Tubular gasification furnace
By designing a tubular gasifier, controlling the proportion of air, oxygen and steam, the problem of lack of mature gasifiers in the existing technology is solved, and the controllability and efficient production of synthesis gas is achieved, providing a reliable source of raw materials for the production of green methanol.
Patent Information
- Application Number
- CN202421795484.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The lack of mature gasifiers that can be used in the biological methanol production route in the prior art has led to the inability to effectively control the synthesis gas composition and limit the production of green methanol.
A tubular gasifier is designed to generate syngas by setting a spiral shaft and a nozzle box in the furnace body to control the ratio of air, oxygen and steam. The furnace shell is metal material, the inner cavity is coated with a refractory layer, and is monitored and controlled in real time through observation holes and thermocouples.
The controllability of synthesis gas is achieved, the quality and output of synthesis gas are improved, and can be used as raw material for green methanol or for power generation, saving energy consumption.
Smart Images
Figure CN222948304U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of biomass gasification equipment, in particular to a tubular gasifier. Background Art
[0002] At present, there is no clear definition of the concept of "green methanol" in the world. Whether methanol is green or not mainly depends on the sources of hydrogen and carbon dioxide, the raw materials for methanol synthesis. According to the recommendations of the International Renewable Energy Agency (IRENA), methanol is divided into green methanol, blue methanol, gray methanol and brown methanol according to the source of its production raw materials. When the sources of hydrogen and carbon dioxide are both renewable, the synthesized methanol can be identified as green methanol, that is, green methanol. At present, there are two main production process routes for green methanol:
[0003] The first is the electricity-to-methanol route, which is to obtain green electricity through solar power, wind power, and photovoltaics, electrolyze water to produce hydrogen, and synthesize methanol by capturing carbon dioxide.
[0004] The second is the bio-methanol route, which is to convert biomass from raw materials such as straw into carbon monoxide and hydrogen through cracking or pyrolysis, and then produce hydrogen through high-temperature pyrolysis of water to synthesize methanol.
[0005] Compared with the route of producing methanol from fossil energy, the process production route of green methanol can achieve near-zero or even negative carbon dioxide emissions, which will help the industrial and transportation sectors achieve carbon neutrality goals. Among them, the biological methanol route has the advantages of renewability, low carbon emissions, and environmental friendliness. At the same time, it can also effectively utilize biomass resources such as agricultural and forestry waste, which is conducive to solving energy bottlenecks and environmental pollution problems. Based on this background, the applicant has researched and developed a tubular gasifier that can be used in the biological methanol route. Utility Model Content
[0006] The technical problem to be solved by the utility model is: to provide a controllable tubular gasification furnace for synthesis gas, into which air, oxygen and steam in different proportions are input, and by controlling the proportions of various gas amounts, synthesis gas with different components is obtained, which can be used for different purposes. The main components of the synthesis gas are carbon monoxide and hydrogen, as well as a small amount of methane and carbon dioxide, and it basically does not contain tar. It can be provided as a raw material to manufacturers of green methanol, and can also be matched with a generator set to generate electricity.
[0007] At present, there is no mature gasifier that can be used for the biomethanol route in China. Based on the huge amount of agricultural and forestry waste in my country and the demand for green methanol, a tubular gasifier that can be used in the biomethanol route is designed. The tubular gasifier includes: a furnace body, which is a tubular structure, and the furnace body is horizontally fixedly installed on several bases in the front and back directions, and the furnace body is supported by each base. The front end opening of the furnace body is sealed and covered by the front head, and the rear end opening of the furnace body is sealed and covered by the rear head; a spiral shaft is arranged in the inner cavity of the furnace body, and the front end seal of the spiral shaft passes through the through hole on the front head and is supported by the front bearing group and is arranged on the front head, and the rear end seal of the spiral shaft passes through the through hole on the rear head and is supported by the rear bearing group and is arranged on the rear head, and the spiral shaft is driven to rotate by the main drive device located outside the furnace body. A material feed port connected to the inner cavity of the furnace body is provided at the top of the front section of the furnace body, and a material feeding device is arranged on the material feed port; an ignition port connected to the inner cavity of the furnace body is provided at the front section of the furnace body, and a door is installed at the ignition port through a detachable structure or a hinge, and the detachable structure can be realized by a plurality of bolts, a connecting flange is provided at the ignition port, and the door is connected to the connecting flange through a plurality of bolts; an ash outlet connected to the inner cavity of the furnace body is provided at the bottom of the rear section of the furnace body, and an ash outlet device is arranged at the ash outlet.
[0008] A plurality of gas inlets connected to the inner cavity of the furnace body are arranged at intervals from front to back at the bottom of the furnace body, and a nozzle box is sealed and connected to each gas inlet. A partition is arranged in the nozzle box, and the partition separates the inner cavity of the nozzle box from top to bottom to form an upper cavity and a lower cavity. A plurality of vertical through holes are arranged on the partition, and each nozzle located above the partition is vertically placed and the air inlet of each nozzle is sealed and connected to the corresponding vertical through holes respectively. A concrete layer is arranged in the upper cavity to bury the part below the jet hole of each nozzle; at least one nozzle box is selected as a steam inlet nozzle box, and the remaining nozzle boxes are selected as other gas inlet nozzle boxes, and the number of other gas inlet nozzle boxes is not zero, and two steam inlets connected to the lower cavity of the corresponding steam inlet nozzle box are arranged on each steam inlet nozzle box, and a steam pipe is sealed and connected to each steam inlet. A first valve is provided on each steam pipe; a gas inlet connected to the lower cavity of the corresponding other gas inlet nozzle box is provided on each other gas inlet nozzle box, a gas pipe is sealed and connected to each gas inlet, and a second valve is provided on each gas pipe; the other end of each gas pipe and the other end of each steam pipe are sealed and connected to the main pipe, the air inlet of the main pipe is sealed and connected to the outlet of the gas heat exchange pipe of the heat exchanger, and the inlet of the gas heat exchange pipe of the heat exchanger is sealed and connected to the blowing port of the blower through the air supply pipe; a synthesis gas outlet connected to the inner cavity of the furnace body is provided on the top of the rear section of the furnace body, the synthesis gas outlet is connected to the inlet of the synthesis gas heat exchange pipe of the heat exchanger through the first gas delivery pipe, and the outlet of the synthesis gas heat exchange pipe of the heat exchanger is sealed and connected to the air intake of the induced draft fan through the second gas delivery pipe.
[0009] The screw shaft is made of metal material, and during the normal gasification operation of the tubular gasifier, the temperature inside the furnace is about 800°C. The high-temperature working environment has an impact on the metal material. In order to protect the screw shaft and extend the service life of the screw shaft, this solution provides a layer of refractory mud on the screw shaft and on the spiral blades of the screw shaft. In addition, the screw shaft can also be designed as a hollow shaft structure with a cooling water channel. The water inlet end of the cooling water channel is sealed and connected to the water inlet pipe through a first rotary joint, and the water outlet end of the cooling water channel is sealed and connected to the water outlet pipe through a second rotary joint, and the cooling water is used to cool the screw shaft. The most preferred solution is to provide both a refractory mud layer and a cooling water channel. The combination of the two is better.
[0010] Furthermore, in the aforementioned tubular gasifier, the diameter of the gas pipeline is 135-165 cm, and the diameter of the steam pipeline is 20-30 cm. The optimal solution is: the diameter of the gas pipeline is 150 cm, and the diameter of the steam pipeline is 25 cm.
[0011] The outer shell of the furnace body is made of metal material, and the inner cavity wall of the furnace body is coated with a refractory layer. Therefore, the gasification situation in the inner cavity of the furnace body cannot be directly observed by the naked eye. To address this problem, the present invention provides a number of observation holes connected to the inner cavity of the furnace body from front to back, and a sight glass is installed on each observation hole. The staff can understand the situation inside the furnace body through the sight glass.
[0012] In addition, the present solution has a plurality of first thermocouples for measuring the temperature in the inner cavity of the furnace body at corresponding positions arranged at intervals from front to back on the furnace body, and the gasification temperature in the furnace body is monitored in real time by the first thermocouples. A second thermocouple for measuring the temperature of the gas flowing through the main pipeline is arranged on the main pipeline. A gas detector can also be arranged at the tail of the furnace body or on the first gas delivery pipeline or the second gas delivery pipeline. During the normal operation of the tubular gasifier, the operator can adjust the input of different proportions of air, oxygen, and steam into the furnace according to the temperature of each first thermocouple, the temperature of the second thermocouple, and the composition and proportion of each gas in the synthesis gas detected by the gas detector, and obtain the required synthesis gas by controlling the proportion of each gas volume and the temperature in the furnace body.
[0013] In addition, the present solution has a number of manholes connected to the inner cavity of the furnace body spaced from front to back, each manhole is covered with a cover, and the arrangement of the manholes makes it easier for operators to enter the furnace body when the furnace is shut down for maintenance.
[0014] Furthermore, in the aforementioned tubular gasifier, a sampling tube is provided on the second gas delivery pipeline, and a third valve is provided on the sampling tube. The third valve is in a normally closed state. When the synthesis gas needs to be detected, the third valve is opened to perform sampling.
[0015] Furthermore, in the aforementioned tubular gasification furnace, the material feeding device comprises: a first feed hopper, a second feed hopper, a third feed hopper, a conveyor, a first auger, a second auger and a gate valve, the discharge end of the conveyor is fixedly installed at the side feed port of the first feed hopper, the bottom discharge port of the first feed hopper and the top feed port of the second feed hopper are sealed and connected by a gate valve, the bottom discharge port of the second feed hopper is sealed and conveyed to the side feed port of the third feed hopper by the first auger, and the bottom discharge port of the third feed hopper is sealed and conveyed to the material feed port of the furnace body by the second auger.
[0016] Furthermore, in the aforementioned tubular gasification furnace, the ash discharge device comprises: an ash discharge hopper, an ash discharge auger, and a tail cover shell, the top feed port of the ash discharge hopper is sealed and connected to the ash discharge port of the furnace body, the bottom discharge port of the ash discharge hopper is sealed and connected to the feed port of the ash discharge auger, the discharge port of the ash discharge auger seal passes through the through hole of the side wall of the tail cover shell and then extends into the tail cover shell, the end face of the discharge port of the ash discharge auger is an inclined face, the top of the cover plate is hinged to the discharge end of the ash discharge auger and the cover plate can cover the end face of the discharge port of the ash discharge auger under the action of its own weight, thereby covering the discharge port of the ash discharge auger; a cooling system for cooling the ash discharge auger is provided on the ash discharge auger.
[0017] The beneficial effects of the utility model are as follows: ① In the material feeding device, triple sealing is achieved through the cooperation of the first feed hopper, the gate valve and the second feed hopper, as well as the cooperation of the second feed hopper, the first auger and the third feed hopper, as well as the cooperation of the third feed hopper, the second auger and the material feed port, so as to effectively block the air from entering the furnace body along with the material feeding, thereby ensuring that the proportion of each type of gas can be accurately controlled in the subsequent process of inputting different proportions of air, oxygen and steam into the furnace, thereby improving the quality and output of the synthesis gas; ② The synthesis gas produced in the furnace body is indirectly heat exchanged with the gas input into the furnace, which can not only reduce the temperature of the synthesis gas, but also use the heat of the synthesis gas to heat the gas input into the furnace, thereby saving energy consumption; ③ The synthesis gas generated in the furnace body can be provided to the manufacturer of green methanol as a raw material, or it can be matched with a generator set to generate electricity. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of a tubular gasifier described in the utility model.
[0019] Figure 2 yes Figure 1 A schematic diagram of a partially enlarged cross-sectional structure.
[0020] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure of part A.
[0021] Figure 4 It is a partial enlarged structural schematic diagram of the ash discharge device.
[0022] Figure 5 yes Figure 1 Schematic diagram of the local structure from a top-down perspective.
[0023] Figure 6 yes Figure 5 Schematic diagram of the structure looking upward.
[0024] Among them: 1. furnace body; 11. front end cap; 12. rear end cap; 13. material feed port; 14. ignition port; 15. ash outlet; 16. gas inlet; 17. synthesis gas outlet; 2. spiral shaft; 21. spiral blade; 31. first feed hopper; 32. second feed hopper; 33. third feed hopper; 34. conveyor; 35. first auger; 36. second auger; 37. gate valve; 4. ash discharge device; 41. ash discharge hopper; 42. ash discharge auger; 43. tail cover; 44. cover plate; 5. nozzle box; 51. partition; 52. Upper cavity; 53. Lower cavity; 54. Vertical through hole; 55. Nozzle; 56. Jet hole; 57. Concrete layer; 58. Steam intake nozzle box; 59. Other gas intake nozzle box; 6. Main pipeline; 61. Steam pipeline; 62. First valve; 63. Gas pipeline; 64. Second valve; 7. Heat exchanger; 81. Air supply pipeline; 82. Blower; 83. First gas delivery pipeline; 84. Second gas delivery pipeline; 85. Draft fan; 9. Observation hole; 91. First thermocouple; 92. Manhole. DETAILED DESCRIPTION
[0025] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0026] A tubular gasifier described in this embodiment, such as Figure 1 , Figure 2 and Figure 6 As shown, it comprises: a furnace body 1 which is horizontally fixedly installed on a plurality of bases 10 in the front-to-back direction, the furnace body 1 is a tubular structure, the front end opening of the furnace body 1 is fixedly sealed and covered by a front head 11, and the rear end opening of the furnace body 1 is fixedly sealed and covered by a rear head 12, so that the inner cavity of the entire furnace body 1 forms a closed sealed space. A spiral shaft 2 is arranged in the inner cavity of the furnace body 1, the front end of the spiral shaft 2 is sealed and passed through the through hole on the front head 11 and then supported and arranged on the front head 11 by a front bearing group, the rear end of the spiral shaft 2 is sealed and passed through the through hole on the rear head 12 and then supported and arranged on the rear head 12 by a rear bearing group, the spiral shaft 2 is driven to rotate around its own axis by a main driving device located outside the furnace body 1, wherein the main driving device can adopt a motor plus chain transmission mode, a sprocket is fixedly arranged on the motor shaft of the motor and the end of the spiral shaft 2 extending outside the furnace body 1, respectively, and the chain is wound around the two sprockets to form a chain drive. In addition, the main drive device may also adopt other forms, which is not restricted and can be designed and selected according to actual needs and actual environment.
[0027] In this embodiment, a material feed port 13 communicating with the inner cavity of the furnace body 1 is provided at the top of the front section of the furnace body 1, and a material feed device is provided on the material feed port 13. Figure 1 and Figure 5As shown, the material feeding device in this embodiment includes: a first feed hopper 31, a second feed hopper 32, a third feed hopper 33, a conveyor 34, a first auger 35, a second auger 36 and a gate valve 37. The discharge end of the conveyor 34 is fixedly installed at the side feed port of the first feed hopper 31, and the feed end of the conveyor 34 is placed on the ground of the production plant or on the base where the entire equipment is located. The conveyor 34 is in an inclined upward conveying mode. The bottom discharge port of the first feed hopper 31 and the top feed port of the second feed hopper 32 are sealed and connected through the gate valve 37, the bottom discharge port of the second feed hopper 32 is sealed and connected to the feed port of the first auger 35, the discharge port of the first auger 35 is sealed and connected to the side feed port of the third feed hopper 33, the bottom discharge port of the third feed hopper 33 is sealed and connected to the feed port of the second auger 36, and the discharge port of the second auger 36 is sealed and connected to the material feed port 13 of the furnace body 1. When the material feeding device is in the shutdown state, the gate valve 37 is closed, and the first feed hopper 31 and the second feed hopper 33 are sealed and separated by the gate valve 37 to ensure that air does not enter the second feed hopper 33 through the first feed hopper 31. During the normal operation of the gasifier, the first auger 35 and the second auger 36 can isolate the air to a large extent. The air contains nitrogen, and nitrogen is not required when the synthesis gas is used as the methanol raw material. Therefore, the triple protection can ensure that during the biomass feeding process, as little air as possible is brought into the furnace body, and this part of air is very small and will not affect the precise control of the subsequent gas, and can be ignored.
[0028] In this embodiment, Figure 1 As shown, an ignition port 14 connected to the inner cavity of the furnace body 1 is provided at the front section of the furnace body 1. Before the furnace body starts to operate, combustibles are added through the ignition port 14 and ignited. Here, the combustibles can directly use biomass raw materials for gasification. When the temperature in the furnace is raised to 800°C, the biomass raw materials in the furnace body begin to gasify normally.
[0029] In this embodiment, Figure 1 and Figure 4As shown, an ash outlet 15 connected to the inner cavity of the furnace body 1 is provided at the bottom of the rear section of the furnace body 1, and an ash outlet device 4 is provided at the ash outlet 15; the ash outlet device 4 comprises: an ash outlet hopper 41, an ash outlet auger 42, and a rear cover 43; the top feed port of the ash outlet hopper 41 is sealed and connected to the ash outlet 15 of the furnace body; the bottom discharge port of the ash outlet hopper 41 is sealed and connected to the feed port of the ash outlet auger 42; the discharge port of the ash outlet auger 42 is sealed through The through hole of the side wall of the tail cover 43 extends into the tail cover 43, the end face of the discharge port of the ash auger 42 is an inclined face, the top of the cover plate 44 is hinged to the discharge end of the ash auger 42, and the cover plate 44 can cover the end face of the discharge port of the ash auger 42 under its own weight, covering the discharge port of the ash auger 42. When the ash auger 42 delivers the gasified ash, the ash will push the cover plate 44 to rotate and open, so that the ash falls out of the ash auger 42. The bottom of the tail cover 44 is an open mouth 45, which is the discharge port of the tail cover 44.
[0030] In this embodiment, in order to reduce the temperature of the ash after biomass gasification output from the ash discharge device, a cooling system for cooling the ash discharge auger 42 is provided on the ash discharge auger 42. The cooling system can adopt scheme one: the shell of the ash discharge auger 42 is set as a jacketed shell, and the refrigerant inlet and refrigerant outlet of the jacketed shell are connected to the external water cooling pipeline system, and the cooling medium is provided to the jacketed shell through the external water cooling pipeline system. The cooling system can also adopt scheme two: the auger shaft of the ash discharge auger 42 is designed as a hollow hollow shaft, and the hollow channel of the hollow shaft can be connected to the external water cooling pipeline system through a rotary joint, and the refrigerant medium is provided to the hollow shaft through the external water cooling pipeline system. The cooling system can also adopt a combination of the above schemes one and two, and the specific form can be selected according to actual needs. The refrigerant medium is usually water at room temperature.
[0031] In this embodiment, Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a plurality of gas inlets 16 connected to the inner cavity of the furnace body 1 are spaced apart from front to back at the bottom of the furnace body 1, and a nozzle box 5 is sealed and connected to each gas inlet 16. A partition 51 is provided in the nozzle box 5, and the partition 51 separates the inner cavity of the nozzle box 5 into an upper cavity 52 and a lower cavity 53. A plurality of vertical through holes 54 are provided on the partition 51, and each nozzle 55 located above the partition 5 is vertically placed and the air inlet of each nozzle 55 is sealed and connected to the corresponding vertical through hole 54, and a concrete layer 57 is provided in the upper cavity 52 to bury the portion below the jet hole 56 of each nozzle 55.
[0032] At least one nozzle box 5 is selected as a steam intake nozzle box 58, and the remaining nozzle boxes 5 are selected as other gas intake nozzle boxes 59, and the number of other gas intake nozzle boxes 59 is not zero, and each steam intake nozzle box 58 and each other gas intake nozzle box 59 are arranged in multiple points. Two steam inlets connected to the lower cavity of the corresponding steam intake nozzle box 58 are provided on each steam intake nozzle box 58, and each steam inlet is sealed with a steam pipe 61, and each steam pipe 61 is provided with a first valve 62. A gas inlet connected to the lower cavity 53 of the corresponding other gas intake nozzle box is provided on each other gas intake nozzle box 59, and each gas inlet is sealed with a gas pipe 63, and each gas pipe 63 is provided with a second valve 64. The other end of each gas pipeline 63 and the other end of each steam pipeline 61 are sealed and connected to the main pipeline 6. The air inlet of the main pipeline 6 is sealed and connected to the outlet of the gas heat exchange pipeline of the heat exchanger 7. The inlet of the gas heat exchange pipeline of the heat exchanger 7 is sealed and connected to the blowing port of the blower 82 through the air supply pipeline 81. During the gasification process, the required gas is delivered into the inner cavity of the furnace body 1 through the blower 82. A synthesis gas outlet 17 connected to the inner cavity of the furnace body is provided at the top of the rear section of the furnace body 1. The synthesis gas outlet 17 is connected to the inlet of the synthesis gas heat exchange pipeline of the heat exchanger 7 through the first gas delivery pipeline 83. The outlet of the synthesis gas heat exchange pipeline of the heat exchanger 7 is sealed and connected to the air intake of the induced draft fan 85 through the second gas delivery pipeline 84. The induced draft fan 85 is used to extract the synthesis gas from the furnace body 1. Although the synthesis gas enters the induced draft fan 85 after heat exchange in the heat exchanger 7, the temperature of the synthesis gas after heat exchange is still relatively high. Therefore, the induced draft fan 85 adopts an induced draft fan with a cooling system, which can be directly purchased. A sampling tube is provided on the second gas delivery pipeline 84, and a third valve is provided on the sampling tube.
[0033] The temperature in the inner cavity of the furnace body 1 is very high during the biomass gasification process, usually above 800°C, because only the tar gasified at high temperature will not be reduced after subsequent cooling, and the screw shaft 2 is usually made of metal material. To increase the service life of the screw shaft 2, a refractory clay layer is provided on the shaft of the screw shaft 2 and on the spiral blades 21 of the screw shaft 2 to protect the screw shaft 2.
[0034] In addition, on the basis of wrapping the refractory mud layer, the axis of the spiral shaft 2 can also be set as a hollow axis with a cooling water channel, the water inlet end of the cooling water channel is sealed and connected to the water inlet pipe through a first rotary joint, and the water outlet end of the cooling water channel is sealed and connected to the water outlet pipe through a second rotary joint. Here, the water inlet pipe and the water outlet pipe can share the same cooling system with the cooling system at the ash discharge device, for example, forming a cold medium circulation system, which belongs to mature technology, so it will not be described in detail here.
[0035] Since steam is used in the least amount in the entire gasification process, while air and oxygen are used in relatively large amounts, the diameters of the gas pipeline 63 and the steam pipeline 61 are limited, so that the diameter of the gas pipeline 63 is 135 to 165 cm, and the diameter of the steam pipeline 61 is 20 to 30 cm. The diameter of the gas pipeline 63 is preferably 150 cm, and the diameter of the steam pipeline 61 is preferably 25 cm.
[0036] In this embodiment, a plurality of observation holes 9 connected to the inner cavity of the furnace body 1 are arranged at intervals from front to back on the furnace body 1, and a sight glass is installed on each observation hole 9; a plurality of first thermocouples 91 for measuring the temperature in the inner cavity of the furnace body 1 at corresponding positions are arranged at intervals from front to back on the furnace body 1, and a second thermocouple for measuring the temperature of the gas flowing through the main pipeline 6 is arranged on the main pipeline 6; a plurality of manholes 92 connected to the inner cavity of the furnace body 1 are arranged at intervals from front to back on the furnace body 1, and each manhole 92 is covered with a cover.
[0037] The above-mentioned tubular gasifier has the following advantages: First, in the material feeding device, triple sealing is achieved through the cooperation of the first feed hopper 31, the gate valve 37 and the second feed hopper 32, as well as the cooperation of the second feed hopper 32, the first auger 35 and the third feed hopper 32, as well as the cooperation of the third feed hopper 33, the second auger 36 and the material feed port 13, which effectively blocks the air from entering the furnace body along with the material feeding, and ensures that the proportion of each type of gas can be accurately controlled in the subsequent process of inputting different proportions of air, oxygen and steam into the furnace, thereby improving the quality and output of the synthesis gas; Second, the synthesis gas produced in the furnace body is indirectly heat exchanged with the gas input into the furnace, which can not only reduce the temperature of the synthesis gas, but also use the heat of the synthesis gas to heat the gas input into the furnace, thereby saving energy consumption; Third, the synthesis gas generated in the furnace body can be provided to the manufacturer of green methanol as raw material, and can also be matched with a generator set to generate electricity.
[0038] The above description is only a preferred embodiment of the present invention and does not constitute any other limitation on the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.
Claims
1. A tubular gasifier, comprising: The furnace body is horizontally fixedly installed on several bases in the front-to-back direction, and the furnace body is a tubular structure, the front end opening of the furnace body is fixedly sealed and covered by the front head, and the rear end opening of the furnace body is fixedly sealed and covered by the rear head; it is characterized in that: a spiral shaft is arranged in the inner cavity of the furnace body, the front end seal of the spiral shaft passes through the through hole on the front head and is supported and arranged on the front head by the front bearing group, the rear end seal of the spiral shaft passes through the through hole on the rear head and is supported and arranged on the rear head by the rear bearing group, and the spiral shaft is driven to rotate by a main driving device located outside the furnace body; a material feeding port connected to the inner cavity of the furnace body is opened at the top of the front section of the furnace body, and a material feeding device is arranged on the material feeding port; an ignition port connected to the inner cavity of the furnace body is opened at the front section of the furnace body, and the door is installed at the ignition port through a detachable structure or a hinge; an ash outlet connected to the inner cavity of the furnace body is opened at the bottom of the rear section of the furnace body, and an ash outlet device is arranged at the ash outlet; A plurality of gas inlets connected to the inner cavity of the furnace body are arranged at intervals from front to back at the bottom of the furnace body, and a nozzle box is sealed and connected to each gas inlet. A partition is arranged in the nozzle box, and the partition separates the inner cavity of the nozzle box from top to bottom to form an upper cavity and a lower cavity. A plurality of vertical through holes are arranged on the partition, and each nozzle located above the partition is vertically placed and the air inlet of each nozzle is sealed and connected to the corresponding vertical through holes respectively. A concrete layer is arranged in the upper cavity to bury the part below the jet hole of each nozzle; at least one nozzle box is selected as a steam inlet nozzle box, and the remaining nozzle boxes are selected as other gas inlet nozzle boxes, and the number of other gas inlet nozzle boxes is not zero, and two steam inlets connected to the lower cavity of the corresponding steam inlet nozzle box are arranged on each steam inlet nozzle box, and each steam inlet is sealed and connected to a steam pipe, A first valve is provided on each steam pipe; a gas inlet connected to the lower cavity of the corresponding other gas inlet nozzle box is provided on each other gas inlet nozzle box, a gas pipe is sealed and connected to each gas inlet, and a second valve is provided on each gas pipe; the other end of each gas pipe and the other end of each steam pipe are sealed and connected to the main pipe, the air inlet of the main pipe is sealed and connected to the outlet of the gas heat exchange pipe of the heat exchanger, and the inlet of the gas heat exchange pipe of the heat exchanger is sealed and connected to the blowing port of the blower through the air supply pipe; a synthesis gas outlet connected to the inner cavity of the furnace body is provided on the top of the rear section of the furnace body, the synthesis gas outlet is connected to the inlet of the synthesis gas heat exchange pipe of the heat exchanger through the first gas delivery pipe, and the outlet of the synthesis gas heat exchange pipe of the heat exchanger is sealed and connected to the air intake of the induced draft fan through the second gas delivery pipe.
2. A tubular gasifier according to claim 1, characterized in that: A refractory clay layer is provided on the shaft of the screw shaft and on the spiral blades of the screw shaft.
3. A tubular gasifier according to claim 1 or 2, characterized in that: The shaft of the spiral shaft is a hollow shaft with a cooling water channel. The water inlet end of the cooling water channel is sealed and connected to the water inlet pipe through a first rotating joint, and the water outlet end of the cooling water channel is sealed and connected to the water outlet pipe through a second rotating joint.
4. The tubular gasifier according to claim 1, characterized in that: The diameter of the gas pipeline is 135 to 165 cm, and the diameter of the steam pipeline is 20 to 30 cm.
5. A tubular gasifier according to claim 4, characterized in that: The diameter of the gas pipeline is 150 cm, and the diameter of the steam pipeline is 25 cm.
6. The tubular gasifier according to claim 1, characterized in that: A plurality of observation holes connected to the inner cavity of the furnace body are arranged at intervals from front to back on the furnace body, and a sight glass is installed on each observation hole; a plurality of first thermocouples for measuring the temperature in the inner cavity of the furnace body at corresponding positions are arranged at intervals from front to back on the furnace body, and a second thermocouple for measuring the temperature of the gas flowing through the main pipeline is arranged on the main pipeline; a plurality of manholes connected to the inner cavity of the furnace body are arranged at intervals from front to back on the furnace body, and each manhole is covered with a cover.
7. The tubular gasifier according to claim 1, characterized in that: A sampling tube is arranged on the second gas delivery pipeline, and a third valve is arranged on the sampling tube.
8. The tubular gasifier according to claim 1, characterized in that: The material feeding device includes: a first feed hopper, a second feed hopper, a third feed hopper, a conveyor, a first auger, a second auger and a gate valve. The discharge end of the conveyor is fixedly installed at the side feed port of the first feed hopper. The bottom discharge port of the first feed hopper and the top feed port of the second feed hopper are sealed and connected via a gate valve. The first auger receives the sealed material conveyance from the bottom discharge port of the second feed hopper to the side feed port of the third feed hopper. The second auger receives the sealed material conveyance from the bottom discharge port of the third feed hopper to the material feed port of the furnace body.
9. A tubular gasifier according to claim 1 or 8, characterized in that: The ash discharging device includes: an ash hopper, an ash discharging auger, and a tail cover shell. The top feed port of the ash discharging hopper is sealed and connected to the ash discharge port of the furnace body, and the bottom discharge port of the ash discharging hopper is sealed and connected to the feed port of the ash discharging auger. The discharge port of the ash discharging auger seals and extends into the tail cover shell after passing through the through hole of the side wall of the tail cover shell. The end face of the discharge port of the ash discharging auger is an inclined face. The top of the cover plate is hinged to the discharge end of the ash discharging auger and the cover plate can cover the end face of the discharge port of the ash discharging auger under the action of its own weight, thereby covering the discharge port of the ash discharging auger. A cooling system for cooling the ash discharging auger is provided on the ash discharging auger.