CN214406069U

CN214406069U - Flue gas inner loop domestic waste pyrolysis oven

Info

Publication number: CN214406069U
Application number: CN202023273544.5U
Authority: CN
Inventors: 黄成珊
Original assignee: Guangxi Fengxiangbiao Environmental Protection Technology Co ltd
Current assignee: Guangxi Fengxiangbiao Environmental Protection Technology Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-15
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a flue gas internal circulation household garbage pyrolysis furnace, which comprises a furnace body, and further comprises a feed inlet, a smoke outlet, an ash chamber, a pyrolysis chamber and a fire grate, wherein the feed inlet is arranged at the lower part of the furnace body, the smoke outlet is arranged at the upper part of the furnace body, and the ash outlet is arranged at the lower part of the furnace body; the furnace body is layered by the fire grate, an ash chamber is arranged below the fire grate, and an ash outlet is connected with the ash chamber; a pyrolysis chamber is arranged above the grate, and a feeding hole is connected with the pyrolysis chamber. The secondary combustion chamber is positioned above the pyrolysis chamber. The utility model discloses a flue gas inner loop's structure is realized handling steadily, reliably, continuity ground, innoxious to domestic waste, makes the volume reduction of rubbish reach more than 80%, effectively solves present town and country domestic waste treatment facility and builds and can not use or can not use the dilemma.

Description

Flue gas inner loop domestic waste pyrolysis oven

Technical Field

The utility model relates to a refuse treatment technical field, especially a flue gas inner loop domestic waste pyrolysis oven.

Technical Field

At present, the domestic garbage is continuously increased, the problem of environmental pollution is particularly prominent, the development direction and the technical route of garbage disposal are increasingly concerned, and the domestic garbage disposal becomes one of the most troublesome problems faced by the government. According to investigation, statistics and analysis of relevant departments, the standard reaching rate of municipal solid waste harmless treatment facilities in China is about 25%, and the actual harmless treatment rate is less than 20% by considering factors such as operation management and the like. The garbage pollutes the environment and harms the masses (especially farmers). Particularly in counties and cities, due to the fact that the land is vast and sparse, domestic garbage is extremely scattered, the landform and the landform of each land are complex, traffic is inconvenient, and domestic garbage collection and transportation are greatly restricted; secondly, the total amount of domestic garbage generally generated in county and city places is not as much as that of cities, and the large-scale domestic garbage incineration power plant cannot be built on the scale of more than 600 tons/day, so that small garbage incineration equipment with 10 tons/day and convenient for the on-site harmless treatment of the domestic garbage is urgently needed to solve the problem that the domestic garbage of more than 2000 county places encloses cities.

At present, nearly 300 incineration plants for harmless treatment of household garbage are built in various places in Guangxi, but most of the incineration plants cannot normally operate and are nearly built to be wastefully abandoned. Or can operate, or only can guarantee to reach the purpose of volume reduction, and the waste gas of production can't guarantee to reach standard, or equipment frequently breaks down, opens and stops. All levels of local governments are very headache, and new incineration process technology and equipment which can completely and stably reach the discharge standard, has low equipment failure rate and is simple to operate are urgently needed to replace.

The existing rural garbage treatment method mainly comprises an incineration method and a landfill method. The rural domestic garbage landfill method only finds simple landfill in a low-lying area without relevant antifouling measures, and generates serious secondary pollution. The incineration method mainly uses a simple incinerator for incineration treatment, flue gas and smoke dust treatment facilities are not in place, and a large amount of smoke dust pollution is generated during incineration. The relatively complex incineration system is not suitable for rural domestic garbage treatment because the solar energy engineering is mostly changed after the relatively complex incineration system is built due to the complex equipment, high equipment failure rate or high operation cost or complex operation.

Therefore, how to treat small urban and rural domestic garbage with less than 10 tons in a stable, reliable, continuous and harmless way daily, the three-waste treatment meets the emission requirement (the standard for controlling the incineration pollution of the domestic garbage GB 18485-2014), the dilemma that the urban and rural domestic garbage treatment facility cannot be built up or used at present is solved, and the method has very practical significance.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a flue gas inner loop domestic waste pyrolysis oven, simple structure can stably, reliably, continuously, harmlessly handle small-size town and country domestic waste below 10 tons daily, reaches the three wastes treatment standard.

According to one aspect of the utility model, the utility model relates to a flue gas internal circulation household garbage pyrolysis furnace, which comprises a furnace body, a feed inlet, a smoke outlet, an ash chamber, a pyrolysis chamber and a fire grate, wherein the feed inlet is arranged at the lower part of the furnace body, the smoke outlet is arranged at the upper part of the furnace body, and the ash outlet is arranged at the lower part of the furnace body; the furnace body is layered by the fire grate, an ash chamber is arranged below the fire grate, and an ash outlet is connected with the ash chamber; a pyrolysis chamber is arranged above the grate, and a feeding hole is connected with the pyrolysis chamber.

According to at least one embodiment of the utility model, the device also comprises a second combustion chamber which is positioned above the pyrolysis chamber and consists of an outer cylinder and an inner cylinder, the upper part of the furnace body is provided with the inner cylinder and the outer cylinder from the center to the outside in sequence, wherein the inner cylinder is of a hollow structure, and the outer wall of the inner cylinder and the inner wall of the outer cylinder form a channel; the edges of the inner cylinder body and the outer cylinder body are of inverted Y-shaped structures.

According to the utility model discloses an at least one embodiment still includes air supply system once, air supply system is connected the installation with the ash chamber once.

According to the utility model discloses an at least one embodiment still includes secondary air supply system, secondary air supply system connects and installs in the pyrolysis chamber top.

According to at least one embodiment of the present invention, the furnace shell of the furnace body is made of carbon steel, and the lining of the furnace body is composed of a heat-insulating layer and a flame-retardant layer.

According to at least one embodiment of the present invention, the grate is a fixed grate and is made of a refractory material.

According to the utility model discloses an at least one embodiment still includes temperature control system, temperature control system is connected with pyrolysis chamber, second combustion chamber respectively.

The utility model discloses a substantive characteristics and progress are:

the utility model discloses a flue gas inner loop domestic waste pyrolysis oven, domestic waste carry out the pyrolysis through the pyrolysis chamber, and the air gets into the ash chamber by an air supply system and preheats and provide the gasification agent to the oxide layer through the grate to keep the temperature of oxide layer on the grate, domestic waste on the oxide layer gasifies the pyrolysis reduction and forms CO₂、CO、CH₄And the smoke dust forms mixed smoke. And then, negative pressure is formed on the pyrolysis layer by utilizing heat flow formed by pyrolysis of the garbage and the wind speed of secondary air supply, the mixed flue gas automatically forms internal circulation high-temperature combustion in the secondary combustion chamber and forms turbulence, the residence time of the flue gas is prolonged, harmful and toxic gas formed in the pyrolysis chamber is decomposed into harmless and non-toxic gas at high temperature, particularly dioxin is effectively decomposed, and the burnt fine dust slides into the pyrolysis chamber through the gravity inertia of gas-solid separation (due to the washing of different wind resistances and different wind speeds) and further falls into an ash chamber for storage.

The utility model discloses a flue gas inner loop's structure is realized handling steadily, reliably, continuity ground, innoxious to domestic waste, makes the volume reduction of rubbish reach more than 80%, effectively solves present town and country domestic waste treatment facility and builds and can not use or can not use the dilemma.

Drawings

Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the operation process according to an embodiment of the present invention.

Part numbers and names in the figures:

the device comprises an ash chamber 1, a primary air supply system 2, a fire grate 3, a pyrolysis chamber 4, a feed inlet 5, a furnace body 6, a secondary air supply system 7, a secondary combustion chamber 8, a temperature control system 9, a smoke outlet 10, an outer cylinder 11, an inner cylinder 12 and an ash outlet 13.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the parts related to the present invention are shown in the drawings.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

In at least one embodiment of the present invention, as shown in fig. 1, the present invention provides a flue gas internal circulation household garbage pyrolysis furnace, which comprises a furnace body 6, and further comprises a feed inlet 5, a smoke outlet 10, an ash outlet 13, an ash chamber 1, a pyrolysis chamber 4, and a fire grate 3, wherein the feed inlet 5 is arranged at the lower part of the furnace body 6, the smoke outlet 10 is arranged at the upper part of the furnace body 6, and the ash outlet 13 is arranged at the lower part of the furnace body 6; the furnace body 6 is layered by the fire grate 3, an ash chamber 1 is arranged below the fire grate 3, and an ash outlet 13 is connected with the ash chamber 1; a pyrolysis chamber 4 is arranged above the grate 3, and a feed inlet 5 is connected with the pyrolysis chamber 4.

The household garbage enters the pyrolysis chamber 4 through the feeding hole 5 for pyrolysis, and the burnt ash enters the ash chamber 1 and can be discharged through the ash outlet 13. The flue gas generated by pyrolysis is discharged through the smoke outlet 10. The grate 3 is used as a combustion bed for pyrolysis of garbage.

According to another embodiment of the present invention, the second combustion chamber 8 is further included, the second combustion chamber 8 is located above the pyrolysis chamber 4, the second combustion chamber 8 is composed of an outer cylinder 11 and an inner cylinder 12, the upper portion of the furnace body 6 is sequentially provided with the inner cylinder 12 and the outer cylinder 11 from the center to the outside, wherein the inner cylinder 12 is a hollow structure, and the outer wall of the inner cylinder 12 and the inner wall of the outer cylinder 11 form a channel; the edges of the inner cylinder body 12 and the outer cylinder body 11 are both of inverted Y-shaped structures.

As shown in fig. 2, the outer cylinder 11 and the inner cylinder 12 form a secondary combustion chamber 8, forming an internal circulation structure. The two combustion chamber 8 is located the top of pyrolysis chamber 4, rubbish forms the negative pressure on the pyrolysis layer at the heat flow that pyrolysis chamber 4 pyrolysis formed and the wind speed of secondary air supply, the mixed flue gas that pyrolysis chamber 4 produced is at the automatic inner loop high temperature burning that forms of two combustion chambers 8 and formation torrent, mixed flue gas dwell time has been prolonged, decompose into harmless nontoxic gas with the harmful toxic gas pyrolysis that pyrolysis chamber 4 formed, especially dioxin obtains effectual decomposition, tiny dust after burning out slides into pyrolysis chamber 4 through gas-solid separation (because of the different and different wind speed of windage erode) gravity inertia, and further fall into ash chamber 1 and store.

Namely, after high-temperature combustion, the mixed flue gas flows from a channel formed by the outer wall of the inner cylinder 12 and the inner wall of the outer cylinder 11, is discharged from the edges of the inner cylinder 12 and the outer cylinder 11, part of the mixed flue gas continuously flows back to the secondary combustion chamber 8 for combustion, part of decomposed flue gas rises and is discharged from the smoke outlet 10, and dust falls to the pyrolysis chamber 4, finally passes through the fire grate 3 and falls into the ash chamber 1.

According to the utility model discloses a still another embodiment, still include air supply system 2 once, air supply system 2 is connected the installation with ash chamber 1 once.

The primary air supply system 2 is used for supplying air to the pyrolysis chamber 4 and supplying air from the ash chamber 1.

According to the utility model discloses a still another embodiment still includes secondary air supply system 7, secondary air supply system 7 is connected and is installed above pyrolysis chamber 4.

And the secondary air supply system 7 is used for providing air combustion supporting for the secondary combustion chamber 8 and is positioned above the pyrolysis chamber 4.

According to another embodiment of the present invention, the furnace shell of the furnace body 6 is made of carbon steel, and the lining of the furnace body 6 is composed of a heat-insulating layer and a flame-retardant layer.

According to another embodiment of the present invention, the grate 3 is a fixed grate 3 and is made of refractory material.

The fire grate 3 is used as a combustion bed for bearing the garbage pyrolysis, can select a multi-tower structure and is convenient for gas distribution and slag discharge.

According to the utility model discloses a still another embodiment still includes temperature control system 9, temperature control system 9 is connected with pyrolysis chamber 4, second combustion chamber 8 respectively.

The temperature control system 9 is mainly composed of thermocouples and displays the temperature of each chamber in the furnace.

The working principle and the process of the utility model are shown in figures 1-2:

1) receiving garbage: the domestic waste is pushed into the pyrolysis chamber 4 by the feed inlet 5. The pushing device can be pushed by a mechanical or hydraulic device.

2) The garbage pyrolysis process: a middle-low temperature (less than 800 ℃) carbon layer (oxide layer) is pre-stored on the fire grate 3, air enters the ash chamber 1 from the primary air supply system 2 to be preheated, the fire grate 3 provides a gasifying agent for the oxide layer, the temperature of the oxide layer on the fire grate 3 is kept, and domestic garbage on the oxide layer is gasified, pyrolyzed and reduced to form CO₂、CO、CH₄And the smoke dust forms mixed smoke.

3) The mixed flue gas of the secondary combustion chamber 8 is internally circulated and combusted: the secondary combustion chamber 8 is arranged above the pyrolysis chamber 4, negative pressure is formed on a pyrolysis layer by heat flow formed by garbage pyrolysis and the wind speed of the secondary air supply system 7, the mixed flue gas is automatically subjected to internal circulation high-temperature combustion (more than or equal to 850 ℃ and less than or equal to 1200 ℃) in the secondary combustion chamber 8 to form turbulent flow, the retention time of the mixed flue gas is prolonged, harmful and toxic gas formed in the pyrolysis chamber 4 is decomposed into harmless and non-toxic gas at high temperature, particularly dioxin is effectively decomposed, and fine dust after being burnt out slides into the pyrolysis layer through the gravity inertia of gas-solid separation (due to the washing of different wind resistances and different wind speeds) and further falls into the ash chamber 1 to be stored.

4) Smoke dust: because the smoke dust is internally circulated and burnt at high temperature, the pyrolysis furnace does not emit black smoke. The smoke is further processed and then processed by subsequent equipment.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a flue gas inner loop domestic waste pyrolysis oven, includes furnace body (6), its characterized in that: the furnace is characterized by further comprising a feed inlet (5), a smoke outlet (10), an ash outlet (13), an ash chamber (1), a pyrolysis chamber (4) and a fire grate (3), wherein the feed inlet (5) is arranged at the lower part of the furnace body (6), the smoke outlet (10) is arranged at the upper part of the furnace body (6), and the ash outlet (13) is arranged at the lower part of the furnace body (6); the furnace body (6) is layered by the fire grate (3), an ash chamber (1) is arranged below the fire grate (3), and an ash outlet (13) is connected with the ash chamber (1); a pyrolysis chamber (4) is arranged above the grate (3), and a feed inlet (5) is connected with the pyrolysis chamber (4);

the furnace is characterized by further comprising a second combustion chamber (8), wherein the second combustion chamber (8) is positioned above the pyrolysis chamber (4), the second combustion chamber (8) is composed of an outer cylinder (11) and an inner cylinder (12), the upper part of the furnace body (6) is sequentially provided with the inner cylinder (12) and the outer cylinder (11) from the center to the outside, the inner cylinder (12) is of a hollow structure, and a channel is formed between the outer wall of the inner cylinder (12) and the inner wall of the outer cylinder (11); the edges of the inner cylinder body (12) and the outer cylinder body (11) are of inverted Y-shaped structures.

2. The flue gas internal circulation household garbage pyrolysis furnace of claim 1, characterized in that: the dust chamber is characterized by further comprising a primary air supply system (2), wherein the primary air supply system (2) is connected with the dust chamber (1) and installed.

3. The flue gas internal circulation household garbage pyrolysis furnace of claim 1, characterized in that: the device also comprises a secondary air supply system (7), wherein the secondary air supply system (7) is connected and installed above the pyrolysis chamber (4).

4. The flue gas internal circulation household garbage pyrolysis furnace of claim 1, characterized in that: the furnace shell of the furnace body (6) is made of carbon steel, and the lining of the furnace body (6) is composed of a heat-insulating layer and a fire-resistant layer.

5. The flue gas internal circulation household garbage pyrolysis furnace of claim 1, characterized in that: the fire grate (3) is a fixed fire grate (3) and is made of refractory materials.

6. The flue gas internal circulation household garbage pyrolysis furnace of claim 1, characterized in that: the device is characterized by further comprising a temperature control system (9), wherein the temperature control system (9) is respectively connected with the pyrolysis chamber (4) and the secondary combustion chamber (8).