CN214173028U

CN214173028U - Process fluid cooling device

Info

Publication number: CN214173028U
Application number: CN202022594851.7U
Authority: CN
Inventors: 范旺农; 史书彬; 周从文; 姜成旭; 李钢; 李强; 张志成
Original assignee: Liaoning Datang Power Fuxin Coal To Gas Co ltd
Current assignee: Liaoning Datang Power Fuxin Coal To Gas Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-09-10
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a technology fluid cooling device, it includes: the system comprises a circulating water upper water pipeline communicated with a desalted water upper water pipeline, and a circulating water upper water first valve, a circulating water upper water 8-shaped blind plate and a circulating water upper water second valve which are sequentially arranged on the circulating water upper water pipeline along the direction of the material flow of the circulating water upper water, wherein the circulating water upper water pipeline is communicated with the desalted water upper water pipeline at the downstream of the desalted water upper water valve; the circulating water return pipeline is communicated with the demineralized water return pipeline, and the circulating water return first valve, the circulating water return 8-shaped blind plate and the circulating water return second valve are sequentially arranged on the circulating water return pipeline along the direction of the logistics of the circulating water return, wherein the circulating water return pipeline is communicated with the demineralized water return pipeline at the upstream of the demineralized water return valve. The utility model discloses a technology fluid cooling device is fit for using in synthetic SNG device catalyst intensification, reduction and normal production process, and adjusts nimble, energy saving and consumption reduction.

Description

Process fluid cooling device

Technical Field

The utility model belongs to the chemical industry field. Specifically, the utility model relates to a process fluid cooling device.

Background

Natural gas is a clean fuel with high efficiency and high quality. In recent years, the natural gas consumption in China is rapidly increased. In 2019, the natural gas yield in China reaches 1736 billions per cubic meter, and the amplification reaches 9.8%. In 2019, the annual consumption of natural gas in China is 3040 billion cubic meters, and the year-round growth is 9.6 percent. The optimization of energy structure and the environmental pollution control at the national level become the most main driving force for natural gas consumption.

The Synthetic Natural Gas (SNG) made from coal is based on the characteristics of natural resources in China. Through the high-efficient conversion of coal, produce clean energy product to deliver to the target market of each city gas with the help of the pipeline. Natural gas has great market advantages. The technology for preparing the synthetic natural gas from the coal is relatively mature, the energy conversion efficiency is high, the unit heat value water consumption is low, and the method is one of the most important development directions of novel coal chemical industry. The advantage of relatively rich coal resources is utilized, the industry of preparing synthetic natural gas from coal is developed moderately, and clean utilization of coal in China is facilitated.

The coal-based synthetic natural gas is a process technology for producing natural gas by taking coal as a raw material, and the core technology of a process route is a methanation technology. The major methanation technologies are developed in foreign countries, and mainly include lurgi company in germany, thomson company in denmark, Davy company in uk, and huge energy company in the united states.

Because the technology of producing synthetic natural gas by coal in China is not mature enough, the current synthetic natural gas technology mostly adopts methanation process (HICOM process) of Davy company in England or methanation process (TREMP process) of Topsoe company in Denmark.

The process gas in the above mentioned british HICOM process needs to be cooled to around 154 ℃ by a shell and tube heat exchanger before entering the compressor. The cooling medium in the shell-and-tube heat exchanger is expensive and high-pressure demineralized water. The utility model discloses people discover, at the initial stage of driving of coal system synthetic gas, because whole process system does not really operate, cause no reaction heat production among the process system, and then can't make the demineralized water after the heat transfer become medium pressure steam in the medium pressure boiler through the reaction heat of system. That is, at the initial stage of the start-up of the coal-based synthesis gas, the desalted water after heat exchange cannot be reused, and only the excess desalted water exceeding the capacity of the deaerating tank for storing the desalted water is discharged to the rainwater drainage system, resulting in a large amount of waste of desalted water.

Therefore, an efficient and energy-saving device capable of cooling the process gas of the coal-to-synthesis gas is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a technology fluid cooling device. The device has strong operability, saves the using amount of the demineralized water and has high energy utilization rate.

The above object of the present invention is achieved by the following technical means.

The utility model provides a technology fluid cooling device, it includes: the system comprises a shell-and-tube heat exchanger, a desalted water inlet pipeline communicated with the lower inlet end of the shell pass of the shell-and-tube heat exchanger, a desalted water inlet valve arranged on the desalted water inlet pipeline, a desalted water return pipeline communicated with the upper outlet end of the shell pass of the shell-and-tube heat exchanger, a desalted water return valve arranged on the desalted water return pipeline, a process fluid inlet pipeline communicated with the inlet end of the shell-and-tube heat exchanger, an inlet temperature regulating valve arranged on the process fluid inlet pipeline, and a process fluid outlet pipeline communicated with the rear outlet end of the shell-and-tube heat exchanger; characterized in that the process fluid cooling device further comprises:

the system comprises a circulating water upper water pipeline communicated with the desalted water upper water pipeline, and a circulating water upper water first valve, a circulating water upper water 8-shaped blind plate and a circulating water upper water second valve which are sequentially arranged on the circulating water upper water pipeline along the direction of the material flow of the circulating water upper water, wherein the circulating water upper water pipeline is communicated with the desalted water upper water pipeline at the downstream of the desalted water upper water valve;

the circulating water return pipeline is communicated with the desalted water return pipeline, and a first circulating water return valve, a 8-shaped circulating water return blind plate and a second circulating water return valve are sequentially arranged on the circulating water return pipeline along the direction of the material flow of the circulating water return, wherein the circulating water return pipeline is communicated with the desalted water return pipeline at the upstream of the desalted water return valve;

and the emptying pipeline is communicated with the highest position of the desalted water return pipeline, and the emptying valve is arranged on the emptying pipeline.

Preferably, in the process fluid cooling device of the present invention, the first valve for circulating upper water, the second valve for circulating upper water, the first valve for circulating return water and the second valve for circulating return water are each independently selected from a butterfly valve, a gate valve or a stop valve.

Preferably, in the process fluid cooling device of the present invention, the device further comprises at least one circulating top water check valve disposed between the circulating top water 8-shaped blind plate and the circulating top water second valve.

Preferably, in the process fluid cooling device of the present invention, the device further comprises at least one circulating backwater check valve disposed between the circulating backwater 8-shaped blind plate and the second circulating backwater valve.

Preferably, in the process fluid cooling device of the present invention, the device further comprises a bypass line communicating the process fluid outlet line with the process fluid inlet line, and a bypass temperature regulating valve provided on the bypass line.

Preferably, in the process fluid cooling device of the present invention, the device further comprises a blasting pipeline communicated with the top of the shell side of the shell-and-tube heat exchanger, a rupture disk arranged on the blasting pipeline, and a rupture disk root cut-off valve located upstream of the rupture disk.

Preferably, in the process fluid cooling device of the present invention, the device further includes a desalted water supply lead shower line connected to the lowest position of the desalted water supply line, a desalted water supply lead shower valve disposed on the desalted water supply lead shower line, a circulating water supply lead shower line connected to the lowest position of the circulating water supply lead shower line, and a circulating water supply lead shower valve disposed on the circulating water supply lead shower line.

Preferably, in the process fluid cooling device of the present invention, the saltwater overflow valve includes a saltwater overflow first valve, a saltwater overflow 8-shaped blind plate, a saltwater overflow stop valve, and a saltwater overflow second valve, which are sequentially arranged along a material flow direction of the saltwater overflow.

Preferably, in the process fluid cooling device of the present invention, the saltwater top water first valve and the saltwater top water second valve are each independently selected from a butterfly valve, a gate valve or a stop valve.

Preferably, in the process fluid cooling device of the present invention, the demineralized water return valve includes a demineralized water return flow regulating valve front cut-off valve, a demineralized water return flow regulating valve, and a demineralized water return flow regulating valve rear cut-off valve, which are sequentially arranged along the flow direction of the demineralized water return; the device also comprises a demineralized water return flow meter arranged on the downstream of the back cut-off valve of the demineralized water return flow regulating valve; and the demineralized water return flow regulating valve is connected with the demineralized water return flow meter.

Preferably, in the process fluid cooling device of the present invention, the desalted water return flow regulating valve front shut-off valve and the desalted water return flow regulating valve rear shut-off valve are each independently selected from a butterfly valve, a gate valve or a shut-off valve.

Preferably, in the process fluid cooling device of the present invention, the device further comprises at least one demineralized water return valve disposed upstream of the demineralized water return flow regulating valve front shut-off valve; the demineralized water return valve is selected from a butterfly valve, a gate valve or a stop valve.

In the process fluid cooling device of the present invention, the shell-and-tube heat exchanger is not particularly limited, and may be a shell-and-tube heat exchanger that is conventional in the art. The shell-and-tube heat exchanger can be a BEM type horizontal structure and comprises a cylinder body, a tube plate, a heat exchange tube and an elliptical seal head. The utility model discloses an among the concrete embodiment, the total length of shell and tube heat exchanger barrel and left and right sides both ends flange is 7474mm, and the heat exchange tube is 562 straight tubes, and the size is phi 25 x 2, and the heat transfer area of shell and tube heat exchanger is 323.52m². A shell and tube heat exchanger is a device used in a SNG synthesis system to control the cooling of process gas before it enters the recycle gas compressor. Units of dimensions such as Φ and DN, not labeled herein, are typically in mm in the art.

In a specific embodiment of the utility model, the shell pass of the shell-and-tube heat exchanger is provided with a lower inlet end, and the pipe diameter is DN 250; the medium in the pipe at the lower inlet end of the shell side is desalted water or circulating water, the temperature is 28 ℃, and the pressure is 1.3MPa or 0.45 MPa.

In a specific embodiment of the utility model, the shell pass of the shell-and-tube heat exchanger is provided with an upper outlet end, and the pipe diameter is DN 250; the medium in the pipe at the upper outlet end of the shell side is desalted water or circulating water, the temperature is 150 ℃, and the pressure is 1.15MPa or 0.25 MPa.

The utility model discloses an among the concrete embodiment, the tube side of shell and tube heat exchanger is provided with the advancing end, and its pipe diameter is DN 500. The medium in the pipe at the advancing end of the pipe pass is the process gas from the coal-based synthetic natural gas. The tube pass is provided with a rear outlet end, and the tube diameter of the tube pass is DN 500. The medium in the pipe at the rear outlet end of the pipe pass is cooled process gas from coal-based synthetic natural gas.

In a specific embodiment of the present invention, the shell side of the shell-and-tube heat exchanger is made of S30408; the material of the heat exchange tube of the tube pass of the shell-and-tube heat exchanger is 0Cr18Ni 9.

In a specific embodiment of the present invention, the burst pressure of the rupture disk disposed on the burst line is 1.6 MPa. The top of the shell layer of the shell-and-tube heat exchanger is provided with the rupture disk, and desalted water is discharged in time after overpressure, so that the equipment is protected from being damaged, and the safety coefficient is higher.

The utility model discloses an in the device, the atmospheric valve mainly is arranged in the air of unloading demineralized water return line, guarantees the security of system. The demineralized water upper water guiding and spraying valve and the circulating water upper water guiding and spraying valve are mainly used for putting the demineralized water in the demineralized water upper water pipeline and the circulating water in the circulating water upper water pipeline completely, so that demineralized water and circulating water are prevented from being stored in the pipelines, and the safety of the system is guaranteed.

The utility model discloses an in the device, set up the first valve of circulating water upper water, 8 word blind plates of circulating water upper water, the second way valve of circulating water upper water, the first valve of circulating water return water, 8 word blind plates of circulating water return water and circulating water return water second way valve are in order to guarantee that demineralized water and circulating water switch operation in-process and demineralized water normally throw the time of usefulness, and demineralized water can not cluster in the circulating water.

The utility model discloses an in the device, set up demineralized water return flow control valve, both guaranteed the needs of the process gas's of cooling in-process gas outlet pipeline temperature, can also monitor the quantity of demineralized water.

The utility model discloses an among the device, the process gas's that can control process gas outlet line temperature through adjustment entry temperature regulating valve and bypass temperature regulating valve is about 154 ℃. The process gas is brought to about 154 ℃ before entering the subsequent compressor.

The utility model discloses following beneficial effect has:

(1) and 4, the desalted water is saved. In order to avoid the waste of the discharged desalted water, a circulating water upper water and a circulating water return pipeline are additionally arranged, the circulating water is used for replacing the desalted water for heat exchange, and a large amount of expensive and high-pressure desalted water can be saved.

(2) The burden of sewage treatment is reduced. The discharge of a large amount of demineralized water exceeding the storage capacity of the deaerator tank to the rain drainage system increases the sewage treatment capacity. The circulating water pipeline is additionally arranged, so that the demineralized water is prevented from being discharged to a sewage system, and the burden of sewage treatment is reduced.

(3) The power saving effect is remarkable. The desalted water used by the shell-and-tube heat exchanger is refined from condensate, and the desalted water pump does not need to supply desalted water to the desalted water during the period that the shell-and-tube heat exchanger is put into use with circulating water, so that the electricity-saving effect is remarkable.

Drawings

Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic diagram of a process gas cooling apparatus according to an embodiment of the present invention;

wherein, the reference numbers:

1-shell-and-tube heat exchanger; 2-circulating water cross-line pipeline; 3-lower inlet end of shell side; 4-the upper outlet end of the shell side; 5-inlet temperature regulating valve; 6-bypass temperature regulating valve; 7-the forward end of the tube side; 8-rear outlet end of tube pass; 9-rupture disk; 10-a rupture disk root cut-off valve; 11-circulating the water first butterfly valve; 12-a second butterfly valve for circulating the water on the water; 13-8-shaped blind plates for circulating the water above the water surface; 14-a first gate valve for the brine removal water; 15-a second gate valve for removing the brine water; 16-a saltwater removal water stop valve; 17-8-shaped blind plates for the desalted water and the brine; 18-circulating water returns to the first butterfly valve; 19-circulating water returns to the second butterfly valve; 20-circulating water backwater 8-shaped blind plate; 21-a circulating water cross-line stop valve; 22-a demineralized water return stop valve; 23-a demineralized water return gate valve; 24-a demineralized water return flow regulating valve; 25-cutting off a gate valve in front of the demineralized water return flow regulating valve; 26-cutting off the gate valve after the demineralized water return flow regulating valve; 27-a demineralized water backwater flow meter; 28-a bypass line; 29-a demineralized water return line; 30-process gas inlet line; 31-circulating water upper line; 32-desalted water upper line; 33-process gas outlet line; 34-a circulating water return line; 35-circulating water check valve; 36-a blow-down line; 37-a blow-down valve; 38-circulating water upper water guiding and sprinkling pipeline; 39-circulating water upper water guide shower valve; 40-a desalted water upper water guide and sprinkling pipeline; 41-guiding and spraying valve for the upper water of the desalted water; 42-blasting the pipeline; 43-circulating water backwater check valve.

Detailed Description

The invention is further illustrated by the following specific examples, but it should be understood that these examples are for illustrative purposes only and are not to be construed as limiting the invention in any way.

Referring to fig. 1, the present invention provides a process fluid cooling apparatus. In this plant, the process fluid is a process gas from coal-to-synthetic natural gas. The process gas cooling apparatus includes: the system comprises a shell-and-tube heat exchanger 1, a desalted water inlet pipeline 32 communicated with a lower inlet end 3 of a shell pass of the shell-and-tube heat exchanger 1, a desalted water inlet valve arranged on the desalted water inlet pipeline 32, a desalted water return pipeline 29 communicated with an upper outlet end 4 of the shell pass of the shell-and-tube heat exchanger 1, a desalted water return valve arranged on the desalted water return pipeline 29, a process gas inlet pipeline 30 communicated with an inlet end 7 of the shell-and-tube heat exchanger 1 and coming from coal-made synthetic natural gas, an inlet temperature regulating valve 5 arranged on the process gas inlet pipeline 30, and a process gas outlet pipeline 33 communicated with a rear outlet end 8 of the shell-and-tube heat exchanger 1; it still includes:

a circulating water upper water pipeline 31 communicated with the desalted water upper water pipeline 32, and a circulating water upper water first valve such as a circulating water upper water first butterfly valve 11, a circulating water upper water 8-shaped blind plate 13 and a circulating water upper water second valve such as a circulating water upper water second butterfly valve 12 which are sequentially arranged on the circulating water upper water pipeline 31 along the direction of the material flow of the circulating water upper water, wherein the circulating water upper water pipeline 31 is communicated with the desalted water upper water pipeline 32 at the downstream of the desalted water upper water valve; a circulating water return pipeline 34 communicated with the desalted water return pipeline 29 and a circulating water return first valve such as a circulating water return first butterfly valve 18, a circulating water return 8-shaped blind plate 20 and a circulating water return second valve such as a circulating water return second butterfly valve 19 which are sequentially arranged on the circulating water return pipeline 34 along the direction of the logistics of the circulating water return, wherein the circulating water return pipeline 32 is communicated with the desalted water return pipeline 29 at the upstream of the desalted water return valve; a vent line 36 communicated with the highest position of the desalted water return line 29 and a vent valve 37 provided on the vent line 36. Highest refers to the highest position relative to the ground.

In the utility model discloses a process gas cooling device, preferably, the device still includes and sets up at least one circulation water non return valve 35 between circulation water upper water 8 word blind 13 and circulation water upper water second valve say butterfly valve 12 for circulation water upper water second.

In the utility model discloses a process gas cooling device, preferably, the device is still including setting up in at least one circulating water return check valve 43 between circulating water return 8 word blind slabs 20 and circulating water return second valve say butterfly valve 18 like circulating water return second.

In the process gas cooling device of the present invention, preferably, the device further comprises a bypass line 28 communicating the process gas outlet line 33 with the process gas inlet line 30, and a bypass temperature regulating valve 6 provided on the bypass line 28.

In the utility model discloses a process gas cooling device, preferably, the device still includes the blasting pipeline 42 and the rupture disk 9 of setting on blasting pipeline 42 and the rupture disk root trip valve 10 that is located rupture disk 9 upstream that are linked together with the shell side top of shell and tube type heat exchanger 1.

In the process gas cooling device of the present invention, preferably, the device further comprises a desalted water upper water guiding and sprinkling pipeline 40 communicated with the lowest position of the desalted water upper water pipeline 32 and a desalted water upper water guiding and sprinkling valve 41 arranged on the desalted water upper water guiding and sprinkling pipeline 40; a circulating water upper water guiding and sprinkling pipeline 38 communicated with the lowest part of the circulating water upper water pipeline 31 and a circulating water upper water guiding and sprinkling valve 39 arranged on the circulating water upper water guiding and sprinkling pipeline 38.

The utility model discloses an among the process gas cooling device, preferably, the water valve door of demineralized water includes the first valve of demineralized water such as the first gate valve of demineralized water 14, the 8 word blind plates of demineralized water 17, the stop valve of demineralized water 16 and the second valve of demineralized water such as the second gate valve of demineralized water 15 along the commodity circulation direction of demineralized water in proper order.

In the process gas cooling device of the present invention, preferably, the demineralized water return valve comprises a demineralized water return flow regulating valve front cut-off valve such as a demineralized water return flow regulating valve front cut-off gate valve 25, a demineralized water return flow regulating valve 24, and a demineralized water return flow regulating valve rear cut-off valve such as a demineralized water return flow regulating valve rear cut-off gate valve 26 in sequence along the demineralized water return direction; the device also comprises a demineralized water return flow meter 27 arranged at the downstream of the demineralized water return flow regulating valve rear cut-off valve 26; the demineralized water return flow regulating valve 24 is connected with a demineralized water return flow meter 27.

The utility model discloses an among the process gas cooling device, preferably, the device is still including setting up at least one such as 2 demineralized water return valves that cut off gate valve 25 upper reaches before demineralized water return flow control valve for example demineralized water return stop valve 22, demineralized water return gate valve 23.

In the process gas cooling device of the present invention, the shell-and-tube heat exchanger is not particularly limited, and may be a shell-and-tube heat exchanger that is conventional in the art. The shell-and-tube heat exchanger can be a BEM type horizontal structure and comprises a cylinder body, a tube plate, a heat exchange tube and an elliptical seal head. The utility model discloses an among the concrete embodiment, the total length of shell and tube heat exchanger barrel and left and right sides both ends flange is 7474mm, and the heat exchange tube is 562 straight tubes, and the size is phi 25 x 2, and the heat transfer area of shell and tube heat exchanger is 323.52m². A shell and tube heat exchanger is a device used in a SNG synthesis system to control the cooling of process gas before it enters the recycle gas compressor. Units of dimensions such as Φ and DN, not labeled herein, are typically in mm in the art.

The utility model discloses an in the device, the atmospheric valve mainly is the steam that is arranged in the blowdown demineralized water return line, guarantees the security of system. The demineralized water upper water guiding and spraying valve and the circulating water upper water guiding and spraying valve are mainly used for putting the demineralized water in the demineralized water upper water pipeline and the circulating water in the circulating water upper water pipeline completely, so that demineralized water and circulating water are prevented from being stored in the pipelines, and the safety of the system is guaranteed.

The process gas cooling device of the utility model comprises the following concrete steps when in use:

operation of putting circulating water into service

1. And confirming that the system is in a start-up temperature rise stage.

2. And (3) confirming the communication of the 8-shaped blind plate 13 for circulating water upper water and the 8-shaped blind plate 20 for circulating water return of the process gas cooling device.

3. It is confirmed that the first gate valve 14 for the saltwater overflow, the stop valve 16 for the saltwater overflow, and the second gate valve 15 for the saltwater overflow on the saltwater overflow line 32 of the process gas cooler are closed.

4. Confirming that the blow-down valve 37, the circulating upper water guiding and spraying valve 39 and the desalted upper water guiding and spraying valve 41 of the process gas cooling device are in a closed state.

5. And (5) confirming that the inlet temperature regulating valve 5 and the bypass temperature regulating valve 6 are qualified in adjustment and use.

6. And closing the rupture disk root cut-off valve 10.

7. The first butterfly valve 11 of the circulating water upper water on the circulating water upper water pipeline 31 of the slow full-open process gas cooling device and the second butterfly valve 12 of the circulating water upper water.

8. The blow-off valve 37 of the process gas cooling device is opened, and the blow-off valve 37 is closed after the exhaust gas meets water.

9. And slowly opening a first circulating water return butterfly valve 18 and a second circulating water return butterfly valve 19 on the circulating water return pipeline 34.

10. And opening a cutting valve 10 at the root of the rupture disk, and putting in use a local pressure gauge.

11. The central control controls the temperature of the process gas outlet line to 154 c by adjusting the inlet temperature regulating valve 5 and the bypass temperature regulating valve 6.

(II) operation of supplying demineralized water

1. Confirming that a circulating water system of the process gas cooling device is in a commissioning state.

2. Confirming that the desalted water valve of the process gas cooling device is in a closed state.

3. Confirming the temperature rise of the reaction system, and the gas production rate of the steam drum is about 40 t/h.

4. And (5) confirming that the adjustment of the demineralized water return flow regulating valve 24 is qualified and putting into service.

5. And confirming that the front cutoff gate valve 25 of the demineralized water return flow regulating valve and the rear cutoff gate valve 26 of the demineralized water return flow regulating valve in front of and behind the demineralized water return flow regulating valve 24 are opened.

6. The adjustment of the desalted water upper water 8-shaped blind plate 17 on the desalted water upper water line 32 of the process gas cooling device is confirmed.

7. Confirming that the blow-down valve 37, the circulating upper water guiding and spraying valve 39 and the desalted upper water guiding and spraying valve 41 of the process gas cooling device are in a closed state.

8. Confirming that the oxygen removing tank system has the receiving condition.

9. And gradually opening a first gate valve 14 for the desalted water overflow, a stop valve 16 for the desalted water overflow and a second gate valve 15 for the desalted water overflow on a desalted water overflow line 32 of the process gas cooling device.

10. Gradually closing a first butterfly valve 11 for circulating water on a circulating water upper water pipeline 31 of the process gas cooling device and a second butterfly valve 12 for circulating water upper water.

11. And the central control gradually opens the return flow regulating valve 24 of the desalted water.

12. And gradually closing the first butterfly valve 18 for circulating water return and the second butterfly valve 19 for circulating water return on the circulating water return pipeline 34 of the process gas cooling device.

13. After the circulating water is completely cut off, the flow is adjusted to 20.52t/h by the central control through the demineralized water return flow adjusting valve 24.

14. The central control controls the temperature of the process gas outlet line to be 154 ℃ by adjusting the inlet temperature regulating valve 5 and the bypass temperature regulating valve 6.

15. It was confirmed that the circulating water of the process gas cooling apparatus was completely cut off.

16. The demineralized water of the process gas cooling unit was confirmed to be fully incorporated.

17. And blind adjustment of the 8-shaped blind plate 13 of the circulating water on the circulating water inlet pipeline 31 of the process gas cooling device and blind adjustment of the 8-shaped blind plate 20 of the circulating water return pipeline 34 are confirmed.

Can find out in above operation step, process gas cooling device be fit for using in synthetic SNG device catalyst intensification, reduction and normal production process, and adjust nimble, energy saving and consumption reduction, the operation is reliable, factor of safety is high, is favorable to popularizing and applying in the industry.

Although the present invention has been described to a certain extent, it is apparent that appropriate changes in various conditions may be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not limited to the described embodiments, but is to be accorded the scope consistent with the claims, including equivalents of each element described.

Claims

1. A process fluid cooling device, comprising: the system comprises a shell-and-tube heat exchanger, a desalted water inlet pipeline communicated with the lower inlet end of the shell pass of the shell-and-tube heat exchanger, a desalted water inlet valve arranged on the desalted water inlet pipeline, a desalted water return pipeline communicated with the upper outlet end of the shell pass of the shell-and-tube heat exchanger, a desalted water return valve arranged on the desalted water return pipeline, a process fluid inlet pipeline communicated with the inlet end of the shell-and-tube heat exchanger, an inlet temperature regulating valve arranged on the process fluid inlet pipeline, and a process fluid outlet pipeline communicated with the rear outlet end of the shell-and-tube heat exchanger; characterized in that the process fluid cooling device further comprises:

2. The process fluid cooling device of claim 1 wherein the first valve for circulating top water, the second valve for circulating top water, the first valve for circulating back water, and the second valve for circulating back water are each independently selected from the group consisting of butterfly valves, gate valves, and stop valves.

3. The process fluid cooling device of claim 1 further comprising at least one circulating top water check valve disposed between the circulating top water 8-blind plate and the circulating top water second valve.

4. The process fluid cooling device according to claim 1, further comprising at least one circulating backwater check valve disposed between the circulating backwater 8-blind plate and the circulating backwater second valve.

5. The process fluid cooling arrangement of claim 1 further comprising a bypass line communicating the process fluid outlet line with the process fluid inlet line and a bypass temperature regulating valve disposed on the bypass line.

6. The process fluid cooling device of claim 1, further comprising a burst line in communication with the shell side top of the shell and tube heat exchanger, and a burst disc disposed on the burst line and a burst disc root shut-off valve upstream of the burst disc.

7. The process fluid cooling device of claim 1 further comprising a desalted water effluent lead line communicating with the lowest of the desalted water effluent lines and a desalted water effluent lead valve disposed on the desalted water effluent lead line, a circulating water effluent lead line communicating with the lowest of the circulating water effluent lines and a circulating water effluent lead valve disposed on the circulating water effluent lead line.

8. The process fluid cooling device of claim 1, wherein the saltwater top valve comprises a saltwater top first valve, a saltwater top 8-shaped blind plate, a saltwater top stop valve and a saltwater top second valve which are arranged in sequence along the logistics direction of the saltwater top.

9. The process fluid cooling arrangement of claim 8 wherein the saltwater top water first valve and the saltwater top water second valve are each independently selected from a butterfly valve, a gate valve, or a stop valve.

10. The process fluid cooling device of claim 1, wherein the demineralized water return valve comprises a demineralized water return flow regulating valve front shut-off valve, a demineralized water return flow regulating valve and a demineralized water return flow regulating valve rear shut-off valve which are arranged in sequence along the logistics direction of the demineralized water return; the device also comprises a demineralized water return flow meter arranged on the downstream of the back cut-off valve of the demineralized water return flow regulating valve; and the demineralized water return flow regulating valve is connected with the demineralized water return flow meter.

11. The process fluid cooling device of claim 10, wherein the demineralized return water flow regulator front shut-off valve and the demineralized return water flow regulator rear shut-off valve are each independently selected from a butterfly valve, a gate valve, or a shut-off valve.

12. The process fluid cooling device of claim 10, further comprising at least one demineralized water return valve disposed upstream of the demineralized water return flow regulating valve front shut-off valve; the demineralized water return valve is selected from a butterfly valve, a gate valve or a stop valve.