CN210601629U

CN210601629U - Garbage pyrolysis tail gas secondary combustion and treatment device

Info

Publication number: CN210601629U
Application number: CN201921582477.XU
Authority: CN
Inventors: 李观德
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-22
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a rubbish pyrolysis tail gas postcombustion and processing apparatus, inside is separated for the post combustion furnace (6) of the passageway of buckling by a plurality of vertical baffles, and post combustion furnace (6) one end is equipped with the tail gas entry, and the other end passes through rapid cooling heat exchanger (7) and links to each other with tail gas processing unit. The utility model discloses not only can improve the utilization ratio of rubbish pyrolysis tail gas, can carry out effectual processing to tail gas moreover, reach the requirement that the environmental protection discharged.

Description

Garbage pyrolysis tail gas secondary combustion and treatment device

Technical Field

The utility model relates to a rubbish pyrolysis tail gas postcombustion and processing apparatus belongs to rubbish environmental protection processing technology field.

Background

Garbage is a renewable resource, and if the garbage can be effectively integrated and utilized, huge economic benefits can be created. The existing landfill mode can dispose the garbage, but has the problems of land resource consumption, soil water body pollution and the like. Yet another common form of disposal is incineration. However, since the waste generally has the problems of high humidity, complex components and the like, the general incineration treatment mode is not easy to completely burn and is easy to generate toxic and harmful gases (dust, sulfur-containing pollutants, nitrate pollutants, dioxin and the like), and fuel needs to be added to initiate combustion of the waste, so that extra energy consumption and pollutant generation are caused. The garbage pyrolysis gas is obtained by heating and distilling organic matters in garbage by utilizing the thermal instability of the organic matters in the garbage, so that the organic matters are cracked.

The tail gas generated by the pyrolysis of the garbage generally contains some combustible gases and some harmful gases, and how to effectively utilize and treat the tail gas is the key of the current pyrolysis technology. At present, most of the adopted condensation methods are used for recovering combustible gas generated by pyrolysis, but the condensation recovery efficiency is not particularly high because the organic matter content in the garbage is not particularly stable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rubbish pyrolysis tail gas postcombustion and processing apparatus. The waste pyrolysis tail gas treatment device can improve the utilization rate of waste pyrolysis tail gas, can effectively treat the tail gas and meets the requirement of environment-friendly emission.

The technical scheme of the utility model: garbage pyrolysis tail gas postcombustion and processing apparatus, its characteristics are: the secondary combustion furnace is characterized by comprising a secondary combustion furnace, wherein the secondary combustion furnace is internally divided into a bending channel by a plurality of vertical partition plates, one end of the secondary combustion furnace is provided with a tail gas inlet, and the other end of the secondary combustion furnace is connected with a tail gas treatment unit through a quenching heat exchanger. The secondary combustion furnace is internally provided with a plurality of vertical channels, the structure is not easy to block due to ash deposition, and ash can be conveniently cleaned only by arranging an ash outlet at the bottom of the secondary combustion furnace.

In the secondary combustion and treatment device for garbage pyrolysis tail gas, the tail gas treatment unit comprises a bag-type dust remover, an active carbon absorption tower, a desulfurization spray tower, a smoke exhaust fan and a chimney which are connected in sequence.

In the garbage pyrolysis tail gas secondary combustion and treatment device, the front end of the bag-type dust collector is further provided with a mixing absorption tower, a flue gas inlet of the mixing absorption tower is connected with a mixing storage bin, lime powder and/or activated carbon powder are/is arranged in the mixing storage bin, and a feeding mechanism for feeding the mixing material into the mixing absorption tower is arranged on the mixing storage bin.

In the secondary combustion and treatment device for the pyrolysis tail gas of the garbage, the secondary combustion furnace is connected with an auxiliary combustion furnace, and for the garbage with low organic matter content (low calorific value), a high calorific value material (such as waste wood chips) needs to be arranged in the auxiliary combustion furnace for pyrolysis, so that combustible gas is supplemented in the secondary combustion furnace to achieve a high secondary combustion temperature.

In the garbage pyrolysis tail gas secondary combustion and treatment device, a spray header (spraying urea liquid to remove nitrogen oxides) is arranged in the secondary combustion furnace, and the spray header is positioned at the lower side of a final-section channel of the secondary combustion furnace to prevent the secondary combustion furnace from being cooled too much.

Compared with the prior art, the utility model discloses a mode of postcombustion carries out abundant burning with pyrolysis tail gas to gather with the rapid cooling heat exchanger, turn into heat energy with the energy, be used for follow-up electricity generation or mill's hot water/steam supply, consequently can maximize pyrolysis tail gas's utilization ratio, not influenced by rubbish organic matter content. Furthermore, the utility model discloses still through a series of tail gas processing apparatus, can carry out further purification treatment to the tail gas that the postcombustion produced, can reach the emission requirement well.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The labels in the figures are: 6-secondary combustion furnace, 601-spray header, 4-auxiliary combustion chamber, 7-quenching heat exchanger, 801-mixed material storage bin, 802-mixed absorption tower, 803-bag dust remover, 804-activated carbon absorption tower, 805-desulfurization spray tower, 806-smoke exhaust fan and 807-chimney.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Examples are given. The utility model provides a rubbish pyrolysis tail gas postcombustion and processing apparatus, as shown in figure 1, includes that inside is separated for the postcombustion furnace 6 of buckling the passageway by a plurality of vertical baffles, and postcombustion furnace 6 one end is equipped with the tail gas entry, and the other end passes through rapid cooling heat exchanger 7 and links to each other with tail gas processing unit.

The tail gas treatment unit comprises a bag-type dust collector 803, an active carbon absorption layer arranged on an active carbon absorption tower 804, a desulfurization spray tower 805 for spraying medicaments such as sodium hydroxide, a smoke exhaust fan 806 and a chimney 807 which are sequentially connected. The front end of the bag-type dust collector 803 is also provided with a mixing absorption tower 802, a flue gas inlet of the mixing absorption tower 802 is connected with a mixing storage bin 801, lime powder and/or activated carbon powder are/is arranged in the mixing storage bin 801, and a feeding mechanism for feeding the mixed materials into the mixing absorption tower is arranged on the mixing storage bin 801.

The secondary combustion furnace 6 is connected with an auxiliary combustion furnace 4. The secondary combustion furnace 6 is internally provided with a spray header 601, and the spray header 601 is positioned at the lower side of the final passage of the secondary combustion furnace 6.

The utility model discloses a theory of operation:

tail gas generated by garbage pyrolysis enters a secondary combustion furnace for high-temperature secondary combustion, and the combustion temperature is controlled by oxygen inlet amount and an auxiliary combustion furnace 4. Spraying urea solution at the tail end of the secondary combustion furnace to treat nitrogen oxides, and then sequentially performing the processes of dust removal, adsorption, desulfurization and the like.

Claims

1. Garbage pyrolysis tail gas postcombustion and processing apparatus, its characterized in that: the device comprises a secondary combustion furnace (6) with the interior divided into a bending channel by a plurality of vertical clapboards, wherein one end of the secondary combustion furnace (6) is provided with a tail gas inlet, and the other end of the secondary combustion furnace is connected with a tail gas treatment unit through a quenching heat exchanger (7).

2. The garbage pyrolysis tail gas secondary combustion and treatment device according to claim 1, characterized in that: the tail gas treatment unit comprises a bag-type dust collector (803), an activated carbon absorption tower (804), a desulfurization spray tower (805), a smoke exhaust fan (806) and a chimney (807) which are connected in sequence.

3. The garbage pyrolysis tail gas secondary combustion and treatment device according to claim 2, characterized in that: the front end of the bag-type dust collector (803) is also provided with a mixing absorption tower (802), a flue gas inlet of the mixing absorption tower (802) is connected with a mixing storage bin (801), lime powder and/or activated carbon powder are arranged in the mixing storage bin (801), and a feeding mechanism for feeding the mixed material into the mixing absorption tower is arranged on the mixing storage bin (801).

4. The garbage pyrolysis tail gas secondary combustion and treatment device according to claim 1, characterized in that: and the secondary combustion furnace (6) is connected with an auxiliary combustion furnace (4).

5. The garbage pyrolysis tail gas secondary combustion and treatment device according to claim 1, characterized in that: and a spray header (601) is arranged in the secondary combustion furnace (6), and the spray header (601) is positioned at the lower side of the final section channel of the secondary combustion furnace (6).