Kiln flue gas cooling equipment used before desulfurization and denitrification

Abstract

The invention discloses kiln flue gas cooling equipment used before desulfurization and denitrification, relates to the technical field of flue gas cooling, and aims to solve the problems that in float glass kiln flue gas treatment, only a boiler is easy to block, and desulfurization and denitrification temperature requirements are difficult to meet in a shutdown overhaul period. A kiln and a desulfurization and denitrification system are communicated through a smoke inlet pipe and a smoke outlet pipe, a heat exchange assembly is arranged in the device, and a temperature sensor and a control system are matched, so that smoke can be accurately regulated and controlled to be cooled to about 370 DEG C matched with desulfurization and denitrification reaction; the medium pipe fitting, the heat exchange structure and the refrigeration structure are matched to quickly and accurately cool flue gas, the boiler can independently undertake the flue gas cooling task in the overhaul period or work cooperatively with the boiler, flue gas treatment interruption caused by shutdown of the boiler is avoided, the production continuity and the environmental protection compliance are maintained, and the production efficiency is improved. The flue gas cooling device is suitable for various float glass kiln flue gas treatment scenes, and the using effect of the flue gas cooling device is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flue gas cooling, and specifically relates to a flue gas cooling equipment for a kiln before desulfurization and denitrification. BACKGROUND

[0002] Kiln flue gas is a mixed gas discharged from a flue during fuel combustion heat supply or material high-temperature processing of a kiln (such as a float glass production kiln, a metallurgical kiln, a chemical kiln, etc.), and its composition, temperature and characteristics differ with the kiln type, fuel type and processed material; desulfurization and denitrification is a combined process for removing two types of pollutants (mainly SO2 and nitrogen oxides (mainly NO x , NO2) in flue gas through specific technical means, aiming to reduce the pollution of flue gas to the atmosphere (such as reducing the causes of acid rain and haze), and to ensure that the emission meets the environmental protection standards, and is widely used in high-temperature industrial scenes such as float glass kilns, thermal power boilers and steel sintering machines, in float glass production, the kiln flue gas needs to be treated by desulfurization and denitrification to meet the emission standard.

[0003] The existing kiln flue gas treatment often configures a waste heat boiler to recover heat, but the boiler is easy to be blocked by smoke dust, and needs to be stopped for maintenance every 3 months, during the maintenance period, if the flue gas temperature cannot be reduced to the suitable range of desulfurization and denitrification reaction, the desulfurization and denitrification efficiency will be reduced, the emission will be over-standard, and the environmental protection standard and production continuity will be affected, according to the continuous monitoring data of flue gas emission, the flue gas temperature fluctuates greatly during the boiler maintenance period, and exceeds the best reaction temperature range of desulfurization and denitrification in some periods, resulting in unstable pollutant removal efficiency, which cannot meet the needs of people. SUMMARY

[0004] The present application aims to solve the technical problems in the prior art, and therefore proposes a kiln flue gas cooling equipment before desulfurization and denitrification.

[0005] The application discloses a kind of for desulfurization and denitrification front kiln flue gas cooling equipment, including flue gas exchanger main body, into smoke pipe, out of smoke pipe, temperature sensor and control system, several described flue gas exchanger main body is sequentially installed from top to bottom in the inside of equipment shell, the inside of described flue gas exchanger main body is equipped with heat exchange component for heat exchange, the outside of equipment shell is equipped with support frame, and the support frame is equipped with staircase;The one end of the into smoke pipe is arranged in the lower part of the outside of equipment shell and is communicated with flue gas exchanger main body, and the other end of the into smoke pipe is connected kiln flue gas outlet, and kiln flue gas is guided into equipment shell and then enters flue gas exchanger main body;The one end of the out of smoke pipe is arranged in the upper part of the outside of equipment shell and is communicated with flue gas exchanger main body, and the other end of the out of smoke pipe is communicated with the inlet of desulfurization and denitrification system, and flue gas after cooling is transported to the inlet of desulfurization and denitrification system by the flue gas exchanger main body;The into smoke pipe and the out of smoke pipe are all ceramic composite pipe using high-temperature-resistant and abrasion-resistant pipeline material, the inner wall is treated and is equipped with anti-accumulation structure, reduces the attachment of smoke dust and is blocked, and the smooth conveying of flue gas is guaranteed;The temperature sensor is arranged at the key position of the out of smoke pipe, is used for monitoring the temperature of flue gas in real time, and the temperature data of flue gas is fed back to control system in real time, and the temperature sensor selects high-temperature sensor thermocouple with fast response speed and accurate temperature measurement;The control system is associated with temperature sensor, heat exchange component, automatically controls heat exchange process according to the monitored temperature of flue gas, so that the temperature of flue gas after cooling is stabilized in the interval adapted to desulfurization and denitrification reaction;The control system is built based on PLC platform, and the preset desulfurization and denitrification adapted temperature interval is 370 DEG C ± 5 DEG C;After receiving the signal of temperature sensor, the flow and flow rate of cooling medium of heat exchange component are automatically adjusted, or the heat exchange power gear is switched, to ensure that the temperature of flue gas after cooling is stabilized in the target interval;Meanwhile, the control system has over-temperature, medium leakage fault alarm, data recording and remote monitoring functions, to facilitate operation and maintenance management.

[0006] As a further scheme of the application: the outside of the flue gas exchanger main body is provided with a heat preservation layer;Several flue gas exchanger main bodies are sequentially arranged from top to bottom in the inside of the equipment shell;The adjacent flue gas exchanger main bodies are communicated with each other;The material of the flue gas exchanger main body is selected from high-temperature-resistant and corrosion-resistant alloy materials, which is suitable for the high-temperature flue gas environment of the kiln.

[0007] As a further scheme of the application: the heat exchange component includes medium pipe fittings uniformly arranged in the inside of the flue gas exchanger main body and heat exchange structures arranged on the outer wall of the medium pipe fittings;The upper end of the equipment shell is provided with refrigeration structures communicated with the plurality of medium pipe fittings, and the refrigeration structures are respectively communicated with the medium pipe fittings through pipes.

[0008] As a further scheme of the present application: the medium pipe comprises a gas cooling pipe and a liquid cooling pipe, the cooling medium of the gas cooling pipe is set as cooling gas, and the cooling medium of the liquid cooling pipe is set as cooling liquid; the heat exchange structure adopts a plurality of fin rings arranged on the gas cooling pipe and the liquid cooling pipe respectively; and the refrigeration structure comprises a gas refrigeration device and a liquid refrigeration device.

[0009] As a further scheme of the present application: the control system comprises a data storage and analysis module and a processing module; the data storage and analysis module is used for recording historical flue gas temperature data, regulation parameters and auxiliary optimization operation strategies; and the processing module communicates with the central control platform of the kiln and the desulfurization and denitrification system to realize collaborative control.

[0010] As a further scheme of the present application: the inside of the equipment shell is provided with a treatment assembly for removing particulate impurities in the flue gas; the treatment assembly is arranged below the lowermost flue gas exchanger body, and the flue gas after removing the particulate impurities is introduced into the flue gas exchanger body for heat exchange, thereby solving the problem of blockage of the flue gas exchanger body by the particulate impurities in the flue gas.

[0011] As a further scheme of the present application: the treatment assembly comprises a lifting seat, a first treatment plate, a second treatment plate and a lifting structure; the lifting seat is fixed to the inner wall of the equipment shell, and a lifting plate is movably arranged on the outside of the lifting seat; the second treatment plate is arranged below the first treatment plate, the first treatment plate and the second treatment plate are both fixedly arranged on the lifting plate, and the distance between the first treatment plate and the second treatment plate is greater than the height dimension of the smoke inlet pipe; the first treatment plate and the second treatment plate are both made of high-temperature-resistant material; the lifting structure is symmetrically arranged inside the lifting seat and controls the lifting plate to move up and down, thereby adjusting the positions of the first treatment plate and the second treatment plate; the initial state of the second treatment plate is arranged on the upper side of the smoke inlet pipe, and the flue gas entering from the smoke inlet pipe is treated; after the treatment, the flue gas enters the flue gas exchanger body through the first treatment plate; when the particulate impurities adhered to the second treatment plate reach a set time, the lifting structure controls the lifting plate to move downward, so that the second treatment plate moves to the lower side of the smoke inlet pipe, the first treatment plate moves to the upper side of the smoke inlet pipe, and the first treatment plate treats the flue gas entering from the smoke inlet pipe.

[0012] As a further scheme of the present application: the lifting structure comprises a lifting rack and a lifting gear; the lifting rack is arranged inside the lifting seat along the moving direction of the lifting plate; the lifting gear is fixed with the lifting plate through a connecting seat; the lifting gear is engaged with the lifting rack; one side of the lifting seat is provided with a driving motor for controlling the rotation of the lifting gear; the lifting seat is provided with a reinforcing block connected with the lifting plate; and the equipment shell is provided with a single-chip microcomputer for controlling the synchronous driving of the driving motors.

[0013] As a further scheme of the present application: the processing assembly further comprises cleaning scraping strips and bevel gear structures; the cleaning scraping strips are provided in a plurality of numbers, and are respectively arranged at the lower end face of the first processing plate member and the upper and lower end faces of the second processing plate member, and can clean the lower end face of the first processing plate member and the upper and lower end faces of the second processing plate member, and clean the impurities adhered to the first processing plate member and the second processing plate member; the inner lower end of the equipment shell is provided with a collection groove for collecting the impurities, and the inner wall of the equipment shell is symmetrically provided with a discharge box used in cooperation with the second processing plate member; when the second processing plate member moves to the lower side of the smoke inlet pipe and the first processing plate member moves to the upper side of the smoke inlet pipe, the cleaning scraping strips guide the impurities at the upper end of the second processing plate member into the collection groove through the discharge box, and directly clean the impurities at the lower end of the second processing plate member into the collection groove; one end of the bevel gear structure is coaxially connected with the lifting gear, one end of the lead screw transmission device is provided with a connecting rod coaxially connected with the bevel gear structure, the bevel gear structure is drivingly connected with the lifting gear and controls the reciprocating movement of the cleaning scraping strips through the lead screw transmission device, and the driving motor drives the lifting gear to rotate, so that the lifting gear cooperates with the lifting rack to control the movement of the lifting plate, and simultaneously controls the lead screw transmission device to work through the bevel gear structure, and the lead screw transmission device cleans the lower end face of the first processing plate member and the upper and lower end faces of the second processing plate member.

[0014] As a further scheme of the present application: the processing assembly further comprises driving racks and telescopic sealing blocks; the lead screw transmission device is provided with a moving block connected with the first processing plate member, and the moving block is symmetrically arranged on the lead screw transmission device connected with the second processing plate member; the first processing plate member and the second processing plate member are each provided with a moving groove for the movement of the moving block, both end faces of the moving block are provided with a reinforcing member connected with the driving rack, and the driving rack is movably arranged in the moving groove; the telescopic sealing blocks are provided in a plurality of numbers, and are movably arranged in the moving groove and can seal the moving groove to reduce the entry of impurities into the moving groove; the reinforcing member is arranged at the upper side of the telescopic sealing block, the upper end of the telescopic sealing block is provided with a guide rack, and the interiors of the first processing plate member and the second processing plate member are each provided with a plurality of transmission gears arranged in alignment with the telescopic sealing block; the telescopic sealing block is drivingly connected with the driving rack through the transmission gears.

[0015] As a further scheme of the present application: the telescopic sealing block comprises a first sealing block for mounting a guide rack and a second sealing block symmetrically movably arranged on the first sealing block, a sealing groove for movement of the second sealing block is arranged on the first sealing block in a matched mode, a plurality of guide rods movably inserted with the second sealing block are symmetrically arranged in the sealing groove, a reset spring connected with the sealing groove and the second sealing block respectively is sleeved on the guide rod, the lead screw transmission device can control the second sealing block through the moving block, and the driving rack drives the transmission gear to rotate through the reinforcing member, so that the transmission gear drives the telescopic sealing block to move through the guide rack, and the moving groove is opened or closed.

[0016] As a further scheme of the present application: the transmission gear comprises a first gear meshed with the driving rack and a second gear coaxially connected with the first gear, the second gear is meshed with the guide rack, the second gear is arranged on the lower side of the first gear, and a plurality of first gears are rotatably arranged in the interiors of the first processing plate and the second processing plate.

[0017] Compared with the prior art, the present application has the following beneficial effects: (1) The flue gas exchanger body, the smoke inlet pipe, the smoke outlet pipe, the temperature sensor and the control system are arranged, the temperature sensor cooperates with automatic control to stably cool the flue gas to a temperature suitable for the desulfurization and denitrification reaction, the desulfurization and denitrification efficiency is improved, the pollutant meets the emission standard, the medium pipe, the heat exchange structure and the refrigeration structure cooperate to quickly and accurately cool the flue gas, the flue gas cooling task can be independently borne during the boiler maintenance period, or the flue gas cooling task is cooperated with the boiler to avoid interruption of flue gas treatment due to shutdown of the boiler, the production continuity and environmental protection compliance are maintained, the automatic control reduces manual intervention, the fault early warning and data recording function facilitate timely discovery and treatment of equipment problems, the equipment life is prolonged, the operation and maintenance cost is reduced, the control strategy and heat exchange parameters can be flexibly adjusted according to different kiln flue gas parameters and desulfurization and denitrification process requirements, the flue gas cooling equipment is suitable for various float glass kiln flue gas treatment scenes, and the use effect of the flue gas cooling equipment is improved.

[0018] (2) The processing assembly, the lifting seat, the lifting plate, the first processing plate, the second processing plate and the lifting structure are matched and used, the flue gas entering the flue gas exchanger body can remove the particle impurities, the use effect of the flue gas exchanger body is ensured, and the maintenance frequency of the flue gas exchanger body is reduced, the lifting structure, the connecting rod, the cleaning scraping strip, the bevel gear structure and the lead screw transmission device are matched and used, the particle impurities on the first processing plate and the second processing plate are cleaned, the first processing plate and the second processing plate can continuously work, the use effect of the processing assembly is improved, the lead screw transmission device drives the rack, the moving block, the telescopic sealing block, the guide rack, the transmission gear and the discharge box, the moving groove can be sealed and protected, the impurities entering the inside of the first processing plate and the second processing plate are reduced, the service life of the processing assembly is prolonged, the discharged impurities can be discharged, and the use effect of the cooling equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structural diagram of the application.

[0020] Figure 2 It is the local structure diagram of the flue gas exchanger body and the equipment shell in the application.

[0021] Figure 3 It is the schematic diagram of the temperature sensor and the control system in the application.

[0022] Figure 4 It is the local structure diagram of the processing assembly in the application Figure 1 It is the enlarged view of the structure at A in the application.

[0023] Figure 5 It is the local structure diagram of the processing assembly in the application

[0024] Figure 6 It is the local structure diagram of the first processing plate and the cleaning scraping strip in the application.

[0025] Figure 7 It is the local structure diagram of the processing assembly in the application Figure 6 It is the enlarged view of the structure at B in the application.

[0026] Figure 8 It is the local structure diagram of the lifting structure and the lead screw transmission device in the application.

[0027] Figure 9 It is the enlarged view of the structure at C in the application. Figure 8

[0028] Figure 10 It is the local structure diagram of the moving block and the telescopic sealing block in the application.

[0029] Figure 11 It is the local structure diagram of the telescopic sealing block in the application.​

[0030] Figure: 1, flue gas exchanger main body; 2, equipment shell; 3, smoke inlet pipe; 4, smoke outlet pipe; 5, temperature sensor; 6, control system; 7, medium pipe; 8, heat exchange structure; 9, refrigeration structure; 10, gas cooling pipe; 11, liquid cooling pipe; 12, data storage and analysis module; 13, processing module; 14, lifting seat; 15, lifting plate; 16, first processing plate; 17, second processing plate; 18, lifting structure; 19, lifting rack; 20, lifting gear; 21, connecting seat; 22, cleaning scraper; 23, bevel gear structure; 24, lead screw transmission device; 25, drive rack; 26, moving block; 27, telescopic sealing block; 28, guide rack; 29, transmission gear; 30, support frame; 31, drive motor; 32, connecting rod; 33, reinforcing member; 34, first sealing block; 35, second sealing block; 36, guide rod; 37, return spring; 38, first gear; 39, second gear; 40, discharge box; 41, collection groove. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment one Please refer to Figure 1 - Figure 3The application provides a kiln flue gas cooling equipment for desulfurization and denitrification, which comprises a flue gas exchanger main body 1, a flue gas inlet pipe 3, a flue gas outlet pipe 4, a temperature sensor 5 and a control system 6, a plurality of flue gas exchanger main bodies 1 are sequentially installed in the inside of an equipment shell 2 from top to bottom, the inside of the flue gas exchanger main body 1 is provided with a heat exchange assembly for heat exchange, the outside of the equipment shell 2 is provided with a support frame 30, and the support frame 30 is provided with a staircase; one end of the flue gas inlet pipe 3 is arranged at the lower part of the outside of the equipment shell 2 and communicates with the flue gas exchanger main body 1, the other end of the flue gas inlet pipe 3 is connected with a kiln flue gas outlet and guides the kiln flue gas into the equipment shell 2 and then into the flue gas exchanger main body 1; one end of the flue gas outlet pipe 4 is arranged at the upper part of the outside of the equipment shell 2 and communicates with the flue gas exchanger main body 1, the other end of the flue gas outlet pipe 4 communicates with a desulfurization and denitrification system inlet, and the flue gas exchanger main body 1 conveys the flue gas after cooling to the desulfurization and denitrification system inlet; the flue gas inlet pipe 3 and the flue gas outlet pipe 4 are both made of ceramic composite pipes of high-temperature-resistant and corrosion-resistant pipe materials, the inner walls are treated to be smooth and are provided with an anti-dust deposition structure, so that the adhesion and blockage of smoke dust are reduced and the smooth conveying of flue gas is ensured; the temperature sensor 5 is arranged at a key position of the flue gas outlet pipe 4, is used for monitoring the flue gas temperature in real time, and feeds back the flue gas temperature data to the control system 6 in real time; the temperature sensor 5 selects a high-temperature sensor thermocouple with fast response speed and accurate temperature measurement; the control system 6 is associated with the temperature sensor 5 and the heat exchange assembly, automatically controls the heat exchange process according to the monitored flue gas temperature, makes the flue gas temperature after cooling stable in an interval suitable for the desulfurization and denitrification reaction, is built based on a PLC platform, and a preset desulfurization and denitrification suitable temperature interval is 370 DEG C plus or minus 5 DEG C; after receiving the signal of the temperature sensor 5, the cooling medium flow and flow rate of the heat exchange assembly are automatically adjusted, or the heat exchange power gear is switched, so that the flue gas temperature after cooling is ensured to be stable in the target interval; meanwhile, the control system 6 has the functions of over-temperature, medium leakage fault alarm reminding, data recording and remote monitoring, facilitates operation and maintenance management, and a control cabinet of the control system 6 is installed nearby and is connected with the control modules of the temperature sensor 5 and the heat exchange assembly through a cable.

[0033] In the embodiment, the flue gas inlet pipe 3 guides the kiln flue gas into the equipment shell 2, so that the kiln flue gas sequentially passes through the plurality of flue gas exchanger main bodies 1 upwards, so that the flue gas exchanger main bodies 1 cool the flue gas through the heat exchange assembly, and the flue gas after cooling is guided into the desulfurization and denitrification system inlet through the flue gas outlet pipe 4 and then into the desulfurization and denitrification system, the temperature sensor 5 monitors the flue gas temperature in real time and feeds back the flue gas temperature data to the control system 6 in real time, the control system 6 automatically controls the heat exchange process according to the monitored flue gas temperature, makes the flue gas temperature after cooling stable in an interval suitable for the desulfurization and denitrification reaction, and ensures the desulfurization and denitrification efficiency of the desulfurization and denitrification system.

[0034] In the embodiment, the kiln high-temperature flue gas of about 750 DEG C enters the flue gas exchanger main body 1 through the flue gas inlet pipe 3, exchanges heat with the cooling medium in the heat exchange assembly, and the temperature gradually decreases, the temperature sensor 5 monitors the flue gas temperature of the flue gas outlet pipe in real time, when the temperature is higher than 375 DEG C, the control system 6 automatically increases the flow of the cooling medium, and the heat exchange is strengthened, when the temperature is lower than 365 DEG C, the flow of the cooling medium is reduced, and the energy-saving operation is maintained.

[0035] During the boiler maintenance, the boiler flue gas passage is closed, the device operates independently, the desulfurization and denitrification system stably receives about 370 DEG C flue gas, and when the boiler operates normally, the device can be used as an auxiliary cooling device, cooperates with the flue gas temperature control, and relieves the operation pressure of the boiler.

[0036] In the embodiment, the flue gas exchanger main body 1 is externally provided with a heat preservation layer, a plurality of flue gas exchanger main bodies 1 are sequentially arranged from top to bottom in the interior of the equipment shell 2, adjacent flue gas exchanger main bodies 1 are communicated with each other, and the flue gas exchanger main body 1 is made of high-temperature-resistant and corrosion-resistant alloy material, and is suitable for the high-temperature flue gas environment of the kiln.

[0037] In the embodiment, the heat exchange assembly comprises the medium pipe 7 uniformly arranged in the flue gas exchanger main body 1 and the heat exchange structure 8 arranged on the outer wall of the medium pipe 7, and the upper end of the equipment shell 2 is provided with the refrigeration structure 9 communicated with the plurality of medium pipes 7, and the refrigeration structure 9 is respectively communicated with the medium pipes 7 through the pipes.

[0038] In the embodiment, the refrigeration structure 9 introduces the cooling medium into the medium pipe 7, so that the medium pipe 7 is used in cooperation with the heat exchange structure 8, and the flue gas can be cooled.

[0039] In the embodiment, the medium pipe 7 comprises the gas cooling pipe 10 and the liquid cooling pipe 11, the cooling medium of the gas cooling pipe 10 is arranged as cooling gas, the cooling medium of the liquid cooling pipe 11 is arranged as cooling liquid, the cooling gas and the cooling liquid flow reversely with the flue gas, rapidly replace heat, and reduce the flue gas temperature, the heat exchange structure 8 adopts a plurality of fin rings respectively arranged on the gas cooling pipe 10 and the liquid cooling pipe 11, and the refrigeration structure 9 comprises a gas refrigeration device and a liquid refrigeration device.

[0040] In the embodiment, the refrigeration structure 9 generates the cooling gas and the cooling liquid respectively, so that the cooling gas cools the flue gas through the gas cooling pipe 10, and the cooling liquid cools the flue gas through the liquid cooling pipe 11. Initially, the main body 1 of the flue gas exchanger causes the refrigeration structure 9 to primarily generate cooling liquid, which rapidly cools the flue gas through liquid cooling. Liquid cooling has a large specific heat capacity and high heat transfer efficiency, which can quickly absorb a large amount of heat from the high-temperature flue gas in the kiln, solving the need for rapid cooling in the high-temperature section. After the high-temperature flue gas is rapidly cooled, the main body 1 of the flue gas exchanger causes the refrigeration structure 9 to primarily generate cooling gas, which precisely cools the flue gas through air cooling. The air cooling temperature is flexible, and when the flue gas approaches the target temperature, the cooling range can be precisely controlled by adjusting the air flow rate, ensuring the stability of the desulfurization and denitrification adaptation temperature. The combination of the two can achieve a stepped cooling of rapid liquid cooling in the high-temperature section and precise air cooling in the low-temperature section. The heat exchange efficiency is improved compared to a single cooling method, and the temperature control accuracy is improved, while reducing the load on the liquid cooling system and reducing the loss of liquid cooling medium.

[0041] In this invention, the control system 6 includes a data storage and analysis module 12 and a processing module 13. The data storage and analysis module 12 is used to record historical flue gas temperature data, control parameters, and auxiliary optimization operation strategies. The processing module 13 communicates with the central control platform of the kiln and desulfurization and denitrification system to achieve collaborative control. The data storage and analysis module 12 automatically synchronizes the optimized operation strategies, such as adjusted temperature control thresholds and collaborative parameters, to the processing module 13 every day. After the processing module 13 executes the optimization, it feeds back the real-time operation data to the data storage and analysis module 12 to verify the optimization effect, forming a closed loop of optimization-execution-feedback.

[0042] In this embodiment, this equipment was applied in the float glass kiln flue gas treatment and renovation project. During boiler maintenance, the flue gas temperature at the outlet pipe was stably controlled between 365-375℃. In terms of pollutant removal efficiency, nitrogen oxide emissions were reduced to 16.135 mg / m³. 3 Particulate matter emissions decreased to 1.677 mg / m³. 3 Sulfur dioxide emissions were reduced to 0.816 mg / m³. 3 All were far below the environmental protection requirement of 200 mg / m³ for nitrogen oxides. 3 Particulate matter 20mg / m³ 3 Sulfur dioxide 100mg / m³ 3 The emission standards ensured environmental compliance and continuous production, verifying the practicality and reliability of the equipment.

[0043] Example 2 Based on Example 1, referring to Figure 1 and Figure 4 - Figure 8For the second embodiment of the present application, the interior of the device housing 2 is provided with a treatment assembly for removing particulate impurities in the flue gas; the treatment assembly is arranged below the lowermost flue gas exchanger body 1, and the flue gas after removal of particulate impurities is introduced into the flue gas exchanger body 1 for heat exchange, thereby solving the problem of blockage of the flue gas exchanger body 1 by particulate impurities in the flue gas.

[0044] The treatment assembly comprises a lifting seat 14, a first treatment plate 16, a second treatment plate 17, and a lifting structure 18; the first treatment plate 16 and the second treatment plate 17 are each provided with filter holes for filtering particulate impurities; the lifting seat 14 is fixed to the inner wall of the device housing 2, and the outer side thereof is movably provided with a lifting plate 15; the second treatment plate 17 is arranged below the first treatment plate 16, and the first treatment plate 16 and the second treatment plate 17 are both fixedly arranged on the lifting plate 15, and the distance between the first treatment plate 16 and the second treatment plate 17 is greater than the height dimension of the flue gas inlet pipe 3; the first treatment plate 16 and the second treatment plate 17 are both made of high-temperature-resistant material; the lifting structure 18 is symmetrically arranged inside the lifting seat 14 and controls the lifting plate 15 to move up and down, thereby adjusting the positions of the first treatment plate 16 and the second treatment plate 17; the initial state of the second treatment plate 17 is arranged on the upper side of the flue gas inlet pipe 3, and the flue gas entering from the flue gas inlet pipe 3 is treated; the treated flue gas enters the flue gas exchanger body 1 through the first treatment plate 16; when the particulate impurities adhered to the second treatment plate 17 reach a set time, the lifting structure 18 controls the lifting plate 15 to move downward, so that the second treatment plate 17 moves to the lower side of the flue gas inlet pipe 3, and the first treatment plate 16 moves to the upper side of the flue gas inlet pipe 3, and the first treatment plate 16 treats the flue gas entering from the flue gas inlet pipe 3.

[0045] In this embodiment, the device housing 2 introduces the kiln flue gas to the second treatment plate 17 through the flue gas inlet pipe 3, so that the second treatment plate 17 filters the particulate impurities in the kiln flue gas; every certain period of time, the lifting structure 18 is started to drive the lifting plate 15 to move on the lifting seat 14, so that the second treatment plate 17 moves from the upper side of the flue gas inlet pipe 3 to the lower side of the flue gas inlet pipe 3, and the first treatment plate 16 moves to the upper side of the flue gas inlet pipe 3, so that the first treatment plate 16 treats the flue gas.

[0046] The lifting structure 18 comprises a lifting rack 19 and a lifting gear 20; the lifting rack 19 is arranged inside the lifting seat 14 along the moving direction of the lifting plate 15; the lifting gear 20 is fixed to the lifting plate 15 through a connecting seat 21; the lifting gear 20 is engaged with the lifting rack 19; one side of the lifting seat 14 is provided with a driving motor 31 for controlling the rotation of the lifting gear 20; the lifting seat 14 is provided with a reinforcing block connected with the lifting plate 15; the device housing 2 is provided with a single-chip microcomputer for controlling the synchronous driving of the driving motors 31.

[0047] In this embodiment, the driving motor 31 is started to drive the lifting gear 20 to rotate, so that the lifting gear 20 is in meshing transmission with the lifting rack 19, the lifting gear 20 controls the connecting seat 21 to move on the lifting seat 14, the connecting seat 21 drives the lifting plate 15 to move on the lifting seat 14 through the reinforcing block, and the lifting plate 15 drives the first processing plate 16 and the second processing plate 17 to move.

[0048] Embodiment three On the basis of embodiment two, referring to Figure 7 Figure 11 , the processing assembly further comprises cleaning scraping strips 22 and bevel gear structures 23; the cleaning scraping strips 22 are arranged in a plurality of numbers, and the plurality of cleaning scraping strips 22 are symmetrically arranged at the lower end face of the first processing plate 16 and the upper and lower end faces of the second processing plate 17, and can clean the lower end face of the first processing plate 16 and the upper and lower end faces of the second processing plate 17 to remove the impurities adhered to the first processing plate 16 and the second processing plate 17; the inner lower end of the equipment shell 2 is provided with a collection groove 41 for collecting the impurities; the inner wall of the equipment shell 2 is symmetrically provided with a discharge box 40 used in cooperation with the second processing plate 17; the inner wall of the equipment shell 2 is provided with a mounting groove for mounting the discharge box 40; when the cleaning scraping strips 22 scrape the impurities to the discharge box 40, the impurities are guided into the collection groove 41 through the discharge box 40; when the second processing plate 17 moves to the lower side of the smoke inlet pipe 3, and the first processing plate 16 moves to the upper side of the smoke inlet pipe 3, the cleaning scraping strips 22 guide the impurities at the upper end of the second processing plate 17 into the collection groove 41 through the discharge box 40, and directly remove the impurities at the lower end of the second processing plate 17 into the collection groove 41; The bevel gear structure 23 is coaxially connected with the lifting gear 20 at one end, the lead screw transmission device 24 is provided with a connecting rod 32 coaxially connected with the bevel gear structure 23 at one end, the bevel gear structure 23 is in transmission connection with the lifting gear 20 and controls the cleaning scraping strips 22 to move back and forth through the lead screw transmission device 24, the lead screw transmission device 24 comprises a lead screw and a lead screw block symmetrically arranged on the lead screw, the lead screw is coaxially connected with the two bevel gear structures 23, the lead screw is provided with reciprocating lead screw threads symmetrically, so that the lead screw transmission device 24 synchronously controls the two cleaning scraping strips 22 to move towards each other, when the two cleaning scraping strips 22 are in close contact, the cleaning scraping strips 22 move back, the driving motor 31 drives the lifting gear 20 to rotate, so that the lifting gear 20 controls the lifting plate 15 to move in cooperation with the lifting rack 19, and the lifting gear 20 controls the lead screw transmission device 24 to work through the bevel gear structure 23, the lead screw transmission device 24 drives the cleaning scraping strips 22 to clean the lower end face of the first processing plate 16 and the upper and lower end faces of the second processing plate 17.​

[0049] In the embodiment, when the second processing plate 17 moves from the upper side of the smoke inlet pipe 3 to the lower side of the smoke inlet pipe 3, the driving motor 31 is started, the lifting gear 20 is controlled to rotate, the lead screw transmission device 24 is driven to rotate by the lifting gear 20, the lead screw transmission device 24 is driven to work by the connecting rod 32, the lead screw transmission device 24 drives the control cleaning scraper 22 to reciprocate, the cleaning scraper 22 cleans the lower end face of the first processing plate 16 and the upper and lower end faces of the second processing plate 17, the impurities at the lower end of the first processing plate 16 are cleaned to the second processing plate 17, and the impurities at the upper end of the second processing plate 17 are guided into the collecting groove 41 through the discharge box 40, and the impurities at the lower end of the second processing plate 17 are cleaned into the collecting groove 41.

[0050] In the embodiment, the processing assembly further comprises a driving rack 25 and a telescopic sealing block 27; the lead screw transmission device 24 is provided with a moving block 26 connected with the first processing plate 16, the moving block 26 is symmetrically arranged on the lead screw transmission device 24 connected with the second processing plate 17; the first processing plate 16 and the second processing plate 17 are both provided with a moving groove for the movement of the moving block 26, both end faces of the moving block 26 are provided with a reinforcing piece 33 connected with the driving rack 25, and the driving rack 25 is movably arranged in the moving groove; the telescopic sealing block 27 is arranged in a plurality of forms, the plurality of telescopic sealing blocks 27 are movably arranged in the moving groove and can seal the moving groove to reduce the entry of impurities into the moving groove, the reinforcing piece 33 is arranged on the upper side of the telescopic sealing block 27, the telescopic sealing block 27 is provided with a guide rack 28 at the upper end, and the interiors of the first processing plate 16 and the second processing plate 17 are both provided with a plurality of transmission gears 29 arranged in alignment with the telescopic sealing block 27, and the telescopic sealing block 27 is in transmission connection with the driving rack 25 through the transmission gears 29.

[0051] In the embodiment, when the lead screw transmission device 24 works, the moving block 26 is driven to move, the reinforcing piece 33 is driven to move by the moving block 26, the driving rack 25 is driven to move in the moving groove by the reinforcing piece 33, the transmission gear 29 is driven to work by the driving rack 25, the guide rack 28 is driven to move by the transmission gear 29, the telescopic sealing block 27 is driven to move by the guide rack 28, and the moving groove is moved, when the driving rack 25 drives the transmission gear 29 to work, the moving block 26 is extruded to the telescopic sealing block 27.

[0052] The telescopic sealing block 27 comprises a first sealing block 34 for mounting the guide rack 28 and a second sealing block 35 symmetrically movably arranged on the first sealing block 34, the first sealing block 34 is attached with a sealing groove for movement of the second sealing block 35, a plurality of guide rods 36 symmetrically arranged in the sealing groove movably connect with the second sealing block 35, the guide rods 36 are sleeved with reset springs 37 connected with the sealing groove and the second sealing block 35 respectively, the screw transmission device 24 can control the second sealing block 35 to move through the moving block 26, and the driving rack 25 drives the transmission gear 29 to rotate through the reinforcing member 33, so that the transmission gear 29 drives the telescopic sealing block 27 to move through the guide rack 28, and the moving groove is opened or closed.

[0053] In the embodiment, when the moving block 26 extrudes the telescopic sealing block 27, the moving block 26 is attached with the second sealing block 35, the second sealing block 35 moves on the first sealing block 34, the second sealing block 35 extrudes the reset spring 37, when the moving block 26 controls the telescopic sealing block 27 to move out of the moving groove through the driving rack 25, the transmission gear 29 and the guide rack 28, the extrusion force of the moving block 26 on the second sealing block 35 does not reach the set limit value, and 10%-20% safety margin is reserved, so as to avoid the situation that the value is close to or exceeds the limit value and causes jamming, that is, the first sealing block 34 can drive the second sealing block 35 to move.

[0054] In the embodiment, the transmission gear 29 comprises a first gear 38 meshing with the driving rack 25 and a second gear 39 coaxially connected with the first gear 38, the second gear 39 meshes with the guide rack 28, the diameter size of the second gear 39 is greater than that of the first gear 38, so that the moving stroke of the guide rack 28 is greater than that of the driving rack 25, the second gear 39 is arranged on the lower side of the first gear 38, the second gear 39 is provided with a connecting shaft rod coaxial with the first gear 38, and a plurality of first gears 38 are rotatably arranged in the interiors of the first processing plate member 16 and the second processing plate member 17.

[0055] In the embodiment, when the moving block 26 drives the driving rack 25 to move, the driving rack 25 drives the first gear 38 to rotate, the first gear 38 drives the second gear 39 to rotate, the second gear 39 drives the guide rack 28 to move, and the guide rack 28 drives the first sealing block 34 to move.

[0056] The above embodiments are only used to illustrate the technical method of the present application but not limit the present application, although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A desulfurization and denitrification front kiln flue gas cooling equipment, characterized in that, The utility model relates to a kind of flue gas exchanger, comprising: Flue gas exchanger body (1) is fixedly installed by equipment shell (2), inside is equipped with heat exchange component for heat exchange; Smoke inlet pipe (3) is arranged at the lower part outside equipment shell (2), and the kiln flue gas is introduced into flue gas exchanger body (1); Smoke outlet pipe (4) is arranged at the upper part outside equipment shell (2), and the flue gas after cooling is transported to the entrance of desulfurization and denitrification system by flue gas exchanger body (1); Temperature sensor (5) is arranged at smoke outlet pipe (4), for real-time monitoring of flue gas temperature; Control system (6) is associated with temperature sensor (5) and heat exchange component, and automatically controls heat exchange process according to monitored flue gas temperature, so that flue gas temperature after cooling is stabilized in the interval suitable for desulfurization and denitrification reaction.

2. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 1, characterized in that, The outer part of the flue gas exchanger body (1) is provided with a heat preservation layer. A plurality of flue gas exchanger bodies (1) are arranged in the interior of the equipment shell (2) from top to bottom. The adjacent flue gas exchanger bodies (1) are in communication with each other.

3. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 1, characterized in that, The heat exchange component includes medium pipe fittings (7) uniformly arranged in the interior of the flue gas exchanger body (1) and heat exchange structures (8) arranged on the outer wall of the medium pipe fittings (7). The upper end of the equipment shell (2) is provided with refrigeration structures (9) in communication with a plurality of medium pipe fittings (7).

4. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 3, characterized in that, The medium pipe fittings (7) include gas cooling pipes (10) and liquid cooling pipes (11). The heat exchange structures (8) adopt a plurality of fin rings arranged on the gas cooling pipes (10) and the liquid cooling pipes (11) respectively.

5. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 1, characterized in that, The control system (6) includes: A data storage and analysis module (12) for recording historical flue gas temperature data, control parameters and auxiliary optimization operation strategies; A processing module (13) in communication with the central control platform of the kiln and the desulfurization and denitrification system to realize collaborative control.

6. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 1, characterized in that, The interior of the equipment shell (2) is provided with a treatment component for removing particulate impurities in flue gas. The treatment component is arranged below the lowermost flue gas exchanger body (1).

7. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 6, characterized in that, The treatment component includes: A lifting seat (14) fixed to the inner wall of the equipment shell (2), with a lifting plate (15) movably arranged on the outer side thereof; A first treatment plate (16) and a second treatment plate (17) arranged below the first treatment plate (16) are both fixedly arranged on the lifting plate (15), and the distance between the first treatment plate (16) and the second treatment plate (17) is greater than the height dimension of the smoke inlet pipe (3); A lifting structure (18) is symmetrically arranged in the interior of the lifting seat (14) and controls the lifting plate (15) to move up and down; The initial state of the second treatment plate (17) is arranged on the upper side of the smoke inlet pipe (3), and the flue gas entering from the smoke inlet pipe (3) is treated, and the treated flue gas enters the flue gas exchanger body (1) through the first treatment plate (16). When the second processing plate member (17) adheres to the particle impurities for a set time, the lifting structure (18) moves the lifting plate (15) downward, so that the second processing plate member (17) moves to the lower side of the smoke inlet pipe (3), and the first processing plate member (16) moves to the upper side of the smoke inlet pipe (3), and the first processing plate member (16) processes the flue gas entering from the smoke inlet pipe (3).

8. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 7, characterized in that, The lifting structure (18) comprises: A lifting rack (19) is arranged inside the lifting seat (14) in the moving direction of the lifting plate (15); A lifting gear (20) is fixed with the lifting plate (15) through a connecting seat (21), and the lifting gear (20) is engaged with the lifting rack (19).

9. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 8, characterized in that, The processing assembly further comprises: A cleaning scraper (22) is arranged to clean the lower end surface of the first processing plate member (16) and the upper and lower end surfaces of the second processing plate member (17); A bevel gear structure (23) is drivingly connected with the lifting gear (20) and controls the reciprocating movement of the cleaning scraper (22) through a lead screw transmission device (24).

10. A device for cooling the flue gas of a kiln before desulphurization and denitrification according to claim 9, characterized in that, The processing assembly further comprises: A driving rack (25) connects the lead screw transmission device (24) with the cleaning scraper (22) through a moving block (26), and the first processing plate member (16) and the second processing plate member (17) are internally provided with a moving groove for the movement of the moving block (26); A telescopic sealing block (27) is movably arranged in the moving groove, an upper end of the telescopic sealing block (27) is provided with a guide rack (28), and the guide rack (28) is drivingly connected with the driving rack (25) through a transmission gear (29).

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