Rice hull gasification hot carbon co-production system

Abstract

The utility model discloses a rice hull gasification hot carbon co-production system which comprises a boiler, the boiler is a gasification grate furnace, the boiler is connected with a two-section combustor through a pipeline, the two-section combustor is connected with a waste heat boiler, the waste heat boiler is connected with a dust remover through a pipeline, the gasification grate furnace is connected with a carbon discharging device, the lower portion of the carbon discharging device is connected with a bucket elevator, and the bucket elevator is connected with a dust remover. The bucket elevator is connected with the carbon bin, the carbon bin is connected with the packing machine, the waste heat boiler is connected with the water feeding pump through a water supply pipeline, the waste heat boiler is connected with steam external supply equipment through a steam pipeline, and the water supply pipeline is connected with a desalting water pipeline of a chemical water workshop. According to the novel rice hull gasification hot carbon co-production device, steam generated by the waste heat boiler is directly supplied to the outside, rice hull carbon discharged by the gasification fire grate can be sold to the outside, the rice hull carbon can be used for metallurgy, water glass and activated carbon, the use value is high, the consumption of other water is reduced by using existing chemical water workshop demineralized water, and the energy-saving and consumption-reducing effects are obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass boiler combustion, in particular to a rice husk gasification heat-charcoal cogeneration system. Background Art

[0002] Direct combustion of biomass is the most traditional way of utilization for human beings, but the early combustion methods had extremely low biomass utilization rate and serious pollution. As technology becomes more and more advanced, biomass direct-fired boilers have emerged, and the utilization rate of biomass has been greatly improved. In addition, the boiler that directly burns biomass is an oxygen-enriched combustion process, and the carbon content of the ash discharged is extremely low, and the comprehensive utilization effect in the market is not ideal.

[0003] Rice husk, as a kind of biomass, also has the above problems. In addition, compared with biomass such as straw and branches with yellow and gray stalks, rice husk has a lower density and contains very low levels of N and S, which increases the cost of flue gas desulfurization and denitrification. The volatile content of rice husk is as high as 70%, which means it is easy to catch fire. It also means that the heat released by the combustion of rice husk mainly comes from the combustion of volatiles. Therefore, for biomass such as rice husk, the combustion status of volatiles directly affects the combustion efficiency to a large extent. Utility Model Content

[0004] The utility model is to overcome the shortcomings of the above-mentioned prior art and provide a rice husk gasification heat-charcoal cogeneration system. The steam generated by the waste heat boiler of the rice husk gasification heat-charcoal cogeneration device of the utility model is directly supplied to the outside, and the rice husk charcoal discharged from the vaporization grate can be sold to the outside. The rice husk charcoal can be used for metallurgy, water glass, and activated carbon, and has high use value. It utilizes the desalted water of the existing water treatment workshop, reduces the consumption of other water, and has obvious energy-saving and consumption-reducing effects.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A rice husk gasification heat and charcoal cogeneration system includes a boiler, a feeding device, a dust collector, and an SCR reactor. The boiler is connected to the feeding device, and the boiler is connected to the dust collector, the SCR reactor, the induced draft fan, and the chimney in sequence through pipelines. The boiler is a gasification grate furnace, and the boiler is connected to the second-stage burner through pipelines, and the second-stage burner is connected to the waste heat boiler, and the waste heat boiler is connected to the dust collector through pipelines, and the gasification grate furnace is connected to the charcoal discharge device, and the lower part of the charcoal discharge device is connected to the bucket elevator, and the bucket elevator is connected to the charcoal bin, and the charcoal bin is connected to the baler. The baler adopts an automatic baler, and the waste heat boiler is connected to the water supply pump through a water supply pipeline, and the waste heat boiler is connected to the steam external supply equipment through a steam pipeline, and the water supply pipeline is connected to the desalted water pipeline of the water treatment workshop.

[0007] The feeding device includes a screw feeder, a feeding fan, and a cyclone feeder. The feeding fan is connected to the upper part of the cyclone feeder through a material pipeline, the screw feeder is connected to the cyclone feeder through an exhaust pipeline, the lower part of the cyclone feeder is connected to the feed port of the gasification grate furnace, and the feeding fan adopts a pneumatic conveyor.

[0008] A deaerator is provided on the water supply pipe in front of the water pump, and the deaerator is connected to the steam pipe through a branch pipe.

[0009] The gasification grate furnace is connected to the water supply pipeline through a water cooling pipeline.

[0010] A cooling water tank is arranged on the water cooling pipeline, and the gasification grate furnace is connected to the cooling water tank through the water cooling pipeline.

[0011] A water-cooled screw feeder is provided at the charcoal outlet of the gasification grate furnace. The water-cooled screw feeder is connected to the charcoal outlet device through a discharge pipe, and a cooling water interface of the water-cooled screw feeder is connected to a cooling water tank through a water cooling pipe.

[0012] The cooling water interface of the carbon discharging device is connected to the water supply pipeline through the cooling pipeline.

[0013] The lower part of the gasification grate furnace is connected to the primary fan through a primary air duct.

[0014] The air outlet channel of the induced draft fan is provided with a branch channel, the branch channel is connected to the air inlet of the primary smoke fan, the air outlet of the primary smoke fan is connected to the air outlet duct of the primary fan through a pipe, the branch channel is connected to the air inlet of the secondary smoke fan, and the air outlet of the secondary smoke fan is connected to the air inlet of the second-stage burner through a pipe.

[0015] The upper portion of the second-stage burner is connected to the secondary air fan through a secondary air duct, and the lower portion of the second-stage burner is connected to the tertiary air fan through a tertiary air duct.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model boiler is a gasification grate furnace, the boiler is connected to the second stage burner through a pipeline, the second stage burner is connected to the waste heat boiler, the waste heat boiler is connected to the dust collector through a pipeline, the gasification grate furnace is connected to the charcoal discharge device, the waste heat boiler is connected to the water supply pump through a water supply pipeline, the waste heat boiler is connected to the steam external supply equipment through a steam pipeline, the water supply pipeline is connected to the desalted water pipeline of the water treatment workshop, the feeding fan adopts a pneumatic conveyor, and the rice husk is conveyed to the cyclone feeder at the boiler inlet through the Roots blower. After the air-material mixture enters the cyclone feeder, it flows downward in a spiral shape along the wall of the cyclone feeder at a high speed, and at the same time generates centrifugal force, throwing the rice husk onto the wall of the cyclone feeder, and then slides down along the wall due to gravity, and finally enters the gasification grate furnace. The air in the material is discharged from the exhaust pipe and enters the inlet side of the fan, so that the entire spiral feeder outlet pipe is in a negative pressure state, ensuring stable and reliable feeding.

[0018] 2. The lower part of the gasification grate furnace is connected to the primary fan through the primary air duct. By controlling the air intake of the primary fan, the oxygen content of the grate furnace is guaranteed, so that the boiler is in an anaerobic state. Since the gasification furnace is in an anaerobic state, the carbon content in the generated slag is high, forming rice husk charcoal, which is used for metallurgy, water glass, activated carbon, etc., and has a high use value.

[0019] 3. A cooling water tank is provided on the water-cooling pipeline, and the gasification grate furnace is connected to the cooling water tank through the water-cooling pipeline. A water-cooled screw feeder is provided at the charcoal outlet of the gasification grate furnace, and the water-cooled screw feeder is connected to the charcoal outlet device through the discharge pipeline, and the water-cooled screw feeder and the charcoal outlet device are both connected to the cooling water tank through the water-cooling pipeline. The water for the boiler, grate and auxiliary machine cooling system all comes from the desalted water in the water treatment workshop, and is supplied to the charcoal outlet device, deaerator and cooling water tank. The water in the cooling water tank is used to cool the grate and auxiliary machine, making full use of the existing desalted water in the water treatment workshop, reducing the consumption of other water, and achieving obvious energy-saving and consumption-reducing effects.

[0020] 4. A deaerator is installed on the water supply pipe in front of the water pump. The deaerator is connected to the steam pipe through a branch pipe. A path from the external steam supply is led to the deaerator as the steam source for heating the deaerator to reduce the oxygen content of the water supply.

[0021] 5. The combustible gas after the gasification grate enters the waste heat boiler through the high-temperature flue gas after combustion, and then enters the dust removal after the furnace. The steam generated by the waste heat boiler of the rice husk gasification heat and carbon cogeneration device is directly supplied to the outside, making full use of energy and reducing energy waste.

[0022] 6. The outlet passage of the induced draft fan is provided with a branch passage, which is connected to the air inlet of the primary smoke fan, the air outlet of the primary smoke fan is connected to the air outlet of the primary fan through a pipeline, and the branch passage is connected to the air inlet of the secondary smoke fan, and the air outlet of the secondary smoke fan is connected to the air inlet of the second-stage burner through a pipeline. Introducing the flue gas after the induced draft fan into the gasification furnace and the second-stage burner for secondary gasification or combustion can reduce the oxygen content in the gasification grate furnace and the second-stage burner, and can also reduce the amount of flue gas, thereby further reducing the emission of SO, NOx, and smoke.

[0023] 7. The upper part of the second stage burner is connected to the secondary fan through the secondary air duct, and the lower part of the second stage burner is connected to the tertiary fan through the tertiary air duct. The air intake of the burner is adjusted by the secondary fan and the tertiary fan to ensure that the high temperature combustible gas discharged from the gasification grate furnace can be fully burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0026] In the figure, a screw feeder 1, a feeding fan 2, a gasification grate furnace 3, a second-stage burner 4, a waste heat boiler 5, a deaerator 6, a water supply pump 7, an energy saver 8, a dust collector 9, an SCR reactor 10, a primary fan 11, a charcoal discharge device 12, a charcoal bin 13, a bucket elevator 14, a baler 15, a primary smoke fan 16, a secondary smoke fan 17, a secondary fan 18, a tertiary fan 19, a chimney 20, an induced draft fan 21, a cyclone feeder 22, a cooling water tank 23, a water-cooled screw feeder 24, a steam external supply device 25, a water supply pipeline 26, an exhaust pipeline 27, a material pipeline 28, a cooling pipeline 29, a primary air duct 30, a secondary air duct 31, a tertiary air duct 32, and a branch channel 33. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] like Figure 1As shown, a rice husk gasification heat and charcoal cogeneration system includes a boiler, a feeding device, a dust collector 9, and an SCR reactor 10. The boiler is connected to the feeding device, and the boiler is connected to the dust collector 9, the SCR reactor 10, the induced draft fan 21, and the chimney 20 in sequence through pipelines. The boiler is a gasification grate furnace 3, and the boiler is connected to the second-stage burner 4 through a pipeline, and the second-stage burner 4 is connected to the waste heat boiler 5, and the waste heat boiler 5 is connected to the dust collector 9 through a pipeline. The gasification grate furnace 3 is connected to the charcoal discharge device 12, and the charcoal discharge device 12 is connected to the bucket elevator 14, and the bucket elevator 14 is connected to the charcoal bin 13, and the charcoal bin 13 is connected to the baler 15. The baler 15 adopts an automatic baler, and the waste heat boiler 5 is connected to the water supply pump 7 through a water supply pipeline 26, and the waste heat boiler 5 is connected to the steam external supply device 25 through a steam pipeline, and the water supply pipeline 26 is connected to the desalted water pipeline of the water treatment workshop.

[0029] The feeding device includes a screw feeder 1, a feeding fan 2, and a cyclone feeder 22. The feeding fan 2 is connected to the upper part of the cyclone feeder 22 through a material pipeline 28. The screw feeder 1 is connected to the cyclone feeder 22 through an exhaust pipeline 27. The lower part of the cyclone feeder 22 is connected to the feed port of the gasification grate furnace 3. The feeding fan 2 adopts a pneumatic conveyor.

[0030] The cyclone feeder 22 adopts the cyclone separation principle. After the air-material mixture enters the cyclone feeder 22, it flows downward in a spiral shape along the wall of the cyclone feeder at a high speed, and at the same time generates centrifugal force, which throws the rice husk onto the wall of the cyclone feeder, and then slides down along the wall due to gravity, and finally enters the gasification grate furnace. The air in the material is discharged from the exhaust pipe and enters the inlet side of the fan, so that the entire spiral feeder outlet pipe is in a negative pressure state.

[0031] A deaerator 6 is provided on the water supply pipeline in front of the water supply pump 7, and the deaerator 6 is connected to the steam pipeline through a branch pipeline. A steam source for heating the deaerator 6 is led from the external steam supply to the deaerator 6.

[0032] The gasification grate furnace 3 is connected to the water supply pipeline 26 through a water cooling pipeline.

[0033] A cooling water tank 23 is provided on the water cooling pipeline, and the gasification grate furnace 3 is connected to the cooling water tank 23 via the water cooling pipeline.

[0034] A water-cooled screw feeder 24 is provided at the charcoal outlet of the gasification grate furnace 3 , and the water-cooled screw feeder 24 is connected to the charcoal outlet device 12 through a discharge pipe, and the water-cooled screw feeder 24 is connected to the cooling water tank 23 through a water-cooling pipe.

[0035] The char discharge device 12 is connected to the water supply pipeline 26 via a cooling pipeline 29 .

[0036] The lower part of the gasification grate furnace 3 is connected to the primary fan 11 through the primary air duct 30. By controlling the air intake of the primary fan 11, the oxygen content of the grate furnace is guaranteed, so that the inside of the boiler is in an anaerobic state. Since the gasification furnace is in an anaerobic state, the carbon content in the generated slag is extremely high, forming rice husk charcoal, which can be used for metallurgy, water glass, activated carbon, etc., and has a high use value.

[0037] The upper part of the second stage burner 4 is connected to the secondary fan 18 through the secondary air duct 31, and the lower part of the second stage burner 4 is connected to the tertiary fan 19 through the tertiary air duct 32. The air intake of the second stage burner 4 is adjusted by the secondary fan 18 and the tertiary fan 19 to ensure that the high temperature combustible gas discharged from the gasification grate furnace 3 can be fully burned.

[0038] The outlet passage of the induced draft fan 21 is provided with a branch passage 33, the branch passage 33 is connected to the air inlet of the primary smoke fan 16, the outlet of the primary smoke fan 16 is connected to the outlet passage of the primary fan 11 through a pipeline, the branch passage is connected to the air inlet of the secondary smoke fan 17, the outlet of the secondary smoke fan 17 is connected to the air inlet of the second stage burner 4 through a pipeline. The flue gas after the induced draft fan 21 is introduced into the gasification furnace and the second stage burner 4 for secondary gasification or combustion, which can reduce the oxygen content in the gasification grate furnace 3 and the second stage burner 4, and can also reduce the amount of flue gas, thereby further reducing the emission of SO2, NOx, and smoke.

[0039] The utility model adopts pneumatic conveying to convey rice husk to the cyclone feeder at the boiler inlet through the Roots blower. The charcoal outlet outside the grate furnace is connected to the water-cooled spiral feeder 24 and then to the charcoal outlet device 12, and then the charcoal is stored in the charcoal bin through the bucket elevator 14. The charcoal bin is connected to an automatic packaging machine to automatically package the rice husk charcoal, and then the packaged rice husk charcoal is transported to the storage workshop.

[0040] The utility model's boiler water, gasification grate furnace 3 and auxiliary machine cooling system such as the charcoal discharge device 12 all come from the desalted water in the water treatment workshop, one way is connected to the charcoal discharge device and the deaerator, the other way is connected to the cooling water tank, and the water in the cooling water tank is used to cool the grate and auxiliary machines.

[0041] The combustible gas after the grate furnace 3 enters the waste heat boiler 5 through the high-temperature flue gas after combustion, and then enters the dust removal after the furnace, and the steam is supplied to other equipment through the steam supply.

[0042] The utility model reduces the types of equipment, has a simple structure, and reduces the investment in equipment. The utility model adopts pneumatic conveying instead of mechanical conveying, thereby reducing the investment in belt conveyors and trestles in the early stage and the operation and maintenance costs in the later stage.

[0043] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For ordinary technicians in this technical field, several improvements or equivalent substitutions can be made according to the principle of the present invention, and these improvements or equivalent substitutions are also considered to fall within the protection scope of the present invention.

Claims

1. A rice husk gasification heat and carbon cogeneration system, comprising a boiler, a feeding device, a dust collector, and an SCR reactor, wherein the boiler is connected to the feeding device, and the boiler is connected to the dust collector, the SCR reactor, the induced draft fan, and the chimney in sequence through pipelines, characterized in that: The boiler is a gasification grate furnace, which is connected to the second-stage burner through a pipeline, the second-stage burner is connected to the waste heat boiler, the waste heat boiler is connected to the dust collector through a pipeline, the gasification grate furnace is connected to the charcoal discharge device, the lower part of the charcoal discharge device is connected to the bucket elevator, the bucket elevator is connected to the charcoal bin, the charcoal bin is connected to the baler, the waste heat boiler is connected to the water feed pump through a water supply pipeline, the waste heat boiler is connected to the steam external supply equipment through a steam pipeline, and the water supply pipeline is connected to the desalted water pipeline of the water treatment workshop.

2. The rice husk gasification heat and carbon cogeneration system according to claim 1, characterized in that: The feeding device includes a screw feeder, a feeding fan, and a cyclone feeder. The feeding fan is connected to the upper part of the cyclone feeder through a material pipeline, the screw feeder is connected to the cyclone feeder through an exhaust pipeline, the lower part of the cyclone feeder is connected to the feed port of the gasification grate furnace, and the feeding fan adopts a pneumatic conveyor.

3. The rice husk gasification heat and carbon cogeneration system according to claim 1, characterized in that: A deaerator is provided on the water supply pipe in front of the water feed pump, and the deaerator is connected to the steam pipe through a branch pipe.

4. The rice husk gasification heat-charcoal cogeneration system according to claim 1, characterized in that: The gasification grate furnace is connected to the water supply pipeline through a water cooling pipeline.

5. The rice husk gasification heat-charcoal cogeneration system according to claim 4, characterized in that: A cooling water tank is arranged on the water cooling pipeline, and the gasification grate furnace is connected to the cooling water tank through the water cooling pipeline.

6. The rice husk gasification heat and carbon cogeneration system according to claim 4, characterized in that: A water-cooled screw feeder is provided at the charcoal outlet of the gasification grate furnace. The water-cooled screw feeder is connected to the charcoal outlet device through a discharge pipe, and the water-cooled screw feeder is connected to the cooling water tank through a water cooling pipe.

7. The rice husk gasification heat and carbon cogeneration system according to claim 1, characterized in that: The charcoal discharging device is connected with the water supply pipeline through the cooling pipeline.

8. The rice husk gasification heat and carbon cogeneration system according to claim 1, characterized in that: The lower part of the gasification grate furnace is connected to the primary fan through a primary air duct.

9. The rice husk gasification heat-charcoal cogeneration system according to claim 8, characterized in that: The air outlet channel of the induced draft fan is provided with a branch channel, the branch channel is connected to the air inlet of the primary smoke fan, the air outlet of the primary smoke fan is connected to the air outlet duct of the primary fan through a pipe, the branch channel is connected to the air inlet of the secondary smoke fan, and the air outlet of the secondary smoke fan is connected to the air inlet of the second-stage burner through a pipe.

10. The rice husk gasification heat-charcoal cogeneration system according to claim 9, characterized in that: The upper portion of the second-stage burner is connected to the secondary air fan through a secondary air duct, and the lower portion of the second-stage burner is connected to the tertiary air fan through a tertiary air duct.

Images