Energy-saving system used in process of synthesizing high-quality raw materials through organic matter gasification

Abstract

The utility model discloses an energy-saving system used in the process of synthesizing high-quality raw materials through organic matter gasification. The energy-saving system comprises a membrane deoxidizing device, a deoxidizing water tank, a pressure pump, a cold deoxidizing water main pipe, a reaction device, a heat exchanger, a hot deoxidizing water main pipe and a water tank which are connected in sequence. No dead steam is discharged in the whole process of the system, so that energy is saved; and the problem of waste of a large amount of low-grade steam caused by working condition fluctuation is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of energy conservation and environmental protection technology, specifically relating to an energy-saving system used in the process of synthesizing high-quality raw materials through the gasification of organic matter. Background Technology

[0002] In the process of using biomass, coal and other organic matter to gasify and synthesize methane, methanol, olefins and other high-quality raw materials, a large amount of high-grade steam will be consumed and a large amount of low-grade waste heat steam will be produced as a by-product. This steam is often used as the heat source of thermal deaerator to remove dissolved oxygen from demineralized water and heat the demineralized water to a suitable temperature. This process will result in serious energy waste: (1) Although theoretically the amount of waste steam emitted during the deoxygenation process of thermal deaerator is not large, in actual operation, in order to cope with the fluctuation of working conditions and ensure the quality of deoxygenated water, the on-site personnel usually use the waste steam of thermal deaerator to reduce the amount of waste steam emitted during the deoxygenation process. (1) The discharge valve is kept at a large opening, resulting in the exhaust steam discharge volume far exceeding the deoxygenation demand, resulting in serious energy waste; (2) During the process of organic matter gasification to synthesize high-quality raw materials, a large amount of waste heat will be generated. Usually, demineralized water and condensate are used for heat exchange before being sent to the thermal deaerator for deoxygenation. The temperature of the demineralized water and condensate sent to the thermal deaerator is basically sufficient to meet the process requirements. The steam introduced is only used for deoxygenation and is basically discharged in the form of exhaust steam, resulting in serious waste of steam; (3) A large amount of low-grade steam produced by the by-product is difficult to be effectively utilized due to fluctuations in operating conditions, and often results in venting.

[0003] Therefore, new energy-saving systems need to be developed to solve the above problems. Utility Model Content

[0004] Technical problem solved: To address the above-mentioned technical problems, this utility model provides an energy-saving system for the process of synthesizing high-quality raw materials through the gasification of organic matter. The entire process has no exhaust steam emissions, thus achieving energy saving; and avoids the problem of a large amount of low-grade steam wastage caused by fluctuations in operating conditions.

[0005] Technical solution: An energy-saving system for the process of synthesizing high-quality raw materials by organic matter gasification, comprising a membrane deoxygenation device, a deoxygenation water tank, a pressurization pump, a cold deoxygenation water header, a reaction device and heat exchanger, a hot deoxygenation water header and water tank connected in sequence.

[0006] Preferably, the membrane deoxygenation device is a hollow fiber membrane contact deoxygenator.

[0007] Preferably, the reaction apparatus and heat exchanger are gasifiers, waste heat boilers, conversion devices, or high-quality raw material synthesis devices.

[0008] Preferably, the water tank has a heating steam inlet.

[0009] Preferably, multiple units or multiple pipes of the pressurization pump, cold deoxygenated water main pipe, reaction device and heat exchanger, hot deoxygenated water main pipe and water tank are provided according to the process pressure requirements.

[0010] Furthermore, the pressurizing pump includes a high-pressure pump, a medium-pressure pump, and a low-pressure pump; the cold deoxygenated water header includes a high-pressure cold demineralized water header, a medium-pressure cold demineralized water header, and a low-pressure cold demineralized water header; the hot deoxygenated water header includes a high-pressure hot demineralized water header, a medium-pressure hot demineralized water header, and a low-pressure hot demineralized water header; and the water tank includes a high-pressure water tank, a medium-pressure water tank, and a low-pressure water tank.

[0011] The outlet of the deoxygenated water tank is connected to the inlet of the high-pressure pump, medium-pressure pump, and low-pressure pump, respectively. The inlet of each reaction device and heat exchanger is connected to the outlet of the high-pressure pump, medium-pressure pump, and low-pressure pump in sequence through the high-pressure cold demineralized water header, medium-pressure cold demineralized water header, and low-pressure cold demineralized water header, respectively. The outlet of each reaction device and heat exchanger is connected to the inlet of the high-pressure water tank, medium-pressure water tank, and low-pressure water tank in sequence through the high-pressure hot demineralized water header, medium-pressure hot demineralized water header, and low-pressure hot demineralized water header, respectively. The number of reaction devices and heat exchangers is 4.

[0012] Beneficial effects: The deionized water is first deoxygenated by a membrane deaerator, then sent to the reactor and heat exchanger for heat absorption, and then heated to a suitable temperature by a water tank. There is no exhaust steam emission in the whole process, thus achieving energy saving.

[0013] After being sent to the reaction unit and heat exchanger, the deoxygenated water does not convert into low-grade steam except for process requirements and the preparation of high-grade steam. Instead, it exists as pressurized deoxygenated water, which is easy to store and can be used in various ways, such as reducing pressure to prepare saturated steam or sending it to the boiler to prepare high-grade steam. This avoids the problem of a large amount of low-grade steam being wasted due to fluctuations in operating conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an energy-saving system for the process of synthesizing high-quality raw materials by organic matter gasification according to this utility model;

[0015] The numbers in the diagram are as follows: 1. Membrane deoxygenation device; 2. Deoxygenated water tank; 3. Booster pump; 301. High-pressure pump; 302. Medium-pressure pump; 303. Low-pressure pump; 4. Cold deoxygenated water header; 401. High-pressure cold demineralized water header; 402. Medium-pressure cold demineralized water header; 403. Low-pressure cold demineralized water header; 5. Reaction device and heat exchanger; 6. Hot deoxygenated water header; 601. High-pressure hot demineralized water header; 602. Medium-pressure hot demineralized water header; 603. Low-pressure hot demineralized water header; 7. Water tank; 701. High-pressure water tank; 702. Medium-pressure water tank; 703. Low-pressure water tank. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings. Example 1

[0017] Reference Figure 1 An energy-saving system for the process of synthesizing high-quality raw materials through organic matter gasification includes a membrane deoxygenation device 1, a deoxygenated water tank 2, a pressurizing pump 3, a cold deoxygenated water header 4, a reaction device and heat exchanger 5, a hot deoxygenated water header 6, and a water tank 7 connected in sequence. The membrane deoxygenation device 1 is used to remove dissolved oxygen from demineralized water (including demineralized water produced by a water treatment device and condensate recovered by the reaction device and heat exchanger 5), and the generated deoxygenated water is temporarily stored in the deoxygenated water tank 2. The pressurizing pump 3 is used to pressurize the deoxygenated water from the deoxygenated water tank 2 to a suitable pressure, and then sends it to the reaction device and heat exchanger 5 through the cold deoxygenated water header 4. Here, the deoxygenated water participates in the reaction as a process medium or completes heat exchange as an endothermic medium. The deoxygenated water that has completed heat exchange is collected in the water tank 7 through the hot deoxygenated water header 6. The organic matter is biomass, coal, etc.

[0018] The aforementioned pressurizing pump 3 includes a high-pressure pump 301, a medium-pressure pump 302, and a low-pressure pump 303; the cold deoxygenated water header 4 includes a high-pressure cold demineralized water header 401, a medium-pressure cold demineralized water header 402, and a low-pressure cold demineralized water header 403; the hot deoxygenated water header 6 includes a high-pressure hot demineralized water header 601, a medium-pressure hot demineralized water header 602, and a low-pressure hot demineralized water header 603; the water tank 7 includes a high-pressure water tank 701, a medium-pressure water tank 702, and a low-pressure water tank 703; the outlet of the deoxygenated water tank 2 is connected to the inlet of the high-pressure pump 301, the medium-pressure pump 302, and the low-pressure pump 303, respectively. The inlet of each reaction device and heat exchanger 5 is connected to the outlet of the high-pressure pump 301, medium-pressure pump 302, and low-pressure pump 303 in sequence through the high-pressure cold demineralized water header 401, medium-pressure cold demineralized water header 402, and low-pressure cold demineralized water header 403, respectively. The outlet of each reaction device and heat exchanger 5 is connected to the inlet of the high-pressure water tank 701, medium-pressure water tank 702, and low-pressure water tank 703 in sequence through the high-pressure hot demineralized water header 601, medium-pressure hot demineralized water header 602, and low-pressure hot demineralized water header 603, respectively. The number of reaction devices and heat exchangers 5 is 4.

[0019] The above-mentioned membrane deoxygenation device 1 is a hollow fiber membrane contact deoxygenator, and the deoxygenation process does not consume steam.

[0020] The aforementioned reaction apparatus and heat exchanger 5 can be a gasifier, a waste heat boiler, a conversion device, or a high-quality raw material synthesis device.

[0021] The aforementioned water tank 7 is equipped with a heating steam inlet for heating the hot deoxygenated water to the temperature required by the process.

[0022] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An energy-saving system for the process of synthesizing high-quality raw materials through the gasification of organic matter, characterized in that: It includes a membrane deoxygenation device (1), a deoxygenated water tank (2), a pressurizing pump (3), a cold deoxygenated water header (4), a reaction device and heat exchanger (5), a hot deoxygenated water header (6), and a water tank (7) connected in sequence.

2. The energy-saving system for the process of synthesizing high-quality raw materials through organic matter gasification according to claim 1, characterized in that: The membrane deoxygenation device (1) is a hollow fiber membrane contact deoxygenator.

3. The energy-saving system for the process of synthesizing high-quality raw materials through organic matter gasification according to claim 1, characterized in that: The reaction device and heat exchanger (5) are gasifiers, waste heat boilers, conversion devices or high-quality raw material synthesis devices.

4. The energy-saving system for the process of synthesizing high-quality raw materials by organic matter gasification according to claim 1, characterized in that: The water tank (7) is provided with a heating steam inlet.

5. An energy-saving system for the process of synthesizing high-quality raw materials through organic matter gasification according to claim 1, characterized in that: The pressurization pump (3), the cold deoxygenated water main pipe (4), the reaction device and heat exchanger (5), the hot deoxygenated water main pipe (6) and the water tank (7) are all equipped with multiple units or multiple pipes according to the process pressure requirements.

6. An energy-saving system for the process of synthesizing high-quality raw materials through organic matter gasification according to claim 5, characterized in that: The pressurizing pump (3) includes a high-pressure pump (301), a medium-pressure pump (302), and a low-pressure pump (303). The cold deoxygenated water header (4) includes a high-pressure cold demineralized water header (401), a medium-pressure cold demineralized water header (402), and a low-pressure cold demineralized water header (403). The hot deoxygenated water header (6) includes a high-pressure hot demineralized water header (601), a medium-pressure hot demineralized water header (602), and a low-pressure hot demineralized water header (603). The water tank (7) includes a high-pressure water tank (701), a medium-pressure water tank (702), and a low-pressure water tank (703). The outlet of the deoxygenated water tank (2) is connected to the inlet of the high-pressure pump (301), the medium-pressure pump (302) and the low-pressure pump (303), respectively. The inlet of each reaction device and heat exchanger (5) is connected to the outlet of the high-pressure pump (301), the medium-pressure pump (302) and the low-pressure pump (303) in sequence through the high-pressure cold demineralized water header (401), the medium-pressure cold demineralized water header (402) and the low-pressure cold demineralized water header (403), respectively. The outlet of each reaction device and heat exchanger (5) is connected to the inlet of the high-pressure water tank (701), the medium-pressure water tank (702) and the low-pressure water tank (703) in sequence through the high-pressure hot demineralized water header (601), the medium-pressure hot demineralized water header (602) and the low-pressure hot demineralized water header (603), respectively. The number of reaction devices and heat exchangers (5) is 4.

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