阅读说明：本技术 一种生物质气化炉 (Biomass gasification furnace ) 是由 曾志伟 程文丰 茹斌 宛政 郭泗勇 崔洁 孙立 于 2020-06-12 设计创作，主要内容包括：本发明提供了一种生物质气化炉包括：气化炉炉体；炉篦,所述炉篦设于所述气化炉炉体内；支撑体,所述支撑体设于所述气化炉炉体内下部,且所述支撑体与所述炉篦固定连接并用于支撑所述炉篦；驱动机构,所述驱动机构用于驱动所述支撑体与所述炉篦旋转；传动轴,所述传动轴连接所述支撑体与所述驱动机构；密封槽,所述密封槽设于所述气化炉炉体外部下方,与所述气化炉炉体的底部密封连接,且套设于所述传动轴上,所述支撑体与所述气化炉炉体接触的部分位于所述密封槽槽口内。本发明采用两级密封方式,在气化炉炉底进行一级高温密封,在炉底下设密封槽,密封槽内注有密封水进行二级水封,确保系统密封性能。(The invention provides a biomass gasification furnace, which comprises: a gasification furnace body; the fire grate is arranged in the gasification furnace body; the support body is arranged at the lower part in the gasification furnace body, and is fixedly connected with the fire grate and used for supporting the fire grate; a drive mechanism for driving the support body and the grate to rotate; the transmission shaft is connected with the supporting body and the driving mechanism; the sealing groove is arranged below the outer part of the gasification furnace body, is connected with the bottom of the gasification furnace body in a sealing mode, and is sleeved on the transmission shaft, and the supporting body and the part, in contact with the gasification furnace body, of the supporting body are located in the groove opening of the sealing groove. The invention adopts a two-stage sealing mode, primary high-temperature sealing is carried out at the bottom of the gasification furnace, a sealing groove is arranged below the bottom of the gasification furnace, sealing water is injected into the sealing groove to carry out secondary water sealing, and the sealing performance of the system is ensured.)

1. A biomass gasification furnace, comprising:

a gasification furnace body;

the fire grate is arranged in the gasification furnace body;

the support body is arranged at the lower part in the gasification furnace body, and is fixedly connected with the fire grate and used for supporting the fire grate;

a drive mechanism for driving the support body and the grate to rotate;

the transmission shaft is connected with the supporting body and the driving mechanism;

the sealing groove is arranged below the outer part of the gasification furnace body, is connected with the bottom of the gasification furnace body in a sealing mode, and is sleeved on the transmission shaft, and the supporting body and the part, in contact with the gasification furnace body, of the supporting body are located in the groove opening of the sealing groove.

2. The biomass gasification furnace according to claim 1, wherein the sealing groove is filled with a sealing liquid, and the sealing liquid does not completely fill the sealing groove.

3. The biomass gasification furnace according to claim 1, wherein the transmission shaft is connected to a lower portion of the support body, and the transmission shaft is located on a central axis of the support body.

4. The biomass gasifier according to claim 1, wherein the grate is a conical grate with a central bulge.

5. The biomass gasifier according to claim 4, wherein the grate is provided with disturbance fins.

6. The biomass gasification furnace according to claim 1, further comprising an ash bearing table, wherein the ash bearing table is fixedly arranged on the inner wall of the gasification furnace body and is close to the lower part of the edge of the grate.

7. The biomass gasification furnace according to claim 6, further comprising an upper scraper disposed on the support body and located between the grate and the ash receiving platform for scraping off ash on the ash receiving platform.

8. The biomass gasification furnace according to claim 1, wherein an ash bin is arranged at the lower part of the gasification furnace body, an ash outlet is arranged at the bottom of the ash bin, and ash generated by reaction in the gasification furnace body is discharged from the ash outlet; and a gas outlet is formed in the side surface of the gasifier body, and gasified gas generated by reaction in the gasifier body is discharged from the gas outlet.

9. The biomass gasification furnace according to claim 8, further comprising a lower scraper disposed on the support body at a position close to the ash outlet for scraping ash to the ash outlet.

Background

The biomass is a clean, abundant and only carbon-containing renewable energy source, can well solve the world problems of energy shortage and environmental pollution, and is increasingly widely concerned. The thermochemical utilization of biomass is to perform combustion, pyrolysis, gasification and other treatments on biomass under high temperature conditions to obtain products such as heat, electricity or combustible gas, wherein the biomass gasification technology has the advantages of rapid reaction, high conversion efficiency, flexible end products, easy industrialization and the like, and has become a key point of world research. The biomass gasification technology mainly comprises fluidized bed gasification and fixed bed gasification. The common fixed bed gasification furnaces are divided into an updraft type gasification furnace, a downdraft type gasification furnace, an open-center type gasification furnace and the like, and compared with updraft type gasification technologies and other gasification technologies, the downdraft type fixed bed gasification furnace is relatively low in tar content, but the requirements of terminal power generation are still difficult to meet, and further improvement is needed.

Disclosure of Invention

In order to overcome the technical problems in the prior art, the invention provides a biomass gasification furnace, which comprises: a biomass gasification furnace, comprising:

a gasification furnace body;

the fire grate is arranged in the gasification furnace body;

the support body is arranged at the lower part in the gasification furnace body, and is fixedly connected with the fire grate and used for supporting the fire grate;

a drive mechanism for driving the support body and the grate to rotate;

the transmission shaft is connected with the supporting body and the driving mechanism;

the sealing groove is arranged below the outer part of the gasification furnace body, is connected with the bottom of the gasification furnace body in a sealing mode, and is sleeved on the transmission shaft, and the supporting body and the part, in contact with the gasification furnace body, of the supporting body are located in the groove opening of the sealing groove.

Preferably, the sealing groove is filled with sealing liquid, and the sealing groove is not completely filled with the sealing liquid.

Preferably, the transmission shaft is connected to the lower part of the support body, and the transmission shaft is located on the central axis of the support body.

Preferably, the grate is a conical grate with a convex middle part.

Further preferably, disturbance ribs are arranged on the grate.

Preferably, the biomass gasification furnace provided by the invention further comprises an ash bearing table, wherein the ash bearing table is fixedly arranged on the inner wall of the gasification furnace body and is close to the lower part of the edge of the fire grate.

Further preferably, the biomass gasification furnace provided by the invention further comprises an upper ash scraping knife, wherein the upper ash scraping knife is arranged on the support body and is positioned between the grate and the ash bearing platform, and is used for scraping ash on the ash bearing platform.

Preferably, an ash bin is arranged at the lower part of the gasification furnace body, an ash outlet is arranged at the bottom of the ash bin, and ash slag generated by reaction in the gasification furnace body is discharged from the ash outlet; and a gas outlet is formed in the side surface of the gasifier body, and gasified gas generated by reaction in the gasifier body is discharged from the gas outlet.

Further preferably, the biomass gasification furnace provided by the invention further comprises a lower ash scraping knife, and the lower ash scraping knife is arranged on the support body and close to the ash outlet and is used for scraping ash to the ash outlet.

The rotary fire grate structure design adopted by the invention enables the fire grate to continuously discharge ash for operation, can effectively solve the problem that the traditional fire grate causes the whole periodic fluctuation of the biomass gasification system due to intermittent ash discharge, improves the continuity and stability of the whole operation of the system and increases the whole efficiency of the system. In the invention, in order to ensure the sealing performance of the biomass gasification furnace system, a two-stage sealing mode is adopted, the primary high-temperature sealing is carried out at the bottom of the gasification furnace, a sealing groove is arranged below the bottom of the gasification furnace, sealing water is injected into the sealing groove to carry out secondary water sealing, and air is ensured not to enter the furnace. In addition, the combined action of the upper ash scraper and the lower ash scraper can ensure that ash generated by reaction can be discharged out of the furnace body in time, so that the accumulation of the ash in the furnace is avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the apparatus and method consistent with the invention and, together with the detailed description, serve to explain the advantages and principles consistent with the invention.

Fig. 1 is a schematic sectional view of a biomass gasification furnace according to an embodiment of the present invention.

Description of the reference numerals

1-a gasification furnace body;

2, mounting a scraper;

3-ash bearing platform;

4-air outlet;

5-lower scraper;

6-sealing groove;

7-a drive mechanism;

8-a raw material layer;

9-disturbance fins;

10-grate;

11-a support;

12-ash bin;

13-ash outlet;

14-sealing liquid;

15-a transmission shaft.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other, and the technical idea of the present invention may be implemented in combination with other known techniques or other techniques identical to those known techniques.

Referring to fig. 1, the present embodiment provides a biomass gasification furnace including:

a gasification furnace body 1;

the fire grate 10 is arranged in the gasification furnace body 1;

the supporting body 11 is arranged at the lower part in the gasification furnace body 1, and the supporting body 11 is fixedly connected with the fire grate 10 and is used for supporting the fire grate 10;

a driving mechanism 7, wherein the driving mechanism 7 is used for driving the supporting body 11 and the grate 10 to rotate;

a transmission shaft 15, wherein the transmission shaft 15 connects the support body 11 and the driving mechanism 7;

the sealing groove 6 is formed in the lower portion outside the gasification furnace body 1, is connected with the bottom of the gasification furnace body 1 in a sealing mode, and is sleeved on the transmission shaft 15, and the supporting body 11 and the portion, in contact with the gasification furnace body 1, of the sealing groove are located in the groove opening of the sealing groove 6.

Preferably, the sealing groove 6 is filled with a sealing liquid 14, and the sealing liquid 14 does not completely fill the sealing groove 6.

In this embodiment, biomass raw material and gasification medium get into from the gasifier top, biomass raw material falls and forms raw material layer 8 on the grate, gasification medium is even through raw material layer 8 and takes place redox reaction with the raw materials and generate gasification gas and biomass ash, for example, biomass raw material can be the saw-dust granule, gasification medium can be air etc., the temperature of raw material layer 8 is about 800 ℃ this moment, the rotational speed through actuating mechanism 7 adjustment grate 10, guarantee that gasification furnace system's feed quantity and discharge capacity are equal, maintain 8 high 80cm on the raw material layer about, the in-process of gasification furnace system operation, gasifier furnace body 1 internal pressure fluctuation scope is less than 100pa, the operating mode is continuous stable.

Preferably, the transmission shaft 15 is connected to a lower portion of the supporting body 11, and the transmission shaft 15 is located on a central axis of the supporting body 11. By adopting a central transmission mode, the transmission shaft 15 can transmit the power provided by the driving mechanism 7 to the supporting body 11 more uniformly, so that the supporting body 11 rotates stably.

Preferably, the grate 10 is a conical grate with a convex middle part, so that ash generated by reaction can conveniently slide down.

It is further preferred that the grate 10 is provided with disturbance fins 9 for uniform distribution of the raw material layer 8 to ensure uniform contact of the gasification medium with the raw material.

Preferably, the biomass gasification furnace provided by the invention further comprises an ash bearing table 3, wherein the ash bearing table 3 is fixedly arranged on the inner wall of the gasification furnace body 1 and is close to the lower part of the edge of the fire grate 10.

Further preferably, the biomass gasification furnace provided by the invention further comprises an upper ash scraping knife 2, wherein the upper ash scraping knife 2 is arranged on the support body 11 and is positioned between the grate 10 and the ash bearing table 3, and is used for scraping off ash on the ash bearing table 3.

Preferably, an ash bin 12 is arranged at the lower part of the gasification furnace body 1, an ash outlet 13 is arranged at the bottom of the ash bin 12, and ash slag generated by reaction in the gasification furnace body 1 is discharged from the ash outlet 13; the side of the gasification furnace body 1 is provided with an air outlet 4, and gasified air generated by reaction in the gasification furnace body 1 is discharged from the air outlet 4.

Further preferably, the biomass gasification furnace provided by the invention further comprises a lower ash scraping knife 5, wherein the lower ash scraping knife 5 is arranged on the support body 11 and close to the ash outlet 13, and is used for scraping ash to the ash outlet 13.

Ash slag generated by reaction in the gasification furnace body 1 slides down to the ash bearing table 3 along the grate 10, and the ash slag on the ash bearing table 3 can be scraped off due to the co-rotation of the upper ash scraping knife 2 along with the support body 11, and falls into an ash bin 12 at the lower part of the gasification furnace body 1; because the lower ash scraping knife 5 rotates together with the supporting body 11, ash in the ash bin can be scraped to the ash outlet 13 and discharged out of the gasifier body.

Preferably, the driving mechanism 7 is a pair of engaged bevel gears and is driven by a motor. The motor can be connected with the transmission shaft 15 through a chain, the transmission shaft 15 penetrates through the furnace bottom of the gasification furnace body 1 and is connected with the bottom of the supporting body 11, and the transmission shaft 15 drives the furnace grate 10 to rotate by driving the supporting body 11 to rotate.

The rotary fire grate structure design adopted by the invention enables the fire grate 10 to continuously discharge ash for operation, can effectively solve the problem that the traditional fire grate causes the whole periodic fluctuation of a biomass gasification system due to intermittent ash discharge, improves the continuity and stability of the whole operation of the system, and increases the whole efficiency of the system. In the invention, in order to ensure the sealing performance of the biomass gasification furnace system, a two-stage sealing mode is adopted, the primary high-temperature sealing is carried out at the bottom of the gasification furnace, a sealing groove 6 is arranged below the bottom of the gasification furnace, and sealing liquid 14 is injected into the sealing groove 6 to carry out secondary water sealing, so that gasified gas and other impurity gases generated by reaction are prevented from leaking. In addition, the combined action of the upper ash scraper and the lower ash scraper can discharge ash generated by reaction out of the furnace body in time, so that the accumulation of the ash in the furnace is avoided. .

The terms "first" and "second" as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, unless otherwise specified. Similarly, modifiers similar to "about", "approximately" or "approximately" that occur before a numerical term herein typically include the same number, and their specific meaning should be read in conjunction with the context. Similarly, unless a specific number of a claim recitation is intended to cover both the singular and the plural, and also that claim may include both the singular and the plural.

In the description of the specific embodiments above, the use of the directional terms "upper", "lower", "left", "right", "top", "bottom", "vertical", "transverse", and "lateral", etc., are for convenience of description only and should not be considered limiting.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.