CN108800958A - A kind of brick/tile kiln flue gas recirculation utilizes device and control method - Google Patents
A kind of brick/tile kiln flue gas recirculation utilizes device and control method Download PDFInfo
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- CN108800958A CN108800958A CN201810655875.3A CN201810655875A CN108800958A CN 108800958 A CN108800958 A CN 108800958A CN 201810655875 A CN201810655875 A CN 201810655875A CN 108800958 A CN108800958 A CN 108800958A
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- Prior art keywords
- magnetic valve
- way magnetic
- flue gas
- tracheae
- controller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0031—Regulation through control of the flow of the exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
- F27D2019/004—Fuel quantity
- F27D2019/0043—Amount of air or O2 to the burner
Abstract
The invention discloses a kind of brick/tile kiln flue gas recirculations to utilize device, including smoke gas afterheat heat exchanger, and the recycling of flue gas heat is realized by smoke gas afterheat heat exchanger；The opening and closing degree that the first three-way magnetic valve, the second three-way magnetic valve are controlled by controller, can adjust the ratio of flue gas recirculation；The large particle in flue gas is removed by filter bag dust-extraction unit；The solid particulate matter in part of smoke can be recycled by cigarette ash processing pond, and usually contains heavy metal in solid particulate matter, and then reaches recycling for heavy metal；Nitric oxide, the nitrogen dioxide in gas are removed by denitrification apparatus, finally it is discharged into air, to realize the environmentally friendly emissions standard of the low nitre of low-sulfur, simultaneously sodium hydroxide in denitrification apparatus can be reacted to the sodium nitrate generated using inspissator with nitrogen dioxide and be condensed into crystal grain object, realize recycling for nitrogen.
Description
Technical field
The present invention relates to flue gas heat recovery system technical field more particularly to a kind of brick/tile kiln flue gas recirculation profits
With device and control method.
Background technology
Brick and tile kiln is used for firing brick-and tile, and many flue gases are will produce in sintering procedure, and existing flue gas generally passes through desulfurization
It is directly discharged in air after processing, wastes many heats while increasing the burden of desulphurization plant.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose that a kind of brick/tile kiln flue gas recirculation utilizes device and control method.
A kind of brick/tile kiln flue gas recirculation according to the ... of the embodiment of the present invention utilizes device, and brick/tile kiln includes：Drying room, roasting
Room is burnt, one end of the drying room is connected to by circulation air path with firing chamber, and the drying room other end is connected with humidity discharging room, institute
The exit for stating humidity discharging room is connected with the first wind turbine, desulfurizer in turn, and flue gas recirculation processing is equipped with inside the firing chamber
Device, the second wind turbine, combustion chamber, the first temperature sensor, inlet end and the desulfurizer of the flue gas recirculation processing unit connect
Logical, the exhaust outlet of flue gas recirculation processing unit is connected to the second wind turbine, the exhaust outlet and combustion chamber of second wind turbine, institute
The first temperature sensor is stated to be located at combustor exit；
The flue gas recirculation processing unit includes smoke gas afterheat heat exchanger, filter bag dust-extraction unit, denitrification apparatus, the flue gas
The inlet end of afterheat heat exchanger is connected to by the first tracheae with desulfurizer, and the one or three energization is equipped in the middle part of first tracheae
The third interface end of magnet valve, first three-way magnetic valve connects the second three-way magnetic valve by tracheae, and the described 2nd 3 is powered
The second interface end of magnet valve is connected with the second tracheae, the third wind turbine that the other end of second tracheae is connected with, the third
The input terminal of wind turbine connects with air, and the third interface end of second three-way magnetic valve is connected by third tracheae and the second wind turbine
It connects；
The exhaust outlet of the smoke gas afterheat heat exchanger is connected to by the 4th tracheae with the inlet end of filter bag dust-extraction unit, described
The exhaust outlet of filter bag dust-extraction unit is connected to by tracheae with denitrification apparatus air inlet, and exhaust outlet and the air of the denitrification apparatus connect
It is logical；
Further include controller, the controller and the first wind turbine, the second wind turbine, third wind turbine, the first three-way magnetic valve,
Two three-way magnetic valves are all made of signal control connection, and controller is connect with the first temperature sensor signal.
Preferably, the smoke gas afterheat heat exchanger includes water tank, heating heat exchanger, and heat exchange is equipped with inside the water tank
Radiator, the inlet end of the heat exchanging radiator are connect with the first tracheae, and the exhaust outlet of heat exchanging radiator is connect with the 4th tracheae,
The water outlet of the water tank is connected to warm with the water inlet of heat exchanger by the first water pipe, and the water inlet of the water tank passes through second
Water pipe is connect with the water outlet of heating heat exchanger, is equipped with the first water pump in the middle part of second water pipe, in first water pipe
The third three-way magnetic valve that portion is connected with, the third interface end of the third three-way magnetic valve are equipped with the second water pump, and described
One water pump, the second water pump, third three-way magnetic valve are controlled with controller and are connected.
Preferably, second temperature sensor, the second temperature sensor and control are installed in the middle part of the 4th tracheae
Device signal connects.
Preferably, the smoke gas afterheat heat exchanger further includes water softener, and the water softener is mounted in the middle part of the second water pipe.
Preferably, first temperature sensor, second temperature sensor are all made of thermocouple temperature sensor.
Preferably, filter bag dust-extraction unit lower end is equipped with ash hole, and cigarette ash processing pond is equipped on the downside of the ash hole.
Preferably, the denitrification apparatus side is equipped with inspissator, and the inspissator is connected with denitrification apparatus by anti-corrosion pipeline
It connects.
A kind of brick/tile kiln flue gas recirculation according to the ... of the embodiment of the present invention utilizes the control method of device, including following step
Suddenly：
S1：The valve core rotation that the second three-way magnetic valve is controlled by controller, makes third tracheae and the second tracheae, the one or three
Three-way electromagnetic valve is connected to；The first wind turbine, the second wind turbine, the operating of third wind turbine are controlled by controller；Pass through controller control the
The valve core rotation of one three-way magnetic valve makes the exhaust outlet of desulfurizer connect with smoke gas afterheat heat exchanger, the second three-way magnetic valve
It is logical；Control two orifices being connect with the first water pipe of third three-way magnetic valve by controller, third three-way magnetic valve and
The interface of second water pump connection is in closed state, and controls the first pump operation.
S2：When the first temperature sensor detects that the temperature for the gas being discharged in combustion chamber reaches firing chamber's maximum temperature
When, the valve core rotation of the second three-way magnetic valve is controlled by controller, and the second three-way magnetic valve is made to be connect with what the second tracheae was connected to
Mouthful flow decline, make the flow rising for the interface that the second three-way magnetic valve is connected to the first three-way magnetic valve.
S3：When the first temperature sensor detects that the temperature for the gas being discharged in combustion chamber is less than firing chamber's minimum temperature
When, the valve core rotation of the second three-way magnetic valve is controlled by controller, and the second three-way magnetic valve is made to be connect with what the second tracheae was connected to
Mouthful flow rise, make the flow decline for the interface that the second three-way magnetic valve is connected to the first three-way magnetic valve.
S4：When second temperature sensor detects the temperature of the flue gas of smoke gas afterheat heat exchanger discharge higher than the setting highest temperature
When spending, controller controls the second pump operation, while the valve core rotation of controller control third three-way magnetic valve, makes the second water pump
Output end is connected to the first water pipe.
S5：When second temperature sensor detects the temperature of the flue gas of smoke gas afterheat heat exchanger discharge higher than setting lowest temperature
When spending, controller controls the second water pump and is stopped, while the valve core rotation of controller third three-way magnetic valve, makes third threeway
The interface that solenoid valve is connect with the second water pump is in closed state.
Compared with prior art, beneficial effects of the present invention：The second wind turbine, the operating of third wind turbine are controlled by controller,
Combustion chamber is admitted air into, air is heated in the combustion chamber, and the air after heating enters the roast area of firing chamber, roasting
The gas of discharge by circulation air path flow to drying room, dry indoor gas to brick dry after flow to humidity discharging room, humidity discharging
Indoor gas is transmitted to by the first wind turbine in desulfurizer again, and desulfurizer passes through the first tracheae after carrying out desulfurization to gas
It is discharged in flue gas recirculation processing unit, wherein controller controls the first three-way magnetic valve, the second three-way magnetic valve is in half-open shape
State makes a first endotracheal flue gas part enter in smoke gas afterheat heat exchanger, and flue gas heat is realized by smoke gas afterheat heat exchanger
The recycling of amount, the flue gas after cooling remove the large particle in flue gas using filter bag dust-extraction unit, and the flue gas after dedusting is again
Nitric oxide, nitrogen dioxide in gas are removed by denitrification apparatus, is finally discharged into air, to realize the low nitre of low-sulfur
Environmentally friendly emissions standard；First endotracheal flue gas another part flows to the second threeway by the third interface of the first three-way magnetic valve
In solenoid valve, while third wind turbine enters the second interface of the second three-way magnetic valve by the second tracheae, mixed with above-mentioned flue gas
Close, and by the second three-way magnetic valve third interface on third tracheae arrange to the second wind turbine, after the second wind turbine will mix
Gas arrange to combustion chamber, gas is heated in combustion chamber, to realize purpose that flue gas recirculation utilizes.Pass through the heating that exchanges heat
The setting of piece can increase the contact area of circulating liquid in flue gas and water tank, improve heat recovery and utilization rate, by first
Water pipe, the second water pipe, the first water pump realize that the cycle of transmitting medium can by the setting of third three-way magnetic valve, the second water pump
To supplement medium.By the setting of second temperature sensor, the temperature of flue gas before can detecting into filter bag dust-extraction unit
Whether degree is more than filter bag heat resisting temperature, when the temperature that second temperature sensor detects is higher than setting value, second temperature sensing
Device sends signal to controller, and the interface that controller control third three-way magnetic valve is connected to the second water pump is opened, controlled simultaneously
First water pump, the second water pump accelerated service improve the circulation rate of recirculated water in smoke gas afterheat heat exchanger, and flue gas is rushed to reduce
The temperature of the flue gas of afterheat heat exchanger discharge, and then prevent the filter bag of the bad filter bag dust-extraction unit of flue gas.By water softener set
It sets, the hardness of recirculated water can be reduced, carbonate is avoided to generate fouling in water pipe, water tank.It can be returned by cigarette ash processing pond
The solid particulate matter in part of smoke is received, and usually contains heavy metal in solid particulate matter, and then reaches the cycle of heavy metal
It utilizes.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram of brick/tile kiln proposed by the present invention；
Fig. 2 is the structural schematic diagram that a kind of brick/tile kiln flue gas recirculation proposed by the present invention utilizes device.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, purport
For explaining the present invention, and it is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Referring to Fig.1-2, a kind of brick/tile kiln flue gas recirculation utilizes device, and brick/tile kiln includes：Drying room 2, firing chamber 1,
One end of the drying room 2 is connected to by circulation air path 3 with firing chamber 1, and 2 other end of the drying room is connected with humidity discharging room 4, institute
The exit for stating humidity discharging room 4 is connected with the first wind turbine 5, desulfurizer 6 in turn, and flue gas recirculation is equipped with inside the firing chamber 1
Processing unit 8, the second wind turbine 7, combustion chamber 9, the first temperature sensor 10, the inlet end of the flue gas recirculation processing unit 8 with
Desulfurizer 6 is connected to, and the exhaust outlet of flue gas recirculation processing unit 8 is connected to the second wind turbine 7, the exhaust outlet of second wind turbine 7
It is connected to combustion chamber 9, first temperature sensor 10 is located at 9 exit of combustion chamber；
The flue gas recirculation processing unit 8 includes smoke gas afterheat heat exchanger 82, filter bag dust-extraction unit 810, denitrification apparatus
811, the inlet end of the smoke gas afterheat heat exchanger 82 is connected to by the first tracheae 81 with desulfurizer 6, first tracheae 81
Middle part is equipped with the first three-way magnetic valve 83, and the third interface end of first three-way magnetic valve 83 connects the two or three by tracheae
The second interface end of three-way electromagnetic valve 85, second three-way magnetic valve 85 is connected with the second tracheae 86, second tracheae 86
The third wind turbine 87 that the other end is connected with, input terminal and the air of the third wind turbine 87 connect, second three-way magnetic valve 85
Third interface end connect with the second wind turbine 7 by third tracheae 84；
The exhaust outlet of the smoke gas afterheat heat exchanger 82 is connected by the inlet end of the 4th tracheae 88 and filter bag dust-extraction unit 810
Logical, the exhaust outlet of the filter bag dust-extraction unit 810 is connected to by tracheae with 811 air inlet of denitrification apparatus, the denitrification apparatus 811
Exhaust outlet and atmosphere；
Further include controller, the controller and the first wind turbine 5, the second wind turbine 7, third wind turbine 87, the first threeway electromagnetism
Valve 83, the second three-way magnetic valve 85 are all made of signal control connection, and controller is connect with 10 signal of the first temperature sensor.
The brick/tile kiln flue gas recirculation of the present invention is using in the specific workflow of device：The second wind is controlled by controller
Machine, the operating of third wind turbine, admit air into combustion chamber, air is heated in the combustion chamber, and the air after heating enters roasting
The roast area for burning room, roast the gas of discharge by circulation air path flow to drying room, dry indoor gas and brick dried
After flow to humidity discharging room, the indoor gas of humidity discharging is transmitted to by the first wind turbine in desulfurizer again, desulfurizer to gas carry out
It is discharged in flue gas recirculation processing unit by the first tracheae after desulfurization, wherein controller controls the first three-way magnetic valve, the two or three
Three-way electromagnetic valve is in half-open position, so that a first endotracheal flue gas part is entered in smoke gas afterheat heat exchanger, more than flue gas
Heat exchanger realizes the recycling of flue gas heat, and the flue gas after cooling removes the bulky grain in flue gas using filter bag dust-extraction unit
Object, the flue gas after dedusting remove nitric oxide, nitrogen dioxide in gas by denitrification apparatus again, are finally discharged into air,
To realize the environmentally friendly emissions standard of the low nitre of low-sulfur；First endotracheal flue gas another part pass through the first three-way magnetic valve
Three interfaces flow in the second three-way magnetic valve, while third wind turbine is connect by the second tracheae into the second of the second three-way magnetic valve
Mouthful, mixed with above-mentioned flue gas, and by the second three-way magnetic valve third interface on third tracheae arrange to the second wind turbine,
Second wind turbine arranges mixed gas to combustion chamber, and gas is heated in combustion chamber, to realize what flue gas recirculation utilized
Purpose.
In some embodiments of the invention, the smoke gas afterheat heat exchanger 82 includes water tank 821, heating heat exchanger
825, heat exchanging radiator 822, the inlet end of the heat exchanging radiator 822 and the first tracheae 81 are installed inside the water tank 821
Connection, the exhaust outlet of heat exchanging radiator 822 are connect with the 4th tracheae 88, and the water outlet of the water tank 821 passes through the first water pipe 826
It is connected to the water inlet of heat exchanger with warm, the water inlet of the water tank 821 passes through the second water pipe 823 and heating heat exchanger 825
Water outlet connection, the middle part of second water pipe 823 is equipped with the first water pump 824, and first water pipe, 826 middle part is connected with
Third three-way magnetic valve 827, the third interface end of the third three-way magnetic valve 827 are equipped with the second water pump 828, and described first
Water pump 824, the second water pump 828, third three-way magnetic valve 827 are controlled with controller and are connected.By the setting of heat exchanging radiator,
The contact area of circulating liquid in flue gas and water tank can be increased, improve heat recovery and utilization rate, by the first water pipe, second
Water pipe, the first water pump realize that the cycle of transmitting medium can be to medium by the setting of third three-way magnetic valve, the second water pump
It is supplemented.
In some embodiments of the invention, 88 middle part of the 4th tracheae is equipped with second temperature sensor 89, described
Second temperature sensor 89 is connect with controller signals.By the setting of second temperature sensor, it can detect and be removed into filter bag
Whether the temperature of flue gas is more than filter bag heat resisting temperature before dirt device, when the temperature that second temperature sensor detects is higher than setting value
When, second temperature sensor sends signal to controller, and controller control third three-way magnetic valve connects with what the second water pump was connected to
Mouth is opened, while controlling the first water pump, the second water pump accelerated service, improves the cycle speed of recirculated water in smoke gas afterheat heat exchanger
Degree to reduce the temperature for the flue gas for rushing smoke gas afterheat heat exchanger discharge, and then prevents the filter bag of the bad filter bag dust-extraction unit of flue gas.
In some embodiments of the invention, the smoke gas afterheat heat exchanger 82 further includes water softener 829, the water softener
829 are mounted on 823 middle part of the second water pipe.By water softener setting, the hardness of recirculated water can be reduced, carbonate is avoided to exist
Fouling is generated in water pipe, water tank.
In some embodiments of the invention, first temperature sensor 10, second temperature sensor 89 are all made of heat
Galvanic couple temperature sensor.More stable measurement performance, using flexible, reliability can be made high using thermocouple temperature sensor.
In some embodiments of the invention, 810 lower end of filter bag dust-extraction unit is equipped with ash hole, under the ash hole
Side is equipped with cigarette ash processing pond 813.It can recycle the solid particulate matter in part of smoke by cigarette ash processing pond, and solid particle
Heavy metal is usually contained in object, and then reaches recycling for heavy metal.
In some embodiments of the invention, 811 side of the denitrification apparatus is equipped with inspissator 812, the inspissator 812
It is connect by anti-corrosion pipeline with denitrification apparatus 811.It can effectively be deviate from flue gas by the setting of denitrification apparatus and contain nitrogen
Body, and using inspissator sodium hydroxide in denitrification apparatus can be reacted to the sodium nitrate generated with nitrogen dioxide and be condensed into crystal
Grain object, realizes recycling for nitrogen.
Referring to Fig.1-2, a kind of brick/tile kiln flue gas recirculation utilizes the control method of device, includes the following steps：
S1：The valve core rotation that the second three-way magnetic valve 85 is controlled by controller, make third tracheae 84 and the second tracheae 86,
First three-way magnetic valve 83 is connected to；The first wind turbine 5, the second wind turbine 7, third wind turbine 87 are controlled by controller to operate；Pass through
Controller controls the valve core rotation of the first three-way magnetic valve 83, makes the exhaust outlet of desulfurizer 6 and smoke gas afterheat heat exchanger 82, the
Two three-way magnetic valves 85 are connected to；Two connect with the first water pipe 826 by controller control third three-way magnetic valve 827 connect
Mouth connection, the interface that third three-way magnetic valve 827 is connect with the second water pump 828 is in closed state, and controls the first water pump 824
Operating.By adjusting the ratio of the flue gas being discharged from the first three-way magnetic valve and the air being passed through from third tracheae, make combustion chamber
Inside there is sufficient oxygen, to achieve the purpose that heating, while some high-temperature flue gas can flow to combustion chamber, improve and enter burning
The bulk temperature of indoor gas reduces the usage amount of coal in combustion chamber, reaches energy-efficient purpose.
S2：When the first temperature sensor 10 detects that the temperature for the gas being discharged in combustion chamber 9 reaches 1 highest temperature of firing chamber
When spending, the valve core rotation of the second three-way magnetic valve 85 is controlled by controller, makes the second three-way magnetic valve 85 and the second tracheae 86
The flow of the interface of connection declines, on the flow for making the interface that the second three-way magnetic valve 85 is connected to the first three-way magnetic valve 83
It rises.By the content of reduction burning indoor oxygen, lower coal burning degree in combustion chamber, and then reduces combustion chamber and gas is discharged
Temperature.
S3：When the first temperature sensor 10 detects that the temperature for the gas being discharged in combustion chamber 9 is less than 1 lowest temperature of firing chamber
When spending, the valve core rotation of the second three-way magnetic valve 85 is controlled by controller, makes the second three-way magnetic valve 85 and the second tracheae 86
The flow of the interface of connection rises, under the flow for making the interface that the second three-way magnetic valve 85 is connected to the first three-way magnetic valve 83
Drop.By the content of raising burning indoor oxygen, keep coal burning in combustion chamber more vigorous, and then improves combustion chamber and gas is discharged
The temperature of body.
S4：When second temperature sensor 89 detects the temperature for the flue gas that smoke gas afterheat heat exchanger 82 is discharged most higher than setting
When high-temperature, controller controls the operating of the second water pump 828, while the valve core rotation of controller control third three-way magnetic valve 827,
828 output end of the second water pump is set to be connected to the first water pipe 826.Low-temperature circulating water is supplemented into water tank by the second water pump, is lowered
The bulk temperature of recirculated water, and then the temperature for rushing the flue gas being discharged in smoke gas afterheat heat exchanger is reduced, avoid high-temperature flue gas from scorching
Filter bag dust-extraction unit.
S5：When second temperature sensor 89 detects the temperature for the flue gas that smoke gas afterheat heat exchanger 82 is discharged most higher than setting
When low temperature, controller controls the second water pump 828 and is stopped, while the valve core rotation of controller third three-way magnetic valve 827,
The interface that third three-way magnetic valve 827 is connect with the second water pump 828 is set to be in closed state.It controls, makes more than flue gas in this way
The heat that heat exchanger heat exchange obtains can long distance transmission, and apply in heating heat exchanger.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of brick/tile kiln flue gas recirculation utilizes device, which is characterized in that brick/tile kiln includes：Drying room (2), firing chamber
(1), one end of the drying room (2) is connected to by circulation air path (3) with firing chamber (1), drying room (2) other end connection
There are humidity discharging room (4), the exit of the humidity discharging room (4) to be connected with the first wind turbine (5), desulfurizer (6), the firing chamber in turn
(1) internal that flue gas recirculation processing unit (8), the second wind turbine (7), combustion chamber (9), the first temperature sensor (10), institute are installed
The inlet end for stating flue gas recirculation processing unit (8) is connected to desulfurizer (6), the exhaust outlet of flue gas recirculation processing unit (8) with
Second wind turbine (7) is connected to, and the exhaust outlet of second wind turbine (7) is connected to combustion chamber (9), first temperature sensor (10)
Positioned at combustion chamber (9) exit；
The flue gas recirculation processing unit (8) includes smoke gas afterheat heat exchanger (82), filter bag dust-extraction unit (810), denitrification apparatus
(811), the inlet end of the smoke gas afterheat heat exchanger (82) is connected to by the first tracheae (81) with desulfurizer (6), and described
The first three-way magnetic valve (83) is installed in the middle part of one tracheae (81), the third interface end of first three-way magnetic valve (83) passes through
Tracheae connects the second three-way magnetic valve (85), and the second interface end of second three-way magnetic valve (85) is connected with the second tracheae
(86), the third wind turbine (87) that the other end of second tracheae (86) is connected with, the input terminal of the third wind turbine (87) with
Air connects, and the third interface end of second three-way magnetic valve (85) is connect by third tracheae (84) with the second wind turbine (7)；
The inlet end that the exhaust outlet of the smoke gas afterheat heat exchanger (82) passes through the 4th tracheae (88) and filter bag dust-extraction unit (810)
Connection, the exhaust outlet of the filter bag dust-extraction unit (810) are connected to by tracheae with denitrification apparatus (811) air inlet, the denitration
The exhaust outlet and atmosphere of device (811)；
Further include controller, the controller and the first wind turbine (5), the second wind turbine (7), third wind turbine (87), the one or three energization
Magnet valve (83), the second three-way magnetic valve (85) are all made of signal control connection, controller and the first temperature sensor (10) signal
Connection.
2. a kind of brick/tile kiln flue gas recirculation according to claim 1 utilizes device, it is characterised in that：The fume afterheat
Heat exchanger (82) includes water tank (821), heating heat exchanger (825), and heat exchanging radiator is equipped with inside the water tank (821)
(822), the inlet end of the heat exchanging radiator (822) is connect with the first tracheae (81), the exhaust outlet of heat exchanging radiator (822) with
4th tracheae (88) connects, and the water outlet of the water tank (821) is connected by the water inlet of the first water pipe (826) and warm heat exchanger
Logical, the water inlet of the water tank (821) is connect by the second water pipe (823) with heating with the water outlet of heat exchanger (825), described
First water pump (824) is installed, the three or three be connected in the middle part of first water pipe (826) is powered in the middle part of the second water pipe (823)
The third interface end of magnet valve (827), the third three-way magnetic valve (827) is equipped with the second water pump (828), first water pump
(824), the second water pump (828), third three-way magnetic valve (827) are controlled with controller and are connected.
3. a kind of brick/tile kiln flue gas recirculation according to claim 2 utilizes device, it is characterised in that：4th tracheae
(88) middle part is equipped with second temperature sensor (89), and the second temperature sensor (89) connect with controller signals.
4. a kind of brick/tile kiln flue gas recirculation according to claim 2 utilizes device, it is characterised in that：The fume afterheat
Heat exchanger (82) further includes water softener (829), and the water softener (829) is mounted in the middle part of the second water pipe (823).
5. a kind of brick/tile kiln flue gas recirculation according to claim 1 utilizes device, it is characterised in that：First temperature
Sensor (10), second temperature sensor (89) are all made of thermocouple temperature sensor.
6. a kind of brick/tile kiln flue gas recirculation according to claim 1 utilizes device, it is characterised in that：The filter bag dedusting
Device (810) lower end is equipped with ash hole, and cigarette ash processing pond (813) is equipped on the downside of the ash hole.
7. a kind of brick/tile kiln flue gas recirculation according to claim 1 utilizes device, it is characterised in that：The denitrification apparatus
(811) side is equipped with inspissator (812), and the inspissator (812) is connect with denitrification apparatus (811) by anti-corrosion pipeline.
8. the brick/tile kiln flue gas recirculation according to any one of claim 1-7 utilizes the control method of device, feature
It is, includes the following steps：
S1：The valve core rotation that the second three-way magnetic valve (85) is controlled by controller, makes third tracheae (84) and the second tracheae
(86), the first three-way magnetic valve (83) is connected to；The first wind turbine (5), the second wind turbine (7), third wind turbine are controlled by controller
(87) it operates；The valve core rotation that the first three-way magnetic valve (83) is controlled by controller, makes the exhaust outlet and cigarette of desulfurizer (6)
Gas afterheat heat exchanger (82), the second three-way magnetic valve (85) are connected to；By controller control third three-way magnetic valve (827) with
Two orifices of the first water pipe (826) connection, the interface that third three-way magnetic valve (827) is connect with the second water pump (828)
In closed state, and controls the first water pump (824) and operate；
S2：When the first temperature sensor (10) detects that the temperature for the gas being discharged in combustion chamber (9) reaches firing chamber (1) highest
When temperature, the valve core rotation of the second three-way magnetic valve (85) is controlled by controller, makes the second three-way magnetic valve (85) and second
The flow of the interface of tracheae (86) connection declines, and the second three-way magnetic valve (85) is made to be connect with what the first three-way magnetic valve (83) was connected to
The flow of mouth rises；
S3：When the first temperature sensor (10) detects that the temperature for the gas being discharged in combustion chamber (9) is minimum less than firing chamber (1)
When temperature, the valve core rotation of the second three-way magnetic valve (85) is controlled by controller, makes the second three-way magnetic valve (85) and second
The flow of the interface of tracheae (86) connection rises, and the second three-way magnetic valve (85) is made to be connect with what the first three-way magnetic valve (83) was connected to
The flow of mouth declines.
9. brick/tile kiln flue gas recirculation according to claim 8 utilizes the control method of device, it is characterised in that:
S4：When second temperature sensor (89) detects the temperature of the flue gas of smoke gas afterheat heat exchanger (82) discharge most higher than setting
When high-temperature, controller controls the second water pump (828) and operates, while the spool of controller control third three-way magnetic valve (827)
Rotation, makes the second water pump (828) output end be connected to the first water pipe (826)；
S5：When second temperature sensor (89) detects the temperature of the flue gas of smoke gas afterheat heat exchanger (82) discharge most higher than setting
When low temperature, controller controls the second water pump (828) and is stopped, while the spool of controller third three-way magnetic valve (827)
Rotation, makes the interface that third three-way magnetic valve (827) is connect with the second water pump (828) be in closed state.
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