Design and construction method of a whole-bale straw gasification device

Abstract

The present invention relates to a design and construction method of a whole-bale straw gasification device, which is suitable for road transportation and is used as part of a modular system for straw energy utilization. Only a small amount of installation work is required at the installation site of a heating station and a small power plant. The horizontally arranged combustion chamber refractory brick lining vault is designed to be variable, and the thermal output of the modular system can be improved by connecting multiple gasification modules. The whole-bale straw gasification module includes a whole-bale straw gasification chamber 1 and a post-gasification chamber 2, and the whole-bale straw gasification chamber and the post-gasification chamber are separated by a rotatable grate 3. The gap width of the rotatable grate can be adjusted from the outside. The movement of the rotatable grate can destroy the charcoal ash bridge between the grates at any time, and by controlling the air supply of the post-gasification chamber 2, ash containing a high proportion of biochar can be produced. The cooling water jacket 7 of the gasification module is made of the same bent metal plates welded at equal distances to simplify the manufacturing process and achieve sufficient compressive strength.

Description

Technical Field

[0001] The present invention relates to a design and construction method of a whole-bale straw gasification device, which adopts a modular structure and can be transported by road. The whole-bale straw gasification device can be used independently or connected with other whole-bale straw gasification devices to achieve high combustion power output. The gasification process of the whole-bale straw gasification device is carried out in two steps, the integrity of the gasification process is improved, and the dust content in the flue gas is reduced. Background Art

[0002] According to patent WO2005 / 040680A1, when the whole straw bale is gasified, it is located on the exhaust port arranged in the central position, and the combustible smoke generated by gasification is sucked away at an accelerated rate downward around the exhaust port. Although this is conducive to the combustion of carbon residues in the smoke, ash will also be sucked out together with the smoke, so the separation of ash and smoke may be insufficient.

[0003] According to patent CN201811060698.0, the combustible flue gas is sucked upward to achieve better ash separation. However, there is a risk that more carbon residues remain in the lower part of the gasification chamber. The combustion of these carbon residues requires the addition of air through the bottom plate of the gasification chamber. However, since there is no sensor, it is difficult to accurately control the air supply. If the air supply is too large, the quality of the fuel gas will be reduced and the formation of slag will be promoted.

[0004] Known whole straw bale gasification systems generally have only one gasification chamber, i.e. a single-step gasification realizes multiple functional processes, including pyrolysis, gasification, carbon residue combustion and ash removal, etc., which can only be optimally realized under individual and very different parameter conditions.

[0005] Many farmlands require fertilizers to improve soil quality. In addition to the minerals in wood ash, a larger proportion of biochar is sometimes required. Currently, there is no device that uses a whole-bundle gasification combustion system to produce biochar in different proportions.

[0006] The known whole-bale straw gasification systems are subject to limitations such as the maximum allowable size and maximum weight for road transportation, and therefore cannot increase the combustion power output by increasing the number of whole-bale straw gasification systems. In addition, the known whole-bale straw gasification systems contain a large number of flat plates or bent plates, which complicate the manufacturing optimization design of the whole-bale straw gasification systems in terms of manufacturing process. Summary of the invention

[0007] The whole-bale straw gasification device of the present invention includes modular units that have been processed in the factory and can be transported on the road. The whole-bale straw gasification device can form part of a standard modular system for straw energy utilization. It is also possible to achieve a greater combustion power output and variable heat output by connecting the whole-bale straw gasification devices to each other at the side. Ash separation and residual carbon combustion can be more complete than before, and a higher ratio of biochar and ash mixture can be produced as needed.

[0008] The manufacture of the furnace body including the cooling water jacket will also be simplified through structural and process optimization measures.

[0009] According to the present invention, the purpose is mainly achieved by dividing the whole straw bale gasification process into two spaces and two steps. The whole straw bale is pyrolyzed and gasified in the first space, i.e., the whole straw bale gasification chamber, but some straw fibers and charcoal etc. will remain.

[0010] A post-gasification chamber is arranged at the bottom of the whole-bale straw gasification chamber, which can be manufactured and transported separately as an independent unit. In this post-gasification chamber, the smaller pieces and segments of residual straw and residual charcoal will be gasified or burned through secondary air supply. Part of the gasification and combustion here will be completed during the low-flow movement of the flue gas, and the other part will be completed in the ash layer located in the middle and lower part of the post-gasification chamber.

[0011] The present invention arranges several rotatable grates of double-tube structure between the two gasification spaces, each grate comprises an inner tube and an outer tube, and both the inner and outer tubes can rotate around the longitudinal axis of the rotatable grate. The coolant flows through the inner tube, and the outer tube is made of refractory stainless steel and refractory ceramic materials, etc. The cross section of the outer tube is roughly elliptical. This structure can set the gap width between the rotatable grates by rotating the double tubes from the outside.

[0012] By changing the position of the double tubes of these rotatable grates, the ash bridges formed by gasification combustion are continuously broken down. During this operation, the temperature difference between the two nested tubes is relatively large. The stainless steel outer tube is loosely placed on the cooled inner tube and can be stretched longitudinally.

[0013] The slit width of the rotatable grate can vary between 10-30 cm, which allows the entire bale of straw to remain in its original shape for as long as possible during the gasification process. The straw stalks and straw carbon fibers are closely interwoven with each other, allowing the straw to be gasified at a lower intensity all the time, while the rotatable grate gap can maintain a larger space at the same time, making it easier for smaller pieces of straw and residual charcoal to pass through.

[0014] A larger grate gap width will make the flue gas flow at a low speed to optimize ash separation, while a smaller grate gap width can reduce the number of small fuel particles in the post-gasification chamber but increase the flue gas flow speed. Very small, burned and unburned small straw particles and char residues that have been separated from the flue gas pass through the rotatable grate and enter the lower part of the post-gasification chamber together with ash, etc.

[0015] An air supply port is provided above the ash discharge device at the bottom of the rear gasification chamber, through which air can be sucked in to burn or gasify the remaining small straw particles or charcoal residues in the ash layer.

[0016] The residual small straw fuel particles and unburned charcoal that can reach this point only account for a small part of the total fuel for gasification, so it is sufficient to add a small amount of combustion air to the ash layer in the post-gasification chamber, and the combustion air is sucked in through negative pressure. Experience shows that an almost constant small amount of air supply can make the residual small straw fuel particles and charcoal in the post-gasification chamber burn or complete gasification, and generally no other special control and adjustment measures are required.

[0017] If the addition of combustion air is prevented or reduced, it is also possible to form a mixture of more ash and biochar, etc. and remove it from the gasification device to be directly used as a soil conditioner or raw material for compound fertilizer.

[0018] The combustible flue gas from the whole straw bale gasification chamber flows downward approximately diagonally through the rotatable grate into the post-gasification chamber, and then returns upward approximately diagonally from the post-gasification chamber in the opposite direction to be sucked into the flue gas discharge channel. Due to this structural design, the combustible flue gas flows in a nearly U-shaped path, and gravity and centrifugal force can promote the downward movement of ash and small fuel particles and separate them from the combustible flue gas.

[0019] Depending on the required gasification performance of the whole straw bale, the post-gasification chamber can be dimensioned so that the residence time of the combustible flue gases exceeds one second. All inner walls of the whole straw bale gasification chamber and the post-gasification chamber can be designed to be at an angle of at least about 55° to the horizontal plane, so that small straw fuel particles and ash, etc. can slide freely and automatically down along the inner walls.

[0020] This whole-bale straw gasification module can be used alone or in combination. The lining of the horizontally arranged combustion chamber made of ceramic and other refractory materials is designed as a variable structure. These linings are composed of several mutually nested vaults made of arched refractory bricks. When the innermost layer of the combustion chamber vault is removed, the internal cross-section of the combustion chamber will increase and obtain a larger flue gas flow, so that more whole-bale straw gasification modules can be combined adjacent to each other.

[0021] The horizontally arranged combustion chamber is designed as a grooved steel tubular structure. The grooved steel combustion chamber tube is bridged with supporting stones. The refractory bricks of the combustion chamber vault are framed on the supporting stones. The combustible flue gas from the whole straw bale gasification chamber flows into the horizontally arranged combustion chamber through the free space between the supporting stones.

[0022] The production of the whole straw bale gasification module is simplified and the manufacturing cost is reduced due to the following facts: the front wall and the rear wall of the whole straw bale gasification module are made of metal plates only. During the manufacturing process, the plates with the same size and arched shape are positioned and welded in the horizontal direction, which can save the time of connecting the inner and outer plates of the wall. The plates with a certain curvature can obtain sufficient compressive strength to ensure that the coolant can flow freely between the inner and outer plates, and at the same time, they can resist the wall pressure changes caused by the internal explosion of the gasification chamber, thereby improving the safety of the whole whole straw bale gasification module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A whole-bale straw gasification module is shown in cross section with a post-gasification chamber (2).

[0024] Figure 2 A cross section of the arrangement of the rotatable grate (3) is shown.

[0025] Figure 3 The structural arrangement of the double tubes etc. of the rotatable grate (3) is shown.

[0026] Figure 4 A double tube longitudinal section unit with a bearing sleeve is shown for a rotatable grate (3).

[0027] Figure 5 A cross section of a combustion chamber (10) in a horizontal arrangement is shown.

[0028] Figure 6 A plan view of two interconnected whole-bale straw gasification modules is shown.

[0029] Figure 7 A cross-section of a combustion chamber (10) in a horizontal arrangement is shown.

[0030] Figure 8 A whole straw bale gasification module with a straw bale feeding device is shown.

[0031] In the figure: 1-whole straw bale gasification chamber, 2-rear gasification chamber, 3-rotatable grate, 4-straw bale filling port, 5-bale filling amount indicator button, 6-air inlet, 7-cooling water jacket, 8-ceramic insulation lining, 9-ash discharge device, 10-combustion chamber, 11-combustible flue gas, 12-air inlet, 13-smoke discharge channel, 14-charcoal ash layer, 15-ashes, 16-concrete foundation, 17-handle, 18-grate inner tube, 19-grate outer tube, 20-high temperature resistant steel support rod, 21-high temperature resistant steel long hook, 22-high temperature resistant steel short hook, 23-hard ceramic layer, 24-insulation layer, 25-inner steel plate, 26-outer steel plate, 27-cold Coolant, 28-driving pipe, 29-engaging locking device, 30-soft seal, 31-rolling bearing, 32-hose, 33-first combustion chamber arch, 34-second combustion chamber arch, 35-support stone, 36-grooved steel combustion chamber pipe, 37-inner curved plate, 38-outer curved plate, 39-whole bale straw gasification device 1, 40-whole bale straw gasification device 2, 41-tensioning belt, 42-enclosed door, 43-smoke outlet, 44-free space, 45-whole bale straw bale, 46-chain sliding shield, 47-cooling water jacket, 48-bale gate, 49-secondary air inlet, 50-mineral fiber cushion, 51-flange. DETAILED DESCRIPTION

[0032] Application examples of the present invention will be explained in more detail below with reference to the accompanying drawings.

[0033] according to Figure 1 The whole-bale straw gasification device has a rated thermal output of 4.7MW and a maximum thermal output of 5.3MW. The whole-bale straw gasification chamber (1) can accommodate two round straw bales with a length of about 1.2 meters and a diameter of about 1.4 meters at a time, and can accommodate up to 16 straw bales with a length of about 1.2 meters and a diameter of about 1.4 meters at a time. Figure 1 not shown).

[0034] Gasifying a large volume of straw exceeding 3000 kg at a time can make the intensity of straw gasification very small, and only a relatively low gasification temperature is required to produce a sufficient amount of combustible flue gas (11). This can minimize the formation of coke during the gasification process and keep the ash basically in powder form and with a high fertilizer value.

[0035] In the above gasification process, the oxygen in the inhaled air supply is largely digested during the oxidation process, which can minimize the air supply volume. At the same time, the content of non-flammable carbon dioxide and nitrogen is also low, and the calorific value of the combustible flue gas produced by gasification reaches the highest.

[0036] The rear gasification chamber (2) is connected to the whole-bale straw gasification chamber (1) at the bottom. The rear gasification chamber (2) is an independent module that can be manufactured and transported separately and then connected to the part containing the whole-bale straw gasification chamber (1) to form the whole-bale straw gasification module of the present invention.

[0037] The rotatable grate (3) is arranged between the whole straw bale gasification chamber (1) and the post-gasification chamber (2), and the whole straw bale (45) enters the whole straw bale gasification chamber (1) through the straw bale filling port (4). When the whole straw bale (45) fills the whole straw bale gasification chamber (1), the post-bale filling amount indicator button (5) will send a signal and stop filling the whole straw bale (45). The combustion air is sucked into the whole straw bale gasification chamber (1) through the air supply port (6).

[0038] The entire outer side of the whole-bundle straw gasification module of the present invention is wrapped by a circumferential cooling water jacket (7), and a ceramic heat-insulating lining (8) is arranged on the inner side of the cooling water jacket (7). Fine straw particles, charcoal residues, ash, etc. fall into the rear gasification chamber (2) through the rotatable grate (3) and form a charcoal ash layer (14). In order to allow the fine straw particles and charcoal residues falling into the rear gasification chamber (2) to be completely burned and gasified, a small amount of combustion air can be sucked in through the air inlet (12).

[0039] The air supply here is kept constant and hardly needs to be adjusted and controlled. In order not to reduce the calorific value of the combustible flue gas produced by gasification and to control the temperature of the post-gasification chamber (2) to avoid the generation of slag, as little air as possible should be provided. There is an ash discharge device (9) at the bottom of the post-gasification chamber (2).

[0040] If it is desired to produce more ash-biochar mixture, the air inlet (12) can be closed, which will increase the proportion of biochar in the ash and remove it from the post-gasification chamber (2) through the ash discharge device (9).

[0041] The combustible flue gas (11) first passes through the rotatable grate (3) on a U-shaped path, then flows through the post-gasification chamber (2) and enters the flue gas discharge channel (13). In this process, small straw particles, dust, sand and the like are separated from the combustible flue gas (11) by gravity and centrifugal force. In the free space of the post-gasification chamber (2), the small straw particles and unburned charcoal are burned or gasified in a nearly fluid state or in an ash layer.

[0042] The angle between all the walls in the whole straw bale gasification chamber (1) and the post-gasification chamber (2) and the horizontal plane is about 55°, so that a large amount of ash deposits will not be formed on the walls.

[0043] exist Figure 2The implementation of the rotatable grate (3) is shown in more detail. The rotatable grate (3) in this embodiment is composed of three double tubes, each of which can rotate around the longitudinal axis. The outside of the double tube is designed to be a hard ceramic layer (23) with a nearly elliptical cross-section.

[0044] In this embodiment, the three rotatable grates (3) are rotated and locked in the desired position from the outside only by the handle (17), and this process can also be achieved by driving a motor or the like. The nearly elliptical shape allows the gap width between the movable grates (3) to change. If the gap is larger, the flow rate of the combustible flue gas (11) will decrease, and more small straw particles and ash will enter the rear gasification chamber (2) through the movable grate (3). If the gap is smaller, the flow rate of the combustible flue gas (11) will increase, and the small straw particles and ash will enter the rear gasification chamber (2) through the movable grate (3), but at the same time, the flue gas temperature will increase.

[0045] By rotating the double tubes of the rotatable grate (3), the gap width between the rotatable grate (3) can be changed. In this embodiment, the gap width of the rotatable grate (3) can be changed between 10 and 30 cm. An opening or observation hole can be arranged in the rear gasification chamber (2) to facilitate the operator to observe the size of the charcoal ash layer (14) at any time.

[0046] The charcoal ash bridge formed between the rotatable grates (3) can be broken at any time by rotating the rotatable grates (3).

[0047] Figure 3 The double-tube structure of the rotatable grate (3) is shown. The grate inner tube (18) can be made of ordinary carbon steel. In this embodiment, the outer diameter of the grate inner tube (18) is 89 mm, the wall thickness is 10 mm, and the tube length is about 3.2 m. The coolant (27) flows inside the grate inner tube (18). The coolant in this embodiment is a mixture of ethylene glycol and water. The grate outer tube (19) can be made of high-temperature resistant steel such as stainless steel. The outer tube is provided with a high-temperature resistant steel support rod (20) and a high-temperature resistant steel long hook (21) and a high-temperature resistant steel short hook (22) for fixing ceramic materials. The nearly elliptical hard ceramic layer (23) can be composed of high-quality sintered ceramics.

[0048] Figure 4 The arrangement of the grate inner tube (18) and the grate outer tube (19) made of stainless steel is shown. Compared with the grate inner tube (18) through which the coolant flows, the temperature of the grate outer tube (19) is much higher during operation, and the expansion force is also greater, but because the grate outer tube (19) is appropriately placed on the cooled grate inner tube (18), the heat transfer to the grate inner tube (18) is also reduced.

[0049] The driving tube (28) is firmly connected to the grate inner tube (18) through the meshing locking device (29), and the grate outer tube (19) can expand freely in the longitudinal direction. However, when the grate inner tube (18) rotates, the grate outer tube (19) is driven by the meshing locking device (29) between the driving tube (28) and the grate outer tube (19).

[0050] The grate inner tube (18) can also expand slightly within the range of the soft seal (30), which can also prevent air from entering the whole straw bundle gasification chamber (1). The coolant (27) is supplied through a hose (32), and the hose (32) will not affect the rotation of the rotatable grate (3).

[0051] The wall material of the whole straw bale gasification chamber (1) is steel plate. In this embodiment, an inner steel plate (25) with a thickness of 7 mm and an outer steel plate (26) with a thickness of 5 mm are used. Figure 4 The steel columns not shown are connected to each other to obtain sufficient compressive strength. The coolant (27) flows between the inner steel plate (25) and the outer steel plate (26). The pressure of the coolant in this embodiment is limited to 0.1 MPa.

[0052] The first thing arranged on the inner side of the cooling water jacket (7) of the whole straw bale gasification module wall is the heat insulation layer (24). The heat insulation layer (24) in this embodiment is vermiculite concrete with a thickness of about 9 cm. Next is the hard ceramic layer (23). The hard ceramic layer (23) in this embodiment is wear-resistant and fire-resistant concrete with a thickness of about 8 cm. The heat insulation layer (24) and the hard ceramic layer (23) together constitute the ceramic heat insulation lining (8).

[0053] The ceramic heat-insulating lining (8) is composed of a large number of high-temperature resistant steel hooks ( Figure 4 The high temperature resistant steel structure in this embodiment uses round stainless steel wire with a diameter of 4 mm, and these stainless steel hooks are fixed and welded at a distance of about 8-10 cm from each other using a stud welding process.

[0054] Figure 5 The structure of a combustion chamber (10) arranged horizontally is shown. The combustion chamber (10) is a tubular structure with a slotted opening, and the outermost part of the tubular structure is a slotted steel combustion chamber tube (36). The diameter of the slotted steel combustion chamber tube (36) in this embodiment is 1400 mm. An insulation layer (24) composed of vermiculite concrete is first arranged inside the slotted steel combustion chamber tube (36), and a first combustion chamber dome (33) and a second combustion chamber dome (34) composed of refractory bricks are arranged inside the insulation layer (24).

[0055] The cross section of the combustion chamber (10) can be enlarged by reducing the first combustion chamber dome (33), and two whole straw bale gasification modules can be connected to each other at the side to double the whole straw bale gasification capacity. The refractory bricks of the combustion chamber dome are laterally supported on support stones (35), between which the combustible flue gas (11) flows through the flue gas discharge channel (13), and the support stones (35) can be composed of cast or sintered refractory concrete.

[0056] The wall extending in the horizontal direction is an inner curved plate (37) and an outer curved plate (38) made of the same metal plate. The inner curved plate (37) and the outer curved plate (38) are welded to each other in an interlaced manner to compensate for the difference in the length of the curved plates. The curvature can increase the compressive strength of the curved plates. This design can reduce the types of steel plates used and save the complicated connection of the inner curved plate (37) and the outer curved plate (38).

[0057] Figure 6 Two whole-bale straw gasification devices (39, 40) are shown, each of which has a rated thermal output of 4.7MW and a maximum of 5.3MW. The two whole-bale straw gasification devices (39, 40) are arranged adjacent to each other, and the combustion chambers (10) are connected to each other, and the total thermal output can reach 10.6MW.

[0058] The connection in this embodiment is achieved by a tensioning band (41) made of metal plate and a mineral fiber cushion (50) on a grooved steel combustion chamber tube (36). This flexible connection method allows the tensioning band (41) and the like to produce a small displacement due to thermal expansion.

[0059] Figure 6 The combustion chamber (10) of the whole-bale straw gasification device 1 (39) located on the left side includes a first combustion chamber dome (33); the first combustion chamber dome (33) is removed from the combustion chamber (10) of the whole-bale straw gasification device 2 (40) located on the right side. The combustion chamber (10) without the first combustion chamber dome (33) can accommodate approximately twice the flue gas flow rate.

[0060] The whole-bale straw gasification device 1 (39) can work alone or together with the whole-bale straw gasification device 2 (40) to improve the heat output. If the heat demand is small and only one module is needed, a sealing plate made of metal or the like can be inserted between the two modules. By stopping a single module, the heat output can be changed without reducing the tail flue gas emission performance or causing waste of fuel consumption. The flue gas outlet (43) of the combustion chamber (10) can also be connected to the convergent post-combustion system to achieve more whole-bale straw gasification modules working simultaneously and further expand the heat output.

[0061] Figure 7The structure of the horizontally arranged combustion chamber (10) is further shown, which is built into a grooved steel combustion chamber tube (36), the openings in the grooved steel combustion chamber tube (36) are bridged by supporting stones (35), and there are free spaces (44) between them, through which the combustible flue gas (11) can flow into the horizontally arranged combustion chamber (10), and the width of these free spaces (44) can be adjusted by increasing or decreasing the number of refractory bricks so that the best combustion effect can always be achieved.

[0062] The refractory bricks of the combustion chamber vault can be sintered and arranged on the supporting stone (35) before installation. The thermal stress of these block materials is limited and thus the service life is long. All refractory bricks and ceramic blocks can absorb heat at higher temperatures and also release heat at lower temperatures, which makes the combustion process more uniform and stable.

[0063] The secondary air can be introduced into the horizontally arranged combustion chamber (10) through the secondary air introduction port (49) by using known technology.

[0064] Figure 8 The whole straw bale gasification module is shown, which includes an automatic bale feeding device, which is necessary for the operation of the whole straw bale gasifier module. It includes a straw bale gate (48) and a chain-driven chain-type sliding shield (46) to complete the delivery of whole straw bales (45). The part of the automatic bale feeding device inserted into the whole straw bale gasification chamber (1) includes a cooling water jacket (47) composed of bent metal plates.

[0065] Economical mass production can be achieved through standard modular design and manufacturing, which means that the most advanced manufacturing technologies can be used to improve product quality, reduce prices and increase competitiveness.

[0066] The whole-bale straw gasification module is designed to be used to build a whole-bale straw gasification combustion system that meets various conditions, especially for the construction of biomass power plants using straw as fuel. Since most of the assembly parts can be transported to the project construction site after being manufactured in the factory, the installation personnel expenses at the project construction site can be reduced several times, and the assembly time can also be greatly shortened, which will significantly reduce costs.

Claims

1. A whole-bale straw gasification device, comprising a whole-bale straw gasification chamber which is water-cooled and has a ceramic heat-insulating lining inside, the bottom plate of the whole-bale straw gasification chamber is at an angle, the whole-bale straw gasification device comprises an automatic whole-bale straw feeding device for conveying whole-bale straw bales from above, a straw bale filling amount indicator button for indicating the amount of straw input into the whole-bale straw gasification chamber, and a combustion air supply port located at the top of the whole-bale straw gasification chamber; characterized in that: A post-gasification chamber (2) is arranged downwardly behind the whole-bale straw gasification chamber (1), and a rotatable grate (3) is arranged between the whole-bale straw gasification chamber (1) and the post-gasification chamber (2). The post-gasification chamber is manufactured and transported separately as an independent unit.

2. The whole-bale straw gasification device according to claim 1, characterized in that: The rotatable grate (3) comprises two tubes, a grate inner tube (18) and a grate outer tube (19), which are arranged horizontally and can rotate around the longitudinal axis of the rotatable grate (3).

3. The whole-bale straw gasification device according to claim 2, characterized in that: The grate inner tube (18) and the grate outer tube (19) of the rotatable grate (3) are double-tubed and nested with each other, a coolant (27) flows in the grate inner tube (18), and a hard ceramic layer (23) is arranged on the outer side of the grate outer tube (19).

4. The whole-bale straw gasification device according to claim 3, characterized in that: The cross section of the hard ceramic layer (23) on the outer side of the grate outer tube (19) is nearly elliptical, and the hard ceramic layer (23) is strengthened in stability by a high-temperature resistant steel support rod (20) made of stainless steel.

5. The whole-bale straw gasification device according to claim 1, characterized in that: A cooling water jacket (7) is arranged around the rear gasification chamber (2), a ceramic heat insulation lining (8) and a plurality of air supply ports (12) are arranged on the inner side of the cooling water jacket (7), and an ash discharge device (9) is arranged at the lowest point of the rear gasification chamber (2).

6. The whole-bale straw gasification device according to claim 1, characterized in that: The sizes and mutual arrangement of the rotatable grate (3), the post-gasification chamber (2) and the flue gas exhaust channel (13) are such that the path of the combustible flue gas (11) flowing through the post-gasification chamber (2) is roughly U-shaped, and the residence time of the combustible flue gas (11) in the post-gasification chamber (2) is longer than one second.

7. The whole-bale straw gasification device according to claim 1, characterized in that: The horizontally arranged combustion chamber (10) is arranged in a grooved steel combustion chamber tube (36) and comprises at least two nested first combustion chamber domes (33) and second combustion chamber domes (34) made of refractory bricks supported by support stones (35), which bridge the opening of the grooved steel combustion chamber tube (36).

8. The whole-bale straw gasification device according to claim 1, characterized in that: The arranged cooling water jacket (7) is composed of an inner curved plate (37) and an outer curved plate (38) made of metal, and the inner curved plate (37) and the outer curved plate (38) are staggered and welded to each other with equal distance dimensions.

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