CN209246701U - Ring cold machine and its heat dissipation recycling component, oxide pellet Preparation equipment - Google Patents
Ring cold machine and its heat dissipation recycling component, oxide pellet Preparation equipment Download PDFInfo
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- CN209246701U CN209246701U CN201821415331.1U CN201821415331U CN209246701U CN 209246701 U CN209246701 U CN 209246701U CN 201821415331 U CN201821415331 U CN 201821415331U CN 209246701 U CN209246701 U CN 209246701U
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000004064 recycling Methods 0.000 title abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 133
- 239000007788 liquid Substances 0.000 claims description 45
- 239000007789 gas Substances 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 14
- 239000002918 waste heat Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 230000011218 segmentation Effects 0.000 abstract 1
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
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- 239000003546 flue gas Substances 0.000 description 5
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- 238000001035 drying Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
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- 230000003647 oxidation Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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Abstract
The utility model relates to ring cold machine technical fields, provide ring cold machine and its heat dissipation recycling component, oxide pellet Preparation equipment.Wherein, ring cold machine heat dissipation recycling component includes the recovery tubes being arranged at the hopper of ring cold machine, and the recovery tubes include that at least one is used to be passed through the entrance of heat exchange medium and multiple for exporting the outlet of heat exchange medium；Multiple outlets are set gradually along the circulating direction of the heat exchange medium.Recovery tubes can recycle the heat dissipation capacity of hopper, achieve the purpose that make whole production line energy-saving with this.And ground reduces operation temperature by ring cold machine, so that operative employee's labor intensity is declined.Furthermore, it is set gradually since there are the outlets of multiple heat exchange mediums along the circulating direction of heat exchange medium, realize the automatic paragraphing outflow of heat exchange medium, segmentation can be required to draw heat exchange medium according to the temperature and plant area that heat exchange medium heats in recovery tubes, further enhance heat utilization ratio.
Description
Technical Field
The utility model relates to a cold machine technical field of ring especially relates to cold machine of ring and heat dissipation recovery subassembly, oxidation pellet preparation equipment thereof.
Background
Oxidized pellets are one of the important methods for agglomeration of fine ores. The fine ore powder is dried in a drying kiln, then is rolled to proper strength, and then is added with proper amount of water and a bonding agent in a pelletizer to prepare green pellets with uniform viscosity and enough strength. The green pellets are preheated and then roasted in an oxidizing atmosphere to agglomerate the green pellets and carry out chemical reaction so as to prepare pellet ore. The oxidized pellet process is particularly suitable for treating fine ore concentrate powder. The produced pellet ore has better cold strength, reducibility and granularity composition. Pellet ore is an important blast furnace burden in the iron and steel industry, can be matched with sintered ore to form a better burden structure, and is widely used in various large iron and steel enterprises.
The production of oxidized pellet ore includes three processes of vertical furnace, chain-returning-ring and belt type roasting machine, in which the chain-returning-ring process is the one which is the most widely used in China and occupies the highest market amount. The process flow is shown in figure 1: the green pellets produced from the pelletizing disc are uniformly distributed on a chain grate trolley through a pellet distribution device 1, enter a rotary kiln 3 after passing through drying, preheating and other sections of a chain grate 2, are roasted at high temperature in the rotary kiln 3 to form finished pellets, then enter an annular cooler 4, finally become normal-temperature finished pellets and are sent to a finished product bin. The rotary kiln 3 is used as a core device in the chain-return-ring process, and has the function of roasting the pellets from the chain grate at high temperature through the high-temperature oxidizing atmosphere in the kiln to complete a series of chemical reactions so as to obtain qualified finished pellets required by blast furnace iron making. The structure of the receiving hopper device of the ring cooling machine is shown in figure 17, the receiving hopper is of a necking special-shaped structure, one end of the receiving hopper is sealed with a rotary horizontal plane of the ring cooling machine by adopting a water sealing technology, the other end of the receiving hopper is connected with a discharging opening of a kiln head box of the rotary kiln, and the receiving hopper device is used for receiving and introducing high-temperature pellet materials roasted in the rotary kiln into the ring cooling machine to perform the next cooling procedure.
In the prior art, the ring cooling machine has the following two defects in the production process due to the lack of means for effectively recycling the wall radiant heat:
firstly, the heat dissipation capacity is not effectively recycled: because the radiation heat of the wall surface of the receiving hopper in the production process is not well and effectively utilized, a large amount of heat is discharged to the atmosphere around the tail of the machine. According to the field production data, the wall temperature of the receiving hopper is generally between 250 and 300 ℃, and the total heat dissipation capacity of the receiving hopper in one year is about 22x10 by taking a 120 ten thousand ton/year oxidized pellet production line as an example9kcal, equivalent to 3143 tons of standard coal. The part of heat can be efficiently utilized, and the energy-saving index of the oxidized pellet system is greatly improved.
Secondly, the operation environment beside the receiving hopper is poor: because the radiation heat dissipation capacity of the wall surface of the receiving hopper is not effectively utilized, the operation environment beside the receiving hopper is very hot, particularly in summer, the highest temperature beside the receiving hopper can reach 60-70 ℃, the labor load of operators is greatly increased, and the potential safety hazard during production operation is increased.
Aiming at the two defects, the existing ring cooling machine device is optimized and improved on the basis of the system, and the receiving hopper device of the ring cooling machine with good waste heat recovery effect and good operation environment beside the machine is developed in an attempt, so that the aims of saving energy and reducing consumption of the whole oxidized pellet production line are fulfilled.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
One of the purposes of the utility model is that: the utility model provides a cold machine of ring and heat dissipation recovery subassembly thereof solves the cold quick-witted heat dissipation capacity of ring that exists among the prior art and does not obtain effective recycle and the other operational environment of cold machine of ring poor technical problem.
In order to achieve the purpose, the utility model provides a heat dissipation and recovery assembly of a circular cooler, which comprises a heat recovery pipe arranged at a receiving hopper of the circular cooler, wherein the heat recovery pipe comprises at least one inlet for introducing a heat exchange medium and a plurality of outlets for outputting the heat exchange medium; the plurality of outlets are arranged in sequence along the circulation direction of the heat exchange medium.
The utility model discloses a cold machine of ring and subassembly is retrieved in heat dissipation thereof, because it is including setting up the heat recovery pipe in hopper department, and then can retrieve the heat dissipation capacity of hopper to this reaches the purpose that makes whole production line energy saving and consumption reduction. Meanwhile, the waste heat beside the receiving hopper is recovered, so that the operation temperature beside the circular cooler is greatly reduced, the labor intensity of operators is reduced, and the operation environment beside the circular cooler is improved. In addition, because the outlets of the plurality of heat exchange media are sequentially arranged along the flowing direction of the heat exchange media, the intelligent segmented outflow of the heat exchange media is realized, the heat exchange media can be led out in a segmented manner according to the heating temperature of the heat exchange media in the heat recovery pipe and the requirements of a factory, and the heat utilization rate is further enhanced.
Preferably, the outlet located furthest downstream communicates with the inlet.
Preferably, a check valve for preventing the heat exchange medium from flowing from the inlet to the most downstream outlet is provided between the most downstream outlet and the inlet.
Preferably, the heat exchange medium is liquid, and a circulating pump is arranged between the most downstream outlet and the inlet;
or,
the heat exchange medium is gas, and a circulating fan is arranged between the outlet and the inlet of the most downstream.
Preferably, the remaining outlets, except the most downstream outlet, are used for connecting a waste heat boiler; the inlet is for connection to a plant main.
Preferably, a plurality of the outlets are respectively provided with a temperature detection element and a control valve, the temperature detection element is used for detecting the temperature of the heat exchange medium flowing through or about to flow through the current outlet, and the control valve satisfies the following conditions: when the temperature of the heat exchange medium reaches a set temperature value, the control valve controls the current outlet to be opened, and the heat exchange medium flows out of the heat recovery pipe through the current outlet; when the temperature of the heat exchange medium does not reach the set temperature value, the control valve controls the current outlet to be closed, and the heat exchange medium is enabled to continuously flow along the heat recovery pipe.
Preferably, the heat recovery pipe is a spiral pipe wound along an outer wall of the receiving hopper.
Preferably, the spiral pipe is provided with heat transfer fins.
The utility model discloses another purpose is: the utility model provides a cold machine of ring, including receiving hopper and the cold quick-witted heat dissipation of above-mentioned ring recovery subassembly.
The utility model discloses a cold machine of ring through the cold quick-witted heat recovery subassembly of ring above using, can effectively strengthen the complementary energy utilization ratio of the cold machine of ring, reduces the energy consumption index of the cold machine of ring, reduces the other ambient temperature of the cold machine of ring, improves the other operation environment of the cold machine of ring. Compared with the ring cooling machine in the prior art, the ring cooling machine of the embodiment is more energy-saving, economic, reliable and environment-friendly, and can be expected to have huge development potential in the future market. In addition, the circular cooler of the embodiment can output the heat exchange medium through a plurality of different outlets, so that the heat recovery efficiency can be improved.
The utility model discloses another purpose is: the utility model provides an oxidation pellet preparation facilities, including cloth ball device, chain grate, rotary kiln and the cold machine of ring that sets gradually, the cold machine of ring is the cold machine of above-mentioned ring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic process flow diagram of a prior art chain-loop process;
FIG. 2 is a schematic view of a rotary kiln according to the prior art;
FIG. 3 is a schematic view of the structure in the direction A of FIG. 2;
FIG. 4 is a schematic view of an embodiment of a rotary kiln heat recovery assembly;
FIG. 5 is a schematic view of the structure of FIG. 4 in the direction C;
FIG. 6 is a schematic view of the structure in the direction B in FIG. 4;
FIG. 7 is a schematic view of the working flow of the heat recovery assembly of the rotary kiln in the embodiment;
FIG. 8 is a schematic view (one) of the installation of a rotary kiln heat recovery assembly provided with heat transfer ribs;
FIG. 9 is a schematic view of the installation of a heat recovery assembly for a rotary kiln having heat transfer ribs;
FIG. 10 is a schematic view of a prior art grate;
FIG. 11 is a schematic view of an embodiment of a grate heat recovery assembly installed;
FIG. 12 is a schematic structural view of a grate heat recovery assembly of an embodiment;
FIG. 13 is a schematic structural view (one) of a grate heat recovery assembly provided with heat transfer ribs;
FIG. 14 is a schematic structural view of a grate heat recovery assembly with heat transfer ribs (II);
FIG. 15 is a schematic view (one) of the installation of the grate heat recovery assembly including multiple layers of serpentine tubes;
FIG. 16 is a schematic view of the installation of the grate heat recovery assembly including multiple layers of serpentine tubes;
FIG. 17 is a schematic diagram of a prior art ring cooler;
FIG. 18 is an installation schematic diagram of a heat rejection recovery assembly of the ring cooler of the embodiment;
FIG. 19 is a perspective view of a spiral tube provided with heat transfer ribs;
FIG. 20 is a schematic perspective view of a spiral pipe provided with heat transfer ribs (II);
FIG. 21 is a cross-sectional view of a spiral tube provided with heat transfer ribs;
FIG. 22 is a cross-sectional view of a spiral tube provided with heat transfer ribs (II);
FIG. 23 is a schematic cross-sectional view (III) of a spiral tube provided with heat transfer ribs;
FIG. 24 is a schematic flow chart of the operation of the heat recovery assembly of the ring cooler in the embodiment;
in the figure: 1. a ball distributing device; 2. a chain grate machine; 3. a rotary kiln; 31. a kiln body; 32. a carrier roller; 33. a load-bearing base; 4. a circular cooler; 401. a receiving hopper; 5. a rotary kiln heat dissipation recovery assembly; 51. a spiral tube; 52. an inlet; 53. a gas/liquid inlet pipe; 54. an outlet; 541. a first gas/liquid outlet; 542. a second gas/liquid outlet; 543. a third gas/liquid outlet; 544. a fourth gas/liquid outlet; 545. a fifth gas/liquid outlet; 55. an air/liquid outlet pipe; 551. a first outlet/inlet pipe; 552. a second outlet/inlet pipe; 553. a third outlet/inlet pipe; 554. a fourth gas/liquid outlet pipe; 555. a fifth gas/liquid outlet pipe; 56. a control valve; 561. a first control valve; 562. a second control valve; 563. a third control valve; 564. a fourth control valve; 565. a fifth control valve; 566. a sixth control valve; 6. a circulating fan/circulating pump; 7. a check valve; 8. heat transfer fins; 9. a temperature detection element; 05. a chain grate heat dissipation recovery assembly; 051. a serpentine tube; 21. a hood; 22. a trolley; 23. a head pulley; 24. a tail wheel.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship, without particular description, based on the orientation or positional relationship shown in the drawings, only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 18, the heat dissipation and recovery assembly of the ring cooler in the present embodiment includes a heat recovery pipe disposed at the receiving hopper 401 of the ring cooler, where the heat recovery pipe includes at least one inlet for introducing a heat exchange medium and a plurality of outlets for outputting the heat exchange medium; the plurality of outlets are arranged in sequence along the circulation direction of the heat exchange medium.
The heat dissipation recovery assembly of the circular cooler in the embodiment comprises the heat recovery pipe arranged at the receiving hopper 401, so that the heat dissipation amount of the receiving hopper 401 can be recovered, and the purpose of saving energy and reducing consumption of the whole production line is achieved. Meanwhile, the waste heat beside the receiving hopper 401 is recovered, so that the operation temperature beside the circular cooler is greatly reduced, the labor intensity of operators is reduced, and the operation environment beside the circular cooler is improved. In addition, because the outlets of the plurality of heat exchange media are sequentially arranged along the flowing direction of the heat exchange media, the intelligent segmented outflow of the heat exchange media is realized, the heat exchange media can be led out in a segmented manner according to the heating temperature of the heat exchange media in the heat recovery pipe and the requirements of a factory, and the heat utilization rate is further enhanced.
Wherein the outlet, preferably but not necessarily located furthest downstream, communicates with the inlet 52, thereby forming a circulation loop between the outlet furthest downstream and the inlet 52. Of course, the most downstream outlet and the inlet 52 may be connected by a pipe to form a circulation loop, and any other method may be adopted as long as the heat exchange medium can flow back to the inlet 52 through the most downstream outlet. Furthermore, in the heat recovery pipe of the heat recovery assembly of the circular cooler of the embodiment, when the temperature of the heat exchange medium at the outlet at the most downstream is not measured to reach the set temperature value, the heat exchange medium can be introduced into the heat recovery pipe through the inlet 52 again through the outlet at the most downstream. Under the condition, the heat recovery capacity of the heat exchange medium can be fully utilized by the heat dissipation recovery assembly of the circular cooler, and the heat exchange medium is fully utilized.
Wherein the "most downstream outlet" is also: the heat exchange medium is fed from the inlet 52 and flows along the heat recovery tubes, wherein the outlet through which the heat exchange medium finally passes is the most downstream outlet.
Further, a check valve for preventing the heat exchange medium from flowing from the inlet 52 to the most downstream outlet, that is, preventing the heat exchange medium on the circulation circuit from flowing reversely is provided on the circulation circuit between the most downstream outlet to the inlet 52.
In this embodiment, the specific type of the heat exchange medium is not limited, as long as the heat exchange medium can exchange heat with the receiving hopper 401 of the circular cooler to achieve heat recovery.
In either case, the heat exchange medium is a liquid, for example, water, which is readily available and inexpensive, may be used as the heat exchange medium, and oil may be used as the heat exchange medium. In this case, a circulation pump may be provided between the most downstream outlet and the inlet 52. Of course the circulation pump may also be arranged at other locations.
In another case, the heat exchange medium is a gas. In this case, a circulation fan is provided between the most downstream outlet and the inlet 52. Similarly, the circulating fan may be disposed at other positions.
In this embodiment, the remaining outlets, except for the most downstream outlet, may be connected to a waste heat boiler and the inlet 52 may be connected to a plant floor manifold. In this case, the heat dissipation and recovery assembly of the circular cooler utilizes facilities in a plant area to provide heat exchange media and recover heat, so that the existing facilities can be fully utilized, and the manufacturing cost is saved.
Referring to fig. 18, each outlet is provided with a temperature detecting element 9 and a control valve, respectively. Wherein the temperature detecting element 9 is used for detecting the temperature of the heat exchange medium flowing or about to flow through the current outlet. The control valve satisfies: when the measured temperature of the heat exchange medium reaches the set temperature value, the control valve controls the opening of the current outlet and enables the heat exchange medium to flow out of the heat recovery pipe through the current outlet. When the temperature of the heat exchange medium does not reach the set temperature value, the control valve controls the current outlet to be closed, and the heat exchange medium is enabled to continuously flow along the heat recovery pipe. Wherein, for the most downstream outlet, when the temperature of the heat exchange medium does not reach the set temperature value, the heat exchange medium flows into the heat recovery pipe again through the inlet 52.
In fig. 18, the number of outlets is five, that is, the first gas/liquid outlet 541, the second gas/liquid outlet 542, the third gas/liquid outlet 543, the fourth gas/liquid outlet 544 and the fifth gas/liquid outlet 545, and the number of inlets 52 is one. In fig. 18, the first outlet/fluid port 541 is connected to the first outlet/fluid pipe 551, the second outlet/fluid port 542 is connected to the second outlet/fluid pipe 552, the third outlet/fluid port 543 is connected to the third outlet/fluid pipe 553, the fourth outlet/fluid port 544 is connected to the fourth outlet/fluid pipe 554, the fifth outlet/fluid port 545 is connected to the fifth outlet/fluid pipe 555, and the inlet 52 is connected to the inlet/fluid pipe 53. First, second, third, fourth and sixth control valves 561, 562, 563, 564 and 566 are provided on the first to fifth outlet/liquid pipes 551 to 555, respectively, and the temperature detection element 9, and a fifth control valve 565 is provided on the inlet/liquid pipe 53. Wherein, the first gas/liquid outlet pipe 551 to the fourth gas/liquid outlet pipe 554 are connected to a high-temperature flue gas pipe or a steam pipe of the plant area, and the fifth gas/liquid outlet pipe 555 is connected to the gas/liquid inlet pipe 53 through a circulation loop.
Of course, the number of outlets and inlets 52 is not limited by the examples herein.
In this embodiment, the heat recovery tubes are preferably, but not necessarily, helical tubes 51 coiled along the receiving hopper 401, see fig. 18. In this case, the spiral pipe 51 and the outer surface of the receiving hopper 401 are sufficiently contacted, and heat recovery can be more effectively achieved. And the heat exchange medium makes spiral motion around the receiving hopper 401 along the spiral pipe 51, and becomes a high-temperature medium with the receiving hopper 401 through radiation heat exchange in real time, so that the heat dissipation of the receiving hopper 401 of the ring cooling machine is more effectively utilized.
Wherein, the spiral pipe 51 may be provided with heat transfer fins 8 to enhance the radiation type heat dissipation and recycling effect of the spiral pipe 51. The specific form of the heat transfer rib 8 is not limited, and fig. 19 to 23 of the present embodiment show various structural forms of the heat transfer rib, respectively. The heat transfer fins may be in the form of spiral mounting structure shown in fig. 19, or in the form of split mounting structure shown in fig. 20, or in any other form, which should be included in the scope of the present invention. In addition, the cross-sectional area of the heat transfer ribs may be circular in fig. 21, square in fig. 22, or triangular in fig. 23, and is not limited thereto by way of example.
In this embodiment, the cross-sectional area of the heat recovery pipe of the heat recovery assembly for the circular cooler is not limited, and preferably, but not necessarily, the cross-sectional area of the heat recovery pipe is circular or rectangular.
Taking the circular cooler heat dissipation recovery assembly with five outlets and one inlet 52 as an example, when the circular cooler heat dissipation recovery assembly is applied to heat recovery, please refer to fig. 24: the normal temperature air or the normal temperature water firstly enters the spiral pipe 51 through the air/liquid inlet pipe 53 and the inlet 52, then moves along the spiral pipe 51, absorbs the heat dissipation amount emitted from the outer wall of the receiving hopper 401 through radiation heat exchange, and finally becomes high temperature air or high temperature water vapor to be discharged from the outlet. The temperature detection element 9 monitors the temperatures T1, T2, T3, T4, and T5 of the heat exchange medium at the five outlets in real time. If the temperature T1 of the heat exchange medium at the first outlet (the first outlet counted along the medium flowing direction) has reached the required plant temperature, the control valves at the remaining four outlets do not need to operate, and only the first control valve 561 at the first outlet needs to be opened to lead the heat exchange medium out of the first outlet. Similarly, if the temperature T2 or T3 can reach the required temperature of the plant, the second control valve 562 or the third control valve 563 is opened correspondingly, and the other control valves are closed, so as to lead the high-temperature heat exchange medium out of the corresponding outlets.
If T5 has not yet reached the plant requirements, indicating that the heat exchange medium needs to be subjected to another heat exchange, the sixth control valve 566 is opened to introduce the heat exchange medium back to the inlet 52 through the circulation loop again for a new round of circulating heat exchange until the plant requirements are reached. In the process, the circulating fan/circulating pump can be started, the heat exchange medium is introduced into the gas/liquid inlet pipe 53 again through the circulating loop, and a new round of circulating heat exchange is carried out until the requirement of a plant area is met.
Alternatively, the heat exchange medium can also be led directly through the present outlet, provided that T5 has not yet reached the plant requirements.
In addition, it is found from fig. 18 that the circular cooler sequentially includes a first circular cooling section, a second circular cooling section and a third circular cooling section from right to left, and the arrow direction from top to bottom in fig. 18 indicates the blanking direction of the high-temperature pellet material from the rotary kiln.
Further, the embodiment further provides a ring cooling machine, which includes a receiving hopper 401 and the heat dissipation and recovery assembly of the ring cooling machine.
The cold machine of ring of this embodiment, through the cold quick-witted heat recovery subassembly of ring more than using, can effectively strengthen the complementary energy utilization ratio of the cold machine of ring, reduce the energy consumption index of the cold machine of ring, reduce the other ambient temperature of the cold machine of ring, improve the other operation environment of the cold machine of ring. Compared with the ring cooling machine in the prior art, the ring cooling machine of the embodiment is more energy-saving, economic, reliable and environment-friendly, and can be expected to have huge development potential in the future market. In addition, the circular cooler of the embodiment can output the heat exchange medium through a plurality of different outlets, so that the heat recovery efficiency can be improved.
Further, the embodiment also provides a heat dissipation recovery method of a circular cooler, wherein a heat recovery pipe is arranged at the receiving hopper 401 of the circular cooler, and at least one inlet and a plurality of outlets are sequentially arranged on the heat recovery pipe along the flowing direction of a heat exchange medium; the method comprises the following steps:
introducing a heat exchange medium into the heat recovery pipe, so that the heat exchange medium and the receiving hopper 401 exchange heat and the temperature is increased;
detecting the temperature of the heat exchange medium at each outlet:
for other outlets except the most downstream outlet, when the temperature of the heat exchange medium reaches a set temperature value, opening the current outlet to enable the heat exchange medium to flow out of the heat recovery pipe from the current outlet; otherwise, closing the current outlet so that the heat exchange medium continues to flow along the heat recovery pipe;
for the most downstream outlet, if the temperature of the heat exchange medium at the outlet does not reach the set temperature value, the heat exchange medium is introduced into the heat recovery pipe again through the inlet, or the heat exchange medium is made to flow out of the heat recovery pipe through the most downstream outlet.
And if the area corresponding to the temperature detection element is provided with heat exchange media flowing through, the temperature detection element is opened and sends detection data to the corresponding control valve, and the control valve controls the opening and closing of the current outlet according to the detection data.
Furthermore, the embodiment also provides an oxidized pellet preparation device, which comprises a pellet distribution device 1, a chain grate 2, a rotary kiln 3 and a circular cooler 4, wherein the circular cooler 4 is the circular cooler 4.
Referring to fig. 11 and 12, the grate heat dissipation and recovery assembly 05 of the grate of the present embodiment includes a heat recovery pipe disposed at the return lane of the grate 2, the heat recovery pipe includes at least one inlet 52 for introducing a heat exchange medium and a plurality of outlets 54 for outputting the heat exchange medium; the plurality of outlets 54 are sequentially arranged along the flow direction of the heat exchange medium.
The chain grate of this embodiment, because its chain grate heat dissipation recovery subassembly 05 is including setting up the heat recovery pipe in return lane department, and then can retrieve the heat dissipation capacity in return lane to this reaches the purpose that makes whole production line energy saving and consumption reduction. Meanwhile, because the waste heat at the return lane is recovered, the operating temperature beside the chain grate machine 2 is greatly reduced, the labor intensity of operators is reduced, and the operating environment beside the chain grate machine 2 is improved. In addition, because a plurality of outlets 54 for heat exchange media are arranged in sequence along the flowing direction of the heat exchange media, the intelligent segmented outflow of the heat exchange media is realized, the heat exchange media can be led out in a segmented manner according to the heating temperature of the heat exchange media in the heat recovery pipe and the requirements of a factory, and the heat utilization rate is further enhanced.
Wherein, the heat dissipation recovery assembly 05 of the chain grate machine and the outer wall of the blank trolley 22 on the return lane carry out radiation heat exchange.
Referring to fig. 13 and 14, the outlet 54, which is preferably, but not necessarily, located furthest downstream, communicates with the inlet 52, thereby forming a recirculation loop between the outlet 54 and the inlet 52 furthest downstream. Of course, the most downstream outlet 54 and the inlet 52 may be connected by a pipe to form a circulation loop, and any other method may be adopted as long as the heat exchange medium is allowed to flow back to the inlet 52 through the most downstream outlet 54. Furthermore, in the grate heat dissipation and recovery assembly 05 of the embodiment, the heat recovery pipes form a closed loop structure, and when the temperature of the heat exchange medium at the most downstream outlet 54 is not measured to reach the set temperature value, the heat exchange medium can be introduced into the heat recovery pipes again through the inlet 52 through the most downstream outlet 54. Under this kind of circumstances, drying grate heat dissipation recovery subassembly 05 can make full use of heat exchange medium's heat recovery ability, realizes the most make full use of to heat exchange medium.
Wherein the "most downstream outlet 54" is also: from the inlet 52 a heat exchange medium is fed, which flows along the heat recovery tubes, wherein the outlet 54, through which the heat exchange medium finally passes, is the most downstream outlet 54.
In fig. 13 and 14, a check valve 7 is provided on the circulation circuit between the most downstream outlet 54 to the inlet 52, and this check valve 7 is used to prevent the heat exchange medium from flowing from the inlet 52 to the most downstream outlet 54, that is, to prevent the heat exchange medium on the circulation circuit from flowing reversely.
The specific type of the heat exchange medium in this embodiment is not limited, as long as the heat exchange medium can exchange heat with the outer wall of the empty trolley 22 on the return lane to realize heat recovery.
In either case, the heat exchange medium is a liquid, for example, water, which is readily available and inexpensive, may be used as the heat exchange medium, and oil may be used as the heat exchange medium. In this case, a circulation pump may be provided between the most downstream outlet 54 and the inlet 52. Of course the circulation pump may also be arranged at other locations.
In another case, the heat exchange medium is a gas. In this case, a recycle fan is provided between the most downstream outlet 54 and the inlet 52. Similarly, the circulating fan may be disposed at other positions.
The remaining outlets 54, other than the most downstream outlet 54, may be connected to plant steam pipes or plant hot flue gas pipes, and the inlet 52 may be connected to a plant manifold. Wherein, when the heat exchange medium is water, the remaining outlet 54 can be connected with a steam pipe of a plant area; when the heat exchange medium is a gas, the remaining outlet 54 may be connected to a high temperature flue pipe of the plant. In this case, the heat-dissipating and recycling assembly 05 of the chain grate provides a heat exchange medium and recycles heat using facilities of a plant, and thus it can make full use of existing facilities and save manufacturing costs.
In the present embodiment, the temperature detection element 9 and the control valve 56 are provided at each outlet 54, respectively. Wherein the temperature detecting element 9 is used to detect the temperature of the heat exchange medium flowing or about to flow through the present outlet 54. The control valve 56 satisfies: when the measured temperature of the heat exchange medium reaches the set temperature value, the control valve 56 controls the current outlet 54 to be opened and allows the heat exchange medium to flow out of the heat recovery pipe through the current outlet 54. When the temperature of the heat exchange medium does not reach the set temperature value, the control valve 56 controls the current outlet 54 to be closed and allows the heat exchange medium to continue to flow along the heat recovery pipe. Wherein, for the most downstream outlet 54, when the temperature of the heat exchange medium does not reach the set temperature value, the heat exchange medium flows into the heat recovery pipe again through the inlet 52.
Referring to fig. 13 and 14, the number of outlets 54 is three and the number of inlets 52 is one. In fig. 13 and 14, three outlets 54 are connected to three different gas/liquid outlets, respectively, and inlet 52 is connected to gas/liquid inlet 53. A control valve 56 and a temperature detecting element 9 are provided on each of the air/liquid outlet pipes 55, and a fifth control valve 565 is provided on the air/liquid inlet pipe 53. Wherein the first gas/liquid pipe 551 to the second gas/liquid pipe 552 are connected to a high temperature flue gas pipe or a steam pipe of the plant area, and the third gas/liquid pipe 553 is connected to the gas/liquid pipe 53 through a circulation loop.
Of course, the number of outlets 54 and inlets 52 is not limited by the examples herein.
The heat recovery tubes are preferably, but not necessarily, serpentine tubes 051 attached to the return lane. The serpentine pipe 051 is attached to the return path, and can perform more sufficient heat exchange with the trolley 22 on the return path. And the heat exchange medium makes serpentine motion along the serpentine pipe 051, and is radiated and exchanged with the outer wall of the trolley 22 on the return lane in real time to become a high-temperature medium, so that the heat dissipation of the outer wall of the trolley 22 is more effectively utilized. Of course, the coil 051 is not necessarily attached to the return path, and the coil 051 may be disposed at any position as long as it can exchange heat with the trolley 22 on the return path.
Wherein, heat transfer fins 8 can be arranged between adjacent pipe sections of the serpentine pipe 051 to enhance the radiation type heat dissipation and recovery effect of the serpentine pipe 051. The specific form of the heat transfer rib 8 is not limited, and fig. 13 and 14 of the present embodiment show two structural forms of the heat transfer rib 8, respectively. In fig. 13, the heat transfer fins 8 are arranged perpendicular to the serpentine tubes 051, and the structure is simple and convenient to process. In fig. 14, the heat transfer ribs 8 are arranged obliquely to the serpentine pipe 051, and the area of the heat transfer ribs 8 is larger, so that the serpentine pipe 051 obtains better heat exchange effect.
Further, in this embodiment, the serpentine tube 051 has a plurality of layers from top to bottom. Here, "top to bottom" means in the direction from the upper carriage 22 to the carriage 22 on the lower turnaround.
Fig. 15 and 16 show the case where the serpentine 051 has two and three layers, respectively, which does not constitute a limitation of the heat recovery assembly 05 of the drying grate of the present application. The number of layers of the coiled pipes 051 is properly increased and the coiled pipes are distributed between the upper trolley 22 and the lower trolley 22, so that heat dissipation at the position of the return lane can be recovered, and heat dissipation at other positions of the chain grate 2 can also be reasonably recovered.
The cross-sectional area of the heat recovery tubes of the grate heat rejection recovery assembly 05 is not limited and preferably, but not necessarily, the cross-sectional area of the heat recovery tubes is circular or rectangular.
Taking the grate heat recovery assembly 05 with three outlets 54 and one inlet 52 as an example, when the grate heat recovery assembly 05 is used for heat recovery: the normal temperature air or the normal temperature water firstly enters the coil pipe 051 through the air/liquid inlet pipe 53 and the inlet 52, then moves along the coil pipe 051, absorbs the heat dissipation quantity emitted from the outer wall of the trolley 22 on the return lane through radiation heat exchange, and finally becomes high temperature air or high temperature water vapor to be discharged from the outlet 54. The temperature detection element 9 monitors the temperatures T1, T2, and T3 of the heat exchange medium at the three outlets 54 in real time. If the temperature T1 of the heat exchange medium at the first outlet 54 (the first outlet 54 in the direction of flow of the medium) has reached the desired plant temperature, the control valves 56 at the remaining two outlets 54 need not be operated, but only the first control valve at the first outlet 54 needs to be opened to withdraw the heat exchange medium from the first outlet 54. Similarly, if the temperature T2 or T3 can reach the required temperature of the plant, the second control valve or the third control valve is opened correspondingly, the other control valves 56 are closed, and the high-temperature heat exchange medium is led out from the corresponding outlets 54.
If T3 has not yet reached the plant requirements, indicating that the heat exchange medium needs to be subjected to another heat exchange, a third control valve is opened to introduce the heat exchange medium back to the inlet 52 through the circulation loop again for a new round of circulating heat exchange until the plant requirements are reached. In the process, the circulating fan/circulating pump 6 can be started, and the heat exchange medium is introduced into the gas/liquid inlet pipe 53 again through the circulating loop to perform a new round of circulating heat exchange until the requirement of the plant area is met.
Alternatively, the heat exchange medium may be directed out through the present outlet 54, provided that T3 has not yet reached the plant requirements.
The structure of the old rotary kiln device is shown in figures 2 and 3: the kiln body 31 is mounted on a plurality of pairs of idlers 32, the idlers 32 being mounted on a load bearing base 33. During production, the kiln body 31 slowly rotates anticlockwise or clockwise under the action of the carrier roller 32, so that the movement process of the pellets from the kiln tail inlet to the kiln head outlet is completed.
Further, referring to fig. 4 and 5, the rotary kiln of the present embodiment is provided with a rotary kiln heat dissipation and recovery assembly 5, the rotary kiln heat dissipation and recovery assembly 5 includes a heat recovery pipe disposed outside the kiln body 31 and used for exchanging heat with the kiln body 31, and the heat recovery pipe includes at least one inlet 52 for introducing a heat exchange medium and a plurality of outlets 54 for outputting the heat exchange medium; the plurality of outlets 54 are arranged in series along the flow direction of the heat exchange medium.
The heat recovery assembly 5 of the rotary kiln of the embodiment is provided with the heat recovery pipe arranged outside the kiln body 31 and used for exchanging heat with the kiln body 31, so that the heat dissipation capacity of the rotary kiln 3 can be recovered, and the purpose of saving energy and reducing consumption of the whole production line is achieved. Meanwhile, the waste heat beside the rotary kiln 3 is recovered, so that the operation temperature beside the kiln is greatly reduced, the labor intensity of operators is reduced, and the operation environment beside the kiln is improved. In addition, because a plurality of outlets 54 for heat exchange media are arranged in sequence along the flowing direction of the heat exchange media, the intelligent segmented outflow of the heat exchange media is realized, the heat exchange media can be led out in a segmented manner according to the heating temperature of the heat exchange media in the heat recovery pipe and the requirements of a factory, and the heat utilization rate is further enhanced.
Wherein the outlet 54, which is preferably, but not necessarily, located furthest downstream, communicates with the inlet 52, thereby forming a circulation loop between the outlet 54 and the inlet 52 furthest downstream. Of course, the most downstream outlet 54 and the inlet 52 may be connected by a pipe to form a circulation loop, and any other method may be adopted as long as the heat exchange medium is allowed to flow back to the inlet 52 through the most downstream outlet 54. Furthermore, in the rotary kiln heat dissipation and recovery assembly 5 of the present embodiment, the heat recovery pipe forms a closed loop structure, and when the temperature of the heat exchange medium at the most downstream outlet 54 is not measured to reach the set temperature value, the heat exchange medium can be introduced into the heat recovery pipe through the most downstream outlet 54 and the inlet 52 again. Under the condition, the rotary kiln heat dissipation recovery assembly 5 can make full use of the heat recovery capacity of the heat exchange medium, and the heat exchange medium is fully utilized.
Wherein the "most downstream outlet 54" is also: from the inlet 52 a heat exchange medium is fed, which flows along the heat recovery tubes, wherein the outlet 54, through which the heat exchange medium finally passes, is the most downstream outlet 54.
Further, a check valve 7 is provided on the circulation circuit between the most downstream outlet 54 to the inlet 52, and the check valve 7 is used to prevent the heat exchange medium from flowing from the inlet 52 to the most downstream outlet 54, that is, to prevent the heat exchange medium on the circulation circuit from flowing reversely.
In this embodiment, the specific type of the heat exchange medium is not limited as long as the heat exchange medium can exchange heat with the rotary kiln 3 to achieve heat recovery.
In either case, the heat exchange medium is a liquid, for example, water, which is readily available and inexpensive, may be used as the heat exchange medium, and oil may be used as the heat exchange medium. In this case, a circulation pump may be provided between the most downstream outlet 54 and the inlet 52. Of course the circulation pump may also be arranged at other locations.
In another case, the heat exchange medium is a gas. In this case, a recycle fan is provided between the most downstream outlet 54 and the inlet 52. Similarly, the circulating fan may be disposed at other positions.
In this embodiment, the remaining outlets 54, except for the most downstream outlet 54, may be connected to plant steam pipes or plant hot flue gas pipes, and the inlet 52 may be connected to a plant manifold. Wherein, when the heat exchange medium is water, the remaining outlet 54 can be connected with a steam pipe of a plant area; when the heat exchange medium is a gas, the remaining outlet 54 may be connected to a high temperature flue pipe of the plant. In this case, the rotary kiln heat dissipation and recovery assembly 5 provides a heat exchange medium and recovers heat using facilities of a plant, so that it can make full use of existing facilities and save manufacturing costs.
Referring to fig. 6, a temperature detecting element 9 and a control valve 56 are provided at each outlet 54. Wherein the temperature detecting element 9 is used to detect the temperature of the heat exchange medium flowing or about to flow through the present outlet 54. The control valve 56 satisfies: when the measured temperature of the heat exchange medium reaches the set temperature value, the control valve 56 controls the current outlet 54 to be opened and allows the heat exchange medium to flow out of the heat recovery pipe through the current outlet 54. When the temperature of the heat exchange medium does not reach the set temperature value, the control valve 56 controls the current outlet 54 to be closed and allows the heat exchange medium to continue to flow along the heat recovery pipe. Wherein, for the most downstream outlet 54, when the temperature of the heat exchange medium does not reach the set temperature value, the heat exchange medium flows into the heat recovery pipe again through the inlet 52.
In fig. 6, the number of outlets 54 is four, that is, the first gas/liquid outlet 541, the second gas/liquid outlet 542, the third gas/liquid outlet 543, and the fourth gas/liquid outlet 544, and the number of inlets 52 is one. In fig. 6, the first outlet/fluid port 541 is connected to the first outlet/fluid pipe 551, the second outlet/fluid port 542 is connected to the second outlet/fluid pipe 552, the third outlet/fluid port 543 is connected to the third outlet/fluid pipe 553, the fourth outlet/fluid port 544 is connected to the fourth outlet/fluid pipe 554, and the inlet 52 is connected to the inlet/fluid pipe 53. First, second, third and fourth air/liquid outlet pipes 551 to 554 are provided with first, second, third and fourth control valves 561, 562, 563 and 564, respectively, and first, second, third and fourth temperature detection elements 9, and 53, respectively, and an air/liquid inlet pipe 53 is provided with a fifth control valve 565. Wherein the first 551 to third 553 gas/liquid outlet pipes are connected to a high temperature flue gas pipe or a steam pipe of the plant area, and the fourth 554 is connected to the gas/liquid inlet pipe 53 through a circulation loop.
Of course, the number of outlets 54 and inlets 52 is not limited by the examples herein.
In this embodiment, the heat recovery tubes are preferably, but not necessarily, spiral tubes 51 coiled along the kiln body 31, see fig. 4 and 5. In this case, the spiral pipe 51 is sufficiently in contact with the outer surface of the kiln body 31, and heat recovery can be more effectively achieved. And the heat exchange medium does spiral motion around the kiln body 31 along the spiral pipe 51, and becomes a high-temperature medium through the radiation heat exchange with the kiln body 31 in real time, so that the heat dissipation of the kiln body 31 of the rotary kiln 3 is more effectively utilized.
Wherein, heat transfer fins 8 can be disposed between adjacent sections of the spiral tube 51 to enhance the radiation type heat dissipation and recovery effect of the spiral tube 51. The specific form of the heat transfer rib 8 is not limited, and fig. 8 and 9 of the present embodiment show two structural forms of the heat transfer rib 8, respectively. In fig. 8, the heat transfer fins 8 are provided in a large number and distributed along the circumferential direction of the spiral pipe 51, which can ensure the heat recovery uniformity of the spiral pipe 51. In fig. 9, the number of heat transfer fins 8 is small but the area of the single heat transfer fin 8 is large, which facilitates the production and can reinforce the structural strength of the spiral tube 51.
In the present embodiment, the cross-sectional area of the heat recovery pipe is not limited, and it is preferable but not necessary that the cross-sectional area of the heat recovery pipe is circular or rectangular.
The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.
Claims (10)
1. The heat dissipation and recovery assembly of the ring cooling machine is characterized by comprising a heat recovery pipe arranged at a receiving hopper of the ring cooling machine, wherein the heat recovery pipe comprises at least one inlet for introducing a heat exchange medium and a plurality of outlets for outputting the heat exchange medium; the plurality of outlets are arranged in sequence along the circulation direction of the heat exchange medium.
2. The ring cooler heat rejection recovery assembly of claim 1 wherein said outlet located most downstream communicates with said inlet.
3. The ring cooler heat rejection recovery assembly of claim 2 wherein a check valve is disposed between said outlet furthest downstream and said inlet to prevent flow of said heat exchange medium from said inlet to said outlet furthest downstream.
4. The ring cooler heat recovery assembly according to claim 2, wherein the heat exchange medium is a liquid, and a circulation pump is arranged between the most downstream outlet and the inlet;
or,
the heat exchange medium is gas, and a circulating fan is arranged between the outlet and the inlet of the most downstream.
5. The annular cooler heat recovery assembly according to claim 2, wherein the remaining outlets except the most downstream outlet are used for connecting a waste heat boiler; the inlet is for connection to a plant main.
6. The circular cooler heat dissipation recovery assembly according to any one of claims 1 to 5, wherein each of the plurality of outlets is provided with a temperature detection element and a control valve, the temperature detection element is used for detecting the temperature of the heat exchange medium flowing through or about to flow through the current outlet, and the control valve satisfies the following conditions: when the temperature of the heat exchange medium reaches a set temperature value, the control valve controls the current outlet to be opened, and the heat exchange medium flows out of the heat recovery pipe through the current outlet; when the temperature of the heat exchange medium does not reach the set temperature value, the control valve controls the current outlet to be closed, and the heat exchange medium is enabled to continuously flow along the heat recovery pipe.
7. The circular cooler heat dissipation recovery assembly according to any one of claims 1 to 5, wherein the heat recovery pipe is a spiral pipe wound along the outer wall of the receiving hopper.
8. The ring cooler heat recovery assembly according to claim 7, wherein heat transfer fins are provided on the spiral tube.
9. A ring cooler comprising a receiving hopper and a heat recovery assembly of a ring cooler according to any one of claims 1 to 8.
10. An oxidized pellet ore preparation device, comprising a pellet distribution device, a chain grate machine, a rotary kiln and a circular cooler which are arranged in sequence, wherein the circular cooler is the circular cooler in claim 9.
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| CN201821415331.1U CN209246701U (en) | 2018-08-30 | 2018-08-30 | Ring cold machine and its heat dissipation recycling component, oxide pellet Preparation equipment |
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| CN201821415331.1U CN209246701U (en) | 2018-08-30 | 2018-08-30 | Ring cold machine and its heat dissipation recycling component, oxide pellet Preparation equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895849A (en) * | 2018-08-30 | 2018-11-27 | 中冶长天国际工程有限责任公司 | Ring cold machine and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895849A (en) * | 2018-08-30 | 2018-11-27 | 中冶长天国际工程有限责任公司 | Ring cold machine and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
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