CN215757177U

CN215757177U - Hearth structure of energy-saving gas producer

Info

Publication number: CN215757177U
Application number: CN202121248638.9U
Authority: CN
Inventors: 李明元; 李和红; 宇正权
Original assignee: Shizongxin Mintai Ceramics Co ltd
Current assignee: Shizongxin Mintai Ceramics Co ltd
Priority date: 2021-06-05
Filing date: 2021-06-05
Publication date: 2022-02-08
Anticipated expiration: 2031-06-05

Abstract

The utility model discloses a hearth structure of an energy-saving coal gas producer, which comprises a top cover, a furnace body and an ash tray which are sequentially connected, wherein a charging opening is arranged at the center of the top cover, a grate is arranged on the ash tray, the furnace body comprises an upper part, a middle part and a lower part which are sequentially connected from top to bottom, the upper part is a vertically arranged straight cylindrical structure, the middle part is a hollow structure with an outward bulge in the middle and gradually contracted upper and lower ends, the lower part is a tapered necking structure with a large upper port and a small lower port, the furnace body sequentially comprises a hearth wall, a fire-resistant pouring layer, an air flow layer and a shell from inside to outside, a spiral water pipe is arranged in the fire-resistant pouring layer, an air inlet pipe is arranged at the upper part of the shell, an air outlet pipe is arranged at the lower part of the shell, and a steam inlet pipe is arranged on the ash tray below the grate and communicated with the steam inlet pipe through a communicating pipe. The utility model has reasonable structure, good gasification effect, high gas production, energy saving and obvious economic and social values.

Description

Hearth structure of energy-saving gas producer

Technical Field

The utility model relates to the technical field of ceramic tile production, in particular to a hearth structure of an energy-saving gas producer.

Background

An acid and alkali resistant porcelain or stone building decoration material, called as ceramic tile, is made up of refractory metal oxide and semimetal oxide through grinding, mixing, pressing, glazing and sintering. In the sintering process of the ceramic tile, coal gas needs to be introduced into the firing roller kiln, and the coal gas burns to generate a large amount of heat, so that the temperature in the roller kiln is increased, and the requirement of the ceramic tile on high temperature during sintering is met. Because the quantity of the coal gas needed is larger when the ceramic tiles are sintered, in order to reduce the production cost, a plurality of ceramic tile production enterprises are provided with the coal gas producer which is used for producing the coal gas and meeting the requirement of the ceramic tiles on the coal gas when the ceramic tiles are sintered.

At present, most of hearths of the existing gas generators are of straight cylinder type structures, the inner diameters of the hearths are consistent up and down, the problem of relatively small space volume exists, the retention time of a gasifying agent in the hearths is short, the flow rate is high, the gasifying effect is poor, the furnace temperature is low, the gas production quality is poor, the coal consumption is high, and the requirements of ceramic tile enterprises on gas production cannot be well met. Therefore, the development of the hearth structure of the energy-saving gas producer with reasonable structure, good gasification effect and high gas production is objectively needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hearth structure of an energy-saving gas producer, which has the advantages of reasonable structure, good gasification effect and high gas production rate.

The utility model aims to realize the purpose, which comprises a top cover, a furnace body and an ash tray which are sequentially connected, wherein a charging hole is arranged at the center of the top cover, a grate is arranged on the ash tray, the furnace body comprises an upper part, a middle part and a lower part which are sequentially connected from top to bottom, the upper part is a vertically arranged straight cylindrical structure, the middle part is a hollow structure with an outward bulge in the middle and gradually contracted upper and lower ends, the lower part is a tapered necking structure with a large upper port and a small lower port, a gas outlet pipe is arranged on the side wall of the upper part, the furnace body sequentially comprises a furnace wall, a fire-resistant pouring layer, an airflow layer and a shell from inside to outside, a spiral water pipe is arranged in the fire-resistant pouring layer, a water inlet pipe is arranged at the lower port of the spiral water pipe, a steam outlet pipe is arranged at the upper port, the end parts of the water inlet pipe and the steam outlet pipe respectively sequentially pass through the airflow layer and the shell and then are positioned at the outer side of the furnace body, an air inlet pipe is arranged at the upper part of the shell, the lower part is provided with an air outlet pipe, the air inlet pipe and the air outlet pipe are both communicated with the airflow layer, the ash tray below the grate is provided with a steam inlet pipe, and the air outlet pipe is communicated with the steam inlet pipe through a communicating pipe.

Further, a spiral guide plate is arranged in the airflow layer.

Furthermore, a heat insulation layer is arranged on the outer wall of the shell.

Furthermore, smooth transition is realized between the upper part and the middle part and between the middle part and the lower part.

Furthermore, the lower end of the middle part is tangentially connected with the upper end of the lower part.

When the coal gasification furnace is operated, coal enters the furnace from the charging opening and is placed on the grate, mixed gas of water vapor and air is used as a gasification agent and enters the furnace from the steam inlet pipe, when the gasification agent reaches the middle position of the furnace body through the coal, the middle position of the middle part protrudes outwards, and the cross sectional area of the middle part is larger, so that the space volume of the middle part is larger than that of the lower part, the flow speed of the gasification agent is reduced when the gasification agent flows to the middle position, correspondingly, the retention time of the gasification agent in the furnace is increased, finally, higher furnace temperature can be obtained under the same condition, more coal gas is produced, the gasification effect is better, the gas production amount of the coal gas is increased, and the consumption of the coal is reduced; secondly, water is introduced into the spiral water pipe to absorb heat emitted by the hearth, so that heat loss and waste are avoided, water is heated to generate water vapor, the water vapor can enter the hearth through the vapor inlet pipe, meanwhile, air is introduced into the airflow layer, the air absorbs the heat emitted by the hearth to preheat, the heat is further utilized, the temperature of the air is raised, and the air is conveyed into the vapor inlet pipe to be mixed with the vapor. The utility model has reasonable structure, good gasification effect, high gas production, energy saving and obvious economic and social values.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1-top cover, 2-furnace body, 3-ash tray, 4-charging hole, 5-grate, 6-upper part, 7-middle part, 8-lower part, 9-gas outlet pipe, 10-furnace wall, 11-fire-resistant casting layer, 12-airflow layer, 13-shell, 14-spiral water pipe, 15-water inlet pipe, 16-steam outlet pipe, 17-air inlet pipe, 18-air outlet pipe, 19-steam inlet pipe, 20-communicating pipe, 21-spiral guide plate and 22-heat preservation layer.

Detailed Description

The present invention is further described with reference to the drawings, but the present invention is not limited thereto in any way, and any modification or improvement based on the present invention is within the protection scope of the present invention.

As shown in figure 1, the coal ash furnace comprises a top cover 1, a furnace body 2 and an ash tray 3 which are sequentially connected, wherein a charging opening 4 is arranged at the center of the top cover 1, a grate 5 is arranged on the ash tray 3, the ash tray 3 and the grate 5 are of the existing structure, the ash tray 3 is used for loading carbon ash formed after coal combustion, the grate 5 is used for placing coal, meanwhile, the carbon ash formed after the coal combustion can fall into the ash tray 3 from a gap in the grate 5, the furnace body 2 comprises an upper part 6, a middle part 7 and a lower part 8 which are sequentially connected from top to bottom, the upper part 6 is a vertically arranged straight cylindrical structure, the middle part 7 is a hollow structure which is convex outwards in the middle and gradually shrinks from top to bottom, preferably, the cross section of the side wall of the middle part 7 is arc-shaped, the lower part 8 is a conical necking structure with a large upper end opening and a small end opening, a gas outlet pipe 9 is arranged on the side wall of the upper part 6, and the furnace body 2 sequentially comprises a hearth wall 10, a furnace body, The fire-resistant pouring layer 11, the airflow layer 12 and the shell 13, a spiral water pipe 14 is arranged in the fire-resistant pouring layer 11, a water inlet pipe 15 is arranged at the lower port of the spiral water pipe 14, a steam outlet pipe 16 is arranged at the upper port, the end parts of the water inlet pipe 15 and the steam outlet pipe 16 respectively penetrate through the airflow layer 12 and the shell 13 in sequence and then are positioned on the outer side of the furnace body 2, an air inlet pipe 17 is arranged at the upper part of the shell 13, an air outlet pipe 18 is arranged at the lower part of the shell 13, the air inlet pipe 17 and the air outlet pipe 18 are both communicated with the airflow layer 12, a steam inlet pipe 19 is arranged on the ash tray 3 below the grate 5, and the air outlet pipe 18 is communicated with the steam inlet pipe 19 through a communicating pipe 20.

When the coal gasification furnace is operated, coal enters a hearth from a charging opening 4 and is placed on a grate 5, mixed gas of water vapor and air is used as a gasification agent and enters the hearth from a vapor inlet pipe 19, when the gasification agent passes through the coal and reaches the middle position of a furnace body 2, the middle position protrudes outwards, and the cross sectional area of the middle position is larger, so that the space volume of the middle part is larger than that of the lower part 8, the flow rate of the gasification agent is reduced when the gasification agent flows to the middle position, correspondingly, the retention time of the gasification agent in the hearth is increased, and finally, higher furnace temperature can be obtained under the same condition, more coal gas is produced, the gasification effect is better, the gas production rate of the coal gas is increased, and the consumption of the coal is reduced; secondly, water is introduced into the spiral water pipe 14 to absorb heat emitted by the hearth, so that heat loss and waste are avoided, water is heated to generate water vapor, the water vapor can enter the hearth through the vapor inlet pipe 19, meanwhile, air is introduced into the airflow layer 12 to absorb the heat emitted by the hearth to preheat, the heat is further utilized, the temperature of the air is raised, and the air is conveyed into the vapor inlet pipe 19 to be mixed with the vapor.

Be provided with spiral guide plate 21 in the air current layer 12, the air gets into air current layer 12 from air intake pipe 17, upwards flow in air current layer 12, in air current layer 12 of air intake pipe 17 one side dorsad, air flow rate is slow relatively or even detain motionlessly, this can lead to the reduction of air heat absorption efficiency, and set up spiral guide plate 21 back, the air is under spiral guide plate 21's guide effect, spiral upwards flow in air current layer 12, can be even flow in air current layer 12, the condition that does not have the air to detain, the heat that the absorption furnace that the air can be better distributes out.

In order to prevent the heat in the furnace from being dissipated to the surrounding environment and causing energy waste, the outer wall of the casing 13 is provided with an insulating layer 22.

The joints between the upper part 6 and the middle part 7 and between the middle part 7 and the lower part 8 are corner structures, the stress at the position has the defects of discontinuity and non-uniformity, stress concentration can be formed, the working condition in the hearth is severe, the joints between the upper part 6 and the middle part 7 and between the middle part 7 and the lower part 8 are easy to crack or even damage, and the smooth transition and tangential connection structures can enable uniform stress to a certain degree, so that in order to improve the service life of the position, the smooth transition between the upper part 6 and the middle part 7 and between the middle part 7 and the lower part 8 and the tangential connection between the lower end of the middle part 7 and the upper end of the lower part 8 are realized.

Claims

1. The utility model provides a furnace structure of energy-conserving type gas producer, is including top cap (1), furnace body (2) and ash tray (3) that connect gradually, the center department of top cap (1) is provided with charge door (4), be provided with grate (5), its characterized in that on ash tray (3): the furnace body (2) comprises an upper part (6), a middle part (7) and a lower part (8) which are sequentially connected from top to bottom, the upper part (6) is of a vertically arranged straight cylindrical structure, the middle part (7) is of a hollow structure with a middle part protruding outwards and upper and lower ends gradually contracting, the lower part (8) is of a conical necking structure with a large upper end opening and a small lower end opening, a coal gas outlet pipe (9) is arranged on the side wall of the upper part (6), the furnace body (2) sequentially comprises a furnace chamber wall (10), a fire-resistant pouring layer (11), an airflow layer (12) and a shell (13) from inside to outside, a spiral water pipe (14) is arranged in the fire-resistant pouring layer (11), a water inlet pipe (15) is arranged at the lower end opening of the spiral water pipe (14), a steam outlet pipe (16) is arranged at the upper end opening, the end parts of the water inlet pipe (15) and the steam outlet pipe (16) respectively sequentially pass through the airflow layer (12) and the shell (13) and then are positioned outside the furnace body (2), an air inlet pipe (17) is arranged at the upper part of the shell (13), an air outlet pipe (18) is arranged at the lower part of the shell, the air inlet pipe (17) and the air outlet pipe (18) are both communicated with the airflow layer (12), a steam inlet pipe (19) is arranged on the ash tray (3) below the grate (5), and the air outlet pipe (18) is communicated with the steam inlet pipe (19) through a communicating pipe (20).

2. The hearth structure of an energy-saving gas producer according to claim 1, characterized in that a spiral deflector (21) is arranged in the gas flow layer (12).

3. The hearth structure of the energy-saving gas producer according to claim 1, characterized in that an insulating layer (22) is arranged on the outer wall of the outer shell (13).

4. The hearth structure of the energy-saving gas producer according to claim 1, characterized in that the upper part (6) and the middle part (7) and the lower part (8) are in smooth transition.

5. The hearth structure of the energy-saving gas producer according to claim 1, characterized in that the lower end of the middle part (7) is tangentially connected with the upper end of the lower part (8).