CN115573795A - Reduction device and method, gas power machine and boiler thermoelectric supply system and method - Google Patents
Reduction device and method, gas power machine and boiler thermoelectric supply system and method Download PDFInfo
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- CN115573795A CN115573795A CN202211090161.5A CN202211090161A CN115573795A CN 115573795 A CN115573795 A CN 115573795A CN 202211090161 A CN202211090161 A CN 202211090161A CN 115573795 A CN115573795 A CN 115573795A
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- 230000009467 reduction Effects 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 272
- 239000002912 waste gas Substances 0.000 claims abstract description 97
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 98
- 239000002737 fuel gas Substances 0.000 claims description 61
- 238000002485 combustion reaction Methods 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 20
- 230000001154 acute effect Effects 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000003054 catalyst Substances 0.000 abstract description 5
- 238000006722 reduction reaction Methods 0.000 description 66
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 239000003345 natural gas Substances 0.000 description 5
- 238000003915 air pollution Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
- F01N13/141—Double-walled exhaust pipes or housings
- F01N13/143—Double-walled exhaust pipes or housings with air filling the space between both walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
The invention relates to the technical field of cogeneration, and aims to provide a reduction device and a method, a gas power machine and a boiler thermoelectric supply system and a method, wherein the reduction device has high removal rate of nitrogen oxide, the reduction device comprises a shell, and a first cavity, a second cavity and a third cavity which are arranged in the shell and are sequentially communicated, the first cavity is provided with a waste gas inlet and a first gas inlet, and the third cavity is provided with a second gas inlet and a waste gas outlet. The invention solves the problems that in the prior art, a reduction device removes nitrogen oxides through a catalyst, so that the system operation cost is higher, an auxiliary device of a thermoelectric supply system needs to be driven by external electric power, the power consumption cost is high, and the influence of an external power supply system is larger.
Description
Technical Field
The invention relates to the technical field of cogeneration, in particular to a reduction device and a reduction method, a gas power machine and a boiler thermoelectric supply system and a boiler thermoelectric supply method.
Background
A thermoelectric supply system is a system that generates thermal energy and electric energy using primary energy such as natural gas, which are indispensable parts for residential life and social production, and can supply electricity to residents, factories, and the like in an area to supply daily life needs and heat energy to heat in winter.
Generally, the thermoelectric supply system includes a gas boiler, a water supply device, a fan, etc., wherein the water supply device, the fan, etc., are generally driven by external power, which, on one hand, has high power consumption and high power consumption cost, and on the other hand, in areas where power is scarce or power supply is unstable, it is difficult to ensure smooth operation of the thermoelectric supply system.
In addition, a gas power machine of the thermoelectric supply system can generate a large amount of waste gas in the working process, and the waste gas contains high-concentration nitrogen oxides which can not be effectively removed through heat exchange of a boiler, so that the waste gas directly enters the atmosphere to pollute the environment. For this reason, the conventional thermoelectric supply system is provided with a reduction device, and the removal of nitrogen oxides is realized by adding a catalyst to cause an oxidation-reduction reaction of nitrogen oxides in the exhaust gas. However, since the active components of the catalyst include transition metals such as Cu, mn, fe, ni, and Co, rare earths such as Ce, la, nd, in, and Y, and precious metals such as Pd, pt, and Rh, the use cost of the catalyst is high, which leads to an increase In the economic cost of the thermoelectric supply system.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects that the reduction device in the prior art removes nitrogen oxides through a catalyst, so that the system operation cost is higher, the auxiliary device of the thermoelectric supply system needs to be driven by external power, the power consumption cost is high, and the influence of the external power supply system is large, so as to provide a reduction device and a reduction method which have lower system operation cost, high removal rate of nitrogen oxides in exhaust gas, and are not influenced by the external power supply system, and a gas power machine and a boiler thermoelectric supply system and a method.
To this end, the present invention provides a reducing apparatus for reducing exhaust gas, comprising: the casing is in with setting just first cavity, second cavity and the third cavity that communicates in proper order in the casing, first cavity has waste gas air inlet and first gas air inlet, the third cavity has second gas air inlet and waste gas outlet.
Optionally, the first gas inlet is arranged between the first cavity and the second cavity and is inclined towards the first cavity; the second gas intake port is disposed between the second cavity and the third cavity, and is disposed obliquely toward the third cavity.
Optionally, an acute included angle between the injection direction of the first fuel gas inlet and the axial direction of the shell is [30 degrees, 45 degrees ]; an acute included angle between the injection direction of the second gas inlet and the axial direction of the shell is [45 degrees ] and [ 60 degrees ].
Optionally, the first cavity length is [20%,25% ] of the housing length, the second cavity length is [25%,30% ] of the housing length, and the third cavity length is [45%,55% ] of the housing length.
Optionally, the number of the first gas inlets is at least four, and the first gas inlets are arranged at intervals along the circumferential direction of the inner wall of the shell; the number of the second gas inlets is at least four, and the second gas inlets are arranged along the circumferential direction of the inner wall of the shell at intervals.
Optionally, a cavity is provided between the outer wall and the inner wall of the housing.
Optionally, the cavity has an air inlet.
Optionally, the number of the exhaust gas outlets is multiple, and the exhaust gas outlets are arranged at intervals along the circumferential direction of the shell.
A reduction method of the reduction device comprises the following steps:
after the waste gas and the fuel gas are mixed in the first cavity to form a waste gas and fuel gas mixture, the waste gas and the fuel gas enter the second cavity;
the waste gas and fuel gas mixture is combusted in the second cavity, oxygen in the waste gas and fuel gas mixture is exhausted, the temperature of the waste gas and fuel gas mixture is raised to be above 800 ℃, high-temperature waste gas is formed, and the high-temperature waste gas enters a third cavity;
the high-temperature waste gas is contacted with fuel gas to reduce nitrogen oxides in the high-temperature waste gas;
and discharging the high-temperature waste gas after reduction treatment.
A gas power machine and boiler thermoelectric supply system comprises the reduction device, a gas power machine, a power generation device and a boiler, wherein the power output end of the gas power machine is connected with the power input end of the power generation device, the waste gas discharge port of the gas power machine is communicated with the waste gas inlet of the reduction device, a burner is arranged on the boiler, and the gas inlet of the burner is communicated with the waste gas outlet of the reduction device.
Optionally, the water supply device is further included, and a water outlet of the water supply device is communicated with a water inlet of the gas power machine and a water inlet of the boiler.
Optionally, a first control valve is arranged on a pipeline between the water outlet of the water supply device and the water inlet of the gas power machine, and a second control valve is arranged on a pipeline between the water outlet of the water supply device and the water inlet of the boiler.
Optionally, the water outlet of the gas power machine is communicated with the water inlet of the boiler.
Optionally, a third control valve is arranged on a pipeline between the water outlet of the gas power machine and the water inlet of the boiler.
Optionally, still include draught fan and forced draught blower, forced draught blower air inlet and atmosphere intercommunication, forced draught blower air outlet with air inlet and combustor air inlet on reduction plant's the casing communicate with each other, and the boiler gas vent communicates with each other with the draught fan air inlet, and the draught fan air outlet communicates with each other with the atmosphere.
Optionally, the reduction device further comprises a fuel gas supply pipeline, and the fuel gas supply pipeline is communicated with a fuel gas inlet of a fuel gas power machine, a first fuel gas inlet, a second fuel gas inlet and a burner fuel gas inlet of the reduction device.
Optionally, the power output end of the power generation device is connected with at least one of the water supply device, the induced draft fan and the power input end of the blower.
A gas engine and boiler thermoelectric supply method adopts the gas engine and boiler thermoelectric supply system, and comprises the following steps:
the gas power machine drives a power generation device to generate power, the power generation device supplies power to at least one of a blower, an induced draft fan and a water supply device, and the water supply device supplies cold water to the gas power machine and the boiler;
the waste gas discharged by the gas power machine passes through a reduction device;
the high-temperature waste gas treated by the reduction device enters a boiler;
the boiler heats cold water into hot water and outputs the hot water to the outside.
Optionally, the power generation device further supplies power to an external power system.
Optionally, the gas power machine is an internal combustion engine, and the gas consumed by the internal combustion engine accounts for [5%,15% ] of the total gas consumed by the gas power machine and the boiler thermoelectric supply system.
The invention has the following advantages:
1. according to the reduction device provided by the invention, the first cavity, the second cavity and the third cavity are arranged in the shell, waste gas can be mixed with the fuel gas injected from the first fuel gas inlet in the first cavity, and reduction reaction is carried out on the waste gas and the fuel gas injected from the second fuel gas inlet in the third cavity, so that nitrogen oxides in the original waste gas are reduced.
2. According to the reduction device provided by the invention, the first gas inlet is arranged between the first cavity and the second cavity and is obliquely arranged towards the first cavity, and the gas and the waste gas can be fully mixed by obliquely injecting the high-speed gas through the first gas inlet; the second gas inlet is arranged between the second cavity and the third cavity and is obliquely arranged towards the third cavity, the residence time of the gas sprayed into the third cavity through the second gas inlet in the third cavity is longer, the reaction time with the waste gas is longer, the waste gas can be fully reduced, no nitrogen oxide is contained in the discharged gas, and the environment is not polluted.
3. According to the reduction device provided by the invention, the cavity is arranged between the outer wall and the inner wall of the shell and is provided with the air inlet, the inner wall can be cooled by introducing air into the cavity, the shell is prevented from being burnt out by high-temperature waste gas, and the service life of the reduction device is prolonged.
4. According to the reduction method provided by the invention, the waste gas is fully mixed with the fuel gas in the first cavity, then the oxygen in the waste gas is combusted and consumed in the second cavity, the temperature is raised to be high-temperature waste gas, and then the waste gas and the fuel gas are subjected to reduction reaction in the third cavity to reduce the nitrogen oxide in the high-temperature waste gas.
5. The gas power machine and the boiler thermoelectric supply system provided by the invention drive the power generation device to generate electricity through the power device and output electric energy, the boiler can utilize the heat energy in the waste gas discharged by the power device, and the whole system can supply power for external heat supply and meet the regional requirements on the electric energy and the heat energy. Meanwhile, the reduction device can reduce nitrogen oxides in the waste gas discharged by the power device, and the gas discharged into the atmosphere by the system is ensured not to cause air pollution.
6. The gas power machine and the boiler thermoelectric supply method provided by the invention can provide electric energy and heat energy, and simultaneously adjust the thermoelectric supply proportion of the system by adjusting the gas quantity consumed by the internal combustion engine, thereby reasonably distributing the output proportion of the electric energy and the heat energy, ensuring that the full utilization of energy is not wasted, and the reduction rate of waste gas is high, and causing no air pollution.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a reduction apparatus according to the present invention;
FIG. 2 is a schematic diagram of a gas power machine and boiler thermoelectric supply system of the present invention.
Description of reference numerals:
1-reduction device, 101-shell, 102-first cavity, 103-second cavity, 104-third cavity, 105-waste gas inlet, 106-first gas inlet, 107-second gas inlet, 108-waste gas outlet, 109-cavity, 1010-air inlet, 1011-first gas conduit, 1012-second gas conduit;
2-a gas power machine;
3-a power generation device;
4-boiler, 401-burner;
5-a water supply device;
6-a first control valve;
7-a second control valve;
8-a third control valve;
9-a draught fan;
10-a blower;
11-gas supply pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, in the preferred embodiment of the reduction apparatus 1 provided by the present invention, the reduction apparatus 1 can be applied to a thermoelectric supply system to perform reduction treatment on exhaust gas, the reduction apparatus 1 can perform reduction treatment on exhaust gas without adding a reducing agent, reducing cost is saved, and the removal rate of nitrogen oxides is high, so that it can be ensured that the gas discharged into the atmosphere from the thermoelectric supply system does not contain nitrogen oxides, and does not cause air pollution.
The reduction apparatus 1 includes: casing 101 and the first cavity 102, second cavity 103 and the third cavity 104 that set up in casing 101 and communicate in proper order, wherein casing 101 is the hollow tube of both ends open-ended, one end is the waste gas air inlet 105 of first cavity 101, the other end is the waste gas air outlet 108 of third cavity 104, and cavity 109 has between casing 101's outer wall and the inner wall, air inlet 1010 has on the cavity 109, air inlet 1010 is close to waste gas air inlet 105 and sets up, it can cool off casing 101's inner wall to let in the air from air inlet 1010, prevent that casing 101 from being in the high temperature state for a long time and damaging.
In the posture of the reduction apparatus shown in fig. 1, the first cavity 102 is located on the left side of the casing 101, the length of the first cavity 102 is 20% to 25% of the entire length of the casing 101, the first cavity 102 has an exhaust gas inlet 105 and a first gas inlet 106, and the first gas inlet 106 is disposed between the first cavity 102 and the second cavity 103 and is inclined toward the first cavity 102. Specifically, the acute included angle between the injection direction of the first gas inlet 106 and the axial direction of the casing 101 is [30 °,45 °, and the number of the first gas inlets 106 is at least four, and the first gas inlets 106 are arranged at intervals along the circumferential direction of the inner wall of the casing 101. In this embodiment, the length of the first cavity 102 is preferably 20% of the length of the casing 101, the acute included angle between the injection direction of the first gas inlet 106 and the axial direction of the casing 101 is preferably 45 °, four first gas inlets 106 are provided, and the first gas inlets 106 are uniformly arranged along the circumferential direction of the inner wall of the casing 101 at intervals.
Further, the first gas inlet 106 is connected with a first gas conduit 1011, the first gas conduit 1011 has a first horizontal portion and a first inclined portion, wherein the first inclined portion is communicated with the first gas inlet 106, and an acute angle included angle between an axial direction of the first inclined portion and an axial direction of the housing 101 is 45 °; the axis of the first horizontal portion is disposed in parallel with the axial direction of the housing 101, which facilitates arrangement and connection of the first gas duct 1011 and saves installation space. Specifically, since four first gas inlets 106 are provided in this embodiment, the number of the corresponding first gas conduits 1011 is also four, and the four first gas conduits 1011 are respectively connected to the four first gas inlets 106.
The second cavity 103 is in communication with the first cavity 102 and has a length of [25%,30% ] of the length of the housing 101. In this embodiment, the length of the second cavity 103 is preferably 30% of the length of the housing 101, and an ignition device is disposed in the second cavity 103. The second cavity 103 is mainly used for burning the mixed exhaust gas-gas mixture in the first cavity 102 to consume oxygen therein, and heating the exhaust gas-gas mixture to high-temperature exhaust gas, so that the exhaust gas-gas mixture is in a state suitable for reduction reaction, and the reduction reaction is prevented from being affected due to oxygen contained in the exhaust gas-gas mixture and insufficient temperature, and nitrogen oxides are not sufficiently reduced.
The third chamber 104 is located at the right side of the housing 101 and communicates with the second chamber 103, the third chamber 104 has a length [45%,55% ] of the length of the housing 101, and has a second fuel gas inlet 107 and an exhaust gas outlet 108, the second fuel gas inlet 107 being disposed between the second chamber 103 and the third chamber 104 and being disposed obliquely toward the third chamber 103. Specifically, the acute included angle between the injection direction of the second gas inlet 107 and the axial direction of the casing 101 is [45 °,60 ° ], and the number of the second gas inlets is at least four, and the second gas inlets are arranged at intervals along the circumferential direction of the inner wall of the casing; the number of the exhaust gas outlet ports 105 is plural, and also arranged at intervals in the circumferential direction of the casing 101. In the present embodiment, the length of the third cavity 104 is preferably 50% of the length of the casing 101, the acute included angle between the injection direction of the second gas inlet 107 and the axial direction of the casing 101 is 45 °, and the number of the second gas inlet 107 and the number of the exhaust gas outlet 108 are four and are uniformly arranged along the circumferential direction of the inner wall of the casing 101.
Further, a second gas conduit 1012 is connected to the second gas inlet 107, and the second gas conduit 1012 has a second horizontal portion and a second inclined portion, wherein the second inclined portion is communicated with the second gas inlet 107, and an acute included angle between an axis of the second inclined portion and an axial direction of the housing 101 is 45 °; the axis of the second horizontal portion is disposed in parallel with the axial direction of the housing 101, and the first horizontal portion and the second horizontal portion are arranged in parallel, which facilitates the arrangement and connection of the second gas conduit 1012 and saves the installation space. Specifically, since the number of the second fuel gas inlets 107 is four in the present embodiment, the number of the corresponding second fuel gas conduits 1012 is also four, and the four second fuel gas conduits 1012 are respectively connected to the four second fuel gas inlets 107.
The high-temperature waste gas and the fuel gas are mixed and subjected to reduction reaction in the third cavity 104 to reduce nitrogen oxides, the second fuel gas inlet 107 is arranged between the second cavity 103 and the third cavity 104, the fuel gas sprayed out of the second fuel gas inlet 107 enters the third cavity 104 and then immediately contacts the high-temperature waste gas, and the second fuel gas inlet 107 is arranged in a manner that the residence time of the fuel gas in the third cavity 104 is longer; meanwhile, the fuel gas is obliquely injected at an angle of 45 degrees, and can be contacted with high-temperature waste gas more fully. In addition, the length of the third chamber 104 accounts for 50% of the length of the housing, and both of these arrangements result in a longer reaction time for the reduction reaction, thereby ensuring complete reduction of nitrogen oxides in the high-temperature exhaust gas.
In other embodiments, the length of the first cavity 102 may also be 21%, 23%, 25%, etc. of the length of the housing 101; the acute angle included angle between the injection direction of the first gas inlet 106 and the axial direction of the housing 101 may also be 30 °, 35 °,40 °, and the like, the number of the first gas inlets 106 may also be six, eight, and the like, the acute angle included angle between the axial direction of the first inclined portion of the corresponding first gas conduit 1011 and the axial direction of the housing 101 should be the same as the acute angle included angle between the injection direction of the first gas inlet 106 and the axial direction of the housing 101, and the number and the arrangement positions of the first gas conduit 1011 should also correspond to the number and the arrangement positions of the first gas inlets 106.
In other embodiments, the length of the second cavity 102 may also be 25%, 27%, etc. of the length of the housing 101.
In other embodiments, the length of the third cavity 104 may also be 45%,55%, etc. of the length of the housing 101. Further, the acute angle between the injection direction of the second fuel gas intake ports 107 and the axial direction of the housing 101 may be 50 °,55 °,60 °, etc., and the number of the second fuel gas intake ports 107 may be six, eight, etc., and the acute angle between the axial direction of the second inclined portion of the corresponding second fuel gas conduit 1012 and the axial direction of the housing 101 should be the same as the acute angle between the injection direction of the second fuel gas intake ports 107 and the axial direction of the housing 101, and the number and arrangement positions of the second fuel gas conduits 1012 should also correspond to the number and arrangement positions of the second fuel gas intake ports 107. In addition, the number of the exhaust gas outlets 108 may be six, eight, or the like.
The present embodiment further provides a reducing method of the reducing device 1, including the following steps:
(1) After the waste gas and the fuel gas are mixed in the first cavity 102 into a waste gas and fuel gas mixture, the waste gas and the fuel gas enter the second cavity 103;
the exhaust gas containing nitrogen oxides enters the first cavity 102 from the exhaust gas inlet 105, and is fully mixed with the gas injected from the first gas inlet 106, and the mixture is mixed to form an exhaust gas-gas mixture, and the exhaust gas-gas mixture enters the second cavity 103.
(2) The waste gas and fuel gas mixture is combusted in the second cavity 103, oxygen in the waste gas and fuel gas mixture is exhausted, the temperature of the waste gas and fuel gas mixture is raised to be above 800 ℃ to become high-temperature waste gas, and the high-temperature waste gas enters the third cavity 104;
after the exhaust gas-gas mixture enters the second cavity 103, ignition combustion is carried out through an ignition device arranged at the end position of the second cavity 103, oxygen in the exhaust gas mixture is exhausted in the combustion process, meanwhile, the exhaust gas-gas mixture is gradually heated to 800 ℃, and finally high-temperature exhaust gas is formed and enters the third cavity 104.
(3) The high-temperature waste gas contacts with fuel gas to reduce nitrogen oxides in the high-temperature waste gas;
after entering the third cavity 104, the high-temperature exhaust gas contacts with the fuel gas ejected from the second fuel gas inlet 107, and a reduction reaction begins to occur, because in this embodiment, the fuel gas is preferably natural gas, and the main component of the fuel gas is methane (CH) 4 ) The main component of the nitrogen oxide is NO, which will react with CH in the third chamber 104 4 、CH 4 Product of the combustion process CH i And CH 4 CO generated by combustion in the second cavity is subjected to reduction reaction, and finally C is generatedO 2 、N 2 And H 2 O, etc. do not pollute the air.
The chemical reaction formula is as follows:
CH 4 →CH i +H
NO+CH 4 →CH i +N 2 +H 2 O
NO+CH i →CO 2 +N 2 +H 2 O
NO+CO→CO 2 +N 2
(4) And discharging the high-temperature waste gas after reduction treatment.
High-temperature waste gas is discharged through the waste gas outlet after reduction reaction in the third cavity 104, and because the waste gas outlet 108 is provided with a plurality of, the diffusion area of waste gas is increased, and the diffusion effect is better, so that the subsequent high-temperature waste gas after treatment can be conveniently utilized.
As shown in fig. 2, the present embodiment further provides a gas power machine and boiler thermoelectric supply system, which includes a reduction device 1, a gas power machine 2, a power generation device 3, and a boiler 4, wherein a power output end of the gas power machine 2 is connected to a power input end of the power generation device 3, a waste gas discharge port of the gas power machine 2 is communicated with a waste gas inlet 105 of the reduction device 1, and a waste gas outlet 108 of the reduction device 1 is communicated with an inlet of a burner 401 disposed on the boiler 4.
The gas power machine 2 is one or a combination of a plurality of internal combustion engines, gas turbines, or gas stirling engines, in this embodiment, the gas power machine 2 is preferably an internal combustion engine and is disposed in an inlet air duct of a blower 10 of a boiler, the power generation device 3 is preferably a power generator, and the reduction device 1 is the reduction device 1 in this embodiment.
The internal combustion engine converts chemical energy into mechanical energy after gas is introduced, so that the generator is driven to work, the power output end of the generator is connected with at least one of the water supply device, the air feeder and the power input end of the induced draft fan, and self-power supply of a thermoelectric supply system is wholly or partially realized. The internal combustion engine can generate waste gas with higher temperature when in work, the waste gas contains nitrogen oxide, the waste gas is reduced by the reduction device 1 and then is discharged into the combustor 401, and meanwhile, fuel gas is introduced into the combustor 401 for combustion. Finally, the high-temperature exhaust gas reduced by the reduction apparatus 1 and the heat generated by combustion are absorbed and utilized together in the boiler 4.
In addition, the gas power machine and boiler thermoelectric supply system also comprises a water supply device 5, in the embodiment, the water supply device 5 is preferably a water pump, a water inlet of the water pump is connected with an external water source, a water outlet of the water pump is communicated with a water inlet of the gas power machine and a water inlet of the boiler, a water outlet of the gas power machine is also communicated with a water inlet of the boiler, and a water outlet of the boiler is connected to an external water supply pipeline.
Furthermore, a first control valve 6 is arranged on a pipeline between the water outlet of the water pump and the water inlet of the gas power machine; a second control valve 7 is arranged on a pipeline between the water outlet of the water pump and the water inlet of the boiler; and a third control valve 8 is arranged on a pipeline between the water outlet of the gas power machine and the water inlet of the boiler, and the on-off of each pipeline can be controlled by arranging the control valves. The water pump conveys cold water to the gas power machine 2 (i.e. the internal combustion engine) and the boiler 4, and the cold water cools the cylinder sleeve of the internal combustion engine and then is discharged into the boiler 4, so that heat generated by the cylinder sleeve when the internal combustion engine works is utilized, the utilization rate of system heat is improved, and finally the cold water is heated into hot water in the boiler and is discharged.
Furthermore, the gas power machine and boiler thermoelectric supply system further comprises an induced draft fan 9 and a blower 10, wherein an air inlet of the blower is communicated with the atmosphere, an air outlet of the blower is communicated with an air inlet 1010 on the shell 101 of the reduction device 1 and an air inlet of the burner, and air used for cooling the inner wall of the shell 101 is provided for the reduction device 1 and combustion-supporting gas is provided for the burner 401. The air inlet of the induced draft fan is communicated with the exhaust port of the boiler, the air outlet of the induced draft fan is communicated with the atmosphere and used for discharging the gas in the boiler 4 into the atmosphere, and the gas engine and the boiler thermoelectric supply system are provided with the reduction device 1, so that the nitrogen oxides in the waste gas can be removed, and the gas discharged into the atmosphere can not cause pollution.
Furthermore, the gas power machine and boiler thermoelectric supply system further comprises a gas supply pipeline 11, the gas supply pipeline 11 and the gas power machine gas supply pipelineThe gas inlet, the first gas inlet 106 and the second gas inlet 107 of the reduction device 1 and the gas inlet of the burner are communicated, required gas is supplied to the gas power machine 2, the reduction device 1 and the burner 401 through the gas supply pipeline 11, and the gas can be natural gas, artificial gas, coke oven gas, chemical waste gas and the like with the heat value not lower than 1500Kcal/Nm 3 Preferably natural gas in this embodiment.
In other embodiments, gas power machine 2 may be a gas turbine, a gas stirling machine, an internal combustion engine in combination with a gas turbine, or the like.
In other embodiments, the fuel gas may be artificial gas, coke oven gas, or the like.
The embodiment also provides a gas power machine and boiler thermoelectric supply method, which adopts the gas power machine and boiler thermoelectric supply system in the above embodiment, and comprises the following steps:
(1) The gas power machine 2 drives the power generation device 3 to generate power, the power generation device 3 supplies power to at least one of the draught fan 6, the blower 10 and the water supply device 5, and the water supply device 5 supplies cold water to the gas power machine 2 and the boiler 4;
the gas engine 2 is supplied with gas through the gas supply pipe 11, and the gas engine 2 drives the power generation device 3 to generate power, in this embodiment, the gas is preferably natural gas, the gas engine 2 is preferably an internal combustion engine, and the power generation device 3 is preferably a power generator. The generator outputs electric energy to be supplied to at least one of the blower 10, the induced draft fan 9 and the water supply device 5, and can also supply power to an external system, whether the external power supply is supplied or not and the amount of the external power supply can be controlled by adjusting the gas quantity delivered to the internal combustion engine, but the gas quantity consumed by the internal combustion engine accounts for at least 5% of the total gas quantity consumed by the gas power machine and the boiler thermoelectric supply system, and at most does not exceed 15% of the total gas quantity consumed by the gas power machine and the boiler thermoelectric supply system. In the embodiment, the gas consumed by the internal combustion engine accounts for 5% of the total gas consumed by the gas power machine and the boiler thermoelectric supply system, and at the moment, the electric energy output by the generator just meets the electric energy requirements of the blower 10, the draught fan 9 and the water supply device 5.
(2) Waste gas discharged by the gas power machine 2 passes through the reduction device 1;
the internal combustion engine produces high-temperature waste gas during operation, but the waste gas contains nitrogen oxides, in order to utilize the heat of the part, the waste gas needs to be introduced into the reduction device 1 for treatment, when the reduction treatment is carried out, gas needs to be introduced into the reduction device 1 through the gas supply pipeline 11, the introduced gas accounts for 3,9% of the whole system gas consumption, wherein the gas introduced into the first gas inlet 106 accounts for 2,6% of the whole system gas consumption, and the gas introduced into the second gas inlet 107 accounts for 1,3% of the whole system gas consumption. Meanwhile, air is blown into an air inlet 1010 of the reduction device through a blower 10 to cool the inner wall of the shell 101, the amount of the air is [10, 15% ] of the total amount of air required by the boiler 4, and the air is discharged into the combustor 401 as combustion-supporting gas after being cooled.
Specifically, in the present embodiment, the amount of the gas introduced into the reduction device 1 accounts for 9% of the gas consumption of the whole system, wherein the gas introduced into the first gas inlet 106 accounts for 6% of the gas consumption of the whole system, the gas introduced into the second gas inlet 107 accounts for 3% of the gas consumption of the whole system, and the amount of the introduced gas is 10% of the total amount of the air required by the boiler 4.
(3) The high-temperature waste gas treated by the reduction device 1 enters a boiler 4;
the nitrogen oxides in the high-temperature exhaust gas treated by the reduction device 1 are reduced, and the heat of the high-temperature exhaust gas entering the boiler 4 can be utilized. At the same time, the gas supply line 11 supplies gas into the combustor 401, the blower 10 supplies air into the combustor 401, and the heat generated by the combustion of the gas in the combustor 401 is absorbed and utilized by the boiler 4.
(4) The boiler 4 heats the cold water into hot water and outputs the hot water to the outside.
The boiler 4 heats the cold water delivered by the water supply device 2 to the boiler 4 by using high-temperature waste gas and heat generated by combustion of gas in the combustor 401, and meanwhile, because the cylinder sleeve can generate heat when the internal combustion engine works, after the cold water delivered by the water supply device 5 is cooled, the heated water also enters the boiler 4 together, so that the part of heat is also utilized, the amount of the cold water introduced into the internal combustion engine accounts for 1-3% of the amount of the cold water introduced into the boiler, and in the embodiment, the cold water with the amount of 1% of the amount of the cold water introduced into the boiler is introduced into the internal combustion engine. Finally, the cold water is heated together with the warmed water delivered to the boiler 4 by the internal combustion engine to become hot water and is output to an external water supply line.
In other embodiments, the gas engine 2 consumes 6%, 8%, 10%, 15%, etc. of the total gas consumed by the gas engine and the boiler thermoelectric supply system.
In other embodiments, the amount of the gas introduced into the reduction device 1 in the present embodiment accounts for 6%, 7%, 8%, etc. of the gas consumption of the whole system, wherein the gas introduced into the first gas inlet 106 accounts for 2%, 4%, 5%, etc. of the gas consumption of the whole system, the gas introduced into the second gas inlet 107 accounts for 1%, 2%, etc. of the gas consumption of the whole system, and the amount of the introduced gas is 12%, 14%, 15%, etc. of the total amount of the air required by the boiler 4.
In other embodiments, the amount of cold water introduced into the gas power machine 2 can also account for 2% and 3% of the amount of cold water introduced into the boiler 4.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (20)
1. A reduction apparatus for reducing exhaust gas, comprising: the gas-liquid separator comprises a shell (101), and a first cavity (102), a second cavity (103) and a third cavity (104) which are arranged in the shell (101) and sequentially communicated, wherein the first cavity (102) is provided with an exhaust gas inlet (105) and a first fuel gas inlet (106), and the third cavity (104) is provided with a second fuel gas inlet (107) and an exhaust gas outlet (108).
2. A reduction device according to claim 1, characterized in that said first gas inlet (106) is arranged between said first cavity (102) and said second cavity (103) and is inclined towards said first cavity (102); the second gas inlet port (107) is disposed between the second cavity (103) and the third cavity (104), and is disposed obliquely toward the third cavity (104).
3. A reduction apparatus according to claim 2, characterized in that the acute angle between the injection direction of the first gas inlet (106) and the axial direction of the casing (101) is [30 °,45 ° ]; an acute included angle between the injection direction of the second gas inlet (107) and the axial direction of the shell (101) is [45 degrees ] and [ 60 degrees ].
4. The reduction apparatus according to claim 1, wherein the first cavity (102) length is [20%,25% ] of the housing (101) length, the second cavity (103) length is [25%,30% ] of the housing (101) length, and the third cavity (104) length is [45%,55% ] of the housing (101) length.
5. The reduction apparatus according to claim 1, wherein the number of the first gas inlets (106) is at least four, and the first gas inlets are arranged at intervals along the circumferential direction of the inner wall of the casing (101); the number of the second gas inlets (107) is at least four, and the second gas inlets are arranged at intervals along the circumferential direction of the inner wall of the shell (101).
6. Reduction device according to claim 1, characterized in that there is a cavity (109) between the outer and inner walls of the housing (101).
7. A reducing arrangement according to claim 6, characterized in that the cavity (109) has an air inlet (1010).
8. The reduction apparatus according to any one of claims 1 to 7, wherein the exhaust gas outlet port (108) is plural in number and arranged at intervals in a circumferential direction of the casing (101).
9. A reducing method of a reducing apparatus according to any one of claims 1 to 8, comprising:
waste gas and fuel gas are mixed in the first cavity (102) to form a waste gas and fuel gas mixture, and then the mixture enters the second cavity (103);
the waste gas and fuel gas mixture is combusted in the second cavity (103), oxygen in the waste gas and fuel gas mixture is exhausted, the temperature of the waste gas and fuel gas mixture is raised to be above 800 ℃, high-temperature waste gas is formed, and the high-temperature waste gas enters the third cavity (104);
the high-temperature waste gas is contacted with fuel gas to reduce nitrogen oxides in the high-temperature waste gas;
and discharging the high-temperature waste gas after reduction treatment.
10. A gas power machine and boiler thermoelectric supply system is characterized by comprising the reduction device (1) of any one of claims 1 to 8, a gas power machine (2), a power generation device (3) and a boiler (4), wherein the power output end of the gas power machine (2) is connected with the power input end of the power generation device (3), the waste gas discharge port of the gas power machine (2) is communicated with the waste gas inlet (105) of the reduction device (1), the boiler (4) is provided with a burner (401), and the gas inlet of the burner (401) is communicated with the waste gas outlet (108) of the reduction device (1).
11. The gas power machine and boiler thermoelectric supply system according to claim 10, further comprising a water supply device (5), wherein a water outlet of the water supply device is communicated with a water inlet of the gas power machine and a water inlet of the boiler.
12. The gas power machine and boiler thermoelectric supply system according to claim 11, wherein a first control valve (6) is arranged on a pipeline between the water outlet of the water supply device and the water inlet of the gas power machine, and a second control valve (7) is arranged on a pipeline between the water outlet of the water supply device and the water inlet of the boiler.
13. The gas motor and boiler thermoelectric supply system of claim 11, wherein a gas motor water outlet is in communication with the boiler water inlet.
14. The gas engine and boiler thermoelectric supply system according to claim 13, characterized in that a third control valve (8) is arranged on the pipeline between the gas engine water outlet and the boiler water inlet.
15. The gas power machine and boiler thermoelectric supply system of claim 10, further comprising an induced draft fan (9) and an air blower (10), wherein an air inlet of the air blower is communicated with the atmosphere, an air outlet of the air blower is communicated with an air inlet (1010) on the casing (101) of the reduction device (1) and an air inlet of the burner, an air outlet of the boiler is communicated with an air inlet of the induced draft fan, and an air outlet of the induced draft fan is communicated with the atmosphere.
16. The gas engine and boiler thermoelectric feeding system according to claim 10, further comprising a gas supply duct (11), said gas supply duct (11) communicating with a gas engine gas inlet, a first gas inlet (106) and a second gas inlet (107) of said reduction device (1) and a burner gas inlet.
17. Gas engine and boiler thermoelectric supply system according to claim 10, characterized in that the power output of the power generation means (3) is connected with at least one of the power inputs of the water supply means (5), the induced draft fan (9) and the blower (10).
18. A gas power machine and boiler thermoelectric supply method, characterized in that, the gas power machine and boiler thermoelectric supply system of any one of claims 10-17 is adopted, comprising the following steps:
the gas power machine (2) drives the power generation device (3) to generate power, the power generation device (3) supplies power to at least one of the air feeder (10), the draught fan (9) and the water supply device (5), and the water supply device (5) supplies cold water to the gas power machine (2) and the boiler (4);
waste gas discharged by the gas power machine (2) passes through the reduction device (1);
the high-temperature waste gas treated by the reduction device (1) enters a boiler (4);
the boiler (4) heats cold water into hot water and outputs the hot water to the outside.
19. Gas engine and boiler thermoelectric supply method according to claim 18, characterized in that the power plant (3) also supplies an external electric system.
20. The gas power machine and boiler thermoelectric supply method according to claim 18, characterized in that the gas power machine (2) is an internal combustion engine, and the amount of gas consumed by the internal combustion engine accounts for [5%,15% ] of the total gas consumed by the gas power machine and boiler thermoelectric supply system.
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| CN202211090161.5A CN115573795A (en) | 2022-09-07 | 2022-09-07 | Reduction device and method, gas power machine and boiler thermoelectric supply system and method |
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| CN202211090161.5A CN115573795A (en) | 2022-09-07 | 2022-09-07 | Reduction device and method, gas power machine and boiler thermoelectric supply system and method |
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