A nitrogen discharging process for a reaction kettle
By introducing a nitrogen recovery tank and a high-pressure nitrogen storage tank into the nitrogen emission process of the reactor, the problems of nitrogen waste and high equipment costs are solved, and efficient reuse of nitrogen and energy-saving and environmentally friendly operation of the equipment are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU DAMAONIU NEW MATERIAL TECH CO LTD
- Filing Date
- 2023-04-14
- Publication Date
- 2026-06-19
AI Technical Summary
Existing technologies for nitrogen emission from reactors suffer from nitrogen waste and high equipment costs. Furthermore, directly supplying nitrogen through nitrogen generators or storage tanks increases equipment pressure, requiring greater power or multiple units to operate simultaneously, thus increasing costs.
A nitrogen recovery tank is connected to the reaction vessel. Nitrogen is transported to multiple reaction vessels through the nitrogen recovery tank and purified and reused after the foaming process is completed. The direction of nitrogen flow is controlled by a high-pressure nitrogen storage tank and a solenoid valve, realizing a diverse and selective nitrogen delivery process.
It achieves efficient reuse of nitrogen, reduces equipment operating costs, lowers the risk of equipment damage, reduces noise pollution, adapts to different foaming needs, and improves equipment utilization.
Smart Images
Figure CN116476304B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of nitrogen foaming, and more particularly to a nitrogen emission process for a reaction vessel. Background Technology
[0002] When thermoplastic elastomers are foamed, the elastomer to be foamed needs to be placed in a foaming kettle, the kettle is closed, and high-pressure nitrogen gas is introduced into the kettle. The high-pressure nitrogen gas is maintained in the foaming kettle for a period of time, allowing the internal thermoplastic elastomer to foam rapidly; this foaming process is a purely physical reaction. After the foaming reaction is complete, the nitrogen gas needs to be discharged, and the foamed thermoplastic elastomer needs to be removed. However, existing technology directly discharges the nitrogen gas after the reaction, requiring the injection of new nitrogen gas for the next use, resulting in nitrogen waste and high equipment costs. To alleviate this problem, existing technology uses a nitrogen recovery tank to recover nitrogen, achieving energy-saving and environmentally friendly reuse. However, directly supplying nitrogen gas into the foaming kettle through nitrogen generators or nitrogen storage tanks causes the nitrogen generators or storage tanks to increase their operating pressure in a short period, requiring higher power or multiple nitrogen generators to operate simultaneously, thus increasing costs. In addition, existing patented technologies (such as CN113041784A) only improve the nitrogen generation system itself, effectively solving the above problems in nitrogen delivery and emission processes. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a nitrogen emission process for a reaction vessel.
[0004] To achieve the above objectives, the present invention adopts the following technical solution, comprising the following steps:
[0005] The nitrogen produced by the nitrogen generator is pressurized by the first nitrogen compressor and transported to at least one set of first foaming kettles;
[0006] After the foaming process is carried out in the first foaming kettle, nitrogen is transported to the nitrogen recovery tank. The nitrogen recovery tank is connected to the second foaming kettle through an internal bidirectional fluid transport pipeline, and the nitrogen in the nitrogen recovery tank is transported to the second foaming kettle.
[0007] After the foaming process is carried out in the second foaming kettle, nitrogen is introduced into the nitrogen recovery tank through the conveying pipeline or into the waste gas treatment equipment through a branch pipeline connected to the conveying pipeline for purification before being discharged.
[0008] As a further description of the above technical solution, the following steps are also included:
[0009] The nitrogen generated by the nitrogen generator is simultaneously introduced into the first foaming kettle and the second foaming kettle;
[0010] After the first foaming kettle and the second foaming kettle complete the foaming process, the first foaming kettle delivers nitrogen to the nitrogen recovery tank, and the second foaming kettle delivers nitrogen to the nitrogen recovery tank through the delivery pipeline;
[0011] When the nitrogen in the nitrogen recovery tank is reused, the nitrogen recovery tank transports the nitrogen to the second foaming kettle through the conveying pipeline, and the nitrogen is transported to the first foaming kettle through the second pipeline.
[0012] As a further description of the above technical solution, the conveying pipeline connected to the nitrogen recovery tank is connected to the second nitrogen compressor. After the nitrogen is pressurized by the second nitrogen compressor, it is conveyed to the first foaming kettle and the second foaming kettle to meet the nitrogen pressure standard of the foaming process.
[0013] As a further description of the above technical solution, the waste gas treatment equipment includes an absorption tower and an SCR treatment device, used to treat impurities and harmful substances in nitrogen.
[0014] The exhaust gas treatment equipment also includes a silencer, which is used to eliminate the noise from nitrogen emissions.
[0015] As a further description of the above technical solution, one end of the conveying pipeline is connected to the outlet of the nitrogen recovery tank, and the other end is connected to the second foaming kettle. A two-way valve is provided on the conveying pipeline. The two-way valve is used to control the conveying of nitrogen to the second foaming kettle or the conveying of nitrogen from the second foaming kettle to the nitrogen recovery tank.
[0016] As a further description of the above technical solution, the inlet of the second pipe is connected to the conveying pipe, the outlet of the second pipe is connected to the inlet pipe of the first foaming kettle, and a solenoid valve is provided on the second pipe for controlling the opening and closing of the second pipe.
[0017] As a further description of the above technical solution, a high-pressure nitrogen storage tank is externally connected to the first pipeline connecting the first nitrogen compressor and the first foaming kettle. The high-pressure nitrogen storage tank is connected to the first pipeline through a three-way pipe, and a solenoid valve is provided at the connection points of the three-way pipe, the high-pressure nitrogen storage tank, and the first pipeline.
[0018] As a further description of the above technical solution, the solenoid valve includes a first solenoid valve, a second solenoid valve, and a third solenoid valve.
[0019] The first solenoid valve is closed, and the second and third solenoid valves are open. In this working state, the nitrogen generator supplies nitrogen.
[0020] When the first and second solenoid valves are open and the third solenoid valve is closed, the high-pressure nitrogen storage tank supplies nitrogen in this operating state.
[0021] As a further description of the above technical solution, the first solenoid valve and the third solenoid valve are open, and the second solenoid valve is closed. In this working state, the nitrogen generator supplies nitrogen to the high-pressure nitrogen storage tank.
[0022] As a further description of the above technical solution, multiple nitrogen recovery tanks are provided, and the volume of each nitrogen recovery tank is 100 cubic meters.
[0023] The present invention has the following beneficial effects:
[0024] 1. This process can employ two nitrogen delivery methods. The appropriate process route and method can be selected based on specific needs. In non-emergency situations, the first method can be used, where nitrogen passes sequentially through the first and second foaming kettles. When it is necessary to complete the foaming process of multiple kettles within a short time, the second method can be used, where nitrogen is supplied to multiple kettles simultaneously, i.e., nitrogen is supplied to both the first and second foaming kettles at the same time. These methods allow for versatility and selectivity in this process, enabling the choice of method to meet actual requirements. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the process flow proposed in this invention.
[0026] Legend:
[0027] 1. Nitrogen generator; 2. First nitrogen compressor; 3. First foaming kettle; 4. Nitrogen recovery tank; 5. Conveying pipeline; 6. Second foaming kettle; 7. Branch pipeline; 8. Waste gas treatment equipment; 801. Absorption tower; 802. SCR treatment equipment; 9. Directional valve; 10. High-pressure nitrogen storage tank; 11. First pipeline; 12. First solenoid valve; 13. Second solenoid valve; 14. Third solenoid valve. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] Reference Figure 1 The present invention provides an embodiment of a nitrogen emission process for a reaction vessel, comprising the following steps:
[0030] The nitrogen produced by the nitrogen generator 1 is pressurized by the first nitrogen compressor 2 and transported to at least one set of first foaming kettles 3. In this embodiment, one set of first foaming kettles 3 is provided. In other embodiments, multiple sets of first foaming kettles 3 may be provided.
[0031] After the foaming process is completed in the first foaming kettle 3 (not the focus of this application, and will not be elaborated here), nitrogen is transported to the nitrogen recovery tank 4. The nitrogen recovery tank 4 is connected to the second foaming kettle 6 through the internal fluid, i.e., the nitrogen bidirectional fluid transport pipeline 5 in this application, so that the nitrogen in the nitrogen recovery tank 4 is transported to the second foaming kettle 6. Of course, in this embodiment, there can be multiple sets of second foaming kettles 6, which can be set according to actual needs. Through the above technical solution, nitrogen can enter the first foaming kettle 3 and the second foaming kettle 6 in sequence to ferment the internal thermoplastic elastomer. The nitrogen recovery tank 4 can buffer the transition of nitrogen. Compared with the prior art of directly connecting the nitrogen generation equipment to the first foaming kettle 3 and the second foaming kettle 6 and supplying nitrogen to the first foaming kettle 3 and the second foaming kettle 6 at the same time, this application can alleviate the operating pressure of the nitrogen generation equipment and nitrogen pressure equipment to a certain extent, reduce the time of long-term high-power operation or even rated power operation of the nitrogen generation and supply equipment, thereby reducing the investment in operating costs and the risk of equipment damage.
[0032] In this embodiment, the process also includes the following steps, representing another mode of operation: nitrogen generated by nitrogen generator 1 is simultaneously introduced into both the first foaming vessel 3 and the second foaming vessel 6. After the foaming process is completed in both vessels, the first foaming vessel 3 transfers the nitrogen to a nitrogen recovery tank 4, and the second foaming vessel 6 transfers the nitrogen to the nitrogen recovery tank 4 via a conveying pipe 5. When the nitrogen in the nitrogen recovery tank 4 is to be reused, it is transferred back to the second foaming vessel 6 via the conveying pipe 5. Nitrogen gas is transported to the first foaming kettle 3 through the second pipeline. Through the above process, high-pressure nitrogen gas can be introduced into the first foaming kettle 3 and the second foaming kettle 6 at the same time. This is suitable for situations where multiple foaming kettles need to be foamed at the same time in a short period of time. Multiple nitrogen recovery tanks 4 can also be set up. The volume of a single nitrogen recovery tank 4 can reach 100 cubic meters. It can recover and reuse the nitrogen gas after the foaming process is completed. Compared with the existing method of directly emitting the used nitrogen gas to the outside, it achieves the effect of energy saving and environmental protection, and greatly saves costs.
[0033] Through the above technical solution, this process can employ two nitrogen delivery methods. The appropriate process route and method can be selected according to specific needs. In non-emergency situations, the first process method can be used, where nitrogen sequentially passes through the first foaming vessel 3 and the second foaming vessel 6. When it is necessary to complete the foaming process of multiple foaming vessels in a short time, the second method can be used, which involves simultaneously supplying nitrogen to multiple foaming vessels. In this embodiment, nitrogen is simultaneously supplied to the first foaming vessel 3 and the second foaming vessel 6. This solution achieves versatility and selectivity in the process, allowing for selection based on actual conditions to meet specific needs.
[0034] Furthermore, the conveying pipe 5 connected to the nitrogen recovery tank 4 is connected to the second nitrogen compressor (not shown in the figure). After the nitrogen is pressurized by the second nitrogen compressor, it is conveyed to the first foaming kettle 3 and the second foaming kettle 6 to meet the nitrogen pressure standard of the foaming process.
[0035] After the foaming process in the second foaming kettle 6, nitrogen is introduced into the nitrogen recovery tank 4 through the conveying pipe 5 or into the waste gas treatment equipment 8 through the branch pipe 7 connected to the conveying pipe 5 for purification before being discharged. The waste gas treatment equipment 8 includes an absorption tower 801 and an SCR treatment device. The absorption tower can absorb and convert harmful gases in the waste gas, while the SCR treatment device can remove some nitrogen oxides in the nitrogen to ensure that the waste gas discharge reduces the impact on the external environment.
[0036] The exhaust gas treatment equipment 8 also includes a silencer, which can be used to eliminate the howling noise when nitrogen is emitted.
[0037] One end of the conveying pipeline 5 is connected to the outlet of the nitrogen recovery tank 4, and the other end is connected to the second foaming kettle 6. A two-way valve 9 is installed on the conveying pipeline 5. The two-way valve 9 is used to control the conveying of nitrogen to the second foaming kettle 6 or the conveying of nitrogen from the second foaming kettle 6 to the nitrogen recovery tank 4, thereby realizing the nitrogen input and output in two process routes using a single pipeline, reducing the need for openings in the second foaming kettle 6 and adding new pipelines, thus reducing cost investment.
[0038] The inlet of the second pipe is connected to the conveying pipe 5, and the outlet of the second pipe is connected to the inlet pipe of the first foaming kettle 3. A solenoid valve is installed on the second pipe to control the opening and closing of the second pipe.
[0039] A high-pressure nitrogen storage tank 10 is connected to the outside of the first pipeline 11 connecting the first nitrogen compressor 2 and the first foaming kettle 3. The high-pressure nitrogen storage tank 10 is connected to the first pipeline 11 through a three-way pipe. Solenoid valves are installed at the connection points of the three-way pipe, the high-pressure nitrogen storage tank 10, and the first pipeline 11. The solenoid valves include a first solenoid valve 12, a second solenoid valve 13, and a third solenoid valve 14.
[0040] The first solenoid valve 12 is closed, and the second solenoid valve 13 and the third solenoid valve 14 are open. In this working state, nitrogen is supplied directly through the nitrogen generator 1 and the first nitrogen compressor 2.
[0041] When the first solenoid valve 12 and the second solenoid valve 13 are open, and the third solenoid valve 14 is closed, the high-pressure nitrogen storage tank 10 supplies nitrogen under this working state.
[0042] The first solenoid valve 12 and the third solenoid valve 14 are open, and the second solenoid valve 13 is closed. In this working state, the nitrogen generator 1 supplies nitrogen to the high-pressure nitrogen storage tank for nitrogen storage, so that nitrogen can be supplied through the high-pressure nitrogen storage tank 10 during subsequent use.
[0043] By setting up an additional high-pressure nitrogen storage tank, it can serve as a backup nitrogen supply device. The high-pressure nitrogen storage tank 10 can be selected according to actual needs, or the nitrogen can be supplied directly through the nitrogen generator 1 and the first nitrogen compressor 2.
[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A nitrogen emission process for a reaction vessel, characterized in that: Includes the following steps: In non-emergency situations, the nitrogen produced by the nitrogen generator (1) is pressurized by the first nitrogen compressor (2) and delivered to at least one set of first foaming kettles (3); After the foaming process is carried out in the first foaming kettle (3), nitrogen is transported to the nitrogen recovery tank (4). The nitrogen recovery tank (4) is connected to the second foaming kettle (6) through the internal fluid bidirectional flow pipeline (5), and the nitrogen in the nitrogen recovery tank (4) is transported to the second foaming kettle (6). After the foaming process is carried out in the second foaming kettle (6), nitrogen is introduced into the nitrogen recovery tank (4) through the conveying pipe (5) or into the waste gas treatment equipment (8) through the branch pipe (7) connected to the conveying pipe (5) for purification before being discharged; When it is necessary to complete the foaming process of multiple foaming kettles in a short period of time, the nitrogen generated by the nitrogen generator (1) is simultaneously introduced into the first foaming kettle (3) and the second foaming kettle (6); After the first foaming kettle (3) and the second foaming kettle (6) complete the foaming process, the first foaming kettle (3) transports nitrogen to the nitrogen recovery tank (4), and the second foaming kettle (6) transports nitrogen to the nitrogen recovery tank (4) through the conveying pipe (5); When the nitrogen in the nitrogen recovery tank (4) is reused, the nitrogen recovery tank (4) will transport the nitrogen to the second foaming kettle (6) through the conveying pipe (5), and transport the nitrogen to the first foaming kettle (3) through the second pipe.
2. A nitrogen venting process for a reactor vessel as defined in claim 1, characterized in that: The nitrogen recovery tank (4) is connected to the conveying pipe (5) which is connected to the second nitrogen compressor. After the nitrogen is pressurized by the second nitrogen compressor, it is conveyed to the first foaming kettle (3) and the second foaming kettle (6) to meet the nitrogen pressure standard of the foaming process.
3. The nitrogen emission process for a reactor according to claim 1, characterized in that: The waste gas treatment equipment (8) includes an absorption tower (801) and an SCR treatment device (802) for treating impurities and harmful substances in nitrogen. The exhaust gas treatment equipment (8) also includes a silencer for eliminating the noise of nitrogen emissions.
4. The nitrogen venting process for a reactor vessel of claim 1, wherein: One end of the conveying pipe (5) is connected to the outlet of the nitrogen recovery tank (4), and the other end is connected to the second foaming kettle (6). A two-way valve (9) is provided on the conveying pipe (5). The two-way valve (9) is used to control the nitrogen to be conveyed to the second foaming kettle (6) or the nitrogen from the second foaming kettle (6) to the nitrogen recovery tank (4).
5. The nitrogen venting process for a reactor vessel of claim 1, wherein: The inlet of the second pipe is connected to the conveying pipe (5), and the outlet of the second pipe is connected to the inlet pipe of the first foaming kettle (3). A solenoid valve is provided on the second pipe, and the solenoid valve is used to control the opening and closing of the second pipe.
6. The nitrogen venting process for a reactor vessel of claim 1, wherein: The first pipeline (11) connecting the first nitrogen compressor (2) and the first foaming kettle (3) is externally connected to a high-pressure nitrogen storage tank (10). The high-pressure nitrogen storage tank (10) is connected to the first pipeline (11) through a three-way pipe, and a solenoid valve is provided at the connection between the three-way pipe, the high-pressure nitrogen storage tank (10), and the first pipeline (11).
7. The nitrogen emission process for a reactor according to claim 6, characterized in that: The solenoid valve includes a first solenoid valve (12), a second solenoid valve (13), and a third solenoid valve (14). The first solenoid valve (12) is closed, and the second solenoid valve (13) and the third solenoid valve (14) are open. In this working state, the nitrogen generator (1) supplies nitrogen. When the first solenoid valve (12) and the second solenoid valve (13) are open, and the third solenoid valve (14) is closed, the high-pressure nitrogen storage tank (10) supplies nitrogen.
8. The nitrogen emission process for a reactor according to claim 7, characterized in that: The first solenoid valve (12) and the third solenoid valve (14) are open, and the second solenoid valve (13) is closed. In this working state, the nitrogen generator (1) supplies nitrogen to the high-pressure nitrogen storage tank (10).
9. The nitrogen emission process for a reactor according to claim 1, characterized in that: Multiple nitrogen recovery tanks (4) are provided, and the volume of each nitrogen recovery tank (4) is 100 cubic meters.