CN214199197U

CN214199197U - Large-scale components of a whole that can function independently indirect heat transfer formula gas hot-blast furnace

Info

Publication number: CN214199197U
Application number: CN202120191711.7U
Authority: CN
Inventors: 李洋; 陈玉涛
Original assignee: Jinan Yuhong Thermal Energy Equipment Co ltd
Current assignee: Jinan Yuhong Thermal Energy Equipment Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-09-14
Anticipated expiration: 2031-01-21

Abstract

The application relates to a large split indirect heat exchange type gas hot blast stove which comprises a hot blast stove body and a heat exchanger, wherein the hot blast stove body comprises a stove body, a burner and a circulating fan, and the burner and the circulating fan are communicated with the stove body; the heat exchanger includes barrel and sets up first ventilation case group and the second ventilation case group on barrel week side including interior barrel, and the one end of first ventilation case group is provided with cold wind import, and the other end of first ventilation case group is provided with hot air exitus, and the one end of first ventilation case group and the one end intercommunication setting of second ventilation case group, the other end and the second ventilation case group intercommunication setting of first ventilation case group, interior barrel and furnace body intercommunication setting, the intercommunication is provided with the blast pipe on the interior barrel. This application increases the heat transfer effect of mixed air and cold air through setting up furnace body, combustor, circulating fan, interior barrel, first ventilation case group and second ventilation case group, finally reaches the effect that improves heat exchanger heat exchange efficiency.

Description

Large-scale components of a whole that can function independently indirect heat transfer formula gas hot-blast furnace

Technical Field

The application relates to the technical field of hot blast stoves, in particular to a large split indirect heat exchange type gas hot blast stove.

Background

The hot blast stove is divided into a direct type hot blast stove and an indirect type hot blast stove, the basic principle of the indirect type hot blast stove is heat exchange, and the indirect type hot blast stove is mainly suitable for the working condition that smoke is not allowed to directly contact with a drying material.

In the correlation technique, if chinese utility model patent that the publication number is CN207196926U discloses an indirect formula gas hot-blast furnace, including hot-blast furnace shell, cold wind import, burning furnace, heat exchange assemblies, exhanst gas outlet, hot air exitus, fan, foot rest, the cold wind import is located the bottom center of hot-blast furnace shell, cold wind import top is equipped with the fan, the fan is located in the fan room, burning furnace locates through slide detachably fan room's top, heat exchange assemblies with burning furnace switches on mutually, exhanst gas outlet with hot air exitus locates hot-blast furnace shell's top, exhanst gas outlet with heat exchange assemblies intercommunication, follow the cold wind that the cold wind import got into is followed through the heating the hot air exitus output, hot-blast furnace shell locates on the foot rest. When the hot blast stove works, fuel is combusted in a combustion furnace chamber, cold air sucked from a cold air inlet is heated by heat through a heat exchange assembly, and then the cold air is blown out through a hot air outlet to realize a drying function.

Aiming at the related technologies, the inventor thinks that the hot blast stove mainly exchanges heat with the heat exchange component through cold air rising from the lower part, the rising speed of the cold air is higher under the action of the fan when the cold air rises, and then the defect that the heat exchange efficiency between the heat exchange component and the cold air is lower exists.

SUMMERY OF THE UTILITY MODEL

In order to alleviate the lower problem of heat exchange efficiency of heat exchange assembly and cold air, this application provides a large-scale components of a whole that can function independently indirect heat transfer formula gas hot-blast furnace.

The application provides a large-scale components of a whole that can function independently indirect heat transfer formula gas hot-blast furnace adopts following technical scheme:

a large split indirect heat exchange type gas hot blast stove comprises a hot blast stove body and a heat exchanger, wherein the hot blast stove body comprises a stove body, a burner and a circulating fan, and the burner and the circulating fan are communicated with the stove body; the heat exchanger includes barrel and sets up first ventilation case group and the second ventilation case group on the barrel week side including interior barrel, the one end of first ventilation case group is provided with the cold wind import, the other end of first ventilation case group is provided with hot air exitus, the one end of first ventilation case group and the one end intercommunication setting of second ventilation case group, the other end and the second ventilation case group intercommunication setting of first ventilation case group, interior barrel and furnace body intercommunication set up, the intercommunication is provided with the blast pipe on the interior barrel.

By adopting the technical scheme, when the hot blast stove is used, the burner is started, the burner is used for supplying fuel and air required by fuel combustion in the stove body, high-temperature flue gas is generated in the stove body, the circulating fan is started, the air outside the stove body is conveyed into the stove body by the circulating fan, the air conveyed into the stove body is mixed with the flue gas in the stove body to form mixed air, then the mixed air flows into the inner barrel, and the mixed air in the inner barrel is discharged through the exhaust pipe; meanwhile, cold air is conveyed into the first ventilation box group through the cold air inlet, the cold air in the first ventilation box group enters the second ventilation box group, and the cold air in the second ventilation box moves into the first ventilation box again and flows out through the hot air outlet; when cold air flows in the first ventilation box and the second ventilation box, the cold air and the mixed air with higher temperature in the inner barrel generate heat exchange, so that the temperature of the cold air is increased, and when the cold air flows in the first ventilation box and the second ventilation box, the flow path of the cold air is increased, the heat exchange effect of the cold air and the mixed air is further increased, and the effect of improving the heat exchange efficiency of the heat exchanger is finally achieved.

Optionally, the first ventilation box group and the second ventilation box group are arranged oppositely, the first ventilation box group is arranged on one side of the inner cylinder body, and the second ventilation box group is arranged on the other side of the inner cylinder body.

Through adopting above-mentioned technical scheme, get into in the second ventilation case group after the mixed air heat transfer in the cold air in the first ventilation case group and the interior barrel, then make the cold air in the second ventilation case group again with in the mixed air heat transfer in the barrel get into again in the first ventilation case group, set up the both sides that the barrel is relative including first ventilation case group and second ventilation case group, can increase the flow path of cold air, thereby increase the heat transfer effect of cold air and mist, and then improve the heat exchanger to the heat transfer effect of cold air.

Optionally, the first ventilation box group comprises a first ventilation box, a second ventilation box and a third ventilation box, the first ventilation box, the second ventilation box and the third ventilation box are sequentially arranged along the axial direction of the inner cylinder body, the cold air inlet is arranged on the first ventilation box, and the hot air outlet is arranged on the third ventilation box; the second ventilation box set comprises a fourth ventilation box and a fifth ventilation box, the fourth ventilation box and the fifth ventilation box are sequentially arranged along the axial direction of the inner barrel body, the first ventilation box is communicated with the fourth ventilation box, the fourth ventilation box is communicated with the second ventilation box, the second ventilation box is communicated with the fifth ventilation box, and the fifth ventilation box is communicated with the third ventilation box.

Through adopting above-mentioned technical scheme, cold air gets into in the first ventilation case through the cold wind import, cold air in the first ventilation case gets into in the fourth ventilation case, cold air in the fourth ventilation case gets into in the second ventilation case, cold air in the second ventilation case gets into in the fifth ventilation case, cold air in the fifth ventilation case gets into in the third ventilation case, make the air in the third ventilation case flow through hot air exitus then, cold air is when flowing in first ventilation case, the second ventilation case, the third ventilation case, when the fourth ventilation case and the fifth ventilation case, cold air carries out the heat exchange with the mixed air in the interior barrel, further increase the flow path of cold air, further reach the effect that increases heat exchanger heat exchange efficiency.

Optionally, the volume of the first ventilation box is smaller than the volume of the third ventilation box.

Through adopting above-mentioned technical scheme, the volume of third ventilation case is greater than the volume of first ventilation case, can be so that the speed when cold air flows along first ventilation case, fourth ventilation case, second ventilation case, fifth ventilation case and third ventilation case for the flow velocity of cold air is more and more low, thereby increases the heat transfer time of cold air and air-fuel mixture, and then increases the heat transfer effect of heat exchanger to cold air.

Optionally, the first ventilation box is located at one end of the inner cylinder body, which is far away from the end communicated with the furnace body.

Through adopting above-mentioned technical scheme, the temperature of mixed air has the trend that reduces gradually along keeping away from interior barrel and furnace body connected's one end, and the barrel keeps away from the one end of self and furnace body intercommunication including arranging first ventilation case, can be so that the temperature of cold air has the trend that risees gradually along the one end that is close to interior barrel and furnace body intercommunication, and then improves the heat transfer effect of heat exchanger, finally reaches the effect that improves the heat utilization ratio of mixed air.

Optionally, a plurality of ventilation pipes are arranged in the inner cylinder, and the ventilation pipes are sequentially divided into a first ventilation pipe group, a second ventilation pipe group, a third ventilation pipe group and a fourth ventilation pipe group along one end far away from the inner cylinder and communicated with the furnace body; one ends of a plurality of ventilation pipes in the first ventilation pipe group are communicated with the third ventilation box, and the other ends of the plurality of ventilation pipes in the first ventilation pipe group are communicated with the fifth ventilation box; one ends of a plurality of ventilation pipes in the second ventilation pipe group are communicated with the second ventilation box, and the other ends of the plurality of ventilation pipes in the second ventilation pipe group are communicated with the fifth ventilation box; one ends of a plurality of ventilation pipes in the third ventilation pipe group are communicated with the second ventilation box, and the other ends of the plurality of ventilation pipes in the third ventilation pipe group are communicated with the fourth ventilation box; one end and the first ventilation case intercommunication setting of many ventilation pipes in the fourth ventilation nest of tubes, the other end and the fourth ventilation case intercommunication setting of many ventilation pipes in the fourth ventilation nest of tubes.

By adopting the technical scheme, cold air entering the first ventilation box through the cold air inlet enters the fourth ventilation pipe group, then the cold air is subjected to heat exchange with mixed air in the inner barrel in the fourth ventilation pipe group, then the cold air in the fourth ventilation pipe group enters the fourth ventilation box, the cold air in the fourth ventilation box enters the second ventilation box through a plurality of ventilation pipes in the third ventilation pipe group, the cold air in the second ventilation box enters the fifth ventilation box through the second ventilation pipe group, the cold air in the fifth ventilation box enters the third ventilation box through a plurality of ventilation pipes in the first ventilation pipe group, and finally the air in the third ventilation box flows out through the hot air outlet; through setting up many ventilation pipes to in barrel including the ventilation pipe setting, can increase the area of contact of cold air and air mixture, increase the heat transfer effect of cold air and air mixture.

Optionally, the number of the ventilation pipes in the first ventilation pipe group, the second ventilation pipe group, the third ventilation pipe group and the fourth ventilation pipe group is reduced in sequence.

Through adopting above-mentioned technical scheme, set up the quantity of ventilation pipe in first ventilation nest of tubes, second ventilation nest of tubes, third ventilation nest of tubes and the fourth ventilation nest of tubes into reducing in proper order, can make the flow velocity of cold air in first ventilation nest of tubes, second ventilation nest of tubes, third ventilation nest of tubes and fourth ventilation nest of tubes improve in proper order to increase the contact time of cold air and air-fuel mixture, and then increase the heat exchange efficiency of heat exchanger.

Optionally, a plurality of ventilation pipes in the first ventilation pipe group, the second ventilation pipe group, the third ventilation pipe group and the fourth ventilation pipe group are equally divided into a plurality of layers, and the ventilation pipes in two adjacent layers are arranged in a staggered manner.

Through adopting above-mentioned technical scheme, divide into the multilayer setting with many ventilation pipes to the crisscross setting of ventilation pipe in the adjacent two-layer ventilation pipe can increase the smooth and easy nature of mixed air when flowing in the barrel including, increases the homogeneity of mixed air in the barrel including, finally increases the heat transfer homogeneity of mixed air and cold air.

Optionally, a preheating assembly is arranged on the exhaust pipe, the preheating assembly is communicated with the cold air inlet, and the preheating assembly is used for heating cold air.

Through adopting above-mentioned technical scheme, when cold air got into first ventilation case through the cold wind import, preheat the subassembly and utilize the heat of blast pipe to preheat cold air in advance to make the temperature of cold air improve, and then realize mixed air's waste heat utilization, improve mixed air's utilization ratio.

Optionally, the exhaust pipe and the circulating fan are both provided with a three-way joint in a communicated manner, and the three-way joint on the exhaust pipe is communicated with the three-way joint on the circulating fan.

By adopting the technical scheme, one part of mixed air in the exhaust pipe enters the circulating fan through the three-way joint, the rest mixed air in the exhaust pipe is discharged through the other outlet of the three-way joint, and the air in the atmosphere enters the circulating fan through one inlet of the three-way joint on the circulating fan, so that the amount of fresh air entering the furnace body can be increased on one hand, and the temperature of the air entering the furnace body can be increased on the other hand.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the stove body, the burner, the circulating fan, the inner barrel, the first ventilation box group and the second ventilation box group, when the hot blast stove works, the burner provides fuel and air required by combustion for the stove body, meanwhile, flame is generated in the stove body, the circulating fan provides air for the stove body, the air and flue gas generated by flame combustion are mixed together to form mixed air, the mixed air enters the inner barrel, the inner barrel heats the first ventilation box group and the second ventilation box group, the first ventilation box group and the second ventilation box group can increase the flow path of cold air, further the heat exchange effect of the mixed air and the cold air is increased, and finally the effect of improving the heat exchange efficiency of the heat exchanger is achieved;

2. the first ventilation box group and the second ventilation box group are respectively arranged on two opposite sides of the inner cylinder body, so that the flow path of cold air can be increased, the contact time of the cold air and mixed air is prolonged, and the heat exchange effect of the heat exchanger on the cold air is further increased;

3. through setting up first ventilation case, second ventilation case, third ventilation case, fourth ventilation case and fifth ventilation case, cold air flows into in the fourth ventilation case in first ventilation case, then gets into the second ventilation case, in getting into the fifth ventilation case, finally gets into the third ventilation case, and then increases the flow path of cold air, finally reaches the heat transfer effect that increases the heat exchanger to cold air.

Drawings

FIG. 1 is a front view of a stove according to an embodiment of the present application, with arrows indicating the direction of air flow;

FIG. 2 is a schematic structural view of a hot blast stove body in a hot blast stove according to an embodiment of the present application, in which arrows indicate the flow direction of air;

FIG. 3 is a top plan view of a stove according to an embodiment of the present application, with arrows indicating the direction of air flow;

FIG. 4 is a schematic view showing the structure of a communicating vessel in a hot blast stove according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a heat exchanger in a hot blast stove according to an embodiment of the present application, in which arrows indicate the flow direction of air.

Description of reference numerals: 100. a hot blast stove body; 110. a furnace body; 111. an outer cylinder; 112. a middle cylinder; 113. an inner container; 114. closing the plate; 115. a front panel; 116. a rear panel; 117. a heat-insulating layer; 118. a base; 120. a combustion engine; 121. an overlapping section; 122. a mixing section; 123. a first mixing section; 124. a reducing section; 125. a second mixing section; 126. a support block; 127. a refractory layer; 128. a guide surface; 130. a circulating fan; 131. a first stage; 132. a diameter expanding section; 133. a second stage; 134. a heat sink; 135. a limiting block; 200. a heat exchanger; 210. an inner cylinder; 211. a first vent tube group; 212. a second draft tube bank; 213. a third bank of draft tubes; 214. a fourth bank of draft tubes; 215. an exhaust pipe; 216. a three-way joint; 217. an auxiliary tube; 220. a first ventilation box group; 221. a first ventilation box; 222. a second ventilation box; 223. a third bellows; 224. a cold air inlet; 225. a cold air outlet; 230. a second ventilation box group; 231. a fourth bellows; 232. a fifth through air box; 300. a communicating vessel; 310. a connecting pipe; 311. an access hole; 312. a temperature measuring port; 313. a pressure measuring port; 314. a sampling port; 315. an access door; 316. an observation window; 320. emptying the pipe; 321. an explosion venting port; 400. a preheating assembly; 410. a preheating box; 411. an air inlet; 420. a preheating pipe; 500. a smoke exhaust fan; 510. and (4) a chimney.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a large split indirect heat exchange type gas hot blast stove.

Referring to fig. 1, the large-scale split indirect heat exchange type gas hot blast stove comprises a hot blast stove body 100, a heat exchanger 200 and a communicating vessel 300, wherein the hot blast stove body 100 is used for generating high-temperature mixed air, the heat exchanger 200 is used for exchanging heat between the mixed air and cold air, and the communicating vessel 300 is used for conveying the high-temperature mixed air generated by the hot blast stove body 100 to the heat exchanger 200.

Referring to fig. 2 and 3, the stove body 100 includes a stove body 110, a burner 120, and a circulating fan 130. The burner 120 is communicated with the furnace body 110, and the burner 120 is used for supplying fuel and air required by the combustion of the fuel into the furnace body 110 and generating high-temperature flue gas in the furnace body 110. The circulating fan 130 is communicated with the furnace body 110, and the circulating fan 130 is used for supplementing air into the furnace body 110, so that high-temperature mixed air is formed in the furnace body 110.

Referring to fig. 2 and 3, the furnace body 110 includes an outer cylinder 111, an intermediate cylinder 112, and an inner container 113. One end of the outer cylinder 111 is provided with a sealing plate 114 and a front panel 115 at intervals, the sealing plate 114 and the front panel 115 are both perpendicular to the axial direction of the outer cylinder 111, and the sealing plate 114 is fixedly connected with the outer cylinder 111. The other end of the outer cylinder 111 is fixedly connected with a rear panel 116, and the rear panel 116 is perpendicular to the axial direction of the outer cylinder 111. The sealing plate 114, the rear panel 116 and the outer cylinder 111 together form a closed cavity. An insulating layer 117 is fixedly connected between the front panel 115 and the sealing plate 114 and on the peripheral side surface of the outer cylinder 111, and the insulating layer 117 is built by red bricks. When the hot blast stove works, the heat preservation layer 117 can preserve heat of the outer cylinder 111, heat exchange between the inside of the outer cylinder 111 and the outside of the outer cylinder 111 is reduced, and heat loss inside the outer cylinder 111 is further reduced.

Referring to fig. 2 and 3, a base 118 is disposed at the bottom of the outer cylinder 111, the base 118 is disposed parallel to the central axis of the outer cylinder 111, and the base 118 is fixedly connected to the insulating layer 117. One end of the base 118 is fixedly connected with the front panel 115, and the other end of the base 118 is fixedly connected with the rear panel 116. The fuel injection port of the burner 120 is fixedly connected with the front panel 115, and the central axis of the fuel injection port of the burner 120 is arranged in line with the central axis of the outer cylinder 111. The circulating fan 130 is communicated with the inside of the outer cylinder 111, and the circulating fan 130 is located at one end of the outer cylinder 111 far away from the burner 120. The air outlet of the circulating fan 130 is fixedly connected with the peripheral side surface of the outer cylinder 111, and the air outlet of the circulating fan 130 is located on one side of the outer cylinder 111 close to the base 118. When the circulation fan 130 operates, the circulation fan 130 blows air outside the outer cylinder 111 into the outer cylinder 111.

Referring to fig. 2 and 3, the middle cylinder 112 is coaxially disposed with the outer cylinder 111, the middle cylinder 112 is disposed inside the outer cylinder 111, and a gap is left between the middle cylinder 112 and the outer cylinder 111. The middle cylinder 112 is sequentially divided into an overlapping section 121 and a mixing section 122 along a direction away from the combustor 120, the overlapping section 121 is communicated with the inside of the outer cylinder 111, and the mixing section 122 is communicated with the outside of the middle cylinder 112. A plurality of supporting blocks 126 are fixedly connected to the circumferential side surface of the overlapping section 121 close to one end of the burner 120, the supporting blocks 126 are uniformly arranged along the circumferential direction of the middle cylinder 112 at intervals, and one end of each supporting block 126 far away from the overlapping section 121 is fixedly connected with the inner wall of the outer cylinder 111.

Referring to fig. 2 and 3, the overlapping section 121 has a tendency to gradually decrease in diameter near the end of the combustor 120. The mixing section 122 is sequentially divided into a first mixing section 123, a reducing section 124 and a second mixing section 125 along one end far away from the combustor 120, the diameter of the first mixing section 123 is larger than that of the second mixing section 125, and the second mixing section 125 is fixedly connected with the rear panel 116 and penetrates out of the rear panel 116. The inner walls of the first mixing section 123, the reducing section 124 and the second mixing section 125 are all fixedly connected with a fire-resistant layer 127 along the circumferential direction, and the fire-resistant layer 127 is formed by stacking refractory bricks. The refractory layer 127 has a pilot surface 128 at an end thereof adjacent the burner 120.

The air blown into the outer cylinder 111 by the blower enters between the outer cylinder 111 and the intermediate cylinder 112, and then the air is guided by the circumferential side surface of the intermediate cylinder 112 while the air moves in the axial direction of the intermediate cylinder 112. The air is heated by the outer cylinder 111 and the middle cylinder 112 during the movement, and then the air moves into the middle cylinder 112.

Referring to fig. 2 and 3, the inner container 113 is coaxially disposed with the overlapping section 121, the inner container 113 is disposed inside the overlapping section 121, and a gap is left between the inner container 113 and the intermediate cylinder 112. An end of the liner 113 remote from the combustor 120 extends into the first mixing section 123. One end of the inner container 113 is communicated with a fuel injection port of the burner 120, and the other end of the inner container 113 is communicated with the first mixing section 123.

Referring to fig. 2 and 3, the liner 113 is sequentially divided into a first section 131, an expanded diameter section 132, and a second section 133 in a direction away from the burner 120, and the first section 131 has a smaller diameter than the second section 133. One end of the first section 131 close to the burner 120 penetrates through the sealing plate 114 and the insulating layer 117 and is fixedly connected with the front panel 115, and the first section 131 is communicated with a fuel injection port of the burner 120. The diameter of the second section 133 at the end remote from the combustor 120 has a tendency to decrease. When the air between the inner container 113 and the middle cylinder 112 flows into the first mixing section 123, the end of the second section 133 away from the burner 120 and the guide surface 128 on the flame retardant layer 127 guide the air, so that the air between the middle cylinder 112 and the inner container 113 moves toward the direction of the central axis of the outer cylinder 111, thereby increasing the effect of mixing the air flowing out from between the inner container 113 and the middle cylinder 112 and the air flowing out from the inner container 113.

The air entering the middle cylinder 112 is positioned between the middle cylinder 112 and the inner container 113, so that the middle cylinder 112 and the inner container 113 heat the air, and the air between the inner container 113 and the middle cylinder 112 moves along the axial direction of the inner container 113, so that the air flowing out from between the middle cylinder 112 and the inner container 113 is mixed with the smoke flowing out from the inner container 113 to form mixed air; because the diameter of the first mixing section 123 is greater than that of the second mixing section 125, when the mixed air continues to move, the mixed air gathers towards the central axis direction of the outer cylinder 111, and then the mixing uniformity of the mixed air is increased, so that the temperature of the mixed air is consistent.

Referring to fig. 2 and 3, a plurality of limit blocks 135 are fixedly connected to a circumferential side surface of one end of the second section 133 away from the burner 120, and the plurality of limit blocks 135 are uniformly spaced along a circumferential direction of the second section 133. The plurality of stoppers 135 are disposed in a coplanar manner, and a plane in which the plurality of stoppers 135 are disposed in common is perpendicular to the axial direction of the second segment 133. A gap is reserved between the end part of each limit block 135 and the end part of the fire-resistant layer 127 close to the burner 120, and one end of each limit block 135 far away from the liner 113 is abutted against the inner wall of the overlapping section 121. As the hot blast stove continues to operate, the temperature of the second section 133 is higher and higher, which in turn causes the second section 133 to expand; when the second segment 133 moves along the axial direction of itself, the second segment 133 drives the limiting block 135 to move; when the limit block 135 abuts against the fire-resistant layer 127, the limit block 135 stops moving, so that the second segment 133 stops expanding in the axial direction thereof, and the influence of the contact of the second segment 133 with the fire-resistant layer 127 on the air movement between the inner container 113 and the intermediate cylinder 112 is reduced.

Referring to fig. 2 and 3, a plurality of fins 134 are fixedly connected to the circumferential side surfaces of the diameter-expanding section 132 and the second section 133, and the plurality of fins 134 are uniformly spaced in the axial direction of the diameter-expanding section 132 and the second section 133. Each of the fins 134 has a ring shape, and the outer circumferential surface of each of the fins 134 has a gap from the inner wall of the overlapping section 121. When the air moves between the inner container 113 and the middle cylinder 112, the air between the inner container 113 and the middle cylinder 112 contacts with the radiating fins 134, and the heating effect of the residual heat of the air between the inner container 113 and the middle cylinder 112 by the hot blast stove body 100 is further improved.

Referring to fig. 1, 2 and 4, the communicating vessel 300 includes a connection pipe 310 and an emptying pipe 320, one end of the connection pipe 310 is fixedly connected and communicated with the second mixing section 125, and the other end of the connection pipe 310 is provided in communication with the heat exchanger 200. The heat-insulating layer 117 is also fixedly connected to the periphery of the connecting pipe 310, and the heat-insulating layer 117 is built by red bricks. The evacuation pipe 320 is fixedly connected and communicated with the connecting pipe 310, one end of the evacuation pipe 320, which is far away from the connecting pipe 310, penetrates out of the insulating layer 117 and is communicated with the outside of the connecting pipe 310, and the evacuation pipe 320 is coaxially and fixedly connected with an explosion venting port 321. When the pressure in the connection pipe 310 is high, the explosion relief port 321 is opened, and the mixed air in the connection pipe 310 is exhausted through the exhaust pipe 320, so that the pressure in the connection pipe 310 is reduced.

Referring to fig. 2 and 4, the connection pipe 310 is provided with an access opening 311, and a central axis of the access opening 311 is arranged in line with a central axis of the outer cylinder 111. The access opening 311 is detachably connected with an access door 315, the access door 315 is provided with an observation window 316, and the observation window 316 is located at the center of the access door 315. When the hot blast stove body 100 breaks down, a worker can observe the condition inside the hot blast stove body 100 through the observation window 316; if the inside needs overhaul of hot-blast furnace body 100, the staff can take off access door 315, then enters into middle barrel 112 through access hole 311, and then reaches the effect that makes things convenient for the staff to overhaul hot-blast furnace body 100.

Referring to fig. 1 and 4, the connection tube 310 is provided with a temperature measuring port 312, a pressure measuring port 313 and a sampling port 314, and the connection tube 310 is detachably connected with sealing plugs corresponding to the temperature measuring port 312, the pressure measuring port 313 and the sampling port 314. When the temperature of the mixed air in the connection pipe 310 is measured, the sealing plug is removed, and then the temperature sensor is inserted into the connection pipe 310 through the temperature measuring port 312, thereby completing the detection of the temperature of the mixed air in the connection pipe 310. When the pressure of the mixed air in the connection pipe 310 is detected, the sealing plug is removed, and then the pressure sensor is inserted into the connection pipe 310 through the pressure measuring port 313, thereby completing the detection of the pressure of the mixed air in the connection pipe 310. When the mixed air in the connection pipe 310 is sampled, the sealing plug is removed, and then the sampler is inserted into the connection pipe 310 through the sampling port 314, thereby completing the sampling of the mixed air in the connection pipe 310.

Referring to fig. 1 and 5, the heat exchanger 200 includes an inner cylinder 210, a first ventilation box group 220, and a second ventilation box group 230. One end of the inner cylinder 210 is fixedly connected and communicated with one end of the connecting pipe 310 far away from the second mixing section 125, the other end of the inner cylinder 210 is fixedly connected with the exhaust pipe 215, and the exhaust pipe 215 is communicated with the inner cylinder 210. The first and

second ventilation boxes

220 and 230 are oppositely disposed, and the first ventilation box 220 is disposed at one side of the inner cylinder 210, and the second ventilation box 230 is disposed at the other side of the inner cylinder 210. One end of the first ventilation box group 220 is communicated with one end of the second ventilation box group 230, and the other end of the first ventilation box group 220 is communicated with the other end of the second ventilation box group 230. One end of the first air box group 220 is provided with a cool air inlet 224, and the other end of the first air box group 220 is provided with a hot air outlet 225.

The cold air enters the first ventilation box group 220 through the cold air inlet 224, the cold air in the first ventilation box group 220 enters the second ventilation box group 230 after being heated by the inner cylinder 210, the cold air in the second ventilation box group 230 enters the first ventilation box group 220 after being heated by the inner cylinder 210, and then the cold air is discharged out of the first ventilation box group 220 through the hot air outlet 225 after being reheated by the inner cylinder 210.

Referring to fig. 1 and 5, the first air box group 220 includes a first air box 221, a second air box 222, and a third air box 223, and the first air box 221, the second air box 222, and the third air box 223 are sequentially arranged in a direction adjacent to the connection pipe 310. In order to slow down the flow rate of the cool air, the volume of the first vent box 221 is smaller than that of the third vent box 223, and the volume of the second vent box 222 is larger than that of the third vent box 223. In order to make the temperature of the cold air gradually rise to sufficiently exchange heat with the mixed air, a cold air inlet 224 is disposed on the first ventilation box 221, and a hot air outlet 225 is disposed on the third ventilation box 223. The first vent box 221, the second vent box 222 and the third vent box 223 are all fixedly connected with the peripheral side surface of the inner cylinder 210.

Referring to fig. 1 and 5, the second ventilation tank group 230 includes a fourth vent box 231 and a fifth vent box 232, the fourth vent box 231 and the fifth vent box 232 are sequentially arranged in a direction close to the connection pipe 310, and a volume of the fifth vent box 232 is greater than a volume of the fourth vent box 231. The fourth vent 231 and the fifth vent 232 are both fixedly connected to the peripheral side of the inner cylinder 210.

Referring to fig. 1 and 5, a plurality of ventilation pipes (only some ventilation pipes are shown in fig. 1 and 5 for easy understanding) are fixedly connected to the inner cylinder 210, and are sequentially divided into a first ventilation pipe group 211, a second ventilation pipe group 212, a third ventilation pipe group 213, and a fourth ventilation pipe group 214 in a direction away from the connection pipe 310, and the number of ventilation pipes in the first ventilation pipe group 211, the second ventilation pipe group 212, the third ventilation pipe group 213, and the fourth ventilation pipe group 214 is sequentially reduced. Many ventilation pipes evenly distributed in first ventilation nest of tubes 211, second ventilation nest of tubes 212, third ventilation nest of tubes 213 and fourth ventilation nest of tubes 214 to many ventilation pipes in first ventilation nest of tubes 211, second ventilation nest of tubes 212, third ventilation nest of tubes 213 and the fourth ventilation nest of tubes 214 are equallyd divide for the multilayer setting, and adjacent two-layer ventilation pipe sets up in a staggered way.

Referring to fig. 1 and 5, one end of the plurality of ventilation tubes in the first ventilation tube group 211 is disposed to communicate with the third ventilation box 223, and the other end of the plurality of ventilation tubes in the first ventilation tube group 211 is disposed to communicate with the fifth ventilation box 232. One end of a plurality of ventilation pipes in the second ventilation pipe set 212 is communicated with the fifth ventilation box 232, and the other end of a plurality of ventilation pipes in the second ventilation box 222 is communicated with the second ventilation box 222. One end of a plurality of ventilation pipes in the third ventilation pipe set 213 is communicated with the second ventilation box 222, and the other end of the plurality of ventilation pipes in the third ventilation pipe set 213 is communicated with the fourth ventilation box 231. One end of a plurality of ventilation pipes in the fourth ventilation pipe set 214 is communicated with the fourth ventilation pipe box 231, and the other end of the plurality of ventilation pipes in the fourth ventilation pipe set 214 is communicated with the first ventilation pipe box 221.

Referring to fig. 1 and 5, cold air in the first ventilation box group 220 enters the fourth ventilation box 231 through a plurality of ventilation pipes in the fourth ventilation pipe group 214, then enters the second ventilation box 222 through a plurality of ventilation pipes in the third ventilation pipe group 213, then enters the fifth ventilation box 232 through a plurality of ventilation pipes in the second ventilation pipe group 212, and finally enters the third ventilation box 223 through a plurality of ventilation pipes in a ventilation pipe group; when cold air flows in the ventilation pipe, the heat exchange area between the cold air and the mixed air is increased, and the heat exchange effect between the cold air and the mixed air can be increased by arranging the ventilation pipe inside the inner cylinder 210; the number of the ventilation pipes in the first ventilation pipe group 211, the second ventilation pipe group 212, the third ventilation pipe group 213 and the fourth ventilation pipe group 214 is reduced in sequence, so that the effect of slowing down the flowing speed of cold air can be achieved, the heat exchange time of the cold air and mixed air is prolonged, and the heat exchange effect of the cold air and the mixed air is finally achieved.

Referring to fig. 1 and 5, the inner cylinder 210, the first ventilation box 221, the second ventilation box 222, the third ventilation box 223, the fourth ventilation box 231, and the fifth ventilation box 232 are also fixedly connected with the heat insulation layer 117, and the heat insulation layer 117 is built by red bricks. When the heat exchanger 200 operates, the heat insulation layer 117 can reduce heat loss of the inner cylinder 210, the first vent box 221, the second vent box 222, the third vent box 223, the fourth vent box 231 and the fifth vent box 232.

Referring to fig. 1 and 3, in order to increase the waste heat utilization efficiency of the hot blast stove, a preheating assembly 400 may be further disposed on the exhaust pipe 215, the preheating assembly 400 includes a preheating tank 410 and a preheating pipe 420, one end of the preheating pipe 420 is fixedly connected and communicated with the preheating tank 410, and the other end of the preheating pipe 420 is fixedly connected and communicated with the cold air inlet 224. The preheating box 410 is provided with an air inlet 411, the preheating box 410 is coaxially and fixedly connected with the exhaust pipe 215, and the preheating box 410 is arranged outside the exhaust pipe 215. When cold air is conveyed to the heat exchanger 200, the cold air is conveyed to the waste heat box through the air inlet 411, because mixed air flows in the exhaust pipe 215, the mixed air heats the exhaust pipe 215, then the exhaust pipe 215 preheats the cold air in the preheating box 410, so that the temperature of the cold air is increased, the cold air in the preheating box 410 enters the first ventilation box 221 through the preheating pipe 420 and the cold air inlet 224, the preheating effect of the cold air is achieved, and the waste heat utilization efficiency of the hot blast stove is improved.

Referring to fig. 1 and 3, in order to increase the temperature of the air entering the outer cylinder 111, a three-way joint 216 is provided in communication between one end of the exhaust pipe 215 away from the inner cylinder 210 and the air inlet of the circulating fan 130. The three-way joint 216 on the exhaust pipe 215 and the three-way joint 216 on the circulating fan 130 are communicated through the auxiliary pipe 217, the three-way joint 216 on the exhaust pipe 215 is communicated with the smoke exhaust fan 500, and the air outlet of the smoke exhaust fan 500 is communicated with the chimney 510. A part of the mixed air in the exhaust pipe 215 enters the circulating fan 130 through the auxiliary pipe 217, and then is mixed with the air in the circulating fan 130, so that the temperature of the air in the circulating fan 130 is increased; another portion of the mixed air in the exhaust duct 215 flows into the smoke exhaust fan 500, causing the mixed air to be exhausted through a chimney 510.

The implementation principle of the large split indirect heat exchange type gas hot blast stove is as follows: when the hot blast stove works, the burner 120 and the circulating fan 130 are started, the burner 120 supplies fuel and air required by fuel combustion to the inner container 113, smoke is generated in the inner container 113 after the fuel is combusted, and the smoke moves towards the middle cylinder 112. The air outside the outer cylinder 111 of the circulating fan 130 is delivered into the outer cylinder 111, and then the outer cylinder 111 and the middle cylinder 112 heat the air, and the air moves along the axial direction of the middle cylinder 112, so that the air flows between the middle cylinder 112 and the inner container 113, the inner container 113 and the middle cylinder 112 heat the air, and then the air is mixed with the smoke and forms mixed air.

The mixed air flows into the inner cylinder 210 through the connection pipe 310, and then flows through the gaps between the plurality of ventilation pipes while the mixed air heats the ventilation pipes. Cold air enters the first ventilation box 221 through the cold air inlet 224, the cold air in the first ventilation box 221 enters the fourth ventilation box 231 through a plurality of ventilation pipes in the fourth ventilation pipe group 214, then the cold air flows into the second ventilation box 222 through a plurality of ventilation pipes in the third ventilation pipe group 213, the cold air enters the fifth ventilation box 232 through a plurality of ventilation pipes in the second ventilation pipe group 212, and the cold air enters the third ventilation box 223 through a plurality of ventilation pipes in the first ventilation pipe group 211. The cold air is heated by flowing through the plurality of ventilation pipes, and then becomes hot air, and the hot air enters the third air box 223 and then flows out of the third air box 223 through the hot air outlet 225.

The mixed air in the inner cylinder 210 enters the exhaust pipe 215, and then the mixed air heats the exhaust pipe 215 by using its own waste heat, the cold air enters the preheating tank 410, the air in the preheating tank 410 is heated by the exhaust pipe 215, and then the cold air in the preheating tank 410 enters the first ventilation tank 221 through the preheating pipe 420 and the cold air inlet 224. One part of mixed air in the exhaust pipe 215 is communicated with the circulating fan 130 through a tee joint, and the other part of mixed air in the exhaust pipe 215 enters the smoke exhaust fan 500 through a tee joint 216 and is finally exhausted from a chimney 510. The mixed air entering the circulation fan 130 is mixed with the air entering the circulation fan 130 from the outside, thereby increasing the temperature of the air in the circulation fan 130.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a large-scale components of a whole that can function independently indirect heat transfer formula gas hot-blast furnace which characterized in that: the hot blast stove comprises a hot blast stove body (100) and a heat exchanger (200), wherein the hot blast stove body (100) comprises a stove body (110), a burner (120) and a circulating fan (130), and the burner (120) and the circulating fan (130) are communicated with the stove body (110); heat exchanger (200) including interior barrel (210) and setting up first ventilation case group (220) and second ventilation case group (230) on barrel (210) side all around, the one end of first ventilation case group (220) is provided with cold wind import (224), the other end of first ventilation case group (220) is provided with hot air outlet (225), the one end of first ventilation case group (220) and the one end intercommunication setting of second ventilation case group (230), the other end and the second ventilation case group (230) intercommunication setting of first ventilation case group (220), interior barrel (210) and furnace body (110) intercommunication setting, the intercommunication is provided with blast pipe (215) on interior barrel (210).

2. The large split indirect heat exchange type gas hot blast stove according to claim 1, characterized in that: the first ventilation box group (220) and the second ventilation box group (230) are arranged oppositely, the first ventilation box group (220) is arranged on one side of the inner cylinder body (210), and the second ventilation box group (230) is arranged on the other side of the inner cylinder body (210).

3. The large split indirect heat exchange type gas hot blast stove according to claim 1, characterized in that: the first ventilation box group (220) comprises a first ventilation box (221), a second ventilation box (222) and a third ventilation box (223), the first ventilation box (221), the second ventilation box (222) and the third ventilation box (223) are sequentially arranged along the axial direction of the inner cylinder body (210), the cold air inlet (224) is formed in the first ventilation box (221), and the hot air outlet (225) is formed in the third ventilation box (223); second ventilation case group (230) include fourth bellows (231) and fifth bellows (232), fourth bellows (231) and fifth bellows (232) set gradually along the axial of interior barrel (210), first ventilation case (221) set up with fourth bellows (231) intercommunication, fourth bellows (231) set up with second bellows (222) intercommunication, second bellows (222) set up with fifth bellows (232) intercommunication, fifth bellows (232) set up with third bellows (223) intercommunication.

4. The large split indirect heat exchange type gas hot blast stove according to claim 3, characterized in that: the volume of the first ventilation box (221) is smaller than that of the third ventilation box (223).

5. The large split indirect heat exchange type gas hot blast stove according to claim 3, characterized in that: the first ventilation box (221) is located at one end, far away from the inner cylinder body (210), of the inner cylinder body and communicated with the furnace body (110).

6. The large split indirect heat exchange type gas hot blast stove according to claim 3, characterized in that: a plurality of ventilation pipes are arranged in the inner cylinder (210), and are sequentially divided into a first ventilation pipe group (211), a second ventilation pipe group (212), a third ventilation pipe group (213) and a fourth ventilation pipe group (214) along one end far away from the inner cylinder (210) and communicated with the furnace body (110); one ends of a plurality of ventilation pipes in the first ventilation pipe group (211) are communicated with the third ventilation box (223), and the other ends of the plurality of ventilation pipes in the first ventilation pipe group (211) are communicated with the fifth ventilation box (232); one ends of a plurality of ventilation pipes in the second ventilation pipe group (212) are communicated with the second ventilation box (222), and the other ends of the plurality of ventilation pipes in the second ventilation pipe group (212) are communicated with the fifth ventilation box (232); one ends of a plurality of ventilation pipes in the third ventilation pipe group (213) are communicated with the second ventilation box (222), and the other ends of the plurality of ventilation pipes in the third ventilation pipe group (213) are communicated with the fourth ventilation box (231); one end and the first ventilation case (221) intercommunication setting of many ventilation pipes in fourth ventilation nest of tubes (214), the other end and the fourth ventilation case (231) intercommunication setting of many ventilation pipes in fourth ventilation nest of tubes (214).

7. The large split indirect heat exchange type gas hot blast stove according to claim 6, characterized in that: the number of ventilation pipes in the first ventilation pipe group (211), the second ventilation pipe group (212), the third ventilation pipe group (213) and the fourth ventilation pipe group (214) is reduced in sequence.

8. The large split indirect heat exchange type gas hot blast stove according to claim 6, characterized in that: a plurality of ventilation pipes in the first ventilation pipe group (211), the second ventilation pipe group (212), the third ventilation pipe group (213) and the fourth ventilation pipe group (214) are arranged in a multi-layer mode, and the ventilation pipes in two adjacent layers are arranged in a staggered mode.

9. The large split indirect heat exchange type gas hot blast stove according to claim 1, characterized in that: be provided with preheating assembly (400) on blast pipe (215), preheating assembly (400) and cold wind import (224) intercommunication setting, and preheating assembly (400) are used for heating cold air.

10. The large split indirect heat exchange type gas hot blast stove according to claim 1, characterized in that: three-way joints (216) are arranged on the exhaust pipe (215) and the circulating fan (130) in a communicated mode, and the three-way joints (216) on the exhaust pipe (215) are arranged in a communicated mode with the three-way joints (216) on the circulating fan (130).