CN214891445U - High-precision double-temperature control type steam-water heat exchange unit - Google Patents
High-precision double-temperature control type steam-water heat exchange unit Download PDFInfo
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- CN214891445U CN214891445U CN202121195227.8U CN202121195227U CN214891445U CN 214891445 U CN214891445 U CN 214891445U CN 202121195227 U CN202121195227 U CN 202121195227U CN 214891445 U CN214891445 U CN 214891445U
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Abstract
The utility model relates to a high accuracy temperature control type soda heat exchanger group. The heat exchanger comprises a primary net steam inlet pipeline, a primary net water return pipeline, a secondary net water inlet pipeline, a secondary net water return pipeline and a heat exchanger, wherein the primary end of the primary net steam inlet pipeline, the primary net water return pipeline and the heat exchanger is connected, the secondary end of the secondary net water inlet pipeline and the secondary net water return pipeline are connected with the secondary end of the heat exchanger, a three-way temperature control valve is installed on a secondary net water outlet pipe, a third valve port of the three-way temperature control valve is communicated with the secondary net water inlet pipe through a water pipe and a three-way pipe, a temperature sensor and a pressure sensor are installed on the secondary net water outlet pipe between the three-way temperature control valve and the heat exchanger, and a pressure sensor is installed on the water pipe. This application is owing to install tee bend temperature-sensing valve and decompression orifice plate in heat exchanger unit's secondary net side, realizes the temperature control of high accuracy, realizes the secondary control by temperature change of secondary net for the temperature of play water is more accurate. The method can be applied to the working condition with higher temperature requirement.
Description
Technical Field
The utility model belongs to the technical field of the soda heat exchanger unit is made in the design and specifically relates to a high accuracy dual temperature control type soda heat exchanger unit.
Background
The steam-water heat exchange unit is a device for converting heat of a primary network into industrial water and domestic water, has compact structure, high heat exchange efficiency, stable system operation and convenient construction, and is ideal heat exchange equipment at present.
In the conventional steam-water heat exchange unit, the inlet temperature of a primary net is usually about 140 ℃, the outlet temperature of a secondary net is about 60 ℃, and large heat exchange temperature difference can be generated on two sides. In actual operation, the outlet temperature of the secondary net fluctuates due to the change of the steam flow of the primary net. Or when the flow of the secondary network changes, the fluctuation of the outlet temperature of the secondary network can be caused when the flow of the primary network changes and is adjusted. Therefore, the traditional steam-water heat exchanger set is difficult to accurately control the temperature of the secondary network and cannot be applied to the working condition with high requirement on the temperature.
Disclosure of Invention
The utility model aims at providing a two temperature control type soda heat exchanger unit of high accuracy, this unit can make secondary network leaving water temperature more accurate, is applicable to the higher operating mode of requirement to the temperature.
The technical scheme of the utility model:
a high-precision double-temperature control type steam-water heat exchange unit comprises a primary net steam inlet pipeline, a primary net water outlet pipeline, a secondary net water inlet pipeline, a secondary net water outlet pipeline and a heat exchanger, wherein the primary net steam inlet pipeline, the primary net water outlet pipeline and the primary end of the heat exchanger are connected, and the secondary net water inlet pipeline and the secondary net water outlet pipeline are connected with the secondary end of the heat exchanger.
The primary net steam inlet pipeline is sequentially provided with a shut-off valve, a thermometer, a temperature sensor, a pressure gauge, a filter, a pressure gauge, a pressure sensor, a temperature control valve and a pressure gauge from a steam inlet;
the primary net water outlet pipeline is sequentially provided with a shut-off valve, a drain valve, a check valve, a shut-off valve, a bypass shut-off valve acting on the drain valve group, a pressure gauge, a temperature sensor, a thermometer and a shut-off valve from a condensed water outlet of the heat exchanger.
And the secondary net water outlet pipeline is sequentially provided with a temperature sensor, a pressure sensor, a three-way temperature control valve, a pressure sensor, a temperature sensor, a pressure gauge, a thermometer and a shutoff valve from a secondary water outlet of the heat exchanger.
The secondary net water inlet pipeline is sequentially provided with a shutoff valve, a pressure gauge, a filter, a pressure gauge, a water discharge bypass, a water replenishing bypass, a pressure transmitter, a water pump, a temperature sensor, a thermometer, a pressure gauge and a safety valve from a secondary water inlet.
And a third port of the three-way temperature control valve is communicated with a secondary network water inlet pipeline through a water pipe and a three-way valve, and a pressure reducing pore plate and a pressure sensor are arranged on the water pipe.
The utility model has the advantages that:
1. this application is at installation temperature-sensing valve on heat exchanger unit primary network admission pipe way, and when steam admission volume changed, through the temperature-sensing valve of primary network side, two-way regulation was carried out to secondary network export temperature of water, makes the export temperature more accurate.
2. This application is at heat exchanger unit's secondary net side-mounting tee bend temperature-sensing valve and decompression orifice plate, realizes the temperature control of high accuracy, realizes the secondary control by temperature change of secondary net, prevents that secondary net exit water temperature is higher than the required temperature for the temperature of play water is more accurate. The method can be applied to the working condition with higher temperature requirement. A pressure reducing pore plate is added in a lower pipeline of the three-way temperature control valve and is used for balancing water power.
3. This application can also improve the temperature of secondary network export through using the heat exchanger that heat transfer area is big, can eliminate the undulant minus tolerance influence of secondary network temperature. The outlet water temperature of the unit can be always kept in a stable state, so that the stability of the outlet temperature of the unit is achieved.
Drawings
FIG. 1 is a flow chart of the system of the present application.
Detailed Description
The present application is described in detail below with reference to the attached drawings.
A high-precision double-temperature control type steam-water heat exchange unit comprises a primary net steam inlet pipeline 1, a primary net water outlet pipeline 2, a secondary net water inlet pipeline 3, a secondary net water outlet pipeline 4 and a heat exchanger 5, wherein the primary net steam inlet pipeline 1, the primary net water outlet pipeline 2 and the primary end of the heat exchanger 5 are connected, and the secondary net water inlet pipeline 3 and the secondary net water outlet pipeline 4 are connected with the secondary end of the heat exchanger 5.
The primary-network steam inlet pipeline 1 is sequentially provided with a shut-off valve 6, a thermometer 7, a temperature sensor 8, a pressure gauge 9, a filter 10, the pressure gauge 9, a pressure sensor 11, an adjusting valve 12 and the pressure gauge 9 from a steam inlet.
The primary network water outlet pipeline 2 is sequentially provided with a drain valve group (a shut-off valve 6, a drain valve 13, a check valve 14 and a shut-off valve 6), a bypass shut-off valve 6 acting on the drain valve group, a pressure gauge 9, a temperature sensor 8, a thermometer 7 and a shut-off valve 6 from a condensed water outlet of a heat exchanger.
And the secondary network water outlet pipeline 4 is sequentially provided with a temperature sensor 8, a pressure sensor 11, a three-way temperature control valve 20, the pressure sensor 11, the temperature sensor 8, a pressure gauge 9, a thermometer 7 and a shut-off valve 6 from a secondary water outlet of the heat exchanger. Pressure sensors are respectively arranged on two sides of a water inlet of the three-way temperature control valve, so that the pressure drop condition can be observed in real time.
The secondary net water inlet pipeline 3 is sequentially provided with a shutoff valve 6, a pressure gauge 9, a filter 10, the pressure gauge 9, a water drainage bypass 15, a water supplementing bypass 16, a pressure transmitter 17, a water pump 18, a temperature sensor 8, a thermometer 7, the pressure gauge 9 and a safety valve 19 from a secondary water inlet.
And a third valve port of the three-way temperature control valve 20 is communicated with the secondary network water inlet pipeline 3 through a water pipe 21 and a three-way valve, and the water pipe 21 is provided with a pressure sensor 11. And a pressure reducing pore plate 22 is arranged on a water pipe 21 which is communicated between the three-way temperature control valve 20 and the secondary net water inlet pipeline for hydraulic balance.
The secondary net goes out the condition such as water temperature inaccuracy often appears among the prior art steam-water heat exchanger group, in order to solve secondary net play water temperature unstability problem, this application at first installs the temperature-sensing valve on primary net admission line, when steam flow production changes, can adjust secondary net play water temperature through the temperature-sensing valve. Secondly, a three-way temperature control valve is arranged between the water inlet and the water outlet of the secondary network of the heat exchanger unit and used for mixing cold water into the water outlet of the secondary network of the heat exchanger unit, so that secondary temperature adjustment is realized, and the water outlet temperature of the steam-water heat exchanger unit is more accurate. The secondary network pipeline is integrally insulated to isolate the influence of external temperature. The method can be applied to the working condition with higher temperature requirement.
Description of the embodiments and effects:
the working conditions of the conventional steam-water heat exchanger unit are as follows:
the temperature of the inlet and the outlet of the primary net is 140/40 ℃, the temperature of the inlet and the outlet of the secondary net heat exchanger is 30/60 ℃, in this case, because the temperature difference between the primary net and the secondary net is large, when the steam of the primary net is unstable and fluctuates, the temperature of the secondary net is difficult to stabilize at 60 ℃, and the secondary net has certain temperature fluctuation. Temperature fluctuations at + -5 deg.C are assumed.
The heat exchanger unit eliminates temperature influence caused by positive and negative temperature deviation through the following technical measures.
Elimination of negative bias effect:
when the temperature of the outlet water of the secondary network has negative deviation, the opening of the temperature control valve of the primary network is increased, so that the negative deviation influence of the temperature is eliminated. In addition, when the heat exchanger unit is manufactured, the heat exchange area of the heat exchanger is increased, the water temperature at the outlet of the secondary screen plate type heat exchanger is properly increased, for example, 70 ℃, and negative deviation heat exchange quantity is included. At this time, the outlet temperature of the plate heat exchanger is in the worst condition (-5 ℃ deviation), and the outlet temperature of the secondary net is still not lower than 65 ℃. Thereby eliminating the negative differential effect of temperature.
Elimination of positive bias effects:
the primary screen temperature control valve controls the positive deviation of the temperature, and a three-way temperature control valve is arranged at the outlet of the secondary screen plate type heat exchanger for secondary temperature control. The outlet water of the secondary net of the heat exchanger is mixed with the inlet water of the secondary net through the three-way temperature control valve, and the secondary temperature control is mainly realized through mixing water. The tee bend temperature-sensing valve direct action is in the water source of being adjusted for temperature regulation is more sensitive, and the temperature is more accurate, and secondary net export temperature is more stable.
Hydraulic balance
The lower end of the three-way temperature control valve is additionally provided with a pressure reduction pore plate. Because at the secondary network return water, the water of reposition of redundant personnel plate heat exchanger can be owing to produced the pressure drop through plate heat exchanger, and the pressure head of tee bend temperature control valve lower extreme can be higher than the pressure head that the board traded the export for tee bend temperature control valve both sides produce pressure differential, can lead to adjusting not accurate scheduling problem. In order to solve the problem, a pressure reducing pore plate is additionally arranged at the lower end of the three-way temperature control valve, so that the pressure drop of the plate heat exchanger is the same as the pressure drop of the pore plate, the hydraulic balance is realized, and the adjustment of the three-way temperature control valve is more accurate.
Claims (1)
1. The utility model provides a high accuracy dual temperature control type soda heat exchanger group which characterized in that: the heat exchanger comprises a primary net steam inlet pipeline (1), a primary net water outlet pipeline (2), a secondary net water inlet pipeline (3), a secondary net water outlet pipeline (4) and a heat exchanger (5), wherein the primary net steam inlet pipeline (1), the primary net water outlet pipeline (2) and the primary end of the heat exchanger (5) are connected, and the secondary net water inlet pipeline (3) and the secondary net water outlet pipeline (4) are connected with the secondary end of the heat exchanger (5);
the primary-network steam inlet pipeline (1) is sequentially provided with a shut-off valve (6), a thermometer (7), a temperature sensor (8), a pressure gauge (9), a filter (10), the pressure gauge (9), a pressure sensor (11), a temperature control valve (12) and the pressure gauge (9) from a steam inlet;
the primary network water outlet pipeline (2) is sequentially provided with a shut-off valve (6), a drain valve (13), a check valve (14), the shut-off valve (6), a bypass shut-off valve (6) acting on a drain valve group, a pressure gauge (9), a temperature sensor (8), a thermometer (7) and the shut-off valve (6) from a condensed water outlet of a heat exchanger;
the secondary network water outlet pipeline (4) is sequentially provided with a temperature sensor (8), a pressure sensor (11), a three-way temperature control valve (20), the pressure sensor (11), the temperature sensor (8), a pressure gauge (9), a thermometer (7) and a shut-off valve (6) from a secondary water outlet of the heat exchanger;
the secondary net water inlet pipeline (3) is sequentially provided with a shutoff valve (6), a pressure gauge (9), a filter (10), the pressure gauge (9), a water drainage bypass (15), a water supplementing bypass (16), a pressure transmitter (17), a water pump (18), a temperature sensor (8), a thermometer (7), the pressure gauge (9) and a safety valve (19) from a secondary water inlet;
and a third valve port of the three-way temperature control valve (20) is communicated with the secondary network water inlet pipeline (3) through a water pipe (21) and a three-way valve, and a pressure reducing pore plate (22) and a pressure sensor (11) are installed on the water pipe (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121195227.8U CN214891445U (en) | 2021-05-31 | 2021-05-31 | High-precision double-temperature control type steam-water heat exchange unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121195227.8U CN214891445U (en) | 2021-05-31 | 2021-05-31 | High-precision double-temperature control type steam-water heat exchange unit |
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| Publication Number | Publication Date |
|---|---|
| CN214891445U true CN214891445U (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121195227.8U Active CN214891445U (en) | 2021-05-31 | 2021-05-31 | High-precision double-temperature control type steam-water heat exchange unit |
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| Country | Link |
|---|---|
| CN (1) | CN214891445U (en) |
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2021
- 2021-05-31 CN CN202121195227.8U patent/CN214891445U/en active Active
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