Waste heat recovery system of sintering circular cooler

Abstract

The waste heat recovery system of the sintering circular cooler solves the problem that waste heat of the circular cooler is not fully recycled, a heating assembly comprises a medium-pressure heating mechanism, a low-pressure heating mechanism and a flue gas cooling tower, the medium-pressure heating mechanism and the low-pressure heating mechanism are arranged in the flue gas cooling tower, and the medium-pressure heating mechanism and the low-pressure heating mechanism are arranged in the flue gas cooling tower. The gas outlet end of the high-temperature gas channel is communicated with the interior of the flue gas cooling tower from the top end; due to the fact that the low-pressure circulating pipe and the medium-pressure circulating pipe are arranged in the heating assembly, heat is transferred between the low-pressure circulating pipe and the medium-pressure circulating pipe and the liquid, and the liquid in the low-pressure circulating pipe and the medium-pressure circulating pipe flows, the liquid takes away heat for power generation, finally, low-temperature waste heat is recycled through the gas circulating assembly and then is used for blowing, waste heat gas is recycled, and energy is saved. Therefore, the problem that the waste heat of the circular cooler is not fully recycled is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering waste heat recovery field especially relates to a kind of sintering circular cooler waste heat recovery system. BACKGROUND

[0002] Ring cooler is the necessary equipment that sintering ore is cooled, its function is to cool the high-temperature sintering ore from sintering machine, and the existing ring cooler waste heat utilization is based on ring cooler sintering ore cooling process, only involves waste heat recovery supply power generation, without involving specific heat exchange, and the temperature of waste heat gas after cooling is still relatively high, this part of gas is usually wasted. SUMMARY

[0003] The utility model aims at providing a kind of sintering circular cooler waste heat recovery system, solve the problem of insufficient ring cooler waste heat recovery.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0005] The utility model provides a kind of sintering circular cooler waste heat recovery system, including blowing assembly, flue gas recovery assembly, heating assembly and gas circulation assembly,

[0006] The blowing assembly includes high-temperature inlet pipe and high-temperature air blower, the high-temperature air blower is arranged on the high-temperature inlet pipe, and the outlet end of the high-temperature inlet pipe is used to dock the inside of ring cooler, and the inlet end of the high-temperature inlet pipe is located in normal temperature gas;

[0007] The flue gas recovery assembly includes high-temperature air duct, and the inlet end of the high-temperature air duct is used to communicate with the upper part of ring cooler;

[0008] The heating assembly includes medium-pressure heating mechanism, low-pressure heating mechanism and flue gas cooling tower, the medium-pressure heating mechanism and the low-pressure heating mechanism are arranged in the flue gas cooling tower, and the outlet end of the high-temperature air duct is used to communicate with the inside of the flue gas cooling tower from the top end;

[0009] The medium-pressure heating mechanism includes medium-pressure drum and medium-pressure circulating pipe, the medium-pressure circulating pipe passes through the medium-pressure drum, the low-pressure heating mechanism includes low-pressure drum and low-pressure circulating pipe, the inlet end of the low-pressure circulating pipe is used to communicate with condensate water source, the outlet end of the low-pressure circulating pipe is used to communicate with low-pressure steam collecting header, the inlet end of the medium-pressure circulating pipe is communicated with the inside of the low-pressure drum, and the outlet end of the medium-pressure circulating pipe is used to communicate with medium-pressure steam collecting header.

[0010] The gas circulation assembly includes recovery pipeline and circulating fan, the recovery pipeline passes through the circulating fan, and the two ends of the recovery pipeline are respectively communicated with the flue gas cooling tower and the high-temperature inlet pipe.

[0011] Optionally, the air blowing assembly further comprises a medium-temperature air inlet pipe and a medium-temperature air blower, the medium-temperature air blower is arranged on the medium-temperature air inlet pipe, the air outlet end of the high-temperature air inlet pipe is used for docking the high-temperature zone inside the ring cooler, the air outlet end of the medium-temperature air inlet pipe is used for docking the medium-temperature zone inside the ring cooler, and the air inlet end of the medium-temperature air inlet pipe is located in normal-temperature gas, and the recovery pipeline is in communication with the high-temperature air inlet pipe and the medium-temperature air inlet pipe.

[0012] Optionally, the flue gas recovery assembly further comprises a medium-temperature air duct, the air inlet end of the medium-temperature air duct is used for communicating with the medium-temperature zone on the upper part of the ring cooler, and the air inlet end of the high-temperature air duct is used for communicating with the high-temperature zone on the upper part of the ring cooler.

[0013] Optionally, the high-temperature air duct is provided with a flow meter, a valve, a thermometer and a pressure gauge.

[0014] Optionally, the high-temperature air duct comprises a first pipe, a second pipe and a contraction pipe, and the two ends of the contraction pipe are in communication with the first pipe and the second pipe respectively.

[0015] Optionally, the low-pressure heating mechanism further comprises a low-parameter heater, a low-parameter evaporator, a low-parameter superheater and a low-pressure internal circulation pipe, the low-parameter superheater and the low-parameter heater are arranged on the low-pressure circulation pipe, a low-pressure steam drum is arranged between the low-parameter superheater and the low-parameter heater, the two ports of the low-parameter evaporator are in communication with the inside of the low-pressure steam drum, and the low-parameter evaporator is arranged on the low-pressure internal circulation pipe.

[0016] Further, the medium-pressure heating mechanism further comprises a first medium-pressure economizer, a second medium-pressure economizer, a medium-pressure superheater and a medium-pressure internal circulation pipe, the first medium-pressure economizer and the medium-pressure superheater are arranged on the medium-pressure circulation pipe, a medium-pressure steam drum is arranged between the first medium-pressure economizer and the medium-pressure superheater, the two ports of the medium-pressure internal circulation pipe are in communication with the inside of the medium-pressure steam drum, and the second medium-pressure economizer is arranged on the medium-pressure internal circulation pipe.

[0017] Optionally, the flue gas cooling tower is provided with a dust collection bin at the bottom, and a dust removal valve is arranged at the bottom of the dust collection bin.

[0018] Optionally, the gas circulation assembly further comprises an adjusting valve, the adjusting valve is arranged on the flue gas cooling tower, and the air suction end of the circulating fan is docked with the air outlet of the adjusting valve.

[0019] Further, the gas circulation assembly further comprises an inlet compression pipe and an outlet compression pipe, the inlet compression pipe is in communication with the air inlet end of the circulating fan, and the outlet compression pipe is in communication with the air outlet end of the circulating fan.

[0020] Compared with the prior art, the sintering ring cooling machine waste heat recovery system has the following advantages:

[0021] The sintering ring cooling machine waste heat recovery system has the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0022] Some specific embodiments of the present application will be described in detail hereinafter with reference to the drawings, which are presented by way of illustration and not of limitation. The same reference numbers in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a structure view of a sintering ring cooling machine waste heat recovery system according to the preferred embodiment of the present application;

[0024] Figure 2 is Figure 1 is an enlarged view of the flue gas recovery assembly shown in FIG. 1;

[0025] Figure 3 is Figure 1 is an enlarged view of the heating assembly shown in FIG. 1;

[0026] Figure 4 is Figure 1 is an enlarged view of the gas circulation assembly shown in FIG. 1.

[0027] In the drawings, the reference signs are explained as follows:

[0028] 1, blowing assembly; 2, flue gas recovery assembly; 3, heating assembly; 4, gas circulation assembly; 5, annular cooler; 11, high-temperature air inlet pipe; 12, high-temperature air blower; 13, medium-temperature air inlet pipe; 14, medium-temperature air blower; 21, high-temperature air duct; 22, medium-temperature air duct; 23, flow meter; 24, valve; 25, thermometer; 26, pressure gauge; 31, medium-pressure heating mechanism; 32, low-pressure heating mechanism; 33, flue gas cooling tower; 34, dust collection bin; 35, dust removal valve; 41, recovery pipeline; 42, circulating fan; 43, regulating valve; 44, inlet compression pipe; 45, outlet compression pipe; 51, first air outlet pipe; 52, second air outlet pipe; 211, first pipeline; 212, second pipeline; 213, contraction pipe; 311, medium-pressure steam drum; 312, medium-pressure circulation pipe; 313, medium-pressure economizer; 314, medium-pressure evaporator; 315, medium-pressure superheater; 316, medium-pressure internal circulation pipe; 321, low-pressure steam drum; 322, low-pressure circulation pipe; 323, low-parameter heater; 324, low-parameter evaporator; 325, low-parameter superheater; 326, low-pressure internal circulation pipe; 327, deaerating head. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0032] For example, Figure 1 and Figure 2As shown, a sintering ring cooler waste heat recovery system includes a blowing assembly 1, a flue gas recovery assembly 2, a heating assembly 3 and a gas circulation assembly 4. The blowing assembly 1 is used to send gas to the ring cooler 5, so that the high-temperature gas in the ring cooler 5 starts to flow, and also has a cooling effect on the ring cooler 5. The flue gas recovery assembly 2 is connected to the upper part of the ring cooler 5. The high-temperature gas flows through the flue gas recovery assembly 2, and then enters the heating assembly 3. The high-temperature gas realizes heat exchange in the heating assembly 3, and the temperature of the high-temperature gas is reduced to become low-temperature gas. The low-temperature gas passes through the gas circulation assembly 4 and returns to the blowing assembly 1. The low-temperature gas is blown into the ring cooler 5 again.

[0033] The blowing assembly 1 includes a high-temperature gas inlet pipe 11 and a high-temperature air blower 12. The high-temperature air blower 12 is arranged on the high-temperature gas inlet pipe 11. The gas outlet end of the high-temperature gas inlet pipe 11 is used to connect to the inside of the ring cooler 5. The high-temperature air blower 12 is started. The high-temperature gas inlet pipe 11 is used to blow gas into the ring cooler 5. The gas inlet end of the high-temperature gas inlet pipe 11 is located in the normal-temperature gas.

[0034] The flue gas recovery assembly 2 includes a high-temperature gas channel 21. The gas inlet end of the high-temperature gas channel 21 is connected to the upper part of the ring cooler 5. When the high-temperature gas inlet pipe 11 blows gas into the ring cooler 5, the high-temperature gas in the ring cooler 5 enters the high-temperature gas channel 21, and the high-temperature gas flows in the high-temperature gas channel 21.

[0035] The heating assembly 3 includes a medium-pressure heating mechanism 31, a low-pressure heating mechanism 32 and a flue gas cooling tower 33. The medium-pressure heating mechanism 31 and the low-pressure heating mechanism 32 are arranged on the flue gas cooling tower 33. The gas outlet end of the high-temperature gas channel 21 is connected to the inside of the flue gas cooling tower 33 from the top. The high-temperature gas flows downward from the top of the flue gas cooling tower 33.

[0036] The medium-pressure heating mechanism 31 includes a medium-pressure steam drum 311 and a medium-pressure circulating pipe 312. The low-pressure heating mechanism 32 includes a low-pressure steam drum 321 and a low-pressure circulating pipe 322. The inlet end of the low-pressure circulating pipe 322 is used to connect to a condensate water source. The condensate water source is used to supply liquid to the low-pressure circulating pipe 322. The outlet end of the low-pressure circulating pipe 322 is used to connect to a low-pressure steam collecting header. The low-pressure steam collecting header collects low-temperature steam. The inlet end of the medium-pressure circulating pipe 312 is connected to the inside of the low-pressure steam drum 321. The low-pressure steam drum 321 supplies liquid to the medium-pressure circulating pipe 312. The gas outlet end of the medium-pressure circulating pipe 312 is used to connect to a medium-pressure steam collecting header. The medium-pressure steam collecting header collects high-temperature steam.

[0037] The medium-pressure circulating pipe 312 and the low-pressure circulating pipe 322 are arranged in a curved manner, and extend to the outside of the flue gas cooling tower 33. The medium-pressure circulating pipe 312 and the low-pressure circulating pipe 322 arranged outside the flue gas cooling tower 33 are provided with heat preservation measures.

[0038] The gas circulating assembly 4 comprises a recovery pipeline 41 and a circulating fan 42. The recovery pipeline 41 is communicated with the flue gas cooling tower 33 and the high-temperature gas inlet pipe 11 at two ends respectively. The recovery pipeline 41 passes through the circulating fan 42. When the circulating fan 42 is opened, the low-temperature gas, i.e. the low-temperature waste heat gas, flows in the recovery pipeline 41. At this time, the temperature of the gas is less than 145℃ and greater than 40℃. The low-temperature waste heat gas enters the high-temperature gas inlet pipe 11 again. At this time, the low-temperature waste heat gas is mixed with the normal gas in the high-temperature gas inlet pipe 11. The gas entering the ring cooler 5 is with temperature, which avoids that the temperature of the high-temperature gas is too low when entering the ring cooler 5 at the beginning.

[0039] In the system, the waste heat gas is recovered and used twice. One is to use the waste heat gas for heat exchange. The other is that the waste heat gas is cooled and then blown into the ring cooler 5 again.

[0040] The gas blowing assembly 1 further comprises a medium-temperature gas inlet pipe 13 and a medium-temperature air blower 14. The medium-temperature air blower 14 is arranged on the medium-temperature gas inlet pipe 13. Because the sintered ore comes out of the ring cooler 5 in sequence, the temperature of the first part is high, and the temperature of the latter part is lower than that of the former part. Therefore, the ring cooler 5 is divided into a high-temperature zone and a medium-temperature zone. The waste heat gas is divided into high-temperature gas and medium-temperature gas. The gas outlet end of the high-temperature gas inlet pipe 11 is connected to the high-temperature zone in the ring cooler 5. The gas outlet end of the medium-temperature gas inlet pipe 13 is connected to the medium-temperature zone in the ring cooler 5. The gas inlet end of the medium-temperature gas inlet pipe 13 is located in the normal-temperature gas. The temperature range of the high-temperature gas is 400℃-499℃. The temperature range of the medium-temperature gas is 300℃-399℃.

[0041] The recovery pipeline 41 is communicated with the high-temperature gas inlet pipe 11 and the medium-temperature gas inlet pipe 13. The recovery pipeline 41 supplies the low-temperature gas to the high-temperature gas inlet pipe 11 and the medium-temperature gas inlet pipe 13.

[0042] The flue gas recovery assembly 2 further comprises a medium-temperature gas channel 22. The gas inlet end of the medium-temperature gas channel 22 is communicated with the medium-temperature zone at the upper part of the ring cooler 5. The gas inlet end of the high-temperature gas channel 21 is communicated with the high-temperature zone at the upper part of the ring cooler 5. The gas outlet end of the medium-temperature gas channel 22 is communicated with the upper part of the flue gas cooling tower 33. The position of the gas outlet end of the medium-temperature gas channel 22 is lower than that of the gas outlet end of the high-temperature gas channel 21.

[0043] The high-temperature gas channel 21 is provided with a flow meter 23, a valve 24, a temperature meter 25 and a pressure meter 26. The flow meter 23 is used for monitoring the flow of the high-temperature gas in the high-temperature gas channel 21. The temperature meter 25 is used for monitoring the temperature in the high-temperature gas channel 21. The pressure meter 26 is used for monitoring the pressure in the high-temperature gas channel 21.

[0044] The medium-temperature gas channel 22 is also provided with a flow meter 23, a valve 24, a temperature meter 25 and a pressure meter 26. The medium-temperature gas channel 22 and the high-temperature gas channel 21 have the same structure and shape.

[0045] The high-temperature gas passage 21 comprises a first pipe 211, a second pipe 212 and a contraction pipe 213, the contraction pipe 213 is communicated with the first pipe 211 and the second pipe 212 respectively, the contraction pipe 213 can be contracted and stretched, when the high-temperature gas starts to flow in the high-temperature gas passage 21, the high-temperature gas passage 21 will expand, so the first pipe 211 and the second pipe 212 compress the contraction pipe 213, at this time, the contraction pipe 213 is in a contracted state, with the lapse of time, the high-temperature gas will be cooled down, or no more waste heat is generated, the high-temperature gas passage 21 is cooled down to a normal temperature state, the first pipe 211 and the second pipe 212 start to contract again, at this time, the first pipe 211 and the second pipe 212 stretch the contraction pipe 213, when the temperature continues to drop, the first pipe 211 and the second pipe 212 are in a contracted state, the contraction pipe 213 makes the first pipe 211 and the second pipe 212 not damaged in thermal expansion and cold contraction.

[0046] The ring cooling machine 5 has a first gas outlet pipe 51 and a second gas outlet pipe 52, the first pipe 211 is communicated with the first gas outlet pipe 51, the second gas outlet pipe 52 is communicated with the top of the flue gas cooling tower 33, the first gas outlet pipe 51 is above the high-temperature zone of the ring cooling machine 5, and the second gas outlet pipe 52 is above the medium-temperature zone of the ring cooling machine 5.

[0047] As shown in Figure 3 The low-pressure heating mechanism 32 further comprises a low-parameter heater 323, a low-parameter evaporator 324, a low-parameter superheater 325 and a low-pressure inner circulation pipe 326, the low-parameter heater 323, the low-parameter evaporator 324, the low-parameter superheater 325 and the low-pressure inner circulation pipe 326 are all arranged in the flue gas cooling tower 33, the low-parameter heater 323 and the low-parameter superheater 325 are arranged on the low-pressure circulation pipe 322, the low-pressure steam drum 321 is arranged between the low-parameter superheater 325 and the low-parameter heater 323, liquid is heated at the low-parameter heater 323, and then flows into the low-pressure steam drum 321, the liquid is heated in the process of flowing due to the waste heat gas, so that the liquid in the low-pressure steam drum 321 comprises steam and liquid, and the separation of the steam and the liquid is realized in the low-pressure steam drum 321, and the steam continues to flow along the low-pressure circulation pipe 322, and the steam at the position is saturated steam.

[0048] The saturated steam continues to flow through the low-parameter superheater 325, the low-parameter superheater 325 continues to heat, and the saturated steam generates superheated steam after passing through the low-parameter superheater 325, and finally the superheated steam flows out of the low-pressure circulation pipe 322 and enters the low-pressure steam collecting header.

[0049] The low-pressure steam drum 321 has a deaerating head 327, the liquid enters the deaerating head 327 to remove the gas therein, and then the liquid enters the low-pressure steam drum 321.

[0050] The inlet end of the medium-pressure circulating pipe 312 is communicated with the inside of the low-pressure steam drum 321, the low-parameter evaporator 324 is arranged on the low-pressure inner circulating pipe 326, and the liquid in the low-pressure steam drum 321 enters the low-pressure inner circulating pipe 326. The liquid generates saturated steam after passing through the low-parameter evaporator 324, the saturated steam contains a large amount of water, and then the saturated steam returns to the low-pressure steam drum 321. The saturated steam realizes separation of saturated steam and liquid in the low-pressure steam drum 321, so that the low-pressure steam drum 321 has two places where saturated steam converges, and the low-pressure steam drum 321 delivers liquid to the medium-pressure circulating pipe 312.

[0051] The medium-pressure heating mechanism 31 further comprises a medium-pressure economizer 313, a medium-pressure evaporator 314, a medium-pressure superheater 315 and a medium-pressure inner circulating pipe 316, the medium-pressure economizer 313, the medium-pressure evaporator 314, the medium-pressure superheater 315 and the medium-pressure inner circulating pipe 316 are arranged in the flue gas cooling tower 33, the medium-pressure economizer 313 and the medium-pressure superheater 315 are arranged on the medium-pressure circulating pipe 312, and the medium-pressure steam drum 311 is arranged between the medium-pressure economizer 313 and the medium-pressure superheater 315. Because the inlet end of the medium-pressure circulating pipe 312 is communicated with the inside of the low-pressure steam drum 321, the low-pressure steam drum 321 supplies liquid to the medium-pressure circulating pipe 312, and the liquid temperature in the medium-pressure circulating pipe 312 is continuously increased when the liquid flows in the medium-pressure circulating pipe 312.

[0052] The liquid in the medium-pressure circulating pipe 312 first passes through the medium-pressure economizer 313, the medium-pressure economizer 313 can absorb heat of high-temperature gas, so that the liquid temperature in the medium-pressure circulating pipe 312 is increased, then the liquid in the medium-pressure circulating pipe 312 enters the medium-pressure steam drum 311, the medium-pressure steam drum 311 realizes separation of steam and liquid, the steam continues to flow in the medium-pressure circulating pipe 312, at this time, the steam is saturated steam containing a large amount of water, the saturated steam flows to the medium-pressure superheater 315, and the saturated steam becomes superheated steam after being heated by the medium-pressure superheater 315, and finally flows out from the medium-pressure circulating pipe 312 into the medium-pressure steam collecting header.

[0053] The two ports of the medium-pressure inner circulating pipe 316 are communicated with the inside of the medium-pressure steam drum 311, the medium-pressure evaporator 314 is arranged on the medium-pressure inner circulating pipe 316, and separation of steam and liquid is realized in the medium-pressure steam drum 311. The liquid in the medium-pressure steam drum 311 enters the medium-pressure inner circulating pipe 316, generates saturated steam after being heated by the medium-pressure evaporator 314, returns to the medium-pressure steam drum 311, and then flows out from the medium-pressure steam drum 311. The water in the saturated steam is left in the medium-pressure steam drum 311, then the liquid enters the medium-pressure inner circulating pipe 316 again, and the medium-pressure steam drum 311 has two places where saturated steam converges.

[0054] The bottom of the flue gas cooling tower 33 is provided with a dust collection bin 34, and the bottom of the dust collection bin 34 is provided with a dust removal valve 35. When there is dust in the flue gas cooling tower 33 or on the heating assembly 3, the dust falls into the dust collection bin 34 after being removed, and the dust that comes out with the high-temperature gas also falls into the dust collection bin 34. The dust removal valve 35 is regularly opened to regularly clean the dust in the dust collection bin 34.

[0055] As shown in Figure 4 The gas circulation assembly 4 also includes an adjusting valve 43 arranged on the flue gas cooling tower 33. The suction end of the circulating fan 42 is connected to the gas outlet of the adjusting valve 43. The opening degree ratio of the adjusting valve 43 can be adjusted according to the required amount of gas in the recovery pipeline 41.

[0056] The gas circulation assembly 4 also includes an inlet compression pipe 44 and an outlet compression pipe 45. The inlet compression pipe 44 is connected to the gas inlet of the circulating fan 42, and the outlet compression pipe 45 is connected to the gas outlet of the circulating fan 42. The recovery pipeline 41 is connected to the outlet compression pipe 45. Because the gas circulation assembly 4 also expands and contracts with temperature changes, the inlet compression pipe 44 and the outlet compression pipe 45 have the characteristics of expansion and contraction. When the temperature is high, the circulating fan 42 and the recovery pipeline 41 will expand, which will compress the inlet compression pipe 44 and the outlet compression pipe 45. When the temperature is normal, the circulating fan 42 and the recovery pipeline 41 remain in a natural state. When the temperature continues to drop below the normal temperature, the circulating fan 42 and the recovery pipeline 41 will contract, which will stretch the inlet compression pipe 44 and the outlet compression pipe 45, so that the adjusting valve 43, the circulating fan 42 and the recovery pipeline 41 will not be damaged due to thermal expansion and contraction.

[0057] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A sintering ring cooler waste heat recovery system, comprising a blowing assembly (1), a flue gas recovery assembly (2), a heating assembly (3) and a gas circulation assembly (4), characterized in that, the blowing assembly (1) comprises a high-temperature air inlet pipe (11) and a high-temperature air blower (12), the high-temperature air blower (12) is arranged on the high-temperature air inlet pipe (11), the outlet end of the high-temperature air inlet pipe (11) is connected to the inside of the ring cooler, and the inlet end of the high-temperature air inlet pipe (11) is located in the normal-temperature gas; the flue gas recovery assembly (2) comprises a high-temperature gas duct (21), and the inlet end of the high-temperature gas duct (21) is used for communicating with the upper part of the ring cooler; the heating assembly (3) comprises a medium-pressure heating mechanism (31), a low-pressure heating mechanism (32) and a flue gas cooling tower (33), the medium-pressure heating mechanism (31) and the low-pressure heating mechanism (32) are arranged on the flue gas cooling tower (33), and the outlet end of the high-temperature gas duct (21) is connected to the inside of the flue gas cooling tower (33) from the top end; the medium-pressure heating mechanism (31) comprises a medium-pressure steam drum (311) and a medium-pressure circulating pipe (312), the medium-pressure circulating pipe (312) passes through the medium-pressure steam drum (311), the low-pressure heating mechanism (32) comprises a low-pressure steam drum (321) and a low-pressure circulating pipe (322), the inlet end of the low-pressure circulating pipe (322) is used for communicating with a condensate water source, the outlet end of the low-pressure circulating pipe (322) is used for communicating with a low-pressure steam collecting header, the inlet end of the medium-pressure circulating pipe (312) is communicated with the inside of the low-pressure steam drum (321), and the outlet end of the medium-pressure circulating pipe (312) is used for communicating with a medium-pressure steam collecting header; the gas circulation assembly (4) comprises a recovery pipeline (41) and a circulating fan (42), the recovery pipeline (41) passes through the circulating fan (42), and the two ends of the recovery pipeline (41) are respectively connected to the flue gas cooling tower (33) and the high-temperature air inlet pipe (11).

2. The sinter ring cooler waste heat recovery system according to claim 1, characterized by, The blowing assembly (1) further comprises a medium-temperature air inlet pipe (13) and a medium-temperature air blower (14), the medium-temperature air blower (14) is arranged on the medium-temperature air inlet pipe (13), the outlet end of the high-temperature air inlet pipe (11) is used for connecting to the high-temperature area inside the ring cooler, the outlet end of the medium-temperature air inlet pipe (13) is used for connecting to the medium-temperature area inside the ring cooler, the inlet end of the medium-temperature air inlet pipe (13) is located in the normal-temperature gas, and the recovery pipeline (41) is communicated with the high-temperature air inlet pipe (11) and the medium-temperature air inlet pipe (13) at the same time.

3. The sinter ring cooler waste heat recovery system according to claim 1, characterized in that, The flue gas recovery assembly (2) further comprises a medium-temperature gas duct (22), the inlet end of the medium-temperature gas duct (22) is used for communicating with the medium-temperature area of the upper part of the ring cooler, and the inlet end of the high-temperature gas duct (21) is used for communicating with the high-temperature area of the upper part of the ring cooler.

4. The sinter ring cooler waste heat recovery system according to claim 1, characterized in that, A flow meter (23), a valve (24), a thermometer (25) and a pressure gauge (26) are arranged on the high-temperature gas duct (21).

5. The sinter ring cooler waste heat recovery system according to claim 1, wherein The high-temperature gas passage (21) comprises a first pipe (211), a second pipe (212) and a contraction pipe (213), and the contraction pipe (213) is communicated with the first pipe (211) and the second pipe (212) at two ends respectively.

6. The sinter ring cooler waste heat recovery system as claimed in claim 1, wherein, The low-pressure heating mechanism (32) further comprises a low-parameter heater (323), a low-parameter evaporator (324), a low-parameter superheater (325) and a low-pressure inner circulation pipe (326), the low-parameter superheater (325) and the low-parameter heater (323) are arranged on the low-pressure circulation pipe (322), the low-pressure steam drum (321) is arranged between the low-parameter superheater (325) and the low-parameter heater (323), the low-parameter evaporator (324) is communicated with the inside of the low-pressure steam drum (321) at two ports, and the low-parameter evaporator (324) is arranged on the low-pressure inner circulation pipe (326).

7. The sinter ring cooler waste heat recovery system according to claim 6, wherein The medium-pressure heating mechanism (31) further comprises a medium-pressure economizer (313), a medium-pressure evaporator (314), a medium-pressure superheater (315) and a medium-pressure inner circulation pipe (316), the medium-pressure economizer (313) and the medium-pressure superheater (315) are arranged on the medium-pressure circulation pipe (312), the medium-pressure steam drum (311) is arranged between the medium-pressure economizer (313) and the medium-pressure superheater (315), the medium-pressure inner circulation pipe (316) is communicated with the inside of the medium-pressure steam drum (311) at two ports, and the medium-pressure evaporator (314) is arranged on the medium-pressure inner circulation pipe (316).

8. The sinter ring cooler waste heat recovery system as claimed in claim 1, wherein, The flue gas cooling tower (33) is provided with a dust collection bin (34) at the bottom, and the dust collection bin (34) is provided with a dust removal valve (35) at the bottom.

9. The sinter ring cooler waste heat recovery system as claimed in claim 1, wherein, The gas circulation assembly (4) further comprises an adjusting valve (43), the adjusting valve (43) is arranged on the flue gas cooling tower (33), and the air suction end of the circulating fan (42) is connected to the air outlet of the adjusting valve (43).

10. The sinter ring cooler waste heat recovery system according to claim 9, wherein, The gas circulation assembly (4) further comprises an inlet compression pipe (44) and an outlet compression pipe (45), the inlet compression pipe (44) is communicated with the air suction end of the circulating fan (42), and the outlet compression pipe (45) is communicated with the air outlet end of the circulating fan (42).

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