Flare gas condensate recovery device of naphtha separation system

Abstract

According to the naphtha separation system flare gas condensate recovery device, a liquid output port of a flare liquid separation tank is connected with an inlet of a naphtha product storage tank through a conveying pump pipeline, and the conveying pump pipeline comprises a main conveying pump, a first gate valve, a filter, a first check valve, a second check valve and a second gate valve; a first gate valve and a filter are sequentially arranged on a pipeline between an inlet of the delivery pump and a liquid output port of the torch liquid separation tank in the liquid flowing direction; and a first check valve, a second check valve and a second gate valve are sequentially arranged on a pipeline between an outlet of the delivery pump and an inlet of the naphtha product storage tank in the liquid flowing direction. Condensate in the torch liquid separation tank is conveyed to the naphtha product storage tank through the conveying pump pipeline, the naphtha yield is increased, meanwhile, light dirty oil is reduced, the effective yield of the device is increased, and the operation cost of the device is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of naphtha separation equipment, and in particular relates to a flare condensate recovery 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] The main function of the flare separator in the naphtha separation system is to remove the condensate entrained in the vented natural gas to reduce the amount of condensate in the vent main pipe and prevent the droplets from being brought to the flare head to form fire rain, thereby ensuring the safe operation of the flare. In the actual production process, the gas phase components of the flare separator are partially condensed into a liquid phase when the ambient temperature reaches -4°C or below, and about 5 tons of condensate are produced per month. The existing technology discharges the condensate of the flare separator directly into the underground slop oil tank as waste oil, resulting in a decrease in product yield. According to the analysis, the oil products of the condensate in the flare separator meet all the indicators of naphtha. If the condensate can be recovered, the product yield will be greatly improved. Therefore, there is an urgent need for a condensate recovery device for the flare separator. 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 flare condensate recovery device for a naphtha separation system which has stable and safe operation and high product yield.

[0005] The technical solution adopted to solve the above technical problems is: a flare condensate recovery device for a naphtha separation system, wherein the liquid outlet of the flare separator tank is connected to the inlet of a naphtha product storage tank through a delivery pump pipeline, wherein the delivery pump pipeline includes a main delivery pump, a first gate valve, a filter, a first check valve, a second check valve, and a second gate valve, and a first gate valve and a filter are sequentially arranged on the pipeline between the delivery pump inlet and the liquid outlet of the flare separator tank along the direction of liquid flow, and a first check valve, a second check valve, and a second gate valve are sequentially arranged on the pipeline between the delivery pump outlet and the inlet of the naphtha product storage tank along the direction of liquid flow.

[0006] As a preferred technical solution, a first branch pipeline is connected between the inlet of the first gate valve and the outlet of the second gate valve on the delivery pump pipeline, and a stop valve is arranged on the branch pipeline.

[0007] As a preferred technical solution, an output gate valve is provided on the pipeline between the liquid output port of the torch liquid separator tank and the first gate valve.

[0008] As a preferred technical solution, a third gate valve, a second branch pipeline, and a fourth gate valve are sequentially arranged on the pipeline between the second gate valve and the inlet of the naphtha product storage tank, and a fifth gate valve is arranged on the second branch pipeline.

[0009] As a preferred technical solution, a third branch pipeline is provided on the pipeline between the delivery pump outlet and the first check valve, and a sixth gate valve is provided on the third branch pipeline.

[0010] The beneficial effects of the utility model are as follows:

[0011] The utility model utilizes a delivery pump pipeline to deliver condensate in a flare liquid separation tank to a naphtha product storage tank, thereby increasing naphtha production while reducing light dirty oil generation, improving the effective yield of the device, and saving device operating costs.

[0012] By arranging a plurality of valves and branches in the delivery pump pipeline of the utility model, even if a certain part fails, the operation of the system can be maintained by switching to a backup path, thereby improving the reliability of the entire delivery system and facilitating the maintenance and overhaul of specific parts, optimizing the efficiency of the entire delivery system, and reducing pressure loss and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Among them: flare liquid separation tank 1, output gate valve 2, first gate valve 3, filter 4, main delivery pump 5, sixth gate valve 6, first check valve 7, second check valve 8, second gate valve 9, stop valve 10, third gate valve 11, fourth gate valve 13, fifth gate valve 12, naphtha product storage tank 14. DETAILED DESCRIPTION

[0015] 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.

[0016] exist Figure 1 In the naphtha separation system flare condensate recovery device of this embodiment, the liquid outlet of the flare separator tank 1 is connected to the inlet of the naphtha product storage tank 14 through a delivery pump pipeline, and the delivery pump pipeline is used to deliver the condensate produced by the flare separator tank 1 to the naphtha product storage tank 14.

[0017] The delivery pump pipeline includes a main delivery pump 5, a first gate valve 3, a filter 4, a first check valve 7, a second check valve 8, a second gate valve 9, a stop valve 10, an output gate valve 2, a third gate valve 11, a fourth gate valve 13, a fifth gate valve 12, and a sixth gate valve 6.

[0018] An output gate valve 2, a first gate valve 3, and a filter 4 are sequentially arranged on the pipeline between the delivery pump inlet and the liquid outlet of the flare liquid separation tank 1 along the liquid flow direction, and a first check valve 7, a second check valve 8, and a second gate valve 9 are sequentially arranged on the pipeline between the delivery pump outlet and the inlet of the naphtha product storage tank 14 along the liquid flow direction. A first branch pipeline is connected between the inlet of the first gate valve 3 and the outlet of the second gate valve 9, and a stop valve 10 is arranged on the branch pipeline. The filter 4 is used to remove impurities in the delivery liquid and protect the delivery pump from wear or blockage. The output gate valve 2 and the stop valve 10 are used to cut off the connection between the flare liquid separation tank 1 and the delivery pump when necessary, providing additional safety protection for the system. The first check valve 7 and the second check valve 8 are used to prevent the liquid from flowing back to the delivery pump when the pump stops working, protecting the pump from backflow damage.

[0019] A third branch pipeline is provided on the pipeline between the delivery pump outlet and the first check valve 7 of this embodiment, and a sixth gate valve 6 is installed on the third branch pipeline. The sixth gate valve 6 is used to adjust the flow direction of the liquid at the delivery pump outlet as required, thereby increasing the flexibility of operation.

[0020] In this embodiment, the pipeline between the second gate valve 9 and the entrance of the naphtha product storage tank 14 is provided with a third gate valve 11, a second branch pipeline, and a fourth gate valve 13 in sequence, and the second branch pipeline is provided with a fifth gate valve 12. The third gate valve 11, the fourth gate valve 13, and the fifth gate valve 12 are used to isolate the naphtha product storage tank 14 from other parts when necessary to prevent the product from being contaminated.

[0021] The first gate valve 3, the second gate valve 9, the third gate valve 11 and the fourth gate valve 13 of the present embodiment can simultaneously accurately control the flow rate and flow direction of the liquid.

[0022] The delivery pump pipeline of the utility model is provided with a plurality of valves and branches, so that even if a certain part fails, the operation of the system can be maintained by switching to a backup path, thereby improving the reliability of the entire delivery system.

Claims

1. A flare condensate recovery device for a naphtha separation system, characterized in that: The liquid outlet of the flare separator tank is connected to the inlet of the naphtha product storage tank through a delivery pump pipeline. The delivery pump pipeline includes a main delivery pump, a first gate valve, a filter, a first check valve, a second check valve, and a second gate valve. The first gate valve and the filter are sequentially arranged on the pipeline between the delivery pump inlet and the liquid outlet of the flare separator tank along the liquid flow direction. The first check valve, the second check valve, and the second gate valve are sequentially arranged on the pipeline between the delivery pump outlet and the inlet of the naphtha product storage tank along the liquid flow direction.

2. The flare condensate recovery device for naphtha separation system according to claim 1, characterized in that: A first branch pipeline is connected between the first gate valve inlet and the second gate valve outlet on the delivery pump pipeline, and a stop valve is arranged on the branch pipeline.

3. The flare condensate recovery device for naphtha separation system according to claim 1, characterized in that: An output gate valve is arranged on the pipeline between the liquid output port of the torch liquid separation tank and the first gate valve.

4. The flare condensate recovery device for naphtha separation system according to claim 1, characterized in that: The pipeline between the second gate valve and the inlet of the naphtha product storage tank is provided with a third gate valve, a second branch pipeline and a fourth gate valve in sequence, and the second branch pipeline is provided with a fifth gate valve.

5. The flare condensate recovery device for naphtha separation system according to claim 1, characterized in that: A third branch pipeline is arranged on the pipeline between the delivery pump outlet and the first check valve, and a sixth gate valve is arranged on the third branch pipeline.

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