Biomass gasification comprehensive energy system coupled with gas power generation and steam heat pump

Abstract

The utility model discloses a biomass gasification comprehensive energy system coupled with gas power generation and a steam heat pump, which comprises a biomass gasification furnace and a gas storage tank, and the gas storage tank is communicated with the biomass gasification furnace through a pipeline; the gas inlet end of the biomass gas boiler communicates with a gas outlet in the lower end of the gas storage tank, and the gas outlet end of the biomass gas boiler conveys high-temperature steam to a heat supply system of a user; the gas turbine generator set is communicated with a gas outlet in the upper end of the gas storage tank through a pipeline so as to carry out biomass gas power generation; and the steam heat pump unit is electrically connected with the gas turbine generator unit, and the steam heat pump unit utilizes the waste heat to generate high-temperature steam and conveys the high-temperature steam to a heat supply system. The biomass gasification furnace, the gas turbine generator set and the steam heat pump set are coupled to jointly meet the steam requirement of a user, the gas turbine generator set provides electric power for the steam heat pump set, meanwhile, the electricity utilization requirement of the user is met, and the comprehensive utilization efficiency of energy is improved.

Description

Technical Field

[0001] This utility model relates to the field of biomass gasification technology, and more specifically to a biomass gasification integrated energy system that couples gasification power generation and steam heat pump. Background Technology

[0002] Biomass is a zero-carbon, renewable energy source and a green energy utilization technology that receives active support and encouragement from the state. Biomass gasification technology converts various biomass raw materials such as wood, straw, and rice husks into combustible gas through pyrolysis and gasification processes. This gas serves as the primary energy source for biomass gas boilers and power generation processes, meeting users' end-use energy needs.

[0003] In heating applications, biomass typically first enters a biomass gasifier to produce biomass gas, which is then burned in a boiler to generate steam to meet user requirements. Under this process, when the user's steam load decreases, the output of the biomass gasification system also decreases, leading to reduced system efficiency, underutilization of assets, and reduced system economics.

[0004] Therefore, how to provide a combined heat and power system that can couple a gas generator set and a steam heat pump unit, and flexibly adjust the gas supply and power generation gas ratio according to changes in user steam load and electricity load, so as to improve the overall energy utilization efficiency, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a biomass gasification integrated energy system that couples gas-fired power generation and steam heat pump. The system process couples a biomass gas boiler, a gas turbine generator set, a waste heat boiler, and a steam heat pump unit. The high-temperature steam generated by the biomass gas boiler, waste heat boiler, and steam heat pump unit together meets the user's steam demand. Part of the electricity generated by the gas turbine generator set provides power to the steam heat pump unit, and the remainder meets the user's electricity demand.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A biomass gasification integrated energy system coupling gas-fired power generation and steam heat pump includes:

[0008] Biomass gasification furnace,

[0009] A gas storage tank, the gas inlet of which is connected to the gas outlet of the biomass gasification furnace via a pipeline;

[0010] A biomass gas boiler, wherein the inlet end of the biomass gas boiler is connected to the outlet end of the lower end of the gas storage tank, and the outlet end delivers high-temperature steam to the user's heating system.

[0011] A gas turbine generator set, wherein the gas turbine generator set is connected to the gas outlet at the upper end of the gas storage tank through a pipeline to generate biomass gas and supply it to the user's power supply system;

[0012] A steam heat pump unit is electrically connected to the gas turbine generator set; the steam heat pump unit is connected to the biomass gasification furnace through pipelines to utilize waste heat to generate high-temperature steam and deliver it to the heating system.

[0013] The beneficial effects of this utility model are as follows: the biomass gas produced by the biomass gasifier enters the gas storage tank. The gas with a high impurity content is located below the gas storage tank and enters the biomass gas boiler for secondary combustion. The biomass gas boiler generates high-temperature steam by burning the biomass gas and delivers it to the user's heating system. The gas with a low impurity content is located above the gas storage tank and enters the gas turbine generator set. The gas turbine generator set uses the biomass gas to generate electricity and delivers it to the user's power supply system. The steam heat pump unit is driven by the electricity generated by the gas turbine generator set, absorbs heat from the surrounding air and the waste heat from the biomass gasifier to generate high-temperature steam and delivers it to the user's heating system. This utility model couples the biomass gasifier, biomass gas boiler, gas turbine generator set, waste heat boiler, and steam heat pump unit to form a comprehensive energy system. The high-temperature steam generated by the biomass gas boiler, waste heat boiler, and steam heat pump unit jointly meets the user's steam demand. Part of the electricity generated by the gas turbine generator set provides power to the steam heat pump unit, and the remainder meets the user's electricity demand.

[0014] Preferably, the gas turbine generator set includes a gas turbine and a generator. The gas turbine is connected to the gas outlet at the top of the gas storage tank via a pipeline. The generator is driven by the gas turbine to generate electricity and supply it to the power supply system. The generator is electrically connected to the steam heat pump unit. The gas turbine uses the clean biomass gas at the top of the gas storage tank to drive the generator and generate electricity. Part of the electricity generated by the generator supplies the user's power supply system, and the other part provides a power source for driving the steam heat pump unit.

[0015] Preferably, the system also includes a waste heat boiler, which is connected to the exhaust port of the gas turbine to utilize the waste heat from the high-temperature flue gas to generate high-temperature steam and deliver it to the heating system. The waste heat boiler utilizes the waste heat from the exhaust gas of the gas turbine generator set to generate high-temperature steam, which is then delivered to the user.

[0016] Preferably, a gas compressor is fixed on the pipeline between the gas turbine and the gas storage tank. The gas compressor pressurizes the clean biomass gas above the gas storage tank to meet the combustion requirements of the gas turbine generator set.

[0017] Preferably, a cyclone dust collector is fixed on the pipeline between the biomass gasifier and the gas storage tank. The cyclone dust collector is used to remove particulate impurities from the biomass gas.

[0018] Preferably, a gas-fired fan is fixed on the pipeline between the cyclone dust collector and the biomass gasifier. The gas-fired fan draws the biomass gas from the biomass gasifier into the gas storage tank, improving system operating efficiency.

[0019] Preferably, the system also includes a cooling water pump, the inlet of which is connected to the biomass gasifier, and the outlet of which is connected to the steam heat pump unit. The steam heat pump unit is connected to the biomass gasifier via a water pipe. The cooling water from the biomass gasifier, at approximately 50°C, is pumped into the heat exchanger of the steam heat pump unit. After heat exchange, the temperature drops to approximately 20°C and flows back to the cooling water jacket of the biomass gasifier via the water pipe. The high-temperature steam generated by the steam heat pump unit is circulated to the user's heating system via the heat pump.

[0020] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a biomass gasification integrated energy system that couples gas-fired power generation and steam heat pump. It couples a biomass gasifier, a gas turbine generator set, a steam heat pump unit, and a biomass gas boiler. The biomass gas boiler, gas turbine generator set, and steam heat pump unit jointly meet the user's steam demand. The gas turbine generator set provides electricity to the steam heat pump unit, while the remaining electricity meets the user's electricity demand. Through the combination of heat and electricity, the ratio of gas supply and power generation can be flexibly adjusted according to changes in the user's steam load and electricity load, thereby improving the comprehensive energy utilization efficiency and ensuring the system's economic efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A schematic diagram of the integrated energy system connection provided by this utility model.

[0023] in,

[0024] 1-Biomass gasifier; 2-Gas storage tank; 3-Biomass gas boiler; 4-Gas turbine generator set; 41-Gas turbine; 42-Generator; 5-Cooling water pump; 6-Steam heat pump unit; 7-Power supply system; 8-Heating system; 9-Steam boiler makeup water system; 10-Gas blower; 11-Cyclone dust collector; 12-Compressor; 13-Waste heat boiler. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model discloses a biomass gasification integrated energy system that couples gasification power generation and steam heat pump, including:

[0027] Biomass gasifier 1 produces biomass gas through the pyrolysis and gasification of biomass such as wood and rice husks;

[0028] Gas storage tank 2, the gas inlet of gas storage tank 2 is connected to the gas outlet of biomass gasification furnace 1 through a pipeline;

[0029] The biomass gas boiler 3 has its inlet end connected to the outlet end of the gas storage tank 2, and the outlet end delivers high-temperature steam to the user's heating system 8.

[0030] Gas turbine generator set 4, the gas turbine generator set 4 is connected to the gas outlet at the upper end of the gas storage tank 2 through the pipeline to generate biomass gas and deliver it to the user's power supply system 7;

[0031] Steam heat pump unit 6 is electrically connected to gas turbine generator set 4; steam heat pump unit 6 is connected to biomass gasifier 1 through pipeline to utilize waste heat to generate high-temperature steam and deliver it to heating system 8.

[0032] In this embodiment, the gas turbine generator set 4 includes a gas turbine 41 and a generator 42. The gas turbine 41 is connected to the gas outlet at the upper end of the gas storage tank 2 through a pipeline. The generator 42 is driven by the gas turbine 41 to generate electricity and transmit it to the power supply system 7. The generator 42 is electrically connected to the steam heat pump unit 6.

[0033] The gas turbine uses clean biomass gas above the gas storage tank to do work and drive the generator. Part of the electricity generated by the generator is supplied to the user's power supply system, and the other part drives the start-up of the steam heat pump unit.

[0034] In this embodiment, a waste heat boiler 13 is also included. The waste heat boiler 13 is connected to the exhaust port of the gas turbine 41 to utilize the waste heat of the high-temperature flue gas to generate high-temperature steam and deliver it to the heating system 8.

[0035] Waste heat boilers utilize the waste heat from the exhaust gas of gas turbine generator sets to generate high-temperature steam, which is then delivered to users.

[0036] To further optimize the above technical solution and improve the working efficiency of the gas turbine, a gas compressor 12 is fixed on the pipeline between the gas turbine 41 and the gas storage tank 2.

[0037] To further optimize the above technical solution and ensure the cleanliness of the biomass gas, a cyclone dust collector 11 is fixed on the pipeline between the biomass gasifier 1 and the gas storage tank 2. The cyclone dust collector is used to remove particulate impurities from the biomass gas.

[0038] To further optimize the above technical solution and improve the system operating efficiency, a gas fan 10 is fixed on the pipeline between the cyclone dust collector 11 and the biomass gasifier 1.

[0039] This embodiment uses a biomass gasifier coupled with a gas turbine generator set and a generator set and a steam heat pump unit. The combustible gas after biomass gasification is purified and separated by a cyclone dust collector. The biomass gas with a high tar content directly enters the biomass gas boiler for combustion to generate steam to meet user needs.

[0040] Biomass gas with low tar content enters the gas turbine generator set for combustion and expansion, which in turn drives the generator set to generate electricity. The generated electricity can meet the electricity demand of users on the one hand, and drive the steam heat pump unit to generate steam to meet the user demand on the other hand. At the same time, the waste heat of the flue gas from the gas turbine generator set can enter the waste heat boiler to generate steam, which, together with the above-mentioned equipment, can meet the user's steam demand.

[0041] To further optimize the above technical solution, a cooling water pump 14 is also included. The inlet of the cooling water pump 14 is connected to the biomass gasifier 1, and the outlet is connected to the steam heat pump unit 6. The steam heat pump unit 6 is connected to the cooling water system of the biomass gasifier 1 through a water pipe.

[0042] The cooling water from the biomass gasifier, heated to approximately 50°C, is pumped into the heat exchanger of the steam heat pump unit. After heat exchange, the temperature drops to approximately 20°C and flows back to the biomass gasifier's cooling water jacket via water pipes. The steam heat pump unit is driven by electricity generated by a gas turbine generator set. It absorbs heat from the surrounding air and waste heat from the biomass gasifier's cooling water, using the heat pump cycle to generate high-temperature steam which is then delivered to the user.

[0043] In this embodiment, the steam boiler water supply system 9 is used for the system water supply required by the waste heat boiler 13, the biomass gas boiler 3, and the steam heat pump unit 6.

[0044] The integrated energy system provided in this embodiment involves biomass gas with high tar content in the gas storage tank entering the biomass gas boiler for combustion, and the resulting high-temperature steam being provided to the user's heating system.

[0045] Clean biomass gas with low tar content enters the gas turbine to do work. The work generated drives the generator to generate electricity. Part of the electricity generated by the generator is supplied to the user's power supply system, and the other part drives the operation of the steam heat pump unit. The steam heat pump unit absorbs heat from the surrounding air and waste heat from the cooling water of the biomass gasifier, and the generated high-temperature steam is delivered to the user.

[0046] The flue gas generated at the exhaust port of the gas turbine generator set enters the waste heat boiler for combustion, and the high-temperature steam generated is provided to the user's heating system.

[0047] This system couples the high-temperature steam generated by the waste heat boiler, biomass gas boiler, and steam heat pump unit. At the same time, the generator set achieves electrothermal coupling with the waste heat boiler, biomass gas boiler, and steam heat pump unit, together to meet the user's electricity and gas needs.

[0048] In some other specific embodiments, the system introduces a control system to adjust the flow of biomass gas entering the biomass gasifier and the biomass gas boiler and gas turbine generator set according to changes in user-end heat and electricity load, thereby improving the system's adjustment and control flexibility and better meeting user needs.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biomass gasification integrated energy system coupling gas power generation and steam heat pump, characterized in that, include: Biomass gasification furnace (1), Gas storage tank (2), the gas inlet of the gas storage tank (2) is connected to the gas outlet of the biomass gasification furnace (1) through a pipeline; Biomass gas boiler (3), the inlet end of the biomass gas boiler (3) is connected to the outlet at the lower end of the gas storage tank (2), and the outlet end delivers high-temperature steam to the user's heating system (8); Gas turbine generator set (4), the gas turbine generator set (4) is connected to the gas outlet at the upper end of the gas storage tank (2) through a pipeline to generate biomass gas and deliver it to the user's power supply system (7); A steam heat pump unit (6) is electrically connected to the gas turbine generator set (4); the steam heat pump unit (6) is connected to the biomass gasifier (1) through a pipeline to generate high-temperature steam using waste heat and deliver it to the heating system (8).

2. The integrated energy system of claim 1, wherein, The gas turbine generator set (4) includes a gas turbine (41) and a generator (42). The gas turbine (41) is connected to the gas outlet at the upper end of the gas storage tank (2) through a pipeline. The generator (42) is driven by the gas turbine (41) to generate electricity and transmit it to the power supply system (7). The generator (42) is electrically connected to the steam heat pump unit (6).

3. The integrated energy system of claim 2, wherein, It also includes a waste heat boiler (13), which is connected to the exhaust port of the gas turbine (41) to generate high-temperature steam by utilizing the waste heat of the high-temperature flue gas and deliver it to the heating system (8).

4. The integrated energy system of claim 2, wherein, A gas compressor (12) is fixed on the pipeline between the gas turbine (41) and the gas storage tank (2).

5. The biomass gasification integrated energy system coupled with gas-fired power generation and a steam heat pump according to claim 1, characterized in that, A cyclone dust collector (11) is fixed on the pipeline between the biomass gasifier (1) and the gas storage tank (2).

6. The integrated energy system of claim 5, wherein, A gas-fired blower (10) is fixed on the pipeline between the cyclone dust collector (11) and the biomass gasifier (1).

7. The integrated energy system of claim 1, wherein, It also includes a cooling water pump (5), the inlet of which is connected to the biomass gasifier (1), and the outlet of which is connected to the steam heat pump unit (6); the steam heat pump unit (6) is connected to the cooling water system of the biomass gasifier (1) through a water pipe.

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