CN203296838U - Heating furnace flue gas and steam waste heat recovery and power generation system - Google Patents
Heating furnace flue gas and steam waste heat recovery and power generation system Download PDFInfo
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- CN203296838U CN203296838U CN2013203540619U CN201320354061U CN203296838U CN 203296838 U CN203296838 U CN 203296838U CN 2013203540619 U CN2013203540619 U CN 2013203540619U CN 201320354061 U CN201320354061 U CN 201320354061U CN 203296838 U CN203296838 U CN 203296838U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 99
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000003546 flue gas Substances 0.000 title claims abstract description 91
- 238000010438 heat treatment Methods 0.000 title claims abstract description 60
- 238000010248 power generation Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 238000001816 cooling Methods 0.000 claims abstract description 66
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 27
- 238000001704 evaporation Methods 0.000 claims abstract description 15
- 230000008020 evaporation Effects 0.000 claims abstract description 15
- 238000009834 vaporization Methods 0.000 claims description 30
- 230000008016 vaporization Effects 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
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- 230000008859 change Effects 0.000 description 4
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- 238000011161 development Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012806 monitoring device Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model relates to a heating furnace flue gas and steam waste heat recovery and power generation system. The system comprises a flue gas waste heat boiler system, a heating furnace evaporation cooling system, a steam turbine generator unit system, a condensation-water return water supply system and a combination control system. The flue gas waste heat boiler system comprises an economizer, an evaporator and a superheater. The evaporation cooling system is fed with water from the economizer of a heating furnace, and generated saturated steam enters the super heater of the heating furnace to be superheated. Aiming for running characteristics of the heating furnace, heating furnace flue gas and evaporation cooling steam are utilized and developed uniformly to realize combined flue gas and steam evaporation waste heat power generation. Waste heat of the flue gas and the evaporation cooling saturated steam is utilized, system stability is guaranteed excellently, and the waste heat is utilized to the utmost extent.
Description
Technical Field
The utility model relates to a metallurgical technology especially relates to steel mill steel rolling heating furnace's waste heat recovery utilizes technique.
Background
The heating furnace is an energy-consuming large household in iron and steel enterprises, and has high energy consumption and low energy utilization level. At present, technical transformation and upgrading are carried out on heating furnaces by a plurality of enterprises, so that energy conservation and emission reduction are realized. The method mainly adopts the way that a waste heat boiler is arranged in a flue at the tail part of a heating furnace, and steam generated by the boiler is utilized to generate electricity. For example, patent No. ZL201010114344.7 entitled "heating furnace waste heat power generation system and method" is to add a supplementary combustion waste heat boiler as a main body of the system, to ensure a certain amount of steam and to absorb the fluctuation of flue gas to achieve the stability of the system. This waste heat recovery does use part of the heat energy, but it also has some problems. Such as: only part of the heat of the flue gas is recovered, and the waste heat recovery and utilization capacity is limited; under the condition that the output of the heating furnace is unstable, the stability of the smoke amount cannot be ensured, so that the continuous and stable operation of the waste heat power generation system cannot be ensured. When the flue gas waste heat boiler is out of operation, the system is equivalent to a small thermal power plant, which is forbidden by the national regulations. The energy-saving effect generated by the operation of the waste heat boiler is partially offset due to the lower system parameters (relative to a large-scale thermal power plant).
Disclosure of Invention
The utility model aims at providing a heating furnace flue gas, steam waste heat recovery power generation system can accomplish heat furthest's recycle, can solve the problem of waste heat power generation system continuous stable operation again.
In order to realize the purpose of the utility model, the technical scheme who proposes as follows:
a heating furnace flue gas and steam waste heat recovery power generation system comprises a flue gas waste heat boiler system, a heating furnace vaporization cooling system, a turbine generator set system, a condensed water return water supply system and a combined control system;
the flue gas waste heat boiler system comprises a flue gas waste heat boiler 1, a flue gas waste heat boiler drum 5 and a flue gas waste heat boiler drum water supply regulating valve 17, wherein the flue gas waste heat boiler 1 is composed of a superheater 2, an evaporator 3 and an economizer 4;
the heating furnace vaporization cooling system comprises a vaporization cooling steam drum 6, a heating furnace water beam vaporization cooling loop 7, a vaporization cooling forced circulation pump 8 and a vaporization cooling steam drum water supply regulating valve 16;
the steam turbine generator unit comprises a steam turbine 9 and a generator 10; wherein,
the flue gas of the main exhaust flue of the heating furnace is subjected to heat exchange sequentially through the superheater 2, the evaporator 3 and the economizer 4 and then is exhausted into the atmosphere;
the condensed water return supply system is respectively connected with a steam turbine 9 of the steam turbine generator unit and an inlet of the economizer 4, and condensed water generated by the steam turbine 9 is sent into the economizer 4;
the outlet of the economizer 4 is respectively connected with a flue gas waste heat boiler steam drum 5 and a vaporization cooling steam drum 6, and heated condensed water is respectively sent to the flue gas waste heat boiler steam drum 5 and the vaporization cooling steam drum 6;
the flue gas waste heat boiler steam drum 5 is connected with the inlet of the evaporator 3 through a downcomer, and the outlet of the evaporator 3 is connected back to the flue gas waste heat boiler steam drum 5; a steam pipeline of the flue gas waste heat boiler steam drum 5 is connected with an inlet of the superheater 2; the unsaturated water absorbs the heat of the flue gas of the evaporator 3 and is changed into a steam-water mixture, after steam-water separation is carried out on a flue gas waste heat boiler steam drum 5, saturated water enters the next cycle, and saturated steam enters the superheater 2;
the evaporative cooling steam pocket 6 is connected with a water beam evaporative cooling loop 7 of the heating furnace through a descending pipeline and an evaporative cooling forced circulation pump 8 to form a circulation loop, saturated water enters the water beam evaporative cooling loop 7 of the heating furnace, is changed into a steam-water mixture and then is sent back to the evaporative cooling steam pocket 6 for steam-water separation, the saturated water enters the next circulation, and saturated steam enters the superheater 2;
the outlet of the superheater 2 is connected with a steam turbine 9 of a steam turbine generator set, and the superheater 2 provides superheated steam for the steam turbine 9.
The condensed water return water supply system comprises a condenser 11, a condensed water pump 12, a thermal deaerator 13 and a boiler feed water pump 14; the condenser 11 is connected with the steam turbine 9, exhaust steam after acting is condensed into condensed water, the condensed water is sent to the thermal deaerator 13 through the condensed water pump 12, the condensed water is pumped by the steam turbine 9 and heated to realize thermal deaerating, and then enters the water feed pump 14 to be pressurized and then is sent to the economizer 4 to complete thermal circulation.
The combined control system comprises a flue gas waste heat boiler water supply regulating valve 17 which is arranged on a water supply pipeline from the outlet of the economizer 4 to the flue gas waste heat boiler steam drum 5; the water supply regulating valve 16 of the evaporative cooling steam pocket is arranged on a water supply pipeline from the outlet of the economizer 4 to the evaporative cooling steam pocket 6; the combined control system adjusts and controls the opening of the two regulating valves according to the water levels of the two steam drums, the main steam flow and the water supply flow of the steam drums, so that the water level of the steam drums is stable and the two steam drums run in parallel.
The utility model discloses with the unified development and utilization of heating furnace flue gas and vaporization cooling steam, realize flue gas, the joint evaporation waste heat power generation of steam. The waste heat of the flue gas is utilized, and the waste heat of the vaporized cooling saturated steam is utilized, so that the waste heat is utilized to the maximum extent.
The utility model discloses do not influence the original production technology of heating furnace, will add whole steam of gas exhaust-heat boiler output and be used for the electricity generation, furthest's utilization waste heat adapts to heating furnace operating mode change requirement, has improved the generated energy, has both retrieved these waste heat and soft water resource, can also reduce the factory power consumption, reduces product cost, has good social and economic benefits.
Drawings
FIG. 1 is a schematic view of the flue gas and steam waste heat recovery power generation system of the heating furnace of the present invention.
Wherein
1 flue gas waste heat boiler 10 generator
2 superheater 11 condenser
3 evaporator 12 condensate pump
4 economizer 13 thermal deaerator
5 flue gas waste heat boiler steam pocket 14 boiler feed water pump
6-vaporization cooling steam drum 15 combined control system
7 heating furnace water beam vaporization cooling loop 16 vaporization cooling steam pocket water supply regulating valve
8 vaporization cooling forced circulation pump 17 flue gas waste heat boiler drum feed water regulating valve
9 steam turbine
T, P and F are temperature sensor, pressure sensor and flow sensor, respectively
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a system mainly includes flue gas exhaust-heat boiler 1, over heater 2, evaporimeter 3, economizer 4, flue gas exhaust-heat boiler steam pocket 5, evaporative cooling steam pocket 6, heating furnace water beam evaporative cooling return circuit 7, evaporative cooling forced circulation pump 8, steam turbine 9, generator 10, condenser 11, condensate pump 12, heating power oxygen-eliminating device 13, boiler feed water pump 14, combined control system 15, evaporative cooling steam pocket water supply regulating valve 16, flue gas exhaust-heat boiler steam pocket water supply regulating valve 17 etc..
The system introduces the flue gas with the temperature of 400-. Enters a chimney through a draught fan and is discharged into the atmosphere.
The heating furnace flue gas and steam waste heat recovery power generation system of the system has the following processes: the thermal deaerator 13 generates deaerated water, the deaerated water is pressurized by a boiler water feed pump 14 and then is sent into an economizer 4 of the flue gas waste heat boiler 1 to absorb flue gas waste heat in a low-temperature region, the deaerated water is heated to a certain temperature and then is respectively sent into a flue gas waste heat boiler steam pocket 5 and a vaporization cooling steam pocket 6, unsaturated water in the flue gas waste heat boiler steam pocket 5 enters an evaporator 3 through a descending pipe, flue gas heat is absorbed in the evaporator 3 to become a steam-water mixture and then is sent into the steam pocket 5, after steam-water separation is carried out in the steam pocket 5, the saturated water enters the next cycle, and saturated steam enters the superheater 2. Saturated water in the evaporative cooling steam drum 6 enters a water beam evaporative cooling loop 7 of the heating furnace through an evaporative cooling forced circulation pump 8, absorbs heat, becomes a steam-water mixture, and then is sent back to the evaporative cooling steam drum 6, after steam-water separation is carried out in the steam drum 6, the saturated water enters the next circulation, and the saturated steam generated by the flue gas waste heat boiler steam drum 5 enter the superheater 2 together. The flue gas is uniformly heated into superheated steam by the superheater 2 of the flue gas waste heat boiler 1. The superheated steam enters the turbine 9 to do work, and drives the generator 10 to generate electricity. The exhaust steam after acting enters a condenser 11 to be condensed into condensed water, the condensed water is sent to a thermal deaerator 13 through a condensed water pump 12, and thermal deaerating is realized through air exhaust and heating of a steam turbine. Qualified deoxygenated water enters a boiler feed pump 14 to complete thermodynamic cycle.
Softened water required by the waste heat power generation system is supplied by return water of condensed water of the system. The system water supplement is supplied by the chemical water treatment system.
The combined control system 15 comprises a flue gas boiler waste heat furnace steam drum water supply regulating valve 17 which is arranged on a water supply pipeline from the outlet of the economizer 4 to the flue gas waste heat boiler steam drum 5; the water supply regulating valve 16 of the evaporative cooling steam pocket is arranged on a water supply pipeline from the economizer 4 to the evaporative cooling steam pocket 6; the combined control system 15 adjusts and controls the opening of the water supply regulating valves 16 and 17 according to the water level of the steam drum, the steam flow at the outlet of the steam drum and the water supply flow of the steam drum, so as to ensure the water level of the steam drum to be stable and solve the problem of parallel operation of the two steam drums.
The utility model discloses with the unified development and utilization of heating furnace flue gas and vaporization cooling steam, realize flue gas, the joint evaporation waste heat power generation of steam. The waste heat of the flue gas is utilized, and the waste heat of the vaporized cooling saturated steam is utilized, so that the waste heat is utilized to the maximum extent.
When the heating furnace is in full-load operation, the increase range of the smoke gas quantity and the vaporization cooling evaporation quantity of the heating furnace is small, so that the smoke gas waste heat boiler and the steam turbine generator unit are provided with margins during design, and the requirement of the working condition change of the heating furnace can be met.
The evaporative cooling steam is introduced, and the characteristic that the evaporative cooling steam is relatively stable is utilized, so that the influence of the large fluctuation of the waste heat of the flue gas on the stable operation of the waste heat power generation system is effectively relieved, and the long-term safe and stable operation of the waste heat power generation system is ensured.
The heating furnace flue gas and steam waste heat recovery power generation system carries out long-term tracking and research on the operation parameters of the flue gas and the vaporization cooling device, small experiments are carried out, a set of effective adjustment waste heat power generation system and a control method are developed and applied to an automatic waste heat power generation control system, and the operation stability of the system is reliably guaranteed.
The utility model discloses a main innovation point is:
1. when the heating furnace is to be rolled, the fuel consumption and the flue gas amount are only about 15% of the normal amount and are only used for keeping the temperature of the hearth, at the moment, the steam amount of the flue gas waste heat boiler is greatly reduced, and the power generation system cannot normally operate only by using the flue gas waste heat boiler. The utility model discloses combine heating furnace vaporization cooling and flue gas exhaust-heat boiler, utilize the heating furnace to keep warm necessary cooling vapour volume (20t/h-30t/h) as the stable basis vapour volume of system, and flue gas exhaust-heat boiler mainly used steam is overheated, and the flue gas volume is less when solving the heating furnace and waiting to roll, the discontinuous problem of steam volume. And an additional afterburning waste heat boiler is not needed.
For example, the smoke amount of 74500Nm when a certain steel mill heating furnace normally works3And h, the inlet temperature of the waste heat boiler flue gas is 440 ℃, and the outlet temperature is 150 ℃. In the case of power generation using only furnace flue gas without using evaporative cooling saturated steam, the data is as follows:
when the heating furnace normally works, the steam flow of the flue gas waste heat boiler is 13.5 t/h;
when the heating furnace is to be rolled, the smoke gas amount is 11200Nm3And h, the steam flow of the flue gas waste heat boiler is 2 t/h.
Under the two conditions, the minimum value of the steam flow is 2t/h, the maximum value is 13.5t/h, the steam flow of the minimum value is only 15% of the maximum value, and the huge flow difference cannot be borne by any steam turbine generator unit.
After the saturated steam and the flue gas waste heat boiler are cooled by vaporization of the heating furnace, the data are as follows:
when the heating furnace normally works, the steam flow of the flue gas waste heat boiler is 13.5t/h, the flow of the evaporative cooling saturated steam is 20t/h-30t/h, and the total steam flow is 33.5t/h-43.5 t/h;
when the heating furnace is to be rolled, the steam flow of the flue gas waste heat boiler is 2t/h, the flow of the evaporative cooling saturated steam is 20t/h-30t/h, and the total steam flow is 22t/h-32 t/h;
under the two conditions, the minimum value of the total steam flow is 22t/h, the maximum value is 43.5t/h, the minimum value of the total steam flow is 51 percent of the maximum value, and the steam turbine can be ensured to normally and stably operate within the range.
2. Because the flue gas waste heat boiler is a natural circulation boiler and the heating furnace vaporization cooling system is a forced circulation evaporation system, the parallel operation of the flue gas waste heat boiler and the forced circulation evaporation system has higher technical difficulty. According to development and operation experiences of a system in the field of cement waste heat power generation for many years, a solution is provided aiming at the fluctuation characteristics of the thermal condition of the heating furnace, so that the water levels of the vaporization cooling steam drum and the flue gas waste heat boiler steam drum are well controlled, and the continuous and stable operation of a power generation system is ensured.
The water level monitoring devices are arranged on the left side and the right side of the steam drum at symmetrical positions, and the average value of the two monitoring values is used as a calculation input value of the water level of the steam drum in program setting, so that the accuracy of the numerical value is ensured.
Secondly, according to the current pressure of the steam drum, pressure compensation is carried out on the steam drum water level signal according to a compensation formula so as to eliminate the influence of pressure change on the accuracy of the water level signal. The pressure compensation formula is as follows:
h＝[L(ρ1-ρ3)g-ΔP]/(ρ2-ρ3)g-h0
wherein: h: the drum water level m after pressure compensation;
l: the height difference m between the two sampling tubes of the balance container;
ρ1: density of condensed water, kg/m3；
ρ2: density of saturated water, kg/m3；
ρ3: saturated steam density, kg/m3；
g: acceleration of gravity, m/s2；
Δ P: differential pressure, Pa;
h0: the height m from the zero point of the water level of the steam drum to the lower sampling tube;
and after the combined control system calculates and analyzes the three impulse signals of the steam drum water level signal, the steam drum outlet steam flow and the steam drum water supply flow, a control signal is given out, the opening degree of the water supply valve is controlled, the accuracy of the instruction is ensured, and the normal water level of the steam drum is ensured.
Setting a fixed value of a steam drum water level in the system, reading a steam flow value at the steam drum outlet and a steam drum water supply flow value when the steam drum water level is higher than the fixed value, and not operating if the steam flow at the steam drum outlet is greater than the water supply flow at the moment; if the steam flow at the outlet of the steam drum is less than or equal to the water supply flow of the steam drum, the system gives an action signal, the opening of the water supply regulating valve is reduced, and the water level of the steam drum is gradually reduced; when the water level is reduced to a low fixed value, the system reads the steam flow at the outlet of the steam drum and the water supply flow value of the steam drum, and if the steam flow at the outlet of the steam drum is smaller than the water supply flow, the system does not act; if the steam flow at the outlet of the steam drum is more than or equal to the water supply flow of the steam drum, the system gives an action signal, the opening of the water supply regulating valve is increased, and the water level of the steam drum is gradually increased. When the water level of the steam drum is between the high and low fixed values, the system is in a stable balance state at the moment.
Fourthly, pressure compensation and temperature compensation are carried out on steam flow signals at the steam drum outlet, and the influence of pressure change on the accuracy of the flow signals is eliminated.
Wherein: m: steam pressure after pressure compensation and temperature compensation, Pa;
k: a constant;
Δ P: differential pressure, Pa;
t: the temperature of the steam at the outlet of the steam drum is lower than the temperature of the steam at the outlet of the steam drum;
p: steam pressure at the outlet of the steam drum, Pa;
3. because the vaporization cooling of the heating furnaces is used as a basic heat source of the system, an additional afterburning boiler is not needed, the selection of system parameters needs to be optimized according to experiments and operation experience, and the parameters need to be optimized in a targeted manner because the thermal conditions of each heating furnace are different. According to theoretical calculation and empirical correction, parameters of a waste heat boiler, a steam turbine and other host machines and target parameters of an automatic control system are optimized, so that safe, stable and efficient operation of the system is guaranteed.
For example 74500Nm of flue gas volume of certain steel mill heating furnace3And h, the inlet temperature of the waste heat boiler flue gas is 440 ℃, the outlet temperature is 150 ℃, and the flow rate of the evaporative cooling saturated steam is 20t/h-30 t/h. It can be seen from the following table that when the main steam pressure is selected to be optimized to be 1.25MPa, the waste heat is more fully utilized, and the output power of the generator is maximum.
| Main steam pressure | MPa | 1.0 | 1.25 | 1.35 |
| Temperature of main steam | ℃ | 325 | 325 | 325 |
| Main steam flow | t/h | 34.2 | 33.5 | 32.3 |
| Temperature of feed water | ℃ | 104 | 104 | 104 |
| Flow of vaporized saturated steam | t/h | 20.4 | 20 | 19.5 |
| Steam flow of flue gas waste heat boiler | t/h | 13.8 | 13.5 | 12.8 |
| Output power of generator | kW | 8190 | 8300 | 8210 |
4. On the premise of ensuring the safe, stable and efficient operation of the system, the system is simplified because no additional afterburning boiler is needed, the equipment investment is reduced, the original waste heat resources of the heating furnace system are utilized more fully, and the economic benefit and the social benefit are very obvious.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A heating furnace flue gas and steam waste heat recovery power generation system is characterized in that the waste heat recovery power generation system comprises a flue gas waste heat boiler system, a heating furnace vaporization cooling system, a steam turbine generator set system, a condensed water return water supply system and a combined control system;
the flue gas waste heat boiler system comprises a flue gas waste heat boiler (1) consisting of a superheater (2), an evaporator (3) and an economizer (4), a flue gas waste heat boiler steam drum (5) and a flue gas waste heat boiler steam drum water supply regulating valve (17);
the heating furnace vaporization cooling system comprises a vaporization cooling steam drum (6), a heating furnace water beam vaporization cooling loop (7), a vaporization cooling forced circulation pump (8) and a vaporization cooling steam drum water supply regulating valve (16);
the steam turbine generator unit comprises a steam turbine (9) and a generator (10); wherein,
the flue gas of the main exhaust flue of the heating furnace is subjected to heat exchange sequentially through the superheater (2), the evaporator (3) and the economizer (4) and then is exhausted into the atmosphere;
the condensed water return supply system is respectively connected with a steam turbine (9) of the steam turbine generator unit and an inlet of the economizer (4), and condensed water generated by the steam turbine (9) is sent into the economizer (4);
the outlet of the economizer (4) is respectively connected with a flue gas waste heat boiler steam drum (5) and a vaporization cooling steam drum (6), and heated condensed water is respectively sent to the flue gas waste heat boiler steam drum (5) and the vaporization cooling steam drum (6);
the flue gas waste heat boiler steam drum (5) is connected with the inlet of the evaporator (3) through a downcomer, and the outlet of the evaporator (3) is connected back to the inside of the flue gas waste heat boiler steam drum (5); a steam pipeline of the smoke waste heat boiler steam drum (5) is connected with an inlet of the superheater (2); the unsaturated water absorbs the heat of the flue gas of the evaporator (3) and is changed into a steam-water mixture, after steam-water separation is carried out on a flue gas waste heat boiler steam drum (5), saturated water enters the next cycle, and saturated steam enters the superheater (2);
the evaporation cooling steam pocket (6) is connected with the evaporation cooling loop (7) of the water beam of the heating furnace through a descending pipeline and an evaporation cooling forced circulation pump (8) to form a circulation loop, saturated water enters the evaporation cooling loop (7) of the water beam of the heating furnace, is changed into a steam-water mixture and then is sent back to the evaporation cooling steam pocket (6) for steam-water separation, the saturated water enters the next circulation, and saturated steam enters the superheater (2);
the outlet of the superheater (2) is connected with a steam turbine (9) of a steam turbine generator unit, and the superheater (2) provides superheated steam for the steam turbine (9).
2. The heat recovery power generation system of claim 1, wherein the condensate return supply system comprises a condenser (11), a condensate pump (12), a thermal deaerator (13), and a boiler feed water pump (14); the condenser (11) is connected with the steam turbine (9), exhaust steam after doing work is condensed into condensed water, the condensed water is sent to the thermal deaerator (13) through the condensed water pump (12), and the condensed water is sent to the economizer (4) after being pressurized by the water feed pump (14) after being pumped and heated by the steam turbine (9) to realize thermal deaerating, so that thermal circulation is completed.
3. The waste heat recovery power generation system of claim 2, wherein the combined control system comprises a flue gas waste heat boiler feed water regulating valve (17) which is arranged on a feed water pipeline from an outlet of the economizer (4) to the flue gas waste heat boiler steam drum (5); the water supply regulating valve (16) of the evaporative cooling steam pocket is arranged on a water supply pipeline from the outlet of the economizer (4) to the evaporative cooling steam pocket (6); the combined control system adjusts and controls the opening of the two regulating valves according to the water levels of the two steam drums, the main steam flow and the water supply flow of the steam drums, so that the water level of the steam drums is stable and the two steam drums run in parallel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN103670556A (en) * | 2013-11-27 | 2014-03-26 | 陕西擎华新能源技术有限公司 | Double-working-medium circulation waste heat power generating system |
| CN106052405A (en) * | 2016-05-26 | 2016-10-26 | 中冶东方工程技术有限公司 | Heating furnace waste heat comprehensive utilization system and method |
| CN106287655B (en) * | 2016-08-12 | 2018-05-01 | 中节能嘉兴建筑能源有限公司 | A kind of steam heat recovery technique |
| CN117780462A (en) * | 2023-12-14 | 2024-03-29 | 宁德开能环保能源有限公司 | Industrial waste gas energy recovery method and system for self-adaptive thermoelectric conversion |
-
2013
- 2013-06-20 CN CN2013203540619U patent/CN203296838U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN103670556A (en) * | 2013-11-27 | 2014-03-26 | 陕西擎华新能源技术有限公司 | Double-working-medium circulation waste heat power generating system |
| CN103670556B (en) * | 2013-11-27 | 2015-08-12 | 陕西擎华新能源技术有限公司 | A kind of double-work medium cycle waste heat generating system |
| CN106052405A (en) * | 2016-05-26 | 2016-10-26 | 中冶东方工程技术有限公司 | Heating furnace waste heat comprehensive utilization system and method |
| CN106287655B (en) * | 2016-08-12 | 2018-05-01 | 中节能嘉兴建筑能源有限公司 | A kind of steam heat recovery technique |
| CN117780462A (en) * | 2023-12-14 | 2024-03-29 | 宁德开能环保能源有限公司 | Industrial waste gas energy recovery method and system for self-adaptive thermoelectric conversion |
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