CN215109383U

CN215109383U - Anti-serial pressure device of reciprocating compressor unit

Info

Publication number: CN215109383U
Application number: CN202120224565.3U
Authority: CN
Inventors: 杨磊; 李立
Original assignee: Luoyang Hongxing Xinneng Chemical Co Ltd
Current assignee: Luoyang Hongxing Xinneng Chemical Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-12-10
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a reciprocating compressor set anti-series pressure device, which comprises a first-stage liquid separating tank, a second-stage liquid separating tank and a third-stage liquid separating tank, wherein the inlet of the first-stage liquid separating tank is connected with a hydrogen pipe network, the hydrogen pipe network supplies hydrogen through a hydrogen supply unit and a PSA unit, a first cylinder and a first outlet water cooler are arranged between the first-stage liquid separating tank and the second-stage liquid separating tank, a second cylinder and a second outlet water cooler are arranged between the second-stage liquid separating tank and the third-stage liquid separating tank, the outlet end of the third-stage liquid separating tank is provided with a third cylinder, the outlet end of the third cylinder is connected with a reaction system, the reciprocating compressor set anti-series pressure device provides safety guarantee for preventing high-pressure series, meanwhile, the emergency treatment equipment under the condition of sudden shutdown of the unit is simplified, and the possibility of back stringing from the high pressure of the outlet of the compressor, stringing from the high pressure of the interstage to the low pressure interstage, and stringing from the supercharging section to the inlet of the compressor is greatly reduced.

Description

Anti-serial pressure device of reciprocating compressor unit

Technical Field

The utility model relates to a reciprocating compressor technical field specifically is a reciprocating compressor group prevents pressure equipment and puts.

Background

With the continuous upgrading of the quality of national standard product oil, the processing conditions of the oil refining device are more and more strict. Hydrogenation devices such as hydrocracking and diesel hydrogenation are used as main flow devices for oil upgrading, and one of the characteristics is that a reaction system is in a high-pressure environment. The setting of a high-pressure system brings great pressure crosstalk risk to the device, in the hydrogenation device, a hydrogen reciprocating compressor is used as pressurizing equipment in the reaction system, pressure equipment such as buffer tanks, liquid separating tanks and interstage coolers at all levels are matched, the pipeline pressure grades are different among all levels, and if a unit is abnormally stopped in the pressurizing process, high-pressure back crosstalk in the reaction system can be possibly caused to cause overpressure of the equipment and the pipeline.

The current design for the risk of high-low pressure crosstalk here is generally as follows: firstly, rely on compressor and reaction system tie point to set up the check valve, secondly rely on between each grade to divide the fluid reservoir to set up two kinds of means prevention of relief valve, but there is the trouble during the valve, especially the stage of starting work, and all valves experience the design operating mode for the first time, have all kinds of reasons to lead to becoming invalid, and the security problem that string pressure, superpressure were brought still can not obtain the guarantee.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome current defect, provide a reciprocating compressor group and prevent string pressure equipment device, provide the safety guarantee for preventing that the high pressure cluster from going into, simultaneously, simplified the emergency treatment equipment under the unit proruption shut down condition, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a pressure serial prevention device for a reciprocating compressor set comprises a first-stage liquid separation tank, a second-stage liquid separation tank and a third-stage liquid separation tank, wherein the inlet of the first-stage liquid separation tank is connected with a hydrogen pipe network, the hydrogen pipe network supplies hydrogen through a hydrogen supply unit and a PSA unit, a first air cylinder and a first outlet water cooler are arranged between the first-stage liquid separation tank and the second-stage liquid separation tank, a second air cylinder and a second outlet water cooler are arranged between the second-stage liquid separation tank and the third-stage liquid separation tank, a third air cylinder is arranged at the outlet end of the third-stage liquid separation tank, the outlet end of the third air cylinder is connected with a reaction system, the top of the second-stage liquid separation tank is connected with the inlet end of the first-stage liquid separation tank through a first loop pipe, a first regulating valve is arranged on the first loop pipe, the top of the third-stage liquid separation tank is connected with the inlet end of the second-stage liquid separation tank through a second loop pipe, a second regulating valve is arranged on the second loop pipe, the outlet end of the third air cylinder is connected with the inlet end of the third-stage liquid separation tank through a third loop pipe, and a third regulating valve is arranged on the third loop pipe.

As an optimal technical scheme of the utility model, the entrance of one-stage liquid separation tank is provided with high-pressure unloading system, is provided with high-pressure unloading governing valve on the high-pressure unloading system, and the outer end of high-pressure unloading governing valve is provided with compressor entry teletransmission manometer.

As an optimal technical scheme of the utility model, compressor export check valve and compressor export hand valve have set gradually between third cylinder and the reaction system, are provided with tertiary export teletransmission manometer between compressor export check valve and the third cylinder.

As an optimal technical scheme of the utility model, be provided with air intake valve and exhaust valve on first cylinder, second cylinder and the third cylinder respectively.

As an optimized technical scheme of the utility model, the top of first fraction liquid jar, second fraction liquid jar and third fraction liquid jar is provided with first relief valve, second relief valve and third relief valve respectively.

As an optimal technical scheme of the utility model, the exit end of a branch fluid reservoir, two branch fluid reservoirs and three branch fluid reservoirs is provided with one-level minute fluid reservoir teletransmission manometer, second grade minute fluid reservoir teletransmission manometer and three branch fluid reservoir teletransmission manometer respectively.

Compared with the prior art, the beneficial effects of the utility model are that: the pressure-series prevention device of the reciprocating compressor set has compact structure, reasonable design and convenient operation, greatly reduces the possibility of series pressure from the high pressure at the outlet of the compressor, series pressure from the high pressure of an interstage to the low pressure interstage, and series pressure from a pressurizing section to the inlet of the compressor, realizes the interlocking logic of the regulating valves on three loop pipes of the compressor under the condition that the one-way valve at the outlet of the compressor fails, avoids the situation that the high pressure of a reaction system is connected into each interstage tank through a return valve in series when the reciprocating compressor is shut down, builds a second defense line behind the one-way valve, and blocks the failure one-way valve at the position of a three-level return valve and a machine set by arranging the first loop pipe, the second loop pipe, the third loop pipe and the corresponding first regulating valve, the second regulating valve and the third regulating valve when the sudden reciprocating machine is shut down, the high pressure of the reaction system passes through a hand valve at the outlet of the compressor, the reverse inlet of the outlet is blocked by the exhaust valve of each stage of cylinder, thus avoiding the cascade pressure of the third-stage outlet to the third-stage inlet liquid separation tank, the second-stage outlet to the second-stage inlet liquid separation tank and the first-stage outlet to the first-stage inlet liquid separation tank; after three governing valve closed entirely, main superpressure point has concentrated the compressor entry, by the manual atmospheric valve that opens of operating personnel, adjusts hydrogen pipe network pressure to normal value, and interstage pressure passes through the bypass the utility model discloses logic properly opens the return valve and is put by the entry atmospheric valve, finally keeps level with the hydrogen pipe network, through simple quick processing, has both accomplished and has blocked effectively, has simplified manual operation again, simultaneously, has avoided operating personnel's intervention in the on-the-spot cluster pressure risk, has indirectly protected personal safety.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1 hydrogen supply unit, 2PSA unit, 3 hydrogen pipe network, 4 high pressure emptying system, 5 first-stage liquid separating tank remote transmission pressure gauge, 6 first regulating valve, 7 first safety valve, 8 first cylinder, 9 first outlet water cooler, 10 second-stage liquid separating tank remote transmission pressure gauge, 11 second safety valve, 12 second regulating valve, 13 second cylinder, 14 second outlet water cooler, 15 third-stage liquid separating tank remote transmission pressure gauge, 16 third safety valve, 17 third regulating valve, 18 third cylinder, 19 third-stage outlet remote transmission pressure gauge, 20 compressor outlet one-way valve, 21 compressor outlet hand valve, 22 first-stage liquid separating tank, 23 second-stage liquid separating tank, 24 third-stage liquid separating tank, 25 high pressure emptying regulating valve, 26 compressor inlet remote transmission pressure gauge, 27 reaction system, 28 first loop pipe, 29 second loop pipe and 30 third loop pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1, the present invention provides a technical solution: a device for preventing series pressure of a reciprocating compressor set comprises a first-stage liquid separating tank 22, a second-stage liquid separating tank 23 and a third-stage liquid separating tank 24, the first-stage liquid separating tank 22, the second-stage liquid separating tank 23 and the third-stage liquid separating tank 24 are arranged to play a role in preventing liquid from being carried in a gas phase, the design pressures of the first-stage liquid separating tank 22, the second-stage liquid separating tank 23 and the third-stage liquid separating tank 24 are respectively 2.86MPa, 6.4MPa and 12.5MPa, the setting pressures of a first safety valve 7, a second safety valve 11 and a third safety valve 16 are respectively 2.86MPa, 5.8MPa and 11.5MPa, the tops of the first-stage liquid separating tank 22, the second-stage liquid separating tank 23 and the third-stage liquid separating tank 24 are respectively provided with a first safety valve 7, a second safety valve 11 and a third safety valve 16, the arrangement of the first safety valve 7, the second safety valve 11 and the third safety valve 16 plays a role in preventing overpressure of the compressor set equipment, the outlet ends of the first-stage liquid separating tank 22, the second-stage liquid separating tank 23 and the third-stage liquid separating tank 24 are respectively provided with a first-stage liquid separating tank 5, a first-stage long-distance-pass pressure gauge 5, The device comprises a secondary liquid separating tank remote transmission pressure gauge 10 and a tertiary liquid separating tank remote transmission pressure gauge 15, wherein the primary liquid separating tank remote transmission pressure gauge 5, the secondary liquid separating tank remote transmission pressure gauge 10 and the tertiary liquid separating tank remote transmission pressure gauge 15 are arranged for monitoring the overpressure condition of each stage of equipment, the inlet of a primary liquid separating tank 22 is connected with a hydrogen pipe network 3, the hydrogen pipe network 3 supplies hydrogen through a hydrogen supply unit 1 and a PSA unit 2, a high-pressure emptying system 4 is arranged at the inlet of the primary liquid separating tank 22, a high-pressure emptying regulating valve 25 is arranged on the high-pressure emptying system 4, a compressor inlet remote transmission pressure gauge 26 is arranged at the outer end of the high-pressure emptying regulating valve 25, the compressor inlet remote transmission pressure gauge 26 is arranged for monitoring the overpressure condition of the hydrogen pipe network 3, the high-pressure emptying system 4 plays a role in stabilizing the pressure of the hydrogen pipe network 3, a first air cylinder 8 and a first outlet water cooler 9 are arranged between the primary liquid separating tank 22 and the secondary liquid separating tank 23, a second air cylinder 13 and a second outlet water cooler 14 are arranged between the second-stage liquid separating tank 23 and the third-stage liquid separating tank 24, the arrangement of the first outlet water cooler 9 and the second outlet water cooler 14 plays a role in reducing exhaust temperature, the design pressures of the first outlet water cooler 9 and the second outlet water cooler 14 are respectively 6.4MPa and 12.5MPa, the outlet end of the third-stage liquid separating tank 24 is provided with a third air cylinder 18, the outlet end of the third air cylinder 18 is connected with a reaction system 27, a compressor outlet one-way valve 20 and a compressor outlet hand valve 21 are sequentially arranged between the third air cylinder 18 and the reaction system 27, an air inlet valve and an air outlet valve are respectively arranged on the first air cylinder 8, the second air cylinder 13 and the third air cylinder 18, a third-stage outlet remote pressure gauge 19 is arranged between the compressor outlet one-way valve 20 and the third air cylinder 18, and the arrangement of the outlet remote pressure gauge 19 is used for monitoring the condition of outlet pressure, the top of the second-level liquid separation tank 23 is connected with the inlet end of the first-level liquid separation tank 22 through a first loop pipe 28, a first regulating valve 6 is arranged on the first loop pipe 28, the top of the third-level liquid separation tank 24 is connected with the inlet end of the second-level liquid separation tank 23 through a second loop pipe 29, a second regulating valve 12 is arranged on the second loop pipe 29, the outlet end of a third air cylinder 18 is connected with the inlet end of the third-level liquid separation tank 24 through a third loop pipe 30, a third regulating valve 17 is arranged on the third loop pipe 30, and the first regulating valve 6, the second regulating valve 12 and the third regulating valve 17 are arranged to play a role in regulating the inter-level pressure ratio.

When in use: when the burst compressor is stopped, the first regulating valve 6, the second regulating valve 12 and the third regulating valve 17 are closed, the high pressure of the reaction system passes through the compressor outlet hand valve 21, and the failed compressor outlet one-way valve 20 is blocked at the third regulating valve 17; in the unit, the reverse inlet of the outlet is blocked by the exhaust valves of the cylinders at all levels, so that interstage series pressure of a third-level outlet to a third-level liquid separating tank 24, a second-level outlet to a second-level liquid separating tank 23 and a first-level outlet to a first-level liquid separating tank 22 is avoided, after the first regulating valve 6, the second regulating valve 12 and the third regulating valve 17 are closed, main overpressure points are concentrated at the inlet of the compressor, the high-pressure emptying regulating valve 25 is manually opened by an operator to regulate the pressure of the hydrogen pipe network 3 to a normal value, the interstage pressure is discharged from the inlet high-pressure emptying regulating valve 25 by properly opening the first regulating valve 6, the second regulating valve 12 and the third regulating valve 17, and finally the interstage pressure is kept level with the hydrogen pipe network 3.

The pressure conditions of each serial pressure point are monitored in real time by a remote pressure gauge at the position of each liquid separation tank and at the inlet and outlet of the compressor, if a pressure rising trend is found, a central control worker can manually open the first regulating valve 6, the second regulating valve 12 and the third regulating valve 17 through a DCS configuration interface to reduce the pressure of the outlet of the compressor and the pressure of the first liquid separation tank 22, the second liquid separation tank 23 and the third liquid separation tank 24, and simultaneously, an operator manually opens the high-pressure emptying regulating valve 25 to adjust the pressure of the hydrogen pipe network 3, so that enough reaction time and enough pressure relief space are provided for treating the pressure build-up and overpressure of the PSA unit 2 and the hydrogen supply unit 1 on the way of the hydrogen pipe network 3, and the possible occurrence of serial pressure before starting caused by conditions such as internal leakage of the hand valve 21 at the outlet of the compressor, failure of the one-way valve 20 at the outlet of the compressor and the like is avoided.

Example 2: except dealing with the condition of compressor sudden shutdown, the utility model discloses prevent string pressure equipment device still is applied to the compressor at the start, prevent string pressure processing when switching the unit, in the time of the use, under the not start condition, well accuse personnel give first governing valve 6 on the DCS configuration interface, second governing valve 12 and the each 100% valve position signal of third governing valve 17, this device does not act, after starting the compressor, prevent string pressure equipment device and begin the function, first governing valve 6, second governing valve 12 and third governing valve 17 are opened entirely, the string pressure before starting that the condition such as hourglass and compressor export check valve 20 inefficacy arouse in having avoided compressor export hand valve 21 that probably appears, switching process for the unit provides the safety guarantee.

The utility model discloses the export hand valve that has avoided probably appearing leaks in and opens the machine that the condition such as check valve became invalid and arouse before the cluster presses and takes place, provides the safety guarantee for the switching process of unit, has improved the compressor simultaneously and has shut down, opened the security of machine.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a reciprocating compressor group prevents pressure equipment from running in tandem which characterized in that: comprises a first liquid separating tank (22), a second liquid separating tank (23) and a third liquid separating tank (24), wherein the inlet of the first liquid separating tank (22) is connected with a hydrogen pipe network (3), the hydrogen pipe network (3) supplies hydrogen through a hydrogen supply unit (1) and a PSA unit (2), a first air cylinder (8) and a first outlet water cooler (9) are arranged between the first liquid separating tank (22) and the second liquid separating tank (23), a second air cylinder (13) and a second outlet water cooler (14) are arranged between the second liquid separating tank (23) and the third liquid separating tank (24), a third air cylinder (18) is arranged at the outlet end of the third liquid separating tank (24), the outlet end of the third air cylinder (18) is connected with a reaction system (27), the top of the second liquid separating tank (23) is connected with the inlet end of the first liquid separating tank (22) through a first loop pipe (28), and a first regulating valve (6) is arranged on the first loop pipe (28), the top of the third liquid separating tank (24) is connected with the inlet end of the second liquid separating tank (23) through a second loop pipe (29), a second regulating valve (12) is arranged on the second loop pipe (29), the outlet end of the third air cylinder (18) is connected with the inlet end of the third liquid separating tank (24) through a third loop pipe (30), and a third regulating valve (17) is arranged on the third loop pipe (30).

2. The apparatus for preventing a pressure cross-over of a reciprocating compressor set as set forth in claim 1, wherein: the inlet of the first liquid separation tank (22) is provided with a high-pressure emptying system (4), the high-pressure emptying system (4) is provided with a high-pressure emptying regulating valve (25), and the outer end of the high-pressure emptying regulating valve (25) is provided with a compressor inlet remote transmission pressure gauge (26).

3. The apparatus for preventing a pressure cross-over of a reciprocating compressor set as set forth in claim 1, wherein: a compressor outlet one-way valve (20) and a compressor outlet hand valve (21) are sequentially arranged between the third cylinder (18) and the reaction system (27), and a three-level outlet remote transmission pressure gauge (19) is arranged between the compressor outlet one-way valve (20) and the third cylinder (18).

4. The apparatus for preventing a pressure cross-over of a reciprocating compressor set as set forth in claim 1, wherein: and an air inlet valve and an air outlet valve are respectively arranged on the first cylinder (8), the second cylinder (13) and the third cylinder (18).

5. The apparatus for preventing a pressure cross-over of a reciprocating compressor set as set forth in claim 1, wherein: the top parts of the first-stage liquid separating tank (22), the second-stage liquid separating tank (23) and the third-stage liquid separating tank (24) are respectively provided with a first safety valve (7), a second safety valve (11) and a third safety valve (16).

6. The apparatus for preventing a pressure cross-over of a reciprocating compressor set as set forth in claim 1, wherein: the outlet ends of the first-stage liquid separating tank (22), the second-stage liquid separating tank (23) and the third-stage liquid separating tank (24) are respectively provided with a first-stage liquid separating tank remote transmission pressure gauge (5), a second-stage liquid separating tank remote transmission pressure gauge (10) and a third-stage liquid separating tank remote transmission pressure gauge (15).