阅读说明：本技术 一种生物质热裂解水冷炭气联产气化系统 (Biomass thermal cracking water-cooling carbon-gas co-production gasification system ) 是由 王向荣 王海元绪 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种生物质热裂解水冷炭气联产气化系统,包括气化炉、冷却水罐和若干组气体净化系统,气体净化系统包括采用输气管B依次串接的砂滤罐、冷却罐、过滤器、离心分离机、罗茨风机和储气罐；气化炉的出气口通过输气管A与砂滤罐的进气口连接,输气管A上设置有换气阀,出焦斗的出焦口和砂滤罐、冷却罐、过滤器、离心分离机的底端分别通过放液管连接有积液箱,积液箱底部的换液口以及储气罐的释液口均通过换液管道与储液池连接。本发明实现了气化炉产生的生物质燃气与其他杂质的高效分离,与现有技术相比,显著提高了生物质燃气的净化效率,提高了其纯度,进而提高了其燃烧效率。(The invention discloses a water-cooled carbon and gas co-production gasification system for biomass thermal cracking, which comprises a gasification furnace, a cooling water tank and a plurality of groups of gas purification systems, wherein each gas purification system comprises a sand filter tank, a cooling tank, a filter, a centrifugal separator, a Roots blower and a gas storage tank which are sequentially connected in series by a gas transmission pipe B; the gas outlet of the gasification furnace is connected with the gas inlet of the sand filter tank through a gas pipe A, a scavenging valve is arranged on the gas pipe A, the coke outlet of the coke outlet hopper and the bottom ends of the sand filter tank, the cooling tank, the filter and the centrifugal separator are respectively connected with a liquid accumulation box through liquid discharge pipes, and the liquid changing port at the bottom of the liquid accumulation box and the liquid releasing port of the gas storage tank are both connected with a liquid storage tank through liquid changing pipelines. The invention realizes the high-efficiency separation of the biomass gas generated by the gasification furnace from other impurities, obviously improves the purification efficiency of the biomass gas, improves the purity of the biomass gas and further improves the combustion efficiency of the biomass gas.)

1. The utility model provides a living beings thermal cracking water-cooling charcoal gas coproduction gasification system, includes gasifier (1), cooling water pitcher (2) and a plurality of gaseous clean system of group, its characterized in that: the gas purification system comprises a sand filtration tank (3), a cooling tank (4), a filter (5), a centrifugal separator (6), a Roots blower (8) and a gas storage tank (9) which are sequentially connected in series by a gas pipe B (19), wherein a gas outlet (34) of the gasification furnace (1) is connected with a gas inlet of the sand filtration tank (3) through a gas pipe A (14), and a scavenging valve (17) is arranged on the gas pipe A (14); the gasifier (1) is provided with a cooling water jacket A (30), the outer wall of the filter (5) is provided with a cooling water jacket B (64), a cooling area (50) is arranged inside the cooling tank (4), the lower parts of the cooling water jacket A (30), the cooling water jacket B (64) and the cooling area (50) are respectively provided with a cooling water inlet (36), the upper parts of the cooling water jacket A (30), the cooling water jacket B (64) and the cooling area (50) are respectively provided with a cooling water outlet (46), the upper part of the side surface of the cooling water tank (2) is provided with a water return port (21), a water replenishing port (23) and a water outlet (20), the water outlet (20) is connected with the cooling water inlet (36) through a water inlet pipe (12), and the water return port.

2. The system of claim 1, wherein the system comprises: the scavenging valve (17) is of a three-way structure, an A port (171) and a B port (172) of the scavenging valve are connected with the air conveying pipe A (14), a C port (173) of the scavenging valve is connected with the outside air, and control valves (174) are respectively arranged at the A port (171) and the C port (173).

3. The system of claim 1, wherein the system comprises: a volume tank (7) is further arranged between the centrifugal separator (6) and the Roots blower (8), an air inlet of the volume tank (7) is connected with an air outlet of the centrifugal separator (6) through an air conveying pipe B (19), and an air outlet of the volume tank (7) is connected with an air inlet of the Roots blower (8) through the air conveying pipe B (19).

4. The system of claim 3, wherein the system comprises: the top of the gasification furnace (1) is provided with an oxygen-blocking smoke exhaust pipe (48) and a feeding port (49), the middle part is provided with a gas collecting pipe (33) and an ignition overhaul port (45) matched with a quick opening door (44), the lower part is provided with a gas belt (42), the bottom is connected with a detachable charcoal discharging box (39), the gas collecting pipe (33) extends into the gasification furnace (1) and the end part of the gas collecting pipe is provided with a carbon blocking gas collecting plate (32), the tail end of the gas collecting pipe (33) is connected with the gas belt (42) through a gas collecting cooling pipe (43), the side surface of the gas belt (42) is provided with a gas outlet (34), the bottom of the gas belt is provided with a coke outlet hopper (41), a sewage draining outlet (40) is arranged on the side surface of the coke outlet hopper (41), a coke outlet (37) is arranged at the bottom of the coke outlet hopper, a through hole is arranged on a connecting plate between the gas belt (42) and the coke discharging hopper (41), and a carbon discharging auger (38) is arranged in the carbon discharging box (39); the cooling water jacket A (30) is arranged on the outer walls of the gasifier body (1), the gas collection cooling pipe (43) and the gas belt (42) and communicated with each other, and the gas collection cooling pipe (43) is provided with a regulation control valve.

5. The system of claim 4, wherein the system comprises: the bottom ends of the coke outlet (37), the sand filtering tank (3), the cooling tank (4), the filter (5), the centrifugal separator (6) and the volume tank (7) are respectively connected with a liquid accumulation tank (18), the bottoms of the liquid accumulation tank (18) and the gas storage tank (9) are connected with a liquid storage tank (11) through a liquid changing pipeline (16), an extraction pipe (65) is arranged on the liquid storage tank (11), and a plurality of adjusting control valves are arranged on the liquid changing pipeline (16).

6. The system of claim 5, wherein the system comprises: the pressure-supply pipe is connected to the top of the liquid accumulation box (18), the pressure-supply pipe (15) is connected with an air outlet (26) of the air tank (10), an air inlet (28) is formed in the lower portion of the side face of the air tank (10), a pressure release port (27) is formed in the top of the air tank (10), a pressure gauge (29) is arranged at the top of the air tank (10), liquid accumulation boxes (18), the side wall of the cooling water tank (2) and the bottom side wall of the air storage tank (9) are provided with liquid level meters (24), and a plurality of adjusting control valves are arranged on the pressure-supply pipe (15).

7. The system of claim 1, wherein the system comprises: the cooling water tank (2) is provided with an exhaust port (22) at the top and a slag removal port (25) at the bottom, and a plurality of adjusting control valves are respectively arranged on the water inlet pipe (12), the water return pipe (13), the gas conveying pipe A (14) and the gas conveying pipe B (19).

8. The system of claim 1, wherein the system comprises: a fixing plate A (51) and a fixing plate B (54) are horizontally and fixedly arranged in the cooling tank (4), and the cooling tank (4) is divided into an upper air bin (52), a cooling area (50) and a lower air bin (55) from top to bottom by the fixing plate A (51) and the fixing plate B (54); the side surface of the upper air bin (52) is connected with an air outlet of the sand filtration tank (3) through the air conveying pipe B (19); a plurality of vertically distributed vent pipes A (56) are uniformly fixed on the cooling area (50), the upper end and the lower end of each vent pipe A (56) respectively penetrate through the fixing plate A (51) and the fixing plate B (54), and a cooling water flowing area (57) is arranged outside each vent pipe A (56); an air outlet pipe (53) penetrates through the middle parts of the fixing plate A (51) and the fixing plate B (54), the bottom end of the air outlet pipe (53) is positioned in the lower air chamber (55), and the top end of the air outlet pipe penetrates through the upper air chamber (52) and is connected with an air inlet of the filter (5) through the air conveying pipe B (19).

9. The system of claim 1, wherein the system comprises: filter (5) top is passed through gas-supply pipe B (19) with the air inlet of centrifuge (6) is connected, the outside is provided with cooling water jacket B (64), fixed plate C (61) that inside top fixed connection has the level to set up, and this fixed plate C (61) upper surface middle part is provided with breather pipe B (62) through support column (59) fixedly connected with choke buffering sieve board (60), lower surface middle part intercommunication, breather pipe B (62) bottom through sieve net board (63) with the internal wall fixed connection of jar of filter (5), this breather pipe B (62) outer wall encircle fixed spiral flow path (58) that are provided with top-down and distribute, are close to the air inlet has been seted up to the jar body on spiral flow path (58) top.

10. The system of claim 4, wherein the system comprises: the gas collecting pipe (33) and the ignition overhaul port (45) are fixedly provided with a fire-resistant layer (31) in the arrangement area, the middle part of the oxygen-resistant and smoke-exhaust pipe (48) is provided with a smoke-resistant valve (47), and the side surface of the gas belt (42) is provided with a water injection port (35).

Technical Field

The invention relates to the field of biomass gas preparation and purification systems, in particular to a biomass thermal cracking water-cooling carbon gas co-production gasification system.

Background

Efficient conversion of biomass energy has now been the subject of major research in the energy field. Currently, biomass energy conversion technologies mainly include biomass gasification, liquefaction, solidification and direct combustion technologies, wherein the biomass gasification technologyTechnology is an important means to achieve biomass energy conversion. The biomass gasification refers to the process of cracking biomass raw materials (straws, sawdust, firewood and the like) in a gasification furnace under an anoxic condition after compression molding or simple crushing treatment, and the principle is that under a certain thermodynamic condition, by the action of partial air or oxygen and water vapor, high polymers of the biomass are subjected to cracking, oxidation, reduction and reforming reactions, and tar associated with pyrolysis is further subjected to thermal cracking or catalytic cracking to form micromolecule hydrocarbon compounds, such as compounds containing CO and H₂、CH₄The mixed gas of (2), i.e. biomass gas.

At present, a biomass gasification and purification system is popularized and applied in a plurality of provinces of China, a straw biomass gasification station is built in a village where farmers live in a concentrated manner, and combustible gas is connected to each household through pipelines, so that gas fuel for cooking and heating of residents in the whole village can be solved. The main equipment of the existing biomass gasification and purification system comprises a chopper, a feeding device, a downflow type gasification furnace, a cyclone separator, a cooler, a filter, a fan, a water seal, a variable volume type gas storage tank (a gas cabinet), a flame arrester and the like. The flow of the fuel gas is realized by the drawing force of the fan, the fuel gas coming out of the fan has certain pressure and is sent into the variable-volume gas storage tank through the water seal device, the variable-volume gas storage tank is divided into a dry type and a wet type, the fuel gas in the variable-volume gas storage tank can keep constant pressure, the pressure value needs to ensure the required pressure in front of a user stove farthest from the gasification station, and the fuel gas pressure value of the conventional variable-volume gas storage tank is mostly P ═ 4000 and 5000Pa, and belongs to low-pressure gas storage. The existing biomass gasification and purification system generally has the technical problem of low purification efficiency, so that the purity of the treated biomass gas is low, and the combustion efficiency is not high enough.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a biomass thermal cracking water-cooling carbon gas co-production gasification system which can continuously generate gas and obviously improve the purification efficiency and purity of biomass fuel gas.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows: a water-cooled carbon and gas co-production gasification system for biomass thermal cracking comprises a gasification furnace, a cooling water tank and a plurality of groups of gas purification systems, wherein each gas purification system comprises a sand filter tank, a cooling tank, a filter, a centrifugal separator, a Roots blower and a gas storage tank which are sequentially connected in series by a gas pipe B; the gasifier is provided with a cooling water jacket A, the outer wall of the filter is provided with a cooling water jacket B, a cooling area is arranged in the cooling tank, the lower parts of the cooling water jacket A, the cooling water jacket B and the cooling area are respectively provided with a cooling water inlet, the upper parts of the cooling water jacket A, the cooling water jacket B and the cooling area are respectively provided with a cooling water outlet, the upper parts of the side surfaces of the cooling water tank are provided with a water return port and a water replenishing port, the lower parts of the side surfaces of the cooling water tank are provided with water outlets, the water outlets are connected with.

Furthermore, the scavenging valve is of a three-way structure, the port A and the port B are connected with the air conveying pipe A, the port C is connected with the outside air, and the port A and the port C are respectively provided with a control valve.

Furthermore, a volume tank is arranged between the centrifugal separator and the Roots blower, an air inlet of the volume tank is connected with an air outlet of the centrifugal separator through the air conveying pipe B, and an air outlet of the volume tank is connected with an air inlet of the Roots blower through the air conveying pipe B.

Further, the top of the gasification furnace is provided with an oxygen-blocking smoke exhaust pipe and a feeding port, the middle part of the gasification furnace is provided with a gas collecting pipe and an ignition maintenance port matched with a quick-opening door, the lower part of the gasification furnace is provided with a gas belt, the bottom of the gasification furnace is connected with a detachable coke discharging box, the gas collecting pipe extends into the gasification furnace, the end part of the gas collecting pipe is provided with a carbon-blocking gas collecting plate, the tail end of the gas collecting pipe is connected with the gas belt through a gas-collecting cooling pipe, the side surface of the gas belt is provided with a gas outlet, the bottom of the gas belt is provided with a coke discharging hopper, the side surface of the coke discharging hopper is provided with a sewage discharge port, the bottom of the coke; the cooling water jacket A is arranged on the gasifier body, the gas collection cooling pipe and the outer wall of the gas belt and communicated with each other, and the gas collection cooling pipe is provided with an adjusting control valve.

Further, the bottom ends of the coke outlet, the sand filter tank, the cooling tank, the filter, the centrifugal separator and the volume tank are respectively connected with a liquid accumulation tank, the bottoms of the liquid accumulation tank and the gas storage tank are respectively connected with a liquid storage tank through liquid changing pipelines, a drawing pipe is arranged on the liquid storage tank, and a plurality of adjusting control valves are arranged on the liquid changing pipelines.

Further, the top of the liquid accumulating box is connected with a pressure supply pipe, the pressure supply pipe is connected with an air outlet of the air tank, an air inlet is formed in the lower portion of the side face of the air tank, a pressure release port is formed in the top of the air tank, a pressure gauge is arranged at the top of the air tank, liquid level meters are arranged on the side walls of the liquid accumulating box and the cooling water tank and on the side wall of the bottom of the air storage tank, and a plurality of adjusting control valves are arranged on the pressure supply pipe.

Further, the top of the cooling water tank is provided with an air outlet, the bottom of the cooling water tank is provided with a slag removal port, and the water inlet pipe, the water return pipe, the gas pipe A and the gas pipe B are respectively provided with a plurality of adjusting control valves.

Further, a fixing plate A and a fixing plate B are horizontally and fixedly arranged in the cooling tank, and the fixing plate A and the fixing plate B divide the cooling tank into an upper air bin, a cooling area and a lower air bin from top to bottom; the side surface of the upper air bin is connected with an air outlet of the sand filtration tank through the air conveying pipe B; a plurality of vertically distributed vent pipes A are uniformly fixed in the cooling area, the upper end and the lower end of each vent pipe A respectively penetrate through the fixing plate A and the fixing plate B, and a cooling water flowing area is arranged outside each vent pipe A; and the middle parts of the fixed plate A and the fixed plate B are penetrated with air outlet pipes, the bottom ends of the air outlet pipes are positioned in the lower air bin, and the top ends of the air outlet pipes penetrate out of the upper air bin and are connected with the air inlet of the filter through the air conveying pipe B.

Further, the filter top is passed through gas-supply pipe B with centrifuge's air inlet is connected, the outside is provided with cooling jacket B, the fixed plate C that inside top fixed connection has the level to set up, and this fixed plate C upper surface middle part is provided with breather pipe B through support column fixedly connected with choke buffering sieve, lower surface middle part intercommunication, breather pipe B bottom through the screen cloth board with the internal wall fixed connection of jar of filter, this breather pipe B outer wall encircle the fixed spiral flow way that is provided with top-down and distributes, are close to the jar body on spiral flow way top has seted up the air inlet.

Furthermore, a flame retardant coating is fixed in the arrangement area of the gas collecting pipe and the ignition overhaul port, a smoke-blocking valve is arranged in the middle of the oxygen-blocking and smoke-discharging pipe, and a water injection port is formed in the side face of the gas belt.

Compared with the prior art, the invention has the following technical effects:

(1) the invention adopts the gasification furnace and the gas purification system consisting of the sand filter tank, the cooling tank, the filter, the centrifugal separator, the Roots blower and the gas storage tank to realize the high-efficiency separation of the biomass gas generated by the gasification furnace and other impurities.

(2) The invention adopts the integrally formed gasification furnace, and the top of the integrally formed gasification furnace is provided with the charging hole, so that a large amount of charging or continuous charging can be realized at one time, and a foundation is laid for the continuous work of the gasification furnace; the main body part cracks the ignited biomass raw material into other components such as biomass gas, tar, biomass charcoal and the like by utilizing the thermodynamic principle, and realizes the maximum collection of other gas components such as the biomass gas and gasified tar by adopting the gas collecting pipe, and leads the components into the gas band for temporary storage through the gas collecting cooling pipe; the biomass charcoal generated by cracking is discharged under the action of a charcoal discharging auger in the charcoal discharging box. Therefore, the gasification furnace can obviously improve the catalytic efficiency of the gasification furnace, further improve the gas production speed of the gasification furnace, reduce the consumption of fuel gas by cracking, has large space in the furnace body and few blocking parts, can effectively improve the stacking density of raw materials, improve the gas production rate and the uniformity and continuity of the gas production, further improve the utilization rate of biomass raw materials, and can obviously improve the thermal efficiency of the gasification furnace and reduce the energy consumption of gasification.

(3) The cooling water jacket A is arranged on the gasification furnace of the gasification furnace, so that the temperature of the furnace body and the gas collecting pipe can be effectively reduced, the service life of the gasification furnace can be prolonged, the condensation efficiency of steam such as wood tar, wood vinegar and the like can be effectively improved, the steam is condensed to the maximum extent in the gas collecting pipe and the gas collecting cooling pipe and is discharged through the coke discharging hopper at the bottom of the gas zone to enter the next treatment process, and the gasification furnace has important significance for improving the purity of biomass gas.

(4) According to the invention, the biomass fuel gas generated by the gasification furnace is introduced into the sand filter tank, and the high-efficiency separation between gas and liquid impurities is realized by utilizing the sand filter principle, so that the purity of the gas can be effectively improved, and the method has a remarkable popularization prospect.

(5) According to the invention, the cooling tank is arranged behind the sand filter tank, the fixed plate A and the fixed plate B are adopted in the cooling tank to divide the interior of the tank body into the upper air bin, the cooling water flowing area and the lower air bin from top to bottom in sequence, wherein the upper air bin not only can play a role of buffering the mixed air pressure, but also can ensure the speed uniformity of the mixed air flowing into the cooling water flowing area, the cooling water flowing area adopts cooling water in the direction opposite to the air flowing direction, the cooling efficiency can be effectively improved, the cooling effect can be ensured, the next bin skillfully utilizes the gravity difference of liquid and air, and the separation efficiency can be obviously improved.

(6) The filter of the invention adopts the mode of arranging the spiral flow passage in the tank body, prolongs the flow path of the gas, obviously reduces the down-flow speed of the gas after entering the tank body, slows down the smoothness of the down-flow of the gas, improves the condensation efficiency of grease impurities, and improves the efficiency of gas-liquid separation and the purity of the gas.

(7) The centrifugal machine is arranged behind the filter, so that the obvious density difference between gas and liquid impurities is skillfully utilized, after the gas carrying the liquid impurities enters the middle vent pipe in the tank body, the liquid impurities are quickly thrown out of the meshes of the middle vent pipe under the action of centrifugal force and continuously thrown to the inner wall of the tank body, in the process, the gas continuously flows upwards through the middle vent pipe and enters the next processing link from the gas outlet, the thrown liquid impurities are attached to the screen or the inner wall of the tank body, and then the gas is collected towards the bottom of the pipe body due to the self gravity and enters the liquid accumulating tank through the liquid discharge pipe for storage, so that the high-efficiency separation of the gas and the liquid impurities is realized, the purity and the cleanliness of the gas are ensured, and the centrifugal machine has obvious popularization prospect.

(8) According to the invention, the liquid accumulation box is connected below the coke discharging hopper, the sand filter tank, the cooling tank, the filter, the centrifuge, the volume tank and the gas storage tank of the gasification furnace, so that liquid impurities generated in each treatment link can be effectively collected, and the problems of environmental pollution and resource waste caused by liquid flowing into the external environment are avoided. Meanwhile, the liquid level meter is arranged on the side face of the liquid storage box, so that the storage capacity of liquid impurities in the liquid storage box can be greatly known in real time, the pressure supply pipe is connected to the top of the liquid storage box, and the technical problem that liquid drainage is difficult due to the viscous force between the oil impurities and the inner wall of the liquid storage box can be effectively solved.

Drawings

Fig. 1 is a schematic view of the connection structure of the present invention.

FIG. 2 is a schematic view of the structure of the gasification furnace of the present invention.

Fig. 3 is a schematic view of the structure of the cooling tank of the present invention.

Fig. 4 is a top view of plane a-a in fig. 3.

Fig. 5 is a schematic view of the filter of the present invention.

Fig. 6 is a schematic view showing the structure of the cooling water tank of the present invention.

Fig. 7 is a schematic view of the structure of the gas exchange valve of the present invention.

Fig. 8 is a schematic view of the structure of the air tank of the present invention.

In the figure: 1. a gasification furnace, 2, a cooling water tank, 3, a sand filter tank, 4, a cooling tank, 5, a filter, 6, a centrifugal separator, 7, a volume tank, 8, a Roots blower, 9, a gas storage tank, 10, an air tank, 11, a liquid storage tank, 12, a water inlet pipe, 13, a water return pipe, 14, a gas conveying pipe A, 15, a pressure supply pipe, 16, a liquid change pipeline, 17, a scavenging valve, 171, an A port, a 172, a B port, 173, a C port, 174, a control valve, 18, a liquid accumulation tank, 19, a gas conveying pipe B, 20, a water outlet, 21, a water return port, 22, an exhaust port, 23, a water replenishing port, 24, a liquid level meter, 25, a slag removal port, 26, an air output port, 27, a pressure release port, 28, an air input port, 29, a pressure gauge, 30, a cooling water jacket A, 31, a fire-resistant layer, 32, a carbon-blocking gas collecting plate, 33, a gas collecting pipe, 34, an air outlet, 35, a, 38. the device comprises a charcoal discharging auger 39, a charcoal discharging box 40, a sewage discharge outlet 41, a coke discharging hopper 42, a gas belt 43, a gas collection cooling pipe 44, a quick opening door 45, an ignition overhaul port 46, a cooling water outlet 47, a smoke stop valve 48, an oxygen stop and smoke discharge pipe 49, a charging port 50, a cooling area 51, fixing plates A and 52, an upper gas bin 53, a gas outlet pipe 54, fixing plates B and 55, a lower gas bin 56, a vent pipe A and 57, a cooling water flowing area 58, a spiral flow channel 59, a support column 60, a gas stop buffer sieve plate 61, fixing plates C and 62, vent pipes B and 63, a sieve plate 64, a cooling water jacket B and 65 and a discharge pipe.

Detailed Description

The invention is further described in the following description with reference to the drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, the system comprises a gasification furnace 1, a cooling water tank 2 and a plurality of groups of gas purification systems, wherein each gas purification system comprises a sand filtration tank 3, a cooling tank 4, a filter 5, a centrifugal separator 6, a roots blower 8 and a gas storage tank 9 which are sequentially connected in series by a gas pipe B19, a gas outlet 34 of the gasification furnace 1 is connected with a gas inlet of the sand filtration tank 3 through a gas pipe A14, and a gas exchange valve 17 is arranged on the gas pipe A14; the gasification furnace 1 is provided with a cooling water jacket A30, the outer wall of the filter 5 is provided with a cooling water jacket B64, the cooling tank 4 is internally provided with a cooling area 50, the lower parts of the cooling water jacket A30, the cooling water jacket B64 and the cooling area 50 are respectively provided with a cooling water inlet 36, the upper part of the cooling area 50 is respectively provided with a cooling water outlet 46, the upper part of the side surface of the cooling water tank 2 is provided with a water return port 21 and a water replenishing port 23, the lower part of the side surface of the cooling water tank is provided with a water outlet 20, the water outlet 20 is connected with the cooling water inlet.

Preferably, the scavenging valve 17 is a three-way structure, the port a 171 and the port B172 are connected with the air pipe a14, the port C173 is connected with the outside air, and the ports a 171 and C173 are respectively provided with the control valve 174.

Preferably, a volume tank 7 is further arranged between the centrifugal separator 6 and the roots blower 8, an air inlet of the volume tank 7 is connected with an air outlet of the centrifugal separator 6 through an air conveying pipe B19, and an air outlet of the volume tank 7 is connected with an air inlet of the roots blower 8 through an air conveying pipe B19.

Preferably, the top of the gasification furnace 1 is provided with an oxygen-blocking smoke exhaust pipe 48 and a feeding port 49, the middle part is provided with a gas collecting pipe 33 and an ignition overhaul port 45 matched with a quick opening door 44, the lower part is provided with a gas belt 42, the bottom is connected with a detachable coke discharging box 39, the gas collecting pipe 33 extends into the gasification furnace 1, the end part of the gas collecting pipe 33 is provided with a carbon-blocking gas collecting plate 32, the tail end of the gas collecting pipe 33 is connected with the gas belt 42 through a gas-collecting cooling pipe 43, the side surface of the gas belt 42 is provided with a gas outlet 34, the bottom is provided with a coke discharging hopper 41, the side surface of the coke discharging hopper 41 is provided with a sewage outlet 40, the bottom is provided with a coke discharging port 37, a connecting plate between the gas belt 42; the cooling water jacket A30 is arranged on the outer walls of the gasification furnace 1, the gas-collecting cooling pipe 43 and the gas belt 42 and communicated with each other, and the gas-collecting cooling pipe 43 is provided with a regulating control valve.

Preferably, the bottom ends of the coke outlet 37, the sand filtering tank 3, the cooling tank 4, the filter 5, the centrifugal separator 6 and the volume tank 7 are respectively connected with a liquid accumulating tank 18, the bottoms of the liquid accumulating tank 18 and the gas storage tank 9 are respectively connected with a liquid storage tank 11 through a liquid changing pipeline 16, an extraction pipe 65 is arranged on the liquid storage tank 11, and a plurality of adjusting control valves are arranged on the liquid changing pipeline 16.

Preferably, the top of the liquid accumulation box 18 is connected with a pressure supply pipe 15, the pressure supply pipe 15 is connected with an air outlet 26 of the air tank 10, the lower part of the side surface of the air tank 10 is provided with an air inlet 28, the top of the air tank 10 is provided with a pressure release port 27, the top of the air tank 10 is provided with a pressure gauge 29, the liquid accumulation box 18, the side wall of the cooling water tank 2 and the side wall of the bottom of the air storage tank 9 are all provided with a liquid level meter 24, and the pressure supply pipe 15 is provided.

Preferably, the cooling water tank 2 is provided with an exhaust port 22 at the top and a slag removal port 25 at the bottom, and the water inlet pipe 12, the water return pipe 13, the air pipe A14 and the air pipe B19 are respectively provided with a plurality of adjusting control valves.

Preferably, a fixing plate A51 and a fixing plate B54 are horizontally and fixedly arranged in the cooling tank 4, and the fixing plate A51 and the fixing plate B54 divide the cooling tank 4 into an upper air chamber 52, a cooling area 50 and a lower air chamber 55 from top to bottom; the side surface of the upper air bin 52 is connected with an air outlet of the sand filter tank 3 through an air conveying pipe B19; a plurality of vertically distributed vent pipes A56 are uniformly fixed in the cooling area 50, the upper end and the lower end of the vent pipe A56 respectively penetrate through the fixing plate A51 and the fixing plate B54, and a cooling water flowing area 57 is arranged outside the vent pipe A56; an air outlet pipe 53 penetrates through the middle parts of the fixing plate A51 and the fixing plate B54, the bottom end of the air outlet pipe 53 is positioned in the lower air chamber 55, and the top end of the air outlet pipe 53 penetrates through the upper air chamber 52 and is connected with an air inlet of the filter 5 through an air conveying pipe B19.

Preferably, the top end of the filter 5 is connected with an air inlet of the centrifugal separator 6 through an air pipe B19, a cooling water jacket B64 is arranged outside, a horizontally arranged fixing plate C61 is fixedly connected above the inside of the filter 5, the middle part of the upper surface of the fixing plate C61 is fixedly connected with an air-blocking buffer sieve plate 60 through a support column 59, the middle part of the lower surface of the fixing plate C61 is communicated with an air vent pipe B62, the bottom end of the air vent pipe B62 is fixedly connected with the inner wall of a tank body of the filter 5 through a sieve plate 63, the outer wall of the air vent pipe B62 is fixedly provided with spiral flow.

Preferably, the flame retardant coating 31 is fixed in the arrangement areas of the gas collecting pipe 33 and the ignition overhaul port 45, the middle part of the oxygen and smoke preventing pipe 48 is provided with a smoke preventing valve 47, and the side surface of the gas belt 42 is provided with a water injection port 35.

The working process of the invention is as follows:

before the coke oven works, sufficient tap water is injected into the cooling water tank 2 from the water replenishing port 23, the Roots blower 8 is connected with a power supply to ensure that the sewage outlet 40 and the coke outlet 37 are in a closed state, the water injection port 35 is connected with the tap water pipe, water is injected into the gas zone 42, the water penetrates through the through hole downwards after entering the gas zone 42 and enters and fills the coke outlet hopper 41, the gas zone 42 is gradually filled, and the water injection is stopped when the water level is higher than the joint of the gas collection cooling pipe 43 and the gas zone 42; connecting an air input port 28 of the air tank 10 with an air compressor, so that sufficient air is stored in the air tank, paying attention to the scale of a pressure gauge 29 in the process, and opening a pressure relief port 27 to relieve pressure in time if the pressure reaches the upper line; connecting the air outlet of the air storage tank 9 with the air inlet of the boiler, and starting a power system of the centrifuge 6; at this time, the biomass charcoal is continuously fed into the gasification furnace 1 from the feed opening 49 by adopting an automatic feeding system or a manual mode, the feeding is stopped until the ignition overhaul port 45 is completely filled with the biomass charcoal, and the pretreated biomass raw material is added (the feeding mode and the path are the same as the feeding mode of the biomass charcoal) until the gasification furnace 1 is filled with the biomass raw material.

At the moment, the Roots blower 8 is started, a small amount of air is pumped into the furnace body 1 from the feeding port 49 and the oxygen-blocking smoke exhaust pipe 48, ignition is carried out at the self-ignition inspection port 45 by adopting a manual or automatic ignition mode, the quick opening door 44 at the ignition inspection port 45 is closed after ignition, at the moment, the biomass raw material is cracked under the thermodynamic action in the oxygen-deficient environment to generate biomass gas, wood tar, wood vinegar and the like, the wood tar, the wood vinegar and the like are also evaporated into gas under the high temperature generated by continuous combustion, due to the continuous work of the Roots blower 8, the mixed gas of the biomass gas and other gases respectively enters the self-blocking carbon gas collecting plates 32 into the gas collecting pipes 33 and flows into the gas bands 42 from the corresponding gas collecting cooling pipes 43, the gas components flow upwards after the mixed gas enters the gas bands 42, and the water in the gas bands 42 washes the carbon powder and ash contained in the flowing process, during the process and after the mixed gas enters the gas belt 42, the mixed gas is affected by the low temperature of the gas collecting pipe 33, the gas collecting cooling pipe 43 and the cooling water jacket a30 outside the gas belt 42, so that the pyroligneous liquor, the wood tar and other gases in the mixed gas are cooled to be in a liquid state, therefore, after the mixed gas enters the gas belt 42, the pyroligneous liquor, the wood tar and other liquids enter the coke discharging hopper 41 through the filter plate, at this time, the a port 171 control valve 174 of the ventilation valve 17 is opened, and the biomass gas and other gases (including uncooled parts of the wood tar and wood tar steam) which may be mixed flow into the biomass gas purification system for purification treatment under the action of the induced draft fan or the roots fan 8; in the process, along with the continuous cracking of the biomass straws and the continuous output of the biomass gas, the biomass charcoal is continuously generated, the biomass charcoal enters the charcoal outlet box 39 under the action of gravity, and the biomass charcoal added before production and the biomass charcoal generated by the subsequent cracking can be continuously discharged only by opening the driving motor of the charcoal outlet auger 38.

The biomass gas and other gases (including uncooled parts of wood tar and pyroligneous liquor vapor) flowing out from the gas outlet 34 of the gasification furnace 1 firstly enter the sand filter tank 3, the biomass gas and other gases possibly mixed entering the sand filter tank 3 have to generate friction with sand therein in the flowing process, carbon powder and liquid impurities such as wood tar and pyroligneous liquor possibly mixed therein can be scraped off in the flowing process, the scraped impurities such as carbon powder, wood tar and pyroligneous liquor downwards enter the liquid collecting tank 18, and the biomass gas is discharged from the gas outlet of the sand filter tank 3 and enters the cooling tank 4 through the gas conveying pipe B19 for further treatment; the biomass gas entering the cooling tank 4 firstly enters the upper gas bin 52 and flows downwards from the vent pipe A56 to enter the lower gas bin 55, and because the outer side of the vent pipe A56 is a cooling water flowing area 57, the biomass gas is inevitably influenced by low temperature in the process, so that pyroligneous liquid and wood tar steam which are still possibly carried in the biomass gas are cooled and enter the liquid collecting tank 18 from the bottom of the lower gas bin 55, and the cooled biomass gas flows upwards from the gas outlet pipe 53, is discharged from the gas outlet and then enters the filter 5 through the gas conveying pipe B19; the biomass gas entering the filter 5 flows downwards along the spiral flow passage 58, and because the outer wall of the filter 5 is provided with the cooling water jacket B64, the biomass gas is influenced by low temperature in the flowing process, so that pyroligneous liquor and wood tar steam which are still possibly carried in the biomass gas are cooled, the pyroligneous liquor and the wood tar obtained by cooling pass through the screen plate 63 together with the biomass gas to enter the bottom of the filter 5, the pyroligneous liquor and the wood tar entering the bottom of the filter 5 downwards enter the liquid accumulation box 18 under the action of gravity, and the biomass gas flows upwards from the vent pipe B62 under the action of the Roots blower 8, is further scraped by the gas barrier buffer screen plate 60, is discharged from a gas outlet and enters the centrifuge 6 through the gas conveying pipe B19; the biomass fuel gas entering the centrifuge 6 is subjected to strong centrifugal action, so that a small amount of liquid and solid impurities possibly carried in the biomass fuel gas are further separated from the fuel gas, the separated impurities enter the liquid accumulation box 18 arranged at the bottom of the liquid accumulation box, the separated biomass fuel gas enters the solvent tank 7 through the gas conveying pipe B19 under the action of the Roots blower 8, is separated completely and then is conveyed to the gas storage tank 9 through the Roots blower 8 for storage, and in the long-term storage process, the very small amount of impurities possibly carried in the biomass fuel gas are further separated under the action of gravity and enter the liquid accumulation box 18; if the boiler needs to be supplied with gas, a valve of a pipeline between the gas outlet of the gas storage tank 9 and the gas inlet of the boiler is opened, and clean biomass gas continuously enters the boiler to be supplied for combustion.

In the process, the coke discharging hopper 41, the sand filter tank 3, the cooling tank 4, the filter 5, the centrifuge 6, the volume tank 7 and the liquid accumulating tank 18 below the gas storage tank 9 gradually flow into the liquid storage tank 11 only by opening the control valve on the liquid changing pipeline 16; since both the wood tar and the pyroligneous liquor are oily substances, the flowing speed can be slow, and in order to ensure smooth flowing and discharging, a control valve on the pressure supply pipe 15 can be opened, so that the air in the air tank 10 gradually enters the top of each liquid accumulation box 18 to increase the pressure of the wood tar and the pyroligneous liquor.

In order to ensure continuous gas production, in the above process, an automatic feeding system or a manual mode can be adopted to continuously feed the biological raw materials into the gasification furnace 1 from the feeding port 49, and the above process is repeated; if gas production is required to be stopped, feeding is stopped, the feeding port 49 and the smoke stop air valve 47 are closed to realize furnace sealing, the control valve 174 at the port A171 of the scavenging valve 17 is closed, and meanwhile, the control valve 174 at the port C173 is opened, so that air enters the gas transmission pipeline B, the sand filter tank 3, the cooling tank 4, the filter 5, the centrifugal separator 6, the volume tank 7, the Roots blower 8 and the gas storage tank 9, all residual biomass gas in the biomass gas is discharged, and safety is ensured.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.