A biomass gas cooling system

Abstract

The present invention belongs to the technical field of biomass gasification and co-combustion power generation, and specifically relates to a biomass gas cooling system. The biomass gas cooling system provided by the present invention includes a gas heat exchange device and a deoxygenation device, and also includes a gas heat exchange pipeline, which is arranged in the gas heat exchange device, the deoxygenation device is provided with a deoxygenation water tank, the deoxygenation device has a second liquid inlet and a second liquid outlet, the second liquid outlet of the deoxygenation device is connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline, and the second liquid inlet of the deoxygenation device is connected to the first liquid outlet of the gas heat exchange pipeline through a second pipeline. The biomass gas cooling system provided by the present invention solves the current complex method of using heat transfer oil and other media as intermediate carriers, and achieves the purpose of efficient cooling without causing tar condensation and blockage.

Description

Technical Field

[0001] The invention belongs to the technical field of biomass gasification co-combustion power generation, and in particular relates to a biomass fuel gas cooling system. Background Art

[0002] Biomass power generation technology is an advanced power generation technology that is energy-saving and environmentally friendly. As one of the biomass power generation technologies, biomass gasification and co-combustion power generation technology is increasingly widely used. In biomass gasification and co-combustion power generation technology, biomass undergoes thermal decomposition in the gasifier, which will produce high-temperature biomass gas with a temperature greater than 650°C. If the high-temperature gas is directly transported to a coal-fired boiler for combustion, it will require a larger cross-section gas pipeline to transport the high-temperature gas compared to the low-temperature gas due to the larger specific volume of the high-temperature gas under the same pressure. At the same time, direct transportation of gas exceeding 650°C to a coal-fired boiler can easily cause burning of the coal-fired boiler. Therefore, the high-temperature gas is usually cooled before being transported to a coal-fired boiler for combustion. However, since biomass gas contains a large amount of tar, the tar is prone to condensation and deposition during the cooling process of the high-temperature gas, blocking the gas transportation pipeline, resulting in failure of heat exchange cooling.

[0003] The existing technology generally uses heat transfer oil to cool the high-temperature gas first, and then uses condensed water to cool the heat transfer oil. This process requires two sets of heat exchange systems. The system is complex, maintenance and control are difficult, and the heat loss will increase after multiple heat exchanges. On the other hand, due to the use of a heat transfer oil heat exchange system, in order to ensure that tar in the gas will not precipitate, the temperature of the heat transfer oil needs to be controlled above 170°C. If the temperature is not properly controlled, it is very easy to cause boiling oil, which is very dangerous. In addition, there is a possibility of rupture of the fuel pipeline in the heat transfer oil heat exchange system. Once the pipeline ruptures, it will cause oil pollution. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing biomass gas cooling system is complex, difficult to maintain and control, and has the risk of boiling oil and oil leakage, so a biomass gas cooling system is proposed.

[0005] To this end, the technical solution adopted by the present invention is:

[0006] A biomass gas cooling system includes a gas heat exchange device, and further includes:

[0007] The gas heat exchange pipeline is arranged in the gas heat exchange device and has a first liquid inlet and a first liquid outlet.

[0008] A deoxygenator is provided with a deoxygenated water tank, the deoxygenator having a second liquid inlet and a second liquid outlet, the second liquid outlet of the deoxygenator is connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline, and the second liquid inlet of the deoxygenator is connected to the first liquid outlet of the gas heat exchange pipeline through a second pipeline.

[0009] Furthermore, it also includes a boosting device, which is arranged between the gas heat exchange pipeline and the deoxygenation device, and the boosting device has a third liquid inlet and a third liquid outlet. The third liquid inlet of the boosting device is connected to the second liquid outlet of the deoxygenation device through a first pipeline, and the third liquid outlet of the boosting device is connected to the first liquid inlet of the gas heat exchange pipeline through the first pipeline.

[0010] Furthermore, the gas heat exchange pipeline comprises a first condenser and a second condenser, and the first condenser and the second condenser are arranged side by side in a zigzag shape in the gas heat exchange device.

[0011] Furthermore, the minimum distance H between the center line of the first condenser tube and the center line of the second condenser tube is 70-90 mm;

[0012] The minimum distance h between the center lines of the first condenser tube or the second condenser tube is 160-240 mm.

[0013] Furthermore, the first condenser tube and / or the second condenser tube are bare tubes.

[0014] Furthermore, it also includes a biomass gasification device and a dust removal device which are connected in sequence, and the dust removal device is connected to the gas heat exchange device so that the biomass gas from the biomass gasification device is sent to the gas heat exchange device after dust removal by the dust removal device.

[0015] Furthermore, the dust removal device has an ash outlet to discharge ash from the dust removal device.

[0016] Furthermore, it also includes a steam turbine generator set connected to the deoxygenation device.

[0017] Furthermore, the deoxygenation device is a deaerator, and the boosting device is a boosting water pump.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The biomass gas cooling system provided by the present invention is provided with a gas heat exchange pipeline in a gas heat exchange device, the gas heat exchange pipeline has a first liquid inlet and a first liquid outlet, a deoxygenator, a deoxygenation water tank is provided therein, the deoxygenator has a second liquid inlet and a second liquid outlet, the second liquid outlet of the deoxygenator is connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline, and the second liquid inlet of the deoxygenator is connected to the first liquid outlet of the gas heat exchange pipeline through a second pipeline.

[0020] Through the above arrangement, the water in the deoxygenated water tank is deoxygenated by the deoxygenator to obtain deoxygenated water, and the deoxygenated water enters the gas heat exchange pipeline in the gas heat exchange device through the first pipeline to directly cool the high-temperature biomass gas. Since the water temperature of the deoxygenated water is as high as 170°C or above, the cold end temperature of the gas heat exchanger is increased, and condensation and deposition of tar in the gas due to too low temperature and blocking of the gas transmission pipeline are avoided. At the same time, the deoxygenated water after heat exchange returns to the deoxygenator again, and the heat carried by the deoxygenated water after heat exchange can be transferred to the steam turbine generator set, reducing the steam extraction of the high-temperature section on the steam turbine side and improving the unit efficiency. At the same time, since only deoxygenated water is used to cool the high-temperature biomass gas, the heat transfer oil system is omitted, thereby greatly simplifying the system structure, and effectively solving the problems of complex system, difficult maintenance and control, and the risk of boiling oil and oil leakage caused by inert systems such as heat transfer oil in the existing biomass gas cooling system.

[0021] 2. The biomass gas cooling system provided by the present invention further includes a booster device, which is arranged between the gas heat exchange pipeline and the deoxygenation device, and the booster device has a third liquid inlet and a third liquid outlet. The third liquid inlet of the booster device is connected to the second liquid outlet of the deoxygenation device through a first pipeline, and the third liquid outlet of the booster device is connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline. The present invention boosts the deoxygenated water in the deoxygenation water tank through the booster device to ensure that the deoxygenated water after the booster can overcome the system delay resistance, and at the same time ensure that the high-temperature deoxygenated water does not vaporize.

[0022] 3. The biomass gas cooling system provided by the present invention further has a minimum distance H between the center line of the first condenser pipe and the center line of the second condenser pipe of 70-90 mm; the minimum distance h between the center lines of the first condenser pipe or the second condenser pipe is 160-240 mm. The present invention uses cold radiation to cool the gas. Through the above arrangement, the spacing between the meandering condensers is increased, thereby reducing the contact between the condensers and the high-temperature gas. At the same time, since the gas contains dust, the increase in the spacing between the condensers also reduces the possibility of dust accumulation in the meandering condensers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the biomass gas cooling system of the present invention;

[0025] Figure 2 It is a schematic diagram of a biomass gas cooling system connected to a steam turbine generator set of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the gas heat exchange device of the present invention;

[0027] Figure 4 This is an enlarged view of the local structure of the gas heat exchange pipeline of the present invention;

[0028] The reference numerals are as follows:

[0029] 1. Biomass gasification device; 2. Dust removal device; 3. Gas heat exchange device; 4. Gas heat exchange pipeline; 5. Deoxygenation device; 6. Pressurization device; 7. Steam turbine generator set; 8. First pipeline; 9. Second pipeline; 10. Boiler feed water pump; 11. First condenser; 12. Second condenser; 13. First liquid outlet; 14. First liquid inlet. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 As shown, the present invention provides a biomass gas cooling system, including a gas heat exchange device 3, and also includes a gas heat exchange pipeline 4, which is arranged in the gas heat exchange device 3 and has a first liquid inlet 14 and a first liquid outlet 13, a deoxygenator 5, which is equipped with a deoxygenation water tank, and the deoxygenator 5 has a second liquid inlet and a second liquid outlet. The second liquid outlet of the deoxygenator 5 is connected to the first liquid inlet 14 of the gas heat exchange pipeline 4 through a first pipeline 8, and the second liquid inlet of the deoxygenator 5 is connected to the first liquid outlet 13 of the gas heat exchange pipeline 4 through a second pipeline 9.

[0035] Through the above arrangement, the water in the deoxygenated water tank is deoxygenated by the deoxygenator 5 to obtain deoxygenated water, and the deoxygenated water enters the gas heat exchanger pipeline 4 in the gas heat exchanger 3 through the first pipeline 8 to directly cool the high-temperature biomass gas coming out of the biomass gasification device 1. Since the water temperature of the deoxygenated water is as high as 170°C or above, the temperature of the cold end of the gas heat exchanger (the end where the high-temperature gas begins to enter the gas heat exchanger) is increased, and the condensation and deposition of tar in the gas due to too low temperature and the blocking of the gas transmission pipeline are avoided. At the same time, the deoxygenated water after heat exchange returns to the deoxygenator 5 again, and the heat carried by the deoxygenated water after heat exchange can be transferred to the steam turbine generator set 7, reducing the steam extraction of the high-temperature section on the steam turbine side and improving the unit efficiency. At the same time, since only deoxygenated water is used to cool the high-temperature biomass gas, the heat transfer oil system is omitted, thereby greatly simplifying the system structure, and effectively solving the problems of complex system, difficult maintenance and control, and the risk of boiling oil and oil leakage caused by inert systems such as heat transfer oil in the existing biomass gas cooling system.

[0036] The present invention applies the above-mentioned biomass gas cooling system to the biomass gasification co-combustion power generation system to cool the high-temperature biomass gas, which solves the current complex method of using heat transfer oil and other media as intermediate carriers, and achieves the purpose of efficient cooling without causing tar condensation and blockage. At the same time, the above-mentioned biomass gas cooling system of the present invention omits the heat transfer oil system, which greatly simplifies the system structure and improves the utilization value of the heat after heat exchange.

[0037] In an optional embodiment, a booster device 6 is further included, which is arranged between the gas heat exchange installation pipeline 4 and the deoxygenation device 5. The booster device 6 has a third liquid inlet and a third liquid outlet. The third liquid inlet of the booster device 6 is connected to the second liquid outlet of the deoxygenation device 5 through the first pipeline 8, and the third liquid outlet of the booster device 6 is connected to the first liquid inlet 14 of the gas heat exchange installation pipeline 4 through the first pipeline 8. The present invention boosts the deoxygenated water in the deoxygenation water tank through the booster device to ensure that the deoxygenated water after the booster can overcome the system delay resistance and ensure that the high-temperature deoxygenated water does not vaporize. Optionally, the booster device 6 is a water pump. The booster water pump pressurizes the deoxygenated water, and optionally, the pressure is 0.1-1.6MPa.

[0038] In an alternative embodiment, if Figure 3 As shown, the gas heat exchange pipeline 4 has a first condenser 11 and a second condenser 12, and the first condenser 11 and the second condenser 12 are arranged side by side in a zigzag shape in the gas heat exchange device 3. Optionally, as Figure 4 As shown, the minimum distance H between the center line of the first condenser 11 and the center line of the second condenser 12 is 70-90mm; the minimum distance h between the center lines of the first condenser 11 or the second condenser 12 is 160-240mm. The present invention cools the gas by cold radiation. Through the above-mentioned arrangement, the spacing between the meandering condensers is increased, so that the contact between the condensers and the high-temperature gas is reduced. At the same time, since the gas contains dust, the increase in the spacing between the condensers also reduces the possibility of dust accumulation in the meandering condensers. Optionally, the first condenser 11 and / or the second condenser 12 are bare tubes. Optionally, both the first condenser 11 and the second condenser 12 are bare tubes. In the present invention, the bare tube refers to a condenser whose outer surface is not coated with a thermal insulation coating. The present invention is conducive to increasing the flow of gas and cooling and controlling the gas by setting the condenser as a bare tube.

[0039] In an optional embodiment, it also includes a biomass gasification device 1 and a dust removal device 2 which are connected in sequence, and the dust removal device 2 is connected to the gas heat exchange device 3, so that the biomass gas from the biomass gasification device 1 is sent to the gas heat exchange device 3 after dust removal by the dust removal device 2.

[0040] In an optional embodiment, the biomass gasification device 1 is a gasifier, and biomass, such as straw, is thermally decomposed in the gasifier to produce high-temperature combustion gas, the temperature of which is greater than 650°C, and the high-temperature combustion gas can directly enter the gas heat exchange device 3 to cool the high-temperature combustion gas. Optionally, the gas heat exchange device 3 is a gas heat exchanger, and the gas heat exchanger is a countercurrent heat exchanger. The high-temperature combustion gas passes through the gas heat exchanger, and the gas temperature drops to 350-450°C. The cooled biomass combustion gas can enter the subsequent process for use, for example, the cooled biomass combustion gas is passed into a coal-fired boiler for combustion. Optionally, the deoxygenation device 5 is a deaerator, and a deoxygenation water tank is provided in the deaerator. The water in the deoxygenation water tank is deoxygenated by the deaerator to obtain deoxygenated water, and the temperature of the deoxygenated water is greater than 150°C. Preferably, the temperature of the deoxygenated water is greater than 170°C. Since water has high specific heat and high stability, the present invention utilizes deoxygenated water with a temperature greater than 150°C as a cooling source for cooling high-temperature fuel gas, eliminating the need for a heat transfer oil heat exchange system, greatly simplifying the fuel gas cooling system, and making the system easy to operate and highly stable.

[0041] In an optional embodiment, the dust removal device 2 has an ash outlet to discharge the ash from the dust removal device 2. The present invention arranges the dust removal device 2 between the biomass gasification device 1 and the gas heat exchange device 3, and removes dust from the high-temperature gas coming out of the biomass gasification device 1 through the dust removal device 2, thereby reducing the influence of dust in the gas on subsequent processes, and especially effectively avoiding the dust in the gas from being deposited on the surface of the gas heat exchange pipe 4 in the gas heat exchange device 3, thereby affecting the heat exchange effect.

[0042] In an alternative embodiment, if Figure 2 As shown, it also includes a steam turbine generator set 7, which is connected to the deoxygenator 5. In the present invention, the high-temperature energy carried by the deoxygenated water that has undergone heat exchange through the gas heat exchanger 3 can be transferred to the steam turbine generator set 7, effectively reducing the steam extraction in the high-temperature section of the steam turbine side and improving the unit efficiency. Optionally, the deoxygenator 5 can be used as a link in the biomass gasification and co-combustion power generation process and participate in the biomass gasification and co-combustion power generation process. For example, the deoxygenator 5 can also be connected to the boiler feed water pump 10 and perform subsequent processes in the power generation process.

[0043] In the present invention, biomass, such as straw, is thermally decomposed in a gasifier to produce high-temperature combustion gas, the temperature of which is greater than 650°C. The high-temperature combustion gas first enters the dust removal device 2 to remove dust from the biomass combustion gas, and ash is discharged from the ash outlet of the dust removal device 2. The biomass combustion gas after dust removal enters the gas heat exchanger for cooling, and the combustion gas temperature drops to 350-450°C. The cooled biomass combustion gas can enter subsequent processes for use, for example, the cooled biomass combustion gas is passed into a coal-fired boiler for combustion. In the deoxygenation device 5, the water in the deoxygenation water tank is deoxygenated by the deoxygenation device 5 to obtain deoxygenated water, the temperature of which is greater than 150°C, and preferably, the temperature of the deoxygenated water is greater than 170°C. The deoxygenated water is pressurized to 0.1-1.6MPa by the booster 6, and the pressurized deoxygenated water enters the gas heat exchanger pipeline 4 through the first pipeline 8, where the high-temperature gas is cooled down and the deoxygenated water is heated by heat exchange. The deoxygenated water after heat exchange and heating returns to the deoxygenator 5 through the second pipeline 9, and the heat it carries can be transferred to the steam turbine generator set 7 to improve the efficiency of the unit.

[0044] The technical solution of the present invention is described below by specific implementation methods:

[0045] Example 1

[0046] This embodiment provides a biomass gas cooling system, such as Figure 1 As shown, it includes a gas heat exchange device 3, and also includes a gas heat exchange pipeline 4, which is arranged in the gas heat exchange device 3 and has a first liquid inlet 14 and a first liquid outlet 13, a deoxygenator 5, which is equipped with a deoxygenation water tank, and the deoxygenator 5 has a second liquid inlet and a second liquid outlet. The second liquid outlet of the deoxygenator 5 is connected to the first liquid inlet 14 of the gas heat exchange pipeline 4 through a first pipeline 8, and the second liquid inlet of the deoxygenator 5 is connected to the first liquid outlet 13 of the gas heat exchange pipeline 4 through a second pipeline 9.

[0047] Furthermore, it also includes a booster device 6, which is arranged between the gas heat exchange pipe 4 and the deoxygenation device 5, and the booster device 6 has a third liquid inlet and a third liquid outlet. The third liquid inlet of the booster device 6 is connected to the second liquid outlet of the deoxygenation device 5 through the first pipe 8, and the third liquid outlet of the booster device 6 is connected to the first liquid inlet 14 of the gas heat exchange pipe 4 through the first pipe 8. Optionally, the booster device 6 is a booster water pump. The booster water pump boosts the deoxygenated water, and optionally, the pressure is 0.1-1.6MPa.

[0048] Furthermore, it also includes a biomass gasification device 1 and a dust removal device 2 which are connected in sequence, and the dust removal device 2 is connected to the gas heat exchange device 3 so that the biomass gas from the biomass gasification device 1 is sent to the gas heat exchange device 3 after dust removal by the dust removal device 2.

[0049] Specifically, the biomass gasification device 1 is a gasifier, and biomass, such as straw, is thermally decomposed in the gasifier to produce high-temperature combustion gas, the temperature of which is greater than 650°C, and the high-temperature combustion gas can directly enter the gas heat exchange device 3 to cool the high-temperature combustion gas. Optionally, the high-temperature combustion gas passes through the gas heat exchanger, and the combustion gas temperature drops to 350-450°C. The cooled biomass combustion gas can enter the subsequent process for use. Optionally, the deoxygenation device 5 is a deaerator, and a deoxygenation water tank is provided in the deaerator. The water in the deoxygenation water tank is deoxygenated by the deaerator to obtain deoxygenated water. The temperature of the deoxygenated water is greater than 150°C. Preferably, the temperature of the deoxygenated water is greater than 170°C. Optionally, the dust removal device 2 has an ash outlet to discharge ash from the dust removal device 2.

[0050] Example 2

[0051] This embodiment provides a biomass gas cooling system. Based on the above embodiment 1, Figure 3 As shown, the gas heat exchange pipeline 4 has a first condenser 11 and a second condenser 12, and the first condenser 11 and the second condenser 12 are arranged side by side in a zigzag shape in the gas heat exchange device 3. Figure 4 As shown, the minimum distance H between the center line of the first condenser tube 11 and the center line of the second condenser tube 12 is 70-90 mm; the minimum distance h between the center lines of the first condenser tube 11 or the second condenser tube 12 is 160-240 mm. Optionally, the first condenser tube 11 and / or the second condenser tube 12 are bare tubes. Optionally, both the first condenser tube 11 and the second condenser tube 12 are bare tubes.

[0052] Example 3

[0053] This embodiment provides a biomass gas cooling system. Based on the above embodiment 1 or 2, Figure 2 As shown, the steam turbine generator set 7 is also included, which is connected to the deoxygenator 5. The high-temperature energy carried by the deoxygenated water after heat exchange through the gas heat exchanger 3 can be transferred to the steam turbine generator set 7, which can effectively reduce the steam extraction of the high-temperature section of the steam turbine side and improve the unit efficiency. Optionally, the deoxygenator 5 can also be connected to the boiler feed water pump 10.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A biomass gas cooling system, comprising a gas heat exchange device, characterized in that: Also includes, A gas heat exchange pipeline, arranged in the gas heat exchange device, having a first liquid inlet and a first liquid outlet, a deaerator, a deaerator water tank, the deaerator having a second liquid inlet and a second liquid outlet, the second liquid outlet of the deaerator being connected to the first liquid inlet of the gas heat exchange pipeline through a first pipeline, and the second liquid inlet of the deaerator being connected to the first liquid outlet of the gas heat exchange pipeline through a second pipeline; The gas heat exchange pipeline comprises a first condenser and a second condenser, and the first condenser and the second condenser are arranged side by side in a zigzag shape in the gas heat exchange device; The minimum distance H between the center line of the first condenser pipe and the center line of the second condenser pipe is 70-90 mm; The minimum distance h between the center lines of the first condenser tube or the second condenser tube is 160-240 mm.

2. The biomass gas cooling system according to claim 1, characterized in that: It also includes a boosting device, which is arranged between the gas heat exchange pipeline and the deoxygenation device. The boosting device has a third liquid inlet and a third liquid outlet. The third liquid inlet of the boosting device is connected to the second liquid outlet of the deoxygenation device through a first pipeline, and the third liquid outlet of the boosting device is connected to the first liquid inlet of the gas heat exchange pipeline through the first pipeline.

3. The biomass gas cooling system according to claim 1, characterized in that: The first condenser tube and / or the second condenser tube are bare tubes.

4. The biomass gas cooling system according to claim 1, characterized in that: It also includes a biomass gasification device and a dust removal device which are connected in sequence. The dust removal device is connected to the gas heat exchange device so that the biomass gas from the biomass gasification device is sent to the gas heat exchange device after dust removal by the dust removal device.

5. The biomass gas cooling system according to claim 4, characterized in that: The dust removal device has an ash outlet to discharge ash from the dust removal device.

6. The biomass gas cooling system according to claim 1, characterized in that: It also includes a steam turbine generator set connected to the deoxidation device.

7. The biomass gas cooling system according to claim 2, characterized in that: The deoxygenation device is a deaerator, and the boosting device is a boosting water pump.

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