Coupling blending combustion system for crushing, screening and conveying biomass

Abstract

The utility model provides a coupling blending combustion system for crushing, screening and conveying biomass, and relates to the technical field of biomass energy. The system comprises a loading machine, a shredding machine, a rolling screening feeding belt and a rolling screen, the loading machine is used for loading biomass materials and loading the biomass materials into the shredding machine from the feeding end of the shredding machine, primary crushing is achieved through the shredding machine, and primary screening is achieved through the rolling screen; the system further comprises a chain plate belt, a winnowing belt, a winnowing fan, a pulverizer, a centrifugal suction fan, a dust remover, a cyclone separator, a rotary feeder, a conveying pipeline, a Roots blower and a biomass burner, biomass materials are conveyed into the biomass burner through the conveying pipeline by the Roots blower, secondary screening is achieved by the winnowing fan, and secondary crushing is achieved by the pulverizer. The primary crushing and screening system and the secondary crushing and screening blending combustion system are combined to ensure that biomass materials entering the furnace are clean, the winnowing rate of rotten soil, dust, stones, clods and iron blocks in the biomass materials reaches 85% or above, and the combustion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass energy, in particular to a coupled blending and burning system for biomass crushing, screening and transportation. Background Art

[0002] At present, biomass power generation and coal power generation cannot be organically combined, and the existing coal-fired power plant system can only burn coal. The Chinese invention patent with application number 201910166596.5 discloses a preparation method and application of new energy straw combustion powder. It can only use straw to prepare new energy straw combustion powder and use it in coal-fired power companies to replace fuel coal for power generation. It cannot be organically combined with the existing coal-fired power plant system. The Chinese invention patent with application number 202110838750.6 discloses a crushing and granulation equipment and working method for biomass power generation. It has the problem of incomplete screening and crushing, which leads to difficulties in biomass (straw) combustion and frequent biomass feeding failures, which directly affect the normal operation of biomass coupled combustion. Utility Model Content

[0003] The utility model provides a coupled combustion system for biomass crushing, screening and conveying. The existing technology has the problems of being unable to be organically combined with the current coal-fired power plant system, incomplete biomass screening and crushing, resulting in difficulty in biomass combustion and frequent biomass feeding failures.

[0004] In order to solve the above utility model purpose, the technical solution provided by the utility model is as follows:

[0005] A coupled biomass crushing, screening, conveying and burning system, comprising a primary crushing, screening and burning system and a secondary crushing, screening and burning system;

[0006] The primary crushing and screening system includes a loader and a shredder, wherein the loader is capable of loading biomass and loading the biomass from the feed end of the shredder into the shredder, the discharge end of the shredder is located at the input end of the rolling screening feed belt, and the output end of the rolling screening feed belt is located at the input port of the rolling screen;

[0007] The secondary crushing, screening and incineration system includes a chain belt, the output port of the rolling screen is located above the input end of the chain belt, the output end of the chain belt is located at the input end of the winnowing belt, the output end of the winnowing belt is located at the inlet of the winnowing fan, the output port of the winnowing fan is connected to the input port of the pulverizer, the output port of the pulverizer is connected to the centrifugal suction fan, the centrifugal suction fan is connected to the cyclone separator, the dust outlet of the cyclone separator is connected to the centrifugal suction fan and the dust collector, the discharge end of the cyclone separator and the dust outlet of the dust collector are both connected to the feed port of the rotary feeder, the discharge port of the rotary feeder is connected to the biomass burner through a conveying pipe, and a Roots blower is connected to the conveying pipe, and the Roots blower conveys the material from the conveying pipe to the biomass burner.

[0008] The dust outlet of the dust collector is connected to the dust collecting screw, the dust collecting feeder and the material supplying screw in sequence, and the dust outlet of the material supplying screw is connected to the material feeding port of the rotary feeder.

[0009] Preferably, a feed chamber is provided in the rotary feeder, the top of the feed chamber has a feed port, the bottom of the feed chamber has a discharge port, a rotating blade is provided in the feed chamber near the discharge port, and an air escape chamber is provided on the outside of the feed chamber in the rotary feeder, one end of the air escape chamber is connected to the discharge port, and the other end is connected to the negative pressure pipe interface, the negative pressure pipe interface is connected to the negative pressure pipe, and a balance pipe is provided at the discharge port.

[0010] Preferably, the shredder is a double-shaft shredder with a rated output of 20 t / h and a crushed material size of no more than 100 mm; the pulverizer is a high-speed pulverizer with a rated output of 10 t / h and a crushed material size of no more than 20 mm.

[0011] Preferably, the rated output of the rolling screen is 20 t / h.

[0012] Preferably, the rated output of the chain belt is 20 t / h.

[0013] Preferably, the rated output of the air separation fan is 10t / h.

[0014] Preferably, the rated output of the Roots blowers is 10 t / h.

[0015] Preferably, the rated output of the rotary feeder is 10 t / h.

[0016] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0017] In the above scheme, this system uses the existing coal-fired power plant system to carry out biomass coupling power generation, realizing the organic combination of biomass and the existing coal-fired power plant system. After screening and crushing, the biomass material is input into the furnace of the biomass burner and burned with coal to generate electricity, realizing the flexibility of coal-fired power fuel, increasing the proportion of non-fossil energy consumption and the proportion of fossil energy substitution, and giving play to the platform advantage of centralized treatment of pollutants from clean and efficient coal-fired power plants; this system reduces the fuel cost and total CO2 emissions of coal-fired power units, reduces pollutant emissions, promotes the prevention and control of air, water and soil pollution, realizes the resource utilization and large-scale disposal of biomass, and at the same time, reduces environmental protection costs and brings carbon sink income, which has good social and economic benefits and is of great significance for alleviating its own operating pressure;

[0018] This system combines two-stage screening and two-stage crushing to ensure the cleanliness of the biomass entering the furnace. The wind selection rate of rotten soil, dust, stone, mud and iron in the biomass is more than 85%. The setting of two-stage screening, two-stage crushing and conveying solves the problem of incomplete biomass screening and crushing. Biomass is easy to burn, which reduces the failure rate of biomass feeding.

[0019] The Roots blower sends the collected dust and biomass to the biomass burner, which improves the utilization rate of biomass and reduces energy waste.

[0020] The selection of the rated output of the equipment in this system ensures its output capacity and output efficiency, ensures its organic integration with the existing coal-fired power plant system, and ensures the feasibility of biomass combustion power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a structural schematic diagram of the coupled combustion system of biomass crushing, screening and conveying of the utility model;

[0023] Figure 2 It is a schematic diagram of the dust removal structure of the coupled combustion system of biomass crushing, screening and conveying of the utility model;

[0024] Figure 3 This is a structural schematic diagram of a centrifugal suction fan of a coupled combustion system for biomass crushing, screening and conveying according to the utility model.

[0025] The accompanying drawings are described as follows:

[0026] 1. Loader; 2. Shredder; 3. Rolling screen feed belt; 4. Rolling screen; 5. Chain plate belt; 6. Air separation fan; 7. Crusher; 8. Roots blower A; 9. Roots blower B; 10. Centrifugal suction fan; 11. Rotary feeder; 111. Feed port; 112. Negative pressure pipe interface; 113. Discharge port; 114. Feed cavity; 115. Escape chamber; 116. Rotating impeller; 12. Cyclone separator; 13. Conveying pipeline; 14. Dust collector; 15. Biomass burner; 17. Dust removal screw; 18. Dust removal feeder; 19. Supply and collection screw. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantitative limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0029] It should be noted that the terms "up", "down", "left", "right", "front", "back", etc. used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0030] like Figure 1As shown, this embodiment provides a coupled biomass crushing, screening and conveying co-combustion system, including a primary crushing, screening system and a secondary crushing, screening and co-combustion system. The primary crushing, screening system includes a loader 1, a crushing system, a screening system and a conveying system. The crushing system includes a loader 1, a shredder 2, a rolling screen 4, a feed belt 3 and a rolling screen 4. The secondary crushing, screening and co-combustion system includes a chain belt 5, an air separation belt, an air separation fan 6, a pulverizer 7, a Roots blower A8, a Roots blower B9, a centrifugal suction fan 10, a rotary feeder 11, a cyclone separator 12, a conveying pipeline 13, a dust collector 14, a heat exchanger and a biomass burner 15 of an existing coal-fired power plant system.

[0031] The coupled biomass crushing, screening and conveying co-combustion system of this embodiment adopts one crushing and screening system with two secondary crushing, screening and co-combustion systems, which ensures the efficiency of biomass screening, crushing and conveying, so that it can be matched with the existing coal-fired power plant system.

[0032] The loader 1 is used to load the biomass, and the loader 1 loads the biomass into the shredder 2. Specifically, the loader 1 loads the biomass into the shredder 2 through the feed end of the shredder 2, and the biomass is crushed in the shredder 2 to achieve primary crushing. Preferably, the shredder 2 uses a double-shaft shredder 2, with a rated output of 20 t / h, and a crushed output size of no more than 100 mm.

[0033] The discharging end of the shredder 2 is located above the input end of the rolling screen 4 selection feeding belt, so that the biomass material after primary crushing falls on the rolling screen 4 selection feeding belt, and the rolling screen 4 selection feeding belt transports the biomass material after primary crushing to the output end of the rolling screen 4 selection feeding belt; preferably, one set of rolling screen 4 selection feeding belt is used.

[0034] The output end of the feed belt of the rolling screen 4 is located at the input port of the rolling screen 4. The biomass material after the primary crushing enters the inlet and outlet of the rolling screen 4 through the output end of the feed belt of the rolling screen 4, and then is screened in the rolling screen 4 to achieve primary screening, and dust, rotten soil and fine stones are screened out; preferably, one rolling screen 4 is used, and its rated output is 20t / h.

[0035] The output port of the rolling screen 4 is located above the input end of the chain plate belt 5, and the biomass after the primary screening falls onto the input end of the chain plate belt 5 and is transported to the output end of the chain plate belt 5 via the chain plate belt 5;

[0036] The output end of the chain plate belt 5 is connected to two air separation belts, and the two air separation belts are arranged in a straight line. The chain plate belt 5 and the two air separation belts are arranged in a T shape. The output end of the chain plate belt 5 is located at the input end of the air separation belt, and the output end of the air separation belt is located at the inlet of the air separation fan 6. The chain plate belt 5 transports the biomass to the two air separation belts. The biomass after the first-level screening falls from the output end of the air separation belt into the inlet of the air separation fan 6, and then enters the air separation fan 6 for screening, realizing the second-level screening, and screening out large stones, mud and iron blocks; preferably, one chain plate belt 5 is used, and its rated output is 20t / h; two air separation belts are used; two air separation fans 6 are used, and their rated output is 10t / h.

[0037] The output port of the air separation fan 6 is connected to the input port of the pulverizer 7. The biomass after secondary screening enters the input port of the pulverizer 7 through the output port of the air separation fan 6, and then enters the pulverizer 7 for crushing to achieve secondary crushing; preferably, the pulverizer 7 uses 2 high-speed pulverizers 7, whose rated output is 10t / h, and the crushed output size is not more than 20mm.

[0038] The output port of the pulverizer 7 is connected to the centrifugal suction fan 10, which is connected to the cyclone separator 12. The output end of the cyclone separator 12 is connected to the input end of the rotary feeder 11. The discharge port of the rotary feeder 11 is connected to the biomass burner 15 through the conveying pipe 13. The biomass material after secondary crushing is sucked in by the centrifugal suction fan 10 and separated in the cyclone separator 12. The cyclone separator 12 separates the biomass material and impurities. The biomass material is sent to the conveying pipe 13 through the rotary feeder 11. The dust and wind separated by the cyclone separator 12 are sent to the dust collector for dust removal through the centrifugal suction fan 10. The dust after dust removal enters the rotary feeder 11, and the wind after dust removal is discharged into the atmosphere. The Roots blower sends the biomass material to the biomass burner in two ways and enters the furnace for combustion. Preferably, two centrifugal suction fans 10 are used; two cyclone separators 12 are used; two rotary feeders 11 are used; two biomass burners are used; two Roots blowers are used, Roots blowers A8 and Roots blowers B9, and their rated outputs are both 10t / h; two rotary feeders 11 are used, and their rated outputs are 10t / h.

[0039] like Figure 2 As shown, Figure 2 The direction of the dust removal movement indicated by the arrow in the middle, the dust outlet of the dust collector 14 is connected in sequence with the dust removal screw 17, the dust removal feeder 18, the supply and collection screw 19, the rotary feeder 11 and the conveying pipe 13. After the dust is removed by the dust collector 14, the dust removal screw 17 and the dust removal feeder 18, it enters the rotary feeder 11 through the supply and collection screw 19. Preferably, two dust removal screws, two dust removal feeders, two supply and collection screws and two rotary feeders 11 are used.

[0040] like Figure 3 As shown, Figure 3 The direction of the arrow in the figure is the escape route of the wind. A feed chamber 113 is provided in the rotary feeder 11. The top of the feed chamber 113 has a feed port 111 and the bottom has a discharge port 113. Rotating blades are provided in the feed chamber 113 near the discharge port 113. An escape chamber 115 is provided on the outside of the feed chamber 113 in the rotary feeder 11. One end of the escape chamber 115 is connected to the discharge port 113 and the other end is connected to the negative pressure pipe interface 112. The negative pressure pipe interface 112 is connected to the negative pressure pipe, and a balance pipe is provided at the discharge port 113. The cyclone separator 12 is connected to the feed port 111 of the rotary feeder 11. The biomass separated by the cyclone separator 12 and the dust after dust removal enter the feed chamber 114 of the rotary feeder 11 through the feed port 111. The biomass falls freely in the feed chamber 114. The rotating blades 116 discharge the biomass from the discharge port 113. The negative pressure pipe interface 112 of the rotary feeder 11 is connected to the negative pressure pipe. A balance pipe is provided at the discharge port 113. The wind leaking from the discharge port 113 is discharged from the negative pressure pipe interface 112 after passing through the escape chamber 115. The discharge port 113 is connected to the conveying pipeline 13, and the dust and biomass are delivered to the biomass burner by the Roots blower, which improves the utilization rate of the biomass and reduces energy waste.

[0041] This system uses the existing coal-fired power plant system to carry out biomass coupling power generation, realizing the organic combination of biomass and the existing coal-fired power plant system. After screening and crushing, the biomass material is input into the furnace of the biomass burner and burned with coal to generate electricity, realizing the flexibility of coal-fired power fuel, increasing the proportion of non-fossil energy consumption and the proportion of fossil energy substitution, and giving play to the platform advantage of centralized treatment of pollutants from clean and efficient coal-fired power plants; this system reduces the fuel cost and total CO2 emissions of coal-fired power units, reduces pollutant emissions, promotes the prevention and control of air, water and soil pollution, realizes the resource utilization and large-scale disposal of biomass, and at the same time, reduces environmental protection costs and brings carbon sink income, which has good social and economic benefits and is of great significance for alleviating its own operating pressure;

[0042] This system combines two-stage screening and two-stage crushing to ensure the cleanliness of the biomass entering the furnace. The wind selection rate of rotten soil, dust, stone, mud and iron in the biomass is more than 85%. The setting of two-stage screening, two-stage crushing and conveying solves the problem of incomplete biomass screening and crushing. Biomass is easy to burn, which reduces the failure rate of biomass feeding.

[0043] The Roots blower sends the collected dust and biomass to the biomass burner, which improves the utilization rate of biomass and reduces energy waste.

[0044] The selection of the rated output of the equipment in this system ensures its output capacity and output efficiency, ensures its organic integration with the existing coal-fired power plant system, and ensures the feasibility of biomass combustion power generation.

[0045] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. The protection scope of the present utility model shall be based on the protection scope of the claims.

Claims

1. A coupled combustion system for biomass crushing, screening and transportation, characterized in that: It includes a primary crushing and screening system and a secondary crushing and screening co-combustion system; The primary crushing and screening system includes a loader and a shredder, wherein the loader is capable of loading biomass and loading the biomass from the feed end of the shredder into the shredder, the discharge end of the shredder is located at the input end of the rolling screening feed belt, and the output end of the rolling screening feed belt is located at the input port of the rolling screen; The secondary crushing, screening and incineration system includes a chain belt, the output port of the rolling screen is located above the input end of the chain belt, the output end of the chain belt is located at the input end of the winnowing belt, the output end of the winnowing belt is located at the inlet of the winnowing fan, the output port of the winnowing fan is connected to the input port of the pulverizer, the output port of the pulverizer is connected to the centrifugal suction fan, the centrifugal suction fan is connected to the cyclone separator, the dust outlet of the cyclone separator is connected to the centrifugal suction fan and the dust collector, the discharge end of the cyclone separator and the dust outlet of the dust collector are both connected to the feed port of the rotary feeder, the discharge port of the rotary feeder is connected to the biomass burner through a conveying pipe, and a Roots blower is connected to the conveying pipe, and the Roots blower conveys the material from the conveying pipe to the biomass burner.

2. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The dust outlet of the dust collector is connected to the dust collecting screw, the dust collecting feeder and the material supplying screw in sequence, and the dust outlet of the material supplying screw is connected to the material feeding port of the rotary feeder.

3. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: A feed chamber is provided in the rotary feeder, the top of the feed chamber has a feed port, the bottom of the feed chamber has a discharge port, a rotating blade is provided in the feed chamber near the discharge port, an air escape chamber is provided on the outside of the feed chamber in the rotary feeder, one end of the air escape chamber is connected to the discharge port, and the other end is connected to the negative pressure pipe interface, the negative pressure pipe interface is connected to the negative pressure pipe, and a balance pipe is provided at the discharge port.

4. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: 1 set of crushing and screening system is equipped with 2 sets of secondary crushing, screening and blending systems.

5. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The shredder adopts a double-shaft shredder with a rated output of 20 t / h and a crushed material size of no more than 100 mm; the pulverizer adopts a high-speed pulverizer with a rated output of 10 t / h and a crushed material size of no more than 20 mm.

6. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The rated output of the rolling screen is 20t / h.

7. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The rated output of the chain belt is 20t / h.

8. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The rated output of the air separation fan is 10t / h.

9. The coupled combustion system for biomass crushing, screening and transportation according to claim 1 is characterized in that: The rated output of Roots blowers is 10t / h.

10. The coupled combustion system for biomass crushing, screening and transportation according to claim 1, characterized in that: The rated output of the rotary feeder is 10t / h.

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