CN218821713U - Cooling unit, cooling device and flue gas treatment system - Google Patents
Cooling unit, cooling device and flue gas treatment system Download PDFInfo
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- CN218821713U CN218821713U CN202223167473.XU CN202223167473U CN218821713U CN 218821713 U CN218821713 U CN 218821713U CN 202223167473 U CN202223167473 U CN 202223167473U CN 218821713 U CN218821713 U CN 218821713U
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- 238000001816 cooling Methods 0.000 title claims abstract description 211
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 239000003546 flue gas Substances 0.000 title claims abstract description 129
- 239000000428 dust Substances 0.000 claims abstract description 52
- 239000002826 coolant Substances 0.000 claims abstract description 39
- 238000007599 discharging Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000779 smoke Substances 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 12
- 230000023556 desulfurization Effects 0.000 claims description 12
- 206010022000 influenza Diseases 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000002918 waste heat Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000011229 interlayer Substances 0.000 description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 8
- 229910052721 tungsten Inorganic materials 0.000 description 8
- 239000010937 tungsten Substances 0.000 description 8
- 239000002912 waste gas Substances 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000003779 heat-resistant material Substances 0.000 description 6
- 239000007769 metal material Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 235000003599 food sweetener Nutrition 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 239000003765 sweetening agent Substances 0.000 description 5
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Chimneys And Flues (AREA)
Abstract
The utility model discloses a cooling unit, a cooling device and a flue gas treatment system, the cooling unit is characterized in that the cooling unit comprises a cylinder body, the cylinder body is provided with a through hole to form a flow passage for flue gas circulation, the cylinder body is provided with an inflow port and an outflow port at intervals, and a cooling channel communicated with the inflow port and the outflow port is arranged in the cylinder body; the cylinder is provided with two connecting pipes which are respectively communicated with the inflow port and the outflow port, one connecting pipe is used for introducing a cooling medium to exchange heat with the flue gas flowing through the flue gas flow passage, and the other connecting pipe is used for discharging the cooling medium after heat exchange. The cooling equipment formed by the cooling unit is used for treating the flue gas, so that the temperature of the flue gas can be reduced to the allowable working range of the dust removal equipment under the condition that the flue gas does not pass through a waste heat boiler, thereby being beneficial to reducing the production cost and improving the economic benefit.
Description
Technical Field
The utility model belongs to the technical field of high temperature industrial furnace, in particular to cooling unit, cooling arrangement and flue gas processing system.
Background
In the high-temperature industrial manufacturing industry, especially in the kiln furnace which melts the raw material by using the combustion or electric heating of natural gas, a large amount of high-temperature waste gas containing sulfide, nitrogen oxide and dust is generated, in order to meet the national concentration requirement of each pollutant in the waste gas which limits the emission, the waste gas is commonly subjected to desulfurization, denitrification and dust removal treatment before the emission of the waste gas in the industry at present, the schematic diagram of a flue gas treatment system is shown in fig. 1, the arrow in fig. 1 points to the flow direction of the flue gas, and the natural gas or other combustible fuels in the high-temperature kiln furnace generate high-temperature flue gas after combustion, and the temperature of the high-temperature flue gas is usually 300 to 1350 ℃. Under the action of the draught fan, the high-temperature flue gas generated by the high-temperature kiln reaches the bottom plane through the vertical flue, and the vertical flue is a flue gas channel vertical to the ground. The flue gas enters the horizontal flue after being treated by the desulfurization and denitrification equipment on the bottom plane. Then the flue gas enters a waste heat boiler and a dust remover thereof and is discharged to the atmosphere from a chimney.
However, since the small-sized high-temperature industrial kiln (the small-sized high-temperature kiln has no specific production tonnage standard, the small-sized standard is determined by taking the discharge amount of flue gas as an index, and the discharge amount of flue gas under the standard condition is lower than 25000 Nm/h, which is defined as a small-sized high-temperature industrial kiln), the amount of waste gas generated during production is small, the waste gas passes through a waste heat boiler, and the waste gas generates little steam, so that the waste gas is not enough for waste heat power generation and other functions, and the waste of the steam is caused by external discharge; if a waste heat boiler is not adopted for cooling the fuel gas, the current industrial dust collector adopts a bag type or an electric dust removal type, the operation allowable working temperature of the bag type dust collector is higher than 100 ℃ and lower than 200 ℃, and high-temperature flue gas directly enters the dust collector and then burns out a bag and the inner wall of the dust collector; meanwhile, the waste heat boiler occupies a large area, belongs to high-pressure special professional equipment and needs special operators to operate, so that the production labor cost is increased; although the cooling effect of the high-temperature flue gas in the flue can be enhanced by increasing the length of the flue, the construction cost and the land cost are increased, and the high-temperature flue gas further corrodes the flue when flowing through the flue, thereby increasing the construction cost.
Therefore, the cost waste on the production maintenance and the equipment to a certain extent can not be avoided in the flue gas treatment of the small-sized high-temperature industrial kiln, so that the production cost can be effectively controlled and the benefit can be improved if the temperature of the flue gas can be controlled to be reduced to the allowable working range of the dust remover without passing through a waste heat boiler in a flue.
Disclosure of Invention
The above-mentioned not enough to prior art exists, the utility model aims at providing a cooling unit, cooling device and flue gas processing system, the cooling device who adopts this cooling unit to constitute handles the flue gas, enables the flue gas temperature and reduces to the dust remover and allows working range under the condition of not passing through exhaust-heat boiler in the flue to be favorable to reduction in production cost, improve economic benefits.
The technical scheme of the utility model is realized like this:
a cooling unit comprises a cylinder body, wherein the cylinder body is provided with a through hole to form a flow channel for smoke circulation, an inflow port and an outflow port are arranged on the cylinder body at intervals, and a cooling channel communicated with the inflow port and the outflow port is arranged in the cylinder body.
The cylinder is provided with two connecting pipes which are respectively communicated with the inflow port and the outflow port, one connecting pipe is used for introducing a cooling medium to exchange heat with the flue gas flowing through the flue gas flow passage, and the other connecting pipe is used for discharging the cooling medium after heat exchange.
Therefore, the cooling medium enters the cooling channel from one connecting pipe and exchanges heat with the high-temperature flue gas passing through the flue gas flow channel, so that the temperature of the high-temperature flue gas is reduced, and meanwhile, the cooling medium after heat exchange is discharged from the other connecting pipe.
Further, the barrel comprises a double-layer barrel structure with an interlayer, wherein the double-layer barrel structure is formed by the inner shell and the outer shell, two ends of the interlayer are sealed to form the cooling channel, and the through hole is formed in the inner shell to form the flue gas flow channel.
Therefore, the through holes arranged on the inner shell form a flue gas flow passage, the interlayer cavity formed by the inner shell and the outer shell is a flow passage of the cooling medium, the cooling medium enters the interlayer cavity from one connecting pipe and exchanges heat with high-temperature flue gas passing through the flue gas flow passage, so that the temperature of the high-temperature flue gas is reduced, and meanwhile, the cooling medium after heat exchange is discharged out of the interlayer cavity from the other connecting pipe.
The arrangement of the inflow port and the outflow port includes, but is not limited to, the following two: 1. the inflow port and the outflow port are strip-shaped ports and are respectively arranged on two opposite sides of the outer shell, correspondingly, two connecting pipes are arranged on the outer shell, and the connecting ends of the two connecting pipes are communicated with the inflow port and the outflow port in a strip-shaped port mode, so that the connecting pipes can adopt square pipes; 2. the inflow port and the outflow port are circular ports and are respectively arranged on two opposite sides of the outer shell, correspondingly, the two connecting pipes are arranged on the outer shell, the connecting ends of the two connecting pipes are communicated with the inflow port and the outflow port in a circular port mode, and then the connecting pipes can be circular pipes. The inlet and outlet are respectively close to two ends of the cylinder in order to extend the circulation path of the cooling medium. The inflow port and the outflow port can be respectively arranged at two ends of the cylinder body and are determined according to actual requirements.
Further, the cylinder is made of a high temperature resistant metal material, including but not limited to tungsten, platinum, rhodium, carbon steel and tungsten steel, preferably 316L or 310S stainless steel.
The metal materials such as tungsten, platinum, rhodium, carbon steel, tungsten steel or stainless steel and the like are high-temperature resistant, wherein the 316L or 310S stainless steel meets the requirements in performance and is low in cost.
Further, the cross section of the cylinder body is in a shape of a circle, a triangle, a regular polygon or a non-regular polygon, preferably a regular polygon.
The triangle comprises an isosceles triangle, an equilateral triangle, an acute angle triangle, an obtuse angle triangle and the like; the regular polygon is a regular N-polygon with the number of sides N being more than or equal to 4, such as a square, a regular pentagon and a regular hexagon … …; the non-regular polygon is an N-sided polygon with the number of sides N being more than or equal to that of the N-sided polygon, such as a rhombus, a parallelogram, a non-regular pentagon and a non-regular hexagon … ….
When the cross section of the cylinder of the cooling unit is a regular polygon, there are at least two advantages: firstly, when the cooling units are assembled into the cooling equipment, the cooling units are convenient to stack; and secondly, heat-resistant materials are conveniently arranged on the cylinder body (the surface of the outer shell, the surface of the inner shell and the surfaces of two ends of the interlayer) in the following process, so that a heat-resistant layer is formed.
The heat-resistant material can determine whether the smoke is corrosive or not according to the smoke components, determine the used ramming mud components according to the difference of the smoke components, and select corundum and the like. The heat-resistant material can effectively prevent the cylinder body made of the metal material from being corroded by acidic or alkaline components in high-temperature flue gas.
The utility model also provides a cooling arrangement, cooling arrangement comprises one row or multirow cooling unit group, and every row of cooling unit group is by a plurality of preceding the cooling unit establish ties and constitute, two adjacent cooling units are connected through two connecting pipes that correspond, are located a connecting pipe of two cooling units of end and are connected with cold source and outer discharge tube respectively.
The connection between two adjacent cooling units can connect two connecting pipes in a welding manner or connect two adjacent cooling units by using the same connecting pipe instead of the welding manner of the two connecting pipes. The connecting pipe which is not connected with the adjacent cooling unit in one of the two cooling units positioned at the end is connected with a cold source (cooling medium source), and the connecting pipe which is not connected with the adjacent cooling unit in the other cooling unit is connected with the outer discharge pipe, so that the cooling medium sequentially flows through each cooling unit and exchanges heat with the high-temperature flue gas passing through the cooling unit, and then the cooling medium is discharged out of the cooling equipment from the outer discharge pipe.
Here, when there is only one cooling unit, it is also possible in practical applications to use the cooling unit as a cooling device directly for cooling the high-temperature flue gas. When the number of the cooling units is more than 1, the plurality of cooling units are connected in series to form a cooling unit group, and then one or more rows of cooling unit groups are arranged side by side to form the cooling equipment.
Further, when the cooling unit groups have a plurality of rows, the adjacent two rows include, but are not limited to, being arranged in an equal alignment, an equal interval, a staggered arrangement, or a staggered arrangement, and preferably a staggered arrangement.
When the staggered joints are arranged, the high-temperature flue gas can timely pass through the gaps when flowing through the cooling equipment, so that the resistance of the cooling equipment to the high-temperature flue gas is reduced, and the occupied space is saved, and meanwhile, the high-temperature flue gas and the cooling medium are subjected to sufficient heat exchange.
Further, the cooling medium includes, but is not limited to, water or compressed air, preferably water.
The water is used as a cooling medium, so that the water can be recycled, and the water can be conveyed indoors after being added and discharged at high temperature, so that indoor heating is realized, resource utilization is realized, and heat waste is prevented.
The utility model also provides a flue gas treatment system, including high temperature kiln, denitration/sweetener, dust remover, draught fan and chimney, the denitration sweetener import is connected through first flue and high temperature kiln outlet flue, and the denitration sweetener export passes through second flue and dust remover access connection, and the dust remover export is connected with the chimney through the third flue, the draught fan is located in the third flue.
The first flue or/and the second flue is/are internally provided with the cooling device.
When the cooling device is arranged in the first flue, the high-temperature flue gas directly passes through the cooling device after coming out of the high-temperature kiln, the cooling medium circulating in the cooling device exchanges heat with the high-temperature flue gas, the heat of the high-temperature flue gas is taken away, the cooling purpose is achieved, then the high-temperature flue gas passes through the denitration/desulfurization device and then enters the dust remover, the number of cooling units in the cooling device is adjusted in practical application, the temperature of the high-temperature flue gas is guaranteed to be reduced to a working range allowed by the dust remover before entering the dust remover, a waste heat boiler is not needed to be arranged, the cost of the cooling device is low, the production cost is reduced, and the economic benefit is improved.
The cooling device sets up when the second flue, the high temperature flue gas just directly gets into the cooling device after coming out from high temperature kiln through denitration desulfurization equipment, the coolant that circulates carries out the heat exchange with the high temperature flue gas among the cooling device, take away the heat of high temperature flue gas, the quantity of cooling unit among the adjustment cooling device, guarantee before getting into the dust remover, the temperature of high temperature flue gas drop to the working range that the dust remover allows can, also can not need to set up exhaust-heat boiler and just effectively cool down the high temperature flue gas like this.
When the first flue or the second flue is simultaneously provided with the cooling equipment, the cooling equipment in the vertical flue is called as cooling equipment I, and the cooling equipment in the horizontal flue is called as cooling equipment II. Like this high temperature flue gas comes out the back from high temperature kiln earlier and cools down through cooling arrangement one, then further cools down the high temperature flue gas through cooling arrangement two after denitration/desulfurization, and like the same reason, guarantee before getting into the dust remover, the temperature of high temperature flue gas falls to the working range that the dust remover allows can, also can effectively cool down the high temperature flue gas like this without setting up exhaust-heat boiler.
Furthermore, a plurality of cooling devices are stacked in the first flue or/and the second flue along the flow direction of the flue gas.
When the stacking device is arranged, the cooling device is stacked along the direction of the flue gas, and the stacking mode comprises but is not limited to equal-level stacking, staggered joint stacking, equal-level interval stacking and staggered joint interval stacking.
Further, if the first flue and the second flue are vertically arranged vertical flues, the cylinder body of the cooling equipment is vertically arranged.
And if the first flue and the second flue are horizontal flues which are horizontally arranged, the outlet end of the cylinder of the cooling equipment is obliquely arranged downwards.
At vertical flue, the vertical setting of barrel can effectively reduce the resistance that high temperature flue gas passes through cooling arrangement to be favorable to reducing the work load of draught fan, guarantee the normal operating of draught fan under the operating condition.
In horizontal flue, the barrel slope sets up, firstly can get into cooling arrangement smoothly in order to guarantee the high temperature flue gas, secondly because the high temperature flue gas is passing through the cooling arrangement in-process, the dust in the flue gas can adsorb on the casing in the cooling unit, after the slope sets up, the dust can drop to the flue bottom from the barrel exit end under the effect that the flue gas flows to avoid the long-time accumulation of dust to hinder the flue gas flow, and then guarantee cooling arrangement's long-term steady operation.
In addition, in the process of using the cooling equipment, a large amount of dust is adsorbed on the surface of the device and then falls to the bottom of the flue, so that the working pressure of the dust remover can be reduced.
Further, when the cylinder is arranged in an inclined manner, the inclination angle is 15 to 75 degrees, and preferably 30 to 60 degrees.
When the cylinder body is inclined by 30 to 60 degrees, the circulation of the smoke is ensured, and meanwhile, the dust can smoothly fall off from the cooling equipment under the flowing action of the smoke.
Furthermore, an ash removing door is arranged at the flue corresponding to the cooling equipment.
The dust removing door is arranged, when the cooling equipment adsorbs dust due to long-term use or breaks down, the dust of the cooling equipment can be removed from the dust removing door, the cooling equipment can be maintained or replaced in time, and the maintenance and replacement operation is simple, so that the equipment maintenance cost can be effectively reduced.
Drawings
Figure 1-schematic diagram of a prior art flue gas treatment system.
Fig. 2-schematic view of the structure of the cooling unit.
Fig. 3-base:Sub>A isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A in fig. 2.
Fig. 4-schematic view of the arrangement of the connecting tubes.
Fig. 5-schematic view of the structure of the cooling device.
Fig. 6-schematic view of the arrangement of multiple rows of cooling unit groups side by side.
Fig. 7-schematic diagram of the flue gas treatment system of the present invention.
Fig. 8-schematic structural diagram of the second flue gas treatment system of the present invention.
Fig. 9-schematic structural diagram of a third flue gas treatment system of the present invention.
Wherein: 1-a cylinder body; 11-an inner housing; 12-an outer shell; 13-interlayer cavity; 2-connecting pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2 and 3, the cooling unit includes a cylinder 1, the cylinder 1 is provided with a through hole to form a flow channel for flue gas to flow through, the cylinder 1 is provided with an inflow port and an outflow port at intervals, and a cooling channel communicated with the inflow port and the outflow port is arranged in the cylinder 1.
The cylinder 1 is provided with two connecting pipes 2, the two connecting pipes 2 are respectively communicated with the inflow port and the outflow port, one connecting pipe 2 is used for introducing a cooling medium to exchange heat with the flue gas flowing through the flue gas flow channel, and the other connecting pipe is used for discharging the cooling medium after heat exchange.
Therefore, the cooling medium enters the cooling channel from one connecting pipe and exchanges heat with the high-temperature flue gas passing through the flue gas flow channel, so that the temperature of the high-temperature flue gas is reduced, and meanwhile, the cooling medium after heat exchange is discharged from the other connecting pipe.
During specific implementation, barrel 1 is for constituting the double-deck tube structure of interbedded area by interior casing 11 and shell body 12, and the intermediate layer both ends are sealed in order to constitute cooling channel, the through-hole is seted up on interior casing in order to constitute flue gas runner.
Therefore, the inner shell forms a flue gas flow passage, the interlayer cavity formed by the inner shell and the outer shell is a flow passage of a cooling medium, the cooling medium enters the interlayer cavity from one connecting pipe and exchanges heat with high-temperature flue gas passing through the flue gas flow passage, the temperature of the high-temperature flue gas is reduced, and meanwhile the cooling medium after heat exchange is discharged out of the interlayer cavity from the other connecting pipe.
The arrangement of the inflow port and the outflow port includes, but is not limited to, the following two: as shown in fig. 4, the inlet and outlet of the first and second connection pipes 2 are bar-shaped and are respectively disposed at two opposite sides of the outer casing in fig. 4 (a), and correspondingly, the two connection pipes 2 are disposed on the outer casing 12 and the connection ends of the two connection pipes 2 are communicated with the inlet and outlet in the manner of bar-shaped openings, so that the connection pipes can be square pipes; 2. in fig. 4 (b) the inlet and outlet of the fluid are circular and are respectively disposed at two opposite sides of the outer housing, and correspondingly, two connection pipes 2 are disposed on the outer housing 12 and the connection ends of the two connection pipes 2 are communicated with the inlet and outlet in a circular manner, so that the connection pipes can be circular pipes. The inlet and outlet are respectively close to two ends of the cylinder in order to extend the circulation path of the cooling medium. The inflow port and the outflow port can be respectively arranged at two ends of the barrel body and are determined according to actual requirements.
In specific implementation, the cylinder 1 is made of a high temperature resistant metal material, which includes but is not limited to tungsten, platinum, rhodium, carbon steel and tungsten steel, preferably 316L or 310S stainless steel.
The metal materials such as tungsten, platinum, rhodium, carbon steel, tungsten steel or stainless steel and the like are high-temperature resistant, wherein the 316L or 310S stainless steel meets the requirements in performance and is low in cost.
In specific implementation, the cross section of the cylinder 1 is circular, triangular, regular polygonal or non-regular polygonal, preferably regular polygonal.
The triangle comprises an isosceles triangle, an equilateral triangle, an acute angle triangle, an obtuse angle triangle and the like; the regular polygon is a regular N-polygon with the number of sides N being more than or equal to 4, such as a square, a regular pentagon and a regular hexagon … …; the non-regular polygon is an N-sided polygon with the number of sides N being more than or equal to that of the N-sided polygon, such as a rhombus, a parallelogram, a non-regular pentagon and a non-regular hexagon … ….
When the cross section of the cylinder of the cooling unit is a regular polygon, there are at least two advantages: firstly, when the cooling units need to be assembled into the cooling equipment, the cooling units are convenient to stack; secondly, heat-resistant materials are conveniently arranged on the cylinder body (the surface of the outer shell 12, the surface of the inner shell 11 and the surfaces of two ends of the interlayer) subsequently, so that a heat-resistant layer is formed.
The heat-resistant material can determine whether the smoke is corrosive or not according to the smoke components, determine the used ramming mud components according to the difference of the smoke components, and select corundum and the like. The heat-resistant material can effectively prevent the cylinder body made of the metal material from being corroded by acidic or alkaline components in high-temperature flue gas.
The utility model provides a cooling device, cooling device comprises one row or multirow cooling unit group, and every row of cooling unit group is by M preceding the cooling unit establish ties and constitute, and two adjacent cooling units are connected through two connecting pipes 2 that correspond, are located a connecting pipe 2 of two cooling units of end and are connected with cold source and outer pipe outward respectively.
The connection between two adjacent cooling units can connect two connecting pipes in a welding manner or connect two adjacent cooling units by using the same connecting pipe instead of the welding manner of the two connecting pipes. The connecting pipe which is not connected with the adjacent cooling unit in one of the two cooling units positioned at the end is connected with a cold source (cooling medium source), and the connecting pipe which is not connected with the adjacent cooling unit in the other cooling unit is connected with the outer discharge pipe, so that the cooling medium sequentially flows through each cooling unit and exchanges heat with the high-temperature flue gas passing through the cooling unit, and then the cooling medium is discharged out of the cooling equipment from the outer discharge pipe.
Here, when M =1, it is also possible in practical applications to correspond to directly using the cooling unit as a cooling device for cooling the high-temperature flue gas. When M > 1, a plurality of cooling units are connected in series to form a cooling unit group, as shown in fig. 5, the cooling apparatus in this embodiment is formed by connecting four cooling units in series to form a cooling unit group, and the cooling unit may be formed by connecting a plurality of cooling unit groups side by side.
In a specific implementation, when there are multiple rows of cooling unit groups, two adjacent rows include, but are not limited to, being arranged in an equal-aligned arrangement, an equal-spaced arrangement, a staggered arrangement, or a staggered arrangement, and preferably a staggered arrangement.
When the cooling units have a plurality of rows, the cooling devices are arranged side by side, and fig. 6 illustrates several types, wherein fig. 6 (a) shows that all the cooling devices are arranged in an equal alignment, fig. 6 (b) shows that all the cooling devices are arranged in a staggered arrangement, fig. 6 (c) shows that all the cooling devices are arranged in an equal interval arrangement, fig. 6 (d) shows that all the cooling devices are arranged in a staggered interval arrangement, and the cooling devices are not limited to the above four arrangements.
When the staggered joints are arranged, the high-temperature flue gas can timely pass through the gaps when flowing through the cooling equipment, so that the resistance of the cooling equipment to the high-temperature flue gas is reduced, and the occupied space is saved, and meanwhile, the high-temperature flue gas and the cooling medium are subjected to sufficient heat exchange.
In practice, the cooling medium includes, but is not limited to, water or compressed air, preferably water.
The water is used as a cooling medium, so that the water can be recycled, and the water can be conveyed indoors after being added and discharged at high temperature, so that indoor heating is realized, resource utilization is realized, and heat waste is prevented.
The utility model provides a flue gas treatment system, includes high temperature kiln, denitration desulfurization equipment, dust remover, draught fan and chimney, and denitration desulfurization equipment import is connected with high temperature kiln outlet flue through first flue, and denitration desulfurization equipment exports through second flue and dust remover access connection, and the dust remover export is connected with the chimney through the third flue, the draught fan is located in the third flue.
The first flue or/and the second flue is/are internally provided with the cooling device.
The flue gas processing system that cooling arrangement obtained when setting up first flue is shown in figure 7, like this, high temperature flue gas directly passes through cooling arrangement after coming out from high temperature kiln, the cooling medium of circulation carries out the heat exchange with high temperature flue gas in the cooling arrangement, take away the heat of high temperature flue gas, reach the purpose of cooling, then through denitration/sweetener, reentrant dust remover, through the quantity of adjustment cooling unit in the cooling arrangement in practical application, guarantee before getting into the dust remover, the temperature of high temperature flue gas falls to the working range that the dust remover allows can, then just need not set up exhaust-heat boiler, and cooling arrangement low in cost, thereby just can reduce manufacturing cost, improve economic benefits.
The flue gas processing system of cooling arrangement when setting up the second flue is shown in fig. 8, high temperature flue gas just directly gets into cooling arrangement after coming out from high temperature kiln through denitration/sweetener like this, the coolant that circulates among the cooling arrangement carries out the heat exchange with high temperature flue gas, take away the heat of high temperature flue gas, the quantity of cooling unit among the adjustment cooling arrangement, before guaranteeing to get into the dust remover, the temperature of high temperature flue gas falls to the working range that the dust remover allows can, also can need not set up exhaust-heat boiler just so effectively to cool down the high temperature flue gas.
In addition, cooling equipment can also be arranged in the first flue and the second flue simultaneously, and the formed flue gas treatment system is shown in fig. 9, wherein the cooling equipment in the vertical flue is called as cooling equipment I, and the cooling equipment in the horizontal flue is called as cooling equipment II. Like this high temperature flue gas comes out the back from high temperature kiln earlier and cools down through cooling arrangement one, then further cools down the high temperature flue gas through cooling arrangement two after denitration/desulfurization, and like the same reason, guarantee before getting into the dust remover, the temperature of high temperature flue gas falls to the working range that the dust remover allows can, also can effectively cool down the high temperature flue gas like this without setting up exhaust-heat boiler.
During specific implementation, a plurality of cooling devices are stacked in the first flue or/and the second flue along the flow direction of the flue gas.
When the stacking device is arranged, the cooling device is stacked along the direction of the flue gas, and the stacking mode comprises but is not limited to equal-level stacking, staggered joint stacking, equal-level interval stacking and staggered joint interval stacking.
In specific implementation, if the first flue and the second flue are vertical flues which are vertically arranged, the cylinder body 1 of the cooling device is vertically arranged.
If the first flue and the second flue are horizontal flues which are horizontally arranged, the outlet end of the cylinder 1 of the cooling device is obliquely arranged downwards.
At vertical flue, the vertical setting of barrel can effectively reduce the resistance that high temperature flue gas passes through cooling arrangement to be favorable to reducing the work load of draught fan, guarantee the normal operating of draught fan under the operating mode.
In horizontal flue, the barrel exit end sets up in the slope down, firstly can get into cooling arrangement smoothly in order to guarantee the high temperature flue gas, secondly because the high temperature flue gas is passing through the cooling arrangement in-process, the dust in the flue gas can adsorb on the interior casing of cooling unit, after the slope sets up, the dust can drop to the flue bottom from the barrel exit end under the effect that the flue gas flows to avoid the long-time accumulation of dust to hinder the flue gas flow, and then guarantee cooling arrangement's long-term steady operation.
In specific implementation, when the cylinder 1 is arranged obliquely, the inclination angle is 15 to 75 degrees, and preferably 30 to 60 degrees.
When the cylinder body is inclined at an angle of 30 to 60 degrees, the circulation of the smoke is ensured, and meanwhile, the dust can smoothly fall off from the cooling equipment under the flowing action of the smoke.
When the cooling device is specifically implemented, the ash removing door is arranged at the flue corresponding to the cooling device.
The dust removing door is arranged, when the cooling equipment adsorbs dust due to long-term use or breaks down, the dust of the cooling equipment can be removed from the dust removing door, the cooling equipment can be maintained or replaced in time, and the maintenance and replacement operation is simple, so that the equipment maintenance cost can be effectively reduced.
Examples
In the embodiment, the cooling device is arranged in the first flue (the first flue is a vertical flue) to cool the high-temperature flue gas. The high-temperature kiln adopts total-oxygen combustion natural gas, and the actual working condition flue gas amount is 14000 m 3 H, vertical flue cross-sectional area 2.25 m 2 The total length of the vertical flue is 7 m, the flue gas temperature is 1310 ℃ at the maximum, and the target temperature is reduced to about 400 ℃. The main components of the flue gas comprise 34% of water vapor, 45% of nitrogen, 10% of oxygen, 6% of nitric oxide, 3% of carbon monoxide and 2% of sulfide.
Water is selected as the cooling medium, the flow rate of water flow is 2 m/s, and the temperature of inlet water is 22 ℃. The cylinder body of the cooling unit is made of 310S stainless steel, the thickness of the interlayer cavity is 0.025 m, the cross section of the cylinder body is square, and the cross section area is that the length is multiplied by the width =0.05 m multiplied by 0.05 m =0.0025 m 2 The length of the cylinder is 0.3 m.
1~5 cooling devices are stacked in turn in the height direction of the vertical flue along the flow direction of the flue gas, each cooling device comprises 14 cooling unit groups, each cooling unit group comprises 14 cooling units, namely 196 cooling units are arranged in each cooling device. Experimental data were collected while placing 1~5 cooling apparatuses. In addition: because the cooling unit is put into the flue and can hinder the mobility of flue gas, increase flue gas flow resistance, lead to draught fan induced draft frequency to increase, so need consider the flue gas resistance problem in step, the load of draught fan does not exceed 80%. The experimental data obtained are shown in the following table:
| serial number | Cooling device/an | Initial temperature/. Degree.C | Temperature/. Degree.C after cooling | Temperature difference/. Degree.C | Temperature of water outlet/. Degree.C | Load of |
| 1 | 0 | 1310 | 1310 | 0 | / | 50% |
| 2 | 1 | 1310 | 1186 | 124 | 85 | 53% |
| 3 | 2 | 1186 | 722 | 464 | 84 | 62% |
| 4 | 3 | 722 | 536 | 186 | 72 | 66% |
| 5 | 4 | 536 | 411 | 125 | 68 | 71% |
| 6 | 5 | 411 | 298 | 113 | 66 | 76% |
From the above table, when the number of the cooling devices reaches four, including 784 cooling units, the temperature of the high-temperature flue gas after temperature reduction is 411 ℃, the water outlet temperature is 68 ℃, and the load of the induced draft fan is 71%. Show to adopt the cooling arrangement handle the high temperature flue gas, can effectively carry out cooling to the high temperature flue gas.
Finally, it should be noted that the above-mentioned embodiments of the present invention are only examples for illustrating the present invention, and are not limitations to the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes or variations which are introduced by the technical solution of the present invention are still within the scope of the present invention.
Claims (14)
1. A cooling unit is characterized by comprising a cylinder body, wherein the cylinder body is provided with a through hole to form a flow channel for smoke to flow through, the cylinder body is provided with an inflow port and an outflow port at intervals, and a cooling channel communicated with the inflow port and the outflow port is arranged in the cylinder body;
the cylinder body is provided with two connecting pipes which are respectively communicated with the inflow port and the outflow port, one connecting pipe is used for introducing a cooling medium to exchange heat with the smoke flowing through the smoke flow channel, and the other connecting pipe is used for discharging the cooling medium after heat exchange.
2. The cooling unit of claim 1, wherein the cylinder has a double-layer cylinder structure with a sandwich layer formed by an inner shell and an outer shell, the sandwich layer is closed at two ends to form the cooling channel, and the through hole is opened on the inner shell to form the flue gas flow passage.
3. A cooling unit according to claim 2, wherein the cross-section of the cylinder is circular, triangular, regular polygonal or non-regular polygonal.
4. A cooling unit according to claim 3, wherein the cross-section of the cylinder is a regular polygon.
5. A cooling unit according to claim 3, wherein the surfaces of the outer casing, the inner casing and the sandwich layer are provided with heat resistant layers.
6. A cooling device, characterized in that, the cooling device comprises one or more rows of cooling unit groups, each row of cooling unit group comprises a plurality of cooling units according to 1~5 connected in series, two adjacent cooling units are connected through two corresponding connecting pipes, one connecting pipe of the two cooling units at the end is respectively connected with a cold source and an outer discharge pipe.
7. The cooling apparatus as claimed in claim 6, wherein when the cooling unit groups have a plurality of rows, adjacent two rows are arranged in an equi-alignment arrangement, an equi-spaced arrangement, a staggered arrangement or a staggered arrangement.
8. A cooling apparatus according to claim 7, wherein two adjacent rows are arranged in a staggered arrangement.
9. A cooling arrangement according to claim 7, characterised in that the cooling medium is water or compressed air.
10. A cooling apparatus according to claim 9, characterized in that the cooling medium is water.
11. A flue gas treatment system is characterized by comprising a kiln, denitration/desulfurization equipment, a dust remover, an induced draft fan and a chimney, wherein an inlet of the denitration and desulfurization equipment is connected with a smoke outlet of the kiln through a first flue, an outlet of the denitration and desulfurization equipment is connected with an inlet of the dust remover through a second flue, an outlet of the dust remover is connected with the chimney through a third flue, and the induced draft fan is arranged in the third flue;
the first flue or/and the second flue are/is internally provided with cooling equipment as claimed in any one of claims 6 to 10.
12. The flue gas treatment system of claim 11, wherein if the first flue and the second flue are vertically arranged vertical flues, the cylinder of the cooling device is vertically arranged;
and if the first flue and the second flue are horizontal flues which are horizontally arranged, the outlet end of the cylinder of the cooling equipment is obliquely arranged downwards.
13. The flue gas treatment system according to claim 12, wherein the inclination angle is 15 to 75 ° when the cylinder is inclined.
14. A flue gas treatment system according to claim 13, wherein the angle of inclination is 30 to 60 °.
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