CN2476718Y

CN2476718Y - Thermal insulation water adding type straw gasification furnace

Info

Publication number: CN2476718Y
Application number: CN01239853U
Authority: CN
Inventors: 胡兆源; 李瑛�; 皇甫利
Original assignee: 胡兆源; 李瑛�; 皇甫利
Current assignee: ZHENGZHOU SHENGRUN BIOMASS ENERGY AND CHEMICAL RESEARCH INSTITUTE
Priority date: 2001-04-19
Filing date: 2001-04-19
Publication date: 2002-02-13
Anticipated expiration: 2011-04-19

Abstract

The utility model relates to a heat preservation water adding straw gasification furnace which is used for straw gasification. The structure of the utility model is that an internal furnace is arranged in an external shell. A feed hopper is arranged on the upper part of the shell. An air hole is arranged on the middle part of the internal furnace. The air hole communicates with a mixture room. A steam heating room is arranged on the lower part of the mixture room wherein the steam heating room communicates with the mixture room. An air preheating sleeve is arranged on the external shell. An exhaust tube is arranged on the external shell running through the preheating sleeve. A fire grate and a water heating ring are arranged on the bottom of the internal furnace. A hot wind inlet is arranged on the fire wall of the mixture room. A cold wind inlet is arranged on the preheating sleeve. A water supplement bucket is connected with the water heating ring through a pipe. The utility model has advantages of new, unique and simple structure, good application effect, heat preservation. The utility model enhances the internal temperature of furnace and the content of combustible gas. The utility model has wide promotion and application prospects.

Description

Thermal insulation water-adding type straw gasification furnace

The utility model relates to a heat-preservation water-adding type straw gasification furnace for straw gasification.

The straw gasification is that the crop straw is burned and cracked under the anoxic state, so that the hydrocarbon in the biomass is converted into combustible gas such as carbon monoxide, hydrogen, methane and the like. As known, the main component of the biomass straw is carbon C, one part of the biomass straw generates CO gas and the other part generates CO gas due to oxygen-deficient combustion in a gasification furnace₂The rest of straw is heated to form carbon, and the hot carbon reacts with water to generate CO gas and hydrogen (H)₂) In addition, the straws generate methane CH in the dry distillation process₄And (4) qi. The generated combustible gas is discharged by an external exhaust fan and is sent to a user after dust removal, temperature reduction and decoking treatment.

In general, the straw can produce combustible gas directly into CO in the combustion process₂The gas gives off heat, therefore, in order to make the combustible gas burn as little as possible, generally adopt at present to control the air admission amount and realize, however, because the reaction state in the straw gasification process is very complicated, the air admission amount is artificially controlled, it is difficult to grasp the microcosmic change in the reaction, so, the gasifier commonly used at present is difficult to effectively improve the gas content.

The utility model aims at providing a novel heat preservation water adding type knot pole gasifier can solve control air admission well, increases the problem of combustible gas content.

The utility model aims at realizing like this, improve on current gasifier structure basis, regard as water heater with seamless steel pipe, adopt the fire-resistant material cast's that thickness is big stove courage, thereby it is big to constitute the heating area, the temperature is high, it is thermal-insulated to have, heat retaining novel straw gasifier, concrete structure is that the fire-resistant material stove courage dress is in the shell, upper portion has the loading hopper, there is the gas pocket on the fire-resistant material stove courage middle part, the gas pocket communicates with each other with the mixing chamber, the mixing chamber lower part has communicating vapour heating chamber, there is air preheating sleeve on the shell, it is equipped with the exhaust tube on the shell to pass preheating sleeve, there are grate and water heating ring stove courage bottom, there is hot-blast entry on mixing chamber department oven, there is the cold wind import on preheating sleeve, water heating ring.

The utility model discloses novel structure, simple, excellent in use effect keeps warm, improves the interior temperature of stove, both can add the water of control in red-hot carbon chamber, can improve the calorific value and the content of gas again, has wide popularization and application prospect.

The structure of the present invention will be described in detail below with reference to the accompanying drawings.

The attached drawing is the structure section front view of the utility model.

The utility model is shown in figure 1, the utility model is a big improvement to the structure of the existing gasification furnace, the structure is that the furnace pipe is arranged in the shell, the inner cavity of the refractory material furnace pipe 7 made of refractory material is provided with an air hole 5 communicated with the steam-air mixing chamber 6 at the middle part in the shell 2, the shell 2 at the upper part of the furnace pipe opening is provided with a feeding hopper 1, the steam-air mixing chamber 6 is communicated with the air preheating sleeve 3 outside the wall of the shell 2 through a hot air inlet 13, the lower part of the mixing chamber 6 is provided with a communicated steam heating chamber 8, an exhaust tube 4 is arranged on the shell 2 after passing through the air preheating sleeve 3, the bottom of the refractory material furnace pipe 7 is provided with a fire grate 9, the lower part of the fire grate is provided with a water heating ring 10 communicated with the steam heating chamber 8, the water heating ring 10 is communicated with a water replenishing hopper 11.

The working condition of the utility model is that the straw is burned in the gasification furnace under the action of the exhaust fan through the air exhaust pipe orifice, when the gas passes through the heating water ring, the water is heated into steam, the steam enters the upper steam heating chamber for further heating, the temperature is raised to more than 300 ℃, and then the steam enters the steam-air mixing chamber; in addition, the lower part of the air preheating sleeve is provided with a plurality of cold air inlets, the air discharged from the gasification furnace passes through the air preheating sleeve and then is discharged, the air is heated, the heated air enters the steam-air mixing chamber and is mixedThe combined air vapor enters the carbon room from a plurality of air holes in the middle of the refractory furnace pipe to take part in the reaction. The reactions in the gasifier are: ；， however, the reaction is affected by adding a little water. Based on multiple research experiments, phi can be used

The seamless steel pipe is used as a water heater. Therefore, the heating area of the water heater is controlled, and the steam temperature is increased, namely the heating is completed by the heating chamber with large heating area.

In the reaction, in order to make the air as little as possible, the furnace can be cast by adopting the refractory material with larger thickness, the thinnest part of the furnace is 70mm, because the thicker furnace has the performance of heat insulation and moisture preservation, the heat dissipation capacity of the furnace body is greatly reduced, the temperature is improved, the expansion coefficient of steam, air and generated combustible gas entering the furnace is increased, the pressure in the furnace is relatively improved, and the pressure is slightly negative or even no negative, thus the entering amount of external air is greatly reduced, the combustion of the combustible gas is inhibited, and the content of the combustible gas is increased.

In a word, the utility model adopts the refractory material furnace pipe, increases the thickness of the furnace pipe, improves the temperature in the furnace pipe, adds controllable water in the glowing carbon room, improves the fuel gas heat value, increases the novel straw gasification furnace of combustible gas content, is an innovation to the existing straw gasification furnace, and the heat value can be changed by 4200KJ/M³Increased to 5826KJ/M³Far higher than the national regulation standard. Has wide popularization and application prospect.

Claims

1, a heat-preservation water-adding straw gasification furnace is characterized in that a furnace pipe is arranged in a shell, and an inner cavity of a refractory material furnace pipe (7) is provided with an air hole (5) communicated with a steam-air mixing chamber (6) in the middle of the inner part of the shell (2), a feeding hopper (1) is arranged on the shell (2) at the upper part of a furnace pipe opening, the steam-air mixing chamber (6) is communicated with an air preheating sleeve (3) outside the wall of the shell (2) through a hot air inlet (3), a communicated steam heating chamber (8) is arranged at the lower part of the mixing chamber (6), an exhaust pipe (4) is arranged on the shell (2) through the air preheating sleeve (3), a fire grate (9) is arranged at the bottom of the refractory material furnace pipe (7), a water heating ring (10) communicated with the steam heating chamber (8) is arranged at the lower part of the fire grate, the water heating ring (10) is communicated with a water replenishing hopper (11) arranged outside the furnace.