Biomass fluidized bed gasifier heat supply coupling internal combustion engine power generation system

Abstract

The utility model discloses a biomass fluidized bed gasification furnace heat supply coupling internal combustion engine power generation system. A biomass gasification furnace utilizes biomass raw materials to produce combustible gas; the internal combustion generator set generates power by taking combustible gas as a gas source, the working time of the internal combustion generator set is concentrated on the peak-flat section of the power grid electricity price, and the electric energy generated by the internal combustion generator set is supplied to the power grid; the biomass gas steam boiler receives combustible gas and burns the combustible gas to generate heat, steam heat energy generated by the biomass gas steam boiler is supplied to the user side, and the working time period of the biomass gas steam boiler is concentrated in the valley period of the power grid electricity price. Both the biomass gas steam boiler and the internal combustion generator set receive combustible gas produced by the biomass gasification furnace through gas pipelines, and the gas pipelines are provided with electric control valves for controlling the gas supply states of the internal combustion generator set and the biomass gas steam boiler. The comprehensive energy consumption cost can be reduced, the energy utilization efficiency is improved, and meanwhile, remarkable environmental benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the energy comprehensive high -efficient utilization technical field, concretely relates to a kind of biomass fluidized bed gasification furnace heating coupling internal combustion engine power generation system. BACKGROUND

[0002] With the growth of energy demand and the improvement of environmental protection requirements, the traditional energy utilization mode faces many challenges. On the one hand, there are differences in peak and valley periods of power grid electricity price, resulting in large fluctuations in energy use cost in different periods. On the other hand, as a clean and renewable energy, the efficient utilization of biomass energy still needs to be further explored and improved. At present, pure biomass gasification power generation or biomass steam boiler heating system cannot fully develop the potential of biomass energy, and cannot effectively utilize the problem of high electricity price in peak period and low electricity price in valley period of power grid. The comprehensive energy cost is high.

[0003] Therefore, how to provide a biomass fluidized bed gasification furnace heating coupling internal combustion engine power generation system capable of reducing the comprehensive energy cost is a problem that needs to be solved by those skilled in the art. INVENTION CONTENTS

[0004] Therefore, the utility model provides a biomass fluidized bed gasification furnace heating coupling internal combustion engine power generation system, which can reasonably dispatch the utilization of combustible gas, complete the comprehensive utilization effect of power generation and heating, improve the comprehensive utilization rate of energy, reduce the energy cost, and is suitable for various places needing heating and power generation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a biomass fluidized bed gasification furnace heating coupling internal combustion engine power generation system, comprising: a biomass gasifier, which produces combustible gas by using biomass raw materials;

[0006] An internal combustion generator set, which generates electricity by using combustible gas as fuel gas source, the working time of the internal combustion generator set is concentrated in the peak and flat section of power grid electricity price, and the electric energy generated by the internal combustion generator set is supplied to the power grid;

[0007] A biomass gas steam boiler, which receives combustible gas and produces heat by combustion, the steam heat energy produced by the biomass gas steam boiler is supplied to the user end, the working time of the biomass gas steam boiler is concentrated in the valley section of power grid electricity price, and the biomass gas steam boiler and the internal combustion generator set both receive the combustible gas produced by the biomass gasifier through a gas pipeline, and an electric regulating valve for controlling the gas supply state of the internal combustion generator set and the biomass gas steam boiler is installed on the gas pipeline.

[0008] The utility model discloses a beneficial effect is: this system has collected two modes of heat supply and power generation, and the energy of heat supply and power generation all originates from the environmental protection biomass combustible gas, carries out power generation in the peak flat section of the grid electricity price, supplies heat in the valley section of the grid electricity price, can reduce the electricity cost of heat supply in this way, controls the gas supply state of the internal combustion generator set and biomass gas steam boiler through electric regulating valve, completes the comprehensive scheduling of heat supply and power generation, possesses good economy and environmental benefit, can be widely applied to all kinds of places needing heat supply and power generation.

[0009] Preferably, the exhaust gas pipeline of the internal combustion generator set is connected with a waste heat steam boiler, and the exhaust gas pipeline of the biomass gas steam boiler is connected with an economizer, the waste heat steam boiler and the economizer utilize the waste heat of flue gas to provide steam heat energy, and the exhaust gas pipeline of the internal combustion generator set is connected with the exhaust gas pipeline of the biomass gas steam boiler and connected with an external exhaust chimney.

[0010] Thus, the generated flue gas of the internal combustion engine and the generated flue gas of the biomass gas steam boiler can be reused, the waste heat of the flue gas is utilized to complete gradient heat energy supply, and the energy utilization efficiency is improved.

[0011] Preferably, the biomass gas steam boiler is connected with an external oxygen removal device, the oxygen removal device provides steam water source for the biomass gas steam boiler and the waste heat steam boiler through an oxygen removal water pipeline, the oxygen removal water pipeline connected with the economizer, and the oxygen removal water of the biomass gas steam boiler absorbs the waste heat of flue gas of the biomass gas steam boiler through the economizer, and the waste heat steam boiler utilizes the waste heat of flue gas of the internal combustion generator set to generate steam.

[0012] Thus, the oxygen removal device can provide oxygen removal water, the oxygen removal water can avoid corrosion of the pipeline and related heat supply equipment, and the oxygen removal water provided by the oxygen removal device also provides necessary water source for steam heat energy.

[0013] The system fully utilizes the waste heat of flue gas to complete heat energy recovery and utilization, and improves the energy utilization efficiency and quality.

[0014] Preferably, the cylinder liner of the internal combustion engine of the internal combustion generator set is connected with a cylinder liner water circulation pipeline, the cylinder liner water circulation pipeline is connected in parallel with a heat supply heat exchanger and a hot water type lithium bromide unit, the heat supply heat exchanger is connected with an external hot water pipeline, the hot water pipeline provides heat energy for users, and the hot water type lithium bromide unit is connected with an external cold water pipeline, and the cold water pipeline meets the refrigeration demand of users.

[0015] The technical effect produced by this is that the heat utilization of the cylinder liner water of the internal combustion engine can fully exert the energy advantage, improve the energy utilization rate, the heat energy of the cylinder liner water is recovered by the heat exchanger, heat source is provided for the user, the hot water type lithium bromide unit is used to provide the refrigeration demand for the user, the system can meet the heat and cold demand of the user end while recovering the energy heat, and the comprehensive energy cost is reduced.

[0016] Preferably, a circulating cooling pipeline for heat dissipation is connected to the hot water type lithium bromide unit, a cooling tower is connected to the circulating cooling pipeline, and the heat generated by the hot water type lithium bromide unit during refrigeration is dissipated by the circulating cooling pipeline and the cooling tower.

[0017] The technical effect produced by this is that the cooling tower can dissipate the heat generated by the hot water type lithium bromide unit during refrigeration through the atmosphere.

[0018] Preferably, a cooling water pump is connected to the circulating cooling pipeline.

[0019] The technical effect produced by this is that the cooling water pump can ensure the circulation of the cooling water, thereby ensuring the refrigeration efficiency of the hot water type lithium bromide unit.

[0020] Preferably, a cylinder liner water circulating pump is connected to the cylinder liner water circulating pipeline and is located upstream of the cylinder liner of the internal combustion engine.

[0021] The technical effect produced by this is that the cylinder liner water circulating pump can ensure the circulation of the cylinder liner water, thereby ensuring the subsequent heat exchange process, fully utilizing the waste heat of the internal combustion generator set, and improving the energy utilization rate.

[0022] Preferably, a biomass gas purification device is connected to the gas pipeline close to the internal combustion generator set.

[0023] The technical effect produced by this is that the biomass gas purification device can purify the combustible gas entering the internal combustion engine, avoiding the influence on the internal combustion engine after long-term use, and the biomass gas purification device can be an electric precipitation tar removal device. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure diagram of the biomass fluidized bed gasification furnace heat supply coupling internal combustion engine power generation system.

[0025] 1 biomass gasification furnace, 2 internal combustion generator set, 3 biomass gas steam boiler, 4 gas pipeline, 5 electric regulating valve, 6 smoke exhaust pipeline, 7 waste heat steam boiler, 8 coal economizer, 9 external smoke stack, 10 deoxygenation device, 11 deoxygenated water pipeline, 12 cylinder liner water circulating pipeline, 13 heat supply heat exchanger, 14 hot water type lithium bromide unit, 15 hot water pipeline, 16 cold water pipeline, 17 circulating cooling pipeline, 18 cooling tower, 19 cooling water pump, 20 cylinder liner water circulating pump, 21 biomass gas purification device, 22 deoxygenated water pump. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0027] Referring to the drawings of the utility model Figure 1 According to the biomass fluidized bed gasification furnace heat supply coupling internal combustion engine power generation system in the embodiments of the utility model, it comprises: a biomass gasification furnace 1, the biomass gasification furnace 1 utilizes biomass raw materials to output combustible gas, the biomass gasification furnace is a fluidized bed biomass gasification furnace, and is used to convert biomass raw materials into biomass combustible gas, and it is the basis of the whole system, and provides combustible gas source for subsequent energy conversion;

[0028] An internal combustion engine generator set 2, the internal combustion engine generator set 2 includes an internal combustion engine and a generator, the internal combustion engine drives the generator to operate and generates electricity, the internal combustion engine drives the generator to rotate with combustible gas as fuel gas source, and the working time of the internal combustion engine generator set 2 is concentrated in the peak flat section of the power grid price, and the electric energy generated by the internal combustion engine generator set 2 is supplied to the power grid, so that the high electricity demand in the peak flat period of the power grid can be reduced, and the electricity cost can be reduced;

[0029] A biomass gas steam boiler 3, the biomass gas steam boiler 3 receives combustible gas and burns to produce heat, and the steam heat energy produced by the biomass gas steam boiler 3 is supplied to external user end, which utilizes clean energy to produce heat and supplies user end as required, and the working time of the biomass gas steam boiler 3 is concentrated in the valley section of the power grid price, so that the electricity heating cost can be reduced, and the combustible gas produced by the biomass gasification furnace 1 is received by the biomass gas steam boiler 3 and the internal combustion engine generator set 2 through a gas pipeline 4, and an electric regulating valve for controlling the gas supply state of the internal combustion engine generator set 2 and the biomass gas steam boiler 3 is installed on the gas pipeline 4 to complete the supply of combustible gas according to demand.

[0030] The system can reduce the comprehensive energy cost, the internal combustion engine generator set operates in the peak flat section of the power grid price, utilizes biomass combustible gas to generate electricity, and the high electricity demand in the peak period of the power grid can be reduced, the biomass gas steam boiler operates in the valley section of the power grid price, utilizes low-price electricity in the valley section to heat, effectively reduces the comprehensive energy cost of the system, and improves the economy of energy utilization.

[0031] In other embodiments, a waste heat steam boiler 7 is connected to the exhaust gas pipeline 6 of the internal combustion generator set 2, and an economizer 8 is connected to the exhaust gas pipeline of the biomass gas steam boiler 3, the waste heat steam boiler 7 and the economizer 8 utilize the waste heat of the flue gas to provide steam heat energy, effectively recycling and reusing the waste heat of the flue gas, and the exhaust gas pipelines of the internal combustion generator set 2 and the biomass gas steam boiler 3 converge and are connected to an external exhaust chimney 9, facilitating subsequent centralized emission and treatment of the flue gas.

[0032] In other embodiments, the biomass gas steam boiler 3 is connected to an external deoxygenation device 10, the deoxygenation device 10 provides steam water for the biomass gas steam boiler 3 and the waste heat steam boiler 7 through a deoxygenated water pipeline 11, the deoxygenated water can avoid corrosion of the pipeline and the heat supply equipment, the deoxygenated water pipeline has a deoxygenated water pump 22 for promoting the flow of the deoxygenated water, the deoxygenated water pipeline 11 is connected to the economizer 8 and the waste heat steam boiler 7, and the deoxygenated water entering the biomass gas steam boiler absorbs the waste heat of the flue gas of the biomass gas steam boiler through the economizer. The waste heat steam boiler utilizes the waste heat of the flue gas of the internal combustion generator set to generate steam.

[0033] In other embodiments, a cylinder liner water circulation pipeline 12 is connected to the cylinder liner of the internal combustion engine of the internal combustion generator set 2, the cylinder liner water circulation pipeline 12 is connected in parallel to a heat supply heat exchanger 13 and a hot water lithium bromide unit 14, the heat supply heat exchanger 13 is connected to an external hot water pipeline 15, the hot water pipeline 15 provides heat energy for users, and the hot water lithium bromide unit 14 is connected to an external cold water pipeline 16, the cold water pipeline 16 meets the cooling needs of users, the system utilizes the waste heat of the internal combustion engine to meet the cooling and heating needs of users, optimizes the energy utilization structure, adapts to various heating or cooling scenarios, and can also reduce the overall energy cost, having good economic efficiency and environmental benefits.

[0034] In other embodiments, the hot water lithium bromide unit 14 is connected to a circulating cooling pipeline 17 for heat dissipation, and the circulating cooling pipeline 17 is connected to a cooling tower 18, the heat generated by the hot water lithium bromide unit 14 during cooling is dissipated by the circulating cooling pipeline 17 and the cooling tower 18, and the cooling tower can dissipate the heat of the cooling water into the air.

[0035] Specifically, the circulating cooling pipeline 17 is connected to a cooling water pump 19, and the effective circulation of the cooling water can ensure the cooling efficiency of the hot water lithium bromide unit 14.

[0036] In other embodiments, a cylinder liner water circulation pump 20 is connected to the cylinder liner water circulation pipeline 12 and is located upstream of the cylinder liner, promoting the flow of the cylinder liner water and completing the subsequent reuse of the waste heat of the cylinder liner water.

[0037] In some other embodiments, a biomass gas purification device 21 is connected to the gas pipeline near the internal combustion generator set 2, which can be a tar removal device by electric capture or a dust removal device, and can prolong the service life of the internal combustion engine.

[0038] The system can improve energy utilization efficiency, and biomass raw materials are gasified by the fluidized bed biomass gasification furnace to produce combustible gas, which is supplied to the internal combustion generator set and the biomass gas steam boiler for utilization, and the waste heat of the internal combustion generator set is recycled and reused by the waste heat steam boiler, the heat exchanger and the hot water lithium bromide unit, and the whole system realizes the cascade utilization of biomass energy and improves the comprehensive utilization rate of energy.

[0039] The system takes biomass raw materials as the main energy source, reduces the dependence on traditional fossil energy, and helps to optimize the energy structure; at the same time, biomass energy is a clean and renewable energy source, and its utilization process is relatively environmentally friendly, which can reduce the emission of pollutants such as carbon dioxide and has significant environmental benefits.

[0040] The system can effectively utilize the power generation during the peak and flat periods of the power grid by reasonably adjusting the operation of the internal combustion generator set during the peak and flat periods of the power grid electricity price and the operation of the biomass gas steam boiler during the valley period of the power grid electricity price, reduce the use of power during the peak and flat periods of the power grid, and realize the multi-stage utilization of energy by using the gasification products of biomass energy, realize the optimal allocation and economic utilization of comprehensive energy, improve the comprehensive energy efficiency, and reduce the comprehensive energy cost.

[0041] For the device and use method disclosed in the embodiments, since they correspond to the method disclosed in the embodiments, the description is relatively simple, and the relevant part can be referred to the method part.

[0042] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope of principles and novel features disclosed herein.

Claims

1. A biomass fluidized bed gasifier heat coupled internal combustion engine power generation system, characterized in that: It comprises: a biomass gasifier (1) which produces combustible gas by using biomass raw material; an internal combustion generator set (2) which generates electricity by using combustible gas as fuel, the working time of the internal combustion generator set (2) is concentrated in the peak flat section of the power grid electricity price, and the electricity generated by the internal combustion generator set (2) is supplied to the power grid; a biomass gas steam boiler (3) which receives combustible gas and produces heat by combustion, the steam heat energy produced by the biomass gas steam boiler (3) is supplied to the user end, the working time of the biomass gas steam boiler (3) is concentrated in the valley section of the power grid electricity price, and the biomass gas steam boiler (3) and the internal combustion generator set (2) both receive the combustible gas produced by the biomass gasifier (1) through a gas pipeline (4), and an electric regulating valve for controlling the gas supply state of the internal combustion generator set (2) and the biomass gas steam boiler (3) is installed on the gas pipeline (4).

2. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 1, wherein, A waste heat steam boiler (7) is connected to the exhaust gas pipeline (6) of the internal combustion generator set (2), a coal economizer (8) is connected to the exhaust gas pipeline of the biomass gas steam boiler (3), the waste heat steam boiler (7) and the coal economizer (8) provide steam heat energy by using waste heat of flue gas, and the exhaust gas pipelines of the internal combustion generator set (2) and the biomass gas steam boiler (3) are connected to an external exhaust chimney (9).

3. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 2, wherein, The biomass gas steam boiler (3) is connected to an external deaerating device (10), the deaerating device (10) provides steam water source for the biomass gas steam boiler (3) and the waste heat steam boiler (7) through a deaerating water pipeline (11), the deaerating water pipeline (11) enters the biomass gas steam boiler (3) and is connected to the coal economizer (8), the deaerating water entering the biomass gas steam boiler (3) absorbs waste heat of flue gas of the biomass gas steam boiler (3) through the coal economizer (8), and the waste heat steam boiler (7) generates steam by using waste heat of flue gas of the internal combustion generator set (2).

4. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 1, wherein, A cylinder liner water circulation pipeline (12) is connected to the cylinder liner of the internal combustion engine of the internal combustion generator set (2), a heat supply heat exchanger (13) and a hot water type lithium bromide unit (14) are connected in parallel to the cylinder liner water circulation pipeline (12), the heat supply heat exchanger (13) is connected to an external hot water pipeline (15), the hot water pipeline (15) provides heat energy for users, and the hot water type lithium bromide unit (14) is connected to an external cold water pipeline (16), which meets the cooling demand of users.

5. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 4, wherein, The hot water type lithium bromide unit (14) is connected to a circulating cooling pipeline (17) for heat dissipation, the circulating cooling pipeline (17) is connected to a cooling tower (18), and the heat generated by the hot water type lithium bromide unit (14) during cooling is dissipated by the circulating cooling pipeline (17) and the cooling tower (18).

6. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 5, wherein, The circulating cooling pipeline (17) is connected to a cooling water pump (19).

7. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 4, wherein, The cylinder liner water circulation pipeline (12) is connected to a cylinder liner water circulation pump (20) upstream of the cylinder liner.

8. The biomass fluidized bed gasifier heat coupled internal combustion engine power generation system according to claim 1, wherein, A biomass gas purification device (21) is connected to the gas pipeline close to the internal combustion generator set (2).

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