CN112011369B

CN112011369B - Gasification furnace for straw energy conversion

Info

Publication number: CN112011369B
Application number: CN202010954128.7A
Authority: CN
Inventors: 李卫
Original assignee: Suixi Chuxin Industrial Design Co Ltd
Current assignee: Jiangsu Taihu Boiler Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-05-18
Anticipated expiration: 2040-09-11
Also published as: CN112011369A

Abstract

The invention relates to the technical field of biomass energy, and discloses a gasification furnace for straw energy conversion. Through the setting of fixed cover and heating pipe, make the produced gas of straw insufficient combustion loop through between fixed cover and the combustion chamber, and with the heating pipe after-contact, be detained in getting into fixed case, in this process, the inside of the produced leading-in heating pipe of heat of combustion chamber burning, the combustible gas who lets in between fixed cover and the combustion chamber keeps warm and heats, make tar continuous schizolysis, the heating pipe can act as the catalyst, reduce tar cracking temperature, increase tar cracking efficiency, reduce the content of tar in the gas, simultaneously through piston and compression spring's setting, make and get into fixed case gas and accumulate gradually, pressure constantly increases, the temperature continuously increases, effectively improve tar cracking temperature.

Description

Gasification furnace for straw energy conversion

Technical Field

The invention relates to the technical field of biomass energy, in particular to a gasification furnace for straw energy conversion.

Background

The biomass gasification furnace utilizes biomass such as crop straws and forestry wastes with low calorific value to generate combustible gas such as carbon monoxide, hydrogen, methane and the like through thermophysical change and chemical reaction in the gasification furnace, the straw (i.e. biomass) gasification aims to obtain combustible gas products as much as possible, but coke, tar and other byproducts are inevitably generated in the gasification process, wherein the tar is in a gaseous state at high temperature and is completely mixed with the combustible gas, and the tar is condensed into a liquid state at low temperature (generally lower than 200 ℃), so the currently used biomass gasification furnace has some problems as follows:

when the biomass gasification furnace is used for converting biomass into combustible gas, wherein the produced gas contains tar with higher content, so that the carbon utilization rate is low, the gasification efficiency is reduced, meanwhile, when the gas is transmitted in a pipeline, the gas temperature is reduced to below 200 ℃, the tar can be condensed into fine liquid drops, the liquid drops are easily combined with water, coke and the like, on one hand, the pipeline and equipment are blocked, on the other hand, the tar condensed into the fine liquid drops is difficult to burn out than the gas, and particles such as carbon black are easily generated during combustion, so that secondary pollution is caused.

Disclosure of Invention

The invention provides a gasification furnace for straw energy conversion, which has the advantages of high conversion efficiency and low pollution and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a gasification furnace for straw energy conversion, includes fixed case, some firearm and compression jar, the right side fixed mounting of fixed case has the air guide case, the inner chamber top fixed mounting of air guide case has the air guide cylinder, the piston has been cup jointed to the activity in the air guide cylinder, its right side movable mounting who is located the piston has compression spring in the air guide cylinder, compression spring's both ends respectively with the inner wall of air guide case and the right side fixed connection of piston, the inner chamber top fixed mounting of fixed case has fixed cover, the even fixed mounting in inside of fixed cover has the heating pipe, the one end fixedly connected with combustion chamber of heating pipe, the bottom of combustion chamber and the bottom fixed connection of fixed case, fixed mounting has heating device in the inner chamber of combustion chamber, heating device's inner chamber passes through trachea and compression jar intercommunication on right side, just be located heating device's below fixed mounting in the inner chamber of combustion chamber and keep off the ash block, the utility model discloses a compression tank, including combustion chamber, ash blocking block, air guide box, compression jar, air guide cylinder, air guide box and air guide cylinder, the below fixed mounting that just is located ash blocking block on the combustion chamber has the vent, movable mounting has feed arrangement directly over the top of fixed case and being located the combustion chamber, the through-hole with the compression jar intercommunication is seted up to air guide box's right side bottom, the through-hole has been seted.

Preferably, feed arrangement includes a feeding section of thick bamboo, the last activity joint of a feeding section of thick bamboo has first baffle, the top of a feeding section of thick bamboo and the top activity joint that is located first baffle have the second baffle, the both sides of a feeding section of thick bamboo and the below movable mounting who is located first baffle have the backup pad.

Preferably, the feeding cylinder is divided into an upper part and a lower part, the upper part of the feeding cylinder is square, the lower part of the feeding cylinder is round, and the first partition plate and the second partition plate are both square.

Preferably, the heating pipes are 5-9 groups in total and distributed at intervals, are hollow and are communicated with the inside of the combustion chamber, and are made of dolomite.

Preferably, the bottom of the combustion chamber and the inside of the fixed box are hemispherical.

The invention has the following beneficial effects:

1. through the setting of fixed cover and heating pipe, make the produced gas of straw insufficient combustion loop through between fixed cover and the combustion chamber, and with the heating pipe after-contact, be detained in getting into fixed case, in this process, the inside of the produced heat of combustion chamber burning leading-in heating pipe, the combustible gas who lets in between fixed cover and the combustion chamber keeps warm and heats, make tar continuous schizolysis, the heating pipe can act as the catalyst, reduce tar cracking temperature, increase tar cracking efficiency, reduce the content of tar in the gas, simultaneously through piston and compression spring's setting, make and get into fixed case gas accumulation gradually, pressure constantly increases, the temperature continuously increases, effectively improve tar cracking temperature, and increase gaseous detention time, increase the reaction time who refuels the schizolysis, further reduce the tar content in the gas.

2. Through feed arrangement's setting, make and to pack into first baffle and the second between the baffle with kibbling straw, the first baffle of pulling, can make the straw directly fall into the combustion chamber and burn, the second baffle is isolated combustion chamber and external, prevent that the air from getting into in a large number in the combustion chamber, cause the straw abundant combustion, lead to the energy to scatter and disappear, and, when pulling open the backup pad, make the feed cylinder descend, be connected with the combustion chamber, and pull open first baffle and second baffle, make the straw abundant combustion in the combustion chamber, make the temperature in the combustion chamber reach tar schizolysis's temperature fast in the short time, can avoid the gas after the abundant combustion to get into in fixed case and the fixed cover simultaneously, reduce the gaseous impurity of combustible gas in the compression jar, improve its energy ratio.

Drawings

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

FIG. 2 is a schematic top view of the structure of the present invention;

FIG. 3 is a schematic side view of the structure of the present invention;

FIG. 4 is a top partial schematic view of the structure of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 1.

In the figure: 1. a fixed box; 2. an air guide box; 3. an air guide cylinder; 4. a piston; 5. a compression spring; 6. a fixed cover; 7. heating a tube; 8. a combustion chamber; 9. a heating device; 10. a dust blocking block; 11. a vent; 12. a feeding device; 121. a feeding cylinder; 122. a first separator; 123. a second separator; 124. and a support plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a gasification furnace for energy conversion of straw comprises a fixed box 1, an igniter and a compression tank, wherein an air guide box 2 is fixedly installed on the right side of the fixed box 1, an air guide cylinder 3 is fixedly installed on the top of an inner cavity of the air guide box 2, a piston 4 is movably sleeved in the air guide cylinder 3, a compression spring 5 is movably installed on the right side of the piston 4 in the air guide cylinder 3, two ends of the compression spring 5 are respectively and fixedly connected with the inner wall of the air guide box 2 and the right side of the piston 4, a fixed cover 6 is fixedly installed on the top of the inner cavity of the fixed box 1, heating pipes 7 are uniformly and fixedly installed in the fixed cover 6, one end of each heating pipe 7 is fixedly connected with a combustion chamber 8, the bottom end of each combustion chamber 8 is fixedly connected with the bottom of the fixed box 1, a heating device 9 is fixedly installed in the inner cavity of, an ash blocking block 10 is fixedly arranged in the inner cavity of the combustion chamber 8 and below the heating device 9, a ventilation opening 11 is fixedly arranged on the combustion chamber 8 and below the ash blocking block 10, a feeding device 12 is movably arranged at the top of the fixed box 1 and right above the combustion chamber 8, a through hole communicated with the compression tank is formed in the bottom of the right side of the air guide box 2, and a through hole is formed in the middle of the air guide cylinder 3.

Wherein, the feeding device 12 comprises a feeding cylinder 121, a first clapboard 122 is movably clamped on the feeding cylinder 121, a second clapboard 123 is movably clamped on the top of the feeding cylinder 121 and positioned above the first clapboard 122, a support plate 124 is movably arranged on two sides of the feeding cylinder 121 and positioned below the first clapboard 122, crushed straws are loaded between the first clapboard 122 and the second clapboard 123, the first clapboard 122 is pulled to enable the straws to directly fall into the combustion chamber 8 for combustion, meanwhile, the combustion chamber 8 is isolated from the outside by the second clapboard 123, so that a large amount of air is prevented from entering the combustion chamber 8, the straws are fully combusted, energy is dissipated, when the support plate 124 is pulled, the feeding cylinder 121 is lowered and connected with the combustion chamber 8, and the first clapboard 122 and the second clapboard 123 are pulled, so that the straws are fully combusted in the combustion chamber 8, and the temperature in the combustion chamber 8 can quickly reach the temperature of tar cracking in a short time, meanwhile, gas after being fully combusted can be prevented from entering the fixed box 1 and the fixed cover 6, impurities of combustible gas in the compression tank are reduced, and the energy ratio of the compression tank is improved.

Wherein, the feed cylinder 121 divide into two parts from top to bottom, and the upper portion of feed cylinder 121 is square, and the lower part of feed cylinder 121 is circular, and first baffle 122 is square with second baffle 123, cooperatees with first baffle 122 and second baffle 123, is convenient for open and seal feed cylinder 121, and the latter half can agree with mutually with combustion chamber 8 simultaneously, increases the gas tightness.

Wherein, the heating pipe 7 is total 5-9 groups, and for the interval distribution, heating pipe 7 is cavity to communicate with the inside of combustion chamber 8, and heating pipe 7 is made by dolomite, can be with the inside of the leading-in heating pipe 7 of the produced heat of 8 combustions of combustion chamber for to keeping warm and heating the combustible gas who lets in between fixed cover 6 and the combustion chamber 8, heating pipe 7 can act as the catalyst simultaneously, reduces tar cracking temperature, increases tar cracking efficiency.

Wherein, the bottom of combustion chamber 8 just is located the inside of fixed case 1 and is the hemisphere for ashes after the burning falls into wherein, with remaining heat transfer to fixed case 1 in, heat the inside of fixed case 1, in order to increase the inside pressure of fixed case 1.

The working principle is that the straw is heated primarily, the supporting plate 124 is pulled open, the feeding cylinder 121 descends to be combined with the combustion chamber 8, the first partition plate 122 and the second partition plate 123 are pulled open, then the straw is directly sent into the combustion chamber 8, meanwhile, gas in the compression tank is led into the heating device 9, the straw is ignited by the igniter and is ignited, the straw is fully combusted, the temperature in the combustion chamber 8 is rapidly enabled to reach more than 750 ℃ in a short time, and then the heating device 9 is turned off; then the feeding cylinder 121 is pulled up, the first partition plate 122 and the second partition plate 123 are pushed rightwards, the channel of the feeding cylinder 121 is sealed, the crushed straw is filled between the first partition plate 122 and the second partition plate 123, the first partition plate 122 is pulled, the straw can directly fall into the combustion chamber 8 to be insufficiently combusted, combustible gas is generated, the combustible gas rises from the combustion chamber 8 and then enters the space between the fixed cover 6 and the combustion chamber 8, and contacts with the heating pipe 7, so that tar in the gas is cracked, and then the gas enters the fixed box 1 to be retained. Along with the increase of time, the more the gas is accumulated, the pressure in the fixed box 1 is increased, the piston 4 is pushed to move leftwards, the compression spring 5 is compressed, after the piston 4 moves to the through hole position on the gas guide cylinder 3, the gas in the fixed box 1 is rapidly transferred into the gas guide cylinder 2, the pressure in the fixed box 1 is reduced, the compression spring 5 pushes the piston 4 rightwards to block the through hole on the gas guide cylinder 3, after the gas is cooled for a period of time in the gas guide cylinder 2, the gas is sucked from the through hole at the bottom by the compression tank, a certain amount of oxygen is required to be supplied for combustion in the fixed cover 6, and then the oxygen is supplied to the inside of the fixed cover 6 from the vent hole 11.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gasification furnace is used in straw energy conversion, includes fixed case (1), some firearm and compression jar, its characterized in that: the right side fixed mounting of fixed case (1) has air guide case (2), the inner chamber top fixed mounting of air guide case (2) has inflator (3), piston (4) has been cup jointed in the activity of inflator (3), its right side movable mounting who is located piston (4) has compression spring (5) in inflator (3), the both ends of compression spring (5) respectively with the inner wall of air guide case (2) and the right side fixed connection of piston (4), the inner chamber top fixed mounting of fixed case (1) has fixed cover (6), the even fixed mounting in inside of fixed cover (6) has heating pipe (7), the one end fixed connection of heating pipe (7) has combustion chamber (8), the bottom of combustion chamber (8) and the bottom fixed connection of fixed case (1), fixed mounting has heating device (9) in the inner chamber of combustion chamber (8), the inner chamber of the heating device (9) is communicated with the compression tank through an air pipe on the right side, an ash blocking block (10) is fixedly arranged in the inner chamber of the combustion chamber (8) and is positioned below the heating device (9), a ventilation opening (11) is fixedly arranged on the combustion chamber (8) and is positioned below the ash blocking block (10), a feeding device (12) is movably arranged at the top of the fixed box (1) and is positioned right above the combustion chamber (8), the feeding device (12) comprises a feeding barrel (121), a first partition plate (122) is movably clamped on the feeding barrel (121), a second partition plate (123) is movably clamped at the top of the feeding barrel (121) and is positioned above the first partition plate (122), supporting plates (124) are movably arranged on the two sides of the feeding barrel (121) and is positioned below the first partition plate (122), and the feeding barrel (121) is divided into an upper part and a lower part, the upper portion of a feeding cylinder (121) is square, the lower portion of the feeding cylinder (121) is circular, a first partition plate (122) and a second partition plate (123) are square, a through hole communicated with a compression tank is formed in the bottom of the right side of an air guide box (2), and a through hole is formed in the middle of an air guide cylinder (3).

2. The gasification furnace for straw energy conversion as claimed in claim 1, wherein: the heating pipes (7) are 5-9 groups in total and distributed at intervals, the heating pipes (7) are hollow and are communicated with the inside of the combustion chamber (8), and the heating pipes (7) are made of dolomite.

3. The gasification furnace for straw energy conversion as claimed in claim 1, wherein: the bottom of the combustion chamber (8) is positioned in the fixed box (1) and is hemispherical.