A kiln waste heat refrigeration and flue gas emission reduction integrated device

Abstract

The utility model discloses a kind of kiln waste heat refrigeration and flue gas emission reduction integrated equipment, including refrigeration device, purification device and back to furnace pipe, refrigeration device includes flue gas heat exchanger, lithium bromide water chiller and cold taking device, several flue gas passages and several hot water passages are equipped in the inside of flue gas heat exchanger, several flue gas passages are respectively adjacent with several hot water passages Setting, one end of several flue gas passages is communicated with kiln, another end is communicated with exhaust pipe, the heating side of lithium bromide water chiller is communicated with several hot water passages, the cold water side of lithium bromide water chiller is communicated with cold taking device;The purification device includes dust collector and carbon dioxide recovery device, the two sides of dust collector are respectively communicated with exhaust pipe and carbon dioxide recovery device, back to furnace pipe is communicated with exhaust pipe and kiln.The kiln waste heat refrigeration and flue gas emission reduction integrated equipment can recover the waste heat in flue gas discharged by kiln for refrigeration, and can reduce dust, carbon dioxide, nitrogen oxides emission.

Description

Technical Field

[0001] This utility model relates to limestone kiln flue gas treatment equipment technology, and in particular to an integrated equipment for kiln waste heat cooling and flue gas emission reduction. Background Technology

[0002] After calcination, the kiln produces and discharges a large amount of flue gas and heat. Taking the Mairz kiln used for limestone calcination as an example, the exhaust volume after calcination is large (usually 80,000-100,000 m³ / h). 3 The flue gas temperature is high (reaching 110-120℃). Direct emission of this flue gas not only causes significant heat loss but also generates substantial emissions (dust, sulfur dioxide, nitrogen oxides), severely polluting the environment. Industrial production processes, especially in areas requiring heat, often result in high ambient temperatures and poor working conditions, necessitating the addition of significant cooling to maintain suitable working temperatures for employees.

[0003] With increasing global environmental awareness, energy conservation and environmental protection in industrial production have received growing attention. As a crucial piece of industrial equipment, the energy consumption and emissions during the calcination process of lime kilns have always been a key research focus within the industry. Recovering harmful substances and waste heat from the high-temperature flue gas emitted by the kiln, and using the recovered waste heat for refrigeration to improve the high-temperature working environment, not only reduces the flue gas temperature and heat loss but also improves energy efficiency, achieving the goals of energy conservation and emission reduction. Utility Model Content

[0004] The main objective of this invention is to provide an integrated device for kiln waste heat cooling and flue gas emission reduction to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model proposes an integrated device for kiln waste heat cooling and flue gas emission reduction, comprising:

[0006] A refrigeration device includes a flue gas heat exchanger, a lithium bromide chiller, and a coolant. The flue gas heat exchanger has several flue gas channels and several hot water channels inside. The several hot water channels are respectively arranged adjacent to the several flue gas channels. One end of the several flue gas channels is connected to the kiln, and the other end of the several flue gas channels is connected to the exhaust pipe. The heating side of the lithium bromide chiller is connected to the several hot water channels through a first circulation pipeline, and the cooling water side of the lithium bromide chiller is connected to the coolant through a second circulation pipeline.

[0007] A purification device, comprising a dust collector and a carbon dioxide recovery unit, wherein the dust collector is connected to the plurality of flue gas passages through the exhaust pipe, and the carbon dioxide recovery unit is connected to the dust collector;

[0008] The return pipe is connected to the exhaust pipe and the kiln.

[0009] In an optional embodiment, the flue gas heat exchanger includes a shell with a flue gas inlet, a flue gas outlet, a first water outlet, and a first water inlet. The flue gas inlet connects the kiln to the plurality of flue gas channels, the flue gas outlet connects to the plurality of flue gas channels and is connected to the dust collector through the exhaust pipe, the first water outlet and the first water inlet are respectively connected to the plurality of hot water channels and respectively connected to the heating side of the lithium bromide chiller through the first circulation pipeline, the first water outlet is located at the end of the shell near the flue gas inlet, and the first water inlet is located at the end of the shell away from the flue gas inlet.

[0010] In an optional embodiment, the lithium bromide chiller unit includes a generator, a condenser, an evaporator, and an absorber. The generator is located on the heating side of the lithium bromide chiller unit, and the evaporator is located on the cooling side of the lithium bromide chiller unit. The generator has a second outlet and a second inlet. The second inlet is connected to the first outlet through a first circulation pipe, and the second outlet is connected to the first inlet through the first circulation pipe. The generator, the condenser, the evaporator, and the absorber are connected in sequence. The generator is connected to the absorber through a third circulation pipe, and the evaporator is connected to the coolant collector through a second circulation pipe.

[0011] In an optional embodiment, the lithium bromide chiller further includes a heat exchanger connected between the generator and the absorber via the third circulation pipeline.

[0012] In an optional embodiment, a heat-extracting cavity is provided inside the outer shell, and the flue gas heat extractor further includes a first partition, a second partition, a third partition, a fourth partition, a fifth partition, and a sixth partition arranged sequentially from top to bottom in the heat-extracting cavity. A first baffle and a second baffle are respectively connected to opposite sides of all the partitions, and the first baffle and the second baffle are installed on the inner wall of the outer shell.

[0013] The first partition, the second partition, the first baffle, and the second baffle form a first hot water channel; the second partition, the third partition, the first baffle, and the second baffle form a first flue gas channel; the third partition, the fourth partition, the first baffle, and the second baffle form a second hot water channel; the fourth partition, the fifth partition, the first baffle, and the second baffle form a second flue gas channel; and the fifth partition, the sixth partition, the first baffle, and the second baffle form a third hot water channel.

[0014] The first flue gas passage is provided with a first support plate that abuts against the second and third partitions, and the second flue gas passage is provided with a second support plate that abuts against the fourth and fifth partitions.

[0015] In an optional embodiment, the first partition, the second partition, the third partition, the fourth partition, the fifth partition, the sixth partition, the first support plate, and the second support plate are all non-flat.

[0016] In an optional embodiment, the flue gas heat exchanger further includes a third baffle and a fourth baffle, which are respectively disposed at both ends of all the partitions and connected to all the partitions.

[0017] In an optional embodiment, the dust collector is an electrostatic precipitator-bag filter hybrid dust collector.

[0018] In an alternative embodiment, the carbon dioxide recoverer is a calcium-based carbon storage device.

[0019] In an optional embodiment, a circulation pump is respectively installed on the first circulation pipeline and the second circulation pipeline.

[0020] This utility model has the following technical effects:

[0021] 1. This utility model's integrated kiln waste heat cooling and flue gas emission reduction equipment can recover waste heat from the flue gas emitted from the kiln for cooling; it uses a purification device to recover dust and carbon dioxide from the flue gas, reducing dust and carbon dioxide emissions; and it uses a return tube to return part of the flue gas to the kiln for recalcination, reducing nitrogen oxide emissions. The recovered waste heat is used for cooling to improve the high-temperature working environment, which not only reduces the exhaust gas temperature and heat loss, but also improves energy utilization efficiency, achieving the goal of energy conservation and emission reduction.

[0022] 2. The baffles that come into contact with the flue gas or hot circulating water are non-flat structures, which can increase the contact area between the hot circulating water and flue gas and each baffle. At the same time, they can agitate the hot circulating water or flue gas, so that the hot circulating water or flue gas can undergo sufficient heat exchange during the transportation process, thereby allowing the hot circulating water to fully absorb the waste heat in the flue gas. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1This is a schematic diagram of the structure of an integrated equipment for kiln waste heat cooling and flue gas emission reduction according to the present invention;

[0025] Figure 2 A cross-sectional view of a flue gas heat exchanger;

[0026] Figure 3 This is a structural diagram of all partitions, baffles, and support plates.

[0027] Explanation of icon numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0034] Reference Figures 1-3 This utility model proposes an integrated device 100 for kiln waste heat cooling and flue gas emission reduction.

[0035] In this embodiment of the utility model, the integrated equipment 100 for kiln waste heat cooling and flue gas emission reduction includes a cooling device 1, a purification device 2, and a return tube 3. The cooling device 1 includes a flue gas heat exchanger 11, a lithium bromide chiller 12, and a cooler 13. The flue gas heat exchanger 11 is provided with a plurality of flue gas channels 111 and a plurality of hot water channels 112. The plurality of flue gas channels 111 and the plurality of hot water channels 112 are arranged adjacent to each other so that the hot circulating water in the plurality of hot water channels can fully absorb the waste heat of the flue gas in the plurality of flue gas channels 111. One end of several flue gas passages 111 is connected to the kiln 200, and the other end of several flue gas passages 111 is connected to the exhaust pipe 4. The heating side 121 of the lithium bromide chiller unit 12 is connected to several hot water passages 112 through the first circulation pipe 122, and the cold water side 123 of the lithium bromide chiller unit 12 is connected to the cooler 13 through the second circulation pipe 124. The purification device 2 includes a dust collector 21 and a carbon dioxide recovery unit 22. The dust collector 21 is connected to several flue gas passages 111 through the exhaust pipe 4, and the carbon dioxide recovery unit 22 is connected to the dust collector 21. The return pipe 3 is connected to the exhaust pipe 4 and the kiln 200.

[0036] Specifically, the flue gas heat exchanger 11 includes a housing 113, on which a flue gas inlet 114, a flue gas outlet 115, a first water outlet 116, and a first water inlet 117 are provided. The flue gas inlet 114 connects the kiln 200 to several flue gas channels 111. The flue gas outlet 115 connects to several flue gas channels 111 and is connected to a dust collector 21 through a flue pipe 4. The first water outlet 116 and the first water inlet 117 are respectively connected to several hot water channels 112 and are respectively connected to the heating side 121 of the lithium bromide chiller unit 12 through a first circulation pipeline 122. The first water outlet 116 is located at the end of the housing 113 near the flue gas inlet 114, and the first water inlet 117 is located at the end of the housing 113 away from the flue gas inlet 114. After the hot circulating water absorbs sufficient heat at the heating side 121 of the lithium bromide chiller 12, it is cooled down and transported from the first inlet 117 (farthest from the flue gas inlet 114, near the flue gas outlet 115) to the first outlet 116 (farthest from the flue gas outlet 115), with the flue gas transport direction opposite to the hot circulating water transport direction, so that the hot circulating water is fully heated. The heated hot circulating water is then transported to the heating side 121 of the lithium bromide chiller 12, thereby realizing the circulation of hot circulating water between the heating side 121 of the lithium bromide chiller 12 and several hot water channels 112.

[0037] The lithium bromide chiller unit 12 includes a generator 125, a condenser 126, an evaporator 127, and an absorber 128. The generator 125 is located on the heating side 121 of the lithium bromide chiller unit 12, and the evaporator 127 is located on the cold water side 123 of the lithium bromide chiller unit 12. The generator 125 has a second outlet 129 and a second inlet 1210. The second inlet 1210 is connected to the first outlet 116 through a first circulation pipe 122, and the second outlet 129 is connected to the first inlet 117 through the first circulation pipe 122. The generator 125, condenser 126, evaporator 127, and absorber 128 are connected in sequence. The generator 125 is connected to the absorber 128 through a third circulation pipe 1213, and the evaporator 127 is connected to the cooler 13 through a second circulation pipe 124.

[0038] In one embodiment of this utility model, the lithium bromide chiller unit 12 further includes a heat exchanger 1211, which is connected between the generator 125 and the absorber 128 via a third circulation pipeline 1213. The cooler 13 can be a chilled water device or an air-cooled machine.

[0039] In one embodiment of this utility model, a heat-extracting cavity 118 is provided inside the outer shell 113. The flue gas heat exchanger 11 further includes a first partition 119, a second partition 1110, a third partition 1111, a fourth partition 1112, a fifth partition 1113, and a sixth partition 1114 arranged sequentially from top to bottom within the heat-extracting cavity 118. A first baffle 1115 and a second baffle 1116 are respectively connected to opposite sides of all partitions. The first baffle 1115 and the second baffle 1116 are installed on the inner wall of the outer shell 113. The flue gas heat exchanger 11 also includes a third baffle 1117 and a fourth baffle 1118, which are respectively disposed at both ends of all partitions and connected to all partitions. The third baffle 1117 and the fourth baffle 1118 are installed on the inner wall of the outer shell 113, and the first partition 119 and the sixth partition 1114 are also installed on the inner wall of the outer shell 113.

[0040] The first baffle 119, the second baffle 1110, the first baffle 1115, and the second baffle 1116 form the first hot water channel 1119. The distance between the first baffle 119 and the second baffle 1110 is 4 mm, meaning the height of the first hot water channel 1119 is 4 mm. The second baffle 1110, the third baffle 1111, the first baffle 1115, and the second baffle 1116 form the first flue gas channel 1120. The distance between the second baffle 1110 and the third baffle 1111 is 12 mm, meaning the height of the first flue gas channel 1120 is 12 mm. The third baffle 1111, the fourth baffle 1112, the first baffle 1115, and the second baffle 1116 form the second hot water channel 1121. The distance between the third baffle 1111 and the fourth baffle 1112 is 4 mm, meaning the height of the second hot water channel 1121 is 4 mm. The fourth baffle 1112, the fifth baffle 1113, the first baffle 1115, and the second baffle 1116 form the second flue gas passage 1122. The distance between the fourth baffle 1112 and the fifth baffle 1113 is 12mm, meaning the height of the second flue gas passage 1122 is 12mm. The fifth baffle 1113, the sixth baffle 1114, the first baffle 1115, and the second baffle 1116 form the third hot water passage 1123. The distance between the fifth baffle 1113 and the sixth baffle 1114 is 4mm, meaning the height of the third hot water passage 1123 is 4mm.

[0041] A first support plate 1124 is provided in the first flue gas passage 1120 to abut against the second partition 1110 and the third partition 1111, and a second support plate 1125 is provided in the second flue gas passage 1122 to abut against the fourth partition 1112 and the fifth partition 1113. In one embodiment of the present invention, the first partition 119, the second partition 1110, the third partition 1111, the fourth partition 1112, the fifth partition 1113, the sixth partition 1114, the first support plate 1124, and the second support plate 1125 are all non-flat, which can increase the contact area between the hot circulating water and flue gas and each partition, and at the same time can agitate the hot circulating water or flue gas, so that the hot circulating water or flue gas can undergo sufficient heat exchange during the transportation process, thereby allowing the hot circulating water to fully absorb the waste heat in the flue gas. In specific implementation, the first partition 119, the second partition 1110, the third partition 1111, the fourth partition 1112, the fifth partition 1113 and the sixth partition 1114 have the same structure and adopt a wave-shaped structure. The first support plate 1124 and the second support plate 1125 have the same structure and adopt a W-shaped structure.

[0042] In one embodiment of this utility model, the dust collector 21 is an electrostatic precipitator-bag filter hybrid dust collector, and the dust collected by the dust collector 21 can be reused. The carbon dioxide recovery unit 22 is a calcium-based carbon storage unit, which recovers carbon dioxide through a chemical reaction between calcium ions and carbon dioxide.

[0043] In one embodiment of this utility model, a circulation pump 1212 is respectively installed on the first circulation pipeline 122 and the second circulation pipeline 124. The two circulation pumps 1212 are used to realize the circulation of hot circulating water between several hot water channels 112 and generator 125, and the circulation of cold circulating water between evaporator 127 and cooler 13.

[0044] In a specific application of this utility model, flue gas from the kiln 200 is transported to the dust collector 21 via the flue gas inlet 114, flue gas passage 111, flue gas outlet 115, and exhaust pipe 4. The dust collector 21 collects the dust in the flue gas and then transports the flue gas to the carbon dioxide recovery unit 22. The carbon dioxide recovery unit 22 collects the carbon dioxide in the flue gas and then discharges the purified flue gas to the outside, thereby reducing the emission of dust and carbon dioxide in the flue gas.

[0045] Under the action of a circulating pump 1212, hot circulating water circulates between the flue gas heat exchanger 11 and the generator 125 through the hot water channel 112, the first outlet 116, the first circulation pipeline 122, the second inlet 1210, the second outlet 129, the first inlet 117, and the hot water channel 112. The hot circulating water absorbs part of the waste heat in the flue gas and transfers the absorbed heat to the generator 125, which then absorbs the heat from the hot circulating water.

[0046] The flue gas in flue gas passage 111 is cooled down after absorbing residual heat through hot circulating water and then transported to exhaust pipe 4. Before the cooled flue gas reaches dust collector 21, return pipe 3 transports part (preferably 40%) of the cooled flue gas back to kiln 200, where it is recalcined to reduce the calcination temperature and oxygen concentration, thereby reducing the emission concentration of nitrogen oxides.

[0047] The generator 125 absorbs heat from the hot circulating water. After the lithium bromide solution inside is heated, the water in the lithium bromide solution continuously vaporizes. The lithium bromide solution is separated into high-concentration lithium bromide and hot vapor. The high-concentration lithium bromide is transported to the absorber 128 through the third circulation pipeline 1213, and the hot vapor enters the condenser 126.

[0048] Hot steam condenses after being cooled by condenser 126, becoming high-pressure, low-temperature liquid water. This high-pressure, low-temperature liquid water rapidly expands and vaporizes upon entering evaporator 127, forming cold steam. During vaporization, it absorbs a large amount of heat from the cold circulating water (cold brine or cold water) within evaporator 127, thus lowering the temperature of the cold circulating water. The low-temperature cold circulating water, under the action of another circulation pump 1212, is then transported through a second circulation pipeline 124 to a cooler 13 (which can be directly supplied with chilled water or connected to an external air-cooled unit to supply cold air). The cold circulating water absorbs heat in the cooler 13, raising its temperature, and is then transported back to evaporator 127 through the second circulation pipeline 124, thus achieving the circulation of cold circulating water between evaporator 127 and cooler 13.

[0049] Meanwhile, when the high-pressure, low-temperature liquid water enters the evaporator 127, it expands rapidly and vaporizes to form cold steam. The cold steam enters the absorber 128 and is absorbed by the high-concentration lithium bromide in the absorber 128. The concentration of the lithium bromide solution gradually decreases, and the low-concentration lithium bromide solution is then transported back to the generator 125 through the third circulation pipeline 1213 to complete the entire cycle.

[0050] Since the low-concentration lithium bromide solution has been cooled and its temperature has decreased in the absorber 128, in order to save the heat of reheating the low-concentration lithium bromide solution and improve the thermal efficiency of the entire device, a heat exchanger 1211 is added between the generator 125 and the absorber 128. This allows the high-temperature, high-concentration lithium bromide solution delivered from the generator 125 to exchange heat with the low-temperature, low-concentration lithium bromide solution flowing out of the absorber 128, thereby increasing the temperature of the low-temperature, low-concentration lithium bromide solution and allowing it to circulate back into the generator 125 at a higher temperature.

[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An integrated device for kiln waste heat cooling and flue gas emission reduction, characterized in that, include: A refrigeration device includes a flue gas heat exchanger, a lithium bromide chiller, and a coolant. The flue gas heat exchanger has several flue gas channels and several hot water channels inside. The several hot water channels are respectively arranged adjacent to the several flue gas channels. One end of the several flue gas channels is connected to the kiln, and the other end of the several flue gas channels is connected to the exhaust pipe. The heating side of the lithium bromide chiller is connected to the several hot water channels through a first circulation pipeline, and the cooling water side of the lithium bromide chiller is connected to the coolant through a second circulation pipeline. A purification device, comprising a dust collector and a carbon dioxide recovery unit, wherein the dust collector is connected to the plurality of flue gas passages through the exhaust pipe, and the carbon dioxide recovery unit is connected to the dust collector; The return pipe is connected to the exhaust pipe and the kiln.

2. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 1, characterized in that, The flue gas heat exchanger includes a shell with a flue gas inlet, a flue gas outlet, a first water outlet, and a first water inlet. The flue gas inlet connects the kiln to the plurality of flue gas channels, and the flue gas outlet connects to the plurality of flue gas channels and is connected to the dust collector through the exhaust pipe. The first water outlet and the first water inlet are respectively connected to the plurality of hot water channels and are respectively connected to the heating side of the lithium bromide chiller through the first circulation pipeline. The first water outlet is located at the end of the shell near the flue gas inlet, and the first water inlet is located at the end of the shell away from the flue gas inlet.

3. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 2, characterized in that, The lithium bromide chiller unit includes a generator, a condenser, an evaporator, and an absorber. The generator is located on the heating side of the lithium bromide chiller unit, and the evaporator is located on the cooling side of the lithium bromide chiller unit. The generator has a second outlet and a second inlet. The second inlet is connected to the first outlet through a first circulation pipe, and the second outlet is connected to the first inlet through the first circulation pipe. The generator, the condenser, the evaporator, and the absorber are connected in sequence. The generator is connected to the absorber through a third circulation pipe, and the evaporator is connected to the coolant collector through a second circulation pipe.

4. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 3, characterized in that, The lithium bromide chiller unit also includes a heat exchanger, which is connected between the generator and the absorber via the third circulation pipeline.

5. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 4, characterized in that, The outer shell has a heat extraction chamber inside. The flue gas heat exchanger also includes a first partition, a second partition, a third partition, a fourth partition, a fifth partition, and a sixth partition arranged in the heat extraction chamber from top to bottom. Each partition has a first baffle and a second baffle connected to its opposite sides. The first baffle and the second baffle are installed on the inner wall of the outer shell. The first partition, the second partition, the first baffle, and the second baffle form a first hot water channel; the second partition, the third partition, the first baffle, and the second baffle form a first flue gas channel; the third partition, the fourth partition, the first baffle, and the second baffle form a second hot water channel; the fourth partition, the fifth partition, the first baffle, and the second baffle form a second flue gas channel; and the fifth partition, the sixth partition, the first baffle, and the second baffle form a third hot water channel. The first flue gas passage is provided with a first support plate that abuts against the second and third partitions, and the second flue gas passage is provided with a second support plate that abuts against the fourth and fifth partitions.

6. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 5, characterized in that, The first partition, the second partition, the third partition, the fourth partition, the fifth partition, the sixth partition, the first support plate, and the second support plate are all non-flat.

7. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 6, characterized in that, The flue gas heat exchanger also includes a third baffle and a fourth baffle, which are respectively disposed at both ends of all the partitions and connected to all the partitions.

8. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 7, characterized in that, The dust collector is a hybrid electrostatic precipitator and bag filter.

9. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 8, characterized in that, The carbon dioxide recovery unit is a calcium-based carbon storage unit.

10. The integrated equipment for kiln waste heat cooling and flue gas emission reduction as described in claim 9, characterized in that, A circulation pump is installed on the first circulation pipeline and the second circulation pipeline respectively.

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