CN109852423B

CN109852423B - Biomass gasification circulating system driven by water pipe type condensation saturated steam boiler

Info

Publication number: CN109852423B
Application number: CN201811403267.XA
Authority: CN
Inventors: 肖薛钉; 吴康松; 陈晓堃; 罗权桂
Original assignee: Long Zheng Environmental Protection Co ltd
Current assignee: Long Zheng Environmental Protection Co ltd
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-08-04
Anticipated expiration: 2038-11-23
Also published as: CN109852423A

Abstract

The invention provides a biomass gasification circulating system driven by a water pipe type condensation saturated steam boiler, which comprises the water pipe type condensation saturated steam boiler and a normal-pressure fixed bed biomass gasification furnace, wherein the water pipe type condensation saturated steam boiler provides preheating heat energy, material conveying power and circulating cooling water for the normal-pressure fixed bed biomass gasification furnace, and the normal-pressure fixed bed biomass gasification furnace is used for realizing normal-pressure gasification of biomass. The invention innovatively integrates the normal-pressure fixed bed biomass gasification furnace and the water-tube condensation saturated steam boiler together to realize the recycling of heat energy, and improves the biomass gasification efficiency by designing the gasification pipeline into a square-shaped pipeline structure and integrating and designing the gasification agent pipeline and the square-shaped gasification pipeline together.

Description

Biomass gasification circulating system driven by water pipe type condensation saturated steam boiler

Technical Field

The invention relates to the technical field of carbonaceous substance gasification and heat energy recycling, in particular to a biomass gasification circulating system driven by a water tube type condensation saturated steam boiler, namely a biomass gasification and boiler steam circulating system.

Background

The gasification of carbonaceous material can produce industrial combustible gas (hydrogen, carbon monoxide, etc.), have wide application prospect in the technical field of modern chemical industry, the main technical means to gasify carbonaceous material including biomass in the prior art is a fixed bed gasifier, especially the fixed bed gasifier of the atmospheric pressure, the basic structure includes a gasifier and dust removal purifier set up independently, etc., wherein the top of the gasifier is regarded as the biomass and added the entry, the bottom is regarded as the slag charge and gassy delivery outlet, the gasifying agent is input through the bottom too, the gasification efficiency of this kind of gasifier in the prior art is lower, especially the gasification efficiency to the biomass is lower, patent CN202829965U typically describes this kind of gasifier structure and mode of operation in the prior art. The biomass gasification furnace in the technology does not fully consider the recycling of heat energy in the actual use process, because the gasification of biomass is mostly concentrated in rural households or rural collective economy of certain population, the gasification of biomass is usually accompanied with the use of steam boilers, and the gasified gas of biomass is directly used as boiler fuel or life fuel in most cases, in this case, it is necessary to consider the recycling of energy, such as the recycling of heat between the boiler and the biomass gasification furnace, even if partial heat energy is recycled, the method has important significance for improving the overall efficiency, but the biomass gasification furnace in the prior art has low general gasification efficiency and completely does not consider the circulating working relation with a matched heat energy unit, so that the biomass gasification device is not substantially applied to the existing rural areas.

Disclosure of Invention

The invention provides a biomass gasification and boiler steam circulation system (namely a biomass gasification circulation system driven by a water pipe type condensation saturated steam boiler, which have the same meanings in the invention), and particularly comprises an atmospheric fixed bed biomass gasification furnace device and a water pipe type condensation saturated steam boiler device Gasified gas removes dust, deoils, condenses in an organic whole, has changed traditional split type gasification equipment's project organization, makes gasifier overall structure compacter, and gasification efficiency is higher, and heat utilization efficiency is higher, and it is also all more convenient wholly to arrange, use, has wide popularization and application prospect.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a biomass gasification and boiler steam circulation system, includes water tubular condensation saturated steam boiler device and ordinary pressure fixed bed biomass gasification stove device, water tubular condensation saturated steam boiler device provides preheating heat energy, material conveying power and recirculated cooling water for ordinary pressure fixed bed biomass gasification stove device, ordinary pressure fixed bed biomass gasification stove device is used for realizing the ordinary pressure gasification of living beings.

Further, the steam circulation system of biomass gasification and boiler according to the present invention, wherein the atmospheric fixed bed biomass gasification furnace device comprises: plenum chamber 1, condensation chamber 2, deoiling room 7, clean room 11, vaporizer 16, circle shape gasification pipeline 17, first gasifying agent pipeline 18, second gasifying agent pipeline 20, dry preheating chamber 28, spiral pushing equipment 29, feeding conveying mechanism 32 and gasifying agent chamber 33, dry preheating chamber 28 and vaporizer 16 set up side by side, circle shape gasification pipeline 17 set up simultaneously in dry preheating chamber 28 and vaporizer 16, be in the inside of the circle shape gasification pipeline in the dry preheating chamber 28 is provided with spiral pushing equipment 29, feeding conveying mechanism 32 will be from the biomass charge of feed inlet 31 for spiral pushing equipment 29, gasifying agent chamber 33 connect in first gasifying agent pipeline 18 and second gasifying agent pipeline 20, first gasifying agent pipeline 18 passes behind spiral pushing equipment 29 the inside of circle shape gasification pipeline 17 sets up along the central axis extending direction of circle shape gasification pipeline 17, second gasification agent pipeline 20 hugs closely the outer wall of returning shape gasification pipeline 17 sets up along the outer wall extending direction of returning shape gasification pipeline 17, evenly distributed has a plurality of first gasification agent export 19 on the first gasification agent pipeline 18, evenly distributed has a plurality of second gasification agent export 21 on the second gasification agent pipeline 20, the clean room 11 set up in 16 tops of gasification room, and with the gasification room intercommunication, the grease trap room 7 set up in 11 tops of clean room, and with 11 intercommunications in clean room, the condensation chamber 2 set up in grease trap room 7 top, collection chamber 1 set up in 2 tops of condensation chamber, collection chamber 1 through pass through the gas collection pipeline 5 of condensation chamber 2 communicate in grease trap room 7.

Further in accordance with the present invention, the system comprises a steam cycle system of biomass gasification and boiler, wherein the water tube type condensation saturated steam boiler device comprises: steam boiler 35, heat transfer pipeline 36, steam pocket 37, steam turbine 38, moisturizing condenser 39, first booster pump 40, oxygen-eliminating device 41, second booster pump 42 and a plurality of connecting line, heat transfer pipeline 36 set up in steam boiler 35, the input and the output of heat transfer pipeline 36 stretch out outside the steam boiler, the input of heat transfer pipeline 36 is provided with second booster pump 42, second booster pump 42 through connecting line connect in oxygen-eliminating device 41, oxygen-eliminating device 41 through connecting line connect in the condensation chamber of ordinary pressure fixed bed biomass gasification stove device, the output of heat transfer pipeline 36 is provided with steam pocket 37, steam pocket 37 through connecting line connect in the hot steam input of steam turbine 38, the cold steam discharge end of steam turbine 38 through connecting line connect in moisturizing condenser 39, the water replenishing condenser 39 is connected to the first booster pump 40 through a connecting pipeline, and the first booster pump 40 is connected to a condensing chamber of the normal-pressure fixed bed biomass gasification furnace device through a connecting pipeline; the steam power output end of the steam turbine 38 is in transmission connection with a spiral pushing mechanism 29 of the normal-pressure fixed bed biomass gasification furnace device; the steam boiler 35 is connected to the dry preheating chamber 28 of the atmospheric fixed bed biomass gasification furnace unit through a heat transfer pipeline 44.

Further, according to the biomass gasification and boiler steam circulation system of the present invention, the loop-shaped gasification pipeline 17 in the atmospheric fixed bed biomass gasification furnace device is formed by connecting two reverse U-shaped pipelines in series, the first U-shaped pipeline has an upward opening, the second U-shaped pipeline has a downward opening, and the first U-shaped pipeline and the second U-shaped pipeline share a U-shaped arm; the left U-shaped arm of the first U-shaped pipeline is positioned in the drying and preheating chamber 28, the spiral pushing mechanism 29 is arranged in the left U-shaped arm of the first U-shaped pipeline, the spiral pushing mechanism 29 comprises a central rotating shaft and a spiral blade arranged on the central rotating shaft, and the central rotating shaft is connected with a steam power output shaft of a steam turbine 38 in the water-tube type condensation saturated steam boiler device through a conveying belt; the discharge end of the feeding conveying mechanism 32 is aligned with the top opening of the left U-shaped arm of the first U-shaped pipeline, the drying and preheating chamber 28 preheats the biomass material entering the left U-shaped arm of the first U-shaped pipeline, and the spiral pushing mechanism 29 provides driving power for conveying the material in the zigzag gasification pipeline; one end of the first gasifying agent pipeline is connected to the gasifying agent chamber 33, the first gasifying agent pipeline 18 passes through the central rotating shaft of the spiral pushing mechanism 29 and then forms a loop-shaped pipeline structure in the loop-shaped gasifying pipeline 17 along the extension direction of the central axis of the loop-shaped gasifying pipeline 17, the other end of the first gasifying agent pipeline is a closed end and is arranged close to the discharge end of the loop-shaped gasifying pipeline 17, and the first gasifying agent outlets 19 are uniformly formed in the part of the first gasifying agent pipeline extending out of the central rotating shaft; one end of the second gasifying agent pipeline is connected to the gasifying agent chamber 33, the second gasifying agent pipeline is an outer sleeve which is arranged to cover the outer wall of the zigzag gasifying pipeline or is of a zigzag pipeline structure which is arranged along the extending direction of the outer wall of the zigzag gasifying pipeline 17, and the other end of the second gasifying agent pipeline is a closed end and is arranged close to the discharge end of the zigzag gasifying pipeline 17; the second U-shaped pipe of the loop-shaped gasification pipe 17 is completely located in the gasification chamber.

The biomass gasification and boiler steam circulation system is further characterized in that the first gasifying agent outlet and the second gasifying agent outlet are one-way gas discharge holes formed along the material propelling direction; a discharge boss 22 is arranged at the discharge end of the zigzag gasification pipeline; the gasification chamber is just being provided with ejection of compact cavity to the position of returning shape gasification pipeline discharge end, be provided with ejection of compact bottom plate 24, ejection of compact gate valve 25 in the ejection of compact cavity, arrange material bottom plate 26 and arrange material gate valve 27, ejection of compact bottom plate 24 carries out switching control through ejection of compact gate valve 25, and when the slag charge that falls into on ejection of compact bottom plate 24 reaches preset weight, ejection of compact gate valve control ejection of compact bottom plate 24 is opened, and the slag charge falls into back on arranging material bottom plate 26 through ejection of compact bottom plate 24, and ejection of compact gate valve control ejection of compact bottom plate is closed, arranges material bottom plate 26 through arranging material gate valve 27 and carries out switching control, and when the slag charge that falls into on arranging material bottom plate 26 reaches preset weight and ejection of compact.

Further, according to the biomass gasification and boiler steam circulation system, the top of the gasification chamber is provided with a plurality of air guide channels 15, the gasification chamber is communicated with the dust removal chamber through the air guide channels 15, a dust removal net 13 is arranged in the dust removal chamber, and the side wall of the dust removal chamber is provided with an operation door 14.

Further, according to the biomass gasification and boiler steam circulation system of the present invention, the degreasing chamber 7 in the atmospheric pressure fixed bed biomass gasification furnace device includes a conical cooling wall 8 and an oil collecting bottom plate 9, the conical cooling wall 8 is located above the oil collecting bottom plate 9, and an oil removing space is formed between the conical cooling wall 8 and the oil collecting bottom plate 9, the top of the conical cooling wall 8 is provided with a cooling structure, the conical cooling wall 8 includes a plurality of inverted conical funnel structures, the conical surface of each inverted conical funnel structure is downward facing the oil collecting bottom plate 9, the funnel outlet of each inverted conical funnel structure is upward communicated with the gas collecting pipeline 5, the side wall of the degreasing chamber 7 is formed with an oil output door 10, the degreasing chamber 7 is communicated with the dust removing chamber 11 through a gas guide tube 12, and the gas guide tube 12 downward extends into the dust removing chamber, Upwards extend into the deoiling room, and the top of air duct 12 is outstanding in oil collection bottom plate 9 predetermined height, sealing connection between air duct 12 and the oil collection bottom plate 9.

Further, according to the biomass gasification and boiler steam circulation system of the present invention, the condensing chamber 2 in the atmospheric pressure fixed bed biomass gasification furnace device includes a plurality of gas collecting pipes 5, the bottom end of each gas collecting pipe 5 is connected to a funnel outlet of an inverted cone-shaped funnel structure in the oil removal chamber 7, the top end of each gas collecting pipe 5 is communicated with the gas collection chamber 1, the outer wall of each gas collecting pipe 5 is correspondingly surrounded by a water-cooled sleeve 6, the bottom ends of the water-cooled sleeves are communicated with each other through a common water-cooled cavity, the common water-cooled cavity is a closed planar water-cooled cavity laid along the outer top surface of the conical cooling wall 8 of the oil removal chamber, the common water-cooled cavity is simultaneously communicated with the water-cooled sleeves 6, a cooling water inlet 3 is formed on the side wall of the common water-cooled cavity, and the tops of the water-cooled sleeves are communicated with each other through an outlet water communication pipe, and the water outlet communicating pipe is connected with the cooling water outlet 4, the cooling water inlet 3 is connected with the first booster pump 40 in the water tube type condensation saturated steam boiler device through a connecting pipe, and the cooling water outlet 4 is connected with the deaerator 41 in the water tube type condensation saturated steam boiler device through a connecting pipe.

Further, according to the biomass gasification and boiler steam circulation system of the present invention, the gas collection chamber is communicated with the top end of each gas collection pipeline, and the gas collection chamber is connected with a gasified gas output pipe 34; the connecting pipeline is provided with a valve, the heat-carrying pipeline 44 is provided with a dust remover 43, and the drying and preheating chamber 28 is provided with a hot carrier gas outlet 30 which is opened and closed based on hot-pressing control.

The main technical innovation characteristics and technical advantages of the biomass gasification and boiler steam circulation system comprise the following aspects:

1) the biomass gasification system has the advantages that the normal-pressure fixed bed biomass gasification furnace device and the water-tube condensation saturated steam boiler device are innovatively integrated into the biomass gasification and boiler steam circulation system, the gasification efficiency is improved, the heat energy utilization rate is improved, and the application and development of the biomass gasification technology can be well promoted.

2) The water pipe type condensation saturated steam boiler device innovatively realizes steam work and heat energy circulation of cooling water, not only realizes water recycling, but also realizes heat energy recycling by taking water as coal, particularly realizes integral integration with a biomass gasification furnace innovatively, and has wide popularization and application prospects.

3) The biomass gasification furnace device of the normal-pressure fixed bed innovatively integrates preheating and drying, gasification reaction, slag collection, gasified gas dust removal, oil removal and condensation, changes the design structure of the traditional split gasification device, and has the advantages of more compact overall structure, higher working efficiency and more convenient arrangement and application.

4) The drying preheating chamber and the gasification chamber of the gasification furnace are innovatively and independently arranged, and the gasification pipeline simultaneously penetrates through the drying preheating chamber and the gasification chamber, so that the reaction preheating process and the gasification spontaneous process of the gasification furnace can be reasonably controlled, and the gasification furnace is suitable for gasification reaction of various materials.

5) The gasification pipeline of the gasification furnace is designed into a zigzag pipeline structure, and particularly, the gasification pipeline structure is formed by reversely connecting two U-shaped pipelines which are reversely arranged in series, so that the gasification efficiency is greatly improved.

6) The gasification agent pipeline of the gasification furnace is innovatively integrated with the loop-shaped gasification pipeline, and particularly the first gasification agent pipeline is arranged inside the loop-shaped gasification pipeline along the central axis, so that the gasification agent provided by the first gasification agent pipeline can be deeply mixed in the biomass material.

7) The second gasification agent pipeline of the gasification furnace is innovatively arranged along the outer wall of the zigzag-shaped gasification pipeline, the arrangement forms are various, the second gasification agent pipeline can be a sleeve structure wrapped along the outer wall of the zigzag-shaped gasification pipeline, and the second gasification agent pipeline can also be a pipeline structure extending along the outer wall of the zigzag-shaped gasification pipeline, and the second gasification agent pipeline depends on the demand and the transportation mode of the second gasification agent, so that the gasification furnace can have a wider application range.

8) The gasification agent outlet on the first and second gasification agent pipelines of the gasification furnace is innovatively arranged to be in a one-way gas discharge hole structure, so that the gasification agent is output under the positive pressure effect to be mixed with the materials, but the materials cannot block the materials.

9) The bottom of the gasification chamber of the gasification furnace is innovatively provided with the secondary discharging structure, namely, solid slag firstly falls onto the blanking bottom plate which is opened and closed by weight induction, after gasified gas mixed in the solid slag is fully released, the solid slag continuously falls onto the discharging bottom plate, the discharging bottom plate is not opened at the moment, the discharging bottom plate is automatically and elastically closed, and then the discharging bottom plate is opened to discharge the slag, so that the external air is prevented from entering the gasification chamber.

10) The invention innovatively arranges the dust removal chamber, the oil removal chamber, the condensation chamber and the gas collection chamber on the upper part of the gasification chamber of the gasification furnace in sequence, and sequentially removes dust, removes oil, condenses and collects gasified mixed gas, thereby improving the post-treatment efficiency of the gasified gas by an integrated equipment structure, and simultaneously innovating the structures of the oil removal chamber and the condensation chamber and improving the dust removal and purification efficiency.

11) The biomass gasification and boiler steam circulation system can be suitable for biomass gasification and can also be suitable for gasification reaction of other similar carbonaceous substances, and has wide popularization and application prospects.

Drawings

FIG. 1 is a schematic structural view of a biomass gasification and boiler steam cycle system according to the present invention.

The meanings of the reference symbols in the figures are as follows:

1-a gas collection chamber, 2-a condensation chamber, 3-a cooling water inlet, 4-a cooling water outlet, 5-a gas collection pipeline, 6-a water-cooled sleeve, 7-a degreasing chamber, 8-a conical cooling wall, 9-an oil collection bottom plate, 10-an oil output door, 11-a dust removal chamber, 12-an air guide pipe, 13-a dust removal net, 14-an operation door, 15-an air guide channel, 16-a gasification chamber, 17-a zigzag gasification pipeline, 18-a first gasification agent pipeline, 19-a first gasification agent outlet, 20-a second gasification agent pipeline, 21-a second gasification agent outlet, 22-a discharge boss, 23-ash, 24-a discharge bottom plate, 25-a discharge gate valve, 26-a discharge bottom plate, 27-a discharge gate valve and 28-a drying preheating chamber, 29-spiral pushing equipment, 30-hot carrier gas outlet, 31-feeding inlet, 32-feeding conveying equipment, 33-gasifying agent chamber, 34-gasifying gas output pipe, 35-steam boiler, 36-heat exchange pipeline, 37-steam drum, 38-steam turbine, 39-water replenishing condenser, 40-booster pump, 41-deaerator, 42-booster pump, 43-dust remover and 44-heat carrier pipeline.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings to enable those skilled in the art to more clearly understand the present invention, but not to limit the scope of the present invention.

The invention innovatively provides a water tube type condensation saturated steam boiler device and an atmospheric fixed bed biomass gasification furnace device with brand-new structures, and innovatively provides a biomass gasification and boiler steam circulating system, wherein the biomass gasification and boiler steam circulating system integrally comprises the water tube type condensation saturated steam boiler device and the atmospheric fixed bed biomass gasification furnace device, and the water tube type condensation saturated steam boiler device and the atmospheric fixed bed biomass gasification furnace device are integrated into a complete biomass gasification and heat energy recycling system.

Specifically, as shown in fig. 1, the normal pressure fixed bed biomass gasification furnace device included in the biomass gasification and boiler steam circulation system (i.e. the biomass gasification circulation system) of the present invention includes a gas collection chamber 1, a condensation chamber 2, an oil removal chamber 7, a dust removal chamber 11, a gasification chamber 16, a looped gasification pipe 17, a first gasification agent pipe 18, a second gasification agent pipe 20, a drying preheating chamber 28, a spiral pushing mechanism 29, a feeding conveying mechanism 32 and a gasification agent chamber 33, wherein the feeding conveying mechanism 32 is disposed at a feeding port 31 for biomass feeding and conveying, the drying preheating chamber 28 and the gasification chamber 16 are disposed side by side, the looped gasification pipe 17 is disposed in the drying preheating chamber 28 and the gasification chamber 16 at the same time, the spiral pushing mechanism 29 is disposed inside the looped gasification pipe portion in the drying preheating chamber 28, the gasification agent chamber 33 is connected to the first gasification agent pipe 18 and the second gasification agent pipe 20, the gasification agent chamber 33 preferably provides two gasification agents, namely water vapor and oxygen (or air), the water vapor is provided for the biomass in the zigzag gasification pipeline 17 through the first gasification agent pipeline 18, the oxygen is provided for the biomass in the zigzag gasification pipeline 17 through the second gasification agent pipeline 20, the first gasification agent pipeline 18 extends along the central axis of the zigzag gasification pipeline 17 in the zigzag gasification pipeline 17, the second gasification agent pipeline 20 is tightly attached to the outer wall of the zigzag gasification pipeline 17 and extends along the outer wall of the zigzag gasification pipeline 17, a plurality of first gasification agent outlets 19 are uniformly distributed on the first gasification agent pipeline, a plurality of second gasification agent outlets 21 are uniformly distributed on the second gasification agent pipeline 20, and the first gasification agent outlets 19 and the second gasification agent outlets 21 are preferably one-way gas outlet holes, dust removal chamber 11 set up in 16 tops of vaporizer, and with the vaporizer passes through air guide channel 15 intercommunication, grease trap room 7 set up in 11 tops of dust removal chamber, and with dust removal chamber 11 passes through air duct 12 intercommunication, condensation chamber 2 set up in grease trap room 7 top, collection chamber 1 set up in 2 tops of condensation chamber, collection chamber 1 through pass through the gas collection pipeline 5 of condensation chamber communicate in grease trap room 7.

Furthermore, the loop-shaped gasification pipeline 17 is formed by integrally connecting two reverse U-shaped pipelines in series, the opening of the first U-shaped pipeline is upward, the opening of the second U-shaped pipeline is downward, and the first U-shaped pipeline and the second U-shaped pipeline share one U-shaped arm. The left U-shaped arm of the first U-shaped pipeline is located in the drying preheating chamber 28, the left U-shaped arm is internally provided with the spiral pushing mechanism 29, the spiral pushing mechanism 29 comprises a central rotating shaft and a spiral blade arranged on the central rotating shaft, the central rotating shaft is connected to the power output end of a water pipe type condensation saturated steam boiler device through a conveying belt, the central rotating shaft is driven to rotate through the water pipe type condensation saturated steam boiler device, the spiral blade is driven to rotate, and therefore the biomass material entering the left U-shaped arm can be pushed into a second U-shaped pipeline in a spiral mode. The feeding mechanism 32 is arranged in the feeding hole of the gasification furnace, the discharging end of the feeding mechanism 32 is aligned with the top opening of the left U-shaped arm of the first U-shaped pipeline, the drying and preheating chamber 28 is used for providing necessary drying temperature and gasification triggering preheating for the biomass material entering the left U-shaped arm of the first U-shaped pipeline, the drying and preheating chamber 28 surrounds the left U-shaped arm to form a relatively closed external heating space, the heat of the drying and preheating chamber 28 is also from a water pipe type condensation saturated steam boiler device, and the heat recycling is ensured. One end of the first gasifying agent pipeline is connected to the gasifying agent chamber 33, the first gasifying agent pipeline penetrates through a central rotating shaft of the spiral pushing mechanism and extends along the central axis of the zigzag gasification pipeline 17, the whole gasification device also has a zigzag structure, the other end of the first gasifying agent pipeline is a closed end and is close to the outlet end of the zigzag gasification pipeline 17, a plurality of first gasifying agent outlets 19 are formed in the first gasifying agent pipeline, and the first gasifying agent outlets 19 are preferably unidirectional gas discharge holes. Leading to in the first gasification agent pipeline has first gasification agent, preferred first gasification agent is vapor, through setting up the central authorities that appear gasification pipe way in returning with the innovation of first gasification agent pipeline, can ensure that first gasification agent can continuously be heated and be the steam state all the time, and more can ensure that the mixing that first gasification agent can be even provides to biomass material inner wall, improves gasification efficiency. The second gasifying agent pipeline is arranged along the outer wall of the zigzag gasification pipeline, can be an outer sleeve arranged along the whole outer wall of the zigzag gasification pipeline, and can also be a zigzag pipeline structure arranged along the partial outer wall of the zigzag gasification pipeline as shown in the attached figure 1. One end of the second gasifying agent pipeline is connected to the gasifying agent chamber 33, the other end of the second gasifying agent pipeline is a closed end and is close to the outlet end of the zigzag gasification pipeline 17 and used for providing a second gasifying agent, the preferred second gasifying agent can be air or oxygen, the second gasifying agent pipeline is innovatively arranged along the outer wall of the zigzag gasification pipeline, so that the second gasifying agent can uniformly provide the second gasifying agent along the whole gasification pipeline, a plurality of second gasifying agent outlets communicated with the zigzag gasification pipeline are arranged on the second gasifying agent pipeline, the preferred second gasifying agent outlet is a one-way gas discharge hole arranged along the material propelling direction, and the second gasifying agent is blown out under the positive pressure effect and cannot enter materials. The gasification chamber 16 is a main reaction space for normal pressure gasification of biomass, the second U-shaped pipeline of the looped gasification pipeline 17 is completely arranged in the gasification chamber, a starting preheating condition required by biomass gasification is provided through the drying distillation chamber 28, biomass starts to be oxidized and releases heat under the condition, and the released heat is enough to maintain the gasification heat requirement of the biomass in the looped gasification pipeline 17 in the gasification chamber, so that components of the biomass are gasified in the process of pushing material. The invention uses the loop-shaped gasification pipeline to prolong the biomass gasification reaction path, improves the gasification efficiency, leads in the loop-shaped gasification pipeline to ensure that the biomass material can stay in the gasification pipeline for longer gasification reaction time compared with a direct-falling gasification reaction chamber in the prior art, improves the gasification efficiency, and ensures the advancing power of the biomass in the loop-shaped gasification pipeline by using the spiral pushing mechanism. And finally, a discharge boss 22 is arranged at the discharge end of the zigzag gasification pipeline, the discharge boss 22 is preferably arranged along the annular circumference of the inner wall of the discharge end, and the gasification residence time of the biomass material in the pipeline can be well controlled through the design of the discharge boss. Just the position of returning the shape gasification pipeline export to the bottom of vaporizer is formed with ejection of compact chamber, be provided with ejection of compact bottom plate 24, ejection of compact gate valve 25 in the ejection of compact chamber, arrange bottom plate 26 and arrange material gate valve 27, ejection of compact bottom plate 24 passes through ejection of compact gate valve 25 locking, only when the solid-state slag charge that falls into on ejection of compact bottom plate 24 exceedes predetermined weight, ejection of compact gate valve unblock, ejection of compact bottom plate 24 is opened, and the solid-state slag charge on the ejection of compact bottom plate 24 falls to arranging material bottom plate 26 on, and ejection of compact bottom plate kick-backs once more simultaneously and locks it once more through ejection of compact. And similarly, when the slag falling onto the discharging bottom plate 26 exceeds the preset weight, the discharging gate valve is unlocked, the discharging bottom plate is opened, and the slag is finally discharged. Through setting up the ejection of compact cavity of structure more can improve material gasification efficiency to guarantee that the gasification gas is fully discharged from the material output end of returning the shape gasification pipeline, make the gasification gas of mixing in solid-state slag charge fully release simultaneously.

The dust removal chamber is arranged above the gasification chamber, a plurality of air guide channels 15 are formed in the top of the gasification chamber, and the gasification chamber is communicated with the dust removal chamber through the air guide channels 15. The gasified gas just collected from the zigzag gasification pipeline is fully mixed with much dust, tar and the like, and the operation of removing dust and oil is needed to be carried out on the gasified gas. The invention initiatively integrates the dust removing chamber, the oil removing chamber and the gasification chamber together to form an independent unit. Be provided with dust removal net 13 in the clean room for filter the dust that carries in the gasification gas, the lateral wall of clean room is provided with operating door 14, operating door can be opened for change the operation to the dust removal net in the clean room, change after accomplishing the operating door is locked. The utility model discloses a cooling oil collection device, including dust removal chamber, deoiling chamber, toper cooling wall 8, collection oil bottom plate 9, toper cooling wall 8 is in collection oil bottom plate 9 top, just be in form the deoiling space between toper cooling wall 8 and the collection oil bottom plate 9, toper cooling wall 8 adopts the heat conduction material preparation, and preferred adoption metal preparation is provided with water-cooling structure (following) at the top of toper cooling wall and is used for continuously cooling down the toper cooling wall to predetermineeing the scope. The conical cooling wall 8 comprises a plurality of inverted conical funnels, each inverted conical funnel can be an inverted conical funnel or a pyramid funnel, the conical surface of each funnel is downwards opposite to the oil collecting bottom plate 9, and the funnel outlet of each funnel is upwards communicated with the gas collecting pipeline 5. An oil output door 10 is formed on the side wall of the oil removing chamber 7 and used for outputting oil gathered in the oil removing chamber. Grease trap room 7 and dust removal room 11 are through air duct 12 intercommunication, air duct 12 stretches into to the dust removal indoor downwards, air duct 12 upwards stretches into in the grease removal indoor, and the top of air duct 12 salient in album oil bottom plate 9 predetermined height, and the selection of this height need be guaranteed before carrying out the fluid output on the collection oil bottom plate, and the top of air duct 12 is higher than the fluid surface on album oil bottom plate 9 all the time. The gas guide pipe 12 is connected with the oil collecting bottom plate 9 in a sealing mode, preferably, the gas guide pipe 12 is of a structure with a funnel at the top end, and a gas guide straight pipe structure is arranged at the bottom. The condensing chamber 2 is arranged above the oil removing chamber 7, the condensing chamber 2 comprises a plurality of gas collecting pipelines 5, the bottom end of each gas collecting pipeline 5 is connected to a funnel top outlet of an inverted cone-shaped funnel structure corresponding to the oil removing chamber 7, the top end of each gas collecting pipeline 5 is communicated with the gas collecting chamber 1, the outer wall of each gas collecting pipeline 5 is correspondingly surrounded by one water cooling sleeve 6, namely, each gas collecting pipeline 5 is arranged in the corresponding water cooling sleeve 6, and continuous water cooling effect is provided for the gas collecting pipelines 5 through the water cooling sleeve 6. All water-cooling sleeves communicate each other, and the bottom of preferred each water-cooling sleeve communicates through a water-cooling chamber of intaking in common, the water-cooling chamber of intaking in common is the closed form plane water-cooling chamber of laying along the outer top surface of the toper stave 8 that removes the grease chamber, the water-cooling chamber of intaking in common communicates simultaneously and each water-cooling sleeve 6, and is formed with cooling water inlet 3 at the lateral wall of the water-cooling chamber of intaking in common, each water-cooling sleeve's top communicates each other through the intercommunication pipeline, and the intercommunication pipeline communicates in cooling water outlet 4 simultaneously, cooling water inlet 3 and the external water piping formula condensation saturated steam boiler device of cooling water outlet 4 form cold and hot water circulation system. Thus, the condensation chamber can provide cooling function for the oil removing chamber and the gas collecting pipeline at the same time, and tar components in gasified gas are cooled and filtered. The condensing chamber is provided with an air collection chamber 1 above, the air collection chamber is communicated with the top end of each air collection pipeline, gasified gas subjected to dust removal and oil removal treatment is collected through the air collection chamber, and a gasified gas output pipe 34 is connected to the air collection chamber and used for finally leading out the gasified gas generated by biomass gasification. A gasification agent chamber 33 can be preferably arranged above the gas collection chamber 1.

As shown in fig. 1, the water tube type condensation saturated steam boiler device included in the biomass gasification circulating system of the present invention includes a steam boiler 35, a heat exchange pipeline 36, a steam drum 37, a steam turbine 38, a water replenishing condenser 39, a booster pump 40, a deaerator 41, a booster pump 42, a dust collector 43, a heat carrier pipeline 44, a plurality of connecting pipelines and valves, a charging opening is opened at the top of the steam boiler 35, the heat exchange pipeline 36 is disposed in a steam generation chamber inside the steam boiler, the liquid inlet end of the heat exchange pipeline 36 is provided with the booster pump 42 for boosting the circulating water and the steam thereof entering the heat exchange pipeline, the booster pump 42 is connected to the cooling water outlet 4 of the atmospheric fixed bed biomass gasification furnace device through the connecting pipeline, the deaerator 41 and the valves are disposed on the connecting pipeline, and the water from the cooling water outlet 4 of the atmospheric fixed bed biomass gasification furnace device enters the heat exchange pipeline after safe deaerat The heat pipe 36 converts steam boiler heat into high pressure steam in the heat exchange pipe 36. The steam outlet end of the heat exchange pipeline 36 is provided with a steam drum 37 for adjusting and buffering steam pressure, the steam drum 37 is connected to the hot steam input end of a steam turbine 38 through a connecting pipeline with a valve, the steam turbine 38 is a rotary steam power device, high-temperature high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and the high-temperature high-pressure steam does work outwards. The power output end (steam rotor rotating shaft) of the steam turbine is in transmission connection with the central rotating shaft of the spiral pushing mechanism 29 of the normal-pressure fixed bed biomass gasification furnace device, so that the high-temperature and high-pressure steam heat energy from the heat exchange pipeline 36 is converted into the driving kinetic energy of the spiral pushing mechanism 29. The cold steam discharge end of the steam turbine 38 is connected to the input end of the water replenishing condenser 39 through a connecting pipeline with a valve, steam output after the steam turbine works is further condensed and is supplemented with necessary cold water through the water replenishing condenser 39, the output end of the water replenishing condenser 39 is output as condensed water, and the output end of the water replenishing condenser 39 is connected to the cooling water inlet 3 of the normal pressure fixed bed biomass gasification furnace device through the connecting pipeline with the valve, and the pipeline is provided with a booster pump 40 to meet the requirement of the cooling water circulation pressure of the normal pressure fixed bed biomass gasification furnace device. The bottom of the steam boiler 35 is communicated with the drying and preheating chamber 28 through a heat carrying pipeline 44, so that the heat carrying furnace gas of the steam boiler 35 is used for providing the heat necessary for drying and preheating for the drying and preheating chamber 28. A dust collector 43 is further arranged on the heat carrier pipeline 44 to remove necessary dust from the heat carrier gas and then enter the drying and preheating chamber 28, and a hot carrier gas outlet 30 based on pressure control is arranged at the bottom of the drying and preheating chamber 28 to balance the temperature and the pressure in the drying and preheating chamber 28 within a preset range.

The biomass gasification circulating system can gasify the biomass under normal pressure, effectively realize the cyclic utilization of heat energy and improve the gasification efficiency. When the biomass gasification furnace works, a biomass material is fed into the zigzag gasification pipeline through the feeding conveying mechanism, the biomass material entering the zigzag gasification pipeline is pushed by the spiral pushing mechanism, so that the biomass material can be conveyed along the zigzag gasification pipeline, a proper gasification agent (oxygen and/or water vapor) is selected and then directly provided into the biomass material through the first and second gasification agent pipelines, the biomass material and the first and second gasification agent pipelines are uniformly mixed in the conveying process of the biomass material, heat required by drying and gasification starting of the biomass material is provided for the drying and preheating chamber through the steam boiler, the preheating temperature can be independently controlled, the drying and preheating chamber is made of a heat insulation material, the heating effect can be ensured, and waste gas and waste heat of the drying and preheating chamber are discharged after the hot pressing control of the bottom of the drying and preheating chamber. When a biomass material enters a gasification chamber through a zigzag gasification pipeline, the gasification process is continuously maintained through heat generated by gasification oxidation reaction, the biomass material, oxygen, water vapor and the like generate fuel gas (such as hydrogen and carbon monoxide) and partial tar based on gasification mixed reaction, and carry some dust to be discharged into the gasification chamber from a bottom outlet of the zigzag gasification pipeline, the gasification mixed gas entering the gasification chamber enters a dust removal chamber through an air guide channel, enters an oil removal chamber through an air guide pipe after being subjected to dust removal by a dust removal net, the tar cooled by a conical cooling arm in the oil removal chamber is collected by an oil collection bottom plate, the gasification gas subjected to primary oil removal continuously enters a gas collection chamber through a condensation chamber, and is cooled again through the gas collection pipeline in the process of passing through the condensation chamber, and the residual tar component is condensed and reflowed into the oil collection chamber through the inner wall surface of the gas collection pipeline, gasified gas finally collected in the gas collecting chamber is output through a gasified gas output pipe, solid slag generated after biomass gasification in the zigzag gasification pipeline falls into the discharging bottom plate, a certain amount of slag is accumulated on the discharging bottom plate, the slag is opened and downwards continues to be output to the discharging bottom plate, waste slag is finally output through the discharging bottom plate, the gasified gas in the zigzag gasification pipeline can be fully released in the process of discharging the slag, and the efficient biomass gasification process is completed. Cooling water after condensing gasified gas is combined with heat driving circulation of the spiral pushing mechanism, cooling water discharged by a specific gasification furnace is conveyed to a pumping inlet end of a booster pump 42 through a cooling water outlet through a connecting pipeline, and enters a heat exchange pipeline 36 after being subjected to necessary pressurization and safe deoxidization, the cooling water is converted into high-temperature high-pressure hot steam in the heat exchange pipeline 36 and then is output to a steam turbine after being regulated by a steam pocket 37, the high-temperature high-pressure hot steam does work outwards through the steam turbine to drive the spiral pushing mechanism and provide driving power for rotation of the spiral pushing mechanism, the steam after the work of the steam turbine is further converted into condensed water through a water supplementing condenser 39, and finally the condensed water is provided to a cooling water inlet of a water cooling sleeve through the pipeline and the booster pump again, so that water cooling and heat driving circulation are realized, and the heat energy utilization efficiency is improved while the gasification. Furthermore, solid slag discharged from the gasification furnace can be supplemented into the steam boiler for combustion, so that the heat energy utilization efficiency is maximized.

The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any known modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention, and the specific protection scope of the present invention is subject to the description of the claims.

Claims

1. A biomass gasification and boiler steam circulation system is characterized by comprising a water pipe type condensation saturated steam boiler device and an atmospheric fixed bed biomass gasification furnace device, wherein the water pipe type condensation saturated steam boiler device provides preheating heat energy, material conveying power and circulating cooling water for the atmospheric fixed bed biomass gasification furnace device, and the atmospheric fixed bed biomass gasification furnace device is used for realizing atmospheric gasification of biomass; wherein the normal pressure fixed bed biomass gasification furnace device comprises: plenum chamber (1), condensation chamber (2), deoiling room (7), clean room (11), vaporizer (16), circle shape gasification pipeline (17), first gasifying agent pipeline (18), second gasifying agent pipeline (20), dry preheating chamber (28), spiral pushing equipment (29), feeding conveying mechanism (32) and gasifier room (33), dry preheating chamber (28) and vaporizer (16) set up side by side, circle shape gasification pipeline (17) set up simultaneously in dry preheating chamber (28) and vaporizer (16), be in the inside of the circle shape gasification pipeline in dry preheating chamber (28) is provided with spiral pushing equipment (29), feeding conveying mechanism (32) will be from the biomass material of feed inlet (31) to defeated for spiral pushing equipment (29), gasifying agent room (33) connect in first gasifying agent pipeline (18) and second gasifying agent pipeline (20), first gasification agent pipeline (18) pass behind spiral pushing equipment (29) it sets up to go back the central axis extending direction of shape gasification pipeline (17) along the inside of shape gasification pipeline (17), second gasification agent pipeline (20) are hugged closely the outer wall of shape gasification pipeline (17) is followed the outer wall extending direction setting of shape gasification pipeline (17) back, evenly distributed has a plurality of first gasification agent export (19) on first gasification agent pipeline (18), evenly distributed has a plurality of second gasification agent export (21) on second gasification agent pipeline (20), dust removal chamber (11) set up in gasification chamber (16) top, and with the gasification chamber intercommunication, oil removal chamber (7) set up in dust removal chamber (11) top, and with dust removal chamber (11) intercommunication, condensation chamber (2) set up in oil removal chamber (7) top, the gas collection chamber (1) is arranged above the condensing chamber (2), and the gas collection chamber (1) is communicated with the oil removal chamber (7) through a gas collection pipeline (5) penetrating through the condensing chamber (2).

2. The biomass gasification and boiler steam cycle system of claim 1, wherein the water tube condensing saturated steam boiler apparatus comprises: steam boiler (35), heat transfer pipeline (36), steam pocket (37), steam turbine (38), moisturizing condenser (39), first booster pump (40), oxygen-eliminating device (41), second booster pump (42) and a plurality of connecting line, heat transfer pipeline (36) set up in steam boiler (35), the input and the output of heat transfer pipeline (36) stretch out outside the steam boiler, the input of heat transfer pipeline (36) is provided with second booster pump (42), second booster pump (42) through connecting line connect in oxygen-eliminating device (41), oxygen-eliminating device (41) through connecting line connect in the condensation chamber of ordinary pressure fixed bed biomass gasification stove device, the output of heat transfer pipeline (36) is provided with steam pocket (37), steam pocket (37) through connecting line connect in the hot steam input of steam turbine (38), the cold steam discharge end of the steam turbine (38) is connected to the water supplementing condenser (39) through a connecting pipeline, the water supplementing condenser (39) is connected to the first booster pump (40) through a connecting pipeline, and the first booster pump (40) is connected to a condensing chamber of the normal-pressure fixed bed biomass gasification furnace device through a connecting pipeline; the steam power output end of the steam turbine (38) is in transmission connection with a spiral pushing mechanism (29) of the normal-pressure fixed bed biomass gasification furnace device; the steam boiler (35) is connected to a drying preheating chamber (28) of the atmospheric fixed bed biomass gasification furnace device through a heat transfer pipeline (44).

3. The biomass gasification and boiler steam circulation system according to claim 2, wherein the loop-shaped gasification pipeline (17) in the atmospheric fixed bed biomass gasification furnace device is formed by connecting two reverse U-shaped pipelines in series, the first U-shaped pipeline is opened upwards, the second U-shaped pipeline is opened downwards, and the first U-shaped pipeline and the second U-shaped pipeline share a U-shaped arm; the left U-shaped arm of the first U-shaped pipeline is positioned in the drying and preheating chamber (28), the spiral pushing mechanism (29) is arranged in the left U-shaped arm of the first U-shaped pipeline, the spiral pushing mechanism (29) comprises a central rotating shaft and a spiral blade arranged on the central rotating shaft, and the central rotating shaft is connected with a steam power output shaft of a steam turbine (38) in the water-tube type condensation saturated steam boiler device through a conveying belt; the discharge end of the feeding conveying mechanism (32) is aligned with the top opening of the left U-shaped arm of the first U-shaped pipeline, the drying and preheating chamber (28) preheats the biomass material entering the left U-shaped arm of the first U-shaped pipeline, and the spiral pushing mechanism (29) provides driving power for conveying the material in the zigzag gasification pipeline; one end of the first gasifying agent pipeline is connected to the gasifying agent chamber (33), the first gasifying agent pipeline (18) penetrates through a central rotating shaft of the spiral pushing mechanism (29) and then forms a loop-shaped pipeline structure in the loop-shaped gasifying pipeline (17) along the extension direction of the central axis of the loop-shaped gasifying pipeline (17), the other end of the first gasifying agent pipeline is a closed end and is arranged close to the discharge end of the loop-shaped gasifying pipeline (17), and the first gasifying agent outlets (19) are uniformly formed in the part of the first gasifying agent pipeline extending out of the central rotating shaft; one end of the second gasification agent pipeline is connected to the gasification agent chamber (33), the second gasification agent pipeline is an outer sleeve which is arranged to cover the outer wall of the zigzag gasification pipeline or is a zigzag pipeline structure which is arranged along the extension direction of the outer wall of the zigzag gasification pipeline (17), and the other end of the second gasification agent pipeline is a closed end and is arranged close to the discharge end of the zigzag gasification pipeline (17); the second U-shaped pipeline of the loop-shaped gasification pipeline (17) is completely positioned in the gasification chamber.

4. The biomass gasification and boiler steam cycle system of claim 3, wherein the first gasifying agent outlet and the second gasifying agent outlet are one-way gas discharge holes arranged along the material propelling direction; a discharge boss (22) is arranged at the discharge end of the zigzag gasification pipeline; the utility model discloses a gasification furnace, including gasification chamber, discharge bottom plate (24), ejection of compact gate valve (25), row's bottom plate (26) and row's material gate valve (27), the gasification chamber just is provided with ejection of compact chamber to the position of returning shape gasification pipeline discharge end, be provided with ejection of compact bottom plate (24), ejection of compact gate valve (25) in the ejection of compact chamber, arrange bottom plate (26) and arrange material gate valve (27), ejection of compact bottom plate (24) carry out switching control through ejection of compact gate valve (25), when the slag charge that falls into on ejection of compact bottom plate (24) reaches preset weight, the slag charge falls into on arranging material bottom plate (26) after, ejection of compact gate valve control ejection of compact bottom plate is closed, arrange material gate valve control bottom plate (26) and open switching control through row material gate valve (27) row, when the slag charge that falls.

5. The biomass gasification and boiler steam circulation system according to claim 4, wherein a plurality of air guide channels (15) are formed in the top of the gasification chamber, the gasification chamber is communicated with the dust removal chamber through the air guide channels (15), a dust removal net (13) is arranged in the dust removal chamber, and an operation door (14) is arranged on the side wall of the dust removal chamber.

6. The biomass gasification and boiler steam circulation system according to any one of claims 3 to 5, wherein the degreasing chamber (7) in the atmospheric pressure fixed bed biomass gasification furnace device comprises a conical cooling wall (8) and an oil collecting bottom plate (9), the conical cooling wall (8) is located above the oil collecting bottom plate (9), and an oil removing space is formed between the conical cooling wall (8) and the oil collecting bottom plate (9), the top of the conical cooling wall (8) is provided with a cooling structure, the conical cooling wall (8) comprises a plurality of inverted conical funnel structures, the conical surface of each inverted conical funnel structure faces downwards to the oil collecting bottom plate (9), the funnel outlet of each inverted conical funnel structure is communicated upwards with the gas collecting pipeline (5), and the side wall of the degreasing chamber (7) is formed with an oil output door (10), grease trap room (7) and clean room (11) are through air duct (12) intercommunication, air duct (12) stretch into downwards in the clean room, upwards stretch into to the deoiling indoor, and the top of air duct (12) is outstanding in gathering oil bottom plate (9) predetermined height, sealing connection between air duct (12) and gathering oil bottom plate (9).

7. The biomass gasification and boiler steam circulation system according to claim 6, wherein the condensation chamber (2) in the atmospheric pressure fixed bed biomass gasification furnace device comprises a plurality of gas collecting pipelines (5), the bottom end of each gas collecting pipeline (5) is connected to the funnel outlet of a corresponding inverted cone funnel structure in the oil removal chamber (7), the top end of each gas collecting pipeline (5) is communicated with the gas collection chamber (1), the outer wall of each gas collecting pipeline (5) is correspondingly surrounded by a water cooling sleeve (6), the bottom ends of the water cooling sleeves are communicated through a common water inlet cooling cavity, the common water inlet cooling cavity is a closed planar water cooling cavity laid along the outer top surface of the conical cooling wall (8) of the oil removal chamber, the common water inlet cooling cavity is simultaneously communicated with the water cooling sleeves (6), and a cooling water inlet (3) is formed on the side wall of the common water inlet cooling cavity, the top of each water-cooling sleeve is communicated with each other through a water outlet communication pipeline, the water outlet communication pipeline is connected to a cooling water outlet (4), a cooling water inlet (3) is connected to a first booster pump (40) in the water pipe type condensation saturated steam boiler device through a connecting pipeline, and the cooling water outlet (4) is connected to a deaerator (41) in the water pipe type condensation saturated steam boiler device through a connecting pipeline.

8. The biomass gasification and boiler steam cycle system according to claim 7, wherein the gas collection chamber is communicated with the top end of each gas collection pipeline, and a gasification gas output pipe (34) is connected to the gas collection chamber; the connecting pipeline is provided with a valve, the heat-carrying pipeline (44) is provided with a dust remover (43), and the drying and preheating chamber (28) is provided with a hot carrier gas outlet (30) which is opened and closed based on hot-pressing control.