CN215627808U

CN215627808U - Slag discharging and sliding preventing device of UGI furnace

Info

Publication number: CN215627808U
Application number: CN202122289126.3U
Authority: CN
Inventors: 瞿美江; 徐松; 丁玉祥
Original assignee: Anhui Jinhe Industrial Co Ltd
Current assignee: Anhui Jinhe Industrial Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-01-25
Anticipated expiration: 2031-09-22

Abstract

The utility model relates to a slag discharging and sliding preventing device of a UGI furnace, which comprises an ash bin (1), wherein the ash bin (1) is connected with the outer wall of a lower furnace body (5), an ash inlet of the ash bin (1) is arranged on the outer side of a rotatable ash tray (2), the ash inlet of the ash bin (1) is connected with a transition flow baffle (3), and the transition flow baffle (3) is close to the side of the ash tray (2). The utility model can eliminate the phenomena of slag discharge and carbon slip, improve the utilization rate of raw materials, effectively control the residual carbon content of ash slag and reduce the comprehensive cost of charging; in addition, the method can also improve the gas quality of the semi-water gas, increase the effective components of the raw material gas for synthesizing ammonia, increase the yield of the synthetic ammonia in unit time, improve the product benefit, effectively reduce the decarburization load of the subsequent working section and the use of corresponding materials, meet the production requirement under large load and prolong the service cycle of the UGI furnace.

Description

Slag discharging and sliding preventing device of UGI furnace

Technical Field

The utility model relates to the technical field of UGI furnace equipment, in particular to a slag discharging and anti-sliding device of a UGI furnace.

Background

The UGI furnace is a fixed bed intermittent gasification furnace widely applied to the synthetic ammonia industry. The equipment is simple, the operation is easy, the processing requirement on the production raw materials is lower, the raw material requirement can be met only by adopting anthracite or coke with larger granularity, and the problem of the supply of the early-stage leaner chemical basic raw materials is solved to a great extent by the lower production raw material requirement. With the development of industrialization, the continuous progress of the technical level and the attention on environmental protection and energy conservation, the supply of chemical raw materials is also changed. Especially, when the supply of anthracite (white coal) is changed from the previous lump coal (80 mm diameter) to the present small-particle coal (the minimum particle size is 10 mm), the early gasification condition is changed, the small-particle anthracite cannot be well suitable for the requirements of the UGI furnace, the operation of the UGI furnace is unstable, the gas supply is insufficient, and the energy consumption is increased. The most obvious influence is that the slag discharge of the UGI furnace can not be stable, the phenomenon of slag discharge and carbon slip occurs, the content of anthracite which is not gasified in ash slag is too large, and the carbon residue of the slag is too high, so that the production cost is increased, and the operation stability of the UGI furnace is reduced. How to solve the problems of unstable slag discharge and slag and carbon slip caused by the change of production raw materials is a problem which is urgently needed to be solved at present.

SUMMERY OF THE UTILITY MODEL

In order to solve the existing problems, the utility model provides a slag discharging and anti-sliding device of a UGI furnace.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a sediment of UGI stove prevents swift current device, includes the ash bin, ash bin and furnace body exterior wall connection down, and ash bin ash inlet establishes in rotatable ash tray outside, its characterized in that: the ash inlet of the ash bin is connected with a transition flow baffle, and the transition flow baffle is close to the side of the ash tray.

Furthermore, the upper end surface of the transition flow baffle is coplanar with the upper end surface of the ash tray.

Furthermore, the transition flow baffle is a petal-shaped graph divided by concentric rings passing through the center of a circle, and the center of the circle is superposed with the center of the ash tray.

Further, the difference between the radius of the outer arc and the radius of the inner arc of the transition baffle is 18-20 cm.

Furthermore, the transition flow baffle is connected with the ash bin in a welding mode.

Furthermore, the transition flow baffle is also provided with a reinforcing rib.

The utility model has the following beneficial effects:

1. as the particle size of the production raw materials is reduced, the gasified slag can not effectively bear the pressure of the upper carbon layer, so that carbon sliding occurs after the slag enters the ash bucket.

2. The upper end surface of the transition flow baffle and the upper end surface of the ash tray are designed to be coplanar, so that gasified slag is stably moved onto the transition flow baffle, and a carbon layer on the upper part of the slag is prevented from being disturbed.

3. The transition flow baffle is additionally provided with the reinforcing ribs, so that the rigidity and the strength of the transition flow baffle can be effectively improved, and the bearing capacity and the thermal deformation resistance of the transition flow baffle are improved.

Drawings

FIG. 1 is a schematic view of the external shape of a UGI furnace;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of a transition baffle structure;

FIG. 4 is a partial sectional view B-B of FIG. 2;

fig. 5 is a partial cross-sectional view of C-C of fig. 2.

Detailed Description

In order to make the utility model more clear, the slag discharging and anti-sliding device of the UGI furnace is further described below with reference to the attached drawings, and the specific embodiment described herein is only used for explaining the utility model and is not used for limiting the utility model.

The embodiment is based on the modification of the existing equipment, as shown in fig. 1, the modification is located at the lower furnace body 5 part, and is a schematic appearance diagram of the UGI furnace of the existing equipment.

As shown in fig. 2 to 5, the slag discharging and sliding preventing device of the UGI furnace comprises ash bins 1, wherein the ash bins 1 are hopper-shaped, the upper ends of the ash bins are ash inlets, the number of the ash bins 1 is 2, the ash bins 1 are respectively and symmetrically distributed on two sides of the furnace body and are connected with the outer wall of the lower furnace body 5, and the ash inlets of the ash bins 1 are close to the outer side of an ash tray 2. The ash tray 2 is a rotary bearing device of the UGI furnace, is horizontally arranged in the lower furnace body 5, and has a rotary axis coinciding with the axis of the furnace body and a rotary direction rotating anticlockwise. The side wall of the ash inlet of the ash bin 1 is welded with the two end sides of the transition flow baffle 3, and the transition flow baffle 3 is close to the outer side of the ash tray 2 and does not interfere with each other. The transition baffle 3 is seen from the view of fig. 2: the transition flow baffle 3 is a petal-shaped graph which is divided by concentric rings passing through the center of a circle, and the center of the circle is superposed with the center of the ash tray 2, so that the gap between the transition flow baffle 3 and the outer side of the ash tray 2 can be ensured to be the same. As shown in fig. 3, the difference L between the outer arc radius and the inner arc radius of the transition baffle 3 is 18-20cm, the plate thickness is 20mm (the size L of the transition baffle 3 is reasonably determined according to the actual ash discharge amount of the UGI furnace), a steel plate made of the same material as the furnace body, here, a middle plate made of Q355B material is cut, a group of reinforcing ribs 4 are connected to the lower end face of the transition baffle 3, and the reinforcing ribs 4 are arranged perpendicularly to each other. In addition, the upper end surface of the transition flow baffle 3 and the upper end surface of the ash tray 2 are in the same plane.

In this embodiment, the reinforcing ribs 4 and the transition flow baffle 3 are welded into a whole, the welded transition flow baffle 3 is welded at the ash inlet of the ash bin 1, the position requirements of the transition flow baffle 3 and the ash tray 2 are ensured, and finally, the operation parameters of the UGI furnace are adjusted to start the trial operation.

The slag discharging of the existing UGI furnace rotates anticlockwise through the ash tray 2, and ash slag generated by gasification is blocked by the ash plough 6 to enter the ash bin 1. Specifically, the method comprises the following steps: the raw material coal is changed into particles from blocks, and ash particles generated by gasification are correspondingly reduced. When the lime-ash rotates under the effect of ash tray 2, because ash storehouse 1 entry is established at the anterior segment of ash plough 6, the lime-ash interact of small granule can't bear the effort of upper portion, this ash-ash that just causes partial glaze glass state gets into the income ash mouth of ash storehouse 1 in advance, cause this regional lime-ash to form a cavity district, the upper portion carbon-layer sharply moves down under the effect of gravity and the inside gasification of stove flows, cause the high temperature red carbon on top oxide layer and reduction layer to get into the lime-ash layer, because there is not the lime-ash layer to support directly to get into the ash bucket, the sediment swift current carbon phenomenon will appear arranging, stably bring very big operation drawback for gasification operation. In the scheme, the transition flow baffle 3 is arranged, so that effective bearing area and bearing capacity are provided for gasified slag, the use effect is better particularly when small-particle raw material coal is adopted, and the phenomena of slag discharge and carbon slip are prevented; the upper end surface of the transition flow baffle 3 and the upper end surface of the ash tray are designed to be coplanar, so that gasified slag is stably and slowly moved onto the transition flow baffle, the phenomena that a cavity area is formed due to too low ash residues at the surface position of the transition flow baffle 3 and an upper carbon layer is reversely extruded due to too high ash residues at the surface position of the transition flow baffle 3 are avoided, the upper carbon layer of the slag is prevented from being disturbed, and the UGI furnace is stable in operation; the transition baffle 3 is additionally provided with the reinforcing ribs 4, so that the rigidity and the strength of the transition baffle can be effectively improved, and the bearing capacity and the thermal deformation resistance of the transition baffle are improved; the transition flow baffle 3 and the outer side of the ash tray 2 are arranged in a uniform clearance, so that ash and slag can be prevented from being clamped into the gap to block the normal operation of the ash tray 2.

After the scheme is adopted, the most obvious change of the UGI furnace is that the phenomena of slag discharging and carbon slipping do not occur under different loads, so that the proportion of small-particle-size anthracite in the raw materials can be improved, the utilization rate of the raw materials is improved, the residual carbon of ash slag is effectively controlled, and the comprehensive cost of entering the furnace is reduced; secondly, after the original UGI furnace uses large raw materials, the carbon dioxide of the produced semi-water gas accounts for 11% of the volume ratio, and is changed into small-granularity anthracite as the raw material, the carbon dioxide of the semi-water gas is reduced to 7%, according to the flow of 6 ten thousand standard squares of the production capacity of the existing device, the contents of the carbon monoxide and the hydrogen of the effective gas of the semi-water gas are improved, about 2500 standard squares are summed, the effective work in unit time is increased, the compression power consumption is reduced, the productivity is increased, the decarburization load of the subsequent working section and the corresponding material use are effectively reduced, and the product benefit is increased; and finally, the gas production rate of the UGI furnace is stable, the production requirement under increased load is met, the service life of the UGI furnace can be prolonged to more than 12 months from the original service life of 7 months, and the service life of the UGI furnace is prolonged.

The above-mentioned embodiments are intended to illustrate the technical idea and the gist of the present invention in detail as a preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention, and any simple modification and equivalent structural change or modification made according to the spirit of the present invention should be covered within the scope of the present invention.

Claims

1. The utility model provides a sediment of UGI stove prevents swift current device, includes ash bin (1), ash bin (1) and furnace body (5) outer wall connection down, and ash bin (1) are gone into the ash mouth and are established in rotatable ash tray (2) outside, its characterized in that: the ash inlet of the ash bin (1) is connected with a transition flow baffle (3), and the transition flow baffle (3) is close to the side of the ash tray (2).

2. The slag discharging and slipping preventing device of the UGI furnace as claimed in claim 1, wherein: the upper end surface of the transition flow baffle (3) is coplanar with the upper end surface of the ash tray (2).

3. The slag discharging and slipping preventing device of the UGI furnace as claimed in claim 2, wherein: the transition flow baffle (3) is a petal-shaped graph which is divided by concentric rings passing through the center of a circle, and the center of the circle is superposed with the center of the ash tray (2).

4. The slag discharging and slipping preventing device of the UGI furnace as claimed in claim 3, wherein: the difference between the radius of the outer arc and the radius of the inner arc of the transition flow baffle (3) is 18-20 cm.

5. The slag discharging and slipping preventing device of the UGI furnace as claimed in claim 1 or 4, wherein: the transition flow baffle (3) is connected with the ash bin (1) in a welding mode.

6. The slag discharging and slipping preventing device of the UGI furnace as claimed in claim 5, wherein: the transition flow baffle (3) is also provided with a reinforcing rib (4).