Pipeline online cleaning system for BDO production
Through the online cleaning system, high-pressure cleaning liquid is used to clear the drain pipe, which solves the problem of pipeline blockage caused by catalyst powder in BDO production, simplifies the cleaning process, and ensures the continuity and efficiency of production.
Patent Information
- Application Number
- CN202420909928.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the BDO production process, the catalyst powder impurities in the reaction device will cause pipeline blockage, resulting in poor emissions, increased backpressure and unit damage. Traditional cleaning is cumbersome and time-consuming, affecting production continuity.
An online cleaning system including a gas-liquid separator, exhaust pipe, drain pipe, cleaning pipe, cleaning liquid tank, nitrogen pipe and pressure relief discharge pipe was designed. It was injected into the drain pipe into the drain pipe for unblocking, and filtering was used. The head and pressure gauge monitor and control the cleaning process to avoid disassembly operations.
It realizes rapid unblocking of pipeline blockage, simplifies the cleaning process, reduces the risk of downtime, and ensures the sustainability and efficiency of production.
Smart Images
Figure CN222241751U_ABST
Abstract
Description
Technical field:
[0001] The utility model belongs to the field of fine chemical raw material production, in particular to an online pipeline cleaning system for BDO production. Background technology:
[0002] 1,4-Butanediol (BDO) is an organic substance with a molecular formula of C4H10O2 and a molecular weight of 90.12. It is a colorless or light yellow oily liquid. It is flammable, with a freezing point of 20.1°C and a refractive index of 1.4461. It is soluble in methanol, ethanol, acetone, and slightly soluble in ether. It is hygroscopic, has a bitter smell, and tastes slightly sweet.
[0003] In the BDO production process, the reaction device contains metal catalysts. Solid granular impurities such as catalyst powder will be generated during the operation of the reactor. The impurities will follow the reaction gas phase into the downstream gas-liquid separator for gas-liquid separation. After gas-liquid separation, the catalyst powder impurities will follow the waste liquid and be discharged to the atmospheric pressure waste liquid tank. Since the gas-liquid separator discharge pipeline is a variable diameter pipeline, there is a change from high pressure to low pressure. The pressure change causes the material flow rate to decrease, and the catalyst powder precipitates and accumulates. For a long time, the powder will accumulate in the pipeline, causing the pipeline diameter to become smaller. In serious cases, the pipeline will be blocked, resulting in an increase in the back pressure of the discharge pipeline, poor gas-liquid separator drainage, and the risk of liquid phase entering the compressor cylinder to damage the unit, and indirectly causing the system to shut down. In addition, when cleaning the blocked pipeline, the valve on the pipeline needs to be removed. Because there are many elbows in the pipeline and there is no flange in the middle of the pipeline, the cleaning operation is cumbersome, the processing time is long, and the implementation is difficult, which has an adverse impact on the sustainable operation and production of the enterprise. Utility model content:
[0004] The utility model aims to provide an online cleaning system for BDO production pipelines, and overcomes the shortcomings of the above-mentioned prior art, and effectively solves the existing problem of pipeline blockage.
[0005] The utility model discloses an online cleaning system for pipelines used in BDO production, comprising a gas-liquid separator, wherein an exhaust pipe and a liquid discharge pipe are respectively connected to the top and bottom ends of the gas-liquid separator, a cleaning pipe is connected to the reducing pipe of the liquid discharge pipe, the cleaning pipe is connected to a cleaning liquid tank, and a nitrogen pipe and a pressure relief discharge pipe are respectively connected to the cleaning liquid tank.
[0006] Furthermore, a filter head is installed on the feed inlet of the cleaning liquid tank.
[0007] Furthermore, a first pressure gauge is installed on the variable diameter pipeline of the discharge pipe.
[0008] Furthermore, a waste liquid discharge pipe is connected to the reducing pipe of the discharge pipe, and the discharge port of the waste liquid discharge pipe is connected to the ground tank.
[0009] Furthermore, a residual liquid discharge pipe is connected to the cleaning liquid tank, and a discharge port of the residual liquid discharge pipe is connected to the waste liquid discharge pipe.
[0010] Furthermore, a second pressure gauge is installed on the cleaning liquid tank.
[0011] The beneficial effects of the utility model are as follows: by injecting the cleaning liquid in the cleaning liquid tank in a high-pressure state into the drain pipe, the blocked drain pipe can be unclogged and cleaned, avoiding the inconvenience caused by traditional disassembly and cleaning. The online cleaning system has a short dredging and cleaning time and is more convenient to dredge, thus ensuring the sustainable production of the enterprise. Description of the drawings:
[0012] Figure 1 It is a system view of the utility model;
[0013] In the figure, 1 is a gas-liquid separator, 2 is an exhaust pipe, 3 is a liquid discharge pipe, 4 is a cleaning pipe, 5 is a cleaning liquid tank, 6 is a nitrogen pipe, 7 is a pressure relief discharge pipe, 8 is a filter head, 9 is a first pressure gauge, 10 is a waste liquid discharge pipe, 11 is a ground tank, 12 is a residual liquid discharge pipe, 13 is a second pressure gauge, 14 is a hydrogen pipe, and 15 is a cooler. Specific implementation method:
[0014] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation of the present invention is now described with reference to the accompanying drawings:
[0015] like Figure 1 As shown, an online cleaning system for pipelines used in BDO production comprises a gas-liquid separator 1, wherein an exhaust pipe 2 and a drain pipe 3 are connected to the top and bottom ends of the gas-liquid separator 1, respectively, a cleaning pipe 4 is connected to the reducer of the drain pipe 3, the cleaning pipe 4 is connected to a cleaning liquid tank 5, a nitrogen pipe 6 and a pressure relief discharge pipe 7 are respectively connected to the cleaning liquid tank 5, a filter head 8 is installed on the feed port of the cleaning liquid tank 5, a first pressure gauge 9 is installed on the reducer of the drain pipe 3, a waste liquid discharge pipe 10 is connected to the reducer of the drain pipe 3, the discharge port of the waste liquid discharge pipe 10 is connected to a ground tank 11, a residual liquid discharge pipe 12 is connected to the cleaning liquid tank 5, the discharge port of the residual liquid discharge pipe 12 is connected to the waste liquid discharge pipe 10, and a second pressure gauge 13 is installed on the cleaning liquid tank 5.
[0016] Specifically, by injecting the cleaning liquid in the cleaning liquid tank 5 into the drain pipe 3 , the clogged drain pipe 3 can be cleared.
[0017] During actual use, hydrogen containing low-boiling catalyst powder is transported to the cooler 15 by the hydrogen pipe 14 for cooling, and the cooled liquid hydrogen is transported to the gas-liquid separator 1. The hydrogen after gas-liquid separation is transported to the subsequent system through the exhaust pipe 2, and the catalyst powder follows the liquid phase into the drain pipe 3. When the reducer of the drain pipe 3 is blocked after running for a period of time, the first pressure gauge 9 will detect the pressure rise in the pipeline. At this time, the staff closes the valves at both ends of the reducer of the drain pipe 3 and opens the valve of the cleaning pipe 4. The cleaning liquid prepared in the cleaning liquid tank 5 enters the reducer of the drain pipe 3 in a high-pressure state for dredging and flushing. The waste liquid generated by the dredging and flushing is transported to the ground tank 11 through the waste liquid discharge pipe 10 for temporary storage. After the pipeline is dredged, the original valve state is restored. state, the system resumes normal operation; the cleaning liquid is oxalic acid liquid. When the configured cleaning liquid enters the cleaning liquid tank 5, the filter head 8 filters the solid matter contained therein; the nitrogen pipe 6 injects nitrogen into the cleaning liquid tank 5, and slightly opens the valve of the pressure relief discharge pipe 7. At this time, the gas in the cleaning liquid tank 5 is replaced. After the gas replacement is completed, the valve of the pressure relief discharge pipe 7 is closed. After continuous filling of nitrogen, the pressure in the cleaning liquid tank 5 increases, which makes it easier for the cleaning liquid to dredge and flush the pipeline in a high-pressure state; the second pressure gauge 13 can detect the pressure of the cleaning liquid tank 5. When the cleaning pressure is dredged, the pressure in the tank is reduced, and the cleaning liquid and nitrogen are added to the cleaning liquid tank 5 in time; the remaining liquid in the cleaning liquid tank 5 is transported to the waste liquid discharge pipe 10 together with the residual liquid discharge pipe 12, and finally transported to the ground tank 11 for temporary storage.
[0018] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An online cleaning system for pipelines used in BDO production, comprising a gas-liquid separator (1), wherein an exhaust pipe (2) and a liquid discharge pipe (3) are connected to the top and bottom of the gas-liquid separator (1), respectively, and characterized in that: A cleaning pipe (4) is connected to the reducing pipe of the liquid discharge pipe (3), the cleaning pipe (4) is connected to a cleaning liquid tank (5), and a nitrogen pipe (6) and a pressure relief discharge pipe (7) are respectively connected to the cleaning liquid tank (5).
2. The BDO production pipeline online cleaning system according to claim 1, characterized in that: A filter head (8) is installed on the feed inlet of the cleaning liquid tank (5).
3. The BDO production pipeline online cleaning system according to claim 1, characterized in that: A first pressure gauge (9) is installed on the reducing pipe of the liquid discharge pipe (3).
4. The BDO production pipeline online cleaning system according to claim 1, characterized in that: A waste liquid discharge pipe (10) is connected to the reducing pipe of the liquid discharge pipe (3), and the discharge port of the waste liquid discharge pipe (10) is connected to a ground tank (11).
5. The BDO production pipeline online cleaning system according to claim 4, characterized in that: The cleaning liquid tank (5) is connected to a residual liquid discharge pipe (12), and the discharge port of the residual liquid discharge pipe (12) is connected to the waste liquid discharge pipe (10).
6. The BDO production pipeline online cleaning system according to claim 1, characterized in that: A second pressure gauge (13) is installed on the cleaning liquid tank (5).