Emergency transfer facility for water hazardous chemical substances produced by shale gas
By designing emergency transfer facilities for hazardous chemicals in shale gas production water, the problem of difficulty in recycling hazardous chemicals after leakage in storage tanks was solved, the reuse of hazardous chemicals and environmental protection were achieved, and the company's operating costs were reduced.
Patent Information
- Application Number
- CN202422961367.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-02
AI Technical Summary
There are potential risks at the leakage points of existing hazardous chemical storage tanks, which makes it difficult to recover hazardous chemicals after leakage, causing waste of resources and environmental pollution, and increasing corporate operating costs.
An emergency transfer facility for hazardous chemicals in shale gas produced water is designed, including a hazardous chemical storage tank, an emergency pool, a transfer pipeline, a recovery pipeline, a pump pressure pipeline, and a cleaning pipeline. The hazardous chemicals in the emergency pool are recovered to the transfer vehicle through the auxiliary power of a chemical pump, and multiple branch pipelines and three-way valves are set up to achieve flexible control.
It achieves effective recycling and reuse of hazardous chemicals, reduces resource waste, lowers operating costs, improves system flexibility and safety, and prevents environmental pollution.
Smart Images
Figure CN223375587U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hazardous chemical transportation, and in particular to an emergency transfer facility for hazardous chemicals such as shale gas produced water. Background Art
[0002] The use of hazardous chemicals is an integral part of industrial production, especially in the pretreatment phase of produced water treatment plants. Hazardous chemical storage tanks are specially designed for the safe storage of various hazardous chemicals, including but not limited to hydrochloric acid, sodium hydroxide, and sodium hypochlorite. These hazardous chemicals are widely used in key steps of produced water pretreatment, such as pH adjustment, disinfection, and impurity removal.
[0003] In actual operation, the outlet flange connections and valve control parts of hazardous chemical storage tanks have become potential leakage risk points due to long-term exposure to multiple factors such as medium corrosion, pressure fluctuations, temperature changes, and frequent operational wear. Leaked hazardous chemicals pollute the environment, threaten the safety and health of personnel, and even cause more serious safety accidents. The existing technology generally adopts the measure of setting up emergency pools under hazardous chemical storage tanks. As an emergency collection system, the emergency pool can quickly capture and store spilled hazardous chemicals in the event of a leak, effectively preventing them from being directly discharged into the natural environment, thereby greatly reducing the risk of environmental pollution.
[0004] Hazardous chemicals stored in emergency tanks are often difficult to effectively recycle and reuse. These chemicals, whether hydrochloric acid, sodium hydroxide, or sodium hypochlorite, are of high economic value. Directly discharging them through chemical wastewater treatment not only wastes resources but also increases operating costs for businesses. Utility Model Content
[0005] The utility model aims to provide an emergency transfer facility for hazardous chemicals in shale gas produced water, so as to solve the technical problem that the existing hazardous chemical pools cannot recover leaked hazardous chemicals.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a shale gas produced water hazardous chemical emergency transfer facility, comprising a hazardous chemical storage tank and an emergency pool for temporarily storing leaked hazardous chemicals, a transfer pipeline extending to the roadside is provided at the outlet of the hazardous chemical storage tank, a connector for connecting to a hazardous chemical transfer vehicle is provided at the end of the transfer pipeline, a transfer valve for controlling the hazardous chemical transfer process is provided on the transfer pipeline, and the transfer valve is located in the emergency pool area;
[0007] It also includes a recovery pipeline for recovering hazardous chemicals in the emergency pool. The recovery pipeline is connected to the transfer pipeline. One end of the recovery pipeline is connected to the emergency pool, and the other end is connected to the rear end of the transfer pipeline through a first three-way valve; a pump pressure pipeline is arranged on the recovery pipeline, and the pump pressure pipeline is equipped with a chemical pump for providing auxiliary power for the hazardous chemicals in the emergency pool to flow to the hazardous chemicals transfer vehicle; a cleaning pipeline is arranged on the recovery pipeline for providing clean water to the recovery pipeline for cleaning; a sewer pipeline is arranged in the emergency pool, and the sewer pipeline connects the emergency pool and the main emergency pool for chemical sewage treatment.
[0008] The principle and advantages of this solution are as follows: in actual application, when a hazardous chemical storage tank leaks, the leaked hazardous chemicals are first captured and temporarily stored in an emergency pool; then, through a recovery pipeline, the hazardous chemicals in the emergency pool can be guided to a transfer pipeline and, with the auxiliary power provided by the chemical pump on the pump-pressure pipeline, flow to a hazardous chemical transfer vehicle connected to the end of the transfer pipeline, thereby achieving the recovery and reuse of hazardous chemicals;
[0009] The emergency transfer facility effectively recovers hazardous chemicals from the emergency pool, avoiding resource waste and reducing enterprise operating costs; it also reduces the risk of hazardous chemicals being directly discharged into the environment and protects the ecological environment; the recovery process is rationally designed, easy to operate, and can quickly respond to leak incidents;
[0010] Furthermore, a flushing line is installed to provide clean water to the recovery pipeline after the recovery process is complete, ensuring internal cleanliness and preventing contamination from residual hazardous chemicals. Placing the chemical wastewater from hazardous chemicals in the next-level central emergency pool further reduces costs and improves treatment efficiency.
[0011] As an improvement, the first three-way valve has three ports, which are respectively connected to the outlet pipeline of the hazardous chemical storage tank, the recovery pipeline and the pipeline of the hazardous chemical transfer vehicle.
[0012] This improvement has the beneficial effect of enabling the system to flexibly switch between normal hazardous chemical transfer and emergency recovery processes, improving system reliability and flexibility. Under normal circumstances, hazardous chemicals flow directly to the hazardous chemical transfer vehicle through the first three-way valve; in the event of a leak, hazardous chemicals in the emergency tank can be recovered to the transfer vehicle through the recovery pipeline.
[0013] As an improvement, the pump pressure pipeline is connected to the recovery pipeline through a second three-way valve and a third three-way valve. The second three-way valve is located at the front end of the recovery pipeline, the third three-way valve is located at the rear end of the recovery pipeline, and the chemical pump is located on the pump pressure pipeline.
[0014] The beneficial effects of this improvement are: ensuring that the pump pressure pipeline can provide the necessary pressure difference to the recovery pipeline as needed, thereby promoting the smooth recovery of hazardous chemicals in the emergency pool; at the same time, through the flexible switching of the second three-way valve and the third three-way valve, effective control of the pump pressure pipeline can be achieved, thereby improving the safety and stability of the system.
[0015] As an improvement, a cleaning valve for controlling the supply of clean water is provided on the cleaning pipeline, and the cleaning pipeline is connected to the recovery pipeline between the third three-way valve and the first three-way valve.
[0016] The beneficial effect of this improvement is that after the recovery process is completed, clean water can be easily supplied to the recovery pipeline through the cleaning pipeline for cleaning, ensuring that the inside of the pipeline is clean and free of residue; the setting of the cleaning valve realizes precise control of the cleaning process, improving cleaning efficiency and safety.
[0017] As an improvement, there are multiple hazardous chemical storage tanks, and a corresponding emergency pool is provided under each hazardous chemical storage tank. The transfer pipeline includes a first branch pipeline, and each hazardous chemical storage tank is connected to the first three-way valve through the first branch pipeline; the recovery pipeline includes a second branch pipeline, and each emergency pool is connected to the second three-way valve through the second branch pipeline; the sewer pipeline includes a third branch pipeline, and each emergency pool is connected to the main emergency pool through the third branch pipeline.
[0018] The beneficial effects of this improvement are: it enables the system to handle leakage of multiple hazardous chemical storage tanks at the same time, improving the system's processing capacity and flexibility; at the same time, through the setting of branch pipelines, independent control and management of each hazardous chemical storage tank and emergency pool can be achieved, improving the reliability and safety of the system.
[0019] As an improvement, the front ends of the second branch pipe and the third branch pipe connected to each of the emergency pools are provided with branch valves for independently controlling the connection or closing of each branch pipeline.
[0020] The beneficial effects of this improvement are: it enables the system to independently control the connectivity or closure status of each branch pipeline as needed, further improving the flexibility and safety of the system; in the event of a leak, the relevant branch pipelines can be quickly closed to prevent the spread of hazardous chemicals; during cleaning or maintenance, the relevant branch pipelines can also be conveniently closed to ensure the safety and efficiency of operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the structure of the emergency transfer pipeline for a single hazardous chemical storage tank.
[0022] Figure 2 This is the recovery flow chart of the emergency transfer pipeline for a single hazardous chemical storage tank.
[0023] Figure 3 This is the cleaning flow chart for the emergency transfer pipeline of a single hazardous chemical storage tank.
[0024] Figure 4 This is a schematic diagram of the structure of the emergency transfer pipeline for multiple hazardous chemical storage tanks. DETAILED DESCRIPTION
[0025] The following is further described in detail through specific implementation methods:
[0026] The figure marks in the drawings of the specification include: hazardous chemical storage tank 1, emergency pool 2, hazardous chemical transfer vehicle 3, main emergency pool 4, transfer pipeline 5, recovery pipeline 6, pump pressure pipeline 7, cleaning pipeline 8, sewer pipeline 9, first three-way valve 10, second three-way valve 11, third three-way valve 12, sewer valve 13, cleaning valve 14, first branch pipeline 15, second branch pipeline 16, third branch pipeline 17, second branch valve 18, third branch valve 19, transfer valve 20 and chemical pump 21.
[0027] Example
[0028] The utility model provides an emergency transfer facility for hazardous chemicals produced from shale gas. The structure of the emergency transfer pipeline 5 of a single hazardous chemical storage tank 1 is basically as shown in the attached figure. Figure 1 As shown, hazardous chemical storage tank 1 is used to store hazardous chemicals such as hydrochloric acid, sodium hydroxide, and sodium hypochlorite required for pretreatment at the produced water treatment station. In this embodiment, the process of hazardous chemical liquid flowing through the pipeline is called a flow process; the liquid inlet end of the pipeline is called the pipeline front end, and the liquid outlet end is called the pipeline back end.
[0029] An emergency pool 2 is provided below the hazardous chemical storage tank 1, and a transfer pipeline 5 is provided at the outlet of the hazardous chemical storage tank 1 for extending the transfer process of hazardous chemicals to the roadside, and a joint is provided at the end of the transfer pipeline 5 to connect with the hazardous chemical transfer vehicle 3, so that the hazardous chemicals in the hazardous chemical storage tank 1 can flow directly into the hazardous chemical transfer vehicle 3 through the transfer pipeline 5.
[0030] A transfer valve 20 for connecting or closing the transfer pipeline 5 is provided on the transfer pipeline 5. The transfer valve 20 is arranged in the emergency pool 2 area, so that during the transfer process, when the flange at the outlet of the hazardous chemical storage tank 1 or the transfer valve 20 of the transfer pipeline 5 leaks, the leaked hazardous chemicals can directly drip into the emergency pool 2 for temporary storage, avoiding the emergency pool 2 from directly overflowing and polluting the external environment.
[0031] To recycle hazardous chemicals within the emergency tank 2 and reduce waste, a recovery pipeline 6 is connected to the transfer pipeline 5. One end of the recovery pipeline 6 is connected to the emergency tank 2, and the other end is connected to the rear end of the transfer pipeline 5 via a first three-way valve 10. One port of the first three-way valve 10 is connected to the pipeline at the outlet of the hazardous chemical storage tank, another port is connected to the pipeline of the hazardous chemical transfer vehicle 3, and yet another port of the first three-way valve 10 is connected to the recovery pipeline 6 of the emergency tank 2.
[0032] The recovery line 6 is also provided with a pumping line 7, the two ends of which are connected to the recovery line 6 via a second three-way valve 11 and a third three-way valve 12, respectively. The pumping line 7 is provided with a chemical pump 21 for providing auxiliary power for the flow of hazardous chemicals from the emergency pool 2 to the hazardous chemical transfer vehicle 3. The second three-way valve 11 is located at the front end of the recovery line 6 compared to the third three-way valve 12. Both ports of the second three-way valve 11 are connected to the recovery line 6, and the other port of the second three-way valve 11 is connected to the front end of the pumping line 7. Both ports of the third three-way valve 12 are connected to the recovery line 6, and the other port of the third three-way valve 12 is connected to the rear end of the pumping line 7.
[0033] A flushing line 8 connects the recovery line 6 between the third three-way valve 12 and the first three-way valve 10. This flushing line 8 supplies clean water to the recovery line 6 and is equipped with a flushing valve 14 to control the supply of clean water. A sewer line 9 connects the emergency pool 2 to the main emergency pool 4 of the water treatment station, where chemical wastewater is treated. Sewer line 9 is equipped with a sewer valve 13 to control the connection.
[0034] The specific implementation process is as follows:
[0035] When the hazardous chemicals in the hazardous chemicals storage tank 1 flow to the hazardous chemicals transfer vehicle 3 under normal circumstances without leakage, the transfer valve 20 is opened, the two ports of the first three-way valve 10 connected to the transfer pipeline are opened, and the port of the first three-way valve 10 connected to the recovery pipeline 6 is closed, and the hazardous chemicals in the hazardous chemicals storage tank 1 flow from the transfer pipeline 5 to the hazardous chemicals transfer vehicle 3.
[0036] During the transfer process, if there is leakage at the outlet flange or transfer valve of hazardous chemicals storage tank 1, the hazardous chemicals recovery process of the shale gas produced water hazardous chemicals emergency transfer facility is as shown in the attached figure. Figure 2 As shown, the three ports of the first three-way valve 10 are all open; the port of the second three-way valve 11 near the front end of the recovery pipeline 6 and the port connected to the pump pressure pipeline 7 are open, and the port of the second three-way valve 11 near the rear end of the recovery pipeline 6 is closed; the port of the third three-way valve 12 near the rear end of the recovery pipeline 6 and the port connected to the pump pressure pipeline 7 are open, and the port of the third three-way valve 12 near the front end of the recovery pipeline 6 is closed; the chemical pump 21 starts running; the cleaning valve 14 and the drain valve 13 are closed.
[0037] The hazardous chemicals in the hazardous chemical storage tank 1 flow from the transfer pipeline 5 to the hazardous chemical transfer vehicle 3. The hazardous chemicals leaked into the emergency pool 2 enter the pumping pipeline 7 through the recovery pipeline 6, then flow back from the pumping pipeline 7 to the recovery pipeline 6, and finally merge into the transfer pipeline 5 and enter the hazardous chemical transfer vehicle 3.
[0038] After the transfer and recovery process of hazardous chemicals is completed, the hazardous chemicals cleaning process of the shale gas produced water hazardous chemicals emergency transfer facility is as shown in the attached Figure 3 As shown, the transfer valve 20 is closed, the three ports of the first three-way valve 10 are all closed, the ports of the second three-way valve 11 and the third three-way valve 12 connected to the recovery pipeline 6 are all open, the ports of the second three-way valve 11 and the third three-way valve 12 connected to the pump pressure pipeline 7 are all closed, and the chemical pump 21 is closed; the cleaning valve 14 and the drain valve 13 are open.
[0039] The clean water from the cleaning pipeline 8 flows into the recovery pipeline 6, and the clean water flows in the recovery pipeline 6 in the reverse direction from the rear end to the front end. The clean water flushes the inner wall of the recovery pipeline 6 during the flow process. Finally, the flushed sewage flows out from the recovery pipeline 6 to the emergency pool 2, further flushes the emergency pool 2, and finally flows into the main emergency pool 4 through the sewer pipeline 9.
[0040] When there are multiple hazardous chemicals storage tanks 1, as shown in the attached Figure 4 As shown, a corresponding emergency pool 2 is provided under each hazardous chemical storage tank 1, and the transfer pipeline 5 also includes a first branch pipeline 15. Each hazardous chemical storage tank 1 is connected to the first three-way valve 10 through the first branch pipeline 15. The front end of the first branch pipeline 15 is respectively connected to the outlet end of the transfer valve 20 of each hazardous chemical storage tank 1, and the rear end of the first branch pipeline 15 is aggregated and connected to the port of the first three-way valve 10 near the front end. Compared with the first three-way valve 10, the first branch pipeline 15 is located at the front end of the transfer pipeline 5.
[0041] The recovery pipeline 6 also includes a second branch pipeline 16. The emergency pool 2 corresponding to each hazardous chemical storage tank 1 is connected to the second three-way valve 11 through the second branch pipeline 16. The front end of the second branch pipeline 16 is connected to each emergency pool 2 respectively. The rear end of the second branch pipeline 16 is connected to the port near the front end of the second three-way valve 11 after being combined. The second branch pipeline 16 is located at the front end of the recovery pipeline 6 compared to the second three-way valve 11. The front end of the second branch pipe connected to each emergency pool 2 is provided with a second branch valve 18 for controlling the connection or closing of the branch pipe.
[0042] The sewer line 9 also includes a third branch line 17, which connects the emergency pool 2 corresponding to each hazardous chemical storage tank 1 to the central emergency pool 4. The front end of each third branch line 17 is connected to each emergency pool 2, and the rear end of each third branch line 17 is connected to the central emergency pool 4. The front end of each third branch pipe connecting to each emergency pool 2 is equipped with a third branch valve 19 for controlling the connection or closing of the branch pipe.
[0043] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A shale gas produced water hazardous chemical emergency transfer facility, comprising a hazardous chemical storage tank and an emergency pool for temporarily storing leaked hazardous chemicals. The outlet of the hazardous chemical storage tank is provided with a transfer pipeline extending to the roadside. The end of the transfer pipeline is provided with a connector for connecting to a hazardous chemical transfer vehicle. The transfer pipeline is provided with a transfer valve for controlling the hazardous chemical transfer process. The transfer valve is located within the emergency pool. The facility is characterized by: It also includes a recovery pipeline for recovering hazardous chemicals in the emergency pool. The recovery pipeline is connected to the transfer pipeline. One end of the recovery pipeline is connected to the emergency pool, and the other end is connected to the rear end of the transfer pipeline through a first three-way valve; a pump pressure pipeline is arranged on the recovery pipeline, and the pump pressure pipeline is equipped with a chemical pump for providing auxiliary power for the hazardous chemicals in the emergency pool to flow to the hazardous chemicals transfer vehicle; a cleaning pipeline is arranged on the recovery pipeline for providing clean water to the recovery pipeline for cleaning; a sewer pipeline is arranged in the emergency pool, and the sewer pipeline connects the emergency pool and the main emergency pool for chemical sewage treatment.
2. The shale gas produced water hazardous chemical emergency transfer facility according to claim 1, characterized in that: The first three-way valve has three ports, which are respectively connected to the outlet pipeline of the hazardous chemical storage tank, the recovery pipeline and the pipeline of the hazardous chemical transfer vehicle.
3. The shale gas produced water hazardous chemical emergency transfer facility according to claim 2, characterized in that: The pump pressure pipeline is connected to the recovery pipeline through the second three-way valve and the third three-way valve. The second three-way valve is located at the front end of the recovery pipeline, and the third three-way valve is located at the rear end of the recovery pipeline. The chemical pump is located on the pump pressure pipeline.
4. The shale gas produced water hazardous chemical emergency transfer facility according to claim 3, characterized in that: The cleaning pipeline is provided with a cleaning valve for controlling the supply of clean water, and the cleaning pipeline is connected to the recovery pipeline between the third three-way valve and the first three-way valve.
5. The shale gas produced water hazardous chemical emergency transfer facility according to claim 4, characterized in that: There are multiple hazardous chemical storage tanks, and a corresponding emergency pool is provided under each hazardous chemical storage tank. The transfer pipeline includes a first branch pipeline, and each hazardous chemical storage tank is connected to the first three-way valve through the first branch pipeline; the recovery pipeline includes a second branch pipeline, and each emergency pool is connected to the second three-way valve through the second branch pipeline; the sewer pipeline includes a third branch pipeline, and each emergency pool is connected to the main emergency pool through the third branch pipeline.
6. The shale gas produced water hazardous chemical emergency transfer facility according to claim 5, characterized in that: The front ends of the second branch pipe and the third branch pipe connected to each of the emergency pools are both provided with branch valves for independently controlling the connection or closing of each branch pipeline.