CN219866869U - heat tracing system - Google Patents

Abstract

The present utility model provides a heat tracing system, comprising: a heat exchanger; the material heat tracing pipelines are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline is communicated with the liquid inlet end of the heat exchanger through a second pipeline; the self-operated temperature control CSDV valve is provided with a plurality of material heat tracing pipelines which are arranged at the communication position of the second pipeline in a one-to-one correspondence manner, and is used for controlling the on-off between the corresponding material heat tracing pipelines and the heat exchanger; the integrated heat distribution station is communicated with the liquid outlet end of the heat exchanger through a third pipeline and the other end part of each material heat tracing pipeline, which is not communicated with the second pipeline, and is used for distributing liquid heat tracing medium from the heat exchanger to each material heat tracing pipeline. The utility model realizes the accurate control of the temperature and flow of each material heat tracing pipeline and avoids the problem that the remote material heat tracing pipeline is easy to block and short-circuit.

Description

Heat tracing system

Technical Field

The embodiment of the utility model relates to the technical field of petrochemical material conveying, in particular to a heat tracing system.

Background

At present, the flow and the temperature in the heat tracing pipeline of each material cannot be accurately controlled in the heat tracing system applied to petrochemical materials;

in addition, the material conveying pipelines at the far end and the near end (defined by the distance between the heat tracing material and the heat exchanger) have the problem of uneven flow, namely: under the condition that the pressure of the initially applied liquid heat tracing medium flowing into the material heat tracing pipeline is the same, as the mileage of the liquid heat tracing medium flowing through the material heat tracing pipeline at the far end is longer, the pressure in the material heat tracing pipeline at the far end is lower than that of the material heat tracing pipeline at the near end, and the flow is smaller than that of the liquid heat tracing medium in the material heat tracing pipeline at the near end, so that the short circuit is easier to be blocked.

Disclosure of Invention

The embodiment of the utility model provides a heat tracing system for solving the problem that the flow and the temperature in heat tracing pipelines of various materials cannot be accurately controlled in the existing heat tracing system applied to petrochemical materials; the material conveying pipelines at the end and the near end (defined by the distance between the heat tracing material and the heat exchanger) also have the problem that the flow is uneven and the far-end material conveying pipeline is more prone to blocking short circuit.

In order to solve the technical problems, the utility model is realized as follows:

the embodiment of the utility model provides a heat tracing system, which comprises:

a heat exchanger;

the material heat tracing pipelines are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline is communicated with the liquid inlet end of the heat exchanger through a second pipeline;

the self-operated temperature control CSDV valve is provided with a plurality of material heat tracing pipelines which are arranged at the communication position of the second pipeline in a one-to-one correspondence manner, and is used for controlling the on-off between the corresponding material heat tracing pipelines and the heat exchanger;

the integrated heat distribution station is communicated with the liquid outlet end of the heat exchanger through a third pipeline and the other end part of each material heat tracing pipeline, which is not communicated with the second pipeline, and is used for distributing liquid heat tracing medium from the heat exchanger to each material heat tracing pipeline.

Optionally, the method further comprises:

and the pumping device is arranged on the second pipeline and is used for pumping the liquid heat tracing medium in the second pipeline into the heat exchanger.

Alternatively, the process may be carried out in a single-stage,

the heat exchanger is communicated with a steam air source through a first pipeline;

the heat tracing system further comprises:

and the temperature regulating valve is arranged on the first pipeline and is used for controlling the steam flow entering the heat exchanger.

Alternatively, the process may be carried out in a single-stage,

the heat tracing system further comprises:

and the temperature sensor is arranged on the third pipeline, is electrically connected with the temperature regulating valve and is used for measuring the temperature value of the liquid heat tracing medium in the third pipeline and transmitting the temperature value to the temperature regulating valve.

Alternatively, the process may be carried out in a single-stage,

the temperature sensor is in wireless communication connection with the temperature regulating valve.

Alternatively, the process may be carried out in a single-stage,

the air inlet end of the heat exchanger is communicated with a steam air source through a first pipeline;

the heat tracing system further comprises:

the drain valve is arranged at the air outlet end of the heat exchanger.

Alternatively, the process may be carried out in a single-stage,

the integrated heat distribution station comprises:

the base is provided with a first cavity, one end part of the base is provided with a first opening communicated with the first cavity, and the first opening is communicated with the liquid outlet end of the heat exchanger through the third pipeline;

the heat distribution valves are provided with a plurality of groups, the heat distribution valves are arranged on the base body at intervals and are communicated with the material heat tracing pipelines in a one-to-one correspondence manner, and the heat distribution valves are used for controlling the on-off state between the corresponding material heat tracing pipelines and the first chamber.

Alternatively, the process may be carried out in a single-stage,

the seat body is in a circular tube shape, and the first cavity is a tube cavity of the seat body;

the heat distribution valves are arranged on the peripheral outer wall of the seat body at intervals.

Alternatively, the process may be carried out in a single-stage,

the heat distribution valve is a plug valve.

Alternatively, the process may be carried out in a single-stage,

the heat exchanger comprises at least one of the following: a gas heat exchanger and an electric heat exchanger.

The heat tracing system of the embodiment of the utility model comprises: a heat exchanger; the material heat tracing pipelines are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline is communicated with the liquid inlet end of the heat exchanger through a second pipeline; the self-operated temperature control CSDV valves are provided with a plurality of material heat tracing pipelines and are arranged at the communication positions of the material heat tracing pipelines and the second pipeline in a one-to-one correspondence manner, and the CSDV valves are used for controlling the on-off state between the corresponding material heat tracing pipelines and the heat exchanger; the integrated heat distribution station is communicated with the liquid outlet end of the heat exchanger through a third pipeline and is communicated with the other end part of each material heat tracing pipeline which is not communicated with the second pipeline, and is used for distributing liquid heat tracing medium from the heat exchanger to each material heat tracing pipeline. According to the embodiment of the utility model, the temperature and the flow of each material heat tracing pipeline are accurately controlled by arranging the CSDV valve, the problem that the material heat tracing pipeline is easy to block and short-circuit due to small flow of the material heat tracing pipeline at the far end is avoided based on the accurate control, the energy consumption of heat tracing is reduced based on the accurate control, and the resource is saved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic block diagram of a heat trace system according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a heat tracing system for hot water heat tracing according to an embodiment of the present utility model;

wherein:

1. a heat exchanger; 2. a material heat tracing pipeline; 3. a CSDV valve;

4. an integral heat distribution station; 41. a base, 42, a heat distribution valve;

5. a pumping device; 51. pump body, 52, manometer; 53. a check valve;

6. a temperature regulating valve; 7. a temperature sensor; 8. a drain valve;

c. a first pipe; a. a second pipe; b. and a third pipeline.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. 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.

The embodiment of the utility model provides a heat tracing system, which is shown in fig. 1 and 2, wherein arrows on a pipeline and a pipeline in fig. 2 indicate flow directions, and the heat tracing system comprises:

a heat exchanger 1;

the material heat tracing pipelines 2 are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline 2 is communicated with the liquid inlet end of the heat exchanger 1 through a second pipeline a;

the self-operated temperature control CSDV valves 3 are provided with a plurality of one-to-one correspondence and are arranged at the communication positions of the material heat tracing pipelines 2 and the second pipeline a, and the CSDV valves 3 are used for controlling the on-off of the corresponding material heat tracing pipelines 2 and the heat exchanger 1;

the integral heat distribution station 4 is communicated with the liquid outlet end of the heat exchanger 1 through a third pipeline b and the other end part of each material heat tracing pipeline 2 which is not communicated with the second pipeline a, and is used for distributing the liquid heat tracing medium from the heat exchanger 1 into each material heat tracing pipeline 2.

The self-operated temperature control CSDV valve 3, CSDV is an abbreviation of Condensate Sensing Drain Valve, means a sensing medium temperature type drain valve, and is a self-operated valve. The CSDV valve 3 senses the medium temperature and changes its opening degree.

In some embodiments of the present utility model, the CSDV valve 3 may be a bellows-type automatic valve with a thermal static wax-filled, wherein when the medium discharge temperature is higher than the set temperature, the valve opening automatically becomes smaller, and the constant medium discharge temperature is maintained by reducing the flow rate; when the medium discharge temperature is lower than the set temperature, the valve opening automatically becomes large, and the medium is rapidly discharged by increasing the flow rate. The conventional set temperature for the CSDV valve 3 is 41 ℃,52 ℃,82 ℃,99 ℃ and 116 ℃.

Through setting up self-operated control by temperature change CSDV valve 3 to set up CSDV valve 3 in the department that is linked together of each material heat tracing pipeline 2 and second pipeline a with the one-to-one, CSDV valve 3 is used for controlling the break-make between corresponding material heat tracing pipeline 2 and the heat exchanger 1, through setting for the settlement temperature of each CSDV valve 3 independently, can accurate control different material heat tracing pipeline 2 backward flow liquid heat tracing medium's temperature and flow, make full use of liquid heat tracing medium sensible heat. Based on the accurate control, the problem of uneven flow of the material heat tracing pipeline 2 at the near end and the far end (defined by the distance of the heat tracing material relative to the heat exchanger 1) in the conventional heat tracing equipment is solved, namely, the flow of the reflux liquid heat tracing medium is adjusted according to the temperature, and the flow of the liquid heat tracing medium in the far-end heat tracing pipeline is long in mileage, is easier to cool and is easier to reach the set temperature of the CSDV valve 3, so that the opening of the CSDV valve 3 is larger, and the flow of the material heat tracing pipeline 2 at the far end is increased; correspondingly, for the material heat tracing pipeline 2 at the near end, the opening degree of the CSDV valve 3 is small, so that the flow of the material heat tracing pipeline 2 at the near end is reduced, the problem of uneven flow of the material heat tracing pipeline 2 at the near end and the far end is solved, and the problem that the material heat tracing pipeline 2 is easy to block and short-circuit due to the small flow of the material heat tracing pipeline 2 at the far end is avoided.

In practical application, under the condition that the liquid heat tracing medium is water, the self-operated temperature control CSDV valve 3 is adopted, so that the advantages of automatically controlling the backwater temperature, meeting the pressure balance requirement, reducing the circulating water quantity of hot water by more than 80 percent and the like are achieved; the water temperature flowing to each material heat tracing pipeline 2 is controlled in the heat exchange station (namely, the heat exchanger 1), so that the scale of the heat exchange station (namely, the pipe diameter of temperature control equipment aiming at each material heat tracing pipeline 2) and the pipe diameter of pipelines can be reduced, the total investment is saved, the running cost is reduced, namely, the heat dissipation loss of a heat tracing system is reduced under the condition of reducing the disposable investment.

The following describes the technical effects of the embodiment of the present utility model with reference to examples and measured data:

for example, a petrochemical enterprise hot water heat tracing project is that the liquid heat tracing medium is water, 8 hot water heat tracing pipelines (namely material heat tracing pipeline 2) are respectively 4 DN1000 crude oil ship unloading lines, 3 DN700 crude oil supply lines and 1 DN900 diesel oil ship unloading line, the heat tracing water supply temperature is 95 ℃, the backwater temperature is 70 ℃ (70 ℃, namely the set temperature of the CSDV valve 3).

The conventional hot water heat tracing system is adopted, the hot water circulation quantity is about 680t/h, and the actual measurement of the hot water circulation quantity is about 400t/h by adopting the heat tracing system provided by the embodiment of the utility model. Compared with the traditional mode, the mode of carrying out hot water heat tracing by adopting the heat tracing system provided by the embodiment of the utility model reduces the hot water circulating water quantity by 240t/h, and has the beneficial effects that: firstly, the electricity consumption of a water pump (arranged in a second pipeline a and used for pumping backwater into the heat exchanger 1 again for heating) is reduced (backwater temperature is controlled through the CSDV valve 3, so that water flow meeting the set temperature can flow back to the heat exchanger 1, the circulation quantity of hot water is reduced, the operation power required to be achieved by the water pump is reduced, and the electricity consumption of the water pump is further reduced); secondly, the steam consumption of the steam heating hot water is reduced (the return water temperature is controlled through the CSDV valve 3, the heat tracing efficiency is improved, and then the steam consumption is reduced). The specific calculation is as follows:

(1) The electricity-saving benefit of the water pump:

annual energy saving benefit = (energy saving amount x electricity price x annual running time)/(10000)

＝(50×0.6×8000)÷10000

=24 (ten thousand yuan/year);

(2) Benefits of steam saving:

annual saving steam benefit= (steam saving amount x steam price x annual running time)/(10000)

＝(4.4×100×8000)÷10000

=352 (ten thousand yuan/year);

(3) Total energy saving benefit = electricity saving benefit + steam saving benefit = 24+352

=376 (ten thousand yuan/year).

The heat tracing system of the embodiment of the utility model comprises: a heat exchanger 1; the material heat tracing pipelines 2 are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline 2 is communicated with the liquid inlet end of the heat exchanger 1 through a second pipeline a; the self-operated temperature control CSDV valves 3 are provided with a plurality of one-to-one correspondence and are arranged at the communication positions of the material heat tracing pipelines 2 and the second pipeline a, and the CSDV valves 3 are used for controlling the on-off of the corresponding material heat tracing pipelines 2 and the heat exchanger 1; the integral heat distribution station 4 is communicated with the liquid outlet end of the heat exchanger 1 through a third pipeline b and the other end part of each material heat tracing pipeline 2 which is not communicated with the second pipeline a, and is used for distributing the liquid heat tracing medium from the heat exchanger 1 into each material heat tracing pipeline 2. According to the embodiment of the utility model, the CSDV valve 3 is arranged to realize accurate control of the temperature and flow of each material heat tracing pipeline 2, the problem that the material heat tracing pipeline 2 is easy to block and short-circuit due to small flow of the material heat tracing pipeline 2 at the far end is avoided based on the accurate control, and the energy consumption of heat tracing is reduced and the resource is saved based on the accurate control.

In some embodiments of the utility model, optionally, the heat tracing system further comprises:

and the pumping device 5 is arranged on the second pipeline a and is used for pumping the liquid heat tracing medium in the second pipeline a into the heat exchanger 1. Illustratively, referring to fig. 2, the pumping device 5 may include a pump body 51, a pressure gauge 52, and a check valve 53; the check valves 53 are provided in plural numbers at the liquid outlet end of the pump body 51 and the liquid inlet end of the pump body 51, and are used for preventing the liquid heat tracing medium from flowing backward, and improving the pumping efficiency of the pump body 51. The pressure gauge 52 is used for acquiring a pressure value of the liquid heat tracing medium flowing through the pump body 51.

In some embodiments of the utility model, optionally, referring to fig. 2, the heat exchanger 1 is in communication with a steam source through a first conduit c; the heat tracing system further comprises:

a temperature regulating valve 6 is provided on the first conduit c for controlling the flow of steam into the heat exchanger 1.

In some embodiments of the present utility model, the temperature regulating valve 6 may be a self-operated electrically controlled temperature regulating valve, and the self-operated electrically controlled temperature regulating valve has the greatest characteristic that only a common 220V power supply is needed, and the self-energy of the medium to be regulated is utilized to directly and automatically regulate and control the temperature of the medium such as steam, hot water, hot oil, gas, etc., and also can be used in the occasion of preventing overheat or heat exchange. The self-operated electric control temperature regulating valve has simple structure, convenient operation, wide temperature regulating range, quick response time, reliable sealing performance and random regulation in operation, thereby being widely applied to hot water supply in departments such as chemical industry, petroleum, food, light spinning, hotels, restaurants and the like.

In some embodiments of the utility model, the method, optionally,

referring to fig. 2, the heat tracing system further includes:

the temperature sensor 7 is arranged on the third pipeline b, is electrically connected with the temperature regulating valve 6, and is used for measuring the temperature value of the liquid heat tracing medium in the third pipeline b and transmitting the temperature value to the temperature regulating valve 6.

In the embodiment of the utility model, the temperature of the liquid heat tracing medium in the third pipeline b of the temperature sensor 7 is transferred to the temperature regulating valve 6, and the temperature regulating valve 6 regulates the steam flow entering the heat exchanger 1, so that the purpose of controlling the heating efficiency of the heat exchanger 1 on the liquid heat tracing medium is achieved. For example, the temperature value forwarded by the temperature sensor 7 is too high (higher than the preset temperature of the temperature regulating valve 6, which indicates that the temperature of the liquid heat tracing medium heated by the heat exchanger 1 is too high), the temperature regulating valve 6 reduces the opening degree of the temperature regulating valve, reduces the steam flow entering the heat exchanger 1, reduces the heating efficiency of the heat exchanger 1 on the liquid heat tracing medium, and then reduces the temperature of the liquid heat tracing medium.

In some embodiments of the utility model, the temperature sensor 7 is optionally connected in wireless communication with the temperature regulating valve 6.

The wireless communication connection is adopted, so that the construction task amount caused by wiring is avoided; in addition, in the petrochemical transportation process, transported petrochemical materials often have corrosiveness, and the wireless communication connection is adopted, so that the corrosion of the materials to wires is avoided, and the maintenance cost is reduced.

In some embodiments of the utility model, optionally, referring to fig. 2, the air inlet end of the heat exchanger 1 is in communication with a steam source through a first conduit c;

the heat tracing system further comprises:

and a drain valve 8 arranged at the air outlet end of the heat exchanger 1.

The drain valve, also called automatic drainer or condensate drainer, is divided into steam system use and gas system use. The drain valve 8 is arranged at the end of the pipeline heated by steam and is used for continuously discharging condensed water in the pipeline heated by steam to the outside of the pipeline.

In some embodiments of the utility model, the method, optionally,

referring to fig. 2, the integrated heat distribution station 4 comprises:

the base 41 is provided with a first chamber, one end part of the base 41 is provided with a first opening communicated with the first chamber, and the first opening is communicated with the liquid outlet end of the heat exchanger 1 through a third pipeline b;

the heat distribution valves 42 are provided with a plurality of groups, the heat distribution valves 42 are arranged on the base 41 at intervals and are communicated with the material heat tracing pipelines 2 in a one-to-one correspondence manner, and the heat distribution valves 42 are used for controlling the on-off of the corresponding material heat tracing pipelines 2 and the first chamber.

In the embodiment of the utility model, the integrated heat distribution station 4 is adopted to realize the selection of various tube bundle outlets, has the advantages of standardization and flexibility, is convenient for on-site inspection and maintenance management, and can reduce the cost of long-term maintenance and operation.

In some embodiments of the utility model, the method, optionally,

referring to fig. 2, the seat 41 is in a circular tube shape, and the first chamber is a tube cavity of the seat 41;

the plurality of groups of heat distribution valves 42 are provided at intervals on the peripheral outer wall of the housing 41.

In practical applications, the base 41 is vertically disposed relative to the ground plane, so that space required for arranging the heat tracing system can be effectively saved.

In some embodiments of the utility model, the method, optionally,

the heat distribution valve 42 is a plug valve.

In some embodiments of the utility model, the plug valve may be a plug valve employing a double seal ring of graphite and stainless steel to ensure no steam leakage. The valve rod cap can be arranged on the plug valve to protect the valve rod and the sealing surface, prevent dirt and prevent corrosion.

In some embodiments of the utility model, the method, optionally,

the heat exchanger 1 comprises at least one of the following types of devices: a gas heat exchanger and an electric heat exchanger.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims (10)

1. A heat trace system, comprising:

a heat exchanger;

the material heat tracing pipelines are provided with a plurality of material heat tracing pipelines, and one end part of each material heat tracing pipeline is communicated with the liquid inlet end of the heat exchanger through a second pipeline;

the self-operated temperature control CSDV valve is provided with a plurality of material heat tracing pipelines which are arranged at the communication position of the second pipeline in a one-to-one correspondence manner, and is used for controlling the on-off between the corresponding material heat tracing pipelines and the heat exchanger;

the integrated heat distribution station is communicated with the liquid outlet end of the heat exchanger through a third pipeline and the other end part of each material heat tracing pipeline, which is not communicated with the second pipeline, and is used for distributing liquid heat tracing medium from the heat exchanger to each material heat tracing pipeline.

2. The heat trace system according to claim 1, further comprising:

and the pumping device is arranged on the second pipeline and is used for pumping the liquid heat tracing medium in the second pipeline into the heat exchanger.

3. The heat trace system according to claim 1, wherein:

the heat exchanger is communicated with a steam air source through a first pipeline;

the heat tracing system further comprises:

and the temperature regulating valve is arranged on the first pipeline and is used for controlling the steam flow entering the heat exchanger.

4. A heat trace system according to claim 3, wherein:

the heat tracing system further comprises:

and the temperature sensor is arranged on the third pipeline, is electrically connected with the temperature regulating valve and is used for measuring the temperature value of the liquid heat tracing medium in the third pipeline and transmitting the temperature value to the temperature regulating valve.

5. The heat trace system according to claim 4, wherein:

the temperature sensor is in wireless communication connection with the temperature regulating valve.

6. The heat trace system according to claim 1, wherein:

the air inlet end of the heat exchanger is communicated with a steam air source through a first pipeline;

the heat tracing system further comprises:

the drain valve is arranged at the air outlet end of the heat exchanger.

7. The heat trace system according to claim 1, wherein:

the integrated heat distribution station comprises:

the base is provided with a first cavity, one end part of the base is provided with a first opening communicated with the first cavity, and the first opening is communicated with the liquid outlet end of the heat exchanger through the third pipeline;

the heat distribution valves are provided with a plurality of groups, the heat distribution valves are arranged on the base body at intervals and are communicated with the material heat tracing pipelines in a one-to-one correspondence manner, and the heat distribution valves are used for controlling the on-off state between the corresponding material heat tracing pipelines and the first chamber.

8. The heat trace system according to claim 7, wherein:

the seat body is in a circular tube shape, and the first cavity is a tube cavity of the seat body;

the heat distribution valves are arranged on the peripheral outer wall of the seat body at intervals.

9. The heat trace system according to claim 7, wherein:

the heat distribution valve is a plug valve.

10. The heat trace system according to claim 1, wherein:

the heat exchanger comprises at least one of the following: a gas heat exchanger and an electric heat exchanger.