CN104729308A - Mesh belt type continuous heating carburizing furnace door cover flame waste heat recovery reusing device - Google Patents
Mesh belt type continuous heating carburizing furnace door cover flame waste heat recovery reusing device Download PDFInfo
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Abstract
The invention discloses a mesh belt type continuous heating carburizing furnace door cover flame waste heat recovery reusing device which comprises an upper heat exchanging part, a lower heat exchanging part, a water outlet pipe, a water inlet pipe, a connecting pipe and a square circular pipeline. The upper heat exchanging part comprises an upper cover body and an upper heat exchanging pipe bundle. The lower heat exchanging part comprises a lower cover body and a lower heat exchanging pipe bundle. The water outlet pipe is communicated with the upper heat exchanging pipe bundle. The water inlet pipe is communicated with the lower heat exchanging pipe bundle. The connecting pipe is communicated with the upper heat exchanging pipe bundle and the lower heat exchanging pipe bundle. The square circular pipeline is in sealing connection with the upper cover body and the lower cover body. A spiral groove is formed in the inner wall of a heat exchanging pipe. A heat transferring fin is arranged on the outer wall of the heat exchanging pipe. A heat insulation layer is coated in the device. According to the mesh belt type continuous heating carburizing furnace door cover flame waste heat recovery reusing device, carburizing furnace door cover flames and smoke waste heat are subjected to recovery reusing, energy waste is avoided, energy is saved, guiding demonstration effect is achieved on energy-saving emission-reducing working, the heat treatment energy-consumption index is lowered, flame outlet temperature is lowered, safety is improved, and meanwhile production cost is lowered.
Description
Technical field
The present invention relates to carburizer waste heat recovery recycling field, be specifically related to a kind of net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device.
Background technology
Carburization process is widely used in the industrial circles such as metal heat treatmet, metallurgy, forging, in order to improve the mechanical performance of metal material, usual use carburizer carries out Carburization Treatment to it, and the cementing plant that net belt type laser heating carburizer is commonly used just, the net belt type laser heating carburizer generally applied at present enters in stove to stop the oxygen in air the oxidation causing workpiece, adopt the mode of establishing flame at carburizer fire door place, consume the oxygen in stove air by the burning of combustion gas; Firedoor hood flame is pulse state, temperature is higher, very easily causes fire because of contingency factor, and the flue gas after traditional net belt type laser heating carburizer firedoor hood flame and fuel gas buring directly enters air, comprising flame waste heat and fume afterheat, cause the waste of the energy; And recycling device or the method not for carburizer firedoor hood flame waste heat in prior art.
Due to the existence of the problems referred to above, the present inventor furthers investigate existing net belt type laser heating carburizer, fully can reclaim to produce and utilize the apparatus and method of carburizer firedoor hood flame waste heat.
Summary of the invention
In order to overcome the problems referred to above, present inventor has performed and study with keen determination, found that: at carburizer firedoor hood flame outer setting waste heat recovery re-use device, for reclaiming firedoor hood flame and fume afterheat, energy waste can be avoided; Wrapped up completely by firedoor hood flame with lower cover, connection side's round pipe, upper outlet body and flue in turn on lower cover, the flue gas produced after flame combustion is discharged through above-mentioned passage, and flue upper end outlet place temperature is significantly reduced, and improves security; At lower cover and upper outlet body inside, lower heat-exchanging tube bundle and upper heat-exchanging tube bundle are set respectively, abundant absorption firedoor hood flame and fume afterheat, and transfer heat to the cooling fluid of heat exchange Bottomhole pressure, cooling fluid is delivered to drum washing machine tank, for cleaning workpiece in heat treatment production process, to realize the recycling reclaiming heat, economize energy, reduce heat treatment energy consumption index; Upper heat-exchanging tube bundle and lower heat-exchanging tube bundle include multiple heat exchanger tube, heat exchanger tube inwall is provided with spiral grooves, heat exchanger tube outer wall is provided with thermofin, improve the coefficient of heat transfer of heat exchanger tube inner side and outer side, improve exchange capability of heat, make to reduce for reaching heat exchanger tube quantity needed for identical exchange capability of heat, heat-exchanging tube bundle compact conformation, volume are little, lightweight; At this device inside coating insulating, suppress the heat of flame and flue gas to scatter and disappear through wall conduction, improve radiant heat transfer efficiency in device; heat exchanger tube is made to absorb more heats; improve the rate of recovery to firedoor hood flame and fume afterheat, and protect the inwall of this device, increase the service life.
The object of the present invention is to provide following aspect:
(1) a net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device, it is characterized in that, this device comprises:
Upper heat exchanger components 1, it upper heat-exchanging tube bundle 12 comprising upper outlet body 11 and be arranged at upper outlet body 11 inside, described upper heat-exchanging tube bundle 12 comprises multiple heat exchanger tube 3, is provided with is attached thereto logical outlet pipe 4 on upper heat-exchanging tube bundle 12 top;
Lower heat exchanger components 2, it lower heat-exchanging tube bundle 22 comprising lower cover 21 and be arranged at lower cover 21 inside, described lower heat-exchanging tube bundle 22 comprises multiple heat exchanger tube 3, is provided with is attached thereto logical water inlet pipe 5 in lower heat-exchanging tube bundle 22 bottom;
Tube connector 6, it is connected with lower heat-exchanging tube bundle 22 with upper heat-exchanging tube bundle 12 respectively; With
Circumference pipeline 7, it is tightly connected with upper outlet body 11 and lower cover 21 respectively;
Insulating is coated with in the inside of described net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device.
(2) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), it is characterized in that, multiple heat exchanger tubes 3 on described in heat exchanger components 1 laid out in parallel abreast mutually, be provided with the upper collecting pipe 1 be communicated with multiple heat exchanger tube 3 respectively in upper heat exchanger components 1 one end, be provided with the lower collecting pipe 1 be communicated with multiple heat exchanger tube 3 respectively at upper heat exchanger components 1 other end;
Multiple heat exchanger tubes 3 in described lower heat exchanger components 2 laid out in parallel abreast mutually, be provided with the upper collecting pipe 2 221 be communicated with multiple heat exchanger tube 3 respectively in lower heat exchanger components 2 one end, be provided with the lower collecting pipe 2 222 be communicated with multiple heat exchanger tube 3 respectively at lower heat exchanger components 2 other end.
(3) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), it is characterized in that, described heat exchanger tube 3 inwall is provided with spiral grooves 31, heat exchanger tube 3 outer wall is provided with thermofin 32;
The gash depth of described spiral grooves 31 is 0.8 ~ 0.9mm, and the groove width of spiral grooves 31 is 0.8 ~ 0.9mm, and the groove pitch of spiral grooves 31 is 6 ~ 8mm, and the helical angle of spiral grooves 31 is 25 ~ 28 °;
Described thermofin 32 is spiral fin, and thermofin 32 is made up of aluminium alloy, and the fin thickness of thermofin 32 is 0.5 ~ 1mm.
(4) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (3), it is characterized in that, described insulating comprises high temperature radiating coating material layer.
(5) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), it is characterized in that, described heat-insulation and heat-preservation layer thickness is 0.2 ~ 0.5mm.
(6) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), is characterized in that, described insulating is coated on the inwall of upper outlet body 11, circumference pipeline 7 and lower cover 21.
(7) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), it is characterized in that, described water inlet pipe 5, lower collecting pipe 2 222, lower heat-exchanging tube bundle 22, upper collecting pipe 2 221, tube connector 6, lower collecting pipe 1, upper heat-exchanging tube bundle 12, upper collecting pipe 1, outlet pipe 4 are communicated with in turn, form the cavity for cooling fluid circulation.
(8) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), is characterized in that, the lower cover 21 of described lower heat exchanger components 2 is installed on carburizer firedoor hood flame outside.
(9) the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to above-mentioned (1), it is characterized in that, described carburizer is provided with the drum washing machine tank 9 for cleaning workpiece, and described outlet pipe 4 is communicated to described drum washing machine tank 9.
(10) a net belt type laser heating carburizer firedoor hood flame waste heat recovery reuse method, is characterized in that, the method adopts the device as described in above-mentioned (1) to (9).
The beneficial effect that the present invention has comprises:
(1) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is installed on carburizer firedoor hood flame outside, for reclaiming firedoor hood flame and fume afterheat, avoids energy waste;
(2) firedoor hood flame is wrapped in lower cover inside by net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention completely, the flue gas produced after flame combustion is discharged through lower cover, circumference pipeline, upper outlet body and flue, and there is heat exchange therein, flue upper end outlet place temperature is significantly reduced, reduce because accidentalia causes the possibility of fire, improve security;
(3) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention arranges lower heat-exchanging tube bundle and upper heat-exchanging tube bundle respectively at lower cover and upper outlet body inside, abundant absorption firedoor hood flame and fume afterheat, and transfer heat to heat exchange Bottomhole pressure cooling fluid, cooling fluid is delivered to drum washing machine tank, for cleaning workpiece in heat treatment production process, to realize the recycling reclaiming heat, economize energy, reduce the average energy consumption index of heat treatment, make it reach world-class levels;
(4) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention eliminates in existing production technology for providing the electric heater of hot water for drum washing machine, reduce production cost, and save a large amount of electric energy, reduce the dust and harmful gas emission that produce because of burning coal generating, for energy-saving and emission-reduction work, there is guiding exemplary role, in the long run, apply this device and can bring obvious Social benefit and economic benefit;
(5) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is provided with spiral grooves on heat exchanger tube inwall, cooling fluid is made to produce screw in heat exchanger tube, and there is certain radial velocity, thus heat convection in thermoexcell effectively, improve the coefficient of heat transfer inside heat exchanger tube; Heat exchanger tube outer wall is provided with thermofin, increases the contact area of heat exchanger tube and flame and flue gas, improve the coefficient of heat transfer outside heat exchanger tube, the Composite Walls of heat exchanger tube is improved; Thus improve the exchange capability of heat of heat exchanger tube, make to reduce for reaching heat exchanger tube quantity needed for identical exchange capability of heat, heat-exchanging tube bundle compact conformation, volume are little, lightweight;
(6) in net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention, the helical angle of heat exchanger tube spiral grooves and pitch can adjust easily, change in process, to adapt to different medium, and take into account flow resistance, range of application is wide; Heat exchanger tube is easy to processing in enormous quantities fast, reduces production cost;
(7) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is at heat exchanger tube outside coating radiant heat absorbent layer, improve the ability that heat exchanger tube absorbs flame and gas radiation heat, improve the rate of recovery to firedoor hood flame and fume afterheat;
(8) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is coated with insulating on the inwall of this device, the heat of flame and flue gas is suppressed to scatter and disappear through wall conduction, improve radiant heat transfer efficiency in device, make heat exchanger tube absorb more heats, thus improve the rate of recovery to firedoor hood flame and fume afterheat; Meanwhile, the inwall of this device is played a protective role, increases the service life.
Accompanying drawing explanation
Fig. 1 illustrates the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device overall structure schematic diagram according to a kind of preferred embodiment of the present invention;
Fig. 2 illustrates the upper heat-exchanging tube bundle structural representation of the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to a kind of preferred embodiment of the present invention;
Fig. 3 illustrates the lower heat-exchanging tube bundle structural representation of the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to a kind of preferred embodiment of the present invention;
Fig. 4 illustrates the heat exchange tube structure schematic diagram of the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to a kind of preferred embodiment of the present invention;
Fig. 5 illustrates the closed circuit structural representation formed according to the net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device of a kind of preferred embodiment of the present invention;
Fig. 6 illustrates the structural relation schematic diagram of net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to a kind of preferred embodiment of the present invention and carburizer.
Drawing reference numeral explanation
The upper heat exchanger components of 1-
11-upper outlet body
The upper heat-exchanging tube bundle of 12-
The upper collecting pipe one of 121-
Collecting pipe one under 122-
Heat exchanger components under 2-
21-lower cover
Heat-exchanging tube bundle under 22-
The upper collecting pipe two of 221-
Collecting pipe two under 222-
3-heat exchanger tube
31-spiral grooves
32-thermofin
4-outlet pipe
41-relief valve assembly
5-water inlet pipe
51-sewage draining exit
52-Pressure gauge
53-thermometer
54-stop valve
55-water circulating pump
6-tube connector
7-has an area of pipeline
8-flue
9-drum washing machine tank
10-net belt type laser heating carburizer
Detailed description of the invention
Below by drawings and Examples, the present invention is described in more detail.Illustrated by these, the features and advantages of the invention will become more explicit.
Word " exemplary " special here means " as example, embodiment or illustrative ".Here need not be interpreted as being better than or being better than other embodiment as any embodiment illustrated by " exemplary ".Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, accompanying drawing need not be drawn in proportion.
In a preferred embodiment in accordance with the present invention, as shown in Figure 1, provide a kind of net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device, this device comprises:
Upper heat exchanger components 1, it upper heat-exchanging tube bundle 12 comprising upper outlet body 11 and be arranged at upper outlet body 11 inside, described upper heat-exchanging tube bundle 12 comprises multiple heat exchanger tube 3, is provided with is attached thereto logical outlet pipe 4 on upper heat-exchanging tube bundle 12 top;
Lower heat exchanger components 2, it lower heat-exchanging tube bundle 22 comprising lower cover 21 and be arranged at lower cover 21 inside, described lower heat-exchanging tube bundle 22 comprises multiple heat exchanger tube 3, is provided with is attached thereto logical water inlet pipe 5 in lower heat-exchanging tube bundle 22 bottom;
Tube connector 6, it is connected with lower heat-exchanging tube bundle 22 with upper heat-exchanging tube bundle 12 respectively;
Circumference pipeline 7, it is tightly connected with upper outlet body 11 and lower cover 21 respectively;
Insulating is coated with in the inside of described net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device.
In a preferred embodiment in accordance with the present invention, as shown in Figure 1, on upper outlet body 11 top, flue 8 is installed, lower cover 21, circumference pipeline 7, upper outlet body 11 and flue 8 are tightly connected in turn, and the flue gas that carburizer firedoor hood flame produces is discharged through lower cover 21, circumference pipeline 7, upper outlet body 11 and flue 8 successively.
In a preferred embodiment in accordance with the present invention, as shown in Figure 2, multiple heat exchanger tubes 3 on described in heat exchanger components 1 laid out in parallel abreast mutually, the two ends of every root heat exchanger tube 3 are connected with lower collecting pipe 1 with upper collecting pipe 1 respectively, form the entirety that an inside is interconnected, cooling fluid flows into lower collecting pipe 1, then branches to each heat exchanger tube 3, then collects the upper collecting pipe 1 of inflow.
In a preferred embodiment in accordance with the present invention, as shown in Figure 3, multiple heat exchanger tubes 3 in described lower heat exchanger components 2 laid out in parallel abreast mutually, the two ends of every root heat exchanger tube 3 are connected with lower collecting pipe 2 222 with upper collecting pipe 2 221 respectively, form the entirety that an inside is interconnected, cooling fluid flows into lower collecting pipe 2 222, then branches to each heat exchanger tube 3, then collects the upper collecting pipe 1 of inflow.
Described upper heat-exchanging tube bundle 12 and lower heat-exchanging tube bundle 22 to be interconnected composition by upper collecting pipe, heat exchanger tube 3 and lower collecting pipe, make cooling fluid back and forth flowing in heat exchanger tube 3, and then the waste heat fully absorbed in flame and flue gas, and rely on conversion and the transmission of the collecting-shunt of cooling fluid-collect to realize heat.
In a preferred embodiment in accordance with the present invention, as shown in Figure 4, heat exchanger tube 3 inwall is provided with spiral grooves 31, heat exchanger tube 3 outer wall is provided with thermofin 32;
The gash depth of described spiral grooves 31 is 0.8 ~ 0.9mm, and the groove width of spiral grooves 31 is 0.8 ~ 0.9mm, and the groove pitch of spiral grooves 31 is 6 ~ 8mm, and the helical angle of spiral grooves 31 is 25 ° ~ 28 °; Spiral grooves 31 on heat exchanger tube 3 inwall makes cooling water produce screw in heat exchanger tube, and has certain radial velocity, thus heat convection in thermoexcell effectively, improve the coefficient of heat transfer inside heat exchanger tube 3; The helical angle of heat exchanger tube 3 spiral grooves 31 and pitch can adjust easily, change in process, and to adapt to different medium, and take into account flow resistance, range of application is wide; Heat exchanger tube 3 is easy to processing in enormous quantities fast, reduces production cost;
Described thermofin 32 is spiral fin, and thermofin 32 is made up of aluminium alloy, and the fin thickness of thermofin 32 is 0.5 ~ 1mm; Thermofin 32 on heat exchanger tube 3 outer wall increases the contact area of heat exchanger tube 3 and flame and flue gas, improves the coefficient of heat transfer outside heat exchanger tube 3;
The spiral grooves 31 that described heat exchanger tube 3 is arranged and thermofin 32 make the Composite Walls of heat exchanger tube 3 increase, and improve exchange capability of heat, make to reduce for reaching heat exchanger tube quantity needed for identical exchange capability of heat, and heat-exchanging tube bundle compact conformation, volume are little, lightweight.
In a preferred embodiment in accordance with the present invention, radiant heat absorbent layer is coated with in heat exchanger tube 3 outside, described radiant heat absorbent layer is to the absorbent coating of radiant heat, it is distributed in heat exchanger tube 3 outer surface, improve the absorbability of heat exchanger tube 3 pairs of carburizer flames and gas radiation heat, thus more heat is passed to the cooling fluid of heat exchanger tube 3 inside, improve the organic efficiency to flame and fume afterheat;
Described radiant heat absorbent layer adopts radiant heat absorbent coatings to form, thickness is 0.1 ~ 0.3mm, described radiant heat absorbent coating can be iron micro mist coating, graphite paint, carbon nano-tube coating, carborundum coating etc. conventional in this area, preferably selects carborundum coating in the present invention.
In a preferred embodiment in accordance with the present invention, the inwall of upper outlet body 11, circumference pipeline 7 and lower cover 21 is coated with insulating, described insulating is the coating suppressing carburizing furnace heat outwards to transmit through wall, described insulating adopts high temperature radiating coating material coating to form, thickness is 0.2 ~ 0.5mm, its preparation method comprises: adopted by high temperature radiating coating material the modes such as spraying or brushing to coat on the inwall of upper outlet body 11, circumference pipeline 7 and lower cover 21 equably, 20 ~ 40 DEG C of dryings 12 ~ 48 hours, namely obtain described insulating;
The preparation method of described high temperature radiating coating material comprises: the Powdered zirconium dioxide (ZrO by particle diameter being 70 ~ 150 μm
2), di-iron trioxide (Fe
2o
3), chrome green (Cr
2o
3), silica (SiO
2) according to (2 ~ 2.5): (2 ~ 2.5): (2.5 ~ 3.5): the part by weight mixing of (1 ~ 1.5), add the binding agent of above-mentioned powder gross mass 7 ~ 15%, mix, in 1000 ~ 1600 DEG C of calcinings 9 ~ 12 hours; Be down to room temperature, in ball mill, process 20 ~ 40 minutes, obtain the particle that particle diameter is 40 ~ 60 μm; Above-mentioned particle and supensoid agent, dispersant is even, ultrasonic wave dispersion 30 ~ 50 minutes, the slurry obtaining thickness is described high temperature radiating coating material;
Described binding agent can be bentonite, waterglass, Ludox etc. conventional in this area, and the present invention preferably selects Ludox; Described suspending agent can be sodium carboxymethylcellulose, polyvinyl alcohol, polyvinyl butyral resin, organic modified bentonite etc. conventional in this area, and the present invention preferably selects sodium carboxymethylcellulose; Described dispersant can be polyacrylic acid, modified polyamide, phosphate diester, phosphate monoester etc. conventional in this area, and the present invention preferably selects polyacrylic acid;
Described high temperature radiating coating material average radiation rate at 600 ~ 1000 DEG C is 0.85, and its insulating be prepared into effectively suppresses the heat of flame and flue gas to scatter and disappear through wall conduction; And the heat of flame and flue gas is passed to heat exchanger tube 3 with forms of radiation, improve radiant heat transfer efficiency in device, make heat exchanger tube 3 absorb more heats, thus improve the rate of recovery to firedoor hood flame and fume afterheat; Meanwhile, described insulating has the characteristics such as high temperature resistant, anticorrosive, plays a protective role, increase the service life to the inwall of this device.
In a preferred embodiment in accordance with the present invention, as shown in Figure 5, net belt type laser heating carburizer is configured with drum washing machine, for the cleaning of workpiece in heat treatment production process, drum washing machine comprises drum washing machine tank 9, be marked with water for cleaning in it, in the prior art, water for cleaning is heated to temperature required by the electric heater be installed near drum washing machine;
After net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device is installed, by reclaiming carburizer firedoor hood flame and fume afterheat, for in heat treatment production process, cleaning workpiece step provides hot water, eliminate in existing production technology for providing the electric heater of hot water, avoid energy waste, and save a large amount of electric energy, reduce the dust and harmful gas emission that produce because of burning coal generating, according to statistics, often this device is installed, year decreasing pollution discharge 67.3t carbon dust, 246.9t carbon dioxide (CO
2), 7.4t sulfur dioxide (SO
2) and 3.7t nitrogen oxide (NO
x), for energy-saving and emission-reduction work, there is guiding exemplary role; Reduce production cost, reduce the average energy consumption of heat treatment simultaneously, the average energy consumption index of heat treatment can be made to be reduced to below 280kWh/ ton workpiece from original 550kWh/ ton workpiece, lower than world-class 320kWh/ ton workpiece; In the long run, apply this device and can bring obvious Social benefit and economic benefit.
In a preferred embodiment in accordance with the present invention, as shown in Figure 5, water inlet pipe 5, lower collecting pipe 2 222, lower heat-exchanging tube bundle 22, upper collecting pipe 2 221, tube connector 6, lower collecting pipe 1, upper heat-exchanging tube bundle 12, upper collecting pipe 1, outlet pipe 4, drum washing machine tank 9 are communicated with in turn, form the passage for cooling fluid circulation;
Cooling fluid flows into lower collecting pipe 2 222 through water inlet pipe 5, then lower heat-exchanging tube bundle 22 is flowed into, first time heat exchange is there is in lower heat-exchanging tube bundle 22, the heat of firedoor hood flame passes to cooling fluid by the heat exchanger tube 3 of lower heat-exchanging tube bundle 22, cooling fluid collects the upper collecting pipe 2 221 of inflow, lower collecting pipe 1 is continued to flow into through tube connector 6, then upper heat-exchanging tube bundle 12 is flowed into, second time heat exchange is there is in upper heat-exchanging tube bundle 12, the heat of firedoor hood flame and the heat of flue gas pass to cooling fluid by the heat exchanger tube 3 of upper heat-exchanging tube bundle 12, cooling fluid collects the upper collecting pipe 1 of inflow, enter outlet pipe 4, cooling fluid is heated to 60 ~ 70 DEG C by twice heat exchange, and the cooling fluid after heating is transported to drum washing machine tank 9, for cleaning workpiece through outlet pipe 4.
In a preferred embodiment in accordance with the present invention, for reaching the object heat of recovery being used for cleaning workpiece in heat treatment production process, cooling fluid preferably selects water, simple and easy to get, with low cost, the cleaning of workpiece in heat treatment production process is can be used for again, to realize the recycling to reclaiming heat while possessing excellent heat absorption and heat conductivility.
In a preferred embodiment in accordance with the present invention, as shown in Figure 5, drum washing machine tank 9 is connected with outlet pipe 4 respectively with water inlet pipe 5, the pipeline that whole cooling fluid is circulated becomes the closed-loop path be interconnected, after the cooling fluid heated is used to cleaning workpiece in drum washing machine tank 9, coolant temperature reduces, heat exchanger components 2 under again flowing into along the water inlet pipe 5 be connected on drum washing machine tank 9 after treatment, proceed the recycle and reuse of heat, cooling fluid is recycled, save great lot of water resources, reduce cost.
In a preferred embodiment in accordance with the present invention, as shown in Figure 5, water inlet pipe 5 is provided with Pressure gauge 52 and thermometer 53, for the pressure and temperature of this device inside of Real-Time Monitoring, to adjust each part runs situation at any time, ensures the normal use of this device;
Water inlet pipe 5 is provided with water circulating pump 55, for the cooling fluid after process is delivered to water inlet pipe 5 from drum washing machine tank 9, to realize recycling of cooling fluid, reduces costs;
Water circulating pump 55 both sides on water inlet pipe 5 are provided with stop valve 54, for regulating the flow of cooling fluid, ensureing this equipment safety, normally running;
Outlet pipe 4 exit is provided with relief valve assembly 41, and when in device, pressure rising reaches predetermined value, relief valve assembly 41 opens pressure release automatically, prevents pressure from continuing to raise; When in device, pressure is reduced to setting, relief valve assembly 41 is closed in time automatically, and in anti-locking apparatus, cooling fluid runs off in a large number, and this device internal pressure controls in tolerance range, can ensureing this equipment safety, normally run by described relief valve assembly 41;
Sewage draining exit 51 is offered, for clearing up the dirt in this device in water inlet pipe 5 porch.
In a preferred embodiment in accordance with the present invention, as shown in Figure 6, lower cover 21 is installed on the outside of carburizer firedoor hood flame, size and the flame flame envelope shape of lower cover 21 internal cavities adapt, make flame be positioned at the optimum position of lower cover 21 internal cavity, and then fully absorb the waste heat of flame and flue gas by the lower heat-exchanging tube bundle 22 being arranged on lower cover 21 inside, make full use of the heat of firedoor hood flame, avoid energy waste, save production cost;
In addition, net belt type laser heating carburizer firedoor hood flame is positioned at the over top of carburizer, after net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is installed, the structure of parts each on carburizer, function are had no effect or space constraint.
In a preferred embodiment in accordance with the present invention, a kind of net belt type laser heating carburizer firedoor hood flame waste heat recovery reuse method is provided, the method adopts described net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device, this device is placed near carburizer firedoor hood flame, fully to reclaim flame and fume afterheat, the heat of recovery is passed to cooling fluid by lower heat exchanger components 2 and upper heat exchanger components 1, coolant temperature is raised, and the cooling fluid after heating is delivered to drum washing machine tank 9, for the cleaning to workpiece in heat treatment production process, to realize the recovery and reuse of carburizer firedoor hood flame waste heat.
Embodiment
The preparation of embodiment 1 high temperature radiating coating material
Be the Powdered zirconium dioxide (ZrO of 100 ~ 120 μm by particle diameter
2), di-iron trioxide (Fe
2o
3), chrome green (Cr
2o
3), silica (SiO
2) mix according to the part by weight of 2:2:3:1, add the Ludox of above-mentioned powder gross mass 12%, mix, in 1300 DEG C of calcinings 10 hours; Be down to room temperature, in ball mill, process 25 minutes, obtain the particle that particle diameter is 40 ~ 60 μm; Mixed with sodium carboxymethylcellulose, polyacrylic acid by above-mentioned particle, ultrasonic wave disperses 40 minutes, and the slurry obtaining thickness is described high temperature radiating coating material.
The preparation of embodiment 2 insulating
Adopted by the high temperature radiating coating material prepared according to method described in embodiment 1 spraying method to coat equably on the inwall of upper outlet body 11, circumference pipeline 7 and lower cover 21,25 DEG C of dryings 48 hours, namely obtain described insulating.
Experimental example
The net belt type laser heating carburizer of a 1650kW, at its firedoor hood flame location, net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device of the present invention is installed, obtains relevant parameter according to actual measurement as follows:
Firedoor hood flame inlet temperature: 405 DEG C
Flue upper outlet temperature: 155 DEG C
Coolant rate: 6.3t/h
Coolant temperature in water inlet pipe: 28 DEG C
Coolant temperature in outlet pipe: 59.4 DEG C
The thermic load that firedoor hood flame reclaims: 230kW
Can calculate net belt type laser heating carburizer annual savable mark coal amount after installation waste heat recovery re-use device provided by the invention of above-mentioned 1650kW according to above parameter, computing formula is as follows:
m＝N×860÷Q×T
Wherein, m-mark coal amount, kg;
The thermic load of N-recovery, kW, 1kW=860kcal/h, m=230kW in this experimental example;
Q-mark coal low heat value, kcal/kg, regulation Q=7000kcal/kg;
T-working time in net belt type laser heating carburizer year, h.
If calculate by annual work 7000h, the net belt type laser heating carburizer of above-mentioned 1650kW can save mark about 197.8 tons, coal every year after installation waste heat recovery re-use device provided by the invention.
Described net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device fully reclaims carburizer firedoor hood flame waste heat, and recycled cleaning workpiece water in heat hot processing production process, eliminate the electric heater for heated wash workpiece water in prior art, greatly reduce production cost; It is inner that firedoor hood flame is wrapped in this device, and flue upper outlet temperature significantly reduces, and reduces by the possibility of contingency factor initiation fire and the economic loss that causes thus; The carburizer thermal efficiency improves 14%, reduces heat treatment energy consumption index, makes it reach advanced world standards, be conducive to the international development of China's heat treatment industry.
The beneficial effect that the present invention has comprises:
(1) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is installed on carburizer firedoor hood flame outside, for reclaiming firedoor hood flame and fume afterheat, avoids energy waste;
(2) firedoor hood flame is wrapped in lower cover inside by net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention completely, the flue gas produced after flame combustion is discharged through lower cover, circumference pipeline, upper outlet body and flue, and there is heat exchange therein, flue upper end outlet place temperature is significantly reduced, reduce because accidentalia causes the possibility of fire, improve security;
(3) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention arranges lower heat-exchanging tube bundle and upper heat-exchanging tube bundle respectively at lower cover and upper outlet body inside, abundant absorption firedoor hood flame and fume afterheat, and transfer heat to heat exchange Bottomhole pressure cooling fluid, cooling fluid is delivered to drum washing machine tank, for cleaning workpiece in heat treatment production process, to realize the recycling reclaiming heat, economize energy, reduce the average energy consumption index of heat treatment, make it reach world-class levels;
(4) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention eliminates in existing production technology for providing the electric heater of hot water for drum washing machine, reduce production cost, and save a large amount of electric energy, reduce the dust and harmful gas emission that produce because of burning coal generating, for energy-saving and emission-reduction work, there is guiding exemplary role, in the long run, apply this device and can bring obvious Social benefit and economic benefit;
(5) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is provided with spiral grooves on heat exchanger tube inwall, cooling fluid is made to produce screw in heat exchanger tube, and there is certain radial velocity, thus heat convection in thermoexcell effectively, improve the coefficient of heat transfer inside heat exchanger tube; Heat exchanger tube outer wall is provided with thermofin, increases the contact area of heat exchanger tube and flame and flue gas, improve the coefficient of heat transfer outside heat exchanger tube, the Composite Walls of heat exchanger tube is improved; Thus improve the exchange capability of heat of heat exchanger tube, make to reduce for reaching heat exchanger tube quantity needed for identical exchange capability of heat, heat-exchanging tube bundle compact conformation, volume are little, lightweight;
(6) in net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention, the helical angle of heat exchanger tube spiral grooves and pitch can adjust easily, change in process, to adapt to different medium, and take into account flow resistance, range of application is wide; Heat exchanger tube is easy to processing in enormous quantities fast, reduces production cost;
(7) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is at heat exchanger tube outside coating radiant heat absorbent layer, improve the ability that heat exchanger tube absorbs flame and gas radiation heat, improve the rate of recovery to firedoor hood flame and fume afterheat;
(8) net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device provided by the invention is coated with insulating on the inwall of this device, the heat of flame and flue gas is suppressed to scatter and disappear through wall conduction, improve radiant heat transfer efficiency in device, make heat exchanger tube absorb more heats, thus improve the rate of recovery to firedoor hood flame and fume afterheat; Meanwhile, the inwall of this device is played a protective role, increases the service life.
In describing the invention, it should be noted that, term " on ", D score, " interior ", etc. instruction orientation or position relationship be based on the orientation under duty of the present invention or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
More than in conjunction with preferred embodiment and the capable example of example to invention has been detailed description.But it is to be understood that, these detailed description of the invention are only to illustrative explanations of the present invention, do not form any restriction to protection scope of the present invention.When not exceeding the present invention's spirit and protection domain, can carry out various improvement, equivalencing or modification to the technology of the present invention content and embodiment thereof, these all fall within the scope of protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. a net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device, it is characterized in that, this device comprises:
Upper heat exchanger components (1), it comprises upper outlet body (11) and is arranged at the inner upper heat-exchanging tube bundle (12) of upper outlet body (11), described upper heat-exchanging tube bundle (12) comprises multiple heat exchanger tube (3), is provided with is attached thereto logical outlet pipe (4) on upper heat-exchanging tube bundle (12) top;
Lower heat exchanger components (2), it comprises lower cover (21) and is arranged at the inner lower heat-exchanging tube bundle (22) of lower cover (21), described lower heat-exchanging tube bundle (22) comprises multiple heat exchanger tube (3), is provided with is attached thereto logical water inlet pipe (5) in lower heat-exchanging tube bundle (22) bottom;
Tube connector (6), it is connected with lower heat-exchanging tube bundle (22) with upper heat-exchanging tube bundle (12) respectively; With circumference pipeline (7), it is tightly connected with upper outlet body (11) and lower cover (21) respectively;
Insulating is coated with in the inside of described net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device.
2. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, multiple heat exchanger tubes (3) on described in heat exchanger components (1) laid out in parallel abreast mutually, be provided with the upper collecting pipe one (121) be communicated with multiple heat exchanger tube (3) respectively in upper heat exchanger components (1) one end, be provided with the lower collecting pipe one (122) be communicated with multiple heat exchanger tube (3) respectively at upper heat exchanger components (1) other end;
Multiple heat exchanger tubes (3) in described lower heat exchanger components (2) laid out in parallel abreast mutually, be provided with the upper collecting pipe two (221) be communicated with multiple heat exchanger tube (3) respectively in lower heat exchanger components (2) one end, be provided with the lower collecting pipe two (222) be communicated with multiple heat exchanger tube (3) respectively at lower heat exchanger components (2) other end.
3. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described heat exchanger tube (3) inwall is provided with spiral grooves (31), heat exchanger tube (3) outer wall is provided with thermofin (32);
The gash depth of described spiral grooves (31) is 0.8 ~ 0.9mm, the groove width of spiral grooves (31) is 0.8 ~ 0.9mm, the groove pitch of spiral grooves (31) is 6 ~ 8mm, and the helical angle of spiral grooves (31) is 25 ~ 28
°;
Described thermofin (32) is spiral fin, and thermofin (32) is made up of aluminium alloy, and the fin thickness of thermofin (32) is 0.5 ~ 1mm.
4. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described insulating comprises high temperature radiating coating material layer.
5. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described heat-insulation and heat-preservation layer thickness is 0.2 ~ 0.5mm.
6. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described insulating is coated on the inwall of upper outlet body (11), circumference pipeline (7) and lower cover (21).
7. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described water inlet pipe (5), lower collecting pipe two (222), lower heat-exchanging tube bundle (22), upper collecting pipe two (221), tube connector (6), lower collecting pipe one (122), upper heat-exchanging tube bundle (12), upper collecting pipe one (121), outlet pipe (4) are communicated with in turn, form the cavity for cooling fluid circulation.
8. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, is characterized in that, the lower cover (21) of described lower heat exchanger components (2) is installed on carburizer firedoor hood flame outside.
9. net belt type laser heating carburizer firedoor hood flame waste heat recovery re-use device according to claim 1, it is characterized in that, described carburizer is provided with the drum washing machine tank (9) for cleaning workpiece, and described outlet pipe (4) is communicated to described drum washing machine tank (9).
10. a net belt type laser heating carburizer firedoor hood flame waste heat recovery reuse method, is characterized in that, the method adopts the device as described in the claims 1 to 9.
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| CN110129718A (en) * | 2019-06-19 | 2019-08-16 | 嘉兴宜鸿贸易有限公司 | Base roller transmission type continuous carbonizing heat treatment furnace |
| CN111057990A (en) * | 2020-01-18 | 2020-04-24 | 象山旭雯钢铁科技有限公司 | Combustion furnace recycling device |
| CN114990470A (en) * | 2022-07-28 | 2022-09-02 | 连云港德友精工科技有限公司 | Surface carburizing treatment equipment for carbon steel tapping screw production |
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| CN104729308B (en) | 2016-07-06 |
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