Production line for tail smoke treatment of carbonization kiln and co-production of wood biomass and organic matters

Abstract

The utility model belongs to the field of biomass carbonization equipment, and particularly relates to a production line for tail smoke treatment of a carbonization kiln and co-production of wood biomass and organic matters. The tail smoke treatment production line comprises dust removal equipment connected to the tail end of the rotary kiln and further comprises a diverter valve, the diverter valve at least comprises an inlet and two outlets, the first inlet is connected to a discharging pipe of the dust removal equipment, and the first outlet and the second outlet are used for being connected with a circulation pipeline and a separation pipeline respectively. The tail end of the circulating pipeline is communicated to a combustion chamber at the front end of the rotary kiln through a flue gas buffer device; and multi-stage separation equipment and collection equipment are arranged on the circulating pipeline. The production line for co-production of the wood biomass and the organic matter comprises a carbonization kiln, the kiln comprises a combustion chamber arranged at the kiln head and a rotary kiln, the rotary kiln comprises a middle kiln body part, a discharge port located at the kiln head and a feed port located at the kiln tail, the kiln tail is further provided with a smoke exhaust port, and the smoke exhaust port is connected with the tail smoke treatment system. By carbonizing the wood biomass and treating the tail smoke, a plurality of organic matters are obtained, the cost consumption is reduced, and the benefit is increased by recycling the wood biomass.

Description

Technical Field

[0001] The utility model belongs to the field of biomass carbonization equipment, and specifically relates to a production line for treating tail smoke of a carbonization kiln and co-producing organic matter from wood biomass. Background Art

[0002] The process of slowly decomposing biomass under limited oxygen or complete lack of oxygen to produce solid char products. In addition to solid char products, combustible gases and liquids are also produced. Mainly include tar, wood vinegar, and wood gas.

[0003] Tar can be used as fuel, chemical raw materials, carbon materials, etc., and wood vinegar can be used as water-soluble fertilizer, etc.

[0004] Chinese invention CN201010287261.8 discloses a biochar, gas, oil and wood vinegar co-production system and co-production method. The technical problem to be solved is to provide a biochar, gas, oil and wood vinegar co-production system with reasonable design, convenient processing and manufacturing, simple installation and layout, easy operation and good use effect.

[0005] The technical solution includes a biomass retort, a high-temperature heating furnace, a water cooling device, a water washing device, a liquid separation device for separating wood vinegar and wood tar in the mixed liquid separated by the water cooling device, a gas storage tank, a water ring vacuum pump and a compressor, and a wood tar storage tank and a wood vinegar storage tank; its joint production method includes the following steps: 1. Loading; 2. High-temperature carbonization: water cooling and gas-liquid separation, water washing, gas storage and liquid separation and storage; 3. High-temperature carbonization is completed to obtain biochar. The biochar, gas, oil and wood vinegar joint production system used in the present invention is reasonably designed, easy to process and manufacture, simple to install and lay out, easy to use and operate, and has good use effect. The joint production method used is easy to implement, has high output, low investment cost, fast joint production speed, and high product purity.

[0006] However, in the above-mentioned prior art, although the flue gas discharged from the retort is circulated with the high-temperature furnace through the vent pipe to supplement the heat source in the high-temperature furnace, it is difficult to achieve effective circulation by only relying on the vent valve to control the flue gas flow rate. The flue gas directly enters the high-temperature furnace without any treatment process, which may cause the temperature in the furnace to change too quickly due to the pressure and be difficult to achieve effective control, and cause blockage due to the large amount of dust, so it is easy to have a high failure rate;

[0007] Even if the treated wood gas is introduced into the blast furnace as in the prior art, it cannot provide a good heating effect due to the limited calorific value of the wood gas.

[0008] Moreover, in the prior art, the implementation process of "after the high-temperature carbonization process of the grass raw materials in the biomass retort in step one is completed, the vacuum control valve is closed and the high-temperature heating furnace is closed, and the biomass retort is lifted out of the high-temperature heating furnace by a lifting equipment, and after the biomass retort is cooled to room temperature, the biomass retort is opened to obtain the biomass charcoal after high-temperature carbonization, thereby completing the co-production process of biomass charcoal, gas and oil." is difficult to achieve continuous production, which not only affects the production efficiency but also faces the cost of stopping the furnace. Utility Model Content

[0009] Technical problem: Based on the above-mentioned existing technologies, the technical problem to be solved by this application is that, during the carbonization of wood biomass using a rotary kiln, a portion of the tail gas is initially treated and reused to supplement the combustion calorific value requirements of the combustion chamber to save external heat sources, and the remaining tail gas is separated step by step to obtain various types of organic matter precipitation for waste utilization.

[0010] Technical solution: In order to solve the above technical problems, the present application provides a new technical solution: a carbonization kiln tail smoke treatment production line, including a dust removal device connected to the tail end of a rotary kiln, and also including a diverter valve, the diverter valve includes at least one inlet and two outlets, the first inlet is connected to the discharge pipe of the dust removal device, the first outlet and the second outlet are respectively used to connect the circulation pipeline and the separation pipeline, and the end of the circulation pipeline is connected to the combustion chamber at the front end of the rotary kiln through a flue gas buffer device;

[0011] The circulation pipeline is connected to the first outlet of the diverter valve and is connected to the combustion chamber at the front end of the rotary kiln furnace through the flue gas buffer device;

[0012] The dust removal equipment located at the tail end of the rotary kiln is used to remove particulate matter and pollutants in the flue gas at the tail end of the furnace, and to perform preliminary treatment on the flue gas to be circulated; the flue gas at the tail end of the furnace that has undergone preliminary treatment is recycled to supplement the calorific value demand of the combustion chamber, thereby saving external heat sources;

[0013] The flue gas buffer device realizes a stable supply of flue gas to the combustion chamber, reduces drastic temperature changes, and makes carbonization more stable.

[0014] The separation pipeline is connected to the second outlet of the diverter valve for processing the remaining flue gas. Multi-stage separation equipment is set on the separation pipeline, which can gradually separate the organic matter and other valuable components in the flue gas. The separated organic matter can be used as waste, such as for the production of fertilizers, biomass fuels, etc.

[0015] The function of the diverter valve is to divert a part of the flue gas at the furnace tail to the circulation pipeline and the separation pipeline to achieve the diversion treatment of the flue gas.

[0016] Furthermore, a first scrubbing chamber is provided between the first inlet and the dust removal device, and the flue gas at the furnace tail is scrubbed and then introduced into the combustion chamber.

[0017] Furthermore, the smoke buffer device includes a smoke buffer tank, which includes a smoke inlet and a plurality of smoke outlets, and the smoke outlets are connected to the combustion chamber.

[0018] Furthermore, at least one section of the outer wall of the circulation pipeline is provided with a steam heating pipe, thereby reducing the occurrence of condensation caused by a sudden drop in the flue gas temperature in the circulation pipeline.

[0019] Furthermore, the circulation pipeline has at least one section of built-in spray pipe to perform dust reduction treatment again.

[0020] Furthermore, one or more of a second air washing chamber, an opening and closing valve, and a first induced draft fan are also provided between the starting end and the end of the circulation pipeline. The opening and closing valve can be closed to inspect and repair the blockage and other faults of the middle spray pipeline.

[0021] Furthermore, an opening and closing valve and a first induced draft fan are sequentially arranged between the starting end and the end of the circulation pipeline, and a spray pipeline is arranged between the first outlet and the opening and closing valve.

[0022] Furthermore, a second induced draft fan is arranged on the separation pipeline near its end, and one or more separation equipments selected from the group consisting of a third gas scrubber, a primary condenser, a secondary condenser, an electric coke collector oiler, and a tertiary condenser are arranged between the starting end of the separation pipeline and the second induced draft fan;

[0023] The collecting equipment includes one or more of a tar collecting tank, a wood vinegar collecting tank, and a wood gas recovery and processing section. Through these multi-stage separation equipment, the tar and the wood vinegar are initially separated. The mixed liquid can be finely separated.

[0024] Furthermore, the first scrubbing chamber, the second scrubbing chamber and the third scrubbing chamber all include a spray scrubbing tower, and the spray medium of the spray scrubbing tower is the same as at least one component in the tail smoke. In the prior art, scrubbing is performed by spraying water, which adds a subsequent distillation and water removal process.

[0025] Furthermore, the spraying medium is a crude wood vinegar liquid contained in a tank, and the spraying medium is transported through a pipeline arranged between the tank and the spray scrubbing tower. Directly using wood vinegar for scrubbing can ensure the concentration of the produced wood vinegar.

[0026] The present application also provides a production line for the co-production of organic matter from wood biomass, including a carbonization kiln, the kiln including a combustion chamber arranged at the kiln head and a rotary kiln, the rotary kiln including a middle kiln body part and a discharge port located at the kiln head and a feed port at the kiln tail, and a smoke exhaust port is also provided at the kiln tail, and the smoke exhaust port is connected to the above-mentioned tail smoke treatment system.

[0027] The beneficial effects of the utility model are:

[0028] 1. The production line processes the flue gas at the furnace tail through dust removal equipment and / or air washing chamber to effectively remove particulate matter. At the same time, by recycling the flue gas at the furnace tail after preliminary treatment, it reduces dependence on external heat sources, reduces energy consumption, and has the environmental benefits of energy saving and emission reduction.

[0029] 2. The multi-stage separation equipment installed on the separation pipeline can gradually separate the organic matter and other valuable components in the flue gas at the furnace tail, such as tar and wood vinegar. It can be used for waste utilization, such as producing fertilizers, biomass fuels, etc., to achieve resource recovery and reuse.

[0030] 3. The use of flue gas buffer device can stabilize the flue gas supply to the combustion chamber and reduce the drastic temperature changes. It can make the carbonization process more stable and improve production efficiency and product quality.

[0031] 4. The opening and closing valves, air washing chambers and other equipment installed in the production line facilitate the inspection and maintenance of the spray pipes and separation pipelines, improving the convenience of operation.

[0032] 5. By directly using wood vinegar as the spraying medium for gas washing, the concentration of the produced wood vinegar can be guaranteed, avoiding the subsequent distillation and water removal process, and improving the output efficiency of the wood vinegar.

[0033] 6. The production line of woody biomass co-production of organic matter achieves efficient utilization of biomass by treating organic matter such as fruit shells and cotton stalks through dry distillation and carbonization and oil and gas recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall schematic diagram of the first embodiment of the utility model;

[0035] Figure 2 This is an overall schematic diagram of the second embodiment of the utility model;

[0036] Figure 3 It is an overall schematic diagram of the third embodiment of the present utility model.

[0037] In the figure: 1. combustion chamber; 2. rotary kiln; 3. discharge port at the kiln head; 4. feed port at the kiln tail; 5. screw feeder; 6. air shut-off valve; 7. secondary angle belt; 8. screw propeller; 9. iron mesh silo; 10. primary angle belt; 11. loading silo; 12. water jacket screw machine; 13. activated carbon cooler; 14. dust collector; 15. diverter valve; 16. first inlet; 17. first outlet; 18. second outlet; 19. circulation pipeline; 20. separation pipeline; 21. flue gas buffer device; 22. steam tracing pipe; 23. spray pipeline; 24. electric gate valve; 25. first induced draft fan; 26. second induced draft fan; 27. third scrubber; 28. primary condenser; 29. ​​electric tar collector; 30. third condenser; 31. second scrubber; 32. first scrubber. DETAILED DESCRIPTION Example

[0038] Reference Figure 1 A production line for the co-production of organic matter from wood biomass includes a carbonization kiln. The kiln includes a combustion chamber arranged at a kiln head and a rotary kiln. The rotary kiln includes a kiln body part in the middle and a discharge port located at the kiln head and a feed port at the kiln tail. A smoke exhaust port is also arranged at the kiln tail, and the smoke exhaust port is connected to a tail smoke treatment system.

[0039] The feed port at the tail of the kiln is connected to a screw feeder, a shut-off valve is provided at the feed port of the screw feeder, and the material is transported through a secondary angle belt. The upper feeding mechanism includes a screw propeller, an iron mesh silo, a primary angle belt and an upper silo in sequence.

[0040] The discharge port of the kiln head is connected to the water jacket screw conveyor for cooling and conveying. The end is also equipped with a closed air valve, and then connected to the activated carbon cooler for discharge. The activated carbon cooler consists of the following main components:

[0041] Cooling medium: usually water or other cooling liquid, used to reduce the temperature of activated carbon by heat transfer. The cooling medium can contact with the activated carbon through cooling pipes or spray devices, absorb heat and take away part of the heat energy.

[0042] Cooling pipe: used to transfer the cooling medium to the surface of the activated carbon to achieve heat transfer and absorption. The cooling pipe is usually arranged inside or outside the activated carbon layer to ensure that the cooling medium is in full contact with the activated carbon to achieve an effective cooling effect.

[0043] Cooling fan or pump: used to circulate the cooling medium, take away the heat and keep the cooling medium flowing to improve the cooling effect.

[0044] Control system: used to monitor and control the temperature, flow and other parameters of the activated carbon cooler. Through the control system, automatic adjustment and stable cooling operation can be achieved to ensure that the temperature of the activated carbon is within the appropriate range.

[0045] The tail smoke treatment production line includes a dust collector connected to the tail end of the rotary kiln in sequence, and also includes a diverter valve, the diverter valve includes an inlet and two outlets, the first inlet is connected to the discharge pipe of the dust collector, the first outlet and the second outlet are respectively used to connect the circulation pipeline and the separation pipeline, the circulation pipeline is connected to the first outlet of the diverter valve, and the end thereof is connected to the combustion chamber at the front end of the rotary kiln through the flue gas buffer device;

[0046] The dust collector located at the tail end of the rotary kiln is used to remove particulate matter and pollutants in the flue gas at the tail end of the furnace, and to perform preliminary treatment on the flue gas to be circulated; the flue gas at the tail end of the furnace that has undergone preliminary treatment is recycled to supplement the calorific value demand of the combustion chamber, thereby saving external heat sources;

[0047] The flue gas buffer device realizes a stable supply of flue gas to the combustion chamber, reduces drastic temperature changes, and makes carbonization more stable.

[0048] The separation pipeline is connected to the second outlet of the diverter valve for processing the remaining flue gas. Multi-stage separation equipment is set on the separation pipeline, which can gradually separate the organic matter and other valuable components in the flue gas. The separated organic matter can be used as waste, such as for the production of fertilizers, biomass fuels, etc.

[0049] The function of the diverter valve is to divert a part of the flue gas at the furnace tail to the circulation pipeline and the separation pipeline to achieve the diversion treatment of the flue gas.

[0050] The smoke buffer device includes a smoke buffer tank, which includes a smoke inlet and 8 smoke outlets, and the smoke outlets are connected to the combustion chamber.

[0051] A steam heating pipe is installed on the outer wall of the circulation pipeline to reduce the occurrence of condensation caused by a sudden drop in the flue gas temperature in the circulation pipeline.

[0052] A spray pipe is built into the circulation pipeline for dust reduction treatment again. An electric gate valve and a first induced draft fan are arranged in sequence between the starting end and the end of the circulation pipeline, and the spray pipe is arranged between the first outlet and the electric gate valve.

[0053] A second induced draft fan is arranged near the end of the separation pipeline, and a third scrubber, a primary condenser (high temperature condensation, mainly collecting tar and a small amount of wood vinegar), an electric tar collector (collecting the remaining tar as much as possible), and a third condenser (collecting wood vinegar) are arranged in sequence between the starting end of the separation pipeline and the second induced draft fan; the temperature decreases from high to low in sequence. In a specific embodiment, those skilled in the art may also replace the electric tar collector with a secondary condenser.

[0054] The collection equipment includes a tar collection tank, a wood vinegar collection tank, and a wood gas recovery and processing section. The collection port of the tar collection tank is connected to the first condenser and the liquid outlet pipe of the electric tar collector, the wood vinegar collection tank is connected to the third-stage condenser, and the wood gas recovery and processing section can be a steam generating boiler to provide heating steam and other required steam for the entire production line.

[0055] Through these multi-stage separation equipment, tar and wood vinegar are initially separated, and their mixed liquid can be finely separated. Example

[0056] Reference Figure 2 : Embodiment 2 is substantially the same as Embodiment 1. Compared with Embodiment 1, its distinguishing technical feature is that a second air washing chamber and a first induced draft fan are sequentially arranged between the starting end and the end end of the circulation pipeline. Example

[0057] Reference Figure 3 : Embodiment 3 is substantially the same as Embodiment 1, and compared with Embodiment 1, its distinguishing technical feature is that the outlet of the dust collector is connected to the first scrubbing chamber, and the rear end of the first scrubbing chamber is connected to the first inlet of the diverter valve. The flue gas at the furnace tail is scrubbed and then introduced into the combustion chamber.

[0058] A first induced draft fan is also arranged between the starting end and the end of the circulation pipeline.

[0059] The above are only preferred specific implementation methods of the present invention.

[0060] The first scrubbing chamber, the second scrubbing chamber, and the third scrubbing chamber involved in all embodiments of the present application all include a spray scrubbing tower.

[0061] The spray scrubber consists of the following main components:

[0062] Nozzle system: used to spray the spray liquid evenly into the gas flow. The nozzle is usually located at the top of the scrubber. By setting the appropriate nozzle layout and nozzle aperture, it is ensured that the spray liquid can fully cover and contact the gas flow.

[0063] Tower body: The main structure of the spray scrubber, usually in a vertical barrel or cylindrical shape. The tower body usually includes fillers or baffles to increase the contact area, enhance gas-liquid exchange and pollutant adsorption.

[0064] Liquid circulation system: used to circulate the spray liquid to the nozzle system to ensure continuous spraying and washing effects. The system usually includes a liquid storage tank, a pump and a pipeline network.

[0065] Outlet emission system: discharges the treated gas from the scrubber, usually connected to subsequent treatment equipment or emission system through an exhaust pipe.

[0066] The spraying medium of the spray scrubber is the same as at least one component in the tail smoke. In the prior art, water spraying is used for scrubbing, which adds a subsequent distillation and water removal process.

[0067] The spraying medium is the crude wood vinegar liquid contained in the tank body, and the spraying medium is transported through the pipeline arranged between the tank body and the spray scrubbing tower. Directly using wood vinegar for scrubbing can ensure the concentration of the produced wood vinegar.

[0068] The "connection" and "sequential connection" involved in this application include direct pipe connection, sealing ring connection, etc. The connection method of the flue gas treatment equipment is to use the flue gas flow direction as a reference direction, and the smoke inlet end and the smoke outlet end are connected through pipes.

[0069] The loading and unloading sequence of the solid materials involved can be connected by a person skilled in the art using the existing inlet and outlet connection method of the equipment with reference to the feeding direction.

[0070] The equipment involved may be arranged in the manner listed in the accompanying drawings, or in other manners.

[0071] Those skilled in the art may refer to the disclosed prior art to implement the temperature conditions involved.

Claims

1. A carbonization kiln tail smoke treatment production line, characterized in that: It includes a dust removal device connected to the rear end of the rotary kiln, and also includes a diverter valve, the diverter valve includes at least one inlet and two outlets, the first inlet is connected to the discharge pipe of the dust removal device, the first outlet and the second outlet are respectively used to connect the circulation pipeline and the separation pipeline, and the end of the circulation pipeline is connected to the combustion chamber at the front end of the rotary kiln through the flue gas buffer device; The circulation pipeline is provided with multiple stages of separation equipment and collection equipment.

2. A carbonization kiln tail smoke treatment production line as claimed in claim 1, characterized in that: A first air washing chamber is also provided between the first inlet and the dust removal equipment, and the first air washing chamber includes a spray air washing tower.

3. A carbonization kiln tail smoke treatment production line as claimed in claim 2, characterized in that: The smoke buffer device includes a smoke buffer tank, and the smoke buffer tank includes a smoke inlet and a plurality of smoke outlets, and the smoke outlets are connected to the combustion chamber.

4. A carbonization kiln tail smoke treatment production line as claimed in claim 3, characterized in that: At least one section of the outer wall of the circulation pipeline is provided with a steam heating pipe; The circulation pipeline has at least one section of built-in spray pipeline.

5. A carbonization kiln tail smoke treatment production line as claimed in claim 4, characterized in that: A second air washing chamber, an opening and closing valve, and one or more of the first induced draft fan are also arranged between the starting end and the end of the circulation pipeline, and the second air washing chamber includes a spray air washing tower.

6. A carbonization kiln tail smoke treatment production line as claimed in claim 5, characterized in that: The opening and closing valve and the first induced draft fan are sequentially arranged between the starting end and the end of the circulation pipeline, and the spray pipeline is arranged between the first outlet and the opening and closing valve.

7. A carbonization kiln tail smoke processing production line as claimed in claim 3, characterized in that: A second induced draft fan is arranged near the end of the separation pipeline, and one or more separation equipment selected from the group consisting of a third scrubber, a primary condenser, a secondary condenser, an electric coke collector oiler, and a tertiary condenser is arranged between the starting end of the separation pipeline and the second induced draft fan; The third scrubbing chamber includes a spray scrubbing tower; The collecting equipment includes one or more of a tar collecting tank, a wood vinegar collecting tank, and a wood gas recovery and processing section.

8. A carbonization kiln tail smoke treatment production line as described in any one of claims 5 to 7, characterized in that: The spraying medium of the spray scrubbing tower is the same as at least one component in the tail smoke.

9. A carbonization kiln tail smoke treatment production line as claimed in claim 8, characterized in that: The spray medium is a crude wood vinegar liquid contained in a tank body, and the spray medium is transported through a pipeline arranged between the tank body and the spray scrubbing tower.

10. A production line for co-producing organic matter from woody biomass, comprising a carbonization kiln, wherein the kiln comprises a combustion chamber arranged at a kiln head and a rotary kiln, wherein the rotary kiln comprises a kiln body in the middle, a discharge port at the kiln head, and a feed port at the kiln tail, wherein a smoke exhaust port is also arranged at the kiln tail, and wherein: The smoke exhaust port is connected to the tail smoke processing production line described in claim 9.

Images