A pressure-bearing biomass gasifier

Abstract

The present application relates to the technical field of biomass gasification furnace, and disclose a kind of pressure-bearing biomass gasification furnace, the lower circular header is the bottom end of furnace body, the upper circular header is the top end of furnace body, the lower circular header and the upper circular header are fixedly connected by heat preservation layer, the inside of the lower circular header and the upper circular header is provided with annular pipe.The present application is provided with furnace body, which is composed of lower circular header, upper circular header, heat preservation layer and other components, and soft water is continuously supplied into the annular pipe by setting pot shell and its components, so that the water absorbs the heat generated inside the gasification furnace during movement, i.e. effectively consumes the heat inside the gasification furnace, so that the temperature borne by the heat preservation layer is lower after the blocking and transmission of the annular pipe and the connecting piece, i.e. under the condition of meeting high-temperature gasification, the outer wall of the furnace body can meet the manufacturing requirements by using more common and inexpensive materials, effectively reducing the manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass gasification furnace, in particular to a pressure-bearing biomass gasification furnace. BACKGROUND

[0002] Gasification technology is a kind of technology of thermo-chemical conversion of biomass, that is, under the condition of incomplete combustion, the higher molecular weight organic carbon hydrogen compound chain in the biomass fuel is cracked into lower molecular weight CO, H2, CH4 and other combustible gases. At present, the biomass fuel gas takes agricultural and forestry waste as raw material, and under the condition of oxygen deficiency and thermodynamics, the combustible gas is generated by the oxidation, reduction and pyrolysis of carbon in the biomass. The gasification process includes four processes of oxidation reaction, reduction reaction, pyrolysis and drying of the biomass raw material, and the generated combustible gas is the biomass fuel gas, and the equipment for producing the biomass fuel gas is called biomass gasification furnace.

[0003] However, the existing biomass gasification furnace still has some defects in the use process: the gasification furnace continuously maintains high temperature in the furnace through oxidation, reduction and other reactions, so that the fuel gas production is high, the tar content is low, and the energy conversion is complete. However, there are few types and quantities of high-temperature-resistant gasification furnaces on the market at present. The reason is that there are few metal materials that can adapt to the highest temperature of more than 1200 degrees, and the price is expensive, which leads to high manufacturing cost of the gasification furnace, and the metal material is easy to deteriorate at high temperature, which causes short service life. In addition, a large amount of heat of the gasification furnace is transferred to the outside by the furnace wall during use, so that it cannot be fully utilized, causing waste of heat resources. SUMMARY

[0004] In view of the problems of the existing biomass gasification furnace in the background art, the present application provides a pressure-bearing biomass gasification furnace, which has the advantages of high-temperature resistance, effectively improving the service life of the furnace body, and preventing resource waste, solving the technical problems in the above background art.

[0005] The application provides the following technical scheme: a pressure-bearing biomass gasification furnace, comprising a furnace body, a wall surface below one side of the furnace body is fixedly sleeved with an air inlet pipe, the furnace body is composed of a lower circular header, an upper circular header and a heat preservation layer, the lower circular header is a bottom end of the furnace body, the upper circular header is a top end of the furnace body, the lower circular header and the upper circular header are fixedly connected through the heat preservation layer, a ring pipe is arranged in the lower circular header and the upper circular header, a side surface of the ring pipe in the lower circular header is communicated with one end of a downcomer, the other end of the downcomer is communicated with a drum, a top end of the ring pipe in the upper circular header is communicated with one end of an upcomer, the other end of the upcomer is communicated with the drum, an inner wall of the heat preservation layer is fixedly connected with one side of a column pipe, two column pipes are connected through a connecting piece, and the connecting piece is fixedly connected with the heat preservation layer, a top end of the ring pipe in the lower circular header is communicated with one end of the column pipe, and a bottom end of the ring pipe in the upper circular header is communicated with the other end of the column pipe.

[0006] Preferably, one side of the connecting piece is fixedly connected with one end of a fixed strip, the other end of the fixed strip is fixedly connected with a blocking ring, a first hole is formed in one side of the blocking ring close to the center of the furnace body, a side piece is movably sleeved in the first hole, the side piece and the first hole are connected through a contraction spring, a circular groove is formed in the upper end and the lower end of the blocking ring, and a movable piece is movably sleeved in the circular groove, one side of the movable piece is fixedly connected with a limiting piece, a second hole is formed in the blocking ring above and below the first hole, one end of the second hole is communicated with one side of the circular groove, the other end of the second hole is communicated with one side of the first hole, a third hole is formed in the blocking ring on the other side of the circular groove, and the third hole is communicated with the circular groove.

[0007] Preferably, the number of the downcomers is four, and the downcomers are evenly arranged around the center of the upper circular header.

[0008] Preferably, the material of the internal components of the drum is Q345R, and the materials of the upcomer, the downcomer, the ring pipe and the column pipe are 20G.

[0009] Preferably, the number of the column pipes is several, and the column pipes are evenly arranged around the center of the furnace body.

[0010] Preferably, the cross-sectional shape of the blocking ring is triangular.

[0011] Preferably, the first hole and the third hole are in one-to-one correspondence, and the third hole is in one-to-one correspondence with the column pipe.

[0012] Preferably, the cross-sectional shape of the limiting piece is sector-shaped, and the side wall of the limiting piece close to the second hole is in contact with the wall surface of the circular groove in the static state, and the two limiting pieces corresponding to the same side piece have opposite magnetism.

[0013] The present application has the following advantages:

[0014] 1、The present application sets the furnace body, which is composed of a lower circular header, an upper circular header, a heat preservation layer and other components, and continuously feeds softened water into the tube column through the kettle drum and its components, so that the water absorbs the heat generated inside the gasification furnace during movement, i.e. the tube column and the connecting piece realize pressure bearing, effectively consume the heat inside the gasification furnace, so that the temperature borne by the heat preservation layer after the blocking and transmission of the tube column and the connecting piece is relatively low, i.e. under the condition of meeting high-temperature gasification, the outer wall of the furnace body of the biomass gasification furnace can meet the manufacturing requirements by using more common and inexpensive materials, effectively reducing the manufacturing cost.

[0015] 2、The present application uniformly sets a plurality of tube columns and connecting pieces on the inner wall of the heat preservation layer, and sets the tube column as a pressure-bearing component, so that the water in the tube column is heated and vaporized to generate steam, and the steam is input into the kettle drum through the riser for full use, and after steam-water separation, the softened water is re-input into the tube column through the downcomer, realizing reasonable circulation of the water-steam system, fully using the heat resources, and effectively preventing the waste of energy.

[0016] 3、The present application sets a blocking ring on the outside of the tube column and the connecting piece, sets a side piece in the middle of one side of the blocking ring, sets a movable piece at the upper and lower ends of the blocking ring, and through the blocking of the blocking ring and the rotation of the movable piece, the material is effectively limited in the falling process, preventing excessive friction between the material and the tube column wall surface and damage, and the rotation of the movable piece promotes the air flow in the third hole and moves along the wall surface of the tube column, further protecting the wall surface of the tube column and improving its service life, and in addition, the rotation of the movable piece also promotes the reciprocating movement of the side piece, thereby pushing the material and improving the production efficiency of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the specific structure inside the furnace body in the present application;

[0019] Figure 3 It is a schematic diagram of the specific structure of the tube column at the position of the air inlet pipe in the present application; Figure 2

[0020] Figure 4 It is a schematic diagram of the specific structure of the tube column at the position of the air inlet pipe in the present application;

[0021] Figure 5 It is a schematic diagram of the internal structure of the furnace body at the height of the blocking ring;

[0022] Figure 6 It is a schematic diagram of the internal structure of the furnace body at the height of the lower circular header;

[0023] ​Figure 7 Fig. 2 is a schematic view of the top structure of a furnace body with the height of the upper circular header in the application.

[0024] In the figure: 1, furnace body; 11, lower circular header; 12, upper circular header; 13, ring pipe; 2, feed pipe; 21, air inlet pipe; 22, air outlet pipe; 23, grate; 24, ash pan; 3, drum; 31, riser; 32, downcomer; 4, insulation layer; 5, tube; 51, connecting piece; 6, baffle ring; 61, first hole; 62, second hole; 63, third hole; 7, side piece; 8, movable piece; 81, limiting piece; 9, fixed bar. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.

[0026] Please refer to Figures 1-2 , Figures 4-7The utility model provides a kind of pressure-bearing biomass gasification furnace, including furnace body 1, the top middle part of furnace body 1 is fixedly sleeved with feed pipe 2, and the top of feed pipe 2 is connected with auger device, material can be input into feed pipe 2 by auger device, then material is sent into furnace body 1 by feed pipe 2, realizes the cracking decomposition of material, the lower wall surface of one side of furnace body 1 is fixedly sleeved with air inlet pipe 21, air is sent into furnace body 1 by air inlet pipe 21, the top of furnace body 1 is fixedly sleeved with gas outlet pipe 22 on both sides, generated fuel gas can be discharged from furnace body 1 by gas outlet pipe 22, the bottom of furnace body 1 is movably sleeved with fire grate 23, and the lower end of fire grate 23 is arranged in the inside of ash tray 24, ash above fire grate 23 can be discharged to ash tray 24, and then discharged from gasification furnace by ash tray 24, furnace body 1 is composed of lower circular header 11, upper circular header 12 and insulation layer 4, lower circular header 11 is the bottom of furnace body 1, upper circular header 12 is the top of furnace body 1, lower circular header 11 and upper circular header 12 are fixedly connected by insulation layer 4, ring pipe 13 is arranged in the inside of lower circular header 11 and upper circular header 12, the side of ring pipe 13 in the inside of lower circular header 11 is communicated with one end of downcomer 32, the other end of downcomer 32 is communicated with kettle drum 3, the number of downcomer 32 is four, and is evenly arranged around the center of upper circular header 12, water vapor in ring pipe 13 can be input into kettle drum 3 by downcomer 32, so that heat is fully utilized, the top of ring pipe 13 in the inside of upper circular header 12 is communicated with one end of upcomer 31, the other end of upcomer 31 is communicated with kettle drum 3, the inner wall of insulation layer 4 is fixedly connected with one side of row pipe 5, the number of row pipe 5 is several, and row pipe 5 is evenly arranged around the center of furnace body 1, the row pipe 5 at the position of air inlet pipe 21 is embedded in the inside of insulation layer 4 by bending setting method, and then is bent into original vertical state after passing through the position of air inlet pipe 21, so that the wall surface of insulation layer 4 can evenly distribute row pipe 5, and row pipe 5 will not be blocked by air inlet pipe 21 to cause insufficient heat absorption of part of furnace body 1 wall surface, two row pipes 5 are connected by connecting piece 51, and connecting piece 51 is fixedly connected with insulation layer 4, the top of ring pipe 13 in the inside of lower circular header 11 is communicated with one end of row pipe 5, the bottom of ring pipe 13 in the inside of upper circular header 12 is communicated with the other end of row pipe 5, the material of the inside components of kettle drum 3 is Q345R, the material of upcomer 31, downcomer 32, ring pipe 13 and row pipe 5 is 20G, can effectively absorb heat, avoid heat waste.

[0027] Please refer to Figures 2-4Further, one side of the connecting piece 51 is fixedly connected with one end of the fixed strip 9, the other end of the fixed strip 9 is fixedly connected with the blocking ring 6 with a triangular cross section, which can prevent the material from being stacked on the top end of the blocking ring 6 and falling down, and can block the material when falling, so that the speed is reduced, the friction effect between the material and the column tube 5 is weakened, the column tube 5 and the connecting piece 51 are effectively protected, the first hole 61 is formed in one side of the blocking ring 6 close to the center of the furnace body 1, the side piece 7 is movably sleeved in the first hole 61, the side piece 7 is connected with the first hole 61 through the contraction spring, the upper end and the lower end of the blocking ring 6 are provided with circular grooves, and the movable piece 8 is movably sleeved in the circular grooves, one side of the outer wall of the movable piece 8 is fixedly connected with the limiting piece 81, the limiting piece 81 has a fan-shaped cross section, and in the static state, the side wall of the limiting piece 81 close to the second hole 62 is in contact with the wall surface of the circular groove, so that the limiting piece 81 can only move the material around the column tube 5 to the center of the furnace body 1, and cannot move the material from the center to the side of the column tube 5, effectively limiting the movement of the material and reducing the excessive friction between the column tube 5 and the material, the two limiting pieces 81 corresponding to the same side piece 7 have opposite magnetism, so that the two limiting pieces 81 have magnetic attraction force, so that the movable piece 8 can quickly return to the original static state after rotating under the action of the material, providing an action for limiting the material next time, the blocking ring 6 above and below the first hole 61 is provided with the second hole 62, one end of the second hole 62 is communicated with one side of the circular groove, the other end of the second hole 62 is communicated with one side of the first hole 61, the blocking ring 6 on the other side of the circular groove is provided with the third hole 63, and the third hole 63 is communicated with the circular groove, the first hole 61 and the third hole 63 correspond to each other, and the third hole 63 corresponds to the column tube 5, so that the third hole 63 can directly face the wall surface of the column tube 5 when exhausting, so that the column tube 5 and the material can be effectively blocked by the airflow, thereby reducing the friction between them and prolonging the service life of the column tube 5.

[0028] Figure 3 The state shown is that the movable piece 8 is not pushed by the material, that is, the state when the movable piece 8 is static, specifically, the magnetic attraction force and the gravity between the two limiting pieces 81 promote the movable piece 8 to keep this state, that is, the side of the limiting piece 81 close to the second hole 62 is in contact with the inner wall of the circular groove, the communication path between the second hole 62 and the circular groove is closed by the limiting piece 81, and the side piece 7 is stretched out of the blocking ring 6 under the action of the contraction spring and the gas pressure in the first hole 61.

[0029] The working principle of the use method of the present application is as follows:

[0030] The gasification furnace is started, the material is input into the furnace body 1 through the auger device and the feeding pipe 2, and the air is input into the furnace body 1 along the air inlet pipe 21, the material falls to the top end of the grate 23, and oxidation, reduction and other reactions promote the material to be converted into fuel gas, which is then discharged through the gas outlet pipe 22, and the remaining ash is discharged from the furnace body 1 through the ash tray 24. In the process, the kettle drum 3 is started, the softened water in the kettle drum 3 is input into the annular pipe 13 inside the furnace body 1 through the descending pipe 32, and then is input into the column pipe 5 through the annular pipe 13. When moving upwards along the column pipe 5, the water absorbs the heat generated in the gasification furnace to form a steam-water mixture. Due to the light density of the steam-water mixture, the steam-water mixture further enters the annular pipe 13 inside the upper circular header 12, and then returns to the kettle drum 3 through the ascending pipe 31. At this time, in the kettle drum 3, the heat carried by the steam is fully utilized after steam-water separation, and the water formed by cooling enters the descending pipe 32 again, thereby forming a water circulation of the whole gasification furnace, effectively absorbing and utilizing the heat in the gasification furnace, reducing the amount of heat diffused to the heat preservation layer 4, so that only simple heat preservation is required for the outer layer of the furnace body 1 in the gasification furnace, effectively saving the manufacturing cost, and the heat inside the gasification furnace is effectively utilized, reducing the waste of heat.

[0031] At the same time, the blocking ring 6 blocks the material during the falling process, effectively slowing down the falling speed of the material, avoiding the serious abrasion caused by the friction contact between the material and the column pipe 5 when the speed of the material is too high. At the same time, the setting of the limiting piece 81 makes the material moving from the center to the column pipe 5 side be blocked by the limiting piece 81 and unable to move to the column pipe 5 side, and the material moving from the column pipe 5 side to the center is quickly moved to the center under the pushing action of the limiting piece 81, effectively limiting the angle of the material inclination and reducing the friction between the column pipe 5 and the material. At the same time, when the movable piece 8 rotates, the space in the circular groove changes constantly under the action of the limiting piece 81, so that when the limiting piece 81 rotates under the action of the material, the airflow is discharged outward through the third hole 63 and moves on the surface of the column pipe 5, further isolating the column pipe 5 and the material, further reducing the degree of friction. In addition, the side piece 7 reciprocates in and out under the change of air pressure in the first hole 61, effectively pushing the material to move, expanding the gap area between the materials, and improving the gasification efficiency and effect of the gasification furnace.

[0032] It should be noted that, in the present document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0033] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A pressurized biomass gasification furnace, comprising a furnace body (1), wherein the top center of the furnace body (1) is fixedly connected to a feed pipe (2), and the lower side wall of one side of the furnace body (1) is fixedly connected to an air inlet pipe (21), characterized in that: The furnace body (1) is composed of a lower circular header (11), an upper circular header (12), and a heat insulation layer (4). The lower circular header (11) is the bottom of the furnace body (1), and the upper circular header (12) is the top of the furnace body (1). The lower circular header (11) and the upper circular header (12) are fixedly connected by the heat insulation layer (4). Both the lower circular header (11) and the upper circular header (12) are equipped with annular pipes (13). The side of the annular pipe (13) located inside the lower circular header (11) is connected to one end of the downcomer pipe (32), and the other end of the downcomer pipe (32) is connected to the boiler drum (3). The top end of the ring pipe (13) located inside the upper circular header (12) is connected to one end of the riser pipe (31), and the other end of the riser pipe (31) is connected to the boiler drum (3). The inner wall of the insulation layer (4) is fixedly connected to one side of the tube (5). The two tubes (5) are connected by a connector (51), and the connector (51) is fixedly connected to the insulation layer (4). The top end of the ring pipe (13) located inside the lower circular header (11) is connected to one end of the tube (5), and the bottom end of the ring pipe (13) located inside the upper circular header (12) is connected to the other end of the tube (5). One side of the connector (51) is fixedly connected to one end of the fixing strip (9), and the other end of the fixing strip (9) is fixedly connected to the retaining ring (6). A first hole (61) is opened on one side of the retaining ring (6) near the center of the furnace body (1). A side piece (7) is movably sleeved inside the first hole (61). The side piece (7) is connected to the first hole (61) by a contraction spring. A circular groove is opened at the upper and lower ends of the retaining ring (6), and a movable piece (8) is movably sleeved inside the circular groove. One side of the outer wall of the movable piece (8) is fixedly connected to the limiting piece (81). A second hole (62) is opened on the retaining ring (6) above and below the first hole (61), and one end of the second hole (62) is connected to one side of the circular groove. The other end of the second hole (62) is connected to one side of the first hole (61). A third hole (63) is opened on the retaining ring (6) on the other side of the circular groove, and the third hole (63) is connected to the circular groove. The cross-sectional shape of the retaining ring (6) is triangular; The limiting member (81) has a fan-shaped cross-section, and when stationary, the side wall of the limiting member (81) near the second hole (62) is in contact with the wall of the circular groove. The two limiting members (81) corresponding to the same side member (7) have opposite magnetism.

2. The pressurized biomass gasification furnace according to claim 1, characterized in that: The number of downcomers (32) is four, and they are evenly arranged around the center of the upper circular header (12).

3. The pressurized biomass gasification furnace according to claim 1, characterized in that: The internal components of the boiler drum (3) are made of Q345R material, and the riser pipe (31), downcomer pipe (32), ring pipe (13) and column pipe (5) are made of 20G material.

4. A pressurized biomass gasification furnace according to claim 1, characterized in that: The number of tubes (5) is several, and the tubes (5) are evenly arranged around the center of the furnace body (1).

5. A pressurized biomass gasification furnace according to claim 1, characterized in that: The first hole (61) corresponds to the third hole (63) one by one, and the third hole (63) corresponds to the tube (5) one by one.

Images