Combined tail gas one-way water seal tank
By designing a combined exhaust gas unidirectional water sealing tank, the energy waste problem in the treatment method of high-calorie gas in the vapor deposition method is solved, and efficient recycling of process exhaust and efficient utilization of energy is achieved.
Patent Information
- Application Number
- CN202421820702.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing high-calorie gas treatment methods have the problem of energy waste, especially when preparing carbon nanotubes by vapor deposition, the direct emission or ineffective combustion of residual reactants leads to energy waste.
A combined exhaust gas unidirectional water sealing tank is designed, and the process exhaust gas and gas are processed separately through the water sealing device. The process exhaust gas enters the gas pipeline network after decompression, and the gas passes through the water sealing room to prevent series leakage.
It realizes efficient recycling of process exhaust gas and efficient utilization of energy, avoids direct emissions and ineffective combustion of high-calorie gases, and reduces energy waste.
Smart Images
Figure CN222992247U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a water seal tank, specifically to a combined tail gas unidirectional water seal tank. Background Art
[0002] At present, energy-saving and new energy vehicles are being vigorously developed at home and abroad. The demand for lithium-ion batteries will increase rapidly. Accordingly, the market of positive and negative conductive agents is also growing rapidly, and the trend is still rising. Carbon nanotubes have broad application prospects in the fields of supercapacitors, conductive plastics (polyester), lithium-ion batteries, etc. Ordinary carbon nanotubes account for 5% of the lithium battery cathode material, and 25,000 tons of ordinary carbon nanotubes powder are needed every year. There is an urgent need to develop a carbon nanotube synthesis technology with practicality, low cost and controllable characteristics. Preparing carbon nanotubes by chemical vapor deposition has gradually become the mainstream industrial process due to its unique advantages. Its residual reactants are high-calorie gases, and there is a great waste of energy in direct emission or ineffective combustion.
[0003] Therefore, the known treatment methods of high-calorie gases have the above-mentioned inconveniences and problems. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a safe and reliable combined tail gas unidirectional water seal tank.
[0005] To achieve the above purpose, the technical solution of the utility model is:
[0006] A combined tail gas unidirectional water seal tank, including a water seal device, wherein,
[0007] The water seal device is a sealed water tank, which is successively divided into a tail gas liquid seal chamber, a gas phase exchange space and a gas water seal chamber by a vertical first partition and a third partition. A second partition is arranged in the gas phase exchange space as an internal weir plate; a process tail gas inlet valve and a ventilation valve are arranged at the top of the tail gas liquid seal chamber, a ventilation valve and a gas discharge valve are arranged at the top of the gas phase exchange space to discharge gas into the gas pipeline network, and a drain valve is arranged on the side of the bottom of the water tank in the tail gas liquid seal chamber; a relief valve is arranged at the top of the water tank in the gas water seal chamber, a make-up water valve is arranged at the top of the side of the gas water seal chamber, and a leakage prevention device is arranged below the make-up water valve, flowing out in an overflow form, and a drain valve is arranged at the bottom of the side of the gas water seal chamber.
[0008] The combined tail gas unidirectional water seal tank of the utility model can also be further realized by adopting the following technical measures.
[0009] In the above-mentioned combined tail gas unidirectional water seal tank, the pressure of the process tail gas is 40 kPa to 60 kPa.
[0010] The aforementioned combined tail gas unidirectional water seal tank, wherein the top ends of the first partition plate and the third partition plate are fixedly welded to the water tank top plate, and the bottom ends are at a certain distance from the water tank bottom plate.
[0011] The aforementioned combined tail gas unidirectional water seal tank, wherein the second partition plate is a weir plate, and the weir plate is arranged in the middle of the gas phase exchange space, and the gas phase exchange space is evenly divided into two parts.
[0012] The aforementioned combined tail gas unidirectional water seal tank, wherein the water seal tank is a cylindrical tank or a cuboid tank.
[0013] After adopting the above technical solution, the combined tail gas unidirectional water seal tank of the present invention has the following advantages:
[0014] 1. It is applicable to the recovery of gas phase tail gas in the production process of carbon nanotube preparation by chemical vapor deposition method;
[0015] 2. The tail gas is sent to the coke oven gas pipeline network, and the energy can be efficiently utilized. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the forward conduction of the combined tail gas unidirectional water seal tank according to the embodiment of the present invention;
[0017] Figure 2 It is a schematic diagram of the reverse cut-off of the combined tail gas unidirectional water seal tank according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION
[0018] The present invention will be further described in detail below with reference to the embodiments and their accompanying drawings.
[0019] Embodiment 1
[0020] Now please refer to Figure 1 and Figure 2 , the combined tail gas unidirectional water seal tank of the present invention, which is composed of a water seal device 1, a tail gas liquid seal chamber 2, a gas phase exchange space 3, a gas water seal chamber 4, a first partition plate 5, a second partition plate 6, and a third partition plate 7.
[0021] The process of the combined tail gas unidirectional water seal tank of the present invention is as follows:
[0022] 1. The process tail gas enters the tail gas liquid seal chamber 2 from the external pipeline. Due to the tail gas pressure of about 40 kPa - 60 kPa, it can penetrate the tail gas liquid seal chamber 2 and enter the gas phase exchange space 3. Its residual pressure is about 10 kPa - 30 kPa, and it can enter the gas pipeline network with a pressure of about 8 kPa. At the same time, due to the function of the gas water seal chamber 4, it effectively prevents the gas and process tail gas from leaking into the atmosphere.
[0023] II. When the process tail gas stops being generated, the gas in the gas pipeline network enters the gas-phase exchange space 3. Since the gas pressure is about 8 kPa and it cannot break through the tail gas liquid seal chamber 2, it is thus prevented from entering the process tail gas pipeline network, achieving effective sealing and ensuring the safety of the upstream process equipment. At the same time, due to the function of the gas water seal chamber 4, gas leakage into the atmosphere is effectively prevented.
[0024] Please refer to Figure 1 , the operation method of the combined tail gas one-way water seal tank of the present utility model is as follows:
[0025] Figure 1 It is a schematic diagram of the forward conduction of the combined tail gas one-way water seal tank according to an embodiment of the present utility model. As shown in the figure, during forward conduction: when the process tail gas enters the tail gas liquid seal chamber 2, due to the tail gas pressure of about 40 kPa - 60 KPa, the liquid between the water seal device 1 and the partition 5 can be pressed to the space between the partition 5 and the partition 6, and the excess liquid flows by gravity to the space between the partition 6 and the partition 7, and finally is discharged outside the combined tail gas water seal tank through the gas water seal chamber 4. During this process, a constant effective liquid seal height is maintained between the partition 5 and the partition 6, so that the process tail gas is decompressed, that is, from 40 kPa - 60 kPa to 10 kPa - 30 kPa, and then the process tail gas enters the gas-phase exchange space 3, and at this time the pressure is still slightly greater than the gas pipeline network pressure, thus achieving the purpose of charging the process tail gas into the gas pipeline network. At the same time, since a constant liquid seal height is maintained in the gas water seal chamber 4, the process tail gas cannot continue to break through the gas water seal chamber 4 and will not be directly discharged into the atmospheric environment.
[0026] Figure 2 It is a schematic diagram of the reverse cut-off of the combined tail gas one-way water seal tank according to an embodiment of the present utility model. During reverse cut-off: when the process tail gas stops being generated, the gas in the pipeline network enters the gas-phase exchange space 3, and the gas pressure is relatively low, about 8 kPa, which only causes a part of the liquid between the partition 5 and the partition 6 to be pressed into the tail gas liquid seal chamber 2, and is not sufficient to break through the liquid seal height, thus preventing the gas from entering the process tail gas pipeline network and protecting the upstream process equipment. At the same time, since a constant liquid seal height is maintained in the gas water seal chamber 4, the gas in the gas-phase exchange space 3 cannot break through the gas water seal chamber 4 and cannot be discharged into the atmospheric environment either.
[0027] The effective water seal heights of the tail gas liquid seal chamber 2 and the gas water seal chamber 4 of the combined tail gas one-way water seal tank of the present utility model can be set to reasonable values according to the different pressures of the process tail gas and the gas pipeline network.
[0028] The utility model has substantial features and remarkable technical progress. The combined tail gas unidirectional water seal tank of the utility model is applicable to the recovery of gaseous tail gas in the production process of carbon nanotube preparation by chemical vapor deposition. The high calorific value tail gas continuously discharged during the production process is rich in methane and hydrogen, and is similar to the properties of coke oven gas in the existing pipe network of the plant. Based on the principle of efficient energy utilization, part of the tail gas is sent to the coke oven gas pipe network for use by existing heating furnaces and the like in the plant.
[0029] The combined tail gas unidirectional water seal tank of the utility model fills the process tail gas into the coal gas pipe network with relatively low pressure, and at the same time can prevent the reverse entry of coal gas into the upstream process equipment when the process tail gas stops being generated.
[0030] The above embodiments are only for illustrating the utility model, rather than limiting the utility model. Those skilled in the relevant technical field can also make various transformations or changes without departing from the spirit and scope of the utility model. Therefore, all equivalent technical solutions should also belong to the scope of the utility model and should be defined by each claim.
Claims
1. A combined tail gas one-way water seal tank, comprising a water seal device (1), characterized in that: The water seal device (1) is a sealed water tank, and the water tank is divided into a tail gas liquid seal chamber (2), a gas phase exchange space (3) and a gas water seal chamber (4) in sequence by a vertical first partition (5), a second partition (6) and a third partition (7); a process tail gas inlet valve and a vent valve are provided at the top of the tail gas liquid seal chamber (2), a vent valve and a gas discharge valve are provided at the top of the gas phase exchange space (3), so that the gas is discharged into the gas pipe network, and a drain valve is provided at the bottom side of the water tank of the tail gas liquid seal chamber (2); a vent valve is provided at the top of the water tank of the gas water seal chamber (4), a water supply valve is provided at the top of the side of the gas water seal chamber (4), a leakage prevention device is provided below the water supply valve, and the gas flows out in the form of overflow, and a drain valve is provided at the bottom of the side of the gas water seal chamber (4).
2. The combined tail gas one-way water seal tank according to claim 1, characterized in that: The pressure of the process tail gas is 40kPa-60kPa.
3. The combined tail gas one-way water seal tank according to claim 1, characterized in that: The top ends of the first partition plate (5) and the third partition plate (7) are respectively welded to the top plate of the water tank, and the bottom ends are a certain distance away from the bottom plate of the water tank.
4. The combined tail gas one-way water seal tank according to claim 1, characterized in that: The second partition plate (6) is a weir plate, which is arranged in the middle of the gas phase exchange space (3) to evenly divide the gas phase exchange space (3) into two parts.
5. The combined tail gas one-way water seal tank according to claim 1, characterized in that: The water seal groove is a cylindrical or rectangular groove.