CN117685554A - Steam-air heat exchanger and garbage power generation system - Google Patents
Steam-air heat exchanger and garbage power generation system Download PDFInfo
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- CN117685554A CN117685554A CN202311764186.3A CN202311764186A CN117685554A CN 117685554 A CN117685554 A CN 117685554A CN 202311764186 A CN202311764186 A CN 202311764186A CN 117685554 A CN117685554 A CN 117685554A
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- 238000010248 power generation Methods 0.000 title abstract description 10
- 238000004781 supercooling Methods 0.000 claims abstract description 31
- 238000000605 extraction Methods 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 230000002209 hydrophobic effect Effects 0.000 claims description 17
- 238000003062 neural network model Methods 0.000 claims description 12
- 238000013528 artificial neural network Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000005514 two-phase flow Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013527 convolutional neural network Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a steam-air heat exchanger and a garbage power generation system, wherein the input ends of a low-pressure steam section and a high-pressure steam section are respectively provided with an adjusting valve group; the low-pressure steam section is connected with the low-pressure supercooling section through an adjusting valve group; the high-pressure steam section is connected with the high-pressure supercooling section through an adjusting valve group; the low-pressure supercooling section and the high-pressure supercooling section are both connected with the deaerator; the controller is used for calculating the extra heat loss of the steam-air heat exchanger according to the working information of the steam-air heat exchanger and determining the drainage control parameter of the steam-air heat exchanger according to the extra heat loss. In the non-fault state of the steam-air heat exchanger, if the related parameters of the drainage system are not matched with the running state of the steam-air heat exchanger, pipeline water hammer phenomenon occurs, and additional heat loss is inevitably generated.
Description
Technical Field
The invention belongs to the technical field of garbage incineration power generation, and particularly relates to a steam-air heat exchanger and a garbage power generation system.
Background
The waste incineration boiler is an important core equipment of the waste incineration power plant. Unlike conventional coal-fired power plant, the flue gas of the waste incineration power plant contains a large amount of acid gas, and low-temperature corrosion and ash deposition of the air preheater are easy to generate, so that the steam air preheater is generally arranged in the system, and the air temperature is raised to be above the acid dew point by utilizing the energy of heating steam, so that the low-temperature corrosion is reduced. The air preheater for the household garbage incineration power generation project adopts the arrangement outside the furnace, takes the steam drum extraction steam and the steam turbine extraction steam as a steam source to exchange heat with air, and the condensed water generated after heat exchange is recycled through a drainage system. The reasonable configuration of the drainage system can ensure the steam parameters required by the steam-air heat exchanger, improve the heat exchange efficiency of the steam-air heat exchanger and ensure the primary air temperature.
In a conventional drainage system, the regulating valve and the drainage valve are usually mechanical valves, the degree of automation is low, the opening degree of each valve cannot be adjusted in real time according to the actual working state of the heat exchanger, so that the drainage pipeline has the condition of vapor-liquid two-phase flow, pipeline water hammer is easy to cause, the drainage of the system is influenced, and the conditions of pipeline impact, abrasion, deaerator overpressure and the like are also easy to cause.
Disclosure of Invention
In view of the above, the invention provides a steam-air heat exchanger and a garbage power generation system, which aim to solve the problem of pipeline water hammer caused by lower automation degree of a drainage system in the prior art.
A first aspect of an embodiment of the present invention provides a steam-air heat exchanger, including: the system comprises a low-pressure steam section, a high-pressure steam section, a low-pressure supercooling section, a high-pressure supercooling section, two regulating valve groups, two drainage valve groups and a controller;
the input ends of the low-pressure steam section and the high-pressure steam section are respectively provided with an adjusting valve group; the low-pressure steam section is connected with the low-pressure supercooling section through an adjusting valve group; the high-pressure steam section is connected with the high-pressure supercooling section through an adjusting valve group; the low-pressure supercooling section and the high-pressure supercooling section are both connected with the deaerator;
the controller is used for calculating the extra heat loss of the steam-air heat exchanger according to the working information of the steam-air heat exchanger and determining the drainage control parameter of the steam-air heat exchanger according to the extra heat loss.
A second aspect of an embodiment of the present invention provides a refuse power generation system comprising a steam turbine and a steam-air heat exchanger provided with the steam-air heat exchanger of the first aspect above.
The embodiment of the invention provides a steam-air heat exchanger and a garbage power generation system, which comprise a low-pressure steam section, a high-pressure steam section, a low-pressure supercooling section, a high-pressure supercooling section, two regulating valve groups, two drainage valve groups and a controller; the input ends of the low-pressure steam section and the high-pressure steam section are respectively provided with an adjusting valve group; the low-pressure steam section is connected with the low-pressure supercooling section through an adjusting valve group; the high-pressure steam section is connected with the high-pressure supercooling section through an adjusting valve group; the low-pressure supercooling section and the high-pressure supercooling section are both connected with the deaerator; the controller is used for calculating the extra heat loss of the steam-air heat exchanger according to the working information of the steam-air heat exchanger and determining the drainage control parameter of the steam-air heat exchanger according to the extra heat loss. In the non-fault state of the steam-air heat exchanger, if the related parameters of the drainage system are not matched with the running state of the steam-air heat exchanger, pipeline water hammer phenomenon occurs, and additional heat loss is inevitably generated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a steam-air heat exchanger according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an adjusting valve set according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a hydrophobic valve set according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Fig. 1 is a schematic structural diagram of a steam-air heat exchanger according to an embodiment of the present invention. As shown in fig. 1, the steam-air heat exchanger includes: a low pressure steam section 11, a high pressure steam section 12, a low pressure subcooling section 13, a high pressure subcooling section 14, two regulating valve groups 15, two drain valve groups 16 and a controller 17;
wherein, the input ends of the low pressure steam section 11 and the high pressure steam section 12 are respectively provided with an adjusting valve group 15; the low-pressure steam section 11 is connected with the low-pressure supercooling section 13 through an adjusting valve group 15; the high-pressure steam section 12 is connected with the high-pressure supercooling section 14 through an adjusting valve group 15; the low-pressure supercooling section 13 and the high-pressure supercooling section 14 are both connected with a deaerator;
the controller 17 is configured to calculate an additional heat loss of the steam-air heat exchanger based on the operation information of the steam-air heat exchanger, and determine a drainage control parameter of the steam-air heat exchanger based on the additional heat loss.
In the embodiment of the invention, after the steam is extracted from a steam drum of a steam turbine, 4.6MPa and 240 ℃ steam is conveyed to the high-pressure steam section 12 through the regulating valve group, after heat exchange is completed, condensed water is discharged through the hydrophobic valve group and is conveyed to the high-pressure supercooling section, so that 100 ℃ supercooled water is obtained, and the supercooled water is conveyed to the deaerator to recover waste heat, and is preheated and returned to the steam turbine.
In the embodiment of the invention, after the steam is extracted from a steam turbine of the steam turbine, the steam with the temperature of 1.2MPa and 300 ℃ is conveyed to the low-pressure steam section 12 through the regulating valve group, after the heat exchange is completed, the condensed water is discharged through the hydrophobic valve group and is conveyed to the low-pressure supercooling section, the supercooled water with the temperature of 80 ℃ is obtained, the supercooled water is conveyed to the deaerator to recover waste heat, and the waste heat is preheated and returned to the steam turbine.
In the embodiment of the invention, after the external air is input into the steam-air heat exchanger, the external air sequentially passes through the low-pressure supercooling section 13, the high-pressure supercooling section 14, the low-pressure steam section 11 and the high-pressure steam section 12 and is heated step by step, so that primary air with higher temperature is finally obtained, the garbage is dried, the garbage is assisted in combustion, meanwhile, the low-temperature corrosion is avoided, and the operation efficiency of the garbage power generation system is improved.
In some embodiments, the steam-air heat exchanger further comprises a wind speed sensor, a flow meter, a plurality of temperature sensors, and a plurality of pressure sensors connected to the controller 17 for monitoring the operational information; the operation information of the steam-air heat exchanger includes: the controller 17 is specifically configured to: calculating heat exchange power of the steam-air heat exchanger according to the steam quantity information, the steam temperature information, the steam pressure information, the first neural network model and the second neural network model; determining the target primary air temperature of the steam-air heat exchanger according to the heat exchange power, the primary air quantity and the ambient temperature; and determining the additional heat loss according to the target primary air temperature, the actual primary air temperature and the primary air quantity.
In the embodiment of the invention, a temperature sensor is arranged at the air inlet of the steam-air heat exchanger to monitor the ambient temperature, a temperature sensor is also arranged at the air outlet to monitor the actual primary air temperature, and meanwhile, the wind speed monitored by the wind speed sensor is multiplied by the cross-sectional area of the air outlet, namely the primary air quantity in unit time. And a flowmeter is arranged in the pipelines of the two groups of regulating valve groups and used for monitoring the steam quantity information. In addition, a group of sensors (namely a temperature sensor and a pressure sensor) are arranged in the pipelines of the regulating valve group and the drain valve group and are used for monitoring steam temperature information and steam pressure information of the pipeline where the valve group is located.
In some embodiments, the steam volume information includes a drum extraction and a low pressure extraction; the steam temperature information includes: high-pressure steam extraction temperature, high-pressure drainage temperature, low-pressure steam extraction temperature and low-pressure drainage temperature; the steam pressure information includes: the high-pressure steam extraction pressure, the high-pressure drainage pressure, the low-pressure steam extraction pressure, the low-pressure drainage pressure and the controller 17 are specifically configured to: determining high-pressure side heat exchange power according to the steam drum steam extraction amount, the high-pressure steam extraction pressure, the high-pressure steam extraction temperature, the high-pressure drainage pressure, the high-pressure drainage temperature and the first neural network model; determining low-pressure side heat exchange power according to the low-pressure steam extraction quantity, the low-pressure steam extraction pressure, the low-pressure steam extraction temperature, the low-pressure drainage pressure, the low-pressure drainage temperature and the second neural network model; and taking the sum of the heat exchange power of the high-pressure side and the heat exchange power of the low-pressure side as the heat exchange power of the steam-air heat exchanger.
In theory, according to the specific heat capacity of the steam corresponding to the high-pressure air extraction pressure, the high-pressure air extraction temperature is multiplied, namely, the high-pressure steam energy under the unit mass before heat exchange, meanwhile, according to the specific heat capacity of the steam corresponding to the high-pressure drainage pressure, the high-pressure drainage pressure is multiplied, namely, the high-pressure steam energy under the unit mass after heat exchange, the difference is made between the high-pressure steam energy before heat exchange and the high-pressure steam energy after heat exchange, namely, the heat exchange power of the high-pressure side, and the low-pressure side is the same, and the method is not limited.
In practice, however, in addition to the steam used for heating the air, a certain heat loss is generated in the installation, which is defined as normal heat loss. The normal heat loss is formed because it is complex and difficult to calculate quantitatively, but the heat loss is usually fixed for the same equipment.
Therefore, through carrying out the experiment in advance on the equipment, the expert determines the heat exchange power experimental value under different working information, takes the working information as input and the heat exchange power experimental value as output, trains the neural network, and the trained first neural network can automatically remove the heat loss of the equipment, so that the calculated heat exchange power is close to the actual heat exchange power. The training process of the second neural network is the same and will not be described here.
After the heat exchange power calculation is completed, the heat exchange power is multiplied by the primary air quantity passing through the unit time, namely the heat transferred to the air, and the target primary air temperature can be obtained by combining the ambient temperature and the specific heat capacity of the air.
If the difference between the actual primary air temperature monitored by the temperature sensor arranged at the air outlet and the target primary air temperature is larger than a preset value, the steam-air heat exchanger is proved to generate other additional heat losses besides the normal equipment heat losses.
An important characteristic of vapor-liquid two-phase flow is that during flow, interconversion between vapor and liquid may occur. Steam may condense into water at high temperatures, and water may re-vaporize into steam as the pressure is reduced. Such phase changes not only complicate the flow but may also cause the flow to be unstable, thereby generating noise and vibration, which may cause damage to the device. When vapor-liquid two-phase flow occurs, the device may generate additional heat loss. Therefore, if the method of the invention monitors the additional heat loss, the current hydrophobic control parameters of the surface are not suitable for the working state of the steam-air heat exchanger any more, and therefore, the method needs to be adjusted.
In some embodiments, the controller 17 is specifically configured to determine the additional heat loss according to the following equation:
Q＝cρV(T 0 -T)
wherein T is 0 The target primary air temperature is T, the actual primary air temperature is V, the primary air quantity is C, the specific heat capacity of air is c, and ρ is the air density at the ambient temperature.
In some embodiments, the controller 17 is specifically configured to: the additional heat loss is input into a third neural network, and a hydrophobic control parameter of the steam-air heat exchanger is determined.
In the embodiment of the invention, a plurality of hydrophobic control parameters which are not matched with the working state of the steam-air heat exchanger can be prepared in advance, working conditions of the steam-liquid two-phase flow are generated, the extra heat loss relative to the normal working conditions under the working conditions is measured in an experimental mode and is taken as input, meanwhile, the hydrophobic control parameters required by adjusting the working conditions to the normal working conditions are evaluated by an expert and are taken as input, a training set and a testing set are formed, and the third neural network model is trained.
The first neural network model, the second neural network model, and the third neural network model of the present invention may be convolutional neural networks, feedforward neural networks, and the like, which are not limited herein.
In some embodiments, the controller 17 is specifically configured to: and inputting the high-pressure side heat exchange power, the low-pressure side heat exchange power, the heat exchange power of the steam-air heat exchanger and the additional heat loss into a third neural network, and determining the drainage control parameters of the steam-air heat exchanger.
In the embodiment of the invention, the high-pressure side heat exchange power, the low-pressure side heat exchange power and the heat exchange power of the steam-air heat exchanger can be added into the input of the neural network, and the extra heat loss is more likely to occur at the high-pressure side or the low-pressure side through the ratio of the high-pressure side heat exchange power and the low-pressure side heat exchange power in the heat exchange power of the steam-air heat exchanger, so that the hydrophobic control parameters of the related valve groups can be adjusted more accurately.
In some embodiments, the hydrophobic control parameters include the opening of each regulator valve block 15 and the opening of each hydrophobic valve block 16.
In the embodiment of the invention, the opening degree of the regulating valve group and the opening degree of the hydrophobic valve group are changed, so that the flow and the pressure of steam in the pipeline are changed, and the occurrence of the phenomenon of vapor-liquid two-phase flow is reduced. The relationship between the opening value and the flow rate and pressure in the pipe line can be determined specifically by experiments, and is not limited herein.
Fig. 2 is a schematic structural diagram of an adjusting valve set 15 according to an embodiment of the present invention. As shown in fig. 2, in some embodiments, the regulator valve block 15 includes: an electric control valve 21, two maintenance stop valves 22, and a bypass stop valve 23; two overhaul stop valves 22 are respectively arranged at two sides of the electric regulating valve 21; the electric regulating valve 21 is used for regulating the flow rate and pressure of the steam in the pipeline; the bypass shutoff valve 23 is provided on a bypass of the line in which the electric control valve 21 is located.
Fig. 3 is a schematic structural diagram of a hydrophobic valve group 16 according to an embodiment of the present invention. As shown in fig. 3, in some embodiments, the hydrophobic valve block 16 comprises: drain valve 31, drain service shut-off valve 32, and drain bypass shut-off valve 33; the drain valve 31 is used for blocking and draining steam in the pipeline; two drain overhaul stop valves 32 are respectively arranged at two sides of the drain valve 31; a drain bypass shutoff valve 33 is provided in the bypass of the line in which drain valve 31 is located.
In some embodiments, a garbage power system includes a steam turbine and a steam-air heat exchanger of the steam-air heat exchanger. The steam-air heat exchanger extracts high-temperature steam from a steam drum of the steam turbine and the steam turbine, heats air to obtain primary air with higher temperature, and recovers and preheats the steam after supercooling of the steam with reduced heat is completed by the deaerator and returns the steam to the steam turbine. Primary air is blown into garbage to be combusted in the steam turbine, drying and preheating are carried out, and the operation of the steam turbine is assisted.
In summary, the beneficial effects of the invention are as follows:
1. in the non-fault state of the steam-air heat exchanger, if the related parameters of the drainage system are not matched with the running state of the steam-air heat exchanger, pipeline water hammer phenomenon occurs, and additional heat loss is inevitably generated.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A steam-air heat exchanger, comprising: the system comprises a low-pressure steam section, a high-pressure steam section, a low-pressure supercooling section, a high-pressure supercooling section, two regulating valve groups, two drainage valve groups and a controller;
wherein, the input ends of the low pressure steam section and the high pressure steam section are respectively provided with an adjusting valve group; the low-pressure steam section is connected with the low-pressure supercooling section through an adjusting valve group; the high-pressure steam section is connected with the high-pressure supercooling section through an adjusting valve group; the low-pressure supercooling section and the high-pressure supercooling section are both connected with a deaerator;
the controller is used for calculating the extra heat loss of the steam-air heat exchanger according to the working information of the steam-air heat exchanger and determining the drainage control parameter of the steam-air heat exchanger according to the extra heat loss.
2. The steam-air heat exchanger of claim 1, further comprising a wind speed sensor, a flow meter, a plurality of temperature sensors, and a plurality of pressure sensors coupled to a controller for monitoring the operational information; the operation information of the steam-air heat exchanger includes: ambient temperature, actual primary air temperature, primary air quantity, steam quantity information, steam temperature information and steam pressure information, the controller is specifically used for:
calculating heat exchange power of the steam-air heat exchanger according to the steam quantity information, the steam temperature information, the steam pressure information, the first neural network model and the second neural network model;
determining a target primary air temperature of the steam-air heat exchanger according to the heat exchange power, the primary air quantity and the ambient temperature;
and determining the additional heat loss according to the target primary air temperature, the actual primary air temperature and the primary air quantity.
3. The steam-air heat exchanger of claim 2, wherein the steam volume information includes a drum extraction volume and a low pressure extraction volume; the steam temperature information includes: high-pressure steam extraction temperature, high-pressure drainage temperature, low-pressure steam extraction temperature and low-pressure drainage temperature; the steam pressure information includes: the controller is specifically used for:
determining high-pressure side heat exchange power according to the steam drum steam extraction amount, the high-pressure steam extraction pressure, the high-pressure steam extraction temperature, the high-pressure drainage pressure, the high-pressure drainage temperature and the first neural network model;
determining low-pressure side heat exchange power according to the low-pressure steam extraction quantity, the low-pressure steam extraction pressure, the low-pressure steam extraction temperature, the low-pressure drainage pressure, the low-pressure drainage temperature and the second neural network model;
and taking the sum of the heat exchange power of the high-pressure side and the heat exchange power of the low-pressure side as the heat exchange power of the steam-air heat exchanger.
4. A steam-air heat exchanger according to claim 3, wherein the controller is specifically configured to determine the additional heat loss according to the following formula:
Q＝cρV(T 0 -T)
wherein T is 0 And for the target primary air temperature, T is the actual primary air temperature, V is the primary air quantity, c is the specific heat capacity of air, and ρ is the air density at the ambient temperature.
5. A steam-air heat exchanger according to claim 3, wherein the controller is specifically configured to:
and inputting the high-pressure side heat exchange power, the low-pressure side heat exchange power, the heat exchange power of the steam-air heat exchanger and the additional heat loss into a third neural network, and determining the drainage control parameter of the steam-air heat exchanger.
6. A steam-air heat exchanger according to claim 1, wherein the controller is specifically configured to:
the additional heat loss is input into a third neural network, and the hydrophobic control parameter of the steam-air heat exchanger is determined.
7. A steam-air heat exchanger according to any of claims 1-6, wherein the hydrophobic control parameter comprises an opening degree of each regulating valve group and an opening degree of each hydrophobic valve group.
8. A steam-air heat exchanger according to any one of claims 1-6, wherein the regulating valve group comprises: the device comprises an electric regulating valve, two overhaul stop valves and a bypass stop valve; the two overhaul stop valves are respectively arranged at two sides of the electric regulating valve; the electric regulating valve is used for regulating the flow and pressure of steam in the pipeline; the bypass stop valve is arranged on a bypass of a pipeline where the electric regulating valve is located.
9. A steam-air heat exchanger according to any one of claims 1-6, wherein the hydrophobic valve block comprises: the drain valve is connected with the drain bypass stop valve; the drain valve is used for blocking steam in the pipeline and draining the steam; two drain overhaul stop valves are respectively arranged at two sides of the drain valve; the drain bypass stop valve is arranged on a bypass of a pipeline where the drain valve is located.
10. A waste power system comprising a steam turbine and a steam-air heat exchanger as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311764186.3A CN117685554A (en) | 2023-12-20 | 2023-12-20 | Steam-air heat exchanger and garbage power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311764186.3A CN117685554A (en) | 2023-12-20 | 2023-12-20 | Steam-air heat exchanger and garbage power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117685554A true CN117685554A (en) | 2024-03-12 |
Family
ID=90130007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311764186.3A Pending CN117685554A (en) | 2023-12-20 | 2023-12-20 | Steam-air heat exchanger and garbage power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117685554A (en) |
-
2023
- 2023-12-20 CN CN202311764186.3A patent/CN117685554A/en active Pending
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