CN212961798U - Automatic warm system of throwing of vapour heat exchanger - Google Patents
Automatic warm system of throwing of vapour heat exchanger Download PDFInfo
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- CN212961798U CN212961798U CN202021936629.4U CN202021936629U CN212961798U CN 212961798 U CN212961798 U CN 212961798U CN 202021936629 U CN202021936629 U CN 202021936629U CN 212961798 U CN212961798 U CN 212961798U
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Abstract
The utility model relates to an automatic heating system of a steam-steam heat exchanger, which comprises a steam-steam heat exchanger body and a hot side and a cold side main pipeline which are connected with the steam-steam heat exchanger body, wherein the hot side and the cold side main pipelines comprise an inlet heating pipe and an outlet heating pipe; the hot side inlet and the outlet heating pipe are respectively connected with a hot side heat supply steam extraction port and a heat supply header interface, and the cold side inlet and the outlet heating pipe are respectively connected with a cold side heat supply steam extraction port and a heat supply header interface; an electric regulating valve, a pipeline wall temperature monitoring device, a pipeline drainage device, a pipeline pressure measuring device and a flow measuring device are arranged on the main pipeline of the hot side and the main pipeline of the cold side; the hot side inlet is provided with a hot side warm pipe bypass, the hot side warm pipe bypass is provided with a hot side bypass control adjusting valve, the cold side inlet is provided with a cold side warm pipe bypass, and the cold side warm pipe bypass is provided with a cold side bypass control adjusting valve. The utility model discloses an automatic warm system of throwing of vapour heat exchanger can realize that the automation of heat exchanger system is thrown and is moved back, has reduced operating personnel's work load.
Description
Technical Field
The invention belongs to the technical field of cogeneration, and particularly relates to an automatic warm-throw system of a steam-steam heat exchanger, which is suitable for a thermal power plant for industrial steam heat supply.
Background
In industrial processes, electrical energy and thermal energy are two important ways of utilization. For the utilization of heat energy, the industrial heat supply requirements are different according to the process requirements, and the parameters of required heat supply steam are also different, wherein for the heat supply with the pressure higher than 4.0MPa and the temperature higher than 400 ℃, the high-parameter heat supply is called. For high-parameter heat supply, due to the fact that temperature and pressure are high, a proper steam extraction point cannot be found from a conventional thermal power plant directly, and generally, temperature reduction and pressure reduction heat supply can be performed only by adopting steam (such as main steam) with higher parameters, so that high-energy low-use is caused, and the utilization efficiency of energy is reduced.
In order to solve the problem, a steam reheating technology can be adopted in the cogeneration, thereby realizing the cascade utilization of high-parameter heat supply and improving the heat efficiency of circulation. In the steam reheating technology, the steam-steam heat exchange technology is that low-pressure steam and high-temperature steam are used for heating high-pressure steam and low-temperature steam, and the low-pressure steam and the high-temperature steam realize energy exchange in a steam-steam heat exchanger, wherein the steam-steam heat exchanger is key equipment of the technology, and the operational reliability of the steam-steam heat exchanger determines the applicability of the technology, so that the steam-steam heat exchanger has important significance for the research on the operational technology.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an automatic warm-throwing system of a steam-steam heat exchanger, which can realize the automatic throwing of the steam-steam heat exchanger.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: an automatic warm-throwing system of a steam-steam heat exchanger comprises a steam-steam heat exchanger body, and a hot side main pipeline and a cold side main pipeline which are connected to the steam-steam heat exchanger body, wherein the hot side main pipeline comprises a hot side inlet warm pipe and a hot side outlet warm pipe, and the cold side main pipeline comprises a cold side inlet warm pipe and a cold side outlet warm pipe;
the hot side inlet and the outlet heating pipe are respectively connected with a hot side heat supply steam extraction port and a hot side heat supply header interface, and the cold side inlet and the outlet heating pipe are respectively connected with a cold side heat supply steam extraction port and a cold side heat supply header interface;
the hot side main pipeline is provided with a hot side electric regulating valve, a hot side pipeline wall temperature monitoring device, a hot side pipeline drainage device, a hot side pipeline pressure measuring device and a hot side flow measuring device; the cold side main pipeline is provided with a cold side electric regulating valve, a cold side pipeline wall temperature monitoring device, a cold side pipeline drainage device, a cold side pipeline pressure measuring device and a cold side flow measuring device;
the hot side inlet is provided with a hot side warm pipe bypass, the hot side warm pipe bypass is provided with a hot side bypass control adjusting valve, the cold side inlet is provided with a cold side warm pipe bypass, and the cold side warm pipe bypass is provided with a cold side bypass control adjusting valve.
The technical scheme is further designed as follows: the hot side electric regulating valve comprises a hot side inlet electric regulating valve arranged on the hot side inlet warm pipe, a hot side inlet electric stop valve and a hot side outlet electric stop valve arranged on the hot side outlet warm pipe.
And the hot-side warm pipe bypass is spanned at two ends of the hot-side inlet electric stop valve.
The cold side electric regulating valve comprises a cold side inlet electric regulating valve arranged on the cold side inlet heating pipe, a cold side inlet electric stop valve and a cold side outlet electric stop valve arranged on the cold side outlet heating pipe.
The cold side warm pipe bypass is arranged across the cold side inlet electric stop valve.
The device for monitoring the wall temperature of the hot-side pipeline comprises a device for measuring the upper wall temperature of the hot-side inlet pipeline and a device for measuring the lower wall temperature of the hot-side inlet pipeline, which are arranged on the hot-side inlet warm pipe, and a device for measuring the upper wall temperature of the hot-side outlet pipeline and a device for measuring the lower wall temperature of the hot-side outlet pipeline, which are arranged on the hot-side outlet warm pipe.
The cold side pipeline wall temperature monitoring device comprises a cold side inlet pipeline upper wall temperature measuring device and a cold side inlet pipeline lower wall temperature measuring device which are arranged on the cold side inlet warm pipe, and a cold side outlet pipeline upper wall temperature measuring device and a cold side outlet pipeline lower wall temperature measuring device which are arranged on the cold side outlet warm pipe.
And two drainage pipelines are respectively arranged on the hot side inlet warm pipe, the hot side outlet warm pipe, the cold side inlet warm pipe and the cold side outlet warm pipe.
Each drainage pipeline is provided with a trigger drainage valve and a drainage manual valve.
Two paths of drain pipelines on the hot side inlet warm pipe are respectively arranged in front of the hot side inlet electric regulating valve and the hot side inlet electric stop valve; two paths of drain pipelines on the hot side outlet warm pipe are respectively arranged on two sides of the hot side outlet electric stop valve; two drainage pipelines on the cold side inlet warm pipe are respectively arranged in front of the cold side inlet electric regulating valve and the cold side inlet electric stop valve; two paths of drain pipelines on the cold side outlet warm pipe are respectively arranged on two sides of the cold side outlet electric stop valve.
The warm-up process of the automatic warm-up system comprises the following steps: warm throwing of warm pipes at a cold side and a hot side of the system is carried out in the first stage, in order to improve the warm throwing effect, the inlet and outlet pipelines at the cold side and the hot side are carried out simultaneously, and when the warm pipes of each pipeline system are all finished, the warm throwing is finished in the first stage; in the second stage, cold side warm throwing of the steam-steam heat exchanger body is carried out; in the third stage, warm casting is carried out on the hot side of the steam-steam heat exchanger body; the cold side and the hot side of the steam-steam heat exchanger are not performed simultaneously, and the cold side and the hot side are sequentially heated mainly in consideration of the fact that the temperature rise rate requirement of the heat exchanger is strict. According to the above sequence, after the third stage is completed, the end of the system warm-up can be confirmed.
The south ends of the heating pipes on the hot side and the cold side are judged according to the following conditions: t is tPTU-tPTD>0 and tPTU-tbsNot less than 0; wherein: t is tPTU: the temperature of the upper wall of the pipeline; t is tPTD: the temperature of the lower wall of the pipeline; t is tbs: the pipe corresponds to the saturation temperature at pressure.
The hot-cold side warm-throwing end of the steam-steam heat exchanger body is judged by the following conditions: t is tst-tbsNot less than 0; wherein: t is tst: cold side or hot side outlet steam temperature; t is tbs: cold side or hot side steam corresponds to the saturation temperature at pressure.
The invention has the beneficial effects that:
the automatic warm-throw system of the steam-steam heat exchanger comprises a heat fluid side warm-throw system, a cold fluid side warm-throw system and a steam-steam heat exchanger body warm-throw system, can realize automatic on-off of the heat exchanger system, reduces the workload of operators and improves the automation level of the system. Through setting up wall temperature measurement point, accurate control system warm throw temperature realizes the equipment warm throw quantization management, has improved the scientific level of equipment management.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a flow chart of the warm-up control of the system of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Examples
As shown in fig. 1, the automatic warming system of the steam-steam heat exchanger of the present embodiment includes a hot fluid side warming pipe system, a cold fluid side warming pipe system and a steam-steam heat exchanger body warming pipe system. The heating system of the steam-steam heat exchanger body comprises a steam-steam heat exchanger body, wherein a hot-side heating pipe and a cold-side heating pipe are arranged in the steam-steam heat exchanger body, a hot-side main pipeline and a cold-side main pipeline are respectively arranged on the hot-fluid-side heating pipe system and the cold-fluid-side heating pipe system, the hot-side main pipeline comprises a hot-side inlet heating pipe and a hot-side outlet heating pipe, and the cold-side main pipeline comprises a cold-side inlet heating pipe and a cold-side; the both ends of this internal hot side heating coil of vapour heat exchanger are connected with hot side entry heating coil and hot side export heating coil respectively, and the both ends of cold side heating coil are connected with cold side entry heating coil and cold side export heating coil respectively, and hot side entry and export heating coil respectively with hot side heat supply steam extraction port and hot side heat supply header interface connection, cold side entry and export heating coil respectively with cold side heat supply steam extraction port and cold side heat supply header interface connection.
A hot side inlet electric stop valve H _ I _ SV, a hot side inlet flow measuring device H _ I _ F, a hot side inlet pipeline pressure measuring device H _ I _ SP and a hot side inlet electric regulating valve H _ I _ CV are arranged on the hot side inlet warm pipe;
the hot side inlet heating pipe is provided with a hot side heating pipe bypass, the hot side heating pipe bypass is bridged at two ends of a hot side inlet electric stop valve H _ I _ SV, the steam consumption is less during heating, for accurately controlling the steam flow rate of the heating pipe, a heating pipe bypass is designed outside the main pipeline, the diameter of the heating pipe bypass is designed according to the flow rate of the heating pipe, and a hot side heating pipe bypass regulating valve H _ I _ PCV is designed on the heating pipe bypass and used for controlling the steam inlet flow rate of the bypass heating pipe. The flow of the heating pipe is determined according to the control of the temperature rise rate of the heating pipe, and the control of the temperature rise rate is determined according to the material of the pipeline and the hydrophobic property of the pipeline. In order to monitor the temperature rise rate of the pipeline, in this embodiment, an upper wall temperature measuring device H _ I _ PTU of the hot-side inlet pipeline and a lower wall temperature measuring device H _ I _ PTD of the hot-side inlet pipeline are designed on the hot-side inlet warm pipe, and are used for judging whether the pipe warm pipe is finished or not.
In order to meet the requirements of heating pipes, a drainage device is designed for a hot fluid side heating pipe system, a drainage tank H _ I _ SC is arranged in front of an electric stop valve H _ I _ SV at a hot side inlet, the drainage tank is provided with two drainage switches, one is a high-water-level switch, and the other is a low-water-level switch, and when the water level of the drainage tank is higher than the high water level, the drainage valve H _ I _ SCV1 is triggered to be opened to drain drainage; when the water level drops to a low water level switch of the drain tank, the drain valve H _ I _ SCV1 is triggered to be closed, and automatic drainage is realized; the road drainage water is also provided with a hot side inlet pipeline drainage hand valve H _ I _ SMV 1. The inlet section is also provided with a channel of drain, and a drain pipe and a hot side inlet warm pipe access point of the channel are arranged between the temperature measuring devices H _ O _ PTU and H _ O _ PTD and the inlet electric regulating valve H _ I _ CV, are close to the inlet electric regulating valve H _ I _ CV and serve as a discharge pipeline of the hot side inlet pipeline warm pipe. Can guarantee like this that entry section pipeline warm pipe scope is abundant big, and can guarantee that the terminal warm pipe of entry pipeline can be monitored effectively, be convenient for judge the warm pipe effect, be equipped with on this way drain pipe and trigger trap H _ I _ SCV2 and drainage hand valve H _ I _ SMV 2.
A hot side outlet temperature measuring device H _ O _ ST, a hot side outlet pipeline pressure measuring device H _ HE _ SP and a hot side outlet electric stop valve H _ O _ SV are arranged on the hot side outlet warm pipe, and in order to monitor the effect of the warm pipe, a hot side outlet pipeline upper wall temperature monitoring device H _ O _ PTU and a hot side outlet pipeline lower wall temperature monitoring device H _ O _ PTD are arranged on the hot side outlet warm pipe and used for judging whether the warm pipe is finished or not; in order to remove drainage of the heating pipe, two drainage pipes are arranged on the heating pipe at the hot side outlet and are respectively connected to two ends of the electric stop valve H _ O _ SV at the hot side outlet, and a triggering drainage valve H _ O _ SCV1, a drainage hand valve H _ O _ SMV1, a triggering drainage valve H _ O _ SCV2 and a drainage hand valve H _ O _ SMV2 are respectively arranged on the two drainage pipes.
The hot side entry heating pipe is for drawing steam port to pipeline before hot side entry electric control valve H _ I _ CV, and hot side entry heating pipe adopts the forward heating pipe mode, and the heating pipe flow is: hot side heating steam extraction opening → hot side heating pipe bypass control regulating valve H _ I _ PCV → heat exchanger hot side inlet pipeline drainage hand valve H _ I _ SMV2 and drainage control valve H _ I _ SCV2 → drainage flash tank, and the heating pipe steam flow control valve is hot side heating pipe bypass control regulating valve H _ I _ PCV.
The warm pipe of hot side export is the pipeline between hot side heat supply header interface to hot side export electric stop valve H _ O _ SV, and this pipeline section adopts reverse warm pipe mode, and steam comes from the heat supply header, and the warm pipe flow is: hot side header interface → heat exchanger hot side outlet pipeline drainage hand valve H _ O _ SMV1 and drainage control valve H _ O _ SCV1 → drainage flash tank, and the warm pipe steam flow control valve is drainage control valve H _ O _ SCV 1. The design of export section is hydrophobic all the way, and this drain pipe is close to heat exchanger export electric stop valve H _ O _ SV with the trunk line access point between temperature measuring device H _ O _ PTU, H _ O _ PTD and export electric stop valve H _ O _ SV, can guarantee like this that export section pipeline heating coil scope is abundant big, and can guarantee that the terminal heating coil of entry pipeline can be effectively kept watch on, is convenient for judge the heating coil effect.
A cold side inlet electric stop valve C _ I _ SV, a cold side inlet flow measuring device C _ I _ F, a cold side inlet pipeline pressure measuring device C _ I _ SP and a cold side inlet electric regulating valve C _ I _ CV are arranged on the cold side inlet warm pipe;
the cold side inlet warm pipe is provided with a cold side warm pipe bypass, the cold side warm pipe bypass is bridged at two ends of the cold side inlet electric stop valve C _ I _ SV and used for accurately controlling steam flow through the warm pipe, and the pipe diameter of the warm pipe bypass is designed according to the flow of the warm pipe. And a cold-side heating pipe bypass regulating valve C _ I _ PCV is designed on the heating pipe bypass and is used for controlling the steam inlet flow of the bypass heating pipe. The flow of the heating pipe is determined according to the control of the temperature rise rate of the heating pipe, and the control of the temperature rise rate is determined according to the material of the pipeline and the hydrophobic property of the pipeline. In order to monitor the temperature rise rate of the pipeline, a cold side outlet pipeline upper wall temperature measuring device C _ I _ PTU and a cold side outlet lower wall temperature measuring device (C _ I _ PTD) are designed and used for judging whether the pipeline warm-up is finished or not.
In order to meet the requirements of heating pipes, a drainage device is designed for a hot fluid side heating pipe system, wherein a drainage tank C _ I _ SC is arranged in front of a cold side inlet electric stop valve C _ I _ SV valve of a heat exchanger, the drainage tank is provided with two drainage switches, one is a high water level switch, the other is a low water level switch, automatic drainage is realized, and a triggering drainage valve C _ I _ SCV1 and a manual drainage valve C _ I _ SMV1 are arranged on the drainage. And a drain is also arranged in front of the heat exchanger cold side inlet electric regulating valve C _ I _ CV, the drain is close to the heat exchanger cold side inlet electric regulating valve C _ I _ CV and is used as a discharge pipeline of a cold side inlet pipeline warm pipe, and a triggering drain valve C _ I _ SCV2 and a drain manual valve C _ I _ SMV2 are arranged on the drain.
Be equipped with cold side outlet temperature measuring device C _ O _ ST on the cold side outlet warm tube, cold side outlet pipe pressure measuring device C _ HE _ SP and cold side outlet electric stop valve C _ O _ SV, in order to keep watch on the effect of warm tube, heat exchanger cold side outlet pipe upper wall temperature monitoring device C _ O _ PTU has been designed on the cold side outlet warm tube, heat exchanger cold side outlet pipe lower wall temperature monitoring device C _ O _ PTD has been designed simultaneously for judge that the warm tube is ended. In order to eliminate the drain of the warm pipe, a drain pipeline is designed before the cold side outlet electric stop valve C _ O _ SV, the drain discharge is controlled by a drain control valve C _ O _ SCV1, and a drain manual valve C _ O _ SMV1 of a cold side inlet pipeline is also arranged on the drain pipeline. A drain pipeline is also designed behind the cold side outlet electric stop valve C _ O _ SV, and a drain control valve C _ O _ SCV2 and a drain manual valve C _ O _ SMV2 are arranged on the drain pipeline.
Pipeline before cold side entry warm pipe is steam extraction mouth to vapour heat exchanger cold side entry electric control valve C _ I _ CV, and this pipeline section adopts the positive warm pipe mode, and the warm pipe flow is: cold side heat supply steam extraction opening → cold side warm pipe bypass control regulating valve C _ I _ PCV → heat exchanger cold side inlet pipeline drainage manual valve C _ I _ SMV2 and drainage control valve C _ I _ SCV2 → drainage flash tank, and the warm pipe steam flow control valve is cold side warm pipe bypass control regulating valve C _ I _ PCV. In order to prevent water accumulation in a pipeline before delivery, a drain tank C _ I _ SC is arranged in front of an electric stop valve C _ I _ SV at an inlet of a cold fluid side warm pipe system, the drain tank is provided with two drain switches, one is a high water level switch and the other is a low water level switch, and when the water level of the drain tank is higher than the high water level, the drain valve C _ I _ SCV1 is triggered to be opened to drain water; when the water level is reduced to the low water level switch of the drain tank, the drain valve C _ I _ SCV1 is triggered to be closed, and automatic drainage is realized. The entry section still designs to be hydrophobic all the way, and this drain pipe is close to entry electric control valve C _ I _ CV with the trunk line access point between temperature measuring device C _ O _ PTU, C _ O _ PTD and entry electric control valve C _ I _ CV, can guarantee like this that entry section pipeline heating coil scope is abundant big, and can guarantee that the terminal heating coil of entry pipeline can be effectively kept watch on, is convenient for judge the heating coil effect.
The pipeline between cold side export electric stop valve C _ O _ SV is supplied heat to the header interface to vapour heat exchanger cold side for cold side heat supply to the cold side, and this pipeline section adopts reverse warm pipe mode, and steam comes from the heat supply header, and the warm pipe flow is: cold side header interface → heat exchanger cold side outlet pipe drain manual valve C _ O _ SMV2 and drain control valve C _ O _ SCV2 → drain flash tank, and warm pipe steam flow control valve is drain control valve C _ O _ SCV 1. The design of export section is hydrophobic all the way, and this drain pipe is close to heat exchanger export electric stop valve C _ O _ SV with the trunk line access point between temperature measuring device C _ O _ PTU, C _ O _ PTD and export electric stop valve C _ O _ SV, can guarantee like this that export section pipeline heating coil scope is abundant big, and can guarantee that the terminal heating coil of export pipeline can be effectively kept watch on, is convenient for judge the heating coil effect.
In order to realize warm feeding of the steam-steam heat exchanger body, an inlet electric regulating valve H _ I _ CV is designed at the hot side of the steam-steam heat exchanger and used for controlling the steam flow of a warm pipe at the hot side of the heat exchanger body; a heat exchanger hot side inlet flow measuring device H _ I _ F is designed for measuring the flow of the steam in the heating pipe; a temperature measuring device H _ O _ ST is designed at the outlet of the hot side of the heat exchanger, and is used for detecting the temperature of the outlet steam and controlling the warm-up schedule of the heat exchanger body.
An inlet electric regulating valve C _ I _ CV is designed on the cold side of the steam-steam heat exchanger and is used for controlling the steam flow of a warm pipe on the cold side of the heat exchanger body; a heat exchanger cold side inlet flow measuring device C _ I _ F is designed for measuring the flow of the steam of the heating pipe; a temperature measuring device C _ O _ ST is designed at the outlet of the cold side of the heat exchanger, and the temperature of the outlet steam is detected to control the warm-up schedule of the heat exchanger body.
The hot side heating process of the steam-steam heat exchanger body comprises the following steps: hot side heating steam extraction opening → hot side heating pipe bypass control regulating valve H _ I _ PCV → inlet flow measuring device H _ I _ F → steam-steam heat exchanger hot side pipe → heat exchanger hot side outlet temperature measuring device H _ O _ ST → heat exchanger hot side outlet pipeline drainage manual valve H _ O _ SMV2 → drainage control valve H _ O _ SCV 2. The control valve of heating pipe is the other bypass control governing valve H _ I _ PCV of hot side heating pipe, and the design of export section is hydrophobic all the way, and this drain pipe is close to heat exchanger export electric stop valve H _ O _ SV with the trunk line access point between temperature measuring device H _ O _ ST and export electric stop valve H _ O _ SV, can guarantee like this that export section pipeline heating pipe scope is abundant big, and can guarantee that the terminal heating pipe of export pipeline can be effectively kept watch on, is convenient for judge the heating pipe effect.
The heat exchanger body cold side heating process is as follows: cold side heating steam extraction → cold side warm pipe bypass control regulator valve C _ I _ PCV → inlet flow measuring device C _ I _ F → steam-steam heat exchanger cold side pipe → heat exchanger cold side outlet temperature measuring device C _ O _ ST → heat exchanger cold side outlet pipe drain manual valve C _ O _ SMV1 → drain control valve C _ O _ SCV 1. The control valve of heating pipe is the other bypass control governing valve C _ I _ PCV of hot side heating pipe, and the design of export section is hydrophobic all the way, and this drain pipe is close to heat exchanger export electric stop valve C _ O _ SV with the trunk line access point between temperature measuring device C _ O _ ST and export electric stop valve C _ O _ SV, can guarantee like this that export section pipeline heating pipe scope is abundant big, and can guarantee that the terminal heating pipe of export pipeline can be effectively kept watch on, is convenient for judge the heating pipe effect.
The warm pipe at the hot side and the cold side of the system is judged by the following conditions:
tPTU-tPTD>0 (1)
and t isPTU-tbs≥0 (2)
In the formula: t is tPTU: temperature of the upper wall of the pipeline at DEG C; t is tPTD: temperature of lower wall of the duct, deg.C; t is tbs: the saturation temperature, DEG C, of the pipeline under the corresponding pressure; t is tbs＝f(ps) As the pressure of the pipeline steam (p)s) The temperature of the saturated steam can be found out by a steam property table, and when the fluid in the pipe is the saturated steam, the equation (2) takes an equal sign. p is a radical ofsMeasured by a pressure measuring device of the pipeline.
Among the above-mentioned formula, formula (1) can get rid of intraductal hydrophobic phenomenon, and formula (2) guarantee that pipe pipeline temperature is close to intraductal saturated steam temperature, can satisfy like this that steam does not condense in the pipeline to guarantee to flow and not take place the phenomenon that soda coexists, avoid the pipeline to appear the water hammer injury.
When the formula (1) and the formula (2) are simultaneously satisfied, the end of the pipeline warm-up can be ensured.
The warm-up end of the cold and hot side of the system heat exchanger body is judged by the following conditions:
tst-tbs≥0 (3)
in the formula: t is tst: cold side or hot side outlet steam temperature, ° c; t is tbs: cold side or hot side steam corresponds to saturation temperature at pressure, deg.C; t is tbs＝f(ps) As the pressure of the pipeline steam (p)s) The temperature of the saturated steam can be found by the steam property table, when the fluid in the pipe is saturated steam, the equation (3) takes the equal sign, psMeasured by the pressure measuring device of the outlet. The temperature of the whole system warm pipe is replaced by the temperature of the outlet steam, the steam is positioned at the tail end of the whole hot side or cold side, when the temperature reaches the saturated steam temperature, the temperature of the whole system reaches or is higher than the saturated temperature, and the metal thermal resistance is small, so that the metal can be considered to reach the saturated temperature, and the system warm-up is finished.
The embodiment can also add time selection, namely, when the temperature reaches the warm-up finish temperature, delaying for a period of time, for example, 10 minutes, specifically determined according to the actual physical properties of the system, and used as the standard for judging the end of warm-up, so as to ensure the warm-up effect.
The method can be determined according to the actual physical properties of the system and used as a standard for judging the completion of the warm-up operation, so that the warm-up operation effect is ensured.
As shown in fig. 2, the flow of the automatic warming system of the steam-steam heat exchanger in the embodiment is as follows: warm throwing of cold side and hot side pipelines of the system is carried out in the first stage, in order to improve the warm throwing effect, the inlet and outlet pipelines of the cold side and the hot side are carried out simultaneously, and when the warm pipes of each pipeline system are finished, the warm throwing is finished in the first stage; in the second stage, cold side warm throwing of the steam-steam heat exchanger body is carried out; and in the third stage, warm casting of the hot side of the steam-steam heat exchanger body is carried out. The cold side and the hot side of the steam-steam heat exchanger are not performed simultaneously, and the cold side and the hot side are sequentially heated mainly in consideration of the fact that the temperature rise rate requirement of the heat exchanger is strict. According to the above sequence, after the third stage is completed, the end of the system warm-up can be confirmed.
The automatic warming system of the steam heat exchanger of the embodiment performs warming control on steam heat exchanger equipment in cogeneration by designing necessary measurement and control equipment, reduces the working difficulty of operators, and improves the automation level of the system; meanwhile, the warm-up temperature of the system is accurately controlled, quantitative management of the equipment is realized, and the operation and maintenance level of the equipment is improved.
The technical solutions of the present invention are not limited to the above embodiments, and all technical solutions obtained by using equivalent substitution modes fall within the scope of the present invention.
Claims (10)
1. The utility model provides an automatic warm system of throwing of vapour heat exchanger which characterized in that: the steam-steam heat exchanger comprises a steam-steam heat exchanger body, and a hot side main pipeline and a cold side main pipeline which are connected to the steam-steam heat exchanger body, wherein the hot side main pipeline comprises a hot side inlet heating pipe and a hot side outlet heating pipe, and the cold side main pipeline comprises a cold side inlet heating pipe and a cold side outlet heating pipe;
the hot side inlet and the outlet heating pipe are respectively connected with a hot side heat supply steam extraction port and a hot side heat supply header interface, and the cold side inlet and the outlet heating pipe are respectively connected with a cold side heat supply steam extraction port and a cold side heat supply header interface;
the hot side main pipeline is provided with a hot side electric regulating valve, a hot side pipeline wall temperature monitoring device, a hot side pipeline drainage device, a hot side pipeline pressure measuring device and a hot side flow measuring device; the cold side main pipeline is provided with a cold side electric regulating valve, a cold side pipeline wall temperature monitoring device, a cold side pipeline drainage device, a cold side pipeline pressure measuring device and a cold side flow measuring device;
the hot side inlet is provided with a hot side warm pipe bypass, the hot side warm pipe bypass is provided with a hot side bypass control adjusting valve, the cold side inlet is provided with a cold side warm pipe bypass, and the cold side warm pipe bypass is provided with a cold side bypass control adjusting valve.
2. The automatic warming system of the steam-steam heat exchanger according to claim 1, characterized in that: the hot side electric regulating valve comprises a hot side inlet electric regulating valve arranged on the hot side inlet warm pipe, a hot side inlet electric stop valve and a hot side outlet electric stop valve arranged on the hot side outlet warm pipe.
3. The automatic warming system of the steam-steam heat exchanger according to claim 2, characterized in that: and the hot-side warm pipe bypass is spanned at two ends of the hot-side inlet electric stop valve.
4. The automatic warm-throw system of the steam-steam heat exchanger according to claim 3, characterized in that: the cold side electric regulating valve comprises a cold side inlet electric regulating valve arranged on the cold side inlet heating pipe, a cold side inlet electric stop valve and a cold side outlet electric stop valve arranged on the cold side outlet heating pipe.
5. The automatic warm-up system of the steam-steam heat exchanger according to claim 4, characterized in that: the cold side warm pipe bypass is arranged across the cold side inlet electric stop valve.
6. The automatic warming system of the steam-steam heat exchanger according to claim 5, characterized in that: the device for monitoring the wall temperature of the hot-side pipeline comprises a device for measuring the upper wall temperature of the hot-side inlet pipeline and a device for measuring the lower wall temperature of the hot-side inlet pipeline, which are arranged on the hot-side inlet warm pipe, and a device for measuring the upper wall temperature of the hot-side outlet pipeline and a device for measuring the lower wall temperature of the hot-side outlet pipeline, which are arranged on the hot-side outlet warm pipe.
7. The automatic warming system of the steam-steam heat exchanger according to claim 6, characterized in that: the cold side pipeline wall temperature monitoring device comprises a cold side inlet pipeline upper wall temperature measuring device and a cold side inlet pipeline lower wall temperature measuring device which are arranged on the cold side inlet warm pipe, and a cold side outlet pipeline upper wall temperature measuring device and a cold side outlet pipeline lower wall temperature measuring device which are arranged on the cold side outlet warm pipe.
8. The automatic warming system of the steam-steam heat exchanger according to claim 7, characterized in that: and two drainage pipelines are respectively arranged on the hot side inlet warm pipe, the hot side outlet warm pipe, the cold side inlet warm pipe and the cold side outlet warm pipe.
9. The automatic warming system of the steam-steam heat exchanger according to claim 8, wherein: each drainage pipeline is provided with a trigger drainage valve and a drainage manual valve.
10. The automatic warming system of the steam-steam heat exchanger according to claim 9, characterized in that: two paths of drain pipelines on the hot side inlet warm pipe are respectively arranged in front of the hot side inlet electric regulating valve and the hot side inlet electric stop valve; two paths of drain pipelines on the hot side outlet warm pipe are respectively arranged on two sides of the hot side outlet electric stop valve; two drainage pipelines on the cold side inlet warm pipe are respectively arranged in front of the cold side inlet electric regulating valve and the cold side inlet electric stop valve; two paths of drain pipelines on the cold side outlet warm pipe are respectively arranged on two sides of the cold side outlet electric stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021936629.4U CN212961798U (en) | 2020-09-07 | 2020-09-07 | Automatic warm system of throwing of vapour heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021936629.4U CN212961798U (en) | 2020-09-07 | 2020-09-07 | Automatic warm system of throwing of vapour heat exchanger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111947202A (en) * | 2020-09-07 | 2020-11-17 | 国电泉州热电有限公司 | Automatic warm system of throwing of vapour heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111947202A (en) * | 2020-09-07 | 2020-11-17 | 国电泉州热电有限公司 | Automatic warm system of throwing of vapour heat exchanger |
| CN111947202B (en) * | 2020-09-07 | 2024-03-29 | 国能(泉州)热电有限公司 | Automatic warm system of throwing of vapour heat exchanger |
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Address after: 362804 Kecuo village, Nanpu Town, Quangang District, Quanzhou City, Fujian Province Patentee after: Guoneng (Quanzhou) Thermal Power Co.,Ltd. Patentee after: Guoneng Nanjing electric power test and Research Co., Ltd Address before: 362804 Kecuo village, Nanpu Town, Quangang District, Quanzhou City, Fujian Province Patentee before: GUODIAN QUANZHOU THERMAL POWER Co.,Ltd. Patentee before: Guodian Nanjing electric power test and Research Co., Ltd |
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| CP01 | Change in the name or title of a patent holder |