CN108854123A - Combustion gas tail gas and high-temperature flue gas mixing jetting drying system and jet drying method - Google Patents
Combustion gas tail gas and high-temperature flue gas mixing jetting drying system and jet drying method Download PDFInfo
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- CN108854123A CN108854123A CN201810799024.6A CN201810799024A CN108854123A CN 108854123 A CN108854123 A CN 108854123A CN 201810799024 A CN201810799024 A CN 201810799024A CN 108854123 A CN108854123 A CN 108854123A
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- 239000007789 gas Substances 0.000 title claims abstract description 214
- 238000001035 drying Methods 0.000 title claims abstract description 98
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000003546 flue gas Substances 0.000 title claims abstract description 78
- 238000002156 mixing Methods 0.000 title claims abstract description 31
- 239000000567 combustion gas Substances 0.000 title abstract description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 70
- 230000001105 regulatory effect Effects 0.000 claims description 46
- 239000003345 natural gas Substances 0.000 claims description 35
- 238000001694 spray drying Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 15
- 230000033228 biological regulation Effects 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 239000002737 fuel gas Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention provides a kind of combustion gas tail gas and high-temperature flue gas mixing jetting drying system and a kind of jet drying method, the jet drying system includes Gas Turbine Generating Units and combustion heating system, it is coupled together between Gas Turbine Generating Units and combustion heating system by components such as threeways, just there are three types of operational modes for tool by the present invention in this way：Gas Turbine Generating Units and combustion heating system, which cooperate, provides thermal energy to drying tower；Or, directly providing thermal energy by combustion heating system；Or, reducing the amount of injection of solvent or diluent.The present invention is due to being additionally provided with combustion heating system; it can provide thermal energy to drying tower as main heating source; again can as auxiliary thermal source cooperation Gas Turbine Generating Units carry out using; the present invention not only operating mode diversification; simultaneously; system reliability of operation is improved, even if there is device fails shutdown, other systems still are able to provide thermal energy guarantee systems stay, steadily run.
Description
Technical Field
The invention relates to the technical field of material drying related equipment, in particular to a mixed jet drying system for fuel gas tail gas and high-temperature flue gas and a jet drying method.
Background
Spray drying is a method for applying systematic technology to material drying. The work flow of the spray drying is as follows: the thin material is atomized and sprayed out of the drying chamber, the sprayed atomized thin material is contacted with hot air, and the moisture in the thin material is quickly vaporized, so that a dried product can be obtained. The spray drying can directly dry the solution and the emulsion into powder or granular products, and can omit the processes of evaporation, crushing and the like.
According to research and research, the existing spray drying tower in the ceramic industry has a large evaporation capacity, and the heat and temperature emitted by the tail gas of the gas turbine cannot be completely matched with the heat requirement of the spray drying tower during full-load operation, so that a combustor afterburning device is required to be added for heat and temperature compensation.
For the prior art, the tail gas of the gas turbine is the main heat source of the spray drying tower, the fuel (natural gas) in the burner afterburning device is combusted by taking the tail gas of the gas turbine as an oxygen source (the tail gas of the gas turbine has about 15% oxygen content), and the fuel (natural gas) only plays a role of supplementing a heat source, once the gas turbine fails, the set of system (including the rear spray drying tower) is completely stopped, and the efficiency of material drying is seriously influenced. The method for solving the above-mentioned situation, the more practical operation is to restart the system and greatly reduce the load carried by the system.
In addition, currently, in the ceramic industry, the thermoelectric ratio of the ceramic industry is large. In the case of a gas turbine option with an electrical load satisfying the requirements of a ceramic factory, the flue gas heat is generally insufficient, and the temperature is not matched, so that a combustor afterburning device needs to be added for heat and temperature compensation.
In summary, how to provide a heat energy compensation system for production in the ceramic industry becomes a problem to be solved urgently by those skilled in the art.
In summary, how to provide a drying system with higher operation reliability becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a gas tail gas and high-temperature flue gas mixed injection drying system which is stable in operation and high in use reliability.
The technical scheme provided by the invention is as follows:
the utility model provides a gas tail gas and high temperature flue gas mixed injection drying system, includes gas turbine generating set and drying tower, the drying tower is including the drying chamber.
Based on the structural design, the invention also provides a combustion heating system, which comprises a high-temperature flue gas channel, wherein the high-temperature flue gas channel comprises a combustion-supporting gas inlet, a high-temperature flue gas outlet and a natural gas inlet, the natural gas inlet is arranged close to the combustion-supporting gas inlet, a combustor is arranged in the high-temperature flue gas channel, and the combustion-supporting gas inlet, the natural gas inlet and the combustor are sequentially arranged along the direction in which the combustion-supporting gas inlet points to the high-temperature flue gas outlet;
the gas turbine generator set comprises a gas tail gas outlet, a regulating tee joint is connected with the gas tail gas outlet, a first pair of interfaces of the regulating tee joint is in butt joint with the gas tail gas outlet, a second pair of interfaces of the regulating tee joint is connected with a first chimney, a third pair of interfaces of the regulating tee joint is connected with a gas tail gas output channel, a first regulating valve used for controlling the second pair of interfaces to be conducted or closed is arranged in the regulating tee joint, and a second regulating valve used for controlling the third pair of interfaces to be conducted or closed is arranged in the regulating tee joint;
a mixing channel is connected with the drying tower, one end of the mixing channel is communicated with the drying chamber, and the other end of the mixing channel is butted with the gas tail gas output channel and the high-temperature flue gas channel;
and a second chimney is connected with the drying tower.
Preferably, the invention further comprises a Y-shaped tee joint, the Y-shaped tee joint comprises a first connecting branch pipe, a second connecting branch pipe and an output pipe, the first connecting branch pipe and the second connecting branch pipe are close to each other and form an acute included angle, the gas tail gas output channel is communicated with the first connecting branch pipe, the high-temperature flue gas channel is communicated with the second connecting branch pipe, and the output pipe is communicated with the mixing channel.
Preferably, a flow mixing plate is arranged in the output pipe.
Preferably, a blower is arranged on the combustion-supporting gas inlet.
Preferably, an induced draft fan is arranged between the drying tower and the second chimney.
Preferably, a third regulating valve for assisting in controlling the conduction or the sealing of the third pair of interfaces is further arranged in the regulating tee.
Preferably, a temperature sensor for regulation is arranged at the position where the drying tower is butted with the mixing channel.
Based on the gas tail gas and high-temperature flue gas mixed jet drying system, the invention also provides a jet drying method, wherein the drying method has the following three operation modes:
when the gas turbine generator set runs at full load, the combustion heating system stops running at the same time, and the running requirement of the drying tower is met by reducing the injection quantity of the thinner;
when the gas turbine generator set stops operating, adjusting the operation of the combustion heating system according to the injection quantity of the thinner to meet the operation requirement of the drying tower;
when the gas turbine generator set operates, the operation of the combustion heating system is adjusted according to the mixed temperature so as to meet the operation requirement of the drying tower.
Preferably, when the gas turbine generator set operates and the temperature of the generated gas tail gas is between 480 and 520 ℃, the combustion temperature-increasing system is controlled to generate high-temperature flue gas at 730 and 780 ℃, and the gas tail gas and the high-temperature flue gas are mixed to form mixed gas at 640-660 ℃.
Through the structural design, in the spray drying method provided by the invention, a mixed spray drying system of gas tail gas and high-temperature flue gas is used for spray drying of thin materials, the spray drying system comprises a gas turbine generator set and a combustion temperature-increasing system, the gas turbine generator set and the combustion temperature-increasing system are coupled together through a tee joint and other components, when the gas turbine generator set normally operates, a first control valve is closed (a first chimney is closed), a second control valve is opened, the gas turbine tail gas is discharged into the rear end, natural gas and air blown in by an air blower are combusted in a combustor to generate high-temperature flue gas (about 750 ℃) which is mixed with the gas turbine tail gas (about 500 ℃), the mixed flue gas is fully mixed through a mixed flow plate, and the mixed flue gas reaches the optimal temperature (about 650 ℃) and enters a spray drying tower. When the gas turbine generator set breaks down, the second control valve and the third control valve are closed, the first control valve is opened (the first chimney is opened), the tail gas of the gas turbine is discharged into the atmosphere through the first chimney, meanwhile, the combustion amount of natural gas is increased, and the heat required by the jet drying tower is completely obtained by burning the natural gas through the burner.
The combustion heating system is additionally arranged, can be used as a main heat source to provide heat energy for the drying tower and can also be used as an auxiliary heat source to be matched with the gas turbine generator set for use.
Drawings
The foregoing features, technical features, advantages and embodiments of the present application will be further described in the following detailed description of the preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic structural diagram of a gas exhaust and high temperature flue gas mixed injection drying system according to an embodiment of the present invention;
the reference numbers illustrate:
the system comprises a gas turbine generator set 1, a drying tower 2, a high-temperature flue gas channel 3, a combustion-supporting gas inlet 3a, a high-temperature flue gas outlet 3b, a natural gas inlet 3c, a combustor 4, a regulating tee joint 5, a first chimney 6, a gas tail gas output channel 7, a first regulating valve 8, a second regulating valve 9, a mixing channel 10, a second chimney 11, a Y-shaped tee joint 12, a mixed flow plate 13, an air blower 14, an induced draft fan 15 and a third regulating valve 16.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a gas exhaust and high temperature flue gas mixing and spraying drying system according to an embodiment of the present invention.
The invention provides a mixed jet drying system for gas tail gas and high-temperature flue gas, which is used for realizing atomization jet drying of ceramic thin materials.
In the present invention, the gas exhaust and high temperature flue gas mixed jet drying system (for convenience of description, the gas exhaust and high temperature flue gas mixed jet drying system is hereinafter referred to as the gas exhaust and high temperature flue gas mixed jet drying system) includes a gas turbine generator set 1 and a drying tower 2.
The gas turbine generator set 1 is a power generation system which drives a generator by using a gas turbine coupling, and the gas turbine drives an impeller to rotate at a high speed by using continuously flowing gas as a working medium, so that fuel energy can be converted into energy in other forms, such as electric energy, tail gas heat energy and kinetic energy of impeller rotation. The invention mainly utilizes the heat energy of the tail gas to dry the thin material.
The drying tower 2 comprises a drying chamber, the thin material is sprayed into the drying chamber in a spraying mode, and the heat energy of the tail gas generated by the gas turbine generator set 1 is transmitted into the drying chamber to dry the thin material.
In the prior art, the tail gas of the gas turbine generator set 1 is used as an oxygen source to participate in the combustion of natural gas, and the heat energy generated by the combustion of the natural gas is only used for heating the tail gas of the gas turbine generator set 1, so that the operation of the system completely depends on whether the gas turbine generator set 1 can normally operate or not.
The invention is different from the prior art in that the invention also provides a set of combustion heating system which operates independently, not only can carry out temperature compensation on the tail gas of the gas turbine generator set 1, but also can be used as an independent heat source to provide heat energy for the operation of the drying tower 2.
Specifically, the combustion heating system comprises a high-temperature flue gas channel 3, and the high-temperature flue gas channel 3 comprises a combustion-supporting gas inlet 3a, a high-temperature flue gas outlet 3b and a natural gas inlet 3 c. The high-temperature flue gas channel 3 is of a tubular structure, a combustion-supporting gas inlet 3a and a high-temperature flue gas outlet 3b are respectively arranged at two ends of the high-temperature flue gas channel, a natural gas inlet 3c is formed in the side wall of the high-temperature flue gas channel 3 and is close to the combustion-supporting gas inlet 3a, a natural gas conveying pipeline is in butt joint with the natural gas inlet 3c, and therefore natural gas can enter the high-temperature flue gas channel 3 from the natural gas inlet 3c in a pipeline conveying mode. Because the natural gas inlet 3c is close to the combustion-supporting gas inlet 3a, the natural gas can be rapidly mixed with the combustion-supporting gas when entering the high-temperature flue gas channel 3, and the subsequent combustion is convenient.
A burner 4 is provided in the high temperature flue gas channel 3 and is defined here: the combustion-supporting gas inlet 3a, the natural gas inlet 3c and the burner 4 are arranged in sequence along the direction that the combustion-supporting gas inlet 3a points to the high-temperature flue gas outlet 3 b. This structural design can guarantee just burning through combustor 4 after natural gas and combustion-supporting gas intensive mixing, can ensure the natural gas intensive combustion like this, improves the utilization ratio of fuel, guarantees simultaneously that the system of heating of burning has heat output reliably.
The combustion heating system provided by the invention can independently operate, can be used as a main heat source to independently provide heat energy for the drying tower 2, and can also be used as an auxiliary heat source to cooperate with the gas turbine generator set 1 to provide heat energy for the drying tower 2.
In order to couple the gas turbine generator set 1 and the combustion warming system together, the invention provides the following optimized design for the gas turbine generator set 1: the gas turbine generator set 1 comprises a gas tail gas outlet, a regulating tee joint 5 is connected with the gas tail gas outlet, a first pair of interfaces of the regulating tee joint 5 is in butt joint with the gas tail gas outlet, a second pair of interfaces of the regulating tee joint 5 is connected with a first chimney 6, a third pair of interfaces of the regulating tee joint 5 is connected with a gas tail gas output channel 7, a first regulating valve 8 used for controlling the second pair of interfaces to be conducted or closed is arranged in the regulating tee joint 5, and a second regulating valve 9 used for controlling the third pair of interfaces to be conducted or closed is arranged in the regulating tee joint 5. The purpose of setting up regulation and control tee bend 5 is in order to make things convenient for the installation of first regulation and control valve 8 and second regulation and control valve 9, and the purpose of setting up first regulation and control valve 8 and second regulation and control valve 9 can seal or open the second of regulation and control tee bend 5 to interface and third.
In the invention, a mixing channel 10 is connected with a drying tower 2, one end of the mixing channel 10 is communicated with a drying chamber, and the other end of the mixing channel 10 is butted with a gas tail gas output channel 7 and a high-temperature flue gas channel 3; meanwhile, a second chimney 11 is connected with the drying tower 2.
Based on the gas tail gas and high-temperature flue gas mixed jet drying system, the invention also provides a jet drying method, and the jet drying method is used for carrying out jet drying on the thin material by using the jet drying system.
In the invention, the use of the mixed jet drying system of the fuel gas tail gas and the high-temperature flue gas mainly comprises the following three schemes:
1. the gas turbine generator set 1 runs at full load, meanwhile, the combustion heating system stops running, and the running requirement of the drying tower 2 is met by reducing the injection quantity of the thinner;
2. when the gas turbine generator set 1 stops operating, the operation of the combustion heating system is adjusted according to the injection quantity of the thinner so as to meet the operation requirement of the drying tower 2;
3. when the gas turbine generator set 1 operates, the operation of the combustion heating system is adjusted according to the mixed temperature so as to meet the operation requirement of the drying tower 2.
In the third scheme, the temperature is taken as a regulation parameter, and the method specifically comprises the following steps: when the gas turbine generator set 1 operates, the temperature of the generated gas tail gas is between 480 and 520 ℃, the combustion heating system is controlled to generate high-temperature flue gas at 730 and 780 ℃, and the gas tail gas and the high-temperature flue gas are mixed to form mixed gas at 640 to 660 ℃. Therefore, the present invention is provided with a temperature sensor for regulation at a position where the drying tower 2 is butted against the mixing passage 10.
In order to avoid the situation that the tail gas generated by the gas turbine generator set 1 is opposite to the high-temperature flue gas generated by the combustion heating system, the invention also provides a Y-shaped tee joint 12, wherein the Y-shaped tee joint 12 comprises a first connecting branch pipe, a second connecting branch pipe and an output pipe, the first connecting branch pipe and the second connecting branch pipe are close to each other and form an acute included angle, a gas tail gas output channel 7 is communicated with the first connecting branch pipe, a high-temperature flue gas channel 3 is communicated with the second connecting branch pipe, and the output pipe is communicated with the mixing channel 10. Utilize Y type tee bend 12 can make tail gas and high temperature flue gas through-flow to carrying, can also carry out the cross mixing simultaneously in order to improve the even degree that tail gas and high temperature flue gas mix, tail gas and high temperature flue gas mix more abundant, the temperature gradient of mist just is littleer, the mist enters into drying tower 2, the drying effect of thin material is just higher.
In order to further improve the mixing uniformity of the tail gas and the high-temperature flue gas, the invention also provides a mixed flow plate 13, and the mixed flow plate 13 is arranged in the output pipe.
In the combustion heating system, natural gas is used as fuel, air is used as combustion-supporting gas, in order to enable the natural gas to be fully combusted, the blower 14 is arranged on the combustion-supporting gas inlet 3a, and the operating power of the blower 14 is controlled according to the input quantity of the natural gas, so that the requirement of full combustion of the natural gas is met. It should be noted that: the blower 14 should also avoid over-running conditions, in order to avoid problems with excessive combustion gas input that reduces the temperature of the high temperature flue gas.
In order to avoid the situation of flue gas backflow in the drying tower 2, the induced draft fan 15 is arranged between the drying tower 2 and the second chimney 11, and the induced draft fan 15 is used for effectively pumping out the gas in the drying tower 2, so that the problem of flue gas backflow is solved.
In this embodiment, a third control valve 16 for assisting in controlling the conduction or the sealing of the third pair of ports is further disposed in the control tee 5. The third regulating valve 16 is arranged, so that the sealing air tightness of the third butt joint port can be improved under the condition that the second regulating valve 9 is not closed tightly, the third butt joint port can be ensured to be closed completely, and the reliability of the invention is ensured.
Specifically, in the present invention, the first control valve 8 is a control valve core for a three-way valve, the second control valve 9 is a flow rate control valve, and the third control valve 16 is a manual cut-off valve. The first control valve 8 (control valve core for three-way valve) is mounted on the control three-way valve 5, so that the control three-way valve 5 is formed with a control valve device having the same function as the three-way valve.
Specifically, in the present invention, the first regulating valve, the second regulating valve and the third regulating valve can also be realized by other implementation manners. The first control valve 8 and the second control valve 9 are integrated into a control valve core for a three-way valve, and the conduction or the sealing of the second pair of interfaces and the third pair of interfaces is simultaneously controlled by the control valve core for the three-way valve. Furthermore, a flow regulating valve is further arranged on the gas tail gas output channel, so that the flow of the gas tail gas in the output channel can be regulated, and the gas tail gas output channel is controlled to be conducted or closed in an auxiliary manner. Furthermore, a third regulating valve is arranged on the gas tail gas output channel and is a manual cut-off valve so as to further assist the switching on and off of the gas tail gas output channel.
The mixed injection drying system for the fuel gas tail gas and the high-temperature flue gas provided by the invention has the following three operation modes:
the situation that the gas turbine runs at full load and the combustor 4 does not run; the rear end spray drying tower 2 can continue to operate by slightly adjusting (reducing the spraying amount of the thinner in the drying chamber);
secondly, when the gas turbine does not operate and the combustor 4 operates, the rear-end injection drying tower 2 can operate at full load;
and thirdly, the full load or partial load operation of the gas turbine and the operation of the combustor 4 (the load can be adjusted) can ensure the full load operation of the spray drying tower 2 by adjusting the proportion of the two.
For the first adjusting mode, when the natural gas passage has a problem, or the combustor has a fault, or a large amount of high-temperature flue gas is not needed in the spray drying tower, the natural gas passage can be closed, and only the waste heat tail gas of the gas turbine is used for drying. As a rule, the gas turbine is operated at substantially full capacity, so that very little is used for the second regulation mode, which is only a backup option in the event of a failure of the gas turbine or in the event of a repair of the combustion engine. For the third operation mode, the invention can be provided with a temperature sensor at the top end of the drying tower 2, and the control unit in the system adjusts the combustion amount of the natural gas through the temperature. The three adjusting modes of the invention can be freely selected and switched according to actual conditions.
Through the structural design, in the spray drying method provided by the invention, the spray drying system for mixing the fuel gas tail gas and the high-temperature flue gas is used for spray drying the thin material, the jet drying system comprises a gas turbine generator set 1 and a combustion heating system, wherein the gas turbine generator set 1 and the combustion heating system are coupled together through a tee joint and other parts, when the gas turbine generator set 1 normally operates, the first control valve is closed (the first chimney 6 is closed), the second control valve and the third control valve are opened, the tail gas of the gas turbine is discharged to the rear end, the natural gas and the air blown by the air blower 14 are combusted in the combustor 4 to generate high-temperature flue gas (about 750 ℃) which is mixed with the tail gas of the gas turbine (about 500 ℃), the mixed flue gas is fully and uniformly mixed through the mixed flow plate 13, and the flue gas reaches the optimal temperature (about 650 ℃) and enters the injection drying tower 2. When the gas turbine generator set 1 breaks down, the second control valve and the third control valve are closed, the first control valve is opened (the first chimney 6 is opened), the tail gas of the gas turbine is discharged into the atmosphere through the first chimney 6, meanwhile, the combustion amount of natural gas is increased, and the heat required by the injection drying tower 2 is completely obtained by burning the natural gas through the combustor 4.
The combustion heating system is additionally arranged, so that the combustion heating system can be used as a main heat source to provide heat energy for the drying tower 2 and can also be used as an auxiliary heat source to be matched with the gas turbine generator set 1 for use.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (10)
1. A mixed injection drying system of gas tail gas and high-temperature flue gas comprises a gas turbine generator set (1) and a drying tower (2), wherein the drying tower comprises a drying chamber and is characterized in that,
the device is characterized by further comprising a combustion heating system, wherein the combustion heating system comprises a high-temperature flue gas channel (3), the high-temperature flue gas channel comprises a combustion-supporting gas inlet (3a), a high-temperature flue gas outlet (3b) and a natural gas inlet (3c), the natural gas inlet is arranged close to the combustion-supporting gas inlet, a combustor (4) is arranged in the high-temperature flue gas channel, and the combustion-supporting gas inlet, the natural gas inlet and the combustor are sequentially arranged along the direction in which the combustion-supporting gas inlet points to the high-temperature flue gas outlet;
the gas turbine generator set comprises a gas tail gas outlet, a regulating tee joint (5) is connected with the gas tail gas outlet, a first pair of interfaces of the regulating tee joint is in butt joint with the gas tail gas outlet, a second pair of interfaces of the regulating tee joint is connected with a first chimney (6), a third pair of interfaces of the regulating tee joint is connected with a gas tail gas output channel (7), a first regulating valve (8) used for controlling the conduction or the sealing of the second pair of interfaces is arranged in the regulating tee joint, and a second regulating valve (9) used for controlling the conduction or the sealing of the third pair of interfaces is arranged in the regulating tee joint;
a mixing channel (10) is connected with the drying tower, one end of the mixing channel is communicated with the drying chamber, and the other end of the mixing channel is butted with the gas tail gas output channel and the high-temperature flue gas channel;
and a second chimney (11) is connected with the drying tower.
2. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 1,
still including Y type tee bend (12), Y type tee bend is including two first connecting branch pipes and second connecting branch pipe and an output tube that are close to each other and are formed with acute angle contained angle, gas tail gas outlet channel with first connecting branch pipe intercommunication, high temperature flue gas passageway with branch pipe intercommunication is connected to the second, the output tube with mixing channel intercommunication.
3. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 1,
a mixed flow plate (13) is arranged in the output pipe.
4. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 1,
and a blower (14) is arranged on the combustion-supporting gas inlet.
5. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 1,
and an induced draft fan (15) is arranged between the drying tower and the second chimney.
6. The gas tail gas and high-temperature flue gas mixing and spraying drying system according to any one of claims 1 to 5,
and a third regulating valve (16) for assisting in controlling the conduction or the sealing of the third pair of interfaces is also arranged in the regulating tee joint.
7. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 6,
and a temperature sensor for regulation and control is arranged at the butt joint position of the drying tower and the mixing channel.
8. The gas tail gas and high-temperature flue gas mixing and spraying drying system of claim 7,
the first regulating valve is a control valve core for a three-way valve, the second regulating valve is a flow regulating valve, and the third regulating valve is a manual cut-off valve;
or,
the first regulating valve and the second regulating valve are integrated into a control valve core for the three-way valve.
9. A spray-drying method is characterized in that,
the gas tail gas and high-temperature flue gas mixed injection drying system of any one of claims 1 to 8 is used for carrying out injection drying on the thin material;
when the gas turbine generator set runs at full load, the combustion heating system stops running at the same time, and the running requirement of the drying tower is met by reducing the injection quantity of the thinner;
when the gas turbine generator set stops operating, adjusting the operation of the combustion heating system according to the injection quantity of the thinner to meet the operation requirement of the drying tower;
when the gas turbine generator set operates, the operation of the combustion heating system is adjusted according to the mixed temperature so as to meet the operation requirement of the drying tower.
10. A spray drying method according to claim 9,
when the gas turbine generator set operates and the temperature of the generated gas tail gas is between 480 and 520 ℃, the combustion heating system is controlled to generate high-temperature flue gas at 730 and 780 ℃, and the gas tail gas and the high-temperature flue gas are mixed to form mixed gas at 640 to 660 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810799024.6A CN108854123A (en) | 2018-07-19 | 2018-07-19 | Combustion gas tail gas and high-temperature flue gas mixing jetting drying system and jet drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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