Biomass-to-syngas production line

Abstract

The utility model discloses a kind of biomass preparation synthesis gas production line, comprising: steam boiler, steam heater and gasification reactor;Steam heater has high-temperature gas heat exchange passage and steam heat exchange passage;Gasification reactor includes the reaction furnace of hollow interlayer formed by inner, outer furnace body, and the gas inlet and outlet pipe that is communicated with hollow interlayer is provided on outer furnace body;Feeding auger, synthesis gas conveying pipeline, ash outlet are provided on inner furnace body and communicated with the furnace cavity of inner furnace body;Fireproof cement casting partition with ash outlet channel and a plurality of installation channels is provided in the furnace cavity of furnace body, each installation channel is correspondingly provided with hood structure, and the air inlet of each hood structure bottom is connected with steam inlet pipe arranged on reaction furnace by annular pipeline;Steam boiler supplies steam for steam heater, and steam heater supplies steam for gasification reactor.The above production line can make biomass raw material or biochar fully gasification reaction under 800 DEG C high-temperature steam.

Description

Technical Field

[0001] This utility model relates to the field of steam gasification technology, and in particular to a biomass-to-syngas production line. Background Technology

[0002] Biomass refers to the general term for various organic substances formed directly or indirectly through photosynthesis. It has advantages such as renewability, abundant reserves, low pollution, and storability. It is the fourth largest energy source after coal, oil, and natural gas, and is also an ideal renewable energy source.

[0003] Steam gasification technology is an important technology for utilizing biomass. It uses high-temperature steam as a gasifying agent to gasify biomass raw materials, ultimately converting them into hydrogen-rich syngas.

[0004] The steam gasification technology has been transformed into a biomass-to-syngas production line. The most critical components of this production line are the gasification reactor and the supply of high-temperature steam.

[0005] In common gasification reactors, biomass feedstock is added from the top, while the gasifying agent (high-temperature steam above 800℃) is added from the bottom. The steam flow direction is opposite to the biomass feedstock flow direction; the downward-flowing biomass feedstock is dried, pyrolyzed, and gasified by the upward-flowing steam. However, during the gasification process, because the rising steam cannot achieve uniform diffusion, some biomass feedstock fails to fully contact the steam, resulting in incomplete gasification. This leads to problems such as high residue levels, tar production, limited gasification efficiency, and other limitations.

[0006] For the supply of high-temperature steam, the temperature of the high-temperature steam introduced into the gasification reactor needs to be maintained above 800℃ during the gasification reaction process. However, the steam boilers commonly available on the market, although low in operating cost, can only produce steam with a maximum temperature of about 150℃, which cannot meet the temperature requirements of the high-temperature steam required by the gasification reactor. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a biomass syngas production line that enables biomass raw materials or biochar to undergo a full gasification reaction under high-temperature steam above 800°C to generate syngas. This production line has the advantages of high gasification efficiency, virtually no tar residue, and virtually no carbon residue. The syngas produced by this production line mainly consists of CO and H2, with a small amount of CO2. Among them, hydrogen accounts for about 60%, which can be used to produce green methanol, hydrogen, etc. In particular, it can be directly synthesized when synthesizing green methanol without the need to add other substances.

[0008] To address the problems of low gasification efficiency, large residue, and difficulty in obtaining high-temperature steam required for gasification reactions in existing gasification reactors, the technical solution adopted in this utility model is as follows: the biomass syngas production line includes a steam boiler, a steam heater, and a gasification reactor; wherein the steam boiler and the steam heater are combined to provide high-temperature steam at a temperature above 800°C.

[0009] The steam heater has two heat exchange channels: a high-temperature gas heat exchange channel and a steam heat exchange channel. The positions of the high-temperature gas heat exchange channel and the steam heat exchange channel are arranged so that the steam entering the steam heat exchange channel can indirectly exchange heat with the high-temperature gas entering the high-temperature gas heat exchange channel.

[0010] The structure of the gasification reactor includes: a reactor consisting of an inner furnace body and an outer furnace body, with a closed hollow interlayer formed between the inner furnace body and the outer furnace body; an outlet pipe communicating with the hollow interlayer is provided on the outer wall of the top of the outer furnace body; and an inlet pipe communicating with the hollow interlayer is provided on the outer wall of the bottom of the outer furnace body.

[0011] A feeding auger communicating with the furnace cavity of the inner furnace body is provided on the outer side wall of the top of the inner furnace body; a syngas conveying pipe communicating with the furnace cavity of the inner furnace body is provided on the top of the inner furnace body; the bottom of the inner furnace body has an open opening communicating with the furnace cavity of the inland furnace, and an ash hopper is sealed and installed at the open opening, and an ash discharge valve is installed at the ash discharge port of the ash discharge hopper.

[0012] A refractory cement casting partition is provided in the lower section of the furnace cavity of the inner furnace body, which divides the furnace cavity of the inner furnace body into two chambers: a gasification reaction chamber and a partition chamber; an ash discharge channel that runs vertically through the middle of the refractory cement casting partition is provided; several vertically through installation channels are evenly spaced on the refractory cement casting partition, and a wind cap structure is provided in each installation channel, with each air outlet on the wind cap structure extending above the corresponding installation channel;

[0013] An annular pipeline is provided in the partition chamber. A first connection hole and several second connection holes are provided in the annular pipeline. A steam inlet pipe is sealed and connected to the first connection hole. The steam inlet pipe passes through the through hole on the reactor and extends out of the reactor. Each second connection hole corresponds to and matches the air inlet hole at the bottom of each wind cap structure. The air inlet hole at the bottom of each wind cap structure is sealed and connected to the corresponding second connection hole.

[0014] The reactor is wrapped with a refractory layer, and the outlet of the gas outlet pipe, the inlet of the gas inlet pipe, the inlet of the steam inlet pipe, and the feed inlet of the feed auger are all located outside the refractory layer.

[0015] High-temperature steam (around 800℃) enters each wind cap structure through the steam inlet pipe and the annular pipe, and then enters the gasification reaction chamber through the air outlets on each wind cap structure. The wind cap structure is designed to allow the high-temperature steam to be more evenly distributed in the gasification reaction chamber, so that the material entering the gasification reaction chamber can fully contact the high-temperature steam to undergo a gasification reaction, thereby improving the gasification reaction efficiency. The hollow jacket auxiliary heating further improves the gasification reaction efficiency.

[0016] Materials such as biomass raw materials and biochar produced from biomass raw materials enter the furnace cavity of the inner furnace body through the feeding auger, and come into contact with high-temperature steam entering the gasification reaction chamber through the air outlets on each wind cap structure. The material flows from top to bottom, while the high-temperature steam flows from bottom to top. The ash after the gasification reaction falls downward through the ash outlet channel, while the syngas after the gasification reaction rises and is output outside the reactor through the syngas conveying pipeline.

[0017] The steam outlet of the steam boiler is connected to the steam inlet of the steam heat exchange channel in the steam heater via a first connecting pipe. The steam outlet of the steam heat exchange channel in the steam heater is connected to the steam inlet pipe of the gasification reactor via a second connecting pipe. During operation, the steam produced by the steam boiler at approximately 150°C enters the steam heat exchange channel in the steam heater via the first connecting pipe. High-temperature gas (typically around 1000°C) is then introduced into the high-temperature gas heat exchange channel of the steam heater. The high-temperature gas releases heat to the steam in the steam heat exchange channel, thereby raising the temperature of the steam in the steam heat exchange channel to over 800°C.

[0018] Traditional steam boilers rely on burning coal to obtain heat. This solution takes into account economic and environmental issues and uses biomass raw materials. Whether it is the steam boiler, the high-temperature gas in the high-temperature gas heat exchange channel in the steam heater, or the high-temperature gas in the hollow jacket in the gasification reactor, the raw materials are all biomass raw materials. The specific solution is to set up a biomass carbonization furnace, a first biomass gasification furnace and a second biomass gasification furnace.

[0019] The biochar outlet of the biomass carbonization furnace is equipped with a front auger, and the discharge port of the front auger is connected to the inlet of the feed auger. Using biochar as the gasification feedstock has advantages over using biomass feedstock, and can better ensure that there are no residues in the process of generating syngas through gasification reaction.

[0020] The combustible gas outlet of the first biomass gasifier is connected to the fuel supply inlet of the steam boiler through a third connecting pipeline; the biomass raw material is gasified in the first biomass gasifier to produce combustible gas, and the generated combustible gas is fed into the steam boiler for use as fuel.

[0021] A combustion chamber is provided at the gas inlet of the high-temperature gas heat exchange channel in the steam heater. The combustible gas outlet of the second biomass gasifier is connected to the first burner located on the combustion chamber via a fourth connecting pipe. Biomass raw materials are gasified in the second biomass gasifier to produce combustible gas. The generated combustible gas is fed into the first burner for combustion to produce high-temperature flue gas. The high-temperature flue gas is then introduced into the high-temperature gas heat exchange channel to indirectly exchange heat with the steam introduced into the steam heater, thereby increasing the steam temperature.

[0022] The syngas delivery pipeline of the gasification reactor is connected to a syngas supply pipeline and a fifth connecting pipeline. The fifth connecting pipeline is connected to a second burner in the inlet pipe of the gasification reactor. The syngas supply pipeline is connected to the inlet of the water washing device. A small portion of the syngas produced by the gasification reactor is introduced into the second burner through the fifth connecting pipeline to generate high-temperature flue gas. This high-temperature flue gas is then introduced into the hollow jacket of the gasification reactor for auxiliary heating. Typically, a valve is installed on the fifth connecting pipeline to control the amount of syngas supplied to the second burner.

[0023] For steam heaters that can raise the temperature of steam from 150℃ to 800℃, the steam heaters currently on the market with this function consume a lot of energy and are not economical to use unless cost is disregarded. However, for manufacturing enterprises, economic issues need to be considered. Therefore, this solution designs a steam heater with the following structure: the structure of the steam heater includes a heating furnace body, and the furnace cavity of the heating furnace body is divided into several cavity units from left to right.

[0024] The structure within each cavity unit is as follows: A first partition plate and a second partition plate are spaced apart from top to bottom within the cavity unit, dividing it into an upper cavity, a middle cavity, and a lower cavity. A third partition plate is provided in the upper cavity, dividing it into a first cavity and a second cavity from left to right. A first connection port communicating with the first cavity is provided at the top of the heating furnace body, and the first cavity is connected to the lower cavity via several first heat exchange tubes located in the middle cavity. A second connection port communicating with the second cavity is provided at the top of the heating furnace body, and the second cavity is connected to the lower cavity via several second heat exchange tubes located in the middle cavity.

[0025] The first connection port in each cavity unit is connected to the second connection port in the cavity unit located to the left of the cavity unit via a steam connection pipe;

[0026] Each first cavity, each second cavity, each steam connecting pipe, each first heat exchange pipe, each second heat exchange pipe, and each lower cavity constitute a steam heat exchange channel that allows steam to flow in a serpentine path; the first connection port in the cavity unit located at the leftmost end is the steam outlet of the steam heat exchange channel, and the second connection port in the cavity unit located at the rightmost end is the steam inlet of the steam heat exchange channel.

[0027] Each cavity unit has a central cavity that extends from left to right, allowing all the central cavities in all cavity units to connect and form a high-temperature gas heat exchange channel for the passage of high-temperature gas. An air inlet connected to the high-temperature gas heat exchange channel is provided at the left end of the heating furnace body, and the air inlet is the gas inlet of the high-temperature gas heat exchange channel. An air outlet connected to the high-temperature gas heat exchange channel is provided at the right end of the heating furnace body, and the air outlet is the gas outlet of the high-temperature gas heat exchange channel.

[0028] The flow direction of the high-temperature gas in the steam heater is as follows: the high-temperature gas enters the high-temperature gas heat exchange channel from the gas inlet and flows from left to right. During the flow of the high-temperature gas, it indirectly exchanges heat with the steam in each of the first heat exchange tubes and each of the second heat exchange tubes. After releasing heat, it flows out from the gas outlet.

[0029] The steam flow direction in the steam heater is as follows: Steam enters the heating furnace body through the steam inlet, first entering the rightmost cavity unit, then flowing sequentially through the second cavity, each second heat exchange tube, the lower cavity, each first heat exchange tube, and the first cavity in the rightmost cavity unit, before flowing to the left into the adjacent cavity unit. After flowing through the second cavity, each second heat exchange tube, the lower cavity, each first heat exchange tube, and the first cavity in that cavity unit, it continues to flow to the left in the same serpentine direction, and finally flows out from the steam outlet. During the steam flow, the steam flowing through each first heat exchange tube and each second heat exchange tube undergoes indirect heat exchange with the high-temperature gas in the high-temperature gas heat exchange channel outside the tube, absorbing heat.

[0030] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is as follows: the furnace cavity of the heating furnace body is rectangular; the first connection port corresponding to each cavity unit is connected to the first cavity of the cavity unit through a frustum-shaped first connecting pipe; the second connection port corresponding to each cavity unit is connected to the second cavity of the cavity unit through a frustum-shaped second connecting pipe; the gas inlet of the high-temperature gas heat exchange channel is connected to the middle cavity of the leftmost cavity unit through a frustum-shaped third connecting pipe; the gas outlet of the high-temperature gas heat exchange channel is connected to the middle cavity of the rightmost cavity unit through a frustum-shaped fourth connecting pipe.

[0031] The third partition plate in each cavity unit evenly divides the upper cavity of the cavity unit, so that the space of the first cavity and the space of the second cavity in the cavity unit are the same size.

[0032] The positional relationship of the first partition plate, the second partition plate, the third partition plate, each first heat exchange tube, and each second heat exchange tube in each cavity unit is as follows: the first partition plate and the second partition plate are arranged horizontally; the third partition plate is perpendicular to the first partition plate; the axis of each first heat exchange tube is perpendicular to the first partition plate, and the axis of each second heat exchange tube is perpendicular to the first partition plate.

[0033] The first heat exchange tubes in each cavity unit are evenly spaced, and the second heat exchange tubes in each cavity unit are evenly spaced. The number of first heat exchange tubes in each cavity unit is the same as the number of second heat exchange tubes.

[0034] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment includes a heat exchanger and an induced draft fan, wherein the gas outlet of the high-temperature gas heat exchange channel is connected sequentially to the air inlet of the heat exchanger and the induced draft fan via a right-side flue gas pipe.

[0035] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is that a number of spiral blades are arranged in the hollow jacket of the gasification reactor, and each spiral blade is evenly spaced along a spiral trajectory that spirals upward from bottom to top. This arrangement can increase the path of high-temperature gas, improve heat exchange efficiency, and further ensure gasification efficiency.

[0036] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is as follows: the top of the inner furnace body in the gasification reactor protrudes upwards from the outer furnace body, and the portion of the inner furnace body protruding from the outer furnace body is a frustum-shaped section; the syngas delivery pipeline is located on the top surface of the frustum section; and the feed auger is located on the side wall of the frustum section.

[0037] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is as follows: a cooling pipe is provided in the inner cavity of the ash hopper in the gasification reactor. The inlet end of the cooling pipe passes through the first connecting through hole on the ash hopper and the second connecting through hole on the refractory layer covering the ash hopper, and then extends out of the refractory layer covering the ash hopper. The outlet end of the cooling pipe passes through the third connecting through hole on the ash hopper and the fourth connecting through hole on the refractory layer covering the ash hopper, and then extends out of the refractory layer covering the ash hopper.

[0038] The ash discharge valve consists of a first valve, a second valve, and a transition section connecting the outlet of the first valve and the inlet of the second valve.

[0039] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is as follows: the refractory layer surrounding the frustum section is a first refractory layer cast from refractory cement; the refractory layer surrounding the outer furnace body is a refractory brick layer, with a metal shell containing several claw studs covering the refractory brick layer; and the refractory layer surrounding the ash hopper is a second refractory layer cast from refractory cement.

[0040] Furthermore, in the aforementioned biomass-to-syngas production line, a more preferred embodiment is that: a level gauge is installed on the reactor in the gasification reactor to measure the material level in the furnace cavity entering the inner furnace body; and a temperature sensor is installed on the reactor to measure the temperature in the furnace cavity of the inner furnace body.

[0041] The beneficial effects of this utility model are: ① The steam heater in the biomass syngas production line has the advantages of simple and compact structure, simple operation, low energy consumption and economic and environmental protection, and can efficiently and economically produce high-temperature steam at a temperature above 800℃; the gasification reactor in the biomass syngas production line has the advantages of high gasification efficiency, virtually no tar residue, and virtually no residual carbon residue; the syngas produced by the gasification reactor can be directly synthesized into green methanol without the addition of other substances, and can also be used to produce hydrogen; ② The fuel source of the steam boiler and the fuel source of the high-temperature flue gas in the steam heater are both from the combustible gas produced by the gasification of the biomass gasification furnace, the fuel source of the high-temperature flue gas in the gasification reactor is from part of the syngas in the gasification reaction, and the raw material in the gasification reactor is from the biochar produced by the carbonization of the biomass carbonization furnace. The entire production line uses green and environmentally friendly biomass raw materials, which is economical, environmentally friendly and energy-efficient. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the biomass-to-syngas production line described in this utility model.

[0043] Figure 2 This is a schematic diagram of a steam heater.

[0044] Figure 3 yes Figure 2 A partial structural diagram.

[0045] Figure 4 yes Figure 2 A schematic diagram of the structure from a top-down view.

[0046] Figure 5 yes Figure 4 A schematic diagram of the internal partial structure.

[0047] Figure 6 yes Figure 5 A partial structural diagram.

[0048] Figure 7This is a schematic diagram of the gasification reactor.

[0049] Figure 8 yes Figure 7 A partial structural diagram.

[0050] Figure 9 yes Figure 8 A top-view structural diagram of the medium refractory cement casting interlayer.

[0051] in:

[0052] 100. Biomass carbonization furnace; 200. Discharge auger; 300. Feed auger; 400. Gasification reactor; 500. Steam heater; 600. Combustion chamber; 700. Second biomass gasification furnace; 800. Steam boiler; 900. First biomass gasification furnace; 1000. Water cooling device;

[0053] 1. Heating furnace body; 10. Cavity unit; 101. First cavity; 102. Second cavity; 103. Middle cavity; 104. Lower cavity; 105. First connection port; 106. Second connection port; 107. First connecting pipe; 108. Second connecting pipe; 11. Third connecting pipe; 12. Fourth connecting pipe; 13. Steam inlet of steam heater; 14. Steam outlet of steam heater; 15. Left flue gas duct;

[0054] 2. First burner;

[0055] 31. First partition plate; 32. Second partition plate; 33. Third partition plate; 34. First heat exchange tube; 35. Second heat exchange tube; 36. Steam connection pipe;

[0056] 41. Right-side flue gas duct; 42. Heat exchanger; 43. Exhaust fan;

[0057] 51. Inner furnace body; 511. Feed inlet; 512. Syngas outlet; 513. Frustum section; 514. Gasification reaction chamber; 515. Separation chamber; 52. Outer furnace body; 521. Gas outlet; 522. Gas inlet; 53. Hollow interlayer; 54. First refractory layer; 55. Refractory brick layer; 56. Metal outer shell; 57. Ash hopper; 58. Second refractory layer;

[0058] 61. Level gauge; 62. Temperature sensor; 63. Second burner; 64. Spiral blades; 65. Inlet pipe; 66. Outlet pipe; 67. Feed auger; 68. Syngas delivery pipeline;

[0059] 71. Cooling piping; 711. Inlet end; 712. Outlet end; 72. First valve; 73. Transition section; 74. Second valve;

[0060] 81. Refractory cement casting interlayer; 811. Installation channel; 82. Vent structure; 821. Air outlet; 822. Air inlet; 823. Conical hole structure; 83. Annular pipeline; 84. Steam inlet pipe; 85. Ash discharge channel. Detailed Implementation

[0061] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0062] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0063] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0064] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] Furthermore, for ease of description, this utility model is referred to as Figure 2 The left-hand direction shown is defined as "left". Figure 2 The right-hand direction shown is defined as "right". All directional terms "left" and "right" involved in this utility model shall be based on the above definition. Example 1

[0066] The biomass-to-syngas production line described in this embodiment includes: a steam boiler 800, a steam heater 500, and a gasification reactor 400.

[0067] The steam heater 500 has two heat exchange channels: a high-temperature gas heat exchange channel and a steam heat exchange channel. The positions of the high-temperature gas heat exchange channel and the steam heat exchange channel are arranged so that the steam entering the steam heat exchange channel can indirectly exchange heat with the high-temperature gas entering the high-temperature gas heat exchange channel.

[0068] The structure of the gasification reactor 400 described in this embodiment includes: a reactor, such as... Figure 7As shown, the reactor includes an inner furnace body 51 and an outer furnace body 52, with a closed hollow interlayer 53 formed between the inner furnace body 51 and the outer furnace body 52. ​​An outlet 521 communicating with the hollow interlayer 53 is provided on the top outer wall of the outer furnace body 52, and an outlet pipe 66 is sealed and connected to the outlet 521. An inlet 522 communicating with the hollow interlayer 53 is provided on the bottom outer wall of the outer furnace body 52, and an inlet pipe 65 is sealed and connected to the inlet 522.

[0069] like Figure 1 As shown, in this embodiment, a feed inlet 511 communicating with the furnace cavity of the inner furnace body 51 is provided on the top outer wall of the inner furnace body 51. The feed inlet 511 is sealed to the outlet of the feed auger 67. A syngas outlet 512 communicating with the furnace cavity of the inner furnace body 51 is provided at the top of the inner furnace body 51. A syngas delivery pipe 68 is sealed to the syngas outlet 512. The output syngas has a high temperature, so the syngas delivery pipe 68 is connected to a water cooling device 1000. The water cooling device 1000 may include a downstream heat exchanger and a downstream dust collector. The syngas is cooled by the downstream heat exchanger and dusted by the downstream dust collector before being output. Of course, the water cooling device 1000 may also adopt other structural forms according to actual requirements.

[0070] like Figure 7 , Figure 8 and Figure 9 As shown, in this embodiment, a refractory cement casting partition 81 is provided in the lower section of the furnace cavity of the inner furnace body 51. The refractory cement casting partition 81 divides the furnace cavity of the inner furnace body 51 into two chambers: a gasification reaction chamber 514 and a partition chamber 515.

[0071] A vertically penetrating ash discharge channel 85 is provided in the middle of the refractory cement casting partition 81. Several vertically penetrating installation channels 811 are evenly spaced on the refractory cement casting partition 81. A corresponding air cap structure 82 is provided in each installation channel 811, and the air outlets 821 on the air cap structure 82 extend above the corresponding installation channel 811. The specific structure of the air cap structure 82 is as follows: the main body is a hollow tube, the top of the hollow tube is closed, several air outlets 821 are circumferentially formed on the top side wall of the hollow tube, and the bottom of the hollow tube is open, forming an air inlet 822 communicating with the hollow channel in the middle of the hollow tube. To allow the airflow to be more evenly dispersed from each air outlet 821, the top of the hollow channel is set as a conical hole structure 823.

[0072] An annular pipe 83 is provided in the partition chamber 515. A first connecting hole and several second connecting holes are provided on the annular pipe 83. A steam inlet pipe 84 is sealed and connected to the first connecting hole. The steam inlet pipe 84 passes through the through hole on the reactor and extends out of the reactor. Each second connecting hole corresponds to the position of the air inlet hole 822 at the bottom of each wind cap structure 82, and the air inlet hole 822 at the bottom of each wind cap structure 82 is sealed and connected to the corresponding second connecting hole.

[0073] like Figure 1 As shown, in this embodiment, the bottom of the inner furnace body 51 is open to form an opening, and an ash hopper 57 is sealed and installed at the opening. An ash discharge valve is installed at the ash discharge port of the ash hopper 57.

[0074] The reactor is wrapped with a refractory layer, and the inlets of the gas outlet pipe 66, gas inlet pipe 65, steam inlet pipe 84, and feed auger 67 all extend outside the refractory layer.

[0075] The boiler steam outlet of the steam boiler 800 is connected to the steam inlet of the steam heat exchange channel in the steam heater 500 through a first connecting pipe, and the steam outlet of the steam heat exchange channel in the steam heater 500 is connected to the steam inlet pipe of the gasification reactor 400 through a second connecting pipe.

[0076] The high-temperature steam entering the hollow jacket 53 of the gasification reactor 400 comes from the steam heater 500. The initial steam that needs to be heated by the steam heater 500 comes from the steam boiler 800. The steam temperature generated by the steam boiler 800 is usually around 150°C. This steam is introduced into the steam heat exchange channel in the steam heater 500. High-temperature gas (the temperature of high-temperature gas is usually around 1000°C) is introduced into the high-temperature gas heat exchange channel. Through indirect heat exchange, the temperature of the steam introduced into the steam heater 500 at around 150°C is raised to above 800°C.

[0077] High-temperature steam (above 800°C) output from the steam heater 500 enters each wind cap structure 82 through the second connecting pipe, steam inlet pipe 84, and annular pipe 83. Then, it enters the gasification reaction chamber 514 through each air outlet 821 on each wind cap structure 82. The wind cap structure 82 is set here to allow the high-temperature steam to be more evenly distributed in the gasification reaction chamber 514, so that the material entering the gasification reaction chamber 514 can fully contact the high-temperature steam to undergo a gasification reaction, thereby improving the gasification reaction efficiency. In addition, the high-temperature gas is introduced through the hollow jacket 53 to assist heating, further improving the gasification reaction efficiency.

[0078] Materials such as biomass raw materials and carbon produced from biomass raw materials enter the furnace cavity of the inner furnace body 51 through the feeding auger 67, and come into contact with the high-temperature steam that enters the gasification reaction chamber 514 through the air outlets 821 on each wind cap structure 82. The material flows from top to bottom, and the high-temperature steam flows from bottom to top. The ash after the gasification reaction falls downward through the ash outlet channel 85, while the syngas after the gasification reaction rises and is output outside the reactor through the syngas conveying pipeline 68.

[0079] Among them, the gasification reactor in the above production line has the advantages of high gasification efficiency, virtually no tar residue, and virtually no residual carbon residue; the synthesis gas produced by the gasification reactor can be directly synthesized into green methanol without the addition of other substances, and can also be used to produce hydrogen. Example 2

[0080] The biomass-to-syngas production line described in this embodiment includes: a steam boiler 800, a steam heater 500, and a gasification reactor 400.

[0081] The steam heater 500 described in this embodiment includes a heating furnace body 1, such as... Figure 2 and Figure 3 As shown, the furnace cavity of the heating furnace body 1 is divided into several independent cavity units 10 from left to right. A more preferred embodiment is that each cavity unit 10 occupies an equal amount of space. The number of cavity units 10 is usually between 4 and 6. The actual number of cavity units 10 is determined based on the size of the heating furnace body 1, the diameter and number of each first heating tube 34 and each second heating tube 35 in the cavity unit 10, the required steam temperature, etc.

[0082] The structure within each cavity unit 10 is as follows: Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a first partition plate 31 and a second partition plate 32 are arranged at intervals from top to bottom in the cavity unit 10, dividing the cavity unit 10 into an independent upper cavity, a middle cavity 103, and a lower cavity 104 from top to bottom through the first partition plate 31 and the second partition plate 32; a third partition plate 33 is arranged in the upper cavity, dividing the upper cavity from left to right into a first cavity 101 and a second cavity 102 through the third partition plate 33; a more preferred embodiment is that the space occupied by the first cavity 101 and the second cavity 102 is equal.

[0083] like Figure 3As shown, a first connection port 105 communicating with a first cavity 101 is provided at the top of the heating furnace body 1. The first cavity 101 is connected to the lower cavity 104 through a plurality of first heat exchange tubes 34 provided in the middle cavity 103. A second connection port 106 communicating with a second cavity 102 is provided at the top of the heating furnace body 1. The second cavity 102 is connected to the lower cavity 104 through a plurality of second heat exchange tubes 35 provided in the middle cavity 103.

[0084] The top ends of each first heat exchange tube 34 and each second heat exchange tube 35 are sealed and pass through their respective upper mounting holes on the first partition plate 31, thereby enabling each first heat exchange tube 34 to communicate with the first cavity 101 and each second heat exchange tube 35 to communicate with the second cavity 102. The bottom ends of each first heat exchange tube 34 and each second heat exchange tube 35 are sealed and pass through their respective lower mounting holes on the second partition plate 32, thereby enabling each first heat exchange tube 34 and each second heat exchange tube 35 to communicate with the lower cavity 104.

[0085] Each cavity unit 10's first connection port 105 is connected to the second connection port 106 of the adjacent cavity unit 10 on its left side via a steam connection pipe 36; each first cavity 101, each second cavity 102, each steam connection pipe 36, each first heat exchange pipe 34, each second heat exchange pipe 35, and each lower cavity 104 constitute a steam heat exchange channel that allows steam to flow in a serpentine path; the first connection port 105 in the leftmost cavity unit 10 is the steam outlet 14 of the steam heater, and the second connection port 106 in the rightmost cavity unit 100 is the steam inlet 13 of the steam heater, such as... Figure 2 As shown.

[0086] The central cavity 103 in each cavity unit 10 extends through both sides, so that the central cavities 103 in all cavity units 10 are connected to form a high-temperature gas heat exchange channel for gas to pass through; an air inlet communicating with the high-temperature gas heat exchange channel is provided at the left end of the heating furnace body 1, and the air inlet is the gas inlet of the high-temperature gas heat exchange channel; an air outlet communicating with the high-temperature gas heat exchange channel is provided at the right end of the heating furnace body 1, and the air outlet is the gas outlet of the high-temperature gas heat exchange channel.

[0087] The structure of the gasification reactor 400 described in this embodiment includes: a reactor, such as... Figure 7As shown, the reactor includes an inner furnace body 51 and an outer furnace body 52, with a closed hollow interlayer 53 formed between the inner furnace body 51 and the outer furnace body 52. ​​An outlet 521 communicating with the hollow interlayer 53 is provided on the top outer wall of the outer furnace body 52, and an outlet pipe 66 is sealed and connected to the outlet 521. An inlet 522 communicating with the hollow interlayer 53 is provided on the bottom outer wall of the outer furnace body 52, and an inlet pipe 65 is sealed and connected to the inlet 522.

[0088] like Figure 1 As shown, in this embodiment, a feed inlet 511 communicating with the furnace cavity of the inner furnace body 51 is provided on the top outer wall of the inner furnace body 51. The feed inlet 511 is sealed to the outlet of the feed auger 67. A syngas outlet 512 communicating with the furnace cavity of the inner furnace body 51 is provided at the top of the inner furnace body 51. A syngas conveying pipe 68 is sealed to the syngas outlet 512. The output syngas has a high temperature, so the syngas outlet 68 is connected to a water cooling device 1000 in sequence through the syngas conveying pipe 68. The water cooling device 1000 may include a downstream heat exchanger and a downstream dust collector. The syngas is cooled by the downstream heat exchanger and dusted by the downstream dust collector before being output.

[0089] like Figure 7 , Figure 8 and Figure 9 As shown, in this embodiment, a refractory cement casting partition 81 is provided in the lower section of the furnace cavity of the inner furnace body 51. The refractory cement casting partition 81 divides the furnace cavity of the inner furnace body 51 into two chambers: a gasification reaction chamber 514 and a partition chamber 515.

[0090] A vertically penetrating ash discharge channel 85 is provided in the middle of the refractory cement casting partition 81; a number of vertically penetrating installation channels 811 are evenly spaced on the refractory cement casting partition 81, and a wind cap structure 82 is correspondingly provided in each installation channel 811, and the location of each air outlet 821 on the wind cap structure 82 extends above the corresponding installation channel 811.

[0091] An annular pipe 83 is provided in the partition chamber 515. A first connecting hole and several second connecting holes are provided on the annular pipe 83. A steam inlet pipe 84 is sealed and connected to the first connecting hole. The steam inlet pipe 84 passes through the through hole on the reactor and extends out of the reactor. Each second connecting hole corresponds to the position of the air inlet hole 822 at the bottom of each wind cap structure 82, and the air inlet hole 822 at the bottom of each wind cap structure 82 is sealed and connected to the corresponding second connecting hole.

[0092] like Figure 1As shown, in this embodiment, the bottom of the inner furnace body 51 is open to form an opening, and an ash hopper 57 is sealed and installed at the opening. An ash discharge valve is installed at the ash discharge port of the ash hopper 57.

[0093] The reactor is wrapped with a refractory layer, and the inlets of the gas outlet pipe 66, gas inlet pipe 65, steam inlet pipe 84, and feed auger 67 all extend outside the refractory layer.

[0094] The steam outlet of the steam boiler 800 is connected to the steam inlet of the steam heater 500 through a first connecting pipe, and the steam outlet of the steam heater 500 is connected to the steam inlet pipe 84 of the gasification reactor 400 through a second connecting pipe.

[0095] The high-temperature steam entering the hollow jacket 53 of the gasification reactor 400 comes from the steam heater 500. The initial steam that needs to be heated by the steam heater 500 comes from the steam boiler 800. The steam temperature generated by the steam boiler 800 is usually around 150°C. This steam is introduced into the steam inlet 13 of the steam heater and enters the second cavity 102 in the rightmost cavity unit 10 through the steam inlet 13. It then flows sequentially through each of the second heat exchange tubes 35, the lower cavity 103, each of the first heat exchange tubes 34, and the first cavity 101 in the cavity unit 10 before flowing into the adjacent cavity unit 10 on the left side of the cavity unit. The steam flow path is a serpentine path.

[0096] High-temperature gas (typically around 1000℃) enters the central cavity 103 of the leftmost cavity unit 10 through the gas inlet, and flows out from the gas outlet after passing through the central cavity 103 of each cavity unit 10 from left to right. During this process, the high-temperature gas indirectly exchanges heat with the steam in each of the first heat exchange tubes 34 and the second heat exchange tubes 35, releasing heat.

[0097] During the flow of steam and high-temperature gas, the steam located in each of the first heat exchange tubes 34 and the second heat exchange tubes 35 indirectly exchanges heat with the high-temperature gas outside the tubes. After absorbing heat, the steam is output, and the output steam temperature can reach above 800℃, which meets the steam temperature required by the gasification reactor 400. The steam flow path is designed as a serpentine path, which can increase the heat exchange path and thus improve the heat exchange efficiency. After heat exchange, the high-temperature steam output from the steam heater 500 is usually above 800℃.

[0098] High-temperature steam (above 800°C) output from the gas outlet of the steam heater 500 enters each wind cap structure 82 through the second connecting pipe, steam inlet pipe 84, and annular pipe 83. Then, it enters the gasification reaction chamber 514 through each air outlet 821 on each wind cap structure 82. The wind cap structure 82 is set here to allow the high-temperature steam to be more evenly distributed in the gasification reaction chamber 514, so that the material entering the gasification reaction chamber 514 can fully contact the high-temperature steam to undergo a gasification reaction, thereby improving the gasification reaction efficiency. In addition, the high-temperature gas is introduced through the hollow jacket 53 to assist heating, further improving the gasification reaction efficiency.

[0099] Materials such as biomass raw materials and carbon produced from biomass raw materials enter the furnace cavity of the inner furnace body 51 through the feeding auger 67, and come into contact with the high-temperature steam that enters the gasification reaction chamber 514 through the air outlets 821 on each wind cap structure 82. The material flows from top to bottom, and the high-temperature steam flows from bottom to top. The ash after the gasification reaction falls downward through the ash outlet channel 85, while the syngas after the gasification reaction rises and is output outside the reactor through the syngas conveying pipeline 68.

[0100] The steam heater in the above production line has the advantages of simple and compact structure, simple operation, low energy consumption and economic and environmental protection, and can efficiently and economically produce high-temperature steam at a temperature of over 800℃; the gasification reactor in the above production line has the advantages of high gasification efficiency, virtually no tar residue, and virtually no residual carbon residue; the syngas produced by the gasification reactor can be directly synthesized into green methanol without the addition of other substances, and can also be used to produce hydrogen. Example 3

[0101] Using charcoal for gasification is more effective than using biomass feedstock, resulting in purer syngas and less tar and residue formation. Therefore, this embodiment adds a biomass carbonization furnace 100 to the structure described in Embodiment 2. The biomass carbonization furnace 100 has a discharge auger 200 at its biochar outlet, and the discharge port of the discharge auger 200 is connected to the inlet of the feed auger 300. The biomass feedstock is carbonized in the biomass carbonization furnace 100 to obtain biochar, which then enters the gasification reactor 400 via the discharge auger 200 and the feed auger 300 for gasification.

[0102] Steam boiler 800 typically uses coal or similar fuels. However, this design takes into account the issue of green energy and therefore adopts a first biomass gasifier 900. The combustible gas outlet of the first biomass gasifier 900 is connected to the fuel supply inlet of the steam boiler 800 through a third connecting pipeline. Biomass raw materials are gasified in the first biomass gasifier 900 to obtain combustible gas, which is then used as fuel for the steam boiler 800.

[0103] Furthermore, the high-temperature gas in the steam heater 500 originates from high-temperature flue gas. A combustion chamber 600 is installed at the gas inlet of the steam heater 500, and the flue gas outlet of the combustion chamber 600 is connected to the gas inlet of the steam heater 500 via a left-side flue gas pipe 15. The combustion material in the combustion chamber 600 can be combustible gas or combustible solid material. Considering economic and environmental factors, a second biomass gasifier 700 is used. The combustible gas outlet of the second biomass gasifier 700 is connected to the air inlet of the first burner 2 installed on the combustion chamber 600 via a fourth connecting pipe. Figure 1 and Figure 2 As shown, the biomass raw material is gasified by the second biomass gasifier 700 to produce combustible gas, and then the combustible gas produced by biomass gasification is introduced into the first burner 2 to burn and produce high-temperature gas.

[0104] The steam heater 500 utilizes the steam produced by the steam boiler 800 (the steam temperature is usually around 150°C) and the combustible gas produced by biomass gasification. By burning the combustible gas to generate high-temperature flue gas, the steam produced by the steam boiler 800 is reheated, thereby raising the steam temperature to above 800°C.

[0105] The flue gas flowing out of the gas outlet of the heating furnace body 1 needs to be treated. A heat exchanger 42 and an induced draft fan 43 are installed. The gas outlet of the heating furnace body 1 is connected to the air inlet of the heat exchanger 42 and the induced draft fan 43 in sequence through the right flue gas pipe 41.

[0106] A more preferred embodiment is that the furnace cavity of the heating furnace body 1 is designed in a cuboid shape; the first connection port 105 corresponding to each cavity unit 10 is connected to the first cavity 101 of the cavity unit 10 through a frustum-shaped first connection pipe 107; the second connection port 106 corresponding to each cavity unit 10 is connected to the second cavity 102 of the cavity unit 10 through a frustum-shaped second connection pipe 108, such as... Figure 3 As shown.

[0107] A more preferred embodiment is that the gas inlet is connected to the central cavity 103 in the leftmost cavity unit 10 via a frustum-shaped third connecting pipe 11; and the gas outlet is connected to the central cavity 103 in the rightmost cavity unit 10 via a frustum-shaped fourth connecting pipe 12. Figure 2 , Figure 4 and Figure 5 As shown.

[0108] In this embodiment, the partition wall that divides the heating furnace body 1 into several independent cavity units 10 can be two partition walls, one partition wall separating two adjacent upper cavities and the other partition wall separating two adjacent lower cavities. Alternatively, the partition wall can be designed as a single unit, with a connecting hole in the middle to allow two adjacent middle cavities to communicate.

[0109] like Figure 1 and Figure 2 As shown, the preferred positional relationship of the first partition plate 31, the second partition plate 32, the third partition plate 33, the first heat exchange tubes 34, and the second heat exchange tubes 35 in each cavity unit 10 is as follows: the first partition plate 31 and the second partition plate 32 are arranged horizontally; the third partition plate 33 is perpendicular to the first partition plate 31; the axis of each first heat exchange tube 34 is perpendicular to the first partition plate 31, and the axis of each second heat exchange tube 35 is perpendicular to the first partition plate 31.

[0110] The first heat exchange tubes 34 in each cavity unit 10 are evenly spaced, and the second heat exchange tubes 35 in each cavity unit 10 are also evenly spaced; the number of first heat exchange tubes 34 in each cavity unit 10 is the same as the number of second heat exchange tubes 35. A more preferred embodiment is that each first heat exchange tube 34 and each second heat exchange tube 35 adopts a circular tube structure with a uniform aperture, such as... Figure 5 and Figure 6 As shown.

[0111] In each cavity unit 10, the first partition plate 31 can be an independent plate, or it can be a part of a whole plate, with all the first partition plates 31 forming a whole plate. The second partition plate 32 can be in the same way.

[0112] The hollow jacket 53 of the gasification reactor 400 is used to introduce high-temperature gas to provide auxiliary heating to the inner furnace body 51, ensuring the gasification reaction temperature within the furnace cavity of the inner furnace body 51 and improving gasification efficiency. A more preferred embodiment is that the hollow jacket 53 is provided with several spiral blades 64, and each spiral blade 64 is evenly spaced along a spiral trajectory spiraling upwards from bottom to top. This arrangement increases the path of the high-temperature gas, improves heat exchange efficiency, and further ensures gasification efficiency.

[0113] The high-temperature gas in the gasification reactor 400 also originates from high-temperature flue gas. The syngas delivery pipe 68 of the gasification reactor 400 is connected to the syngas supply pipe and the fifth connecting pipe, respectively. The fifth connecting pipe is connected to the second burner 63 in the inlet pipe of the gasification reactor 400. The syngas supply pipe is connected to the downstream heat exchanger and the downstream dust collector in sequence. After being cooled by the downstream heat exchanger and dusted by the downstream dust collector, the gas is output. At this time, the high-temperature gas introduced into the hollow jacket 53 of the gasification reactor 400 is a portion of the syngas produced by the reaction in the gasification reactor 400, which is obtained by combustion. For example, 10% of the syngas is introduced into the second burner 63 through the fifth connecting pipe. The proportion can be controlled by the opening degree of the valve installed on the fifth connecting pipe. The syngas introduced into the second burner 63 is burned to produce high-temperature flue gas. The high-temperature flue gas enters the hollow jacket 53 and rises under the guidance of each spiral blade 64, and is finally discharged from the outlet pipe 66.

[0114] Furthermore, to prevent outside air from entering the ash discharge hopper 57 through the ash discharge valve and then flowing upwards into the gasification reaction chamber 514, thus affecting the gasification reaction, this embodiment sets the aforementioned ash discharge valve as a dual-valve structure, namely including: a first valve 72, a second valve 74, and a transition section 73 connecting the outlet of the first valve 72 and the inlet of the second valve 74. When ash discharge is required, the first valve 72 is first opened while the second valve 74 remains closed, allowing the ash to fall into the transition section 73. Then, the first valve 72 is closed, and the second valve 74 is opened again, thus clearing the ash from the transition section 73.

[0115] A more preferred embodiment is that the top of the inner furnace body 51 protrudes upwards beyond the outer furnace body 52, and the part of the inner furnace body 51 that protrudes beyond the outer furnace body 52 is a frustum section 513 in the shape of a frustum. In this case, the synthesis gas outlet 512 is located on the top surface of the frustum section 513; and the feed inlet 511 is located on the side wall of the frustum section 513.

[0116] The entire reactor reacts at high temperatures, so a refractory layer needs to be wrapped around the outside of the reactor. The refractory layer wrapped around the frustum section 513 is a refractory layer made of refractory cement—the first refractory layer 54.

[0117] The refractory layer surrounding the outer furnace body 52 is a refractory brick layer 55. A metal outer shell 56 with several claw studs inside covers the refractory brick layer 55. In actual manufacturing, an additional layer of insulation cotton can be added between the refractory brick layer 55 and the metal outer shell 56. The refractory layer surrounding the ash hopper 57 is a second refractory layer 58, which is a refractory layer made of refractory cement.

[0118] The ash produced by gasification has a high temperature. Therefore, in this embodiment, a cooling pipe 71 is provided in the inner cavity of the ash discharge hopper 57. The inlet end 711 of the cooling pipe 71 passes through the first connecting through hole on the ash discharge hopper 57 and the second connecting through hole on the second refractory layer 58, and then extends out of the second refractory layer 58. The outlet end 712 of the cooling pipe 71 passes through the third connecting through hole on the ash discharge hopper 57 and the fourth connecting through hole on the second refractory layer 58, and then extends out of the second refractory layer 58. The cooling medium enters the cooling pipe 71 through the inlet end 711 to cool the ash in the ash discharge hopper 57, and then flows out through the outlet end 712 of the cooling pipe 71.

[0119] To facilitate a direct understanding of the material level and temperature inside the inner furnace body 51, this embodiment includes a level gauge 61 on the reactor for measuring the material level in the furnace cavity of the inner furnace body 51; and a temperature sensor 62 on the reactor for measuring the temperature inside the furnace cavity of the inner furnace body 51.

[0120] The steam heater in the above production line has the advantages of simple and compact structure, simple operation, low energy consumption and economic and environmental protection, and can efficiently and economically produce high-temperature steam at a temperature of over 800℃; the gasification reactor in the above production line has the advantages of high gasification efficiency, virtually no tar residue, and virtually no residual carbon residue; the syngas produced by the gasification reactor can be directly synthesized into green methanol without the addition of other substances, and can also be used to produce hydrogen.

[0121] In addition, the fuel source for the steam boiler 800 and the high-temperature flue gas fuel source for the steam heater 500 both come from the combustible gas generated by the gasification of the biomass gasifier. The high-temperature flue gas fuel for the gasification reactor 400 comes from part of the syngas in the gasification reaction. The raw material in the gasification reactor 400 comes from the biochar generated by the carbonization of the biomass carbonization furnace 100. The entire production line uses green and environmentally friendly biomass raw materials, which is economical, environmentally friendly and energy-efficient.

[0122] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A biomass-to-syngas production line, including: The steam boiler is characterized by further comprising: a steam heater and a gasification reactor; The steam heater has two heat exchange channels: a high-temperature gas heat exchange channel and a steam heat exchange channel. The positions of the high-temperature gas heat exchange channel and the steam heat exchange channel are arranged so that the steam entering the steam heat exchange channel can indirectly exchange heat with the high-temperature gas entering the high-temperature gas heat exchange channel. The structure of the gasification reactor includes: a reactor consisting of an inner furnace body and an outer furnace body, with a closed hollow interlayer formed between the inner furnace body and the outer furnace body; an outlet pipe communicating with the hollow interlayer is provided on the outer wall of the top of the outer furnace body; and an inlet pipe communicating with the hollow interlayer is provided on the outer wall of the bottom of the outer furnace body. A feeding auger communicating with the furnace cavity of the inner furnace body is provided on the outer side wall of the top of the inner furnace body; a syngas conveying pipe communicating with the furnace cavity of the inner furnace body is provided on the top of the inner furnace body; the bottom of the inner furnace body has an open opening communicating with the furnace cavity of the inner furnace body, an ash hopper is installed at the open opening, and an ash discharge valve is installed at the ash discharge port of the ash hopper. A refractory cement casting partition is provided in the lower section of the furnace cavity of the inner furnace body, which divides the furnace cavity of the inner furnace body into two chambers: a gasification reaction chamber and a partition chamber; an ash discharge channel that runs vertically through the middle of the refractory cement casting partition is provided; several vertically through installation channels are evenly spaced on the refractory cement casting partition, and a wind cap structure is provided in each installation channel, with each air outlet on the wind cap structure extending above the corresponding installation channel; An annular pipeline is provided in the partition chamber. A first connection hole and several second connection holes are provided in the annular pipeline. A steam inlet pipe is sealed and connected to the first connection hole. The steam inlet pipe passes through the through hole on the reactor and extends out of the reactor. Each second connection hole corresponds to and matches the air inlet hole at the bottom of each wind cap structure. The air inlet hole at the bottom of each wind cap structure is sealed and connected to the corresponding second connection hole. The reactor is wrapped with a refractory layer, and the outlet of the gas outlet pipe, the inlet of the gas inlet pipe, the inlet of the steam inlet pipe, and the feed inlet of the feed auger are all located outside the refractory layer. The steam outlet of the steam boiler is connected to the steam inlet of the steam heat exchange channel in the steam heater via a first connecting pipe, and the steam outlet of the steam heat exchange channel in the steam heater is connected to the steam inlet pipe of the gasification reactor via a second connecting pipe.

2. The biomass-to-syngas production line according to claim 1, characterized in that: Also includes: Biomass carbonization furnace, first biomass gasification furnace, and second biomass gasification furnace; The biochar outlet of the biomass carbonization furnace is equipped with a front auger, and the discharge port of the front auger is connected to the inlet of the feed auger. The combustible gas outlet of the first biomass gasifier is connected to the fuel supply inlet of the steam boiler via a third connecting pipeline. A combustion chamber is provided at the gas inlet of the high-temperature gas heat exchange channel in the steam heater, and the combustible gas outlet of the second biomass gasification furnace is connected to the first burner installed on the combustion chamber through a fourth connecting pipe. The syngas delivery pipeline of the gasification reactor is connected to the syngas supply pipeline and the fifth connecting pipeline. The fifth connecting pipeline is connected to the second burner in the air inlet pipe on the gasification reactor. A valve is installed on the fifth connecting pipeline to control the amount of syngas delivered to the second burner. The syngas supply pipeline is connected to the air inlet of the water washing device.

3. The biomass-to-syngas production line according to claim 1 or 2, characterized in that: The structure of the steam heater includes: a heating furnace body, wherein the furnace cavity of the heating furnace body is divided into several cavity units from left to right; The structure within each cavity unit is as follows: A first partition plate and a second partition plate are spaced apart from top to bottom within the cavity unit, dividing it into an upper cavity, a middle cavity, and a lower cavity. A third partition plate is provided in the upper cavity, dividing it into a first cavity and a second cavity from left to right. A first connection port communicating with the first cavity is provided at the top of the heating furnace body, and the first cavity is connected to the lower cavity via several first heat exchange tubes disposed in the middle cavity. A second connection port communicating with the second cavity is provided at the top of the heating furnace body, and the second cavity is connected to the lower cavity via several second heat exchange tubes disposed in the middle cavity. The first connection port in each cavity unit is connected to the second connection port in the cavity unit located to the left of the cavity unit via a steam connection pipe; Each first cavity, each second cavity, each steam connecting pipe, each first heat exchange pipe, each second heat exchange pipe, and each lower cavity constitute a steam heat exchange channel that allows steam to flow in a serpentine path; the first connection port in the cavity unit located at the leftmost end is the steam outlet of the steam heat exchange channel, and the second connection port in the cavity unit located at the rightmost end is the steam inlet of the steam heat exchange channel. The central cavity in each cavity unit is connected from left to right, so that the central cavities in all cavity units are connected to form a high-temperature gas heat exchange channel; an air inlet connected to the high-temperature gas heat exchange channel is provided at the left end of the heating furnace body, and the air inlet is the gas inlet of the high-temperature gas heat exchange channel; an air outlet connected to the high-temperature gas heat exchange channel is provided at the right end of the heating furnace body, and the air outlet is the gas outlet of the high-temperature gas heat exchange channel.

4. The biomass-to-syngas production line according to claim 3, characterized in that: The furnace cavity of the heating furnace body is rectangular; the first connection port corresponding to each cavity unit is connected to the first cavity of the cavity unit through a frustum-shaped first connecting pipe; the second connection port corresponding to each cavity unit is connected to the second cavity of the cavity unit through a frustum-shaped second connecting pipe; the gas inlet of the high-temperature gas heat exchange channel is connected to the middle cavity of the cavity unit located at the leftmost end through a frustum-shaped third connecting pipe; the gas outlet of the high-temperature gas heat exchange channel is connected to the middle cavity of the cavity unit located at the rightmost end through a frustum-shaped fourth connecting pipe. The third partition plate in each cavity unit evenly divides the upper cavity of the cavity unit, so that the space of the first cavity and the space of the second cavity in the cavity unit are the same size. The positional relationship of the first partition plate, the second partition plate, the third partition plate, each first heat exchange tube, and each second heat exchange tube in each cavity unit is as follows: the first partition plate and the second partition plate are arranged horizontally; the third partition plate is perpendicular to the first partition plate; the axis of each first heat exchange tube is perpendicular to the first partition plate, and the axis of each second heat exchange tube is perpendicular to the first partition plate. The first heat exchange tubes in each cavity unit are evenly spaced, and the second heat exchange tubes in each cavity unit are evenly spaced. The number of first heat exchange tubes in each cavity unit is the same as the number of second heat exchange tubes.

5. The biomass-to-syngas production line according to claim 3, characterized in that: Also includes: The heat exchanger and the induced draft fan are provided. The gas outlet of the high-temperature gas heat exchange channel is connected to the air inlet of the heat exchanger and the induced draft fan in sequence through the right flue gas pipe.

6. The biomass-to-syngas production line according to claim 1, characterized in that: Several helical blades are provided in the hollow interlayer of the gasification reactor, and each helical blade is evenly spaced along a spiral trajectory that spirals upward from bottom to top.

7. The biomass-to-syngas production line according to claim 1 or 6, characterized in that: The inner furnace body of the gasification reactor protrudes upward from the outer furnace body, and the part of the inner furnace body that protrudes from the outer furnace body is a frustum-shaped section; the syngas delivery pipeline is located on the top surface of the frustum section; the feed auger is located on the side wall of the frustum section.

8. The biomass-to-syngas production line according to claim 1 or 6, characterized in that: A cooling pipe is provided in the inner cavity of the ash discharge hopper in the gasification reactor. The inlet end of the cooling pipe passes through the first connecting through hole on the ash discharge hopper and the second connecting through hole on the refractory layer covering the ash discharge hopper and extends out of the refractory layer covering the ash discharge hopper. The outlet end of the cooling pipe passes through the third connecting through hole on the ash discharge hopper and the fourth connecting through hole on the refractory layer covering the ash discharge hopper and extends out of the refractory layer covering the ash discharge hopper. The ash discharge valve consists of a first valve, a second valve, and a transition section connecting the outlet of the first valve and the inlet of the second valve.

9. The biomass-to-syngas production line according to claim 7, characterized in that: The refractory layer surrounding the truncated cone section is the first refractory layer, which is cast from refractory cement; the refractory layer surrounding the outer furnace body is a refractory brick layer, with a metal shell containing several claw-shaped nails covering the refractory brick layer; the refractory layer surrounding the ash hopper is the second refractory layer, which is cast from refractory cement.

10. The biomass-to-syngas production line according to claim 1, characterized in that: A level gauge is installed on the reactor in the gasification reactor to measure the material level in the furnace cavity of the inner furnace body; a temperature sensor is installed on the reactor to measure the temperature in the furnace cavity of the inner furnace body.

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