CN115031255A - Flue gas recycling device of micro-gas turbine combined heat and power generation system - Google Patents
Flue gas recycling device of micro-gas turbine combined heat and power generation system Download PDFInfo
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- CN115031255A CN115031255A CN202210725391.8A CN202210725391A CN115031255A CN 115031255 A CN115031255 A CN 115031255A CN 202210725391 A CN202210725391 A CN 202210725391A CN 115031255 A CN115031255 A CN 115031255A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000003546 flue gas Substances 0.000 title claims abstract description 120
- 239000007789 gas Substances 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000010248 power generation Methods 0.000 title description 5
- 238000004880 explosion Methods 0.000 claims abstract description 9
- 238000013022 venting Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 49
- 230000005540 biological transmission Effects 0.000 claims description 42
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 8
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 238000011065 in-situ storage Methods 0.000 description 18
- 239000000779 smoke Substances 0.000 description 17
- 239000003245 coal Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Classifications
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- 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
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/26—Details
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Combustion (AREA)
Abstract
The invention discloses a flue gas recycling device of a micro gas turbine cogeneration system, which comprises a high-temperature flue, a pressure protection system and a temperature protection system, wherein the high-temperature flue is connected between the micro gas turbine cogeneration system and a coal-fired boiler, and the high-temperature flue is provided with a first compensator, a control valve, an explosion venting device, a second compensator and a flue gas check valve. The inlet of the high-temperature flue collects high-temperature flue gas discharged by the micro-gas turbine cogeneration system, the outlet of the high-temperature flue gas is connected to a secondary air pipeline of the coal-fired boiler, and the high-temperature flue gas discharged by the micro-gas turbine cogeneration system can be recycled through the device. The device of the invention not only reduces the emission point of the factory flue gas, but also can recover the high-temperature flue gas, thereby realizing energy conservation and emission reduction.
Description
Technical Field
The invention discloses a device which is combined with a micro-gas turbine cogeneration system and used for recycling high-temperature flue gas and comprehensively utilizing the high-temperature flue gas, relates to recycling of high-temperature flue gas, and is applied to the field of micro-gas turbine cogeneration.
Background
According to the comprehensive working scheme of energy conservation and emission reduction, the optimization of the structure of the Chinese industry is obviously accelerated, the acceleration and the slowing of energy consumption are realized, and the development of the resource, high energy consumption and high emission industry is gradually attenuated. However, with the accelerated industrialization and urbanization processes and the continuous upgrading of consumption structures, the energy demand rigidity is increased, the resource and environment problems are still one of the bottlenecks restricting the development of the economy and the society, and the energy conservation and emission reduction are still serious and the task is difficult.
The method is used for preventing and treating atmospheric pollution, and firstly, a source is caught, and a series of energy policies such as cogeneration, comprehensive utilization and the like are deeply strengthened.
High-temperature flue gas generated by the existing micro-gas turbine cogeneration technology is directly discharged or discharged after partial heat is recovered, and the problems of low efficiency and energy waste of an energy system are difficult to fundamentally solve by depending on a certain single technology or measure. The energy system needs to be comprehensively upgraded from a one-way, splitting and distributed energy utilization mode to a multi-system cooperative mode.
Disclosure of Invention
The invention aims to comprehensively utilize high-temperature flue gas generated by cogeneration, and provides a flue gas recycling device which is simple in structure and reliable in operation. By the flue gas recycling device, a micro-gas turbine cogeneration system and a traditional coal-fired boiler are connected into an organic whole, so that energy conservation and emission reduction are realized.
The invention discloses a flue gas recycling device of a micro-gas turbine cogeneration system, which comprises a high-temperature flue connected between the micro-gas turbine cogeneration system and a coal-fired boiler, wherein a flue gas inlet of the high-temperature flue is connected with a flue gas discharge port of the micro-gas turbine cogeneration system, a flue gas outlet of the high-temperature flue is connected with a secondary air pipeline of the coal-fired boiler, a first compensator for absorbing thermal deformation of the high-temperature flue, a control valve for cutting off flue gas, an explosion venting device for pressure relief protection, a second compensator and a check valve for preventing a medium in the flue from flowing backwards are sequentially arranged on the high-temperature flue along the flow direction of the flue gas, and the high-temperature flue is respectively linked with the micro-gas turbine cogeneration control system through a temperature protection system and a pressure protection system.
Furthermore, a first branch pipe is branched from a high-temperature flue between a flue gas discharge port of the micro-combustion engine cogeneration system and the first compensator, and a second branch pipe is branched from a high-temperature flue between the check valve and a secondary air pipeline of the coal-fired boiler.
The secondary air is hot air which is sent into the hearth through a single channel (secondary air pipeline) and is gradually mixed with the primary air after entering the hearth. The secondary air provides oxygen for the combustion of carbon, can strengthen the disturbance of airflow, promotes the backflow of high-temperature flue gas, promotes the mixing of combustible materials and oxygen, and provides conditions for complete combustion. The overfire air is typically provided by a blower, heated by an air preheater. The secondary air has higher temperature and needs high-temperature air or flue gas, thereby being beneficial to the ignition of the pulverized coal. The exhaust gas temperature of the micro-combustion engine cogeneration system reaches the requirement of the temperature range.
Further, the pressure protection system comprises a flue gas inlet pressure monitoring system and a flue gas outlet pressure monitoring system, wherein the flue gas inlet pressure monitoring system comprises a first branch pipe, a first valve, a first shutoff valve group, a first local display pressure gauge for observing the flue gas inlet pressure of the high-temperature flue on site, a first remote transmission pressure transmitter which is connected with the first local display pressure gauge through an electric signal and transmits an inlet pressure signal to the cogeneration control system of the micro-combustion engine, the flue gas outlet pressure monitoring system comprises a second branch pipe, a second valve, a second shutoff valve group, a second local display pressure gauge for observing the flue gas outlet pressure of the high-temperature flue on site, and a second remote transmission pressure transmitter which is connected with the second local display pressure gauge through an electric signal and transmits an outlet pressure signal to the cogeneration control system of the micro-combustion engine, a differential pressure remote transmitter is arranged between the first remote transmission pressure transmitter and the second remote transmission pressure transmitter, the first remote transmission pressure transmitter, the second remote transmission pressure transmitter and the differential pressure remote transmitter are controlled by electric signals and are connected with a micro-combustion engine cogeneration control system, the first valve is a stop valve and is used for shutting off flue gas when the first branch pipe is overhauled, and the second valve is a stop valve and is used for shutting off flue gas when the second branch pipe is overhauled; the differential pressure remote transmitter is provided with a differential pressure local display function and a remote function and is used for observing the smoke resistance of a high-temperature flue on site and remotely transmitting a resistance signal to the micro-combustion machine cogeneration control system, the first local display pressure gauge and the second local display pressure gauge are all used for observing on site, the first remote transmission pressure transmitter, the second remote transmission pressure transmitter and the differential pressure remote transmitter are used for remotely transmitting a pressure signal and a differential pressure signal to the micro-combustion machine cogeneration control system, and when the inlet pressure, the outlet pressure and the differential pressure (resistance) exceed set values, chain alarm and shutdown are carried out. For example, when the resistance shows a normal resistance below 850Pa, for example, when the resistance shows a overpressure alarm above 900Pa, for example, when the resistance shows a shutdown chain above 1000 Pa.
The first shutoff valve group comprises two shutoff valves, wherein one shutoff valve is arranged on the first branch pipe and used as a main path valve for overhauling and cutting off smoke, and the other shutoff valve is arranged on a third branch pipe which is branched from the first branch pipe and used as a branch valve for reserving a smoke sampling interface; the second shutoff valve group comprises two shutoff valves, wherein one of the shutoff valves is arranged on the second branch pipe and used as a main pipe valve for overhauling and cutting off smoke, and the other shutoff valve is arranged on a fourth branch pipe branched from the second branch pipe and used as a branch valve as a reserved smoke sampling interface.
Further, the temperature protection system comprises an on-site display thermometer arranged on the high-temperature flue and used for on-site observation of the temperature of the flue gas, a thermocouple connected with the on-site display thermometer through an electric signal, the thermocouple is connected with the cogeneration control system of the micro-combustion engine through an electric signal, the on-site display thermometer is preferably arranged on the high-temperature flue between the control valve and the explosion venting device, and the thermocouple is used for transmitting the temperature signal to the cogeneration control system of the micro-combustion engine, for example, the temperature is normal when the temperature is displayed below 215 ℃, for example, an overtemperature alarm is carried out when the temperature is displayed above 230 ℃, for example, a chain shutdown is carried out when the temperature is displayed above 240 ℃.
Further, the first compensator and the second compensator may be, for example, ripple compensators.
Further, the control valve may be, for example, a butterfly valve.
The utility model provides a tie point between reasonable selection little combustion engine combined heat and power generation system and the traditional coal fired boiler is in the overgrate air pipeline, guarantees that the backpressure of system is not more than little combustion engine combined heat and power generation system's allowable numerical value. The system of the present application is suitable for use in environments where new smoke emission points are not allowed. Site selection of the cogeneration system, particularly fire prevention spacing, should meet standard specifications.
The invention has the advantages and effects that firstly, the problems that the original micro-gas turbine cogeneration system needs to be provided with a smoke discharge point independently and discharges high-temperature smoke to cause energy waste and the like are solved; secondly, the micro-gas turbine cogeneration system is combined with the secondary air of the coal-fired boiler, and a high-temperature flue gas medium and heat thereof generated by the cogeneration system are recycled and used by the secondary air of the coal-fired boiler, so that pulverized coal combustion is facilitated, the emission point of flue gas is reduced, and the effects of energy conservation and emission reduction are achieved. According to the flue gas recycling device, the power for flowing flue gas comes from the micro-combustion engine, a flue gas pressurizing system such as a fan and the like is not needed to be added, the gradient utilization of energy is easy to realize, and the comprehensive efficiency of resources is improved; comprehensively utilize clean energy and complementary energy waste heat, improve clean energy structure proportion, promote the emission reduction space.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas recycling device of a micro-combustion engine cogeneration system of the invention.
Wherein:
1-a first compensator, 2-a control valve, 3-an explosion venting device, 4-a check valve, 5-a temperature protection system, 6-a pressure protection system, 7-a second compensator, 8-a micro-combustion engine cogeneration system, 9-a secondary air pipeline of a coal-fired boiler, 10-a micro-combustion engine cogeneration control system, 11-a high-temperature flue, 12-a first branch pipe, 13-a second branch pipe, 14-a first valve, 15-a second valve, 16-a first shutoff valve bank and 17-a second shutoff valve bank.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the flue gas recycling device of the micro-gas turbine cogeneration system (micro gas turbine) comprises a high-temperature flue 11 connected between the micro-gas turbine cogeneration system 8 and a coal-fired boiler, a flue gas inlet of the high-temperature flue 11 is connected with a flue gas discharge port of the micro-gas turbine cogeneration system 8, a flue gas outlet of the high-temperature flue 11 is connected with a secondary air pipeline 9 (preferably at a position with small flue gas thermal displacement of the secondary air pipeline 9) (flue gas of the high-temperature flue and secondary air are mixed and then enter a boiler combustion chamber for combustion, the mixing volume ratio of the flue gas of the high-temperature flue and the secondary air can be calculated according to the temperature and the oxygen content of the flue gas and the secondary air, the mixing volume ratio of the flue gas of the high-temperature flue and the secondary air is usually 1: 0.2-5, preferably 1: 0.5-2), and a first compensator 1 (a flue gas close to the micro-gas turbine cogeneration system 8) for absorbing thermal deformation of the high-temperature flue is sequentially arranged on the high-temperature flue 11 along the flow direction of the flue Discharge port), a control valve 2 for cutting off the flue gas, a let out exploder 3 for pressure release protection, a second compensator 7 (be used for absorbing terminal thermal expansion, the pipeline stress of furthest reduction kneck sets up in being close to overgrate air pipeline 9 department), a check valve 4 for preventing medium refluence in the flue, high temperature flue 11 links with little combustion engine cogeneration control system 10 through temperature protection system 5 and pressure protection system 6 respectively.
The length of the high temperature flue 11 is generally in the range of 10 to 500m, preferably 12 to 300m, preferably 15 to 250m, preferably 20 to 200m, preferably 25 to 150m, for example 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140 m.
A first branch pipe 12 is branched from a high-temperature flue between a flue gas discharge port of the micro-combustion engine cogeneration system 8 and the first compensator 1, and a second branch pipe 13 is branched from the high-temperature flue between the check valve 4 and the secondary air pipeline 9 of the coal-fired boiler.
The pressure protection system comprises a flue gas inlet pressure monitoring system and a flue gas outlet pressure monitoring system, wherein the flue gas inlet pressure monitoring system comprises a first branch pipe 12, a first valve 14, a first shutoff valve group 16, a first local display pressure gauge PIT001, a first remote transmission pressure transmitter PI001, a second branch pipe 13, a second valve 15, a second shutoff valve group 17, a second local display pressure gauge PIT002 and a second remote transmission pressure transmitter PI002, the first valve 14, the first shutoff valve group 16, the first local display pressure gauge PIT001, the first remote transmission pressure transmitter PI001, the first local display pressure gauge PIT001, the first remote transmission pressure transmitter PIT 15, the second remote transmission pressure transmitter PI002, the second local display pressure gauge PIT002, the second remote transmission pressure transmitter PI002 and the second remote transmission pressure transmitter are sequentially arranged on the first branch pipe 12, the first local display pressure gauge PIT001 is used for observing the flue gas inlet pressure of the high-temperature flue gas in a site, the flue gas outlet pressure is remotely transmitted to the micro-gas-turbine cogeneration control system 10 through the second remote transmission pressure transmitter PI002 through the electric signal, a differential pressure remote transmitter PDIA002 is arranged between the first remote transmission pressure transmitter PI001 and the second remote transmission pressure transmitter PI002, the first remote transmission pressure transmitter PI001, the second remote transmission pressure transmitter PI002 and the differential pressure remote transmission transmitter PDIA002 are controlled by electric signals and connected with the micro-combustion engine cogeneration control system 10, the first valve 14 is a stop valve used for shutting off the flue gas when the first branch pipe 12 is overhauled, and the second valve 15 is a stop valve used for shutting off the flue gas when the second branch pipe is overhauled; the differential pressure remote transmitter PDIA002 has both functions of local differential pressure display and remote control, and is used for on-site observation of flue gas resistance of a high-temperature flue and remote transmission of resistance signals to the cogeneration control system of the micro-combustion engine, the first local display pressure gauge PIT001 and the second local display pressure gauge PIT002 are both on-site observation gauges, the first remote pressure transmitter PI001, the second remote pressure transmitter PI002 and the differential pressure remote transmitter PDIA002 are responsible for remote transmission of pressure and differential pressure signals to the cogeneration control system 10 of the micro-combustion engine, and when the inlet pressure, the outlet pressure and the resistance exceed set values, a chain alarm is performed, for example, when the resistance is lower than 850Pa, a normal resistance is obtained, for example, when the resistance is higher than 900Pa, an overpressure alarm is performed, for example, when the resistance is higher than 1000Pa, a chain shutdown is performed. For example, the inlet pressure is normal at 1000Pa, 1050Pa alarms, and 1150Pa chain shutdown; for example, the outlet pressure is 150Pa normal, 130Pa alarm, 110Pa chain stop. The chain shutdown refers to the shutdown of a micro-combustion engine system, and does not influence a coal-fired boiler.
The first shutoff valve group 16 comprises two shutoff valves, wherein one of the shutoff valves is arranged on the first branch pipe and used as a main path valve for overhauling and cutting off the flue gas, and the other shutoff valve is arranged on a third branch pipe branched from the first branch pipe and used as a branch valve for reserving a flue gas sampling interface; the second shut-off valve group 17 comprises two shut-off valves, one of which is arranged on the second branch pipe and used as a main valve for overhauling and cutting off the flue gas, and the other shut-off valve is arranged on a fourth branch pipe branched from the second branch pipe and used as a branch valve as a reserved flue gas sampling interface.
The temperature protection system comprises an in-situ display thermometer TIT001 arranged on a high-temperature flue and used for observing the temperature of flue gas in situ, a thermocouple TI001 connected with the in-situ display thermometer TIT001 through electric signals, wherein the thermocouple TI001 is connected with the micro-combustion engine cogeneration control system 10 through electric signals, the in-situ display thermometer TIT001 is preferably arranged on the high-temperature flue between a control valve 2 and an explosion venting device 3, and the thermocouple TI001 is used for transmitting the temperature signals to the micro-combustion engine cogeneration control system, for example, when the in-situ display thermometer TIT001 displays the temperature to be lower than 215 ℃, the temperature is normal, for example, when the in-situ display thermometer TIT001 displays the temperature to be higher than 230 ℃, an over-temperature alarm is carried out, for example, when the in-situ display thermometer TIT001 displays the temperature to be higher than 240 ℃, and a chain shutdown is carried out.
The first compensator 1 and the second compensator 7 may be, for example, ripple compensators.
The control valve 2 may be, for example, a butterfly valve.
Example 1
The flue gas recycling device of the micro gas turbine cogeneration system (micro gas turbine) shown in fig. 1 is implemented in a project at a certain place in Shandong, and comprises a high-temperature flue 11 arranged between the micro gas turbine cogeneration system 8 and a coal-fired boiler, a flue gas inlet of the high-temperature flue 11 is connected with a flue gas discharge port of the micro gas turbine cogeneration system 8, a flue gas outlet of the high-temperature flue 11 is connected with a secondary air pipeline 9 of the coal-fired boiler (the flue gas of the high-temperature flue and secondary air are mixed and then enter a boiler combustion chamber for combustion, the mixing volume ratio of the flue gas of the high-temperature flue and the secondary air fluctuates within the range of 1: 0.5-2), a first compensator 1 (close to the flue gas discharge port of the micro gas turbine cogeneration system 8) for absorbing thermal deformation of the high-temperature flue, a control valve 2 for cutting off the flue gas, an explosion venting device 3 for protecting and relieving pressure are sequentially arranged on the high-temperature flue 11 along the flow direction of the flue gas, The second compensator 7 (used for absorbing the thermal expansion of the tail end, reducing the pipeline stress at the interface to the maximum extent, arranged near the secondary air pipeline 9) and the check valve 4 used for preventing the medium in the flue from flowing backwards, and the high-temperature flue 11 is linked with the micro gas turbine cogeneration control system 10 through the temperature protection system 5 and the pressure protection system 6 respectively. A first branch pipe 12 is branched from a high-temperature flue between a flue gas discharge port of the micro-combustion engine combined heat and power generation system 8 and the first compensator 1, and a second branch pipe 13 is branched from the high-temperature flue between the check valve 4 and the secondary air pipeline 9 of the coal-fired boiler.
The pressure protection system 6 comprises a flue gas inlet pressure monitoring system and a flue gas outlet pressure monitoring system, wherein the flue gas inlet pressure monitoring system comprises a first branch pipe 12, a first valve 14, a first shutoff valve group 16, a first local display pressure gauge PIT001 and a first remote transmission pressure transmitter PI001, the first valve 14 and the first shutoff valve group 16 are sequentially arranged on the first branch pipe 12, the first local display pressure gauge PIT001 is used for observing the flue gas inlet pressure of the high-temperature flue on site, and the first remote transmission pressure transmitter PIT001 is connected with the first local display pressure gauge PIT001 through an electric signal and transmits an inlet pressure signal to the micro-combustion engine cogeneration control system 10.
The flue gas outlet pressure monitoring system comprises a second branch pipe 13, a second valve 15 and a second shutoff valve group 17 which are sequentially arranged on the second branch pipe 13, a second local display pressure gauge PIT002 for observing the flue gas outlet pressure of the high-temperature flue on site, and a second remote transmission pressure transmitter PI002 which is connected with the second local display pressure gauge PIT002 through an electric signal and transmits an outlet pressure signal to the micro-combustion engine cogeneration control system 10 remotely, wherein a differential pressure remote transmission transmitter PDIA002 is arranged between the first remote transmission pressure transmitter PI001 and the second remote transmission pressure transmitter PI002, the first remote transmission pressure transmitter PI001, the second remote transmission pressure transmitter PI002 and the differential pressure remote transmission transmitter PDIA002 are controlled through the electric signal and connected with the micro-combustion engine cogeneration control system 10, and the first valve 14 is a stop valve, the second valve 15 is a stop valve and is used for shutting off the flue gas when the first branch pipe 12 is overhauled; the pressure difference remote transmitter PDIA002 has both pressure difference in-situ display and remote functions, is used for in-situ observation of flue gas resistance of a high-temperature flue, and simultaneously remotely transmits a resistance signal to the micro-combustion engine cogeneration control system, the first in-situ display pressure gauge PIT001 and the second in-situ display pressure gauge PIT002 are in-situ observation gauges, the first remote transmission pressure transmitter PI001, the second remote transmission pressure transmitter PI002 and the pressure difference remote transmitter PDIA002 are responsible for remotely transmitting the pressure and the pressure difference signal to the micro-combustion engine cogeneration control system 10, when the inlet pressure, the outlet pressure and the resistance exceed set values, linkage alarm is carried out, when the resistance display is lower than 850Pa, the normal resistance is normal, the resistance display is higher than 900Pa, overpressure alarm is carried out, and when the resistance display is higher than 1000Pa, linkage shutdown is carried out. The inlet pressure is normal at 1000Pa, 1050Pa alarms, and 1150Pa is shut down in a linkage manner; the outlet pressure of 150Pa is normal, 130Pa alarms, and 110Pa is stopped in a linkage manner. The chain shutdown refers to the shutdown of a micro-combustion engine system, and does not influence a coal-fired boiler.
The first shutoff valve group 16 comprises two shutoff valves, wherein one of the shutoff valves is arranged on the first branch pipe and used as a main path valve for overhauling and cutting off the flue gas, and the other shutoff valve is arranged on a third branch pipe branched from the first branch pipe and used as a branch valve for reserving a flue gas sampling interface; the second shut-off valve group 17 comprises two shut-off valves, one of which is arranged on the second branch pipe and used as a main valve for overhauling and cutting off the flue gas, and the other shut-off valve is arranged on a fourth branch pipe branched from the second branch pipe and used as a branch valve as a reserved flue gas sampling interface.
The temperature protection system comprises an in-situ display thermometer TIT001 arranged on a high-temperature flue and used for observing the temperature of flue gas on site, and a thermocouple TI001 connected with the in-situ display thermometer TIT001 through an electric signal, wherein the thermocouple TI001 is connected with the micro-combustion engine cogeneration control system 10 through an electric signal, the in-situ display thermometer TIT001 is preferably arranged on the high-temperature flue between a control valve 2 and an explosion venting device 3, the thermocouple TI001 is used for transmitting the temperature signal to the micro-combustion engine cogeneration control system, the temperature is normal when the in-situ display thermometer TIT001 displays the temperature lower than 215 ℃, an overtemperature alarm is carried out when the in-situ display thermometer TIT001 displays the temperature higher than 230 ℃, and a chain shutdown is carried out when the in-situ display thermometer TIT001 displays the temperature higher than 240 ℃.
The first compensator 1 and the second compensator 7 are ripple compensators.
The control valve 2 is a butterfly valve.
As a result, the following advantages are fully realized by the system: 1. a new smoke emission point is not added, so that the investment of a new smoke detection device is avoided; 2. the traditional micro-combustion engine cogeneration system can discharge high-temperature flue gas (about 130-. The amount of flue gas entering the coal-fired boiler of the micro-combustion engine cogeneration system is about 8000Nm 3 The average smoke temperature is 200 ℃, and the heat energy carried by the smoke is about 63.885kcal/Nm 3 The energy saving per hour, less the heat energy carried away with the flue gas of the coal-fired boiler, is 25.7 kilo-cal, which is equivalent to about 36.7kg of standard coal. 8000 hours of operation all the year round, 293.6 tons of standard coal can be saved in the coal-fired boiler every year.
The temperature protection system 5 is arranged, so that the problem of failure of the corrugated compensator caused by overhigh smoke temperature is avoided, high-temperature smoke leakage caused by failure of valve sealing is avoided, and the like; the pressure protection system 6 prevents the smoke discharge resistance from exceeding an allowable value, so that the micro-combustion engine cogeneration system stops.
When the device is implemented, the device is preferably closely combined with a micro-combustion engine cogeneration system, and a control system is communicated and confirmed in advance so as to be embedded with a program. The model selection communication interfaces of the instrument are consistent; selecting a position of a flue access point, which is close to a place with smaller thermal displacement of an original flue; the efficiency of the micro-gas turbine cogeneration system is reduced due to the increase of the smoke resistance, and attention should be paid to the selection of a flue path, the shortening of the flue length and the reduction of the smoke resistance.
In conclusion, the flue gas recycling device can arrange the flue according to the actual situation in the using process, increase the compensator and adjust the protection values of the temperature protection system and the pressure protection system; the flue material, the valve, the instrument model and the like can be selected according to the parameters such as the exhaust gas temperature, the pressure and the like of the cogeneration system. The equipment, the valve, the flue material and the like selected by the device are common materials in practical engineering, the application scene is wide, and the popularization and the use are convenient.
Claims (10)
1. A flue gas recycling device of a micro gas turbine cogeneration system is characterized by comprising a high-temperature flue (11) connected between the micro gas turbine cogeneration system (8) and a coal-fired boiler, a flue gas inlet of the high-temperature flue (11) is connected with a flue gas discharge port of the micro gas turbine cogeneration system (8), a flue gas outlet of the high-temperature flue (11) is connected with a secondary air pipeline (9) of the coal-fired boiler, a first compensator (1) for absorbing thermal deformation of the high-temperature flue, a control valve (2) for cutting off flue gas, an explosion venting device (3) for pressure relief protection, a second compensator (7) and a check valve (4) for preventing a medium in the flue from flowing backwards are sequentially arranged on the high-temperature flue (11) along the flue gas flowing direction, the high-temperature flue (11) is linked with a micro-combustion engine cogeneration control system (10) through a temperature protection system (5) and a pressure protection system (6) respectively.
2. The flue gas recycling device according to claim 1, wherein a first branch pipe (12) is branched from a high-temperature flue between a flue gas discharge port of the micro-combustion engine cogeneration system (8) and the first compensator (1), and a second branch pipe (13) is branched from a high-temperature flue between the check valve (4) and the secondary air pipeline (9) of the coal-fired boiler.
3. The flue gas recycling apparatus of claim 1, wherein the pressure protection system comprises a flue gas inlet pressure monitoring system and a flue gas outlet pressure monitoring system.
4. The flue gas recycling device of claim 3, wherein the flue gas inlet pressure monitoring system comprises a first branch pipe (12), a first valve (14) and a first shutoff valve group (16) which are sequentially arranged on the first branch pipe (12), a first local display pressure gauge (PIT001) for on-site observation of the inlet pressure of the flue gas in the high-temperature flue, and a first remote transmission pressure transmitter (PI001) which is connected with the first local display pressure gauge (PIT001) through an electric signal and transmits the inlet pressure signal to the micro-combustion engine cogeneration control system (10).
5. The flue gas recycling device of claim 3 or 4, wherein the flue gas outlet pressure monitoring system comprises a second branch pipe (13), a second valve (15) and a second shutoff valve set (17) which are sequentially arranged on the second branch pipe (13), a second local display pressure gauge (PIT002) for on-site observation of the flue gas outlet pressure of the high-temperature flue, a second remote transmission pressure transmitter (PI002) which is connected with the second local display pressure gauge (PIT002) through an electric signal and transmits the outlet pressure signal to the micro-combustion engine cogeneration control system (10), a differential pressure remote transmission transmitter (PDIA002) is arranged between the first remote transmission pressure transmitter (PI001) and the second remote transmission pressure transmitter (PI002), the first remote transmission pressure transmitter (PI001), the second remote transmission pressure transmitter (PI002) and the differential pressure remote transmission transmitter (PDIA002) are mutually controlled by electric signals and are connected with a micro-combustion engine cogeneration control system (10).
6. The flue gas recycling device of claim 4, wherein the first shut-off valve set (16) comprises two shut-off valves, one of which is disposed on the first branch pipe (12) as a main valve for overhauling and shutting off flue gas, and the other of which is disposed on a third branch pipe branching from the first branch pipe (12) as a branch valve for reserving a flue gas sampling interface.
7. The flue gas recycling device of claim 5, wherein the second shut-off valve set (17) comprises two shut-off valves, one of which is disposed on the second branch pipe (13) as a main valve for overhauling and shutting off flue gas, and the other of which is disposed on a fourth branch pipe branching from the second branch pipe (13) as a branch valve for reserving a flue gas sampling interface.
8. The flue gas recycling device according to claim 1, wherein the temperature protection system comprises a local display thermometer (TIT001) arranged on the high temperature flue for observing the flue gas temperature on site, and a thermocouple (TI001) connected with the local display thermometer (TIT001) through an electric signal, wherein the thermocouple (TI001) is connected with the micro-combustion engine cogeneration control system (10) through an electric signal, and the local display thermometer (TIT001) is arranged on the high temperature flue between the control valve (2) and the explosion venting device (3).
9. The flue gas recycling device according to claim 1, wherein the first compensator (1) and the second compensator (7) are corrugated compensators.
10. The flue gas recycling device according to claim 1, wherein the control valve (2) is a butterfly valve.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000045710A (en) * | 1998-08-04 | 2000-02-15 | Ishikawajima Harima Heavy Ind Co Ltd | Gasturbine co-generation equipment and its operation method |
| CN202230373U (en) * | 2011-09-16 | 2012-05-23 | 上海申能临港燃机发电有限公司 | Automatic power plant start up & shut down system of gas-steam combined cycle unit |
| CN203275950U (en) * | 2013-04-28 | 2013-11-06 | 广东中节能环保有限公司 | Flue gas waste heat recovery control system |
| CN105180146A (en) * | 2015-08-12 | 2015-12-23 | 中国华能集团清洁能源技术研究院有限公司 | Multi-stage smoke waste heat recovery and comprehensive utilization system for combined heat and power plant |
| CN205245116U (en) * | 2015-12-17 | 2016-05-18 | 天壕环境股份有限公司 | Compressor station residual heat from flue gas system |
| CN107327322A (en) * | 2017-05-19 | 2017-11-07 | 国网浙江省电力公司电力科学研究院 | A kind of combustion engine coal machine coupled electricity-generation system and its operation method |
| CN108870352A (en) * | 2018-08-01 | 2018-11-23 | 南京南锅动力设备有限公司 | A kind of afterheat boiler system device for shutting down afterburning function with gas turbine |
| CN110500184A (en) * | 2019-08-28 | 2019-11-26 | 上海明华电力科技有限公司 | A kind of afterheat utilizing system promoting Gas Turbine Combined-cycle economy |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN112503497A (en) * | 2020-11-10 | 2021-03-16 | 中国电力工程顾问集团东北电力设计院有限公司 | Combined cycle thermodynamic system based on coupling of light gas turbine and biomass direct-fired grate boiler |
-
2022
- 2022-06-24 CN CN202210725391.8A patent/CN115031255A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000045710A (en) * | 1998-08-04 | 2000-02-15 | Ishikawajima Harima Heavy Ind Co Ltd | Gasturbine co-generation equipment and its operation method |
| CN202230373U (en) * | 2011-09-16 | 2012-05-23 | 上海申能临港燃机发电有限公司 | Automatic power plant start up & shut down system of gas-steam combined cycle unit |
| CN203275950U (en) * | 2013-04-28 | 2013-11-06 | 广东中节能环保有限公司 | Flue gas waste heat recovery control system |
| CN105180146A (en) * | 2015-08-12 | 2015-12-23 | 中国华能集团清洁能源技术研究院有限公司 | Multi-stage smoke waste heat recovery and comprehensive utilization system for combined heat and power plant |
| CN205245116U (en) * | 2015-12-17 | 2016-05-18 | 天壕环境股份有限公司 | Compressor station residual heat from flue gas system |
| CN107327322A (en) * | 2017-05-19 | 2017-11-07 | 国网浙江省电力公司电力科学研究院 | A kind of combustion engine coal machine coupled electricity-generation system and its operation method |
| CN108870352A (en) * | 2018-08-01 | 2018-11-23 | 南京南锅动力设备有限公司 | A kind of afterheat boiler system device for shutting down afterburning function with gas turbine |
| CN110500184A (en) * | 2019-08-28 | 2019-11-26 | 上海明华电力科技有限公司 | A kind of afterheat utilizing system promoting Gas Turbine Combined-cycle economy |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN112503497A (en) * | 2020-11-10 | 2021-03-16 | 中国电力工程顾问集团东北电力设计院有限公司 | Combined cycle thermodynamic system based on coupling of light gas turbine and biomass direct-fired grate boiler |
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