CN104848285A - Temperature reduction combined type heating heat exchange unit - Google Patents
Temperature reduction combined type heating heat exchange unit Download PDFInfo
- Publication number
- CN104848285A CN104848285A CN201410575333.7A CN201410575333A CN104848285A CN 104848285 A CN104848285 A CN 104848285A CN 201410575333 A CN201410575333 A CN 201410575333A CN 104848285 A CN104848285 A CN 104848285A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- pipe
- steam
- desuperheat
- type heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a temperature reduction combined type heating heat exchange unit. The unit mainly consists of a tube shell type heat exchanger, a plate heat exchanger, a circulating pump, a water replenishment variable-frequency pump, a flow adjusting valve and a control cabinet, wherein the tube shell type heat exchanger is serially connected with the plate heat exchanger; a primary outlet of the tube shell type heat exchanger is provided with a steam temperature reducing pipe for connecting with a primary inlet of the plate heat exchanger; an emergent cutoff valve is mounted on the steam temperature reducing pipe; a secondary water return pipe of the plate heat exchanger is provided with a temperature reducing water distribution pipe for connecting with a secondary inlet of the tube shell type heat exchanger; a secondary water supply pipe of the plate heat exchanger is provided with a temperature reducing preheating pipe for connecting with a secondary outlet of the tube shell type heat exchanger; and the flow adjusting valve is mounted on the temperature reducing water distribution pipe. As the tube shell type heat exchanger is serially connected before the primary inlet of the plate heat exchanger for preheating and cooling, a high-temperature steam heat source is effectively prevented from directly entering the plate heat exchanger, the safe operation is guaranteed, the heating efficiency is improved, and the cost is reduced.
Description
Technical field
The present invention relates to heating technical field of heat exchange, specifically a kind of desuperheat combined type heating heat-exchange unit.
Background technology
Plate type heat exchanger, due to advantages such as compact conformation, heat transfer coefficient are high, easy to install, becomes the first-selected product of current heat exchange station heating, is widely used at present.But, due to the sealing strip cause of plate type heat exchanger, its heat resisting temperature less demanding in 150 DEG C and the highest must not more than 170 DEG C, otherwise will safety be jeopardized, but some cities and towns heat supply network provides thermal source great majority to be the high-temperature steam of more than 180 DEG C, this will strongly limit and use plate type heat exchanger in heating heat-exchange unit.
Summary of the invention
The object of the present invention is to provide a kind of be suitable for steam plate type heat exchanger and the desuperheat combined type that combines of shell-and-tube heat exchanger to heat heat-exchange unit.
The technical solution adopted for the present invention to solve the technical problems is: desuperheat combined type heating heat-exchange unit is primarily of shell-and-tube heat exchanger, plate type heat exchanger, circulating pump, moisturizing variable frequency pump, flow control valve and switch board composition, shell-and-tube heat exchanger is connected in series with plate type heat exchanger and arranges, an import of shell-and-tube heat exchanger is connected with steam pipe, and steam temperature-sensing valve steam pipe is equipped with, steam pipe was equipped with filter one before steam temperature-sensing valve, steam pipe is also provided with thermometer one, the once outlet of shell-and-tube heat exchanger is provided with steam temperature reducing pipe and is connected with an import of plate type heat exchanger, and shell-and-tube heat exchanger is provided with Pressure gauge, steam temperature reducing pipe is equipped with emergency shutdown valve, steam temperature reducing pipe was provided with temperature sensor before emergency shutdown valve, the once outlet of plate type heat exchanger is connected with condensed water discharge pipe, and on condensed water discharge pipe, steam trap is housed, condensed water discharge pipe was provided with thermometer two before steam trap, the secondary import of plate type heat exchanger is connected with secondary returning water pipe, secondary returning water pipe is equipped with filter two, secondary returning water pipe is equipped with circulating pump after filter two, secondary returning water pipe is after filter two, safety valve and pressure sensor one is equiped with before circulating pump, and be connected with filling pipe, filling pipe is equipped with moisturizing variable frequency pump, secondary returning water pipe is also connected with desuperheat sparge pipe after circulating pump, be connected with the secondary import of shell-and-tube heat exchanger by desuperheat sparge pipe again, the secondary outlet of plate type heat exchanger is connected with secondary water-supply pipe, and on secondary water-supply pipe, be provided with temperature control transmitter and pressure sensor two, secondary water-supply pipe is also provided with desuperheat economizer bank export with the secondary of shell-and-tube heat exchanger and be connected, desuperheat sparge pipe enters shell-and-tube heat exchanger preheating from the secondary returning water pipe water intaking after circulating pump, then import secondary water-supply pipe by desuperheat economizer bank to export, desuperheat sparge pipe is equipped with flow control valve, desuperheat sparge pipe is also equipped with voltage stabilizing balanced valve after flow control valve, at the highest point of shell-and-tube heat exchanger and desuperheat economizer bank, air bleeding valve is housed.
Described steam temperature-sensing valve, temperature sensor, emergency shutdown valve, pressure sensor one, circulating pump, moisturizing variable frequency pump, pressure sensor two, temperature control transmitter are connected with switch board wiring separately respectively with flow control valve.
Operation principle of the present invention is, first shell-and-tube heat exchanger carries out heat exchange desuperheat to the steam source that steam pipe is carried, plate type heat exchanger is entered again by steam temperature reducing pipe, a part of flow of secondary returning water pipe passes through desuperheat sparge pipe through Flow-rate adjustment valve regulation simultaneously, enter shell-and-tube heat exchanger after the effect of voltage stabilizing balanced valve and carry out preheating, and then import the output of secondary water-supply pipe by desuperheat economizer bank, be contained in the temperature control transmitters sense secondary water-supply pipe temperature on secondary water-supply pipe, and be provided with out water termostat value, the automatic steam regulation pipe of water termostat value that goes out being contained in the steam temperature-sensing valve foundation temperature control transmitter setting on steam pipe enters the flow of shell-and-tube heat exchanger to plate type heat exchanger, make secondary water-supply pipe temperature maintain all the time temperature control transmitter setting go out in water termostat value, the temperature sensor be contained on steam temperature reducing pipe detects the temperature that steam temperature reducing pipe enters plate type heat exchanger, and be provided with the highest protection temperature value, the highest protection temperature value being contained in the flow control valve foundation temperature sensor setting on desuperheat sparge pipe regulates its aperture automatically, until standard-sized sheet, within the temperature making steam temperature reducing pipe enter plate type heat exchanger remains at the highest protection temperature value of setting, thus play the effect of protection plate type heat exchanger, when temperature sensor detects that the temperature that steam temperature reducing pipe enters plate type heat exchanger exceeds the highest protection temperature value of setting, emergency shutdown valve is closed and is cut off the thermal source entering plate type heat exchanger, be contained in pressure sensor one on secondary returning water pipe for detecting circulating pump intake pressure, and be provided with moisturizing and open pump pressure force value, moisturizing steady pressure value and water deprivation stress value three control points, when detecting that circulating pump intake pressure opens pump pressure force value lower than the moisturizing that pressure sensor one sets, moisturizing variable frequency pump starts, and according to the moisturizing steady pressure value of setting, frequency-changing pressure stabilizing moisturizing is carried out to secondary returning water pipe, when moisturizing variable frequency pump runs, and secondary returning siphon pressure is stabilized in the moisturizing steady pressure value of setting, and when maintaining 30s ~ 60s, moisturizing variable frequency pump is shut down and is entered dormancy holding state, the moisturizing of moisturizing variable frequency pump terminates, when detect circulating pump intake pressure lower than setting water deprivation stress value and following time, secondary returning water pipe lack of water will be judged, circulating pump stoppage protection, when pump suction supply pressure to be recycled returns to the moisturizing steady pressure value of setting, circulating pump automatically starts and recovers normal condition.
The invention has the beneficial effects as follows, the present invention carries out preheating, cooling by serises connecting tube shell heat exchanger before a plate type heat exchanger import, efficiently avoid high-temperature steam thermal source and directly enters plate type heat exchanger, ensure that safe operation, improve heating efficiency simultaneously, reduce cost.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
In figure, 1, steam pipe, 2, filter one, 3, steam temperature-sensing valve, 4, thermometer one, 5, Pressure gauge, 6, shell-and-tube heat exchanger, 7, desuperheat economizer bank, 8, air bleeding valve, 9, steam temperature reducing pipe, 10, temperature sensor, 11, emergency shutdown valve, 12, plate type heat exchanger, 13, thermometer two, 14, steam trap, 15, condensed water discharge pipe, 16, secondary returning water pipe, 17, filter two, 18, safety valve, 19, pressure sensor one, 20, circulating pump, 21, desuperheat sparge pipe, 22, filling pipe, 23, moisturizing variable frequency pump, 24, pressure sensor two, 25, temperature control transmitter, 26, secondary water-supply pipe, 27, flow control valve, 28, voltage stabilizing balanced valve, 29, switch board.
Detailed description of the invention
With regard to accompanying drawing 1, desuperheat combined type heating heat-exchange unit of the present invention is described in detail below below.
As shown in Figure 1, desuperheat combined type heating heat-exchange unit of the present invention is primarily of shell-and-tube heat exchanger 6, plate type heat exchanger 12, circulating pump 20, moisturizing variable frequency pump 23, flow control valve 27 and switch board 29 form, shell-and-tube heat exchanger 6 is connected in series with plate type heat exchanger 12 and arranges, an import of shell-and-tube heat exchanger 6 is connected with steam pipe 1, and steam pipe 1 is equipped with steam temperature-sensing valve 3, steam pipe 1 was equipped with filter 1 before steam temperature-sensing valve 3, steam pipe 1 is also provided with thermometer 1, the once outlet of shell-and-tube heat exchanger 6 is provided with steam temperature reducing pipe 9 and is connected with an import of plate type heat exchanger 12, and shell-and-tube heat exchanger 6 is provided with Pressure gauge 5, steam temperature reducing pipe 9 is equipped with emergency shutdown valve 11, steam temperature reducing pipe 9 was provided with temperature sensor 10 before emergency shutdown valve 11, the once outlet of plate type heat exchanger 12 is connected with condensed water discharge pipe 15, and on condensed water discharge pipe 15, steam trap 14 is housed, condensed water discharge pipe 15 was provided with thermometer 2 13 before steam trap 14, the secondary import of plate type heat exchanger 12 is connected with secondary returning water pipe 16, secondary returning water pipe 16 is equipped with filter 2 17, secondary returning water pipe 16 is equipped with circulating pump 20 after filter 2 17, secondary returning water pipe 16 is after filter 2 17, safety valve 18 and pressure sensor 1 is equiped with before circulating pump 20, and be connected with filling pipe 22, filling pipe 22 is equipped with moisturizing variable frequency pump 23, secondary returning water pipe 16 is also connected with desuperheat sparge pipe 21 after circulating pump 20, be connected with the secondary import of shell-and-tube heat exchanger 6 by desuperheat sparge pipe 21 again, the secondary outlet of plate type heat exchanger 12 is connected with secondary water-supply pipe 26, and on secondary water-supply pipe 26, be provided with temperature control transmitter 25 and pressure sensor 2 24, secondary water-supply pipe 26 is also provided with desuperheat economizer bank 7 export with the secondary of shell-and-tube heat exchanger 6 and be connected, desuperheat sparge pipe 21 enters shell-and-tube heat exchanger 6 preheating from secondary returning water pipe 16 water intaking after circulating pump 20, then import secondary water-supply pipe 26 by desuperheat economizer bank 7 to export, desuperheat sparge pipe 21 is equipped with flow control valve 27, desuperheat sparge pipe 21 is also equipped with voltage stabilizing balanced valve 28 after flow control valve 27, at the highest point of shell-and-tube heat exchanger 6 and desuperheat economizer bank 7, air bleeding valve 8 is housed.
Described steam temperature-sensing valve 3, temperature sensor 10, emergency shutdown valve 11, pressure sensor 1, circulating pump 20, moisturizing variable frequency pump 23, pressure sensor 2 24, temperature control transmitter 25 are connected with switch board 29 wiring separately respectively with flow control valve 27.
Operation principle of the present invention is, first the steam source that shell-and-tube heat exchanger 6 pairs of steam pipes 1 are carried carries out heat exchange desuperheat, plate type heat exchanger 12 is entered again by steam temperature reducing pipe 9, a part of flow of secondary returning water pipe 16 is regulated through flow control valve 27 by desuperheat sparge pipe 21 simultaneously, voltage stabilizing balanced valve 28 enters shell-and-tube heat exchanger 6 after acting on and carries out preheating, and then import secondary water-supply pipe 26 by desuperheat economizer bank 7 and export, the temperature control transmitter 25 be contained on secondary water-supply pipe 26 detects secondary water-supply pipe 26 temperature, and be provided with out water termostat value, be contained in the automatic steam regulation pipe 1 of water termostat value that goes out that steam temperature-sensing valve 3 on steam pipe 1 sets according to temperature control transmitter 25 and enter the flow of shell-and-tube heat exchanger 6 to plate type heat exchanger 12, make secondary water-supply pipe 26 temperature maintain all the time temperature control transmitter 25 set go out in water termostat value, the temperature sensor 10 be contained on steam temperature reducing pipe 9 detects the temperature that steam temperature reducing pipe 9 enters plate type heat exchanger 12, and be provided with the highest protection temperature value, be contained in the highest protection temperature value that the flow control valve 27 on desuperheat sparge pipe 21 sets according to temperature sensor 10 and automatically regulate its aperture, until standard-sized sheet, within the temperature making steam temperature reducing pipe 9 enter plate type heat exchanger 12 remains at the highest protection temperature value of setting, thus play the effect of protection plate type heat exchanger 12, when temperature sensor 10 detects that the temperature that steam temperature reducing pipe 9 enters plate type heat exchanger 12 exceeds the highest protection temperature value of setting, the thermal source entering plate type heat exchanger 12 is closed and cut off to emergency shutdown valve 11, be contained in pressure sensor 1 on secondary returning water pipe 16 for detecting circulating pump 20 intake pressure, and be provided with moisturizing and open pump pressure force value, moisturizing steady pressure value and water deprivation stress value three control points, when detecting that circulating pump 20 intake pressure opens pump pressure force value lower than the moisturizing that pressure sensor 1 sets, moisturizing variable frequency pump 23 starts, and according to the moisturizing steady pressure value of setting, frequency-changing pressure stabilizing moisturizing is carried out to secondary returning water pipe 16, when moisturizing variable frequency pump 23 runs, and secondary returning water pipe 16 pressure stability is in the moisturizing steady pressure value of setting, and when maintaining 30s ~ 60s, dormancy holding state is shut down and entered to moisturizing variable frequency pump 23, moisturizing variable frequency pump 23 moisturizing terminates, when detect circulating pump 20 intake pressure lower than setting water deprivation stress value and following time, secondary returning water pipe 16 lack of water will be judged, circulating pump 20 stoppage protection, when pump 20 intake pressure to be recycled returns to the moisturizing steady pressure value of setting, circulating pump 20 automatically starts and recovers normal condition.
Claims (4)
1. a desuperheat combined type heating heat-exchange unit is primarily of shell-and-tube heat exchanger, plate type heat exchanger, circulating pump, moisturizing variable frequency pump, flow control valve and switch board composition, it is characterized in that, shell-and-tube heat exchanger is connected in series with plate type heat exchanger and arranges, an import of shell-and-tube heat exchanger is connected with steam pipe, the once outlet of shell-and-tube heat exchanger is provided with steam temperature reducing pipe and is connected with an import of plate type heat exchanger, steam temperature reducing pipe is equipped with emergency shutdown valve, steam temperature reducing pipe was provided with temperature sensor before emergency shutdown valve, the secondary import of plate type heat exchanger is connected with secondary returning water pipe, secondary returning water pipe is equipped with filter two, secondary returning water pipe is equipped with circulating pump after filter two, secondary returning water pipe is also connected with desuperheat sparge pipe after circulating pump, be connected with the secondary import of shell-and-tube heat exchanger by desuperheat sparge pipe again, the secondary outlet of plate type heat exchanger is connected with secondary water-supply pipe, and on secondary water-supply pipe, be provided with temperature control transmitter and pressure sensor two, secondary water-supply pipe is also provided with desuperheat economizer bank export with the secondary of shell-and-tube heat exchanger and be connected, desuperheat sparge pipe is equipped with flow control valve, desuperheat sparge pipe is also equipped with voltage stabilizing balanced valve after flow control valve.
2. desuperheat combined type heating heat-exchange unit according to claim 1, it is characterized in that, steam pipe is equipped with steam temperature-sensing valve, steam pipe was equipped with filter one before steam temperature-sensing valve, and steam pipe is also provided with thermometer one.
3. desuperheat combined type heating heat-exchange unit according to claim 1, it is characterized in that, the once outlet of plate type heat exchanger is connected with condensed water discharge pipe, and on condensed water discharge pipe, steam trap is housed, and condensed water discharge pipe was provided with thermometer two before steam trap.
4. desuperheat combined type heating heat-exchange unit according to claim 1, it is characterized in that, secondary returning water pipe is equiped with safety valve and pressure sensor one and is connected with filling pipe after filter two, before circulating pump, and filling pipe is equipped with moisturizing variable frequency pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410575333.7A CN104848285A (en) | 2014-10-25 | 2014-10-25 | Temperature reduction combined type heating heat exchange unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410575333.7A CN104848285A (en) | 2014-10-25 | 2014-10-25 | Temperature reduction combined type heating heat exchange unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104848285A true CN104848285A (en) | 2015-08-19 |
Family
ID=53848131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410575333.7A Pending CN104848285A (en) | 2014-10-25 | 2014-10-25 | Temperature reduction combined type heating heat exchange unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104848285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183791A (en) * | 2021-11-04 | 2022-03-15 | 淮北矿业股份有限公司 | Energy-saving heat exchange unit |
-
2014
- 2014-10-25 CN CN201410575333.7A patent/CN104848285A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183791A (en) * | 2021-11-04 | 2022-03-15 | 淮北矿业股份有限公司 | Energy-saving heat exchange unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201429477Y (en) | Testing device for water source heat pump unit | |
| CN201074826Y (en) | Flue gas/oil-fired boiler energy conservation equipment | |
| CN110500148A (en) | A kind of high back pressure heat supply of large turbine-generator set and monitoring method and system | |
| CN104848303A (en) | Intelligent heating heat supply station for heat exchange by steam heat source and condensed water recovery | |
| CN104296554B (en) | Condensing-type condenser of power station steam chest pumped vacuum systems | |
| CN104501275A (en) | Stepped heating and supplying system sufficiently utilizing waste heat of power plant | |
| CN204313382U (en) | Desuperheat combined type heating heat-exchange unit | |
| CN205351277U (en) | A back pressure steam turbine thermodynamic system for isolated network operation | |
| CN104848723A (en) | Tube plate composite heat exchanger unit | |
| CN209214399U (en) | Feed forward type hydrophobic side regulation heat exchange control system | |
| CN104848289A (en) | Efficient heat-supply heating heat-exchange unit adopting steam heat source | |
| CN104848285A (en) | Temperature reduction combined type heating heat exchange unit | |
| CN104848383A (en) | Self-adaption intelligent energy-saving heat exchange station | |
| CN104315496A (en) | Equal temperature difference principle-based boiler exhaust smoke waste heat recovery system | |
| CN204373030U (en) | Make full use of the step heating heating system of residual heat of electric power plant | |
| CN204704010U (en) | A kind of bootstrap system of distributed energy | |
| CN208154872U (en) | Hot water fall connect direct combustion dual effect type lithium bromide absorption type heat pump unit | |
| CN203810382U (en) | Switchable secondary reheat steam surface type desuperheater system of ultra-supercritical unit | |
| CN102635847A (en) | Water feeding system for multiple condensing boilers | |
| CN203533669U (en) | Combined heat exchanging machine unit | |
| CN104848304A (en) | Energy-saving and emission-reducing steam heat exchange station | |
| CN104848283A (en) | Heat exchange and recovery balancing device saving energy through waste heat of steam condensate | |
| CN102889576B (en) | Low-humidity steam double-effect heat exchange system | |
| CN204201868U (en) | A kind of boiler exhaust gas residual neat recovering system | |
| CN104848302A (en) | District heating system fully utilizing hot water to exchange heat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |
|
| WD01 | Invention patent application deemed withdrawn after publication |