Biomass fluidized bed gasifier

Abstract

The utility model discloses a biomass fluidized bed gasification furnace, which relates to the technical field of biomass gasification furnaces, and comprises a main body furnace and a blocking mechanism, the blocking mechanism for blocking impurities is arranged at the upper part in the main body furnace, and the blocking mechanism comprises a blocking plate, a rotating shaft, an air hole, a lifting cylinder, a movable head and a limiting sliding seat, a rotating shaft is installed at one end of the blocking plate, air holes are formed in the surface of the blocking plate, and a lifting air cylinder is arranged above the blocking plate. Compared with an existing device, the biomass fluidized bed gasification furnace has the advantages that impurity particles mixed in airflow can be blocked through cooperation of all parts of the blocking mechanism, the situation that impurities are brought out together with the airflow to affect the cleanliness of obtained fuel gas is avoided, and meanwhile the cleanliness of the obtained fuel gas is guaranteed while the impurities are blocked. And when the airflow is blocked, the air outlet efficiency can be guaranteed through opening, and meanwhile, the barrier plate moves up and down so that self-shaking cleaning can be conducted after work, so that follow-up use is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass gasifiers, in particular to a biomass fluidized bed gasifier. Background Art

[0002] The biomass gasifier uses the gasification medium as the fluidizing medium to make the biomass undergo a gasification reaction in a suspended flow state. With the continuous development and innovation of the biomass gasifier, the energy of the biomass gasifier can be better utilized. Since the raw materials of the biomass gasifier energy are abundant and the pollution to the environment is small, it occupies an important position in modern energy and has a very good development prospect.

[0003] When the existing gasifier is used, the fluidized gas is often discharged directly during the gas discharge, so that a certain amount of particulate impurities will be carried away. If the impurities cannot be blocked, the purity and quality of the fluidized gas will be affected.

[0004] Therefore, the existing structure and defects are studied and improved, and a biomass fluidized bed gasifier is provided, in order to achieve a more practical purpose. Utility Model Content

[0005] The utility model aims to provide a biomass fluidized bed gasifier to solve the problem that the existing gasifier mentioned in the above background technology is often in a straight-out state when the fluidized gas is used, so that a certain amount of particulate impurities will be taken away. If the impurities cannot be blocked, the purity and quality of the fluidized gas will be affected.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biomass fluidized bed gasification furnace, comprising a main furnace and a blocking mechanism, wherein a blocking mechanism for blocking impurities is arranged above the interior of the main furnace, and the blocking mechanism comprises a blocking plate, a rotating shaft, an air vent, a lifting cylinder, a movable head and a limiting slide, a rotating shaft is installed at one end of the blocking plate, and an air vent is opened on the surface of the blocking plate, a lifting cylinder is arranged above the blocking plate, a movable head is installed at the bottom end of the lifting cylinder, and a limiting slide is arranged below the movable head, and the limiting slide is fixedly connected to the blocking plate.

[0007] Furthermore, a feed port is connected to one side of the upper surface of the main furnace, and an air outlet is connected to the upper middle portion of the main furnace.

[0008] Furthermore, an air distribution mechanism for uniform air discharge is provided at the inner middle portion of the main furnace, and a slag discharge mechanism for impurity discharge is provided at the bottom of the main furnace.

[0009] Furthermore, the air distribution mechanism includes an air guide duct and an air distribution ring, and the front end of the air guide duct is connected to the air distribution ring.

[0010] Furthermore, the air distribution mechanism also includes an air outlet duct, and the air outlet duct is installed on the upper surface of the air distribution ring.

[0011] Furthermore, the slag discharge mechanism includes a slag collecting chamber, a rotating motor and a spiral shaft. The rotating motor is installed on one side of the outside of the slag collecting chamber, and the output end of the rotating motor is connected to the spiral shaft.

[0012] Compared with the prior art, the utility model provides a biomass fluidized bed gasifier, which has the following beneficial effects:

[0013] 1. The utility model can block the impurity particles mixed in the airflow through the cooperation between the various parts of the blocking mechanism, so as to prevent the impurities from being carried out together with the airflow and affecting the cleanliness of the obtained gas. At the same time, when the airflow is blocked, the impurities can be blocked and opened to ensure the efficiency of the gas outlet. At the same time, the up and down movement of the blocking plate can also shake and clean itself after work to ensure subsequent use;

[0014] 2. The utility model can prevent these large particles from affecting the normal fluidization of the fluidized bed through the coordination between the various parts of the air distribution mechanism and the slag discharge mechanism, thereby facilitating the improvement of the stability of the fluidized bed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of a biomass fluidized bed gasifier of the utility model;

[0016] Figure 2 This is a schematic diagram of the front view structure of a blocking mechanism of a biomass fluidized bed gasifier of the utility model;

[0017] Figure 3 The utility model is a biomass fluidized bed gasification furnace Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 This is a schematic diagram of the top view of the air distribution ring of a biomass fluidized bed gasification furnace of the utility model;

[0019] Figure 5 The utility model is a schematic diagram of a partial cross-sectional structure of a slag collecting chamber of a biomass fluidized bed gasification furnace in a front view.

[0020] In the figure: 1. main furnace; 2. feed port; 3. air outlet; 4. blocking mechanism; 401. blocking plate; 402. rotating shaft; 403. air vent; 404. lifting cylinder; 405. movable head; 406. limiting slide; 5. air distribution mechanism; 501. air guide duct; 502. air distribution ring; 503. air outlet duct; 6. slag discharge mechanism; 601. slag collecting chamber; 602. rotating motor; 603. spiral shaft. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figure 1-Figure 3 As shown, a biomass fluidized bed gasification furnace comprises a main furnace 1 and a blocking mechanism 4, characterized in that a blocking mechanism 4 for impurity blocking is arranged above the interior of the main furnace 1, the blocking mechanism 4 comprises a blocking plate 401, a rotating shaft 402, an air vent 403, a lifting cylinder 404, a movable head 405 and a limiting slide 406, a rotating shaft 402 is installed at one end of the blocking plate 401, an air vent 403 is opened on the surface of the blocking plate 401, a lifting cylinder 404 is arranged above the blocking plate 401, a movable head 405 is installed at the bottom end of the lifting cylinder 404, and a limiting slide 406 is arranged below the movable head 405, and the limiting slide 406 is fixedly connected to the blocking plate 401, a feed port 2 is connected to one side of the upper surface of the main furnace 1, and an air outlet 3 is connected to the upper middle part of the main furnace 1;

[0024] The impurity particles mixed in the airflow can be blocked by the blocking plate 401 and the small hole-shaped air holes 403 to prevent the impurities from being carried out by the airflow and affecting the cleanliness of the obtained gas. The blocking plate 401 can be lifted and rotated by the lifting cylinder 404 under the rotation cooperation of the movable head 405 and the rotating shaft 402 and the sliding cooperation of the position limiting slide 406, so as to complete the activity adjustment of the blocking plate 401. In this way, while blocking the impurities, it can also be opened when the airflow is blocked to ensure the efficiency of the gas outlet. At the same time, the up and down movement of the blocking plate 401 can also be shaken and cleaned after work to ensure subsequent use.

[0025] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, an air distribution mechanism 5 for uniform air outlet is provided in the middle of the inner side of the main furnace 1, and a slag discharge mechanism 6 for impurity discharge is provided at the bottom of the main furnace 1. The air distribution mechanism 5 includes an air guide pipe 501 and an air distribution ring 502. The front end of the air guide pipe 501 is connected to the air distribution ring 502. The air distribution mechanism 5 also includes an air outlet pipe 503. The upper surface of the air distribution ring 502 is equipped with the air outlet pipe 503. The slag discharge mechanism 6 includes a slag collecting chamber 601, a rotating motor 602 and a spiral shaft 603. The rotating motor 602 is installed on one side of the outer side of the slag collecting chamber 601, and the output end of the rotating motor 602 is connected to the spiral shaft 603. Through the annularly distributed air duct 501 and air distribution ring 502, uniform air outlet can be ensured while the gaps therein can also ensure the falling of impurities. The impurities that fall to the bottom are automatically transported by rotating the motor 602 and the screw shaft 603, thereby preventing these large particles from affecting the normal fluidization of the fluidized bed, which is beneficial to improving the stability of the fluidized bed operation.

[0026] Working principle: When using the biomass fluidized bed gasifier, first, the impurity particles mixed in the airflow can be blocked by the blocking plate 401 and the small hole-shaped air vents 403, and then the blocking plate 401 can be lifted and rotated by the lifting cylinder 404 under the rotation cooperation of the movable head 405 and the rotating shaft 402, and the sliding cooperation of the position limiting slide 406, so as to complete the activity adjustment of the blocking plate 401, and then the up and down movement of the blocking plate 401 can also be shaken and cleaned after work. At this time, the annularly distributed air guide duct 501 and the air distribution ring 502 can ensure uniform air outlet while the gap therein can also ensure the falling of impurities. Finally, the impurities that fall to the bottom are automatically transported and discharged by rotating the motor 602 and the spiral shaft 603.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biomass fluidized bed gasification furnace, comprising a main furnace (1) and a blocking mechanism (4), characterized in that: A blocking mechanism (4) for blocking impurities is arranged above the interior of the main furnace (1), and the blocking mechanism (4) includes a blocking plate (401), a rotating shaft (402), an air vent (403), a lifting cylinder (404), a movable head (405) and a limiting slide (406). The rotating shaft (402) is installed at one end of the blocking plate (401), and the surface of the blocking plate (401) is provided with an air vent (403). A lifting cylinder (404) is arranged above the blocking plate (401), and a movable head (405) is installed at the bottom end of the lifting cylinder (404), and a limiting slide (406) is arranged below the movable head (405), and the limiting slide (406) is fixedly connected to the blocking plate (401).

2. The biomass fluidized bed gasifier according to claim 1, characterized in that: A material inlet (2) is connected to one side of the upper surface of the main furnace (1), and an air outlet (3) is connected to the upper middle portion of the main furnace (1).

3. The biomass fluidized bed gasifier according to claim 1, characterized in that: An air distribution mechanism (5) for uniform air discharge is provided at the inner middle part of the main furnace (1), and a slag discharge mechanism (6) for discharging impurities is provided at the bottom of the main furnace (1).

4. The biomass fluidized bed gasifier according to claim 3, characterized in that: The air distribution mechanism (5) comprises an air guide pipe (501) and an air distribution ring (502), and the front end of the air guide pipe (501) is connected to the air distribution ring (502).

5. The biomass fluidized bed gasifier according to claim 4, characterized in that: The air distribution mechanism (5) further comprises an air outlet pipe (503), and the air outlet pipe (503) is installed on the upper surface of the air distribution ring (502).

6. The biomass fluidized bed gasifier according to claim 3, characterized in that: The slag discharge mechanism (6) comprises a slag collecting chamber (601), a rotating motor (602) and a screw shaft (603); the rotating motor (602) is installed on one side of the outside of the slag collecting chamber (601), and the output end of the rotating motor (602) is connected to the screw shaft (603).

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