CN218539599U - Full jacket pure oxygen gasification furnace - Google Patents

Abstract

The utility model discloses a full-jacketed pure oxygen oxidation furnace, which comprises a furnace body and a furnace bottom assembly arranged at the bottom of the furnace body. The furnace body includes a lower furnace body and an upper Furnace body, the key lies in: the upper furnace body includes a cylindrical upper water jacket, two oval heads connected with the upper water jacket to form an integrated water jacket structure and matching water inlets, Sewage outlet and steam outlet; on the top of the upper furnace body, a water gas outlet and a coal filling port are arranged. The beneficial effects of the utility model are: 1. The upper furnace body is designed as an integrated water jacket structure, which can realize the purpose of maximizing waste heat recovery and preventing the phenomenon of hanging on the wall; 2. A jacket uniform temperature zone is designed in the middle of the lower furnace body , can avoid the generation of air resistance, make the temperature of the tubular water jacket more uniform, improve the gasification reaction speed in the furnace, and reduce the effect of ash residue carbon.

Description

Full jacket pure oxygen oxidation furnace

technical field

The utility model belongs to the technical field of coal gasification, in particular to a full-jacketed pure oxygen gasification furnace.

Background technique

The structure of the existing pure oxygen oxidation furnace is that the upper section (including the top) is an adiabatic section, and the lower section is a water jacket section, such as the technical solutions disclosed in patents such as CN110951503A and CN209685706U. The disadvantages of this structure are: 1. It will cause low operating flexibility, the semi-slag in the oxidation section and reduction section of the gasification layer is easy to hang on the wall, and the thickness of the reaction layer is not enough, so the gasification intensity and water gas production cannot be improved; 2. Effective heat exchange The area is small, and some effective heat cannot be recovered enough during the reaction process of the gasifier.

Contents of the invention

The technical problem to be solved by the utility model is to provide a full-jacketed pure oxygen oxidation furnace, the top of which adopts a jacket-type structure, and circulating water is introduced into the jacket, which can effectively prevent the phenomenon of hanging on the wall and realize the recovery and utilization of waste heat. Purpose of producing steam.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a full-jacket pure oxygen oxidation furnace, including a furnace body and a furnace bottom assembly arranged at the bottom of the furnace body, and the furnace body includes a lower furnace body and a furnace body. The key point of the upper furnace body located on the upper part of the lower furnace body is that the upper furnace body includes a cylindrical upper water jacket, two oval Shaped head and supporting water inlet, sewage outlet and steam outlet; the top of the upper furnace body is provided with a water gas outlet and a coal inlet.

Further, the lower furnace body is a tubular water jacket, and the height of the upper furnace body is 1/3-2/5 of the height of the lower furnace body.

Further, an annular jacket soaking zone is provided in the middle of the lower furnace body, and the tubes in the lower furnace body located on the upper and lower sides of the jacket soaking zone communicate with the jacket soaking zone.

Further, a material level detector installation port and a viewing hole installation port are provided on the top of the upper furnace body.

Further, the furnace bottom assembly includes a grate, a chain grate machine that drives the grate to rotate, and a gasification agent inlet air box.

Further, an ash bin and a slag breaking bar are provided at the bottom of the furnace body.

Further, an ash box for receiving the ash in the ash bin is provided under the furnace body.

Further, an ash lowering seat valve is provided at the ash outlet of the ash bin.

Further, an ash conveyor is provided below the slag outlet of the ash box.

Further, a lower ash gate valve and an ash chute for guiding ash to the ash conveyor are provided at the slag outlet of the ash box.

The beneficial effects of the utility model are: 1. The upper furnace body is designed as an integrated water jacket structure, which can realize the purpose of maximizing waste heat recovery and preventing wall hanging; 2. A uniform jacket is designed in the middle of the lower furnace body. In the temperate zone, it can avoid the generation of air resistance, make the temperature of the tubular water jacket more uniform, improve the gasification reaction speed in the furnace, and reduce the effect of ash residue carbon.

The utility model is described in detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is a structural schematic diagram of a full-jacketed pure oxygen oxidation furnace of the present invention.

In the accompanying drawings, 1, the lower furnace body, 2, the upper furnace body, 2-1, the upper water jacket, 2-2, the oval head, 2-3, the water inlet, 2-4, the sewage outlet, 2- 5. Steam outlet, 2-6, water gas outlet, 2-7, coal filling port, 2-8, material level detector installation port, 2-9, inspection hole installation port, 3, jacket uniform temperature zone, 4, furnace Grate, 5, chain grate machine, 6, gasification agent inlet bellows, 7, ash bin, 8, slag breaking bar, 9, ash box, 10, lower ash seat plate valve, 11, ash conveyor, 12 , the lower ash flapper valve, 13, the ash slag chute.

Detailed ways

Referring to the accompanying drawings, the utility model provides a full-jacketed pure oxygen oxidation furnace, which includes a furnace body and a furnace bottom assembly arranged at the bottom of the furnace body. The furnace body includes a lower furnace body 1 and an upper Furnace body 2, the key lies in: the upper furnace body 2 includes a cylindrical upper water jacket 2-1 and two oval heads 2-1 connected with the upper water jacket 2-1 and forming an integrated water jacket structure 2 and supporting water inlet 2-3, sewage outlet 2-4 and steam outlet 2-5.

The structure of the upper water jacket 2-1 includes an inner cylinder and an outer cylinder, and two elliptical heads 2-2 are respectively connected with the inner cylinder and the outer cylinder to form an integrated water jacket structure. By designing the upper furnace body 2 with an integrated water jacket structure, the waste heat recovery area can be increased and the steam recovery rate can be improved. Circulating water is introduced into the upper water jacket 2-1 formed by the inner and outer double-layer structure, and the outward heat dissipation in the furnace is absorbed by the water, so as to achieve the functions of waste heat recovery and utilization and by-product steam; the double-layer oval head 2-2 forms The one-piece water jacket structure can save the furnace body and the heat insulation lining refractory material on the top of the furnace body, which solves the problem of heat consumption of the furnace, saves investment and energy, and can effectively prevent the wall hanging phenomenon and improve the carbon layer. Height and gasification intensity, lower furnace top gas outlet temperature, improve operating environment, increase single furnace gas output.

The top of the upper furnace body 2 is provided with a water gas outlet 2-6, a coal filling port 2-7, a material level detector installation port 2-8 and a viewing hole installation port 2-9.

The lower furnace body 1 is a tubular water jacket, and the height of the upper furnace body 2 is 1/3-2/5 of the height of the lower furnace body 1 . In this way, the gasification layer can be placed within the jacket range of the lower furnace body 1, which can reduce the effective heat energy loss of the gasification layer and improve the utilization rate of carbon.

The middle part of the lower furnace body 1 is provided with an annular jacket temperature equalizing zone 3 , and the tubes located on the upper and lower sides of the jacket equal temperature zone 3 in the lower furnace body 1 communicate with the jacket constant temperature zone 3 . The design of the uniform temperature zone 3 of the jacket can improve the strength of the water jacket located at the lower part of the jacket from the structure, eliminate the occurrence of air resistance, make the temperature of the jacket more uniform, and ensure that the temperature of the gasification layer in the gasifier is uniform and the gas The chemical reaction effect is improved, the residual carbon of the ash residue is reduced, and the service life is increased.

A temperature-measuring sleeve is welded on the inner cylinder wall of the lower furnace body 1 to facilitate the installation of temperature-measuring elements. The temperature measuring device collects and transmits data to the DCS control system. The DCS control system regulates the ratio of steam, oxygen and the speed of the grate machine according to the detected temperature, and then controls the temperature of the gasification layer to stabilize the gasification temperature at the carbon conversion temperature and softening temperature. between temperatures.

The furnace bottom assembly includes a fire grate 4, a chain grate machine 5 for driving the fire grate 4 to rotate, and a gasification agent inlet bellows 6.

The bottom of the furnace body is provided with an ash bin 7 and a slag breaking bar 8 . The slag breaking bar 8 adopts a trapezoidal structure with a narrow top and a wide bottom, which improves the slag breaking capacity, and at the same time plays the role of slag bearing, flow prevention, and reducing the wear of the water jacket. The reasonable slag discharge angle does not need to add internal flow prevention, completely eliminating The phenomenon of carbon flow and carbon collapse in the gasifier is eliminated, the process of the gasification furnace is more stable, and the slag coking rate can be maintained at an ideal level to ensure no carbon flow.

Below the furnace body, an ash box 9 for receiving the ash in the ash bin 7 is provided. The ash outlet of the ash bin 7 is provided with a lower ash seat plate valve 10 . Below the slag outlet of the ash box 9, an ash conveyor 11 is arranged. At the slag outlet of the ash box 9, a lower ash flapper valve 12 and an ash chute 13 leading to the ash conveyor 11 are provided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should understand that: still The specific implementation of the utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the utility model, all of them should be included in the scope of the technical solution claimed by the utility model.

Claims (10)

1. The utility model provides a full pure oxygen gasification stove that presss from both sides cover, includes the furnace body and sets up the stove bottom assembly of furnace body bottom, the furnace body includes furnace body (1) down and is located last furnace body (2) on lower furnace body (1) upper portion, its characterized in that: the upper furnace body (2) comprises a cylindrical upper water jacket (2-1), two oval seal heads (2-2) which are connected with the upper water jacket (2-1) and form an integrated water jacket structure, and a water inlet (2-3), a sewage outlet (2-4) and a steam outlet (2-5) which are matched; the top of the upper furnace body (2) is provided with a water gas outlet (2-6) and a coal feeding port (2-7).

2. The fully jacketed pure oxygen furnace as claimed in claim 1, wherein: the lower furnace body (1) is a tube type water jacket, and the height of the upper furnace body (2) is 1/3-2/5 of the height of the lower furnace body (1).

3. The fully jacketed pure oxygen furnace as claimed in claim 2, characterized in that: an annular jacket temperature equalizing zone (3) is arranged in the middle of the lower furnace body (1), and the tubes in the lower furnace body (1) on the upper side and the lower side of the jacket temperature equalizing zone (3) are communicated with the jacket temperature equalizing zone (3).

4. The fully jacketed pure oxygen furnace as claimed in claim 1, wherein: the top of the upper furnace body (2) is provided with a material level detector mounting opening (2-8) and a detection hole mounting opening (2-9).

5. The fully jacketed pure oxygen furnace as claimed in any one of claims 1 to 4, characterized in that: the furnace bottom assembly comprises a furnace grate (4), a chain grate machine (5) for driving the furnace grate (4) to rotate and a gasification agent inlet air box (6).

6. The fully jacketed pure oxygen furnace of claim 5, wherein: an ash bin (7) and a slag breaking strip (8) are arranged at the bottom of the furnace body.

7. The fully jacketed pure oxygen furnace as claimed in claim 6, wherein: an ash box (9) for receiving ash in the ash bin (7) is arranged below the furnace body.

8. The fully jacketed pure oxygen furnace as claimed in claim 7, wherein: a lower ash seat plate valve (10) is arranged at the ash outlet of the ash bin (7).

9. The fully jacketed pure oxygen furnace as claimed in claim 7, wherein: and a clinker conveyor (11) is arranged below the clinker outlet of the clinker box (9).

10. The fully-jacketed pure oxygen gasifier according to claim 9, characterized in that: and a slag outlet of the slag box (9) is provided with a lower ash gate valve (12) and a slag chute (13) for guiding slag to the slag conveyor (11).

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