Condensed water delivery device of naphtha separation system

Abstract

A naphtha separation system condensation water delivery device is characterized in that a conveying main gate valve is arranged on a condensation water output main pipe, a first branch pipeline is connected to the condensation water output main pipe on the inlet side of the conveying main gate valve, and a second branch pipeline is connected to the condensation water output main pipe on the outlet side of the conveying main gate valve; and a conveying pump pipeline is arranged between the first branch pipeline and the second branch pipeline. The delivery pump pipeline is composed of the main delivery pump pipeline and the standby delivery pump pipeline which are connected in parallel, and when the main delivery pump pipeline is regularly maintained or emergently repaired, the standby delivery pump pipeline can be connected to work, so that the downtime is shortened, and the delivery pump has the advantage of being convenient to maintain. And when the high-flow requirement is met, the main delivery pump pipeline and the standby delivery pump pipeline operate at the same time, loads are shared, and the processing capacity of the system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of condensate treatment, and in particular relates to a condensate delivery device for a naphtha separation system. Background Art

[0002] Naphtha, also known as chemical light oil and crude gasoline, is a light oil used as chemical raw materials produced from crude oil or other raw materials. It is mainly used as a chemical raw material for the production of ethylene, aromatics or high-octane gasoline and other products. Since the naphtha fractions used to produce different products are different, the produced naphtha needs to be separated into different fractions in the naphtha separation system to facilitate the subsequent processing of different products.

[0003] In the actual production process, the liquid oil produced at the bottom of the naphtha separation device needs to be heated and vaporized before further separation to improve the separation rate of naphtha. In the prior art, the condensate produced by heating the liquid oil is sent to the condensate network through the pressure of the condensate flash tank itself. During normal operation, the pressure of the condensate network outside the network often fluctuates. When the pressure of the condensate network is too high, the high-pressure steam condensate in the condensate flash tank cannot be sent out, resulting in the condensate flash tank liquid level being too high, affecting the normal operation of the system. In severe cases, it may cause product failure or even system shutdown. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a condensate delivery device for a naphtha separation system which has a simple structure, low cost, convenient maintenance and improved system operation efficiency.

[0005] The technical solution adopted to solve the above technical problems is: a condensate delivery device for a naphtha separation system, a main delivery gate valve is arranged on the condensate output main pipe, a first branch pipeline is connected to the condensate output main pipe on the inlet side of the delivery main gate valve, a second branch pipeline is connected to the condensate output main pipe on the outlet side of the delivery main gate valve, and a delivery pump pipeline is arranged between the first branch pipeline and the second branch pipeline.

[0006] As a preferred technical solution, the delivery pump pipeline is composed of a main delivery pump pipeline and a backup delivery pump pipeline connected in parallel, and the main delivery pump pipeline and the backup delivery pump pipeline have the same structure.

[0007] As a preferred technical solution, the main delivery pump pipeline includes a main delivery pump, a first gate valve, a filter, a check valve, and a second gate valve. The first gate valve and the filter are sequentially arranged on the pipeline between the main delivery pump inlet and the first branch pipeline along the direction of liquid flow, and the check valve and the second gate valve are sequentially arranged on the pipeline between the main delivery pump outlet and the second branch pipeline along the direction of liquid flow.

[0008] As a preferred technical solution, a third branch pipeline is connected between the inlet of the first gate valve and the outlet of the second gate valve on the main delivery pump pipeline, and a stop valve is arranged on the third branch pipeline.

[0009] As a preferred technical solution, a first side branch pipe and a second side branch pipe are sequentially connected to the pipeline between the first gate valve and the filter, a third gate valve is arranged on the first side branch pipe, and a fourth gate valve is arranged on the second side branch pipe.

[0010] As a preferred technical solution, a third side branch pipe is connected to the pipeline between the outlet of the main delivery pump and the inlet of the check valve, and a fifth gate valve is arranged on the third side branch pipe.

[0011] As a preferred technical solution, an input main gate valve is provided between the first branch pipeline and the condensate output main pipe.

[0012] As a preferred technical solution, an output main gate valve is provided between the second branch pipeline and the condensate output main pipe.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model installs a delivery main gate valve on the condensate output main pipe, and connects a delivery pump pipeline in parallel on one side of the delivery main gate valve. When the pressure of the condensate network is too high, the condensate is delivered through the delivery pump pipeline, thereby ensuring the continuous and safe operation of the system, avoiding production interruption, and improving production efficiency.

[0015] The delivery pump pipeline of the utility model is composed of a main delivery pump pipeline and a spare delivery pump pipeline connected in parallel. When the main delivery pump pipeline is undergoing regular maintenance or emergency repair, the spare delivery pump pipeline can take over the work, thereby reducing downtime and having the characteristics of convenient maintenance. When high flow demand occurs, the main delivery pump pipeline and the spare delivery pump pipeline operate simultaneously to share the load and improve the processing capacity of the system. The configuration of the spare delivery pump pipeline increases the redundancy of the system and improves the overall fault tolerance. The utility model as a whole has the advantages of safety, reliability and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Among them: condensate output main pipe 1, delivery main gate valve 2, input main gate valve 3, output main gate valve 4, main delivery pump pipeline 5, spare delivery pump pipeline 6, first gate valve 51, third gate valve 52, fourth gate valve 53, filter 54, main delivery pump 55, fifth gate valve 56, check valve 57, second gate valve 58. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0019] exist Figure 1 In the embodiment of the present invention, a condensate delivery device of a naphtha separation system is provided, and a delivery main gate valve 2 is installed on the condensate output main pipe 1. The condensate output main pipe 1 is a pipeline between the compressed condensate flash tank and the condensate network. A first branch pipeline is connected to the condensate output main pipe 1 on the inlet side of the delivery main gate valve 2, and an input main gate valve 3 is installed between the first branch pipeline and the condensate output main pipe 1. A second branch pipeline is connected to the condensate output main pipe 1 on the outlet side of the delivery main gate valve 2, and an output main gate valve 4 is installed between the second branch pipeline and the condensate output main pipe 1, and a delivery pump pipeline is installed between the first branch pipeline and the second branch pipeline. Under normal operation, close the input main gate valve 3 and the output main gate valve 4, open the delivery main gate valve 2 on the condensate output main pipe 1, and the condensate flash tank will deliver the condensate to the condensate network under its own pressure. When the pressure of the condensate network is too high, close the delivery main gate valve 2, open the input main gate valve 3 and the output main gate valve 4, and start the delivery pump pipeline to deliver the condensate generated by the condensate flash tank to the condensate network through the delivery pump pipeline.

[0020] The delivery pump pipeline of this embodiment is composed of a main delivery pump pipeline 5 and a backup delivery pump pipeline 6 connected in parallel, and the main delivery pump pipeline 5 and the backup delivery pump pipeline 6 have the same structure. When the main delivery pump pipeline 5 in operation fails, the backup delivery pump pipeline 6 is immediately started to ensure the continuous operation of the system and avoid production interruption. During the maintenance process, the backup delivery pump pipeline 6 can take over the work, thereby reducing downtime. In some cases, the two sets of delivery pump pipelines can run at the same time to share the load, especially when high flow demand can improve the processing capacity of the system.

[0021] The main delivery pump pipeline 5 of this embodiment includes a main delivery pump 55, a first gate valve 51, a filter 54, a check valve 57, and a second gate valve 58. The first gate valve 51 and the filter 54 are sequentially arranged on the pipeline between the inlet of the main delivery pump 55 and the first branch pipeline along the liquid flow direction, and the check valve 57 and the second gate valve 58 are sequentially arranged on the pipeline between the outlet of the main delivery pump 55 and the second branch pipeline along the liquid flow direction. The check valve 57 is used to prevent condensed water from flowing back when the main delivery pump 55 stops working, protecting the pump and the pipeline system from the influence of backflow. A third branch pipeline is connected between the inlet of the first gate valve 51 and the outlet of the second gate valve 58 on the main delivery pump pipeline 5, and a stop valve is arranged on the third branch pipeline. The stop valve controls the inlet flow of the main delivery pump 55 to adjust the working state of the pump, and cuts off the inlet of the main delivery pump 55 during maintenance or overhaul to prevent the fluid from entering the pump body.

[0022] The pipeline between the first gate valve 51 and the filter 54 of this embodiment is connected with the first side branch pipe and the second side branch pipe in sequence, the first side branch pipe is provided with the third gate valve 52, the second side branch pipe is provided with the fourth gate valve 53, the pipeline between the outlet of the main delivery pump 55 and the inlet of the check valve 57 is connected with the third side branch pipe, and the third side branch pipe is provided with the fifth gate valve 56. The third gate valve 52, the fourth gate valve 53, and the fifth gate valve 56 are used to release pressure and drain water when a failure occurs in the pipeline section where each branch pipe is located, so as to facilitate maintenance.

Claims

1. A condensate delivery device for a naphtha separation system, characterized in that: A delivery main gate valve is arranged on the condensate output main pipe, a first branch pipeline is connected to the condensate output main pipe on the inlet side of the delivery main gate valve, a second branch pipeline is connected to the condensate output main pipe on the outlet side of the delivery main gate valve, and a delivery pump pipeline is arranged between the first branch pipeline and the second branch pipeline.

2. The condensate delivery device of the naphtha separation system according to claim 1, characterized in that: The delivery pump pipeline is composed of a main delivery pump pipeline and a standby delivery pump pipeline connected in parallel, and the main delivery pump pipeline and the standby delivery pump pipeline have the same structure.

3. The condensate delivery device of the naphtha separation system according to claim 2, characterized in that: The main delivery pump pipeline includes a main delivery pump, a first gate valve, a filter, a check valve, and a second gate valve. The first gate valve and the filter are sequentially arranged on the pipeline between the main delivery pump inlet and the first branch pipeline along the direction of liquid flow, and the check valve and the second gate valve are sequentially arranged on the pipeline between the main delivery pump outlet and the second branch pipeline along the direction of liquid flow.

4. The condensate delivery device for the naphtha separation system according to claim 3, characterized in that: A third branch pipeline is connected between the first gate valve inlet and the second gate valve outlet on the main delivery pump pipeline, and a stop valve is arranged on the third branch pipeline.

5. The condensate delivery device for naphtha separation system according to claim 3 or 4, characterized in that: The pipeline between the first gate valve and the filter is connected with a first side branch pipe and a second side branch pipe in sequence, the first side branch pipe is provided with a third gate valve, and the second side branch pipe is provided with a fourth gate valve.

6. The condensate delivery device of the naphtha separation system according to claim 5, characterized in that: A third side branch pipe is connected to the pipeline between the outlet of the main delivery pump and the inlet of the check valve, and a fifth gate valve is arranged on the third side branch pipe.

7. The condensate delivery device for naphtha separation system according to claim 1 or 6, characterized in that: An input main gate valve is arranged between the first branch pipeline and the condensate output main pipe.

8. The condensate delivery device for naphtha separation system according to claim 1 or 6, characterized in that: An output main gate valve is arranged between the second branch pipeline and the condensate output main pipe.

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