CN211676960U

CN211676960U - Town rubbish pyrolysis gasification gas cleaning processing system

Info

Publication number: CN211676960U
Application number: CN201922472222.4U
Authority: CN
Inventors: 李家杰; 潘远来; 方银娥
Original assignee: Cnhomeland Environmental Co ltd
Current assignee: Cnhomeland Environmental Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-16
Anticipated expiration: 2029-12-31

Abstract

The utility model belongs to the technical field of urban garbage treatment, in particular to an urban garbage pyrolysis gasification flue gas purification treatment system, which comprises a cyclone dust collector, a flue gas cooler, a sawdust oil removal tank, a main fan and a chimney; the cyclone dust collector adopts an axial air inlet layout mode, an exhaust pipe of the cyclone dust collector is communicated with a flue gas inlet of a flue gas cooler, a flue gas outlet of the flue gas cooler is communicated with a tank inlet of a sawdust removing oil tank, a tank outlet of the sawdust removing oil tank is communicated with an air inlet of a main fan, an air outlet of the main fan is communicated with a chimney inlet, and a chimney outlet is communicated with the atmosphere. The atmospheric pollutant emission concentration after town rubbish pyrolysis gasification gas cleaning processing system handles all reaches national standard, but wide application is in various types of town rubbish pyrolysis gasification equipment's gas cleaning handles.

Description

Town rubbish pyrolysis gasification gas cleaning processing system

Technical Field

The utility model belongs to the technical field of town refuse treatment, concretely relates to town refuse pyrolysis gasification gas cleaning processing system.

Background

The incineration method is increasingly widely applied as an effective volume reduction and decrement garbage treatment means. However, the waste inevitably produces secondary pollution in the incineration process, including dioxin-like substances, hydrogen sulfide, hydrogen chloride, fly ash and the like which are extremely harmful to the environment. These contaminants have a great impact on the environment and can also be harmful to humans. Therefore, the problem that secondary pollutants generated in the waste incineration process are a great problem of waste treatment is solved.

Disclosure of Invention

To the not enough of above-mentioned cities and towns rubbish pyrolysis gasification gas cleaning treatment current situation and technique, the utility model provides a cities and towns rubbish pyrolysis gasification gas cleaning processing system, its area is little, the operation is simple, the treatment effect is good, but wide application is handled in cities and towns rubbish pyrolysis gasification gas cleaning.

In order to realize the technical purpose, the utility model provides a following technical scheme:

a town refuse pyrolysis gasification flue gas purification treatment system comprises a cyclone dust collector, a flue gas cooler, a sawdust oil removal tank, a main fan and a chimney; the cyclone dust collector adopts an axial air inlet layout mode, an exhaust pipe of the cyclone dust collector is communicated with a flue gas inlet of the flue gas cooler, and the cyclone dust collector can effectively separate solid and liquid particles from air flow; the smoke outlet of the smoke cooler is communicated with the box inlet of the sawdust oil removing box, and the smoke cooler is used for cooling treatment before the sawdust oil removing box, cooling and exchanging heat for smoke, and is beneficial to removing heavy metals in the smoke; the box outlet of the wood chip oil removing box is communicated with the air inlet of the main fan, the wood chip oil removing box can adsorb a large amount of tar and dust, and the filtering efficiency of the wood chip oil removing box on the tar is higher than that of a common electrostatic oil remover; and the air outlet of the main fan is communicated with the chimney inlet, and the chimney outlet is communicated with the atmosphere.

As the utility model provides an improvement of flue gas purification processing system, cyclone is stainless steel's cyclone, and stainless steel material is high temperature resistant, wear-resisting corrosion and corruption, through the cyclone of stainless steel material structure, can operate under the temperature is up to 1000 ℃ of the condition. The cyclone dust collector makes the dust-containing airflow rotate, separates dust particles from the airflow by means of centrifugal force and collects the dust particles on the wall of the cyclone dust collector, and then makes the dust particles fall into the dust hopper by means of gravity. The cyclone dust collector has the advantages of simple structure, easy manufacture, installation, maintenance and management, low equipment investment and operation cost, and capability of effectively separating solid and liquid particles from the airflow.

As the utility model provides an improvement of flue gas purification processing system, a plurality of saw-dust filter plates have set gradually along the gas flow direction in the saw-dust deoiling case.

As the utility model provides a flue gas purification processing system's an improvement, the saw-dust filter plate through cage demountable installation in the saw-dust deoiling case, the manual work of being convenient for carries out the periodic replacement and filters. The sawdust filter plate adopts an integral design, is convenient to replace and send to a gasification furnace for pyrolysis treatment, does not produce secondary pollution, is convenient and environment-friendly, can save cost and improve the operation efficiency.

As the utility model provides an improvement of flue gas purification processing system, the main air fan is centrifugal draught fan. Preferably, the air volume of the induced draft fan is added with 15-30% of the allowance according to the maximum calculated air volume, and the air pressure allowance is 10-20% (whether the expression is accurate or not).

As the utility model provides an improvement of flue gas purification processing system, the chimney is three pipe bunches of formula chimneys.

As the utility model provides an improvement of flue gas purification processing system, three tub of bunched chimney outsourcing have reinforced concrete structure.

As an improvement of the flue gas purification treatment system provided by the utility model, the flue gas flow velocity at the outlet of the chimney is 10-20 m/s. In the concrete implementation, the diameter and the height of the chimney are determined according to the smoke amount and the discharge amount of smoke dust and harmful gas,

compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a pair of town rubbish pyrolysis gasification gas cleaning processing system, it removes oil tank, main fan and chimney including cyclone, flue gas cooler, saw-dust that communicate in proper order. The system has the advantages of small occupied area, simple operation and good treatment effect, and can be widely applied to the purification treatment of the pyrolysis gasification flue gas of the urban garbage.

The flue gas that the gasification of waste pyrolysis that the technology was handled produced, each atmospheric pollutants emission concentration all reach "domestic waste burns pollution control standard" (GB 18485-2014), and the control standard of individual index like nitrogen oxide, sulfur dioxide, hydrogen chloride reaches EU 2000 level.

Drawings

FIG. 1 is a schematic plan view of the flue gas purification treatment system of the present invention;

FIG. 2 is a schematic view of a cyclone dust collector in the flue gas purification treatment system of the present invention;

FIG. 3 is a schematic view of a wood chip oil removing tank in the flue gas purification treatment system of the present invention;

fig. 4 is a process flow diagram of the present invention.

Wherein, 1 is a cyclone dust collector, 2 is a flue gas cooler, 3 is a wood chip oil removing tank, 4 is a main fan, and 5 is a chimney.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. The described embodiments are only some, not all embodiments of the invention.

As shown in fig. 1-4, a system for purifying and treating town refuse pyrolysis gasification flue gas comprises a cyclone dust collector 1 for cyclone dust collection, a flue gas cooler 2 for cooling the flue gas after dust collection, a wood chip oil removal tank 3 for removing wood chips from the cooled flue gas, a main fan 4 for providing a flue gas flow power source, and a chimney 5 for discharging the flue gas reaching the standard emission standard to the atmospheric environment. The cyclone dust collector adopts an axial air inlet layout mode, an exhaust pipe 13 of the cyclone dust collector is communicated with a flue gas inlet of the flue gas cooler, and the cyclone dust collector can effectively separate solid and liquid particles from air flow; the smoke outlet of the smoke cooler is communicated with the box inlet 31 of the wood chip oil removing box, and the smoke cooler is used for cooling treatment before the wood chip oil removing box, so that the smoke is cooled and subjected to heat exchange, and heavy metals in the smoke are removed; the box outlet 33 of the wood chip oil removing box is communicated with the air inlet of the main fan, the wood chip oil removing box can adsorb a large amount of tar and dust, and the filtering efficiency of the wood chip oil removing box on the tar is higher than that of a common electrostatic oil remover; and the air outlet of the main fan is communicated with the chimney inlet, and the chimney outlet is communicated with the atmosphere.

In particular, the amount of the solvent to be used,

the cyclone dust collector 1 adopts an axial air inlet layout mode, the mechanism still makes dust-containing airflow rotate, dust particles are separated from the airflow by means of centrifugal force and collected on the wall of the dust collector, and then the dust particles fall into the dust hopper 15 by means of gravity. The cyclone dust collector comprises an air inlet pipe 11, an exhaust pipe 13, a cylinder 12, a cone 14 and an ash bucket 15, wherein the air inlet pipe 11 is communicated with the side wall of the cylinder 12, the exhaust pipe 13 is communicated with the top of the cylinder 12, the cone 14 is communicated with the bottom of the cylinder 12, and the ash bucket 15 is positioned at the outlet of the bottom of the cone 14. The cyclone dust collector 1 has simple structure, easy manufacture, installation, maintenance and management, low equipment investment and operation cost, can effectively separate solid and liquid particles from airflow, is made of stainless steel materials with high temperature resistance, abrasion resistance and corrosion resistance, and can be operated at the temperature of 1000 ℃.

The saw-dust removes a plurality of casees 32 that oil tank 3 is preferred including communicating in proper order, a plurality of large tracts of land saw-dust filter plates 34 have been arranged along flue gas flow direction in every case 32, saw-dust filter plate 34 supports and fixes with corresponding cage 35, also make things convenient for the dismouting, the flue gas gets into this saw-dust and removes the oil tank after, the big saw-dust filter plate 34 in flow entering cross-section, the flue gas velocity of flow that comes in greatly reduces suddenly, tar and partial dust that the flue gas carried can gather in saw-dust filter plate 34 surface and inside gap through saw-dust filter plate 34 filtration. Because the sawdust filter plate 34 adopts the integral design, the sawdust filter plate is convenient to replace and send to a gasification furnace for pyrolysis treatment after being used, does not produce secondary pollution, is convenient and environment-friendly, can save the cost by recycling, and can improve the operation efficiency.

It can be understood that the side plates and/or the top plate of the box chamber 32 are provided with through holes 36 for inserting or extracting the cage 35 with the sawdust filter plate, but not limited thereto; preferably, the large area of the wood chip filter plates is understood to be 70-90% of the vertical cross-sectional area of the box chamber 32 along the flow direction of the flue gas, further, the central axes of the adjacent wood chip filter plates can be at the same horizontal height or staggered, and a guide plate is arranged in the box inlet 31 to guide the entering flue gas to the wood chip filter plates in a concentrated manner; more preferably, the side of the cage 35 contacting the through hole 36 is provided with a sealing gasket 37 to prevent the smoke from leaking out.

The main fan 4 is a centrifugal induced fan, the air volume of the induced fan is added with 15-30% of the allowance according to the maximum calculated air volume, and the air pressure allowance is 10-20%.

The chimney 5 is a three-pipe cluster type chimney, and preferably, a reinforced concrete structure is wrapped outside the chimney. The diameter and height of the chimney are determined according to the amount of flue gas and the discharge amount of smoke dust and harmful gas, and the flow velocity of the flue gas at the outlet of the chimney is generally 10-20 m/s.

The above embodiments are merely examples of the present invention, and any person skilled in the art may apply the present invention with modifications, changes, substitutions and variations, without departing from the scope of the claims and without limiting the scope of the present invention.

Claims

1. A town refuse pyrolysis gasification flue gas purification treatment system is characterized by comprising a cyclone dust collector, a flue gas cooler, a wood chip oil removal tank, a main fan and a chimney; the cyclone dust collector adopts an axial air inlet layout mode, an exhaust pipe of the cyclone dust collector is communicated with a flue gas inlet of a flue gas cooler, a flue gas outlet of the flue gas cooler is communicated with a tank inlet of a sawdust removing oil tank, a tank outlet of the sawdust removing oil tank is communicated with an air inlet of a main fan, an air outlet of the main fan is communicated with a chimney inlet, and a chimney outlet is communicated with the atmosphere.

2. The flue gas purification treatment system of claim 1, wherein the cyclone is a stainless steel cyclone.

3. The flue gas purification treatment system according to claim 1, wherein a plurality of sawdust filter plates are sequentially arranged in the sawdust oil tank along the gas flow direction.

4. The flue gas purification treatment system according to claim 3, wherein the wood chip filter plate is detachably mounted in the wood chip oil removal tank through a cage.

5. The flue gas purification treatment system of claim 1, wherein the main fan is a centrifugal induced draft fan.

6. The flue gas purification treatment system according to claim 1, wherein the chimney is a three-tube cluster chimney.

7. The flue gas purification treatment system of claim 6, wherein the three-tube bundled chimney is wrapped by a reinforced concrete structure.

8. The flue gas purification treatment system according to claim 6 or 7, wherein the flue gas flow velocity at the outlet of the chimney is 10-20 m/s.