CN211902829U - Low-low-temperature economizer system of supercritical coal-fired unit - Google Patents
Low-low-temperature economizer system of supercritical coal-fired unit Download PDFInfo
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- CN211902829U CN211902829U CN201922199051.2U CN201922199051U CN211902829U CN 211902829 U CN211902829 U CN 211902829U CN 201922199051 U CN201922199051 U CN 201922199051U CN 211902829 U CN211902829 U CN 211902829U
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Abstract
A low-temperature economizer system of a supercritical coal-fired unit comprises a sixth low inlet water inlet pipe, an eighth low inlet water taking pipe, a seventh low inlet water taking pipe, a sampling pipe, a water taking main pipe, a circulating pump inlet main pipe, a circulating pump outlet main pipe, a heat exchanger water inlet main pipe, a heat exchanger water outlet main pipe, a circulating pump A, a circulating pump B and a heat exchanger water inlet pipe; one end of the eighth low water inlet and taking pipe is connected with the eighth A low water inlet mother pipe and the eighth B low water inlet mother pipe, and one end of the seventh low water outlet and taking pipe is connected with the seventh A low water outlet mother pipe and the seventh B low water outlet mother pipe. Can follow the eighth low inlet and the seventh low outlet that adds of original supercritical coal-fired unit and get partial condensate water, and then utilize the flue gas condensate water to heat, can effectively utilize exhaust gas temperature, improve the thermal efficiency of boiler, reach energy-concerving and environment-protective effect. And the whole low-temperature economizer system can be effectively monitored and controlled, and the economical efficiency of the coal-fired unit is improved.
Description
Technical Field
The utility model relates to a boiler waste heat recovery field of discharging fume, concretely relates to low temperature economizer system of supercritical coal-fired unit.
Background
The coal-fired unit generally utilizes heat energy generated by coal combustion to heat water so as to generate steam to drive a steam turbine to do work, and the steam turbine drives a generator to generate electricity. The proportion of the heat loss of the exhaust gas of the supercritical coal-fired unit in all heat losses is large, and the exhaust gas temperature of the boiler is seriously deviated from a set value due to operation adjustment and coal blending combustion of a plurality of coal-fired units, so that the efficiency of the boiler is reduced, the generated energy per unit coal amount is reduced, the operation economy of the coal-fired units is directly influenced, and meanwhile, the energy conservation is not facilitated. The low-temperature economizer can effectively utilize the exhaust gas temperature of the boiler, improve the boiler efficiency and increase the economy of the coal-fired unit. How to give full play to the maximum benefit with low temperature economizer gain function promotes boiler efficiency, reduces exhaust gas temperature, and the observation and the control of each state of being convenient for again is this the problem that awaits the solution at present.
SUMMERY OF THE UTILITY MODEL
In view of above situation, in order to solve the problem that above-mentioned technique exists, the utility model provides a low temperature economizer system of supercritical coal-fired unit to obtain the low temperature economizer and exert the biggest benefit with the function and promote boiler efficiency, reduce exhaust gas temperature, and be convenient for the observation and the control of each state again.
A low-temperature economizer system of a supercritical coal-fired unit comprises a sixth low inlet water inlet pipe, an eighth low inlet water taking pipe, a seventh low inlet water taking pipe, a sampling pipe, a water taking main pipe, a circulating pump inlet main pipe, a circulating pump outlet main pipe, a heat exchanger water inlet main pipe, a heat exchanger water outlet main pipe, a circulating pump A, a circulating pump B and a heat exchanger water inlet pipe; one end of the eighth low feeding inlet water taking pipe is connected with the eighth A low feeding inlet mother pipe and the eighth B low feeding inlet mother pipe, and one end of the seventh low feeding outlet water taking pipe is connected with the seventh A low feeding outlet mother pipe and the seventh B low feeding outlet mother pipe; the other end of the eighth low water inlet and outlet water taking pipe and the other end of the seventh low water inlet and outlet water taking pipe are connected with one end of a water taking main pipe, one end of a circulating pump inlet main pipe is connected with a heat exchanger water outlet main pipe, the other end of the circulating pump inlet main pipe is connected with inlets of a circulating pump A and a circulating pump B, and outlets of the circulating pump A and the circulating pump B are connected with one end of a circulating pump outlet main pipe; the other end of the outlet main pipe of the circulating pump and the other end of the water taking main pipe are connected with a water inlet main pipe of the heat exchanger through a tee joint; one end of the heat exchanger water inlet pipe is connected with the heat exchanger water inlet main pipe, the other end of the heat exchanger water inlet pipe is connected with the heat exchanger inlet, the heat exchanger outlet is connected with one end of the heat exchanger water outlet pipe, and the other end of the heat exchanger water outlet pipe is connected with the heat exchanger water outlet main pipe; the one end that the sixth hangs down to add the export inlet tube links to each other with the sixth hangs down to add the export, and the one end that the sixth hangs down to add the entry inlet tube links to each other with the sixth hangs down to add the entry inlet tube, and the other end that the sixth hangs down to add the export inlet tube, the other end that the sixth hangs down to add the entry inlet tube all link to each other with heat exchanger outlet water mother pipe.
According to the low-temperature economizer system of the supercritical coal-fired unit, the sixth low inlet water inlet pipe and the sixth low inlet water inlet pipe are provided with the regulating valves.
According to the low temperature economizer system of supercritical coal-fired unit of this application, the seventh hangs down to add on the export intake pipe and has set gradually non-return valve, manual door, accent door and manual door from nearly seventh hangs down to add the export.
According to the low temperature economizer system of supercritical coal-fired unit of this application, the last back stop, manual door, accent door and the manual door of having set gradually from nearly eighth low access point department of access point on the eighth low access point intake pipe.
According to the low-temperature economizer system of the supercritical coal-fired unit, the water inlet pipe of the heat exchanger is provided with the adjusting door.
According to the application, the low temperature economizer system of supercritical coal-fired unit, be equipped with pressure sensing device on the female pipe of circulation pump entry, the female pipe of circulation pump export, the female pipe of heat exchanger water inflow, the female pipe of heat exchanger water outflow, pressure sensing device includes sampling tube and pressure transmitter, be equipped with one sample door on the sampling tube at least.
According to the low-temperature economizer system of the supercritical coal-fired unit, a heat exchanger water inlet main pipe, a heat exchanger water outlet pipe and a heat exchanger water inlet pipe are respectively provided with a flowmeter.
According to the low temperature economizer system of supercritical coal-fired unit of this application, be equipped with at least three temperature measurement component on heat exchanger water inlet main pipe, the heat exchanger mother pipe of giving out water respectively, heat exchanger oral siphon and heat exchanger outlet pipe are close to heat exchanger end and are equipped with at least one temperature measurement component respectively.
According to the low-low temperature economizer system of the supercritical coal-fired unit, the temperature measuring element is a thermal resistor or a thermocouple.
According to the low-temperature economizer system of the supercritical coal-fired unit, the adjusting door is an electric door or a pneumatic door.
According to the low-temperature economizer system of the supercritical coal-fired unit, the pressure transmitter can be a Rosemont pressure transmitter or an ABB pressure transmitter;
according to the low-temperature economizer system of the supercritical coal-fired unit, the number of the heat exchangers is at least four or multiple of four;
according to the application, the sixth is low to add the export inlet tube, the sixth is low to add the entry inlet tube, the seventh is low to add the export delivery intake pipe, the eighth is low to add the entry delivery intake pipe, the sampling tube, the female pipe of water delivery, the female pipe of pump delivery, the heat exchanger is intake female pipe, heat exchanger inlet tube, heat exchanger outlet pipe, the female pipe of heat exchanger play water all adopt 304 stainless steel pipes.
According to the low-temperature economizer system of the supercritical coal-fired unit, the flow meter adopts an ultrasonic flow meter or a pore plate flow meter.
After the technology provided by the utility model is adopted, according to the utility model discloses the low temperature economizer system of supercritical coal-fired unit has following beneficial effect.
1) Can follow the eighth low inlet and the seventh low outlet that adds of original supercritical coal-fired unit and get partial condensate water, and then utilize the flue gas condensate water to heat, can effectively utilize exhaust gas temperature, improve the thermal efficiency of boiler, reach energy-concerving and environment-protective effect. And valves, temperature measuring elements, pressure transmitters and flowmeters are arranged on the corresponding pipelines, so that the whole low-low temperature economizer system can be effectively monitored and controlled, and the economy of the coal-fired unit is improved.
Drawings
Fig. 1 shows a schematic structural diagram of a low-temperature economizer system of a supercritical coal-fired unit according to the utility model.
In the figure: 1. the water pump comprises a sixth low water inlet and outlet water inlet pipe (#6 low water inlet and outlet water inlet pipe), 2, a sixth low water inlet and outlet water inlet pipe (#6 low water inlet and outlet water inlet pipe), 3, a seventh low water inlet and outlet water taking pipe (#7 low water inlet and outlet water taking pipe), 4, an eighth low water inlet and outlet water taking pipe (#8 low water inlet and inlet water taking pipe), 5, an adjusting valve, 6, a check valve, 7, a manual valve, 8, a pressure transmitter, 9, a sampling valve, 10, a sampling pipe, 11, a tee joint, 12, a temperature measuring element, 13, a circulating pump A, 14, a circulating pump B, 15, a water taking main pipe, 16, a circulating pump outlet main pipe, 17, a circulating pump inlet main pipe, 18, a heat exchanger water inlet main pipe, 19, a flow meter, 20, a heat exchanger, 21, a heat exchanger water inlet pipe, 22, a heat exchanger water outlet pipe.
Detailed Description
Various preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The following description with reference to the accompanying drawings is provided to assist in understanding the exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist understanding, but they are to be construed as merely illustrative. Accordingly, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Also, in order to make the description clearer and simpler, a detailed description of functions and configurations well known in the art will be omitted.
As shown in fig. 1, a supercritical coal-fired unit low-temperature economizer system comprises a sixth low inlet water inlet pipe 1, a sixth low inlet water inlet pipe 2, an eighth low inlet water intake pipe 4, a seventh low inlet water intake pipe 3, a sampling pipe 10, a water intake main pipe 15, a circulation pump inlet main pipe 17, a circulation pump outlet main pipe 16, a heat exchanger water intake main pipe 18, a heat exchanger water outlet main pipe 23, a circulation pump a13, a circulation pump B14 and a heat exchanger water inlet pipe 21, wherein one end of the eighth low inlet water intake pipe 4 is connected with the eighth a low inlet main pipe and the eighth B low inlet main pipe, and one end of the seventh low inlet water intake pipe 3 is connected with the seventh a low inlet main pipe and the seventh B low inlet main pipe; the other end of the eighth low inlet water taking pipe 4 and the other end of the seventh low outlet water taking pipe 3 are connected with one end of a water taking main pipe 15, one end of a circulation pump inlet main pipe 17 is connected with a heat exchanger water outlet main pipe 23, the other end of the circulation pump inlet main pipe 17 is connected with inlets of a circulation pump A13 and a circulation pump B14, outlets of a circulation pump A13 and a circulation pump B14 are connected with one end of a circulation pump outlet main pipe 16, the other end of the circulation pump outlet main pipe 16 and the other end of the water taking main pipe 15 are connected with a heat exchanger water inlet main pipe 18 through a tee joint 11, one end of a heat exchanger water inlet pipe 21 is connected with the heat exchanger water inlet main pipe 18, the other end of the heat exchanger water inlet pipe 21 is connected with an inlet of a heat exchanger 20, an outlet of the heat exchanger 20 is connected with one end of a heat exchanger water outlet pipe 22, the other end of the heat exchanger water outlet pipe 22 is connected with the heat exchanger, one end of the sixth low inlet water inlet pipe 2 is connected with the sixth low inlet, and the other end of the sixth low inlet water inlet pipe 1 and the other end of the sixth low inlet water inlet pipe 2 are both connected with the heat exchanger water outlet main pipe 23.
The sixth low water inlet and outlet water inlet pipe 1 and the sixth low water inlet and outlet water inlet pipe 2 are provided with an adjusting door 5;
the seventh low water feeding outlet water taking pipe 3 is sequentially provided with a check valve 6, a manual valve 7, an adjusting valve 5 and a manual valve 7 from a position close to the seventh low water feeding outlet;
the water intake pipe 4 with the eighth low feeding port is sequentially provided with a check valve 6, a manual valve 7, an adjusting valve 5 and a manual valve 7 from the position close to the eighth low feeding port;
an adjusting door 5 is arranged on the heat exchanger water inlet pipe 21;
the pressure sensing device is arranged on the main inlet pipe 17 of the circulating pump, the main outlet pipe 16 of the circulating pump, the main inlet pipe 18 of the heat exchanger and the main outlet pipe 23 of the heat exchanger, the pressure sensing device comprises a sampling pipe 10 and a pressure transmitter 8, and at least one sampling door 9 is arranged on the sampling pipe 10 for safety.
The heat exchanger water inlet main pipe 18, the heat exchanger water outlet main pipe 23, the heat exchanger water outlet pipe 22 and the heat exchanger water inlet pipe 21 are all provided with a flowmeter 19;
the heat exchanger water inlet main pipe 18 and the heat exchanger water outlet main pipe 23 are respectively provided with at least three temperature measuring elements 12, and the ends, close to the heat exchanger 20, of the heat exchanger water inlet pipe 21 and the heat exchanger water outlet pipe 22 are respectively provided with at least 1 temperature measuring element 12.
Preferably, the temperature measuring element 12 may be a thermal resistor or a thermocouple;
preferably, the adjusting door 5 can be an electric door or a pneumatic door;
preferably, the pressure transmitter 8 can be a Rosemont or ABB pressure transmitter;
preferably, the number of the heat exchangers 20 is at least 4, or a multiple of 4;
preferably, the sixth low water inlet pipe 1, the sixth low water inlet pipe 2, the seventh low water inlet pipe 3, the eighth low water inlet pipe 4, the sampling pipe 10, the water taking main pipe 15, the circulating pump outlet main pipe 16, the circulating pump inlet main pipe 17, the heat exchanger water inlet main pipe 18, the heat exchanger water inlet pipe 21, the heat exchanger water outlet pipe 22 and the heat exchanger water outlet main pipe 23 are all made of 304 stainless steel pipes.
Preferably, the flow meter 19 is an ultrasonic flow meter or an orifice flow meter.
The sixth, seventh, eighth, etc. in this application represent sequence words that represent different pipelines, and are matched with the original supercritical coal-fired unit, so that corresponding sequence numbers are reserved, but do not represent any additional limitation besides. The sixth, seventh, eighth, etc. are denoted by #6, #7, #8, etc. in the drawings.
Compared with the prior art, the beneficial effects of this application are: this system can be followed the eighth low inlet and the seventh low outlet that adds of original supercritical coal-fired unit and get partial condensate water, and then utilizes the flue gas condensate water to heat, can effectively utilize exhaust gas temperature, improves the thermal efficiency of boiler, reaches energy-concerving and environment-protective effect. And valves, temperature measuring elements, pressure transmitters and flowmeters are arranged on the corresponding pipelines, so that the whole low-low temperature economizer system can be effectively monitored and controlled, and the economy of the coal-fired unit is improved.
The present invention has been described in detail, and the principle and the implementation of the present invention have been explained by using specific examples, and the explanation of the above examples is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented. Of course, the above listed cases are only examples, and the present invention is not limited thereto. It should be understood by those skilled in the art that other variations or simplifications according to the technical solution of the present invention may be appropriately applied to the present invention, and should be included in the scope of the present invention.
Claims (10)
1. The low-temperature economizer system of the supercritical coal-fired unit is characterized by comprising a sixth low inlet water inlet pipe (1), a sixth low inlet water inlet pipe (2), an eighth low inlet water taking pipe (4), a seventh low inlet water taking pipe (3), a sampling pipe (10), a water taking main pipe (15), a circulating pump inlet main pipe (17), a circulating pump outlet main pipe (16), a heat exchanger water inlet main pipe (18), a heat exchanger water outlet main pipe (23), a circulating pump A (13), a circulating pump B (14) and a heat exchanger water inlet pipe (21); one end of the eighth low feeding inlet water taking pipe (4) is connected with the eighth A low feeding inlet mother pipe and the eighth B low feeding inlet mother pipe, and one end of the seventh low feeding outlet water taking pipe (3) is connected with the seventh A low feeding outlet mother pipe and the seventh B low feeding outlet mother pipe; the other end of the eighth low inlet water taking pipe (4) and the other end of the seventh low outlet water taking pipe (3) are connected with one end of a water taking main pipe (15), one end of a circulating pump inlet main pipe (17) is connected with a heat exchanger water outlet main pipe (23), the other end of the circulating pump inlet main pipe (17) is connected with inlets of a circulating pump A (13) and a circulating pump B (14), and outlets of the circulating pump A (13) and the circulating pump B (14) are connected with one end of a circulating pump outlet main pipe (16); the other end of the outlet main pipe (16) of the circulating pump and the other end of the water taking main pipe (15) are connected with a water inlet main pipe (18) of the heat exchanger through a tee joint (11); one end of the heat exchanger water inlet pipe (21) is connected with the heat exchanger water inlet main pipe (18), the other end of the heat exchanger water inlet pipe (21) is connected with an inlet of the heat exchanger (20), an outlet of the heat exchanger (20) is connected with one end of the heat exchanger water outlet pipe (22), and the other end of the heat exchanger water outlet pipe (22) is connected with the heat exchanger water outlet main pipe (23); the one end that the sixth hangs down to add export inlet tube (1) links to each other with the sixth hangs down to add the export, and the one end that the sixth hangs down to add entry inlet tube (2) links to each other with the sixth hangs down to add the inlet, and the other end that the sixth hangs down to add export inlet tube (1), the other end that the sixth hangs down to add entry inlet tube (2) all link to each other with heat exchanger play water mother pipe (23).
2. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein the sixth low temperature inlet water inlet pipe (1) and the sixth low temperature inlet water inlet pipe (2) are provided with a damper (5).
3. The supercritical coal-fired unit low-temperature economizer system according to claim 1, wherein a check valve (6), a manual valve (7), an adjusting valve (5) and the manual valve (7) are sequentially arranged on the seventh low-pressure feeding outlet water intake pipe (3) from a position close to the seventh low-pressure feeding outlet.
4. The supercritical coal-fired unit low-temperature economizer system according to claim 1, wherein a check valve (6), a manual valve (7), an adjusting valve (5) and the manual valve (7) are arranged on the eighth low inlet water intake pipe (4) in sequence from a position close to the eighth low inlet.
5. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein the heat exchanger water inlet pipe (21) is provided with a damper (5).
6. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein pressure sensing devices are arranged on the pump inlet main pipe (17), the pump outlet main pipe (16), the heat exchanger water inlet main pipe (18) and the heat exchanger water outlet main pipe (23), the pressure sensing devices comprise a sampling pipe (10) and a pressure transmitter (8), and at least one sampling gate (9) is arranged on the sampling pipe (10).
7. The supercritical coal-fired unit low temperature economizer system according to claim 1, wherein the heat exchanger water inlet header (18), the heat exchanger water outlet header (23), the heat exchanger water outlet pipe (22) and the heat exchanger water inlet pipe (21) are respectively provided with a flow meter (19).
8. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein the heat exchanger water inlet header (18) and the heat exchanger water outlet header (23) are respectively provided with at least three temperature measuring elements (12), and the ends of the heat exchanger water inlet pipe (21) and the heat exchanger water outlet pipe (22) close to the heat exchanger (20) are respectively provided with at least one temperature measuring element (12).
9. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein the heat exchanger (20) is provided with at least four or a multiple of four.
10. The supercritical coal-fired unit low temperature economizer system according to claim 1 wherein the sixth low inlet water inlet pipe (1), the sixth low inlet water inlet pipe (2), the seventh low inlet water taking pipe (3), the eighth low inlet water taking pipe (4), the sampling pipe (10), the water taking main pipe (15), the circulating pump outlet main pipe (16), the circulating pump inlet main pipe (17), the heat exchanger water inlet main pipe (18), the heat exchanger water inlet pipe (21), the heat exchanger water outlet pipe (22) and the heat exchanger water outlet main pipe (23) are all 304 stainless steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199051.2U CN211902829U (en) | 2019-12-10 | 2019-12-10 | Low-low-temperature economizer system of supercritical coal-fired unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922199051.2U CN211902829U (en) | 2019-12-10 | 2019-12-10 | Low-low-temperature economizer system of supercritical coal-fired unit |
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| Publication Number | Publication Date |
|---|---|
| CN211902829U true CN211902829U (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922199051.2U Expired - Fee Related CN211902829U (en) | 2019-12-10 | 2019-12-10 | Low-low-temperature economizer system of supercritical coal-fired unit |
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| Country | Link |
|---|---|
| CN (1) | CN211902829U (en) |
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2019
- 2019-12-10 CN CN201922199051.2U patent/CN211902829U/en not_active Expired - Fee Related
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Granted publication date: 20201110 Termination date: 20211210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |