CN101709921B - System and method thereof for recovering waste heat of cooled piece of heating furnace - Google Patents
System and method thereof for recovering waste heat of cooled piece of heating furnace Download PDFInfo
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- CN101709921B CN101709921B CN2009102581592A CN200910258159A CN101709921B CN 101709921 B CN101709921 B CN 101709921B CN 2009102581592 A CN2009102581592 A CN 2009102581592A CN 200910258159 A CN200910258159 A CN 200910258159A CN 101709921 B CN101709921 B CN 101709921B
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Abstract
The invention relates to a system and a method for recovering waste heat of a cooled piece of a heating furnace. The system comprises at least one heat-consuming device and a cooling component; the heat-consuming device stores cooling water and is provided with a water outlet and a water return port; the cooling component and the cooled piece mutually touch; the cooling component is provided with an input port and an output port; a water outlet line is connected between the water outlet and the input port; a water return line is connected between the return port and the output port; and a circulating pump group is arranged on the water outlet line and is used for pressurizing the cooling water. The invention also provides a method for recovering waste heat of the cooled piece of the heating furnace. The invention has the advantages of recovering the heat of the cooled piece of the heating furnace, realizing energy saving and consumption reduction of the heating furnace, reducing equipment cost and saving water.
Description
Technical field
The present invention relates to a kind of residual neat recovering system and method, relate in particular to a kind of residual neat recovering system and method thereof of cooled piece of heating furnace, rely on the storage water in the thermic devices as low-temperature receiver, absorb the heat of cooled piece of heating furnace, and for the water of higher temperature is provided with thermic devices, reduced the power consumption of heating, reached the purpose of waste heat recovery and utilization with thermic devices.
Background technology
As everyone knows, when in metallurgy industry, using heating furnace steel rolling, the temperature of steel billet in heating furnace up to 1250 ℃～1300 ℃, parts such as the fire door of heating furnace, furnace roof lintel, dress steel pole and discharging rod also have very high temperature simultaneously, for guaranteeing the normal operation of equipment, need cool off above-mentioned parts, the above-mentioned parts that these need cool off also are known as cooled piece.
At present, the mode of utilizing clean recirculated water and above-mentioned cooled piece to carry out heat exchange usually reduces the temperature of above-mentioned cooled piece.Fig. 1 is the structural representation of existing heating furnace cooling system.As shown in Figure 1, this cooling system comprises cooling tower 101, outlet pipeline 102 and water return pipeline 103, and with cooled piece 100 contacted cooling water pipes 104.Wherein, outlet pipeline 102 is connected with the pond 106 of cooling tower 101 bottoms, and water return pipeline 103 is connected with the shower nozzle 105 on cooling tower 101 tops.Like this, cooling tower 101, outlet pipeline 102, cooling water pipe 104, water return pipeline 103 form a closed circuit.Its concrete course of work is as follows:
Be stored in the pond 106 of described cooling tower bottom through cooling tower 101 cooled cooling waters, cooling water is transported to cooling water each cooling water pipe 104 that is arranged in parallel by outlet pipeline 102, cooling water is fed each cooled piece 100 (go out and depress lintel 1004, discharging fire door 1005 and charging fire door 1006 etc. in steel pole 1001, dress steel pole 1002, fire door lintel 1003, the stove), each cooled piece 100 is cooled off.Then, the cooling water that has absorbed the cooled piece heat sprays through the shower nozzle 105 that water return pipeline 103 is delivered to cooling tower 101 tops.In the sprinkling process, the cold air in cooling water and the cooling tower 101 carries out the caloic exchange, and cold air absorbs heat and condensate water is divided the formation damp steam, is diffused in the atmosphere; And cooling water falls into the pond 106 of cooling tower 101 bottoms after being cooled, and is used by water pump 107 pressurized circulation again.
Though said structure can make the cooled piece cooling, has following weak point:
1, owing to after the heat of cooling water absorbs by cold air in cooling tower, directly be discharged in the atmosphere, heat does not obtain recycling, and causes the serious waste of heat resource.
2, owing to combining the formation moist steam with the part of cooling water, the cold air in the cooling tower is discharged in the atmosphere, cause the cooling water loss amount bigger, therefore need constantly to replenish a large amount of water,, cause the waste of water resource to guarantee the use amount of cooling water to cooling system.
3, for satisfying the use amount of cooling water, the pool volume that is arranged on the cooling tower bottom is also bigger, causes equipment investment big, has improved the cost of system.
And existingly need heat with thermic devices, to guarantee the normal operation of equipment.For example existing oxygen-eliminating device is to utilize steam to heat, and therefore needs a large amount of high-temperature steams, needs to expend a large amount of energy and generate high-temperature steam, does not utilize energy-saving and cost-reducing.
For this reason, how can reclaim and utilize the heat of cooled piece of heating furnace, realize the energy-saving and cost-reducing of heating furnace, can reduce equipment cost again, reduce water consumption, become the important technological problems that those skilled in the art are eager to solve.
Summary of the invention
At the problems referred to above, the exhaust heat recovering method that the purpose of this invention is to provide a kind of cooled piece of heating furnace, this method is utilized heat exchange principle, when cooled piece is cooled off, can be to providing hot water with thermic devices, realize the recycling of cooled piece of heating furnace waste heat, and simple in structure, easy to implement.
Another object of the present invention provides a kind of residual neat recovering system of cooled piece of heating furnace, this system is by carrying out heat exchange with the storage water in the thermic devices as the cooling water of heating furnace and the cooled piece of heating furnace, thereby cooled piece is cooled off, and the cooling water after the heat absorption feeds uses thermic devices, to reduce with the used quantity of steam of thermic devices, realize the recycling of cooled piece of heating furnace waste heat, and can reduce equipment cost, minimizing water consumption and energy-output ratio.
For achieving the above object, the present invention proposes a kind of exhaust heat recovering method of cooled piece of heating furnace, described method comprises: at least one is set uses thermic devices, store cooling water described in thermic devices; Cooling component is set, described cooling component is contacted with described cooled piece; Form a closed circuit with described with thermic devices and described cooling component by outlet pipeline and water return pipeline; The circulating pump group is set on described outlet pipeline, makes described cooling water in described closed circuit, flow; Described cooling water carries out heat exchange by described cooling component and described a plurality of cooled piece of heating furnace, and described cooling water absorbs the cooled piece of heating furnace heat, and the cooling water that absorbs behind the heat is flow to described with in the thermic devices by described water return pipeline.
In the present invention, describedly be changed to oxygen-eliminating device and softened water tank with hot charging; One end of described water return pipeline is connected with described softened water tank with described oxygen-eliminating device respectively, and its other end is connected with the delivery outlet of described cooling component; Be provided with overflow valve on the water return pipeline of the water return outlet front end of described softened water tank, described overflow valve is provided with predetermined pressure.
In the present invention, the cooling water behind the absorption heat that is flowed out by the delivery outlet of described cooling component feeds described oxygen-eliminating device by described water return pipeline, and heat recovery is in described oxygen-eliminating device; When the hydraulic pressure of described water return pipeline during greater than this predetermined pressure, described overflow valve is opened, and the cooling water in the described water return pipeline feeds in described oxygen-eliminating device and the softened water tank; When the hydraulic pressure in the described water return pipeline during less than this predetermined pressure, described overflow valve resets and cuts out, and opens circuit between described water return pipeline and the described softened water tank.
In the present invention, described cooling component is made up of a plurality of cooling-parts that are arranged in parallel, and described cooling-part is fed respectively in described each cooled piece, makes cooling water to carry out heat exchange with each cooled piece respectively via each cooling-part.
The present invention also provides a kind of residual neat recovering system of cooled piece of heating furnace, and described system comprises: at least one uses thermic devices, stores cooling water described in thermic devices, offers delivery port and water return outlet described on thermic devices; Cooling component, described cooling component contacts with described a plurality of cooled pieces, is provided with input port and delivery outlet on described cooling component; Outlet pipeline, described outlet pipeline are connected between described delivery port and the described input port; Water return pipeline, described water return pipeline are connected between described water return outlet and the described delivery outlet; The circulating pump group, described circulating pump group is arranged on the described outlet pipeline.
In the present invention, describedly comprise oxygen-eliminating device and softened water tank with thermic devices, described delivery port comprises first delivery port and second delivery port of the bottom that is separately positioned on described oxygen-eliminating device and softened water tank, and described water return outlet comprises first water return outlet and second water return outlet on the top that is separately positioned on described oxygen-eliminating device and softened water tank; Described outlet pipeline one end is connected with second delivery port with described first delivery port respectively, its other end is connected with the input port of described cooling component, described water return pipeline one end is connected with second water return outlet with described first water return outlet respectively, and its other end is connected with the delivery outlet of described cooling component.
In the present invention, on the water return pipeline of the described second water return outlet front end, be provided with overflow valve.
In the present invention, describedly be changed to oxygen-eliminating device with hot charging, described delivery port is first delivery port that is located at described oxygen-eliminating device bottom, described water return outlet is first water return outlet that is located at described oxygen-eliminating device top, and described outlet pipeline is connected between the input port of described first delivery port and described cooling component; Described water return pipeline is connected between the delivery outlet of described first water return outlet and described cooling component.
In the present invention, describedly be changed to softened water tank with hot charging, described delivery port is second delivery port that is located at described softened water tank bottom, described water return outlet is second water return outlet that is located at described softened water tank top, and described outlet pipeline is connected between the input port of described second delivery port and described cooling component; Described water return pipeline is connected between the delivery outlet of described second water return outlet and described cooling component.
In the present invention, described cooling component comprises several cooling-parts that are arranged in parallel, and described cooling-part feeds respectively in described each the cooled piece.
In the present invention, described cooling-part is tube bank, coiled pipe, spiral element or is opened in the groove on the cooled piece or connects the cavity of cooled piece.
In the present invention, described each cooling-part is around its pairing described cooled piece setting.
In the present invention, described each cooling-part is provided with flow measurement device and flow control valve.
In the present invention, described circulating pump group comprises two electric circulating pumps that are arranged in parallel, and further comprises a diesel cycle pump, and described diesel cycle pump and described two electric circulating pumps are arranged in parallel.
With existing structure in comparison, the present invention has following characteristics and advantage:
1, the residual neat recovering system of cooled piece of heating furnace of the present invention and method thereof, utilize with the cooling water of the storage water in the thermic devices as heating furnace, cooling water carries out heat exchange by the cooled piece of cooling component and heating furnace, thereby cooled piece is cooled off, and can be to providing hot water with thermic devices, reduced the steam consumption that is used to add hot water, realized recovery and utilization the cooled piece of heating furnace waste heat; Water resource and steam energy have been saved.
2, because the present invention utilizes traditional oxygen-eliminating device and softened water tank as using thermic devices, and utilize storage water in oxygen-eliminating device and the softened water tank as the cooling water of heating furnace, cooling water feeds cooling component through outlet pipeline, carry out heat exchange with cooled piece, make cooled piece cool off, and heat up in cooling water heat absorption back, the cooling water with higher temperature flows out from cooling component again, feed by water return pipeline and to use thermic devices, with to providing hot water with thermic devices.In above-mentioned waste heat recovery process, only need utilize traditional oxygen-eliminating device and softened water tank can realize the waste heat recovery and the utilization of cooled piece of heating furnace, be discharged in the atmosphere with heat in the cooling water that will utilize in the prior art after cooling tower will absorb heat and compare, the present invention needn't use cooling tower, saved equipment cost, save the floor space of equipment, also avoided a large amount of of cooling water to scatter and disappear simultaneously, saved water resource.
3 and, cooling component of the present invention is made up of several cooling-parts, each cooling-part feeds each cooled piece respectively, after making that cooling water branches to each cooling-part, can carry out heat exchange with each cooled piece fully, the heat exchange efficiency height has improved the waste heat recovery rate of cooled piece of heating furnace.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is the structural representation of existing heating furnace cooling system;
Fig. 2 is the structural representation of the residual neat recovering system embodiment one of cooled piece of heating furnace of the present invention;
Fig. 3 is the structural representation of cooling component of the present invention;
Fig. 4 is the structural representation of circulating pump group of the present invention;
Fig. 5 is the structural representation of the residual neat recovering system embodiment two of cooled piece of heating furnace of the present invention;
Fig. 6 is the structural representation of the residual neat recovering system embodiment three of cooled piece of heating furnace of the present invention;
Fig. 7 is the steps flow chart schematic diagram of the exhaust heat recovering method of cooled piece of heating furnace of the present invention.
Description of reference numerals:
Prior art:
The 100-cooled piece; 1001-goes out steel pole; 1002-adorns steel pole; 1003-fire door lintel; Depress lintel in the 1004-stove; 1005-discharging fire door; The 1006-fire door of feeding; The 101-cooling tower; The 102-outlet pipeline; The 103-water return pipeline; The 104-cooling water pipe; The 105-shower nozzle; The 106-pond; The 107-water pump.
The present invention:
The 1-oxygen-eliminating device; 11-first delivery port; 12-first water return outlet; The 2-softened water tank; 21-second delivery port; 22-second water return outlet; The 3-cooling component; The 31-input port; The 32-delivery outlet; The 33-cooling-part; The 34-flow measurement device; The 35-flow control valve; The 4-outlet pipeline; The 5-water return pipeline; 6-circulating pump group; The 61-electric circulating pump; 62-diesel cycle pump; The 7-cooled piece; 71-goes out steel pole; 72-adorns steel pole; The 73-lintel; 74-discharging fire door; The 75-fire door of feeding.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.Technical scheme of the present invention is the cooling system based on existing cooled piece of heating furnace, utilize with the storage water in the thermic devices (as oxygen-eliminating device, softened water tank etc.) as cooling water, wherein the cooling water in the oxygen-eliminating device can be provided by softened water tank or other waterworks, by forming closed circuit with thermic devices, outlet pipeline, water return pipeline and cooling component, and the circulating pump group is set on outlet pipeline, make described cooling water in described closed circuit, flow.When cooling water flow during through cooling component, utilize heat exchange principle, make cooling water and cooled piece of heating furnace carry out heat exchange.Both can cool off, and heated cooling water can be delivered to again and use thermic devices, it was heated, realize the recycling of cooled piece of heating furnace waste heat cooled piece.Oxygen-eliminating device and/or softened water tank have been adopted with thermic devices in the embodiments of the invention, but technical scheme of the present invention is not limited in oxygen-eliminating device and softened water tank, and those skilled in the art should easier associate also conversion and utilize that other carries out waste heat recovery with thermic devices in the heating furnace a little of technical scheme of the present invention.
Embodiment one
Fig. 2 is the structural representation of the residual neat recovering system embodiment one of cooled piece of heating furnace of the present invention.As shown in Figure 2, the residual neat recovering system of cooled piece of heating furnace of the present invention comprises: the closed circuit of being made up of oxygen-eliminating device 1 and softened water tank 2 and outlet pipeline 4, cooling component 3, water return pipeline 5 and circulating pump group 6.Wherein, in oxygen-eliminating device 1 and softened water tank 2, has storage water respectively.In the present embodiment, this storage water can be used as the cooling water of heating furnace; Cooling water feeds in the cooled piece 7 through cooling component 3, and contacts with the cooled piece 7 of heating furnace, carries out heat exchange by cooling water and the cooled piece 7 that flows through in the cooling component 3.Oxygen-eliminating device 1 and softened water tank 2 are connected with cooling component 3 with water return pipeline 5 by outlet pipeline 4.
As shown in Figure 2, the concrete structure of above-mentioned closed circuit is: offer delivery port and water return outlet respectively on oxygen-eliminating device 1 and softened water tank 2, promptly offer first delivery port 11 that is connected with cooling water in the oxygen-eliminating device 1 in the bottom of oxygen-eliminating device 1, offer first water return outlet 12 on the top of oxygen-eliminating device 1, be used for the cooling water after the heat absorption is introduced oxygen-eliminating device 1; Offer second delivery port 21 that is connected with cooling water in the softened water tank 2 in the bottom of softened water tank 2, offer second water return outlet 22, be used for the cooling water after the heat absorption is introduced softened water tank 2 on the top of softened water tank 2.
Please in the lump referring to Fig. 3, Fig. 3 is the structural representation of cooling component of the present invention.Offer input port 31 and delivery outlet 32 on the cooling component 3, cooling component 3 is made up of several cooling-parts that are arranged in parallel 33, each cooling-part 33 a corresponding input port 31 and delivery outlet 32 makes cooling water can flow into and flow out each cooling-part 33 respectively.Each cooling-part 33 feeds respectively in each corresponding cooled piece 7, and contacts with corresponding each cooled piece 7.Wherein, cooled piece 7 is for going out steel pole 71, dress steel pole 72, lintel 73, discharging fire door 74 and charging fire door 75 in the present embodiment, but cooled piece 7 is not limited only to above-mentioned parts, also can be miscellaneous part or part that the needs of heating furnace are cooled.
Please again referring to Fig. 2, input port 31 at cooling component 3 is connected with first delivery port 11 of oxygen-eliminating device 1 and second delivery port 21 of softened water tank 2 respectively by outlet pipeline 4, make cooling water from oxygen-eliminating device 1 and softened water tank 2, to enter outlet pipeline 4 respectively, enter each cooling-part 33 of cooling component 3 again through outlet pipeline 4, and then in the feeding heating furnace, each cooled piece 7 is cooled off.Correspondingly, the delivery outlet 32 of cooling component 3 is connected with first water return outlet 12 of oxygen-eliminating device 1 and second water return outlet 22 of softened water tank 2 respectively by water return pipeline 5, makes that the cooling water after the heat absorption can flow in oxygen-eliminating device 1 and the softened water tank 2, and it is heated.
Further, cooling-part 33 is provided with around its corresponding cooled piece 7, and cooling-part 33 is for tube bank, coiled pipe, spiral element or be opened in the groove on the cooled piece or run through the cavity etc. of cooled piece.But the shape of cooling-part also is not limited thereto, and the variation that can suit according to the shape and the position of cooled piece is as long as can feed cooling water in the cooling-part, so that cooled piece is cooled off.
In addition, on each cooling-part 33, also be provided with flow measurement device 34 and flow control valve 35.According to heat exchange amount default between cooled piece in the native system and the cooling water, calculate the flow of cooling water, by adjusting the open degree of flow control valve 35, make the measurement flow of flow measurement device 34 equal calculated flow rate.Can control the needed cooling water inflow of cooled piece accurately like this, make cooled piece effectively be cooled off.
And outlet pipeline 4 is provided with circulating pump group 6, is used for the cooling water pressurization, to guarantee the flowing velocity of cooling water in this closed circuit.
Further, see also Fig. 4, be the structural representation of the circulating pump group of the embodiment of the invention one.As shown in the figure, circulating pump group 6 comprises two electric circulating pumps that are arranged in parallel 61, when operate as normal, starts one or two work in the electric circulating pump 61, for cooling water provides enough pressure, to guarantee the flowing velocity of cooling water in closed circuit.Circulating pump group 6 also comprises a diesel cycle pump 62, and this diesel cycle pump 62 is arranged in parallel as spare circulating pump and two electric circulating pumps 61.Have a power failure or electric circulating pump 61 when having an accident when running into, start diesel cycle pump 62, drive the diesel cycle pump operations by diesel-driven generator 63, to guarantee the operating pressure of cooling water as spare circulating pump.
Further, as shown in Figure 2, on water return pipeline 5, be provided with overflow valve 8 near second water return outlet, 22 places of softened water tank 2.Because overflow valve 8 is provided with a predetermined pressure, this predetermined pressure is made as 0.2MPa～0.3MPa usually, make the cooling water in the water return pipeline 5 at first enter in the oxygen-eliminating device 1, when the cistern water level of oxygen-eliminating device is higher than designated water level, open degree by the magnetic valve on the control oxygen-eliminating device, minimizing is entered the cooling water inflow of oxygen-eliminating device by return pipe, pressure in the water return pipeline 5 increases, when pressure exceeds the predetermined pressure of overflow valve 8, overflow valve 8 is opened, and the part in the cooling water is branched in the softened water tank 2 like this, can be the hot water that softened water tank 2 provides higher temperature, avoid the hidden danger that causes owing to cooling water inflow is excessive, the security that has improved system simultaneously.
The operation principle of the present invention and the concrete course of work are, utilize heat exchange principle, storage water in dependence oxygen-eliminating device 1 and the softened water tank 2 enters cooling component 3 as cooling water by outlet pipeline 4, and the cooled piece 7 of the cooling water in cooling component 3 and the high temperature of heating furnace carries out heat exchange.In heat exchanging process, cooling water absorbs the heat of cooled piece, and cooled piece is cooled off; Simultaneously, the temperature of cooling water is increased to 60 ℃～80 ℃, flow in oxygen-eliminating device and the softened water tank via water return pipeline again and be used, oxygen-eliminating device and softened water tank can utilize the cooling water of high temperature to carry out the operation of deoxygenation and demineralized water in the course of the work, this technology is comparatively common in the art, does not repeat them here.Cooling water heating after the heat absorption flows in the outlet pipeline by circulating pump, with recycling once more with being stored in after the thermic devices in oxygen-eliminating device and the softened water tank.
Owing to adopt said structure, the present invention utilizes the storage water in oxygen-eliminating device and the softened water tank to carry out heat exchange as the cooling water and the cooled piece of heating furnace, can cool off cooled piece, reduced the cooling load of cooling tower, and utilize oxygen-eliminating device and softened water tank commonly used in the furnace apparatus to provide cooling water for heating furnace, need not increase equipment, reduced equipment investment.Simultaneously, cooling water among the present invention is through after the heat exchange, can provide hot water for oxygen-eliminating device and softened water tank, realized the waste heat recovery of heating furnace and energy-saving and cost-reducing.
Embodiment two
Please refer to Fig. 5, be the structural representation of the embodiment of the invention two.Identical with embodiment one in the present embodiment parts adopt identical label.
As shown in Figure 5, the residual neat recovering system of cooled piece of heating furnace of the present invention comprises the closed circuit of being made up of oxygen-eliminating device 1, outlet pipeline 4, cooling component 3 and water return pipeline 5.Wherein, oxygen-eliminating device 1 is for to use thermic devices, and the storage water in the oxygen-eliminating device 1 is as cooling water, and concrete structure is: the bottom of oxygen-eliminating device 1 is provided with first delivery port 11, the top of oxygen-eliminating device 1 is provided with first water return outlet 12, and outlet pipeline 4 is connected between the input port 31 of first delivery port 11 and cooling component 3; Water return pipeline 5 is connected between the delivery outlet 32 of described first water return outlet 12 and described cooling component 3.Like this, the cooling water of oxygen-eliminating device 1 flows in above-mentioned closed circuit, and cooling water carries out heat exchange by cooling component 3 and cooled piece, realizes the waste heat recovery and the utilization of cooled piece of heating furnace.
Other structures, operation principle and the beneficial effect of present embodiment are identical with embodiment one, do not repeat them here.
Embodiment three
Please refer to Fig. 6, be the structural representation of the embodiment of the invention three.Identical with embodiment one in the present embodiment parts adopt identical label.
As shown in Figure 6, the residual neat recovering system of cooled piece of heating furnace of the present invention comprises the closed circuit of being made up of softened water tank 2, outlet pipeline 4, cooling component 3 and water return pipeline 5.Wherein, softened water tank 2 is for using thermic devices, storage water in the softened water tank 2 is as cooling water, concrete structure is: the bottom of softened water tank 2 is provided with second delivery port 21, the top of softened water tank 2 is provided with second water return outlet 22, and outlet pipeline 4 is connected between the input port 31 of described second delivery port 21 and described cooling component 3; Water return pipeline 5 is connected between the delivery outlet 32 of described second water return outlet 22 and described cooling component 3.Like this, the cooling water of softened water tank 2 bottoms enters outlet pipeline 4 by second delivery port 21, input port 31 via outlet pipeline 4 and cooling component 3 enters cooling component 3, and the delivery outlet 32 by cooling component 3 enters water return pipeline 5 again, carries in the softened water tank 2 by water return pipeline 5.Cooling water carries out heat exchange by cooling component and cooled piece, realizes the waste heat recovery and the utilization of cooled piece of heating furnace.
Other structures, operation principle and the beneficial effect of present embodiment are identical with embodiment one, do not repeat them here.
Please refer to Fig. 7, be the exhaust heat recovering method steps flow chart schematic diagram of cooled piece of heating furnace of the present invention, as shown in Figure 7, the exhaust heat recovering method of cooled piece of heating furnace of the present invention comprises:
At first, at least one is set uses thermic devices, store cooling water in thermic devices described;
Secondly, cooling component is set, described cooling component is contacted with described cooled piece;
Once more, form a closed circuit with described with thermic devices and described cooling component by outlet pipeline and water return pipeline; The circulating pump group is set on described outlet pipeline,, makes described cooling water in described closed circuit, flow with to the cooling water pressurization;
Described cooling water carries out heat exchange by described cooling component and described a plurality of cooled piece of heating furnace, cooling water absorbs the cooled piece of heating furnace heat, cooled piece of heating furnace is cooled off, and the cooling water behind the absorption heat, its temperature can rise to 60 ℃～80 ℃, and flow to by described water return pipeline described with in the thermic devices, with to providing hot water with thermic devices.Like this, carry out heat exchange,, be used and be transferred in the reuse thermic devices through the cooling water after the heat absorption with cooled piece cooling by cooling water and cooled piece.
Wherein, comprise oxygen-eliminating device and softened water tank, an end of described water return pipeline be connected with described softened water tank with described oxygen-eliminating device respectively that its other end is connected with the delivery outlet of described cooling component with thermic devices; Be provided with overflow valve on the water return pipeline of the water return outlet front end of described softened water tank, described overflow valve is provided with predetermined pressure, and this predetermined pressure is made as 0.2MPa～0.3MPa usually; Cooling water behind the absorption heat that is flowed out by the delivery outlet of described cooling component feeds described oxygen-eliminating device by described water return pipeline, to heat described oxygen-eliminating device; When the cistern water level of oxygen-eliminating device is higher than designated water level, open degree by the magnetic valve on the control oxygen-eliminating device, minimizing is entered the cooling water inflow of oxygen-eliminating device by return pipe, the hydraulic pressure of described water return pipeline also increases thereupon, when the hydraulic pressure in the described water return pipeline during greater than this predetermined pressure, described overflow valve is opened, and the cooling water in the described water return pipeline feeds in described oxygen-eliminating device and the softened water tank, to heat described oxygen-eliminating device and softened water tank; When the hydraulic pressure in the described water return pipeline during less than this predetermined pressure, described overflow valve resets and cuts out, and opens circuit between described water return pipeline and the described softened water tank.
Further, described cooling component is made up of a plurality of cooling-parts that are arranged in parallel, described cooling-part is fed respectively in corresponding described each cooled piece, make cooling water to carry out heat exchange with each cooled piece respectively via each cooling-part.
In the present invention, the above-mentioned a kind of conduct thermic devices that also can only use in oxygen-eliminating device or the softened water tank, form closed circuit with thermic devices by outlet pipeline and water return pipeline and cooling component, utilize and carry out heat exchange, realize the waste heat recovery and the utilization of cooled piece of heating furnace with cooling water in the thermic devices and cooled piece of heating furnace.
The above only is the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (11)
1. the exhaust heat recovering method of a cooled piece of heating furnace, described method comprises:
At least one is set uses thermic devices, store cooling water in thermic devices described;
Cooling component is set, described cooling component is contacted with described cooled piece;
Form a closed circuit with described with thermic devices and described cooling component by outlet pipeline and water return pipeline; The circulating pump group is set on described outlet pipeline, makes described cooling water in described closed circuit, flow;
Described cooling water carries out heat exchange by described cooling component and a plurality of described cooled piece of heating furnace, and described cooling water absorbs the cooled piece of heating furnace heat, and the cooling water that absorbs behind the heat is flow to described with in the thermic devices by described water return pipeline; It is characterized in that,
Describedly be changed to oxygen-eliminating device and softened water tank with hot charging;
One end of described water return pipeline is connected with described softened water tank with described oxygen-eliminating device respectively, and its other end is connected with the delivery outlet of described cooling component;
Be provided with overflow valve on the water return pipeline of the water return outlet front end of described softened water tank, described overflow valve is provided with predetermined pressure.
2. the exhaust heat recovering method of cooled piece of heating furnace according to claim 1, it is characterized in that, cooling water behind the absorption heat that is flowed out by the delivery outlet of described cooling component feeds described oxygen-eliminating device by described water return pipeline, makes heat recovery in described oxygen-eliminating device; When the hydraulic pressure of described water return pipeline during greater than this predetermined pressure, described overflow valve is opened, and the cooling water in the described water return pipeline feeds in described oxygen-eliminating device and the softened water tank; When the hydraulic pressure in the described water return pipeline during less than this predetermined pressure, described overflow valve resets and cuts out, and opens circuit between described water return pipeline and the described softened water tank.
3. the exhaust heat recovering method of cooled piece of heating furnace according to claim 1 and 2, it is characterized in that, described cooling component is made up of a plurality of cooling-parts that are arranged in parallel, described cooling-part is fed respectively in described each cooled piece, make cooling water to carry out heat exchange with each cooled piece respectively via each cooling-part.
4. the residual neat recovering system of a cooled piece of heating furnace, described system comprises:
At least one uses thermic devices, stores cooling water described in thermic devices, offers delivery port and water return outlet described on thermic devices;
Cooling component, described cooling component contacts with a plurality of described cooled piece of heating furnace, is provided with input port and delivery outlet on described cooling component;
Outlet pipeline, described outlet pipeline are connected between described delivery port and the described input port;
Water return pipeline, described water return pipeline are connected between described water return outlet and the described delivery outlet;
The circulating pump group, described circulating pump group is arranged on the described outlet pipeline;
It is characterized in that, describedly comprise oxygen-eliminating device and softened water tank with thermic devices, described delivery port comprises first delivery port and second delivery port of the bottom that is separately positioned on described oxygen-eliminating device and softened water tank, and described water return outlet comprises first water return outlet and second water return outlet on the top that is separately positioned on described oxygen-eliminating device and softened water tank; Described outlet pipeline one end is connected with second delivery port with described first delivery port respectively, its other end is connected with the input port of described cooling component, described water return pipeline one end is connected with second water return outlet with described first water return outlet respectively, and its other end is connected with the delivery outlet of described cooling component.
5. the residual neat recovering system of cooled piece of heating furnace according to claim 4 is characterized in that, is provided with overflow valve on the water return pipeline of the described second water return outlet front end.
6. according to the residual neat recovering system of claim 4 or 5 described cooled piece of heating furnace, it is characterized in that described cooling component comprises several cooling-parts that are arranged in parallel, described cooling-part feeds respectively in described each the cooled piece.
7. the residual neat recovering system of cooled piece of heating furnace according to claim 6 is characterized in that, described each cooling-part is around its pairing described cooled piece setting.
8. the residual neat recovering system of cooled piece of heating furnace according to claim 6 is characterized in that, described cooling-part is tube bank, coiled pipe, spiral element or is opened in the groove on the cooled piece or connects the cavity of cooled piece.
9. the residual neat recovering system of cooled piece of heating furnace according to claim 7 is characterized in that, described cooling-part is tube bank, coiled pipe, spiral element or is opened in the groove on the cooled piece or connects the cavity of cooled piece.
10. the residual neat recovering system of cooled piece of heating furnace according to claim 6 is characterized in that, described each cooling-part is provided with flow measurement device and flow control valve.
11. residual neat recovering system according to claim 4 or 5 described cooled piece of heating furnace, it is characterized in that, described circulating pump group comprises two electric circulating pumps that are arranged in parallel, further comprise a diesel cycle pump, described diesel cycle pump and described two electric circulating pumps are arranged in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102581592A CN101709921B (en) | 2009-12-21 | 2009-12-21 | System and method thereof for recovering waste heat of cooled piece of heating furnace |
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| CN2009102581592A CN101709921B (en) | 2009-12-21 | 2009-12-21 | System and method thereof for recovering waste heat of cooled piece of heating furnace |
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| CN101709921A CN101709921A (en) | 2010-05-19 |
| CN101709921B true CN101709921B (en) | 2011-07-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102717500B (en) * | 2012-06-15 | 2015-09-16 | 常州万家乐塑料有限公司 | Injection workshop cooling water recirculation system |
| CN103591811B (en) * | 2013-11-25 | 2015-04-15 | 河北钢铁股份有限公司邯郸分公司 | Steel rolling heating furnace wet saturated steam micro overheating processing device and using method thereof |
| CN107381694B (en) * | 2017-09-19 | 2020-10-09 | 四川大学 | Low-temperature multi-effect distillation seawater desalination device |
| CN107937692A (en) * | 2017-10-27 | 2018-04-20 | 马鞍山祥源机械厂 | One kind conveying wire type annealing device |
| CN110398116A (en) * | 2019-07-15 | 2019-11-01 | 世源科技工程有限公司 | A kind of equipment cooling water circulation system |
| CN114672625B (en) * | 2022-04-22 | 2023-12-12 | 瓦房店环通机床附件有限公司 | Energy-saving energy-storage environment-friendly heat treatment salt bath furnace |
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