CN110657645A - Method for directly utilizing crop straw gasification combustion to bake grain - Google Patents
Method for directly utilizing crop straw gasification combustion to bake grain Download PDFInfo
- Publication number
- CN110657645A CN110657645A CN201910527031.5A CN201910527031A CN110657645A CN 110657645 A CN110657645 A CN 110657645A CN 201910527031 A CN201910527031 A CN 201910527031A CN 110657645 A CN110657645 A CN 110657645A
- Authority
- CN
- China
- Prior art keywords
- straw
- drying tower
- straws
- fuel
- grain
- Prior art date
Links
- 239000010902 straw Substances 0.000 title claims abstract description 84
- 238000002485 combustion reactions Methods 0.000 title claims description 20
- 238000002309 gasification Methods 0.000 title claims description 11
- 238000001035 drying Methods 0.000 claims abstract description 39
- 239000000446 fuels Substances 0.000 claims abstract description 35
- 210000000078 Claw Anatomy 0.000 claims description 10
- 239000003570 air Substances 0.000 claims description 9
- 239000007789 gases Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005235 decoking Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims 2
- 238000000034 methods Methods 0.000 abstract description 8
- 238000004642 transportation engineering Methods 0.000 abstract description 3
- -1 and is disorderly Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 240000000218 Cannabis sativa Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
Abstract
Description
Technical Field
The invention relates to the technical field of straw gasification combustion, in particular to a method for directly utilizing crop straw gasification combustion to bake grain.
Background
With the development of society, the straw recycling, gasifying and burning is widely popularized, but the straw recycling, gasifying and burning process has several difficulties in the use process of directly utilizing and fueling the straw: 1. the crop straws are large in volume, light in weight, difficult to transport and store, difficult to store and easy to cause fire; 2. the straws are uneven and disorderly, and the straws have no weight and cannot fall down naturally, so that uniform and accurate blanking is difficult to realize and the stable furnace temperature is kept; 3. because the crop straws, particularly the corn straws, contain high sugar and tar, and are also provided with soil and impurities, the straws are easy to coke and agglomerate in the combustion process in a fire box, and the furnace is dead.
Disclosure of Invention
The invention aims to provide a method for directly utilizing crop straws to gasify, burn and bake grains, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a method for directly utilizing crop straws to gasify and burn and bake grains comprises the following steps: step one, building a grain drying tower; secondly, feeding and crushing; step three, spiral blanking; step four, burning and gasifying; step five, drying by a drying tower;
in the first step, a grain baking and drying tower is built in a field far away from the village according to needs, and straw crushers, conveying belts, fuel gasifiers and the like are correspondingly erected around the grain baking and drying tower;
in the second step, straws on a farmland are clamped by the straw grab and transported to be thrown into a disc rotating hopper of the straw crusher, and the straws are crushed and broken by the operation of the straw crusher to obtain straw fuel;
in the third step, the straw fuel obtained in the second step is put on a first conveying belt of the dry tower equipment, the straw is conveyed to a large hopper through the first conveying belt, the fuel is conveyed to a second conveying belt through a first spiral auger feeder in the large hopper, and then the fuel is conveyed to a feed opening at the top end of a burner through the second conveying belt and is pushed into a fuel gasification furnace through a second spiral auger feeder for combustion and gasification;
in the fourth step, the combustible gas obtained in the third step is sprayed into a combustion chamber for full combustion through the work of a blower on the drying tower equipment, flame generated by combustion enters a heat exchanger for treatment, head flame is exchanged into hot gas, and then hot air is sent into the drying tower through a hot air pipe by an induced draft fan;
and in the fifth step, the grain to be dried is filled in the drying tower, the drying tower which works through the heat exchange in the fourth step is used for baking and drying the grain, and the grain is bagged and stored after being dried.
According to the technical scheme, the transportation distance from the baking drying tower constructed in the step one to the straws is within two kilometers and three kilometers.
According to the technical scheme, the size of the straw fuel after the straw is crushed by the crusher in the second step is 20 centimeters.
According to the technical scheme, the hot air generated in the fourth step is processed by the heat exchanger and then is dedusted by the gravity deduster.
According to the technical scheme, the fuel gasifier in the third step is a fixed grate burner or a movable chain grate burner.
According to the technical scheme, a claw-raking type decoking device is additionally arranged at the bottom of the fuel gasifier in the third step, 3-7 steel claws are arranged in each gap of the furnace bridge, the long claw rakes extending out of the hearth for 20 cm are connected to a connecting rod of the claw raking device, and are connected with a belt pulley through a connecting rod, and a variable frequency motor and a control speed regulator are arranged on the claw raking device.
Compared with the prior art, the invention has the following beneficial effects: the method for baking the grain by gasifying and burning the straw has the advantages that the process is simple and beneficial to operation, the steps of the method are perfected, the distance between the grain baking dry tower and the straw is controlled in the process, the straw transportation cost is not too high, the straw can be stacked on the ground after being packaged, and the problems of difficult stacking and fire disaster are avoided; through the straw crusher and the automatic blanking structure, the problems that the straws are uneven and disorderly, and the straws have no weight and cannot fall naturally, so that uniform and accurate blanking is difficult to realize are solved; the problems that straws are easy to coke in the combustion process of the straw boxes and the straws are caked to cause furnace death are solved, and the straw box is beneficial to baking and drying later-period grains.
Drawings
FIG. 1 is a flow chart of a method for baking grains by gasifying and burning straws.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a method for directly utilizing crop straws to gasify and burn and bake grains comprises the following steps: step one, building a grain drying tower; secondly, feeding and crushing; step three, spiral blanking; step four, burning and gasifying; step five, drying by a drying tower;
in the first step, a grain baking and drying tower is built in a field far away from the village according to needs, and straw crushers, conveying belts, fuel gasifiers and the like are correspondingly erected around the grain baking and drying tower; the transport distance from the baking dry tower built in the step one to the straws is within two kilometers and three kilometers, so that the straw transport cost is not too high, the straws can be stacked on the ground after being packaged, and the straws are not required to be stacked in a production field, and the problems of difficult stacking and fire disaster are avoided;
in the second step, straws on a farmland are clamped by the grass grasping machine and transported to be thrown into a disc rotating hopper of the straw crusher, the straws are crushed by the straw crusher to obtain straw fuel, and the size of the straw fuel after the straws are crushed by the crusher in the second step is 20 centimeters;
in the third step, the straw fuel obtained in the second step is put on a first conveying belt of the dry tower equipment, the straw is conveyed to a large hopper through the first conveying belt, the fuel is conveyed to a second conveying belt through a first spiral auger feeder in the large hopper, and then the fuel is conveyed to a feed opening at the top end of a burner through the second conveying belt and is pushed into a fuel gasification furnace through a second spiral auger feeder for combustion and gasification; aiming at the problems that straws are fluffy and light and the fuel is difficult to control and accurately put, the automatic blanking structure can automatically, accurately and uniformly put the fuel into the furnace, a temperature controller is used for controlling the feeding amount, the furnace temperature is controlled according to the feeding amount, the trial run effect is good, and the error between the furnace temperature and the set temperature does not exceed three degrees from top to bottom; in the third step, the fuel gasifier selects a fixed grate combustor; a claw-raking type decoking device is additionally arranged at the bottom of the fuel gasifier in the third step, 3-7 steel claw rakes are arranged in each gap of the furnace bridge, and extend out of the hearth for 20 cm, long claw rakes are connected to a connecting rod of the claw raking device, and are connected with a belt pulley through a connecting rod, and a variable frequency motor and a control speed regulator are arranged on the claw raking device; when the boiler works, the claw rakes are slowly pushed and pulled to stir at the bottom layer of the fuel pile, or a movable chain grate furnace bridge burner is adopted, a circularly moving chain grate furnace bridge is arranged at the bottom of a hearth, and after straw fuel is fully combusted through the slow movement of the chain grate furnace bridge, the slag is moved out of a combustion area, so that the aim of removing slag is fulfilled, the fuel is fully combusted, the condition and the environment of fuel coking and caking are damaged, and the slag is smoothly discharged. The furnace can burn any formed and non-formed biomass fuel, and has good effect;
in the fourth step, the combustible gas obtained in the third step is sprayed into a combustion chamber for full combustion through the work of a blower on the drying tower equipment, flame generated by combustion enters a heat exchanger for treatment, head flame is exchanged into hot gas, and then hot air is sent into the drying tower through a hot air pipe by an induced draft fan; the hot air generated in the fourth step is processed by a heat exchanger and then is dedusted by a gravity deduster;
in the fifth step, the grain to be dried is filled in the drying tower, the drying tower which works through heat exchange in the fourth step is used for baking and drying the grain, and the grain is bagged and stored after being dried;
the comparison table of the crop straw gasification combustion grain baking and the grain baking of the traditional coal furnace is as follows:
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910527031.5A CN110657645A (en) | 2019-06-18 | 2019-06-18 | Method for directly utilizing crop straw gasification combustion to bake grain |
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| CN201910527031.5A CN110657645A (en) | 2019-06-18 | 2019-06-18 | Method for directly utilizing crop straw gasification combustion to bake grain |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713545A (en) * | 2009-12-04 | 2010-05-26 | 中国轻工业南宁设计工程有限公司 | Fuel conveying method and equipment of boiler for burning crop straws |
| CN201577519U (en) * | 2010-01-08 | 2010-09-15 | 贵州省毕节地区农业机械研究所 | Tobacco leaf curing heating device utilizing straw gasification |
| CN203375478U (en) * | 2013-08-02 | 2014-01-01 | 河北秋阳秸秆开发有限公司 | Integrated gasification furnace |
| CN204555301U (en) * | 2015-03-24 | 2015-08-12 | 毕节市农业机械研究所 | Removable staged air distribution formula gasifying stalk crops baking heating plant |
| CN208295903U (en) * | 2018-01-16 | 2018-12-28 | 云南中海路德清洁技术有限公司 | Chain-arranged type combustor |
-
2019
- 2019-06-18 CN CN201910527031.5A patent/CN110657645A/en active Search and Examination
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713545A (en) * | 2009-12-04 | 2010-05-26 | 中国轻工业南宁设计工程有限公司 | Fuel conveying method and equipment of boiler for burning crop straws |
| CN201577519U (en) * | 2010-01-08 | 2010-09-15 | 贵州省毕节地区农业机械研究所 | Tobacco leaf curing heating device utilizing straw gasification |
| CN203375478U (en) * | 2013-08-02 | 2014-01-01 | 河北秋阳秸秆开发有限公司 | Integrated gasification furnace |
| CN204555301U (en) * | 2015-03-24 | 2015-08-12 | 毕节市农业机械研究所 | Removable staged air distribution formula gasifying stalk crops baking heating plant |
| CN208295903U (en) * | 2018-01-16 | 2018-12-28 | 云南中海路德清洁技术有限公司 | Chain-arranged type combustor |
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