixing.

The reposition of redundant personnel fence 714 admits air includes that the first reposition of redundant personnel fence 714 admits air and the second reposition of redundant personnel fence 75 admits air, the second reposition of redundant personnel fence 75 admits air is located the first top of admitting air reposition of redundant personnel fence 714, first reposition of redundant personnel fence 714 admits air and the second reposition of redundant personnel fence 75 admits air by a plurality of parallel arrangement's iron set and constitutes, the iron set of first reposition of redundant personnel fence 714 that admits air and the iron set of second reposition of redundant personnel fence 75 admit air are 90 cross arrangement, tail gas is earlier tentatively broken up behind first reposition of redundant personnel fence 714 admits air, again through the second reposition of redundant personnel fence 75 admits air and is broken up twice, make tail gas fully expand and scatter, mix with lime thick liquid.

Be equipped with spray gun flushing tank 73 in quench tower body 1, spray gun flushing tank 73 locates the below of lime thick liquid spray gun 72, uses the back for a long time, needs wash the spray gun, and leading-in clear water in the spray gun pipe during washing fills with the clear water in spray gun flushing tank 73, need dismantle the spray gun when necessary, washs in the spray gun flushing tank, makes its washing more thoroughly clean.

The dry reactor nonmetal expansion joint 711 is arranged at the joint of the elbow 710 and the venturi tank 712, so that the elbow 710 and the venturi tank 712 are more reliably connected and are not easy to corrode, and the service life of the elbow is longer.

The upper part of the dry reactor 23 is provided with a flue gas outlet pipe 77, the flue gas outlet pipe 77 comprises a straight-through pipe 772, an upper bent pipe 771 arranged above the straight-through pipe 772 and a lower bent pipe 773 arranged below the straight-through pipe 772, the upper bent pipe 771 is communicated with the upper part of the dry reactor 23, and the lower bent pipe 773 is communicated with the bag-type dust collector 22, so that the mixing time of the tail gas, the baking soda and the active carbon is prolonged, and the acidic substances in the tail gas can be fully reacted.

The tail gas after the secondary deacidification enters a bag-type dust remover 22, solid particles are removed after the tail gas is filtered by the bag-type dust remover 22, and the tail gas is led out to a heater, wherein the temperature of the tail gas is higher;

the lower end of the heater 17 is connected with a third acid removing device, the third acid removing device comprises a washing tower 18, a waste liquid tank 19 and an alkali liquid tank 20, the waste liquid tank 19 and the alkali liquid tank 20 are connected with the washing tower 18 through pipelines, the upper part of the washing tower 18 is connected with a heat exchanger 29, a precooler 21 is connected between the heater 17 and the washing tower 18, high-temperature gas is cooled after passing through the precooler 21, the temperature of the gas entering the washing tower 18 is not too high, so that the washing tower 18 is damaged, the heat exchanger 29 is arranged in the heater 17, and the gas outlet end of the third acid removing device is connected with the inlet end of the heat exchanger 29. The low-temperature tail gas washed by the washing tower 18 enters the heat exchanger 29, exchanges heat with the high-temperature tail gas outside the heat exchanger 29 to increase the temperature of the tail gas, the outlet end of the heat exchanger 29 is connected with the flue gas tower 16, the temperature of the discharged tail gas is higher, and the phenomenon of white smoke can not be formed in dissipation;

the heat exchanger 29 comprises annular bottom pipes 291 and top pipes 293, the bottom pipes 291 are communicated with the top pipes 293 through a plurality of heat exchange pipes 292, the bottom pipes 291 are communicated with a pipeline at the top of the washing tower 18, the top pipes 293 are communicated with the flue gas tower 16, low-temperature tail gas flows into the bottom pipes 291 and then is guided out to the top pipes 293 through the heat exchange pipes 292, and the low-temperature tail gas can be fully contacted with high-temperature tail gas due to the fact that the number of the heat exchange pipes 292 is large and the cross section is small, and the temperature of the low-temperature tail gas is increased.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. A hazardous waste incineration disposal system, characterized in that: comprises a feeding incineration system and a tail gas treatment system;

the feeding incineration system comprises a garbage feeding device, a rotary kiln (5) and a secondary combustion chamber (6) which are connected in sequence;

the tail gas treatment system comprises a boiler (8), a quenching acid removal tower (7), a dry reactor (23), a bag-type dust collector (22), a heater (17) and a flue gas tower (16) which are sequentially connected through a pipeline, wherein denitration treatment equipment is communicated with the boiler (8), first acid removal equipment is communicated with the upper end of the quenching acid removal tower (7), second acid removal equipment is communicated with the lower portion of the dry reactor (23), a heat exchanger (29) is arranged in the heater (17), the lower end of the heater (17) is connected with third acid removal equipment, the gas outlet end of the third acid removal equipment is connected with the inlet end of the heat exchanger (29), and the outlet end of the heat exchanger (29) is connected with the flue gas tower (16).

2. A hazardous waste incineration disposal system according to claim 1, wherein: garbage feed arrangement includes garbage can (1) and feeder hopper (2), the exit of garbage can (1) below is equipped with board feeding machine (26), the other end that garbage can (1) was kept away from in board feeding machine (26) extends to the top of feeder hopper (2), the lower part of feeder hopper (2) is equipped with twice flashboard (3), the below of feeder hopper (2) is equipped with push rod (4), the one end of push rod (4) extends to rotary kiln (5) department, the left side of rotary kiln (5) still communicates diesel tank (24).

3. A hazardous waste incineration disposal system according to claim 2, wherein: the rotary kiln (5) is also connected with a main combustion fan (27) and a combustion fan (28).

4. A hazardous waste incineration disposal system according to claim 1, wherein: a slag conveyor (10) is arranged below the secondary combustion chamber (6).

5. A hazardous waste incineration disposal system according to claim 1, wherein: the denitration device comprises a urea solution tank (11) and a urea stirring tank (12) which are connected through a pipeline, and the liquid outlet end of the urea solution tank (11) is connected with the upper part of the boiler (8) through a pipeline.

6. A hazardous waste incineration disposal system according to claim 1, wherein: the first deacidification equipment comprises a lime stirring tank (14) and a lime solution tank (15) which are connected through a pipeline, a plurality of lime slurry spray guns (72) are arranged at the upper part of the quenching deacidification tower (7), and the liquid outlet end of the lime solution tank (15) is connected with the lime slurry spray guns (72).

7. A hazardous waste incineration disposal system according to claim 1, wherein: the second acid removal equipment comprises a baking soda tank (9) and an activated carbon tank (25), and the baking soda tank (9) and the activated carbon tank (25) are communicated with the lower part of the dry reactor (23) through pipelines.

8. A hazardous waste incineration disposal system according to claim 1, wherein: the third acid removing equipment comprises a washing tower (18), a waste liquid tank (19) and an alkali liquid tank (20), wherein the waste liquid tank (19) and the alkali liquid tank (20) are connected with the washing tower (18) through pipelines, and the upper part of the washing tower (18) is connected with a heat exchanger (29).

9. A hazardous waste incineration disposal system according to claim 1, wherein: the heat exchanger (29) comprises an annular bottom pipe (291) and an annular top pipe (293), the bottom pipe (291) is communicated with the top pipe (293) through a plurality of heat exchange pipes (292), the bottom pipe (291) is communicated with a pipeline at the top of the washing tower (18), and the top pipe (293) is communicated with the flue gas tower (16).

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