CN206521430U - A kind of heat accumulating type refuse pyrolysis processing system - Google Patents
A kind of heat accumulating type refuse pyrolysis processing system Download PDFInfo
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- CN206521430U CN206521430U CN201621384180.9U CN201621384180U CN206521430U CN 206521430 U CN206521430 U CN 206521430U CN 201621384180 U CN201621384180 U CN 201621384180U CN 206521430 U CN206521430 U CN 206521430U
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 219
- 238000012545 processing Methods 0.000 title abstract description 5
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- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 205
- 239000003546 flue gas Substances 0.000 claims description 79
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 78
- 238000000746 purification Methods 0.000 claims description 42
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- 230000009977 dual effect Effects 0.000 claims description 3
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- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
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Abstract
The utility model belongs to junk-free treatment technology, and in particular to a kind of heat accumulating type refuse pyrolysis processing system.For the above-mentioned problems in the prior art, the utility model proposes a kind of heat accumulating type refuse pyrolysis processing system, including：Chain-and-slat drying machine, hopper and heat storage type pyrolysis reactor, the hopper are connected with the chain-and-slat drying machine.The utility model is different from that other costs are too high or technology of garbage disposal of complex process, heating source is used as by the use of built-in heat accumulation type radiant tube, pass through the reasonable Arrangement to accumulation of heat radiant tube, realize temperature of reactor rationally to control, and the design of radiant tube can be simplified, reduction cost of investment is produced Wu bioxin, environmental protection, with reference to the comprehensive utilization of rubbish accessory substance, reaches to junk-free and effective recycling treatment.Meanwhile, continuous charring process is realized, technique is simple, and production efficiency is higher, reduces production cost.
Description
Technical Field
The utility model belongs to rubbish cleaning technique, concretely relates to heat accumulation formula rubbish pyrolytic processing system.
Background
China has huge annual garbage yield, and particularly, a large city has a garbage enclosing city. The treatment mode of the garbage mainly comprises landfill and incineration treatment, and because the landfill needs to occupy a large amount of land and secondary pollution is brought to underground water and soil, garbage incineration power generation treatment is selected in many cities. However, the generation of dioxin in the incineration process can be controlled only at great expense in the process of generating power by incinerating garbage. Because dioxin is a strong carcinogen, many municipal waste incineration projects bring great uneasiness to surrounding residents at present, and a great deal of wandering and counseling are caused.
The garbage pyrolysis treatment technology is called as a third-generation garbage treatment technology, has the characteristic of air isolation treatment, so that the generation of dioxin is inhibited in the mechanism, and the garbage pyrolysis treatment technology is an advanced and clean garbage treatment technology. Due to the fact that waste pyrolysis needs to consume large energy, many pyrolysis treatment processes have the problems of high cost or complex process at present. Therefore, the development of a garbage treatment technology with simple process and low cost has great significance for realizing effective and low-investment garbage treatment.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model provides a heat accumulation formula rubbish pyrolysis treatment system, be different from the rubbish processing technology that other costs are too high or the technology is complicated, utilize built-in heat accumulation formula radiant tube as the heating source, through the rational arrangement to the heat accumulation radiant tube, realized reactor temperature rational control to can simplify the design of radiant tube, reduce investment cost, no dioxin produces, green combines the comprehensive utilization of rubbish accessory substance, reach to rubbish cleanness and effectual resourceful treatment. Meanwhile, the continuous carbonization process is realized, the process is simple, the production efficiency is higher, and the production cost is reduced.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a heat accumulating type garbage pyrolysis treatment system is characterized by comprising:
a chain slat type dryer;
the hopper is connected with the chain plate type dryer;
a regenerative pyrolysis reactor comprising: a pyrolysis chamber, a double heat accumulating type radiant tube system, a feed inlet, a tar inlet, a discharge outlet and a pyrolysis gas outlet system, wherein,
the dual regenerative radiant tube system comprises: a radiant tube, a heat accumulator, an air fan, a flue gas fan, an air pipeline, a flue gas pipeline, a gas burner and a reversing valve,
the pyrolysis gas outlet system comprises: the pyrolysis reactor comprises a plurality of pyrolysis gas outlets, a pipeline and a pyrolysis gas outlet, wherein the pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and positioned between two adjacent layers of radiant tubes, the pipeline is used for connecting the pyrolysis gas outlets, the pyrolysis gas outlet is positioned on the side part below the pyrolysis reactor, and the lower end of the pipeline is connected with the pyrolysis gas outlet; wherein,
the radiant tubes are arranged in the pyrolysis chamber in a multi-layer mode along the height direction of the heat accumulating type pyrolysis reactor, each layer is provided with a plurality of radiant tubes arranged along the horizontal direction, and two ends of each radiant tube are fixedly connected with the side wall of the pyrolysis chamber respectively;
the heat accumulator is arranged on the outer wall of the heat accumulating type pyrolysis reactor in a bilateral symmetry mode, and the center of the heat accumulator is provided with the gas burner for burning introduced gas and air to generate flue gas;
a closed channel is formed between the outer wall of the heat accumulating type pyrolysis reactor and the side wall of the pyrolysis chamber, is communicated with the radiation pipe and the gas burner and is used for introducing flue gas generated by combustion of the gas burner into the radiation pipe and enabling the flue gas to directly heat the pyrolysis chamber through the side wall of the pyrolysis chamber;
the air fan and the flue gas fan are respectively connected with the reversing valve through the air pipeline and the flue gas pipeline, the reversing valve and the flue gas pipeline are respectively connected with the gas burner, and the flue gas fan is connected with the chain plate type dryer and used for sending flue gas discharged by the heat accumulating type pyrolysis reactor into the chain plate type dryer as a drying heat source;
the semicoke gasification furnace is respectively connected with the discharge port of the pyrolysis reactor and the purification system and is used for gasifying the pyrolysis semicoke and sending combustible gas generated by gasification into the purification system through a gas pipe;
the condensation air-blast system is arranged between the heat accumulating type pyrolysis reactor and the purification system, an inlet of the condensation air-blast system is connected with the pyrolysis gas guide outlet, an outlet of the condensation air-blast system is respectively connected with a tar inlet at the top of the pyrolysis reactor and the purification system, and the condensation air-blast system is used for carrying out condensation air-blast treatment on pyrolysis gas generated by the pyrolysis reactor, wherein the obtained combustible gas is sent into the purification system, and the obtained tar enters the pyrolysis reactor through the tar inlet to react;
the purification system is respectively connected with the semicoke gasification furnace, the gas generator set, the condensation air-blast system and the gas burner and is used for purifying the combustible gas generated by the semicoke gasification furnace and the condensation air-blast system and then sending the purified combustible gas into the gas burner and the gas generator set;
and the gas generator set is connected with the purification system and used for generating the purified gas generated by the purification system.
The inventor discovers that the utility model provides a heat accumulation formula rubbish pyrolysis treatment system and method thereof, be different from other too high-cost or the complicated refuse treatment technique of technology, utilize built-in heat accumulation formula radiant tube as the heating source, through the rational arrangement to the heat accumulation radiant tube, realized reactor temperature rational control to can simplify the design of radiant tube, reduce investment cost, and no dioxin produces, green combines the comprehensive utilization of rubbish accessory substance, reach to rubbish cleanness and effectual resourceful treatment. Meanwhile, the continuous carbonization process is realized, the process is simple, the production efficiency is higher, and the production cost is reduced.
According to the specific embodiment of the utility model, the heat accumulating type pyrolysis reactor is of a vertical furnace structure.
According to the utility model discloses a specific embodiment, the heat accumulator is followed heat accumulation formula pyrolysis reactor's direction of height multilayer arrangement, and every layer includes bilateral symmetry's being located two heat accumulators at radiant tube both ends.
According to a specific embodiment of the present invention, the reversing valve is connected to the gas burner via an air/flue gas line; one end of the gas pipe is connected with a combustible gas outlet of the semicoke gasification furnace, and the other end of the gas pipe is connected with the purification system; one end of the gas pipeline is connected with the purification system, and the other end of the gas pipeline is connected with the gas burner.
According to the specific embodiment of the utility model, the heat accumulator is ceramic honeycomb body material, and the heat accumulator of every layer provides as the heating source for the radiant tube of 4-8 layers the flue gas.
According to the specific embodiment of the utility model, the switching-over valve according to heat accumulator temperature variation sets up the switching-over time interval, preferably, is 20-150s to make two sides of two heat accumulation formula radiant tube system burn in turn-discharge fume.
According to the utility model discloses a concrete embodiment, the hopper with the feed inlet links to each other, be equipped with semicoke conveyor between discharge gate and the semicoke gasifier.
According to the specific embodiment of the utility model, the gas and the air are burned in the gas burner to generate the high temperature flue gas with the temperature of 600-; after passing through the radiation tube, the temperature of the flue gas is reduced to 900 ℃ and the heat accumulator is heated to 850 ℃ at 500 ℃.
The utility model has the advantages as follows:
the utility model provides a heat accumulation formula rubbish pyrolysis treatment system and method is different from other too high or the complicated refuse treatment technique of technology of cost, utilizes built-in heat accumulation formula radiant tube as the heating source, through the rational arrangement to the heat accumulation radiant tube, has realized the reasonable control of reactor temperature to can simplify the design of radiant tube, reduce investment cost, and no dioxin produces, green combines the comprehensive utilization of rubbish accessory substance, reach the clean and effectual resourceful treatment of rubbish. Meanwhile, the continuous carbonization process is realized, the process is simple, the production efficiency is higher, and the production cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the pyrolysis treatment system of the present invention.
The device comprises a chain plate type dryer 1, a chain plate type dryer 2, a hopper 3, a heat accumulating type pyrolysis reactor 301, a radiant tube 302, a heat accumulator 303, an air fan 304, a flue gas fan 305, a gas burner 306, a reversing valve 307, a pyrolysis gas outlet system 4, a semicoke gasification furnace 5, a condensation air blast system 6, a purification system 7 and a gas generator set.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following specific embodiments. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
According to an aspect of the utility model, the utility model provides a heat accumulation formula rubbish pyrolytic treatment system, as shown in figure 1, include: a chain plate type dryer 1; the hopper 2 is connected with the chain plate type dryer; the regenerative pyrolysis reactor 3 includes: pyrolysis chamber, two heat accumulation formula radiant tube system, feed inlet, tar entry, discharge gate and pyrolysis gas outlet system 307, wherein, two heat accumulation formula radiant tube system include: radiant tubes 301, heat accumulator 302, air fan 303, flue gas fan 304, air pipeline, flue gas pipeline, gas burner 305, switching-over valve 306, pyrolysis gas outlet system includes: the pyrolysis reactor comprises a plurality of pyrolysis gas outlets, a pipeline and a pyrolysis gas outlet, wherein the pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and positioned between two adjacent layers of radiant tubes, the pipeline is used for connecting the pyrolysis gas outlets, the pyrolysis gas outlet is positioned on the side part below the pyrolysis reactor, and the lower end of the pipeline is connected with the pyrolysis gas outlet; the semicoke gasification furnace 4 is respectively connected with the discharge port of the pyrolysis reactor and the purification system, and is used for gasifying the pyrolysis semicoke and sending combustible gas generated by gasification into the purification system through a gas pipe; the condensation air-blast system 5 is arranged between the heat accumulating type pyrolysis reactor and the purification system, an inlet of the condensation air-blast system is connected with the pyrolysis gas guide outlet, and an outlet of the condensation air-blast system is respectively connected with a tar inlet at the top of the pyrolysis reactor and the purification system and is used for carrying out condensation air-blast treatment on the pyrolysis gas generated by the pyrolysis reactor; the purification system 6 is respectively connected with the semicoke gasification furnace, the gas generator set, the condensation air-blast system and the gas burner, and is used for purifying the combustible gas generated by the semicoke gasification furnace and the condensation air-blast system and then sending the purified combustible gas into the gas burner and the gas generator set; and the gas generator set 7 is connected with the purification system and used for generating power by using the purified gas generated by the purification system.
The inventor discovers that the utility model provides a heat accumulation formula rubbish pyrolysis treatment system and method thereof, be different from other too high-cost or the complicated refuse treatment technique of technology, utilize built-in heat accumulation formula radiant tube as the heating source, through the rational arrangement to the heat accumulation radiant tube, realized reactor temperature rational control to can simplify the design of radiant tube, reduce investment cost, and no dioxin produces, green combines the comprehensive utilization of rubbish accessory substance, reach to rubbish cleanness and effectual resourceful treatment. Meanwhile, the continuous carbonization process is realized, the process is simple, the production efficiency is higher, and the production cost is reduced.
According to the utility model discloses a specific embodiment, the heat accumulation formula pyrolysis reactor includes: pyrolysis chamber, two heat accumulation formula radiant tube system, feed inlet, tar entry, discharge gate and pyrolysis gas outlet system, wherein, pyrolysis gas outlet system includes: the pyrolysis reactor comprises a plurality of pyrolysis gas outlets, a pipeline and a pyrolysis gas outlet, wherein the pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and positioned between two adjacent layers of radiant tubes, the pipeline is used for connecting the pyrolysis gas outlets, the pyrolysis gas outlet is positioned on the side part below the pyrolysis reactor, and the lower end of the pipeline is connected with the pyrolysis gas outlet. The utility model discloses a some embodiments, the rubbish raw materials gets into from the feed inlet heat accumulation formula pyrolysis reactor gets into the pyrolysis chamber at raw materials downstream in-process, through the equipartition and the heating back of the radiant tube in the pyrolysis reactor, the rubbish raw materials generate pyrolysis reaction under the atmosphere of isolated air, produce pyrolysis gas and hot semicoke, and the pyrolysis gas of production discharges through pyrolysis gas outlet system and goes, and the hot semicoke of production passes through the discharge gate and discharges. In some embodiments of the present invention, the hopper is connected to the feed inlet for adding the garbage material in the hopper into the heat accumulating type pyrolysis reactor for treatment, and the discharge outlet is connected to the semicoke gasification furnace for discharging the generated hot semicoke into the semicoke gasification furnace through the discharge outlet. Preferably, a semicoke conveying device is arranged between the discharge port and the semicoke gasification furnace, so that semicoke transportation is more efficient.
According to the utility model discloses a specific embodiment, heat accumulation formula pyrolysis reactor, its shape does not receive specific restriction as long as can carry out pyrolysis treatment with rubbish can. In some embodiments of the present invention, the regenerative pyrolysis reactor is of a furnace structure, which may be of a vertical furnace structure or a horizontal furnace structure. Preferably, the regenerative pyrolysis reactor has a vertical furnace structure.
According to the utility model discloses a specific embodiment, two regenerative radiant tube systems include: the device comprises a radiant tube, a heat accumulator, an air fan, a flue gas fan, an air pipeline, a flue gas pipeline, a gas burner and a reversing valve, and is used for heating the heat accumulating type pyrolysis reactor. In some embodiments of the present invention, the heat storage body is disposed outside the periphery of the regenerative pyrolysis reactor, and is used for directly heating the regenerative pyrolysis reactor by passing high-temperature flue gas through the outer wall; the radiant tube is arranged in the heat accumulating type pyrolysis reactor and is used for directly heating the heat accumulating type pyrolysis reactor through the tube wall of the heat accumulating type radiant tube by high-temperature flue gas. Therefore, the double regenerative radiant tube system realizes the high-efficiency regenerative pyrolysis reactor combining external heat and internal heat.
According to the utility model discloses a specific embodiment, the specific setting mode and the quantity of radiant tube are not specifically restricted as long as can heat the heat accumulation formula pyrolysis reactor can. In some embodiments of the present invention, the radiant tubes may be disposed in a plurality of layers along a height direction of the regenerative pyrolysis reactor inside the pyrolysis chamber, the radiant tubes of each layer are disposed along a horizontal direction, and two ends of the radiant tubes are respectively fixedly connected to a sidewall of the pyrolysis chamber; the number of the radiant tubes may be multiple, and preferably, the radiant tubes may be arranged in multiple layers, and the radiant tubes of each layer may have multiple horizontal directions. Thereby, the radiant tube achieves efficient heating thereof from inside the regenerative pyrolysis reactor.
According to the utility model discloses a specific embodiment, the concrete mode of setting, material and the quantity of heat accumulator are not specifically restricted as long as can heat accumulation formula pyrolysis reactor can. In some embodiments of the present invention, the heat storage bodies are symmetrically arranged on the outer wall of the heat storage type pyrolysis reactor, the heat storage bodies are arranged in multiple layers along the height direction of the heat storage type pyrolysis reactor, and the gas burner is arranged in the center of the heat storage body for burning the introduced gas and air to generate flue gas; the heat accumulator is made of a ceramic honeycomb material and has the advantages of large surface per unit volume, good thermal stability, corrosion resistance and the like; the heat accumulators are arranged in a multilayer mode, and each layer comprises two heat accumulators which are positioned at two ends of the radiant tube in bilateral symmetry. Thus, the heat accumulator achieves efficient heating of the regenerative pyrolysis reactor from outside thereof.
According to the utility model discloses a specific embodiment, the radiant tube with the relation of connection of heat accumulator is not specifically restricted as long as can realize efficient heating the heat accumulation formula pyrolysis reactor can. In some embodiments of the present invention, the heat accumulating type pyrolysis reactor outer wall and the side wall of the pyrolysis chamber form a closed channel therebetween, the closed channel is communicated with the radiant tube and the gas burner, and is used for introducing the flue gas generated by the combustion of the gas burner into the radiant tube, and directly heating the flue gas through the side wall of the pyrolysis chamber. Preferably, the heat accumulator of each layer provides the flue gas as a heating source for 4-8 layers of radiant tubes. Thereby, the regenerative pyrolysis reactor with high efficiency of combining external heat and internal heat is realized.
According to the utility model discloses a specific embodiment, the setting mode of two heat accumulation formula radiant tube system's air blower is not specifically restricted as long as can do heat accumulation formula pyrolysis reactor provides the air can. In some embodiments of the present invention, the air blower is connected to the reversing valve, preferably, connected to the reversing valve through an air line.
According to the utility model discloses a specific embodiment, the setting mode of two heat accumulation formula radiant tube system's flue gas fan is not restricted specifically, as long as can be right heat accumulation formula pyrolysis reactor carries out the flue gas transportation can. In some embodiments of the present invention, the flue gas blower is connected to the reversing valve, preferably, the flue gas blower is connected to the reversing valve through a flue gas pipeline; the flue gas fan is connected with the chain plate type dryer and used for sending the flue gas exhausted by the heat accumulating type pyrolysis reactor into the chain plate type dryer to be used as a drying heat source. Therefore, the effective utilization of the flue gas waste heat is realized, and the investment cost is reduced.
According to the utility model discloses a specific embodiment, the mode of setting up and the working method of switching-over valve do not receive specific restriction, as long as can play the effect of switching-over can. In some embodiments of the present invention, the reversing valve is arranged in such a manner that one end is connected to the gas burner through an air/flue gas pipeline, and the other end is connected to a corresponding air/flue gas fan through an air/flue gas pipeline; the working mode of the reversing valve can set a reversing time interval according to the temperature change of the heat accumulator, preferably 20-150s, so that combustion and smoke exhaust are alternately carried out on two sides of the double heat accumulating type radiant tube system.
According to the utility model discloses a specific embodiment, the mode that sets up of gas nozzle is not restricted specifically, as long as can produce the high temperature flue gas can. In some embodiments of the present invention, the gas burner is disposed in the center of the heat storage body; the reversing valve is connected with the gas burner through an air/flue gas pipeline and used for providing air for the gas burner to burn and discharging low-temperature flue gas to the reversing valve; the gas burner is connected with the gas pipeline and used for conveying combustible gas to the gas burner, and further, the gas burner is connected with the purification system through the gas pipeline and used for conveying the purified combustible gas in the purification system to the gas burner to provide fuel.
According to the specific embodiment of the utility model, the gas that clean system provided and the air that the switching-over valve provided burn in the gas nozzle on the left side and produce 600 and cake with sour milk 1000 ℃ high temperature flue gas, high temperature flue gas is through 4-8 the radiant tube gets into provide the pyrolysis reaction required energy as the heating source in the heat accumulation formula pyrolysis reactor, and the flue gas temperature falls to 500 and cake with sour milk 900 degrees centigrade later through the heat accumulator material on the right, falls to below the flue gas temperature 200 ℃ via the flue gas pipeline discharge to the switching-over valve, and the heat accumulator material on the right is heated to 500 and cake with sour milk 850 ℃; the reversing valve sets interval reversing time according to the temperature change of the heat accumulator, the interval reversing time is generally 20-150s, after the reversing valve reverses, the left gas burner stops supplying gas from the purification system, the right gas burner starts supplying gas from the purification system for combustion, air supplied by the reversing valve enters the right heat accumulator material through the original flue gas pipeline, is heated by the heat accumulator, and after the normal temperature air is heated to 500-750 ℃, the air and the gas are mixed in the right gas burner for combustion, and high-temperature flue gas is generated and enters the heat accumulating type pyrolysis reactor through the radiation pipe.
According to the utility model discloses a concrete embodiment, this system still includes condensation air-blast system, condensation air-blast system sets up between heat accumulation formula pyrolysis reactor and the clean system, its entry with pyrolysis gas outlet connection is led, its export respectively with the tar entry at pyrolysis reactor top with clean system connects, be used for with pyrolysis gas that pyrolysis reactor produced carries out the condensation blast air and handles. And further, the obtained combustible gas is sent into a purification system, and the obtained tar enters the pyrolysis reactor through the tar inlet to react. Therefore, the garbage can be cleaned and effectively recycled.
According to the utility model discloses a concrete embodiment, this system still includes clean system, clean system respectively with semicoke gasifier, gas generating set condensation air-blast system with the gas nozzle is connected, be used for with semicoke gasifier with the combustible gas that condensation air-blast system produced sends into after purifying the gas nozzle with gas generating set. Preferably, the purification system and the semicoke gasification furnace are connected through the gas pipe.
According to the utility model discloses a specific embodiment, the particle diameter of rubbish raw materials in this system is not specifically restricted as long as can carry out pyrolysis treatment. In some embodiments of the present invention, the particle size range of the waste material is less than 200mm, which facilitates efficient pyrolysis of the waste material in the regenerative pyrolysis reactor.
According to another aspect of the present invention, the present invention provides a method for performing a regenerative pyrolysis reaction of garbage using the system described above, comprising the steps of:
a. the garbage is crushed and screened and sent into a chain plate type dryer, and the flue gas is introduced into the chain plate type dryer through a flue gas fan to be used as a drying heat source to dry the garbage raw materials. According to the utility model discloses a specific embodiment, the rubbish raw materials is less than 200 mm's rubbish for sorting and broken particle diameter scope, and the flue gas of 150-.
b. The method comprises the following steps that gas and air are combusted in a gas burner at one side to generate high-temperature flue gas, the high-temperature flue gas directly heats a pyrolysis chamber through the side wall of the pyrolysis chamber, and the flue gas is arranged in the pyrolysis chamber through a radiant tube to provide a heat source for pyrolysis reaction; and after passing through the radiant tube, the high-temperature flue gas heats the heat accumulator on the other side, and finally the flue gas is introduced into the chain plate type dryer through the flue gas fan.
According to the utility model discloses a specific embodiment, the gas that clean system provided with the air that the switching-over valve provided burns in the gas nozzle on the left side and produces 600 and supplyes 1000 ℃ high temperature flue gas, the high temperature flue gas is through 4-8 the radiant tube gets into provide the energy that pyrolytic reaction needs as the heating source in the heat accumulation formula pyrolysis reactor, and the flue gas temperature falls to 500 and supplyes 900 degrees centigrade back through the right the heat accumulator material falls to the flue gas temperature and discharges below 200 ℃, and the right the heat accumulator material is heated to 500 and supplyes 850 degrees centigrade, the flue gas process below 200 degrees centigrade of final discharge in the flue gas fan introduces link plate formula drying-machine, carries out drying process to the rubbish raw materials in the link plate formula drying-machine.
c. And the reversing valve sets a reversing time interval according to the temperature change of the heat accumulator, after the reversing valve reverses, the gas burner at one side stops supplying gas, and the burner at the other side starts supplying gas for combustion and generates high-temperature flue gas, so that combustion and exhaust gas are alternately carried out on two sides of the double heat accumulating type radiant pipe system, and a heat source is provided for the pyrolysis reaction.
According to the utility model discloses a specific embodiment, the switching-over valve basis heat accumulator temperature variation has set up interval switching-over time, generally is 20-150s, and after the switching-over valve commutates, the gas nozzle on the left side stops by clean system provides the gas, and the gas nozzle on the right begins by clean system provides the gas and burns, the air that the switching-over valve provided gets into the heat accumulator material on the right through original flue gas pipeline, through the heat accumulator heating, normal atmospheric temperature air heating to 500 supplyes 750 ℃ after, burns in the gas nozzle on the right with the gas mixture, produces the high temperature flue gas and passes through the radiant tube gets into in the heat accumulation formula pyrolytic reaction ware. Therefore, combustion-smoke exhaust gas is alternately carried out on two sides of the double heat accumulating type radiant tube system, and a heat source is provided for pyrolysis reaction.
d. The dried garbage raw materials enter a hopper, are added into a heat accumulating type pyrolysis reactor through a feeding hole, are uniformly distributed and heated through a radiation pipe arranged in the reactor, and are pyrolyzed in a pyrolysis chamber of the pyrolysis reactor to generate pyrolysis gas and hot semicoke; the generated pyrolysis gas is collected through a plurality of pyrolysis gas outlets arranged between the adjacent two layers of the radiant tubes and is led out from a pyrolysis gas outlet at the lower part of the pyrolysis reactor, the generated hot semicoke is discharged into the semicoke gasification furnace through a discharge hole to generate combustible gas, and the combustible gas is sent into a purification system for purification treatment.
According to the utility model discloses a specific embodiment, the heat accumulation formula pyrolysis reactor includes: pyrolysis chamber, two heat accumulation formula radiant tube system, feed inlet, tar entry, discharge gate and pyrolysis gas outlet system, wherein, pyrolysis gas outlet system includes: the pyrolysis reactor comprises a plurality of pyrolysis gas outlets, a pipeline and a pyrolysis gas outlet, wherein the pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and positioned between two adjacent layers of radiant tubes, the pipeline is used for connecting the pyrolysis gas outlets, the pyrolysis gas outlet is positioned on the side part below the pyrolysis reactor, and the lower end of the pipeline is connected with the pyrolysis gas outlet. In some embodiments of the present invention, the garbage material enters the heat accumulating type pyrolysis reactor from the feeding port, and after the uniform distribution and heating of the radiant tube in the pyrolysis reactor, the garbage staying time is 30-400 minutes, and the garbage moves to the discharging port at the lower part of the heat accumulating type pyrolysis reactor to be discharged. In the process of downward movement of the raw materials, the garbage raw materials enter a pyrolysis chamber from a feeding hole, and after being uniformly distributed and heated by a radiation tube in a pyrolysis reactor, the garbage raw materials are subjected to pyrolysis reaction in an air-isolated atmosphere to generate pyrolysis gas and hot semicoke; the temperature of the generated pyrolysis gas is 400-700 ℃, and the generated pyrolysis gas is discharged through a pyrolysis gas outlet system, namely, a plurality of pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and between two adjacent layers of radiation tubes, the pyrolysis gas enters the pyrolysis gas outlets through gaps between materials and the radiation tubes, and then the pyrolysis gas is collected to a pyrolysis gas outlet at the side part below the pyrolysis reactor through a pipeline connected with the plurality of pyrolysis gas outlets and is led out; the temperature range of the generated hot semicoke is 400-750 ℃, and the generated hot semicoke is discharged through a discharge hole. In some embodiments of the present invention, the hopper is connected to the feed inlet for feeding the raw garbage material in the hopper to the regenerative pyrolysis reactor for treatment; the discharge port is connected with the semicoke gasification furnace and used for discharging the generated hot semicoke into the semicoke gasification furnace through the discharge port, air or water vapor is added to gasify the hot semicoke into combustible gas, the combustible gas is discharged into a purification system to be purified to obtain purified combustible gas, and then the purified combustible gas is sent into a gas burner to be used as fuel.
e. The pyrolysis gas enters a condensation air blast system, and tar and combustible gas are obtained in the condensation air blast process; and returning the generated tar to a tar inlet at the top of the pyrolysis reactor, reacting the tar with the raw materials in the pyrolysis reactor, and sending the cooled combustible gas into a purification system for purification treatment.
According to the specific embodiment of the utility model, the temperature drops to 22-30 ℃ after the pyrolysis gas enters the condensation air blast system, and tar and combustible gas are obtained in the condensation air blast process. And returning the generated tar to a tar inlet at the top of the pyrolysis reactor, reacting with the raw materials in the pyrolysis reactor again, and sending the cooled combustible gas into a purification system for purification treatment.
f. And one part of the clean combustible gas generated by the purification system is sent to a gas generator set to generate electricity, and the other part of the clean combustible gas is sent to a gas burner to be used as fuel.
According to the utility model discloses a concrete embodiment, this system still includes clean system, clean system respectively with semicoke gasifier, gas generating set condensation air-blast system with the gas nozzle is connected, be used for with semicoke gasifier with the combustible gas that condensation air-blast system produced sends into after purifying the gas nozzle with gas generating set. In some embodiments of the present invention, the pure combustible gas obtained after removing the impurity gas in the fuel gas is about 25-45% fed into the radiant tube for use as fuel, and the remaining pure combustible gas is fed into the gas generator set for power generation. Through detection, the content of dioxin in the power generation fuel gas is lower than 0.03ng/Nm3The discharge standard (0.1 ng/Nm) for treating dioxin in refuse treatment of European Union3) Less than one third.
The inventor discovers that the utility model provides a heat accumulation formula rubbish pyrolysis treatment system and method thereof, be different from other too high-cost or the complicated refuse treatment technique of technology, utilize built-in heat accumulation formula radiant tube as the heating source, through the rational arrangement to the heat accumulation radiant tube, realized reactor temperature rational control to can simplify the design of radiant tube, reduce investment cost, and no dioxin produces, green combines the comprehensive utilization of rubbish accessory substance, reach to rubbish cleanness and effectual resourceful treatment. Meanwhile, the continuous carbonization process is realized, the process is simple, the production efficiency is higher, and the production cost is reduced.
Example 1
The garbage is treated by a heat accumulating type garbage pyrolysis reaction system, the crushed garbage is sorted to have the particle size range of less than 200mm, the pyrolysis retention time is 60 minutes, and the analysis data, the process operation parameters and the material balance of the garbage are shown in tables 1-3. The biochar yield from table 3 was as high as 45.6%.
Table 1: garbage analysis data
Table 2: operating parameters of the process
Table 3: basic parameter table
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made in the above embodiments by those skilled in the art without departing from the scope of the present invention, and that various changes in the detailed description and applications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A heat accumulating type garbage pyrolysis treatment system is characterized by comprising:
a chain slat type dryer;
the hopper is connected with the chain plate type dryer;
a regenerative pyrolysis reactor comprising: a pyrolysis chamber, a double heat accumulating type radiant tube system, a feed inlet, a tar inlet, a discharge outlet and a pyrolysis gas outlet system, wherein,
the dual regenerative radiant tube system comprises: a radiant tube, a heat accumulator, an air fan, a flue gas fan, an air pipeline, a flue gas pipeline, a gas burner and a reversing valve,
the pyrolysis gas outlet system comprises: the pyrolysis reactor comprises a plurality of pyrolysis gas outlets, a pipeline and a pyrolysis gas outlet, wherein the pyrolysis gas outlets are arranged on the side wall of the pyrolysis chamber and positioned between two adjacent layers of radiant tubes, the pipeline is used for connecting the pyrolysis gas outlets, the pyrolysis gas outlet is positioned on the side part below the pyrolysis reactor, and the lower end of the pipeline is connected with the pyrolysis gas outlet; wherein,
the radiant tubes are arranged in the pyrolysis chamber in a multi-layer mode along the height direction of the heat accumulating type pyrolysis reactor, each layer is provided with a plurality of radiant tubes arranged along the horizontal direction, and two ends of each radiant tube are fixedly connected with the side wall of the pyrolysis chamber respectively;
the heat accumulator is arranged on the outer wall of the heat accumulating type pyrolysis reactor in a bilateral symmetry mode, and the center of the heat accumulator is provided with the gas burner for burning introduced gas and air to generate flue gas;
a closed channel is formed between the outer wall of the heat accumulating type pyrolysis reactor and the side wall of the pyrolysis chamber, is communicated with the radiation pipe and the gas burner and is used for introducing flue gas generated by combustion of the gas burner into the radiation pipe and enabling the flue gas to directly heat the pyrolysis chamber through the side wall of the pyrolysis chamber;
the air fan and the flue gas fan are respectively connected with the reversing valve through the air pipeline and the flue gas pipeline, the reversing valve and the flue gas pipeline are respectively connected with the gas burner, and the flue gas fan is connected with the chain plate type dryer and used for sending flue gas discharged by the heat accumulating type pyrolysis reactor into the chain plate type dryer as a drying heat source;
the semicoke gasification furnace is respectively connected with the discharge port of the pyrolysis reactor and the purification system and is used for gasifying the pyrolysis semicoke and sending combustible gas generated by gasification into the purification system through a gas pipe;
the condensation air-blast system is arranged between the heat accumulating type pyrolysis reactor and the purification system, an inlet of the condensation air-blast system is connected with the pyrolysis gas guide outlet, an outlet of the condensation air-blast system is respectively connected with a tar inlet at the top of the pyrolysis reactor and the purification system, and the condensation air-blast system is used for carrying out condensation air-blast treatment on pyrolysis gas generated by the pyrolysis reactor, wherein the obtained combustible gas is sent into the purification system, and the obtained tar enters the pyrolysis reactor through the tar inlet to react;
the purification system is respectively connected with the semicoke gasification furnace, the gas generator set, the condensation air-blast system and the gas burner and is used for purifying the combustible gas generated by the semicoke gasification furnace and the condensation air-blast system and then sending the purified combustible gas into the gas burner and the gas generator set;
and the gas generator set is connected with the purification system and used for generating the purified gas generated by the purification system.
2. The system of claim 1, wherein the regenerative pyrolysis reactor is of a vertical furnace configuration.
3. The system of claim 2, wherein the heat accumulators are arranged in multiple layers in a height direction of the regenerative pyrolysis reactor, and each layer includes two heat accumulators positioned at both ends of the radiant tube in bilateral symmetry.
4. A system according to any one of claims 1 to 3, wherein the diverter valve is connected to a gas burner via an air/flue gas line; one end of the gas pipe is connected with a combustible gas outlet of the semicoke gasification furnace, and the other end of the gas pipe is connected with the purification system; one end of the gas pipeline is connected with the purification system, and the other end of the gas pipeline is connected with the gas burner.
5. The system of claim 3, wherein the thermal mass is a ceramic honeycomb material, and wherein each layer of thermal mass provides the flue gas as a heating source for 4 to 8 layers of radiant tubes.
6. The system of any of claims 1 to 3, wherein the reversing valve sets a reversing time interval, preferably 20 to 150s, in response to the regenerator temperature change, to allow alternate combustion-flue gas discharge on both sides of the dual storage radiant tube system.
7. The system according to any one of claims 1 to 3, wherein the hopper is connected with the feed port, and a semicoke conveying device is arranged between the discharge port and the semicoke gasification furnace.
8. The system of any one of claims 1-3, wherein gas and air are combusted in the gas burner to produce high temperature flue gas at 600-; after passing through the radiation tube, the temperature of the flue gas is reduced to 900 ℃ and the heat accumulator is heated to 850 ℃ at 500 ℃.
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