Energy-saving CO conversion condensate steam stripping device

Abstract

The embodiment of the utility model provides an energy-saving CO conversion condensate steam stripping device which comprises a steam stripping tower, a liquid phase input end, a liquid phase output end, a gas phase input end and a gas phase output end are arranged on the steam stripping tower, the liquid phase input end of the steam stripping tower is connected with a liquid phase input pipeline, the liquid phase output end of the steam stripping tower is connected with a liquid phase output pipeline, and the gas phase output end of the steam stripping tower is connected with a gas phase output pipeline. The stripping tower is connected with an energy recovery device, the energy recovery device comprises a hydraulic conversion kinetic energy mechanism and a booster pump, a clutch is arranged between the hydraulic conversion kinetic energy mechanism and the booster pump, the hydraulic conversion kinetic energy mechanism drives the booster pump through the clutch, and the hydraulic conversion kinetic energy mechanism is connected to a liquid phase input pipeline in series. And the booster pump is connected in series with the liquid phase output pipeline. According to the utility model, the defect that the residual pressure of the converted condensate is not effectively utilized in the prior art is overcome, the residual pressure of the condensate is fully utilized through the energy recovery device, and the energy is recycled.

Description

Technical Field

[0001] The utility model belongs to the technical field of CO conversion condensate stripping, in particular to an energy-saving CO conversion condensate stripping device. Background Art

[0002] In the CO conversion process, the condensate is the product of the high-temperature conversion gas of the CO conversion device after being cooled and condensed step by step. It contains a small amount of harmful impurities such as carbon dioxide, hydrogen sulfide, ammonia, etc. that are easy to corrode, and a small amount of solids that are easy to scale. At present, the high-pressure conversion condensate of the conversion unit is depressurized by a pressure reducing valve and sent to the stripping system for impurity removal. After obtaining the purified low-pressure condensate, the condensate is pressurized by a pump and sent to the subsequent device for use. The problem with the current condensate stripping device is that the large amount of high-pressure energy carried by the high-pressure conversion condensate cannot be effectively recovered, resulting in a waste of pressure energy. Utility Model Content

[0003] In view of the above problems existing in the prior art, an object of the embodiments of the present utility model is to provide an energy-saving CO shift condensate stripping device.

[0004] The technical solution adopted in the embodiment of the utility model is an energy-saving CO2 conversion condensate stripping device, including a stripping tower, wherein the stripping tower is provided with a liquid phase input end, a liquid phase output end, a gas phase input end and a gas phase output end, the liquid phase input end of the stripping tower is connected to a liquid phase input pipeline, the liquid phase output end of the stripping tower is connected to a liquid phase output pipeline, the stripping tower is connected to an energy recovery device, the energy recovery device includes a hydraulic conversion kinetic energy mechanism and a booster pump, a clutch is arranged between the hydraulic conversion kinetic energy mechanism and the booster pump, the hydraulic conversion kinetic energy mechanism drives the booster pump through the clutch, the hydraulic conversion kinetic energy mechanism is connected in series to the liquid phase input pipeline, and the booster pump is connected in series to the liquid phase output pipeline.

[0005] Furthermore, the energy recovery device also includes a motor, and a power output end of the motor is connected to a boost pump.

[0006] Furthermore, the liquid phase input pipeline is connected to a condensate buffer tank, and a precision filter is also connected in series to the liquid phase input pipeline.

[0007] Furthermore, a first wire mesh demister is installed in the stripping tower.

[0008] Furthermore, the gas phase output end of the stripping tower is connected to a gas phase output pipeline, the gas phase output pipeline is connected to a stripping separator, and the gas phase input end of the stripping tower is connected to a low-pressure steam pipeline.

[0009] Furthermore, a stripping water cooler is connected in series to the gas phase output pipeline.

[0010] Furthermore, a second wire mesh demister is installed in the stripping separator, the top end of the stripping water cooler is connected to the acid gas pipeline, and the bottom end of the stripping water cooler is connected to the stripping wastewater pipeline.

[0011] Furthermore, a liquid distributor is installed at the liquid phase input end of the stripping tower, and the liquid phase input end of the stripping tower is connected to a liquid phase input pipeline through the liquid distributor.

[0012] Compared with the prior art, the energy-saving CO2 conversion condensate stripping device proposed by the utility model overcomes the defect of the prior art that the conversion condensate residual pressure is not effectively utilized, and fully utilizes the condensate residual pressure through the energy recovery device to achieve energy recovery.

[0013] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0014] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0020] See also Figure 1 The embodiment of the utility model provides an energy-saving CO2-converted condensate stripping device, comprising a stripping tower 1, wherein the stripping tower 1 is provided with a liquid phase input end, a liquid phase output end, a gas phase input end and a gas phase output end, wherein the liquid phase input end of the stripping tower 1 is connected to a liquid phase input pipeline 2, wherein the liquid phase output end of the stripping tower 1 is connected to a liquid phase output pipeline 3, wherein the liquid phase output end of the stripping tower 1 is located below the liquid phase input end of the stripping tower 1, wherein the stripping tower 1 is connected to an energy recovery device, wherein the energy recovery device comprises a hydraulic conversion kinetic energy mechanism 4 and a booster pump 5, wherein a clutch 6 is arranged between the hydraulic conversion kinetic energy mechanism 4 and the booster pump 5, wherein the hydraulic conversion kinetic energy mechanism 4 drives the booster pump 5 through the clutch 6, wherein the hydraulic conversion kinetic energy mechanism 4 is connected in series to the liquid phase input pipeline 2, wherein the booster pump 5 is connected in series to the liquid phase output pipeline 3. The technical solution overcomes the defect that the residual pressure of the converted condensate in the prior art is not effectively utilized, and fully utilizes the residual pressure of the condensate through the energy recovery device to realize energy recovery. The hydraulic kinetic energy conversion mechanism 4 utilizes the pressure energy in the liquid phase input pipeline 2 to convert the hydraulic pressure of the high-pressure conversion condensate fed into the stripping tower 1 into mechanical energy, and drives the booster pump 5 to discharge the stripping tower 1 .

[0021] The energy recovery device further comprises a motor 7, the power output end of which is connected to the booster pump 5. When the kinetic energy converted by the hydraulic kinetic energy conversion mechanism 4 cannot meet the demand of the booster pump 5, the motor 7 is used to drive the booster pump 5 and supplement the power.

[0022] The liquid phase input pipeline 2 is connected to a condensate buffer tank 8, and a precision filter 9 is also connected in series to the liquid phase input pipeline 2. The precision filter 9 is used to filter the condensate input to the stripping tower 1.

[0023] A first wire mesh demister 10 is installed in the stripping tower 1, and the first wire mesh demister 10 divides the inner cavity of the stripping tower 1 horizontally. The liquid phase input and output ends and the gas phase input end of the stripping tower 1 are all located below the first wire mesh demister 10, and the gas phase output end of the stripping tower 1 is located above the first wire mesh demister 10.

[0024] The gas phase output end of the stripping tower 1 is connected to a gas phase output pipeline 12, the gas phase output pipeline 12 is connected to a stripping separator 13, the gas phase input end of the stripping tower 1 is connected to a low-pressure steam pipeline 14, the gas phase output end of the stripping tower 1 is located above the liquid phase input end of the stripping tower 1, and the gas phase input end of the stripping tower 1 is located below the liquid phase input end of the stripping tower 1. The stripping separator 13 separates acidic gas and stripping wastewater.

[0025] The gas phase output pipeline 12 is connected in series with a stripping water cooler 15. The stripping water cooler 15 is used to cool and condense the gas in the gas phase output pipeline 12.

[0026] The stripping separator 13 is provided with a second wire mesh demister 16, which divides the inner cavity of the stripping separator 13 horizontally, and is located above the connection between the gas phase output pipeline 12 and the stripping separator 13. The top end of the stripping water cooler 15 is connected to the acid gas pipeline 17, and the bottom end of the stripping water cooler 15 is connected to the stripping wastewater pipeline 18. The acid gas and stripping wastewater separated by the stripping separator 13 are discharged from the acid gas pipeline 17 and the stripping wastewater pipeline 18 respectively.

[0027] The liquid phase input end of the stripping tower 1 is equipped with a liquid distributor 19, and the liquid phase input end of the stripping tower 1 is connected to the liquid phase input pipeline 2 through the liquid distributor 19. The liquid distributor 19 is used to distribute the incoming liquid, which helps to improve the stripping efficiency.

[0028] Implementation process of the device: High-pressure conversion condensate, with a pressure of 3.3MPaG and a temperature of 95°C, contains H2O, trace CO2, H2S, NH3, solids, etc. It is collected in the condensate buffer tank 8 and input into the stripping tower 1 through the liquid phase input pipeline 2. The high-pressure conversion condensate passes through the hydraulic conversion kinetic energy mechanism 4 on the liquid phase input pipeline 2. The pressure of the high-pressure conversion condensate is reduced to 0.5MPaG. Then the high-pressure conversion condensate enters the stripping tower 1 and adopts countercurrent operation to differentially contact with saturated steam with a pressure of 0.5MPaG and a temperature of 159°C. Improve the stripping efficiency; the process condensate discharged from the stripping tower 1 after stripping has a pressure of 0.32MPaG, a temperature of 134°C, an alkalinity of ≤10mmol / L, and NH3≤200mg / L. The process condensate is discharged from the stripping tower 1 through the booster pump 5; the stripping gas pressure at the top of the stripping tower 1 is 0.3MPaG, and the stripping gas with a temperature of 134°C is cooled to 80°C by the stripping water cooler 15. The stripping water cooler 15 can adopt a shell and tube heat exchanger, and adopts countercurrent operation to exchange heat with circulating water and then realizes gas-liquid separation through the stripping separator 13.

[0029] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. An energy-saving CO2-converting condensate stripping device, comprising a stripping tower (1), wherein the stripping tower (1) is provided with a liquid phase input end, a liquid phase output end, a gas phase input end and a gas phase output end, the liquid phase input end of the stripping tower (1) is connected to a liquid phase input pipeline (2), and the liquid phase output end of the stripping tower (1) is connected to a liquid phase output pipeline (3), characterized in that: The stripping tower (1) is connected to an energy recovery device, which includes a hydraulic kinetic energy conversion mechanism (4) and a booster pump (5). A clutch (6) is provided between the hydraulic kinetic energy conversion mechanism (4) and the booster pump (5). The hydraulic kinetic energy conversion mechanism (4) drives the booster pump (5) via the clutch (6). The hydraulic kinetic energy conversion mechanism (4) is connected in series to a liquid phase input pipeline (2), and the booster pump (5) is connected in series to a liquid phase output pipeline (3).

2. An energy-saving CO shift condensate stripping device according to claim 1, characterized in that: The energy recovery device further comprises a motor (7), the power output end of the motor (7) being connected to the boost pump (5).

3. The energy-saving CO shift condensate stripping device according to claim 1, characterized in that: The liquid phase input pipeline (2) is connected to a condensate buffer tank (8), and a precision filter (9) is also connected in series to the liquid phase input pipeline (2).

4. The energy-saving CO2-shift condensate stripping device according to claim 1, characterized in that: A first wire mesh demister (10) is installed in the stripping tower (1).

5. The energy-saving CO shift condensate stripping device according to claim 1, characterized in that: The gas phase output end of the stripping tower (1) is connected to a gas phase output pipeline (12), the gas phase output pipeline (12) is connected to a stripping separator (13), and the gas phase input end of the stripping tower (1) is connected to a low-pressure steam pipeline (14).

6. The energy-saving CO shift condensate stripping device according to claim 5, characterized in that: The gas phase output pipeline (12) is connected in series with a stripping water cooler (15).

7. The energy-saving CO shift condensate stripping device according to claim 6, characterized in that: The stripping separator (13) is provided with a second wire mesh demister (16), the top end of the stripping water cooler (15) is connected to the acid gas pipeline (17), and the bottom end of the stripping water cooler (15) is connected to the stripping wastewater pipeline (18).

8. The energy-saving CO shift condensate stripping device according to claim 1, characterized in that: A liquid distributor (19) is installed at the liquid phase input end of the stripping tower (1), and the liquid phase input end of the stripping tower (1) is connected to the liquid phase input pipeline (2) via the liquid distributor (19).

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