CN215372939U - Straw package direct combustion gasification hot blast stove - Google Patents

Abstract

A straw bag direct-fired gasification hot-blast stove belongs to boiler products; the method comprises the following steps that a plate-type fire-retardant sleeve, a fire-retardant rear pipe and a fire-retardant front pipe are sequentially installed in a combustion hearth from top to bottom, annular hot air ducts are installed on the outer wall surface of a furnace shell and are mutually communicated at the outer side parts of the plate-type fire-retardant sleeve, the fire-retardant front pipe and the fire-retardant rear pipe at the same horizontal position, the annular hot air ducts are divided into closed sections I, II, III and IV by sealing partitions A, B, C, D, a plurality of direct-fired air pipes are assembled on the bottom end part of the furnace shell along the tangential direction, annular air supply ducts are assembled on the furnace shell and at the same horizontal position outside the plurality of direct-fired air pipes in a contained mode, the annular hot air ducts are communicated with the annular air supply ducts by the air supply pipes, and cold air inlets are communicated with the annular hot air ducts; the furnace has strong direct-combustion capability of adapting to straw bales, balanced and consistent layer-by-layer combustion speed of the straw bales, clean and thorough combustion, stable heat productivity and small fluctuation of heat energy and temperature difference of hot flue gas.

Description

Straw package direct combustion gasification hot blast stove

Technical Field

The utility model belongs to boiler products, and mainly relates to a straw bag direct-fired gasification hot-blast stove.

Background

The traditional block or granular straw fuel is prepared by processing crop straws through the technical processes of crushing, drying, briquetting or granulating, has the problem of high fuel price, consumes a large amount of electric energy in production, and is difficult to accept by users without the subsidy of national policies. In order to solve the problems, in recent years, a mode of directly feeding a whole bundle of straw fuel into a gasification hot blast stove for combustion has been researched and developed, and the mode greatly reduces the raw material cost and the use cost of the straw fuel. However, due to the structural design defects of the existing straw bale direct-combustion gasification hot-blast stove, the adaptability to the straw bale is poor, when the straw water content of the straw bale is high or more ice and snow impurities are carried in the straw bale, the phenomenon that the combustion speed is inconsistent, unstable and incomplete exists in the whole bundle of straw bale in the layer-by-layer combustion from outside to inside, the temperature and the heat energy of hot flue gas output by the gasification hot-blast stove are high and low in time fluctuation, and the stability of the quality of the output hot flue gas is influenced.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and develops a straw bag direct-fired gasification hot-air furnace with a new structure by combining the actual requirements of the current straw bag direct-fired gasification hot-air furnace, so as to achieve the purposes of strong straw bag adapting capability, stable and consistent straw bag direct-fired speed, thorough combustion and small output hot flue gas temperature difference and thermal energy fluctuation.

The basic design of the utility model is as follows: the utility model provides a straw package direct combustion gasification hot blast stove includes the furnace casing the supreme branch spark disc and the hot flue gas guide plate of setting gradually down are followed on the lateral part in the burning furnace of furnace casing, and the flue will burn furnace and gas-gas heat exchanger intercommunication, and the straw package is sent into the mouth and is set up on furnace casing lateral part down in the burning furnace, be located branch spark disc below position department from last to installing plate-type back-fire relief sleeve and back-fire relief back-tube, back-fire relief front tube down in proper order, plate-type back-fire relief sleeve on vertically set up a plurality of intercommunicating pores the same horizontal position outside position department of back-fire relief sleeve and back-fire relief front tube, back-fire relief front tube contains and installs annular hot air duct on the furnace casing outer wall face, be located plate-type back-fire relief sleeve and back-fire relief front tube, annular hot air duct along circumferencial direction in proper order installation seal baffle A, seal baffle B, seal baffle C and seal baffle D, seal baffle A and seal baffle B, The annular hot air duct is divided into a closed I section, a closed II section, a closed III section and a closed IV section between the sealing partition plate B and the sealing partition plate C, between the sealing partition plate C and the sealing partition plate D and between the sealing partition plate D and the sealing partition plate A respectively, a plurality of direct-fired air ducts are assembled on the bottom end part of the furnace shell along the tangential direction, the annular air supply duct is assembled on the bottom end part of the furnace shell and positioned at the same horizontal position outside the plurality of direct-fired air ducts, and the annular air supply duct is communicated with the combustion hearth by the plurality of direct-fired air ducts; the air supply pipe communicates the annular hot air duct with the annular air supply duct; a cold air inlet is arranged on the outer wall of the annular hot air duct; the last sealed I section of annular hot-blast main is with cold wind import and the air inlet end intercommunication of back fire relief back pipe, seals II section and with the telescopic air-out end of board-like back-fire relief and blast pipe air inlet end intercommunication, seals III section and with the air-out end of back fire relief back pipe and the air inlet end intercommunication of back-fire relief front-end pipe, seals IV section and with the telescopic air inlet end intercommunication of air-out end and board-like back-fire relief of back-fire relief front-end pipe.

The utility model conveys air heated by partial hot smoke generated in the combustion hearth after the straw bag starts to burn into the combustion hearth to preheat the straws which are sequentially burned layer by layer and ready to enter the burning so as to play the roles of dehumidification and drying, reduces the water content of the straws, becomes the straws with basically consistent water content before the straws are burned, and finishes the removal and evaporation treatment of ice and snow carried in the straw bag.

Drawings

FIG. 1 is a schematic view of the general structure of a straw bale direct-fired gasification hot-blast stove;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

fig. 4 is a sectional view taken along line C-C of fig. 1.

Description of part numbers in the figures:

1. the device comprises a furnace shell, 2, a direct-fired air pipe, 3, an annular air supply duct, 4, an air supply pipe, 5, a back fire-retardant pipe, 6, an annular hot air duct, 7, a plate type fire-retardant sleeve, 8, a spark distribution disc, 9, a hot flue gas guide plate, 10, a gas-gas heat exchanger, 11, a flue, 12, a combustion hearth, 13, a communication hole, 14, a front fire-retardant pipe, 15, a straw bag feeding port, 16, sealing partition plates A and 17, sealing partition plates B and 18, sealing partition plates C and 19, sealing partition plates D and 20, a cold air inlet, 21, a sealing I section, 22, a sealing II section, 23, a sealing III section, 24 and a sealing IV section.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. A straw package direct combustion gasification hot blast stove comprises a stove shell 1, a branch spark plate 8 and a hot flue gas guide plate 9 are sequentially arranged on the upper side part in a combustion hearth 12 of the stove shell 1 from the bottom to the top, a flue 11 communicates the combustion hearth 12 with a gas-gas heat exchanger 10, a straw package feeding port 15 is arranged on the lower side part of the stove shell 1, a plate type fire retardant sleeve 7, a fire retardant rear pipe 5 and a fire retardant front pipe 14 are sequentially arranged in the combustion hearth 12 and below the branch spark plate 8 from the top to the bottom, an annular hot blast passage 6 is vertically arranged on the plate type fire retardant sleeve 7, a sealing clapboard A16, a sealing clapboard B17, a sealing clapboard C18 and a sealing clapboard D19 are sequentially arranged in the annular hot blast passage 6 along the circumferential direction, the annular hot air duct 6 is divided into a closed I section 21, a closed II section 22, a closed III section 23 and a closed IV section 24 between the sealing partition plate A16 and the sealing partition plate B17, the sealing partition plate B17 and the sealing partition plate C18, the sealing partition plate C18 and the sealing partition plate D19, and the sealing partition plate D19 and the sealing partition plate A16 respectively, a plurality of direct-fired air ducts 2 are assembled on the bottom end part of the furnace shell 1 along the tangential direction, the annular air supply duct 3 is assembled on the bottom end part of the furnace shell 1 and positioned at the same horizontal position outside the plurality of direct-fired air ducts 2 and contained at the same horizontal position, and the plurality of direct-fired air ducts 2 are used for communicating the annular air supply duct 3 with the combustion hearth 12; the blast pipe 4 is used for communicating the annular hot air duct 6 with the annular blast duct 3; a cold air inlet 20 is arranged on the outer wall of the annular hot air duct 6; the closed I section 21 on the annular hot air duct 6 communicates the cold air inlet 20 with the air inlet end of the fire-retardant rear pipe 5, the closed II section 22 communicates the air outlet end of the plate-type fire-retardant sleeve 7 with the air inlet end of the blast pipe 4, the closed III section 23 communicates the air outlet end of the fire-retardant rear pipe 5 with the air inlet end of the fire-retardant front pipe 14, and the closed IV section 24 communicates the air outlet end of the fire-retardant front pipe 14 with the air inlet end of the plate-type fire-retardant sleeve 7.

During operation, the whole bundle of straw bags are fed into the combustion furnace 12 from the straw bag feeding port 15 to be ignited and start to combust, and the generated hot flue gas sequentially passes through the gap between the front and rear fire- retardant pipes 14 and 5, the communicating hole 13 on the plate type fire-retardant sleeve 7, the spark plate 8, the hot flue gas guide plate 9 and the flue 11 to enter the gas-gas heat exchanger 10 to complete heat exchange operation. In the process that hot flue gas passes through a gap between the front and rear pipes 14 and 5 and the communicating hole 13 on the plate-type fire retardant sleeve 7, the hot flue gas heats the hot flue gas, at the moment, cold air fed from the cold air inlet 20 sequentially enters the combustion furnace 12 through the closed I section 21 in the annular hot air duct 6, the rear fire retardant pipe 5, the closed III section 23, the front fire retardant pipe 14, the closed IV section 24, the plate-type fire retardant sleeve 7, the closed II section 22, the air supply pipe 4, the annular air supply duct 3 and the direct combustion air pipe 2, and in the process, the cold air is heated into hot air flow by the hot flue gas for many times, and the hot air flow blows, dries and dehumidifies straw bags burning layer by layer in the combustion furnace 12 and supports combustion of the straw, so that the water content of the straw in the straw bags is reduced, and ice and snow are removed.

Claims (1)

1. The utility model provides a straw package direct combustion gasification hot blast stove, includes furnace casing (1) from supreme branch spark disc (8) and hot flue gas guide plate (9) of setting gradually down on the lateral part in the combustion furnace (12) of furnace casing (1), flue (11) will burn furnace (12) and gas-gas heat exchanger (10) intercommunication, and the straw package is sent into mouth (15) and is set up on furnace casing (1) lateral part down, its characterized in that: in combustion furnace (12), be located branch spark plate (8) below position department from last to installing board-like back fire relief sleeve (7) and back fire relief back pipe (5), back fire relief front-end mast (14) in proper order down board-like back fire relief sleeve (7) on set up a plurality of intercommunicating pores (13) plate-like back fire relief sleeve (7) and back fire relief back pipe (5), back fire relief front-end mast (14) same horizontal position outside position department contain installation annular hot air duct (6) install sealing spacer A (16), sealing spacer B (17), sealing spacer C (18) and sealing spacer D (19) along the circumferencial direction in annular hot air duct (6) in proper order, sealing spacer A (16) and sealing spacer B (17), sealing spacer B (17) and sealing spacer C (18), sealing spacer C (18) and sealing spacer D (19), The annular hot air duct (6) is divided into a closed I section (21), a closed II section (22), a closed III section (23) and a closed IV section (24) between a sealing partition plate D (19) and a sealing partition plate A (16), a plurality of direct-fired air ducts (2) are assembled on the bottom end part of the furnace shell (1) along the tangential direction, the annular air supply duct (3) is assembled on the bottom end part of the furnace shell (1) and positioned at the same horizontal position outside the plurality of direct-fired air ducts (2), and the annular air supply duct (3) is communicated with the combustion hearth (12) by the plurality of direct-fired air ducts (2); the air supply pipe (4) is used for communicating the annular hot air duct (6) with the annular air supply duct (3); a cold air inlet (20) is arranged on the outer wall of the annular hot air duct (6); the air outlet end intercommunication of cold wind import (20) and back fire relief pipe (5) is closed in II section (22) with the air-out end and blast pipe (4) air inlet end intercommunication of board-like back fire relief sleeve (7) to sealed I section (21) on annular hot-blast main (6), and the air outlet end and the air inlet end intercommunication of back fire relief front-guard (14) of back fire relief pipe (5) are closed in III section (23), and the air outlet end and the air inlet end intercommunication of board-like back fire relief sleeve (7) of back fire relief front-guard (14) of back fire relief pipe (14) are closed in IV section (24).

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