CN220394014U

CN220394014U - Heat medium circulation system

Info

Publication number: CN220394014U
Application number: CN202321979963.1U
Authority: CN
Inventors: 张龙; 孔文龙; 王云华; 白万举; 陈跃; 苏尚潘; 李强胜; 战秋生
Original assignee: Jiangsu Ruibang Technology Co ltd
Current assignee: Jiangsu Ruibang Technology Co ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-01-26
Anticipated expiration: 2033-07-26

Abstract

The utility model relates to a heating medium circulation system, which comprises a first circulation assembly and a second circulation assembly, wherein the first circulation assembly is communicated with the second circulation assembly through a first communication pipeline, and a flow dividing valve is arranged on the first communication pipeline; the first circulating assembly is communicated with the first system and comprises a first circulating loop, a first heat medium circulating pump, a first outlet valve, a first isolating valve, a second isolating valve and a first inlet valve; the second circulation assembly is communicated with a second system and comprises a second circulation loop, a second heat medium circulation pump, a second outlet valve, a third block valve, a fourth block valve and a second inlet valve; a second communication pipeline is arranged between the second block valve and the fourth block valve, and a combining valve is arranged on the second communication pipeline. The heat medium circulation system provided by the utility model realizes the control of double-line or multi-line of a single heat medium circulation pump, not only can improve the use efficiency of the heat medium circulation pump, reduce the energy consumption and the control production cost, but also can reduce the use quantity of the heat medium pump.

Description

Heat medium circulation system

Technical Field

The utility model relates to a heating medium circulation system.

Background

In recent years, the development of the regenerated polyester industry in China is rapidly concentrated on Jiangsu, zhejiang, guangdong, fujian and the like, wherein the energy yield of Jiangzhe is more than seventy percent of the total national energy yield, in addition, the secondary pollution emission is well controlled by the current advanced regenerated polyester technology, and the regenerated polyester directly passes through pollution brought by PTA and EG production links, so that the application value is higher. And secondly, the recycling of the polyester bottle has considerable social and economic benefits, the recycled polyester bottle chips are widely applied to the production of non-woven fabrics and polyester staple fibers at present, but the ratio of the recycled polyester bottle chips to filaments is small, and the recycled polyester filaments have larger development space along with the improvement of the process of spinning the filaments by the recycled polyester.

However, the process flow for producing polyester filaments by using the waste polyester bottle chips through the regenerated polyester is carried out by heating, melting, mixing and extruding through a screw extruder, entering into a tackifying reaction kettle through a melt filter, and entering into spinning through a booster pump, so that the production technology is simple, the process flow is shorter, and in order to improve the productivity in the production and manufacture of factories, one set of devices is often designed for multiple threads at the beginning of design. If one line is designed according to normal heat medium heat supply, the four sets of heat medium systems of a melt line system before a kettle, a reaction kettle system, a melt line system after the kettle and a weather heat tracing system are needed, wherein the first problem is that the single line system is smaller, the operation energy consumption of a heat medium pump is larger, the cost is higher, the industrial production building area, the space distance and the use place are limited, and the staggering sense and the equipment positioning place caused by multi-line normal heat medium circulation are more complicated.

Referring to fig. 3, two pumps, namely an a heat medium pump and a B heat medium pump, are provided, one of the a heat medium pump and the B heat medium pump works, the other is standby, and when the a heat medium pump works, the valves 1 'and 2' are opened, and the valves 3 'and 4' are closed. Two pumps correspond to one M system (production system), the pumps provide heat energy for the M system, and cannot correspond to other systems (such as N systems), when the M system has a problem, the whole circuit needs to be closed (the pumps stop working).

Currently, two systems (an M system and an N system) work independently, and in terms of control, the following two problems are mainly encountered in practice:

1. when one line is heated, the on-site primary heating medium hand valve is required to be opened, the opening of the hand valve is not easy to control, when the temperature is in place and the line is in parallel, a fluctuation in the temperature can occur due to the instant increase of a user of the heating medium pump, the general fluctuation can be between 5 and 7 ℃, the time can last for 2 to 3 minutes, the control intervention can be carried out immediately, and the production cannot be influenced.

2. When the double-line operation is performed, the primary heating medium regulating valve is used for central heating, and then flows to the line, the temperature of the reflux to the pump can be slightly changed due to the influences of the productivity, the liquid level and the like of the line, the temperature of the line is different by 1-2 ℃, and the opening of the single-line reflux valve can be adjusted at the moment to manually adjust the temperature without influencing production.

From a daily operation and maintenance aspect, in practice, the following two problems are encountered:

1. if the heat medium pump is jumped and stopped in daily production, two lines are involved in the influence, the problem of starting in a short time is not great, but the temporary starting cannot be realized due to part of reasons, and the two lines are at risk of stopping due to production reduction.

2. The process involves more valves, increases the misoperation probability of a first-line operator, and if the problem of valve core or internal leakage is found in the daily maintenance of the valves, the valves can only be stopped and overhauled by two lines, cannot be isolated independently, and also increases an instability in production.

Disclosure of Invention

The utility model aims to provide a heating medium circulating system which can improve the use efficiency of a heating medium circulating pump, reduce energy consumption, control production cost and reduce the use quantity of the heating medium pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the heat medium circulation system comprises a first circulation assembly and a second circulation assembly, wherein the first circulation assembly is communicated with the second circulation assembly through a first communication pipeline, and a flow dividing valve is arranged on the first communication pipeline; the first circulating assembly is communicated with the first system and comprises a first circulating loop, a first heating medium circulating pump, a first outlet valve, a first isolating valve, a second isolating valve and a first inlet valve, wherein the first heating medium circulating pump, the first outlet valve, the first isolating valve, the second isolating valve and the first inlet valve are arranged on the first circulating loop;

the second circulation assembly is communicated with a second system and comprises a second circulation loop, a second heating medium circulation pump, a second outlet valve, a third isolation valve, a fourth isolation valve and a second inlet valve, wherein the second heating medium circulation pump, the second outlet valve, the third isolation valve, the fourth isolation valve and the second inlet valve are arranged on the second circulation loop; a second communication pipeline is arranged between the second isolating valve and the fourth isolating valve, a combining valve is arranged on the second communication pipeline, and the second communication pipeline is communicated with the first circulation loop and the second circulation loop.

Preferably, the first circulation loop comprises a first pipeline and a second pipeline, one end of the first pipeline is communicated with the first heating medium circulation pump outlet, the other end of the first pipeline is communicated with the first system, and the first outlet valve and the first isolation valve are arranged on the first pipeline; one end of the second pipeline is communicated with the inlet of the first heat medium circulating pump, the other end of the second pipeline is communicated with the first pipeline, and the second isolating valve and the first inlet valve are arranged on the second pipeline.

Preferably, the first outlet valve is closer to the outlet of the first heat medium circulating pump than the first isolating valve.

Preferably, the second circulation loop comprises a third pipeline and a fourth pipeline, one end of the third pipeline is communicated with the outlet of the second heat medium circulation pump, the other end of the third pipeline is communicated with the second system, and the second outlet valve and the third isolation valve are both arranged on the third pipeline; one end of the fourth pipeline is communicated with the inlet of the first heat medium circulating pump, the other end of the fourth pipeline is communicated with the third pipeline, and the fourth isolating valve and the second inlet valve are arranged on the fourth pipeline; the first communication pipeline is communicated with the first pipeline and the third pipeline.

Preferably, the second outlet valve is closer to the outlet of the second heat medium circulating pump than the third isolating valve.

Preferably, the system further comprises a liquid phase assembly, the liquid phase assembly comprises a liquid phase loop, a regulating valve, a first back hand valve and a second back hand valve, the liquid phase loop is provided with an inlet end, a first outlet end and a second outlet end, the inlet end is communicated with a power source, the regulating valve is arranged on a pipeline communicated with the power source, the first circulation loop is communicated with the first outlet end, the second circulation loop is communicated with the second outlet end, the first back hand valve is arranged on a pipeline communicated with the first outlet end and the first circulation loop, and the second back hand valve is arranged on a pipeline communicated with the second outlet end and the second circulation loop.

Preferably, the liquid phase loop comprises a first branch, a second branch and a third branch, one end of the first branch is communicated with a power source, the other end of the first branch is communicated with one end of the second branch, the other end of the second branch is communicated with the first circulation loop, one end of the third branch is communicated with the other end of the first branch, the other end of the third branch is communicated with the first circulation loop, the regulating valve is arranged on the first branch, the first back hand valve is arranged on the second branch, and the second back hand valve is arranged on the third branch.

Preferably, the system further comprises a first return pipeline and a second return pipeline, wherein the first return pipeline is communicated with the first circulation loop, and a first return valve is arranged on the first return pipeline; the second return pipeline is communicated with the second circulation loop, and a second return valve is arranged on the second return pipeline.

Preferably, the system further comprises a first heating pipeline, a second heating pipeline and a first heating valve, one end of the first heating pipeline is communicated with the power source, the other end of the first heating pipeline is communicated with one end of the second heating pipeline, and the other end of the second heating pipeline is communicated with the first circulation loop.

Preferably, the system further comprises a third heating pipeline and a second heating valve, one end of the third heating pipeline is communicated with the other end of the first heating pipeline, the other end of the third heating pipeline is communicated with the first circulation loop, the first heating valve is arranged on the second heating pipeline, and the second heating valve is arranged on the third heating pipeline.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

according to the heating medium circulation system provided by the utility model, through arranging the first circulation assembly, the second circulation assembly, the first communication pipeline, the flow dividing valve, the second communication pipeline and the combining valve, the double-line or multi-line control of a single heating medium circulation pump is realized, the use efficiency of the heating medium circulation pump can be improved, the energy consumption and the control production cost can be reduced, the use quantity of the heating medium pump can be reduced, and the building space can be left to the greatest extent.

Drawings

FIG. 1 is a block diagram of a heating medium circulation system provided by the utility model;

FIG. 2 is a flow chart of example 2;

fig. 3 is a structural diagram of a conventional heat medium circulation system.

In the above figures:

1-a first block valve; 2-a third block valve; 3-diverter valve; 4-a first outlet valve; 5-a second outlet valve; 6-a first inlet valve; 7-a second inlet valve; 8-a combining valve; 9-a first backhand valve; 10-a second backhand valve; 11-fourth block valve; 12-a second block valve; 13-a first temperature increasing valve; 14-a second temperature increasing valve; 15-a second return valve; 16-a first return valve; 17-a regulating valve; 18-a first line; 19-a second line; 20-a third pipeline; 21-fourth pipeline; 22-a first communication line; 23-a second communication line; 24-a first branch; 25-a second branch; 26-a third branch; 27-a first return line; 28-a second return line; 29-a first warming line; 30-a second heating pipeline; 31-a third heating pipeline.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to the heat medium circulation system shown in fig. 1 to 2, it includes a first circulation assembly, a second circulation assembly, a liquid phase assembly, specifically:

the first circulation assembly and the second circulation assembly are communicated through a first communication pipeline 22, and a diverter valve 3 is arranged on the first communication pipeline 22; the first circulation assembly and the second circulation assembly are also communicated through a second communication pipeline 23, and a combining valve 8 is arranged on the second communication pipeline 23; the first circulation component is communicated with the first system, the second circulation component is communicated with the second system, and the diverter valve 3 and the combining valve 8 are opened, so that the conventional circulation work of the two systems can be realized.

The first circulation assembly comprises a first circulation loop, a first heat medium circulation pump (indicated by A in fig. 1) arranged on the first circulation loop, a first outlet valve 4, a first isolating valve 1, a second isolating valve 12 and a first inlet valve 6, wherein the first circulation loop comprises a first pipeline 18 and a second pipeline 19, one end of the first pipeline 18 is communicated with the first heat medium circulation pump, the other end of the first pipeline 18 is communicated with a first system, the first outlet valve 4 and the first isolating valve 1 are arranged on the first pipeline 18, and the first outlet valve 4 is close to the outlet of the first heat medium circulation pump than the first isolating valve 1; one end of a second pipeline 19 is communicated with the inlet of the first heat medium circulating pump, the other end of the second pipeline 19 is communicated with the first pipeline 18, the second isolating valve 12 and the first inlet valve 6 are arranged on the second pipeline 19, and the first inlet valve 6 is closer to the inlet of the first heat medium circulating pump than the second isolating valve 12.

The second circulation assembly comprises a second circulation loop, a second heat medium circulation pump (indicated by B in fig. 1) arranged on the second circulation loop, a second outlet valve 5, a third isolating valve 2, a fourth isolating valve 11 and a second inlet valve 7, wherein the second circulation loop comprises a third pipeline 20 and a fourth pipeline 21, one end of the third pipeline 20 is communicated with an outlet of the second heat medium circulation pump, the other end of the third pipeline 20 is communicated with a second system, the second outlet valve 5 and the third isolating valve 2 are arranged on the third pipeline 20, and the second outlet valve 5 is close to the outlet of the second heat medium circulation pump than the third isolating valve 2; one end of a fourth pipeline 21 is communicated with the inlet of the first heat medium circulating pump, the other end of the fourth pipeline 21 is communicated with a third pipeline 20, a fourth isolating valve 11 and a second inlet valve 7 are arranged on the fourth pipeline 21, and the second inlet valve 7 is closer to the inlet of the second heat medium circulating pump than the fourth isolating valve 11.

The first communication pipeline 22 is located between the first pipeline 18 and the third pipeline 20 and is communicated with both the first pipeline 18 and the third pipeline 20; the second communication pipe 23 communicates with the second block valve 12 and the fourth block valve 11, and the second communication pipe 23 is located between the second pipe 19 and the fourth pipe 21 and communicates with both the second pipe 19 and the fourth pipe 21.

In the embodiment, an outlet valve and an inlet valve are respectively reserved on inlet and outlet pipelines of the first heat medium circulating pump and the second heat medium circulating pump, the outlet valve and the inlet valve are stop valves, the two lines can be independent respectively and are not influenced by each other, and the two lines can be used for starting, stopping, cooling and oil discharging of the single line in the polyester production and used for starting and heating of the single line.

In this example, one of the first heat medium circulation pump and the second heat medium circulation pump works normally, and the other one works as a standby.

Further, the heat medium circulation system further comprises a liquid phase component, the liquid phase component comprises a liquid phase loop, a regulating valve 17, a first back hand valve 9 and a second back hand valve 10, the liquid phase loop is provided with a first outlet end and a second outlet end, the first outlet end is communicated with a power source, the power source is used for conveying heat medium to a first heat medium circulation pump and a second heat medium circulation pump, the regulating valve is arranged on a pipeline of the first outlet end and the power source, the first circulation loop is communicated with the first outlet end, the second circulation loop is communicated with the second outlet end, the first back hand valve is arranged on a pipeline of the first circulation loop and the first outlet end, and the second back hand valve is arranged on a pipeline of the second circulation loop and the second outlet end.

Referring to the figure, the liquid-phase circuit includes a first branch 24, a second branch 25, and a third branch 26, one end of the first branch 24 is communicated with a power source (HMP in fig. 1), the other end of the first branch 24 is communicated with one end of the second branch 25, the other end of the second branch 25 is communicated with the first circulation circuit, one end of the third branch 26 is communicated with the other end of the first branch 24, the other end of the third branch 26 is communicated with the first circulation circuit, the regulating valve 17 is disposed on the first branch 24, the first back hand valve 9 is disposed on the second branch 25, and the second back hand valve 10 is disposed on the third branch 26.

When the heating medium is delivered to the first system, the first backhand valve 9 is opened; when the heating medium is supplied to the second system, the second backhand valve 10 is opened. The temperature of the secondary heating medium is changed by controlling the liquid phase loop to adjust the supplementary quantity of the primary heating medium.

The system further comprises a first return line 27 and a second return line 28, wherein the first return line 27 is communicated with the first circulation loop, and the first return line 27 is provided with a first return valve 16; the second return line 28 communicates with the second circulation circuit, and the second return line 28 is provided with a second return valve 15. When the heat of the system is more, the first reflux valve is opened, so that the heat is sent back to the heat medium station through the first reflux valve; or opening the second return valve so that heat is sent back to the media station through the second return valve.

Wherein the first back hand valve 9 corresponds to the first back flow valve 16, and means to be opened and closed simultaneously; the second backhand valve 10 corresponds to the second return valve 15, meaning open simultaneously, closed simultaneously.

The system further comprises a first heating pipeline 29, a second heating pipeline 30, a third heating pipeline 31, a first heating valve 13 and a second heating valve 14, one end of the first heating pipeline 29 is communicated with a power source, the other end of the first heating pipeline 29 is communicated with one end of the second heating pipeline 30, the other end of the second heating pipeline 30 is communicated with the first circulation loop, and the other end of the second heating pipeline 30 is communicated with a pipeline between the second isolating valve 12 and the first inlet valve 6; one end of the third heating pipeline 31 is communicated with the other end of the first heating pipeline 29, the other end of the third heating pipeline 31 is communicated with the first circulation loop, and the other end of the third heating pipeline 31 is communicated with a pipeline between the second inlet valve 7 and the fourth isolating valve 11; the first temperature-raising valve is provided on the second temperature-raising pipe 30, and the second temperature-raising valve is provided on the third temperature-raising pipe 31.

The first temperature-raising valve 13 and the second temperature-raising valve 14 are single-line temperature-raising valves, and when the temperature of the first system is raised, the first temperature-raising valve 13 is opened; when the temperature is raised to the second system, the second temperature-raising valve 14 is opened.

Embodiments of the system are described below for operation of both the first system and the second system, and operation of one of the first system and the second system, see example 1, example 2, and example 3.

Example 1

In this example, the first system (M system) and the second system (N system) both operate, the first heat medium circulation pump works online, and the second heat medium circulation pump does not work.

During operation, the first heat medium circulating pump passes the high-temperature heat medium through the first outlet valve 4-the flow dividing valve 3-the third block valve 2-N-the fourth block valve 11-the combining valve 8-the first inlet valve 6-the first outlet valve 4-the first block valve 1-the second block valve 12-the first inlet valve 6, and the conventional circulation of two lines is completed.

In addition, when heat is transmitted, the power source provides primary heating medium, and the primary heating medium completes the temperature regulation of the liquid phase loop through the regulating valve 17, the first back hand valve 9 and the first inlet valve 6; the system completes two-line secondary heat medium collection and delivery to a heat medium station for heating and temperature rise through opening a first return valve 15 and a second return valve 16 (excessive heat is discharged through the first return valve 16 and the second return valve 15), and the system is recycled. When the first return valve 16 is opened, the secondary heating medium passes through the first outlet valve 4, the first block valve 1 and the first return valve 16; when the first return valve 15 is opened, the secondary heating medium passes through the second outlet valve 5-the third block valve 2-the first return valve 15.

Example 2

In this example, the first system (M system) is off-line, the second system (N system) is running, the first heat medium circulation pump is on-line, and the second heat medium circulation pump is not on-line.

When the heat medium circulating pump runs, the heat medium is circulated in a single line through the first outlet valve 4, the flow dividing valve 3, the third block valve 2, the N, the fourth block valve 11, the combining valve 8 and the first inlet valve 6.

In addition, when heat is transmitted, the power source provides primary heating medium, the primary heating medium completes the temperature regulation of the liquid phase loop through the regulating valve 17, the second back hand valve 10 and the second inlet valve 7, and the system completes the heating and the temperature rise of the N-line secondary heating medium transmitted back to the heating medium station through the second outlet valve 5, the third isolating valve 2 and the second reflux valve 15 for recycling. The first block valve 1, the second block valve 12, the first reflux valve 16 and the first backhand valve 9 of the M-line inlet and outlet system are closed to form complete isolation of the M-line heating medium system, and the temperature can be reduced and the oil can be discharged independently.

Example 3

In the embodiment, the second system (N system) operates, the first system (M system) starts to heat, the first heat medium circulating pump works on line, and the second heat medium circulating pump does not work. Wherein the M system is cold as soon as it is not operating.

In addition, when heat is transmitted, the power source provides primary heating medium, the primary heating medium completes the temperature regulation of the liquid phase loop through the regulating valve 17, the second back hand valve 10 and the second inlet valve 7, and the system completes the heating and the temperature rise of the N-line secondary heating medium transmitted back to the heating medium station through the second outlet valve 5, the third isolating valve 2 and the second reflux valve 15 for recycling.

In order to meet the requirement that the M-line independent temperature rise and the N-line independent operation need to close the split valve 3 and the combining valve 8, the flow of the first outlet valve 4-split valve 3-third block valve 2-N-fourth block valve 11-combining valve 8-first inlet valve 6 of the original N-system operation needs to be replaced by the flow of the second outlet valve 5-third block valve 2-N-fourth block valve 11-second inlet valve 7.

The first outlet valve 4, the first block valve 1, the second block valve 12 and the first inlet valve 6 of the heating process of the M system are synchronously opened, and the first heating valve 13 and the first reflux valve 16 can realize independent heating of M lines. After the completion of the temperature increase, the flow dividing valve 3 and the combining valve 8 are opened, and the second outlet valve 5 and the second inlet valve 7 are closed at the same time to perform a two-system cycle of the first outlet valve 4-the flow dividing valve 3-the third block valve 2-N-the fourth block valve 11-the combining valve 8-the first inlet valve 6 and the first outlet valve 4-the first block valve 1-the second block valve 12-the first inlet valve 6 according to the procedure of embodiment 1.

The heat medium circulation system of this example has the following advantages:

1. in terms of equipment installation cost, two independent operation structures are normally needed for the two systems, and then two independent devices are needed from piping to installation, but the system of the embodiment solves the problem, saves the configuration cost and also makes a traditional mode of backup. It can be seen that the cost of about 10 ten thousand yuan is roughly estimated if all the supporting facilities such as manual work, civil engineering, piping, electric cabinet control and the like are added. The system is only one system with two lines, and if two similar systems are calculated, the system can save nearly forty thousand yuan;

2. from the aspect of operation energy efficiency, if a 2-line material section is opened according to a conventional process, 6 heat medium circulating pumps of a melt line system in front of a kettle, a reaction kettle system and a melt line system behind the kettle are needed, one heat medium pump consumes about 624 DEG electricity according to power of 26kw/h, one heat medium pump consumes 227760 DEG electricity in one year, the temperature of 6 heat medium pumps is 1366560 DEG, industrial electricity is 0.67 yuan/DEG, and electricity charge is 915595 yuan. According to the system, a group of pumps can control a single independent system of two lines, so that only 3 heat medium circulating pumps are needed for the material sections of the two lines, and the electricity charge can be saved by half, namely 457797 yuan;

3. from the analysis on the operation condition and effect, according to the conventional flow, the single pump single supply and the single pump double control have little difference on the operation condition, no noise exists on site, the pump body temperature and the operation current are below rated current (the details are shown in table 1, which is the regenerated workshop test data, only by comparison and has no other meaning), and the service efficiency of the heat medium pump is exerted to the greatest extent by the single pump double control on the operation effect, so that the method is more suitable for the production of regenerated polyester.

In the heating medium circulation system of the embodiment, one heating medium pump can be used for two lines (an M system and an N system), wherein the two lines are respectively two independent systems, firstly, the heating medium pump is required to meet production in terms of supply, and the heating medium pump is required to meet the consumption in the piping; the inlet and outlet pipelines of a group of heat medium pumps are mutually communicated and are controlled by a hand valve, the switch of the valve can realize 'one pump double control lines, two inlets and two outlets', and the inlet and outlet pipelines are provided with inlet and outlet valves like a normal temperature control system so as to be convenient for switching before two pumps. If one of the systems has problems, the other system can be supplied with heat energy, emergency and emergency situations can be handled, and the system is more flexible.

In this example, the line corresponding to each pump in the group of heat medium pumps is a complete closed circulation loop (i.e. each line is provided with an independent reflux valve), so that the secondary heat medium in each line can return to the furnace area, the generated water vapor and low-boiling substances can be completely removed, and meanwhile, the opening of the reflux valve is controlled to adjust the temperature of the single line.

The heating medium circulation system of the embodiment belongs to the field of heating medium circulation heating process flow, is suitable for conveying high-temperature liquid without solid particles, and is mainly suitable for being widely applied to petroleum and chemical industries, grease industries, synthetic fiber industries, textile printing and dyeing industries, plastics and rubber industries and the like.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. The heat medium circulation system is characterized by comprising a first circulation assembly and a second circulation assembly, wherein the first circulation assembly is communicated with the second circulation assembly through a first communication pipeline, and a flow dividing valve is arranged on the first communication pipeline; the first circulating assembly is communicated with the first system and comprises a first circulating loop, a first heating medium circulating pump, a first outlet valve, a first isolating valve, a second isolating valve and a first inlet valve, wherein the first heating medium circulating pump, the first outlet valve, the first isolating valve, the second isolating valve and the first inlet valve are arranged on the first circulating loop;

2. The heat medium circulation system of claim 1, wherein the first circulation loop comprises a first pipeline and a second pipeline, one end of the first pipeline is communicated with the first heat medium circulation pump, the other end of the first pipeline is communicated with the first system, and the first outlet valve and the first isolation valve are arranged on the first pipeline; one end of the second pipeline is communicated with the inlet of the first heat medium circulating pump, the other end of the second pipeline is communicated with the first pipeline, and the second isolating valve and the first inlet valve are arranged on the second pipeline.

3. The heat medium circulation system of claim 2, wherein the first outlet valve is closer to the first heat medium circulation pump outlet than the first block valve.

4. The heat medium circulation system of claim 2, wherein the second circulation loop comprises a third pipeline and a fourth pipeline, one end of the third pipeline is communicated with the outlet of the second heat medium circulation pump, the other end of the third pipeline is communicated with the second system, and the second outlet valve and the third isolation valve are both arranged on the third pipeline; one end of the fourth pipeline is communicated with the inlet of the first heat medium circulating pump, the other end of the fourth pipeline is communicated with the third pipeline, and the fourth isolating valve and the second inlet valve are arranged on the fourth pipeline; the first communication pipeline is communicated with the first pipeline and the third pipeline.

5. The heat medium circulation system of claim 4, wherein said second outlet valve is closer to said second heat medium circulation pump outlet than said third block valve.

6. The heat medium circulation system of claim 1, further comprising a liquid phase assembly, wherein the liquid phase assembly comprises a liquid phase loop, a regulating valve, a first back hand valve, and a second back hand valve, the liquid phase loop has an inlet end, a first outlet end, and a second outlet end, the inlet end is in communication with the power source, the regulating valve is disposed on a pipeline in which the inlet end is in communication with the power source, the first circulation loop is in communication with the first outlet end, the second circulation loop is in communication with the second outlet end, the first back hand valve is disposed on a pipeline in which the first circulation loop is in communication with the first outlet end, and the second back hand valve is disposed on a pipeline in which the second circulation loop is in communication with the second outlet end.

7. The heating medium circulation system of claim 6, wherein the liquid phase circuit comprises a first branch, a second branch and a third branch, one end of the first branch is communicated with the power source, the other end of the first branch is communicated with one end of the second branch, the other end of the second branch is communicated with the first circulation circuit, one end of the third branch is communicated with the other end of the first branch, the other end of the third branch is communicated with the first circulation circuit, the regulating valve is arranged on the first branch, the first back hand valve is arranged on the second branch, and the second back hand valve is arranged on the third branch.

8. The heat medium circulation system of claim 1, further comprising a first return line and a second return line, wherein the first return line is in communication with the first circulation loop, and wherein the first return line is provided with a first return valve; the second return pipeline is communicated with the second circulation loop, and a second return valve is arranged on the second return pipeline.

9. The heat medium circulation system of claim 1, further comprising a first heating line, a second heating line, and a first heating valve, wherein one end of the first heating line is connected to the power source, the other end of the first heating line is connected to one end of the second heating line, and the other end of the second heating line is connected to the first circulation loop.

10. The heat medium circulation system of claim 9, further comprising a third heating line and a second heating valve, wherein one end of the third heating line is connected to the other end of the first heating line, the other end of the third heating line is connected to the first circulation loop, the first heating valve is disposed on the second heating line, and the second heating valve is disposed on the third heating line.