Combustible liquid purging buffer tank

Abstract

The utility model relates to a combustible liquid purging buffer tank which comprises a storage tank, a separation tank, an inlet line, an outlet line and an exhaust line, and a liquid inlet line is arranged on the lower portion of the storage tank. One end of the inlet line is communicated with the upper part of the separation tank, the other end is communicated with the oil pipeline, one end of the outlet line is communicated with the lower part of the separation tank, and the other end is communicated with the liquid inlet line; a base plate which is vertically arranged, a buffer plate which is obliquely arranged downwards, an umbrella plate with holes and a liquid discharge plate with a liquid discharge port in the middle are sequentially arranged in the separation tank from top to bottom; an exhaust pipe is arranged in the separation tank, the upper end of the exhaust pipe is communicated with an exhaust line through an air outlet pipe, the lower end of the exhaust pipe sequentially penetrates through the buffer plate and the umbrella plate, and a plurality of groups of exhaust holes corresponding to the buffer plate, the umbrella plate and the liquid drainage plate are formed in the exhaust pipe. According to the utility model, liquid and gas-liquid mixtures are subjected to multi-stage buffering and separation, so that the impact of gas on the inner floating disc is reduced, and the risk of damage to the inner floating disc is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the oil chemical industry oil product storage and transportation technical field, especially relates to a combustible liquid purging buffer tank. BACKGROUND

[0002] The inner floating roof storage tank is a common storage equipment in many industries such as petroleum and chemical industry, and is used for storing various volatile liquid materials, and these industries have strict requirements on the safety, stability and environmental protection of the material storage.

[0003] In the purging operation of the oil pipeline, nitrogen purging is a conventional cleaning and maintenance method, however, the existing inner floating roof storage tank is directly impacted by nitrogen when nitrogen enters the inner floating roof storage tank due to the pressure and flow rate of nitrogen and other factors, and the inner floating plate, as an important component of the inner floating roof storage tank, is relatively weak in structure and lacks effective protection mechanism when facing the impact of nitrogen purging, and is often blown out, which not only affects the normal use of the inner floating roof storage tank, but also may cause a series of problems such as material leakage and intensified volatilization, so it is necessary to set a corresponding gas-liquid separation device to reduce the gas entering the inside of the storage tank during pipeline purging.

[0004] The current gas-liquid separation device only separates the liquid once and then discharges the liquid into the storage tank, so that there is still a lot of gas in the liquid, and if the gas-liquid mixture directly acts on the inner floating plate, it will increase the risk of damage to the inner floating plate, and the separation device may carry some liquid impurities or generate some condensate itself, which will affect the quality of the oil if it enters the storage tank. UTILITY MODEL CONTENTS

[0005] To solve the problems in the prior art, the utility model provides a combustible liquid purging buffer tank, which effectively prevents the damage of the inner floating plate during nitrogen purging by setting a gas-liquid separation tank.

[0006] The utility model discloses a combustible liquid purging buffer tank which comprises a storage tank, a separation tank, an inlet line, an outlet line and an exhaust line.

[0007] Further, the inlet line is sequentially provided with an inlet valve and a chain valve along the flow direction of the liquid.

[0008] Further, the exhaust line is provided with a gas phase line valve.

[0009] Further, the bottom of the separation tank is communicated with a condensate discharge line which is sequentially provided with a first condensate discharge valve, a sight glass and a second condensate discharge valve along the flow direction of the liquid.

[0010] Further, the outlet line is sequentially provided with a separation tank outlet valve and a check valve along the flow direction of the liquid.

[0011] Further, the inlet line is provided with a tank root valve at one end close to the storage tank and an operation valve at the other end.

[0012] Further, the outlet end of the inlet line extends into the separation tank and is provided with an elbow at the end, and the outlet end of the elbow is opposite to the pad.

[0013] Further, the exhaust pipe is provided with a cover plate at the exhaust holes corresponding to the umbrella plate and the liquid discharge plate.

[0014] In conclusion, the utility model discloses a separation tank including a cushion plate, a buffer plate, an umbrella plate and a liquid discharge plate in the inside for multi-stage buffering and separating liquid and gas-liquid mixture, and the exhaust pipe can discharge gas in multiple stages, so that the gas and liquid in the liquid and gas-liquid mixture produced during pipeline purging are separated more thoroughly, the impact of the gas on the inner floating disc is reduced, and the risk of damage to the inner floating disc is reduced.

[0015] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of the utility model tank pipeline and gas-liquid separation device. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model is further described below in combination with the drawings and preferred embodiments.

[0018] Please refer to Figure 1 A combustible liquid purging buffer tank, comprising a storage tank 1, a separation tank 7, an inlet line 13, an outlet line 4 and an exhaust line 16, the lower part of the storage tank 1 is provided with a liquid inlet line 2, one end of the inlet line 13 is communicated with the upper part of the separation tank 7, and the other end is communicated with the oil pipeline, one end of the outlet line 4 is communicated with the lower part of the separation tank 7, and the other end is communicated with the liquid inlet line 2, the outlet line 4 is provided with a separation tank outlet valve 5 and a check valve 22 in sequence along the liquid flow direction, one end of the liquid inlet line 2 close to the storage tank 1 is provided with a tank root valve 3, and the other end is provided with an operating valve 6, the exhaust line 16 is communicated with the top of the separation tank 7, and the exhaust line 16 is provided with a gas phase line valve 17.

[0019] The inlet line 13 is provided with an inlet valve 23 and a interlock valve 14 in sequence along the liquid flow direction, under normal circumstances, the inlet valve 23 is in a normally closed state, when the pipeline is purged, the inlet valve 23 is opened, the separation tank 7 is provided with a liquid level meter 8 interlocked with the interlock valve 14, when the liquid level is higher than the lower end of the exhaust pipe 25 or lower than the lower end of the outlet line 4, the interlock valve 14 is closed, the outlet end of the inlet line 13 extends into the separation tank 7, and the end part is provided with a bend pipe 15, and the outlet end of the bend pipe 15 is opposite to the cushion plate 9.

[0020] The separation tank 7 is sequentially provided with a vertical cushion plate 9, an inclined buffer plate 10, a hole umbrella plate 11 and a liquid discharge plate 12 with a liquid discharge port in the middle from top to bottom.

[0021] The separation tank 7 is sequentially provided with a vertical cushion plate 9, an inclined buffer plate 10, a hole umbrella plate 11 and a liquid discharge plate 12 with a liquid discharge port in the middle from top to bottom.

[0022] The bottom of the separation tank 7 is communicated with a condensate discharge line 21, and the condensate discharge line 21 is sequentially provided with a first condensate discharge valve 18, a sight glass 19 and a second condensate discharge valve 20 along the liquid flow direction.

[0023] The utility model discloses a working principle:

[0024] Normally, the separation tank 7 is empty, the outlet valve 5, the inlet valve 23 and the gas phase line valve 17 are closed, when the pipeline is purged, the outlet valve 5, the inlet valve 23 and the gas phase line valve 17 are opened, the purging liquid or gas-liquid mixture enters the separation tank 7 through the inlet line 13, the liquid or gas-liquid mixture is buffered through the elbow pipe 15 and the gasket plate 9, the flow rate of the liquid or gas-liquid mixture is reduced, then the liquid or gas-liquid mixture passes through the buffer plate 10, the evaporation area of the gas-liquid mixture is increased, then when the liquid or gas-liquid mixture at the upper end drops on the umbrella plate 11, the liquid drops are broken, the gas in the liquid drops is separated, meanwhile the volume of the liquid drops is reduced, finally the liquid drops further reduce the flow rate and increase the evaporation area of the gas-liquid mixture through the liquid discharge plate 12, the gas-liquid separation is carried out again, through multi-stage separation, the gas part is separated efficiently;

[0025] Meanwhile, the gas part enters the gas discharge line 16 through the multi-stage gas discharge of the gas discharge pipe 25, then flows to the oil gas recovery device, the liquid part flows into the bottom of the separation tank 7, then flows to the storage tank through the outlet line 4 and the liquid inlet line 2;

[0026] When the liquid level of the separation tank 7 reaches the set high liquid level (higher than the lower end of the gas discharge pipe 25), the interlock valve 14 is closed to prevent the liquid phase from flowing to the gas discharge line 16, when the liquid level of the separation tank 7 reaches the set low liquid level (lower than the lower end of the outlet line 4), the interlock valve 14 is closed to prevent the gas phase from flowing to the outlet line 4, then entering the storage tank 1, when the low liquid level setting value is reached, it means that the liquid phase has been completely purged, at this time, the outlet valve 5, the inlet valve 23 and the gas phase line valve 17 are closed, then the first condensate discharge valve 18 and the second condensate discharge valve 20 are opened, the residual liquid in the separation tank 7 is discharged through the observation mirror 19.

[0027] The above is only a preferred embodiment of the present application, any skilled person in the art, without departing from the technical scheme of the present application, according to the technical essence of the present application, any simple modification, equivalent change and modification of the above embodiment, still belongs to the range of the technical scheme of the present application.

Claims

1. A flammable liquid purge buffer tank characterized by: The utility model relates to a kind of oil-water separation devices, including storage tank (1), separation tank (7), import line (13), outlet line (4) and exhaust line (16), the lower portion of storage tank (1) is equipped with liquid inlet line (2);Import line (13) one end is communicated with the upper portion of separation tank (7), and the other end is communicated with oil pipeline, outlet line (4) one end is communicated with the lower portion of separation tank (7), and the other end is communicated with liquid inlet line (2), exhaust line (16) is communicated with the top of separation tank (7);Separation tank (7) is equipped with from top to bottom in sequence vertically arranged backing plate (9), obliquely downward arranged buffer plate (10), hole umbrella plate (11) and the liquid discharge plate (12) with the liquid discharge port in middle portion, separation tank (7) is equipped with exhaust pipe (25), exhaust pipe (25) upper end is communicated with exhaust line (16) by gas outlet pipe (24), and lower end sequentially passes through backing plate (10), umbrella plate (11), and exhaust pipe (25) is equipped with with several groups of exhaust hole (27) corresponding with backing plate (10), umbrella plate (11), liquid discharge plate (12) respectively on it.

2. A combustible liquid purge break tank according to claim 1, wherein: Import line (13) is equipped with inlet valve (23), interlocking valve (14) in sequence on the flow direction of liquid, and separation tank (7) is equipped with liquid level gauge (8) interlocked with interlocking valve (14).

3. A combustible liquid purge break tank as defined in claim 1, wherein: Exhaust line (16) is equipped with gas phase line valve (17).

4. A combustible liquid purge break tank as defined in claim 1, wherein: The bottom of separation tank (7) is communicated with condensate discharge line (21), and condensate discharge line (21) is equipped with first condensate discharge valve (18), sight glass (19), second condensate discharge valve (20) in sequence on the flow direction of liquid.

5. A combustible liquid purge buffer tank as defined in claim 1, wherein: Outlet line (4) is equipped with separation tank outlet valve (5), check valve (22) in sequence on the flow direction of liquid.

6. A combustible liquid purge break tank as defined in claim 1, wherein: Liquid inlet line (2) is equipped with tank root valve (3) near one end of storage tank (1), and the other end is equipped with operating valve (6).

7. A combustible liquid purge break tank as defined in claim 1, wherein: The outlet end of import line (13) is inserted into separation tank (7), and the end portion is equipped with elbow pipe (15), and the outlet end of elbow pipe (15) is opposite backing plate (9).

8. A combustible liquid purge break tank as defined in claim 1, wherein: Exhaust pipe (25) is equipped with cover plate (26), and cover plate (26) is arranged at exhaust hole (27) corresponding with umbrella plate (11) and liquid discharge plate (12).

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