WO2022252156A1

WO2022252156A1 - Sintering apparatus and sintering process production device

Info

Publication number: WO2022252156A1
Application number: PCT/CN2021/097985
Authority: WO
Inventors: 高彦; 朱明�
Original assignee: 秦皇岛新特科技有限公司
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-12-08

Abstract

Disclosed are a sintering apparatus and a sintering process production device. The sintering apparatus comprises: a transport mechanism used to convey a sintering material, an air suction mechanism disposed below the transport mechanism, and an ignition mechanism used to ignite the sintering material; the apparatus further comprises a reaction cover, the reaction cover being coveringly disposed above the transport mechanism, a reaction space in which a medium reacts with ignited sintering material being formed between the reaction cover and the transport mechanism, a medium adding port for adding a medium being disposed on the reaction cover, and the medium adding port being in communication with the reaction space. The sintering apparatus of the present invention, by means of providing a reaction cover which can form a reaction space together with the transport mechanism, prevents a medium and combustion products of the medium from leaking out. In addition, during combustion of the medium, combustion products fill the reaction cover such that gas distribution is more uniform, improving a reaction effect of removing pollutants.

Description

Sintering device and sintering process production equipment

technical field

The invention relates to the technical field of clinker production technology and equipment, in particular to a sintering device and sintering process production equipment.

Background technique

Nitrogen oxides are one of the main sources of air pollution. There are many kinds of nitrogen oxides NO _x : N ₂ O, NO, NO ₂ , N ₂ O ₃ , N ₂ O ₄ and N ₂ O ₅ , among which NO and NO ₂ are important air pollutants.

In the existing sintering process, there are sulfur dioxide, carbon monoxide, dioxin, carbon dioxide, excessive water vapor and solid particles among the pollutants generated during the production process. These pollutants are easy to form acid mist and alkali mist after entering the atmosphere.

The existing nitrogen oxide purification technologies mainly include: SNCR, SCR, activated carbon (coke) and oxidation method. Among them, SNCR, SCR, and activated carbon (coke) methods all have the problem of ammonia escape. The SNCR method has the problems of high flue gas temperature requirements and low reaction efficiency. SCR will inevitably generate solid waste. For some areas, a large amount of solid waste cannot be digested and treated; the catalyst used in the SCR method is in the After the service life expires, most of them are hazardous wastes, and it will be difficult to recycle them at that time; due to factors such as flue gas temperature, the activated carbon (coke) method has certain potential safety hazards when the operation and operation are not properly managed; the oxidation method only converts NO Oxidized to NO ₂ , the absorption efficiency of lye is low, and there is a problem of false denitrification. Moreover, this method also produces a large amount of desulfurization and denitrification solid waste, which is difficult for most enterprises to handle. Moreover, the current SNCR, SCR, activated carbon (coke) and oxidation methods are still unable to co-manage these pollutants, and it is imminent to find a green multi-pollutant co-management technology.

Although, in some existing sintering processes, specific reaction media can be introduced into the sintering material to achieve desulfurization and denitrification of flue gas, but due to the open structure above the sintering trolley, these media are easy to leak after being introduced into the sintering material , unable to control the amount of flux, resulting in poor removal of pollutants, and easy to cause both pollution.

Contents of the invention

The invention discloses a sintering device and a sintering process production equipment, which solves the problem of the removal of pollutants due to the open structure above the sintering trolley, and the reaction medium is easily leaked after being passed into the sintering material, and the amount cannot be controlled. Poor, and it is easy to cause pollution of both.

According to one aspect of the present invention, a sintering device is disclosed, including a transport mechanism for transporting sintering materials, and further comprising: a reaction cover, the reaction cover is arranged above the transport mechanism, and the reaction cover is connected to the The transportation mechanism encloses a reaction space, and a medium addition port for adding a medium is opened on the reaction cover, and the medium addition port communicates with the reaction space.

Further, the medium addition port is located near the top of the reaction hood.

Further, the reaction hood is provided with a valve for controlling the amount of medium added.

Further, the medium addition port is used for introducing flue gas.

Further, the sintering device also includes: a draft mechanism, which is arranged under the transportation mechanism; an ignition mechanism, which is used to ignite and burn the briquette; a first flue gas circulation pipeline, the first The first end of the flue gas circulation pipeline communicates with the sintering flue outlet of the exhaust mechanism, the second end of the first flue gas circulation pipeline communicates with the medium addition port, and part of the smoke generated by the sintering material The gas is circulated into the reaction hood through the first flue gas circulation pipeline.

Further, the flue gas includes one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, carbon monoxide, and dioxins.

Further, the reaction hood is also provided with an external flue gas addition port for introducing external flue gas.

Further, the sintering device further includes: a medium adding mechanism, the discharge port of the medium adding mechanism communicates with the medium adding port, the medium adding mechanism is used to spray reducing medium to the sintering material, and the medium adding mechanism The output reducing medium reacts with the nitrogen oxides in the flue gas or with the carbon in the sintered material to generate a reducing agent and release heat.

Further, the transportation mechanism is a sintering trolley, and the sintering material is arranged in the sintering trolley, and the sintering material burns during the movement of the sintering trolley to form a burnt layer and a burning layer distributed from top to bottom. and the sintered material layer, the medium reacts with the burned layer and the sintered material layer after passing through the burned layer and releases heat.

Further, the medium adding mechanism transports the medium above the burnt layer of the sintered material, and the medium is sucked into the interior of the sintered material and the carbon in the burning layer and the sintered material layer by the ventilation mechanism. Contact should generate flammable gas, which will undergo oxidation reaction and release heat.

Further, the air extraction mechanism includes a fan, a plurality of sintering air boxes and a sintering flue, all the sintering air boxes are arranged under the transportation mechanism, and all the sintering air boxes are connected to the sintering flue, the The fan is arranged on the sintering flue.

Further, the sintered wind box includes: a wind box body, which has an inner cavity for collecting smoke, and a smoke inlet connected to the inner cavity is arranged on the wind box body; a reactor, the reaction The reactor has a purification chamber, and the reactor also has a smoke exhaust port communicating with the purification chamber, the purification chamber communicates with the inner chamber, and the purification chamber is used to purify the flue gas in the inner chamber.

According to another aspect of the present invention, a sintering process production equipment is also disclosed, including the above-mentioned sintering device.

Further, the sintering device has a sintering flue outlet, and the sintering process production equipment also includes: a flue gas purification pipeline, and the flue gas purification pipeline includes correspondingly arranged flue gas heating inlets and flue gas heating outlets, so The flue gas heating inlet communicates with the sintering flue outlet; the sintering material cooling device is arranged between the flue gas heating inlet and the flue gas heating outlet, and the flue gas generated by the sintering device passes through the The flue gas heating inlet enters the sintering material cooling device, the flue gas cools the burned sintering material, and at the same time, the burned sintering material heats the passing flue gas, and the heated flue gas enters the flue gas heating outlet ; The tail reactor, the tail reactor communicates with the flue gas heating outlet through a pipeline, and the tail reactor is used for purifying the heated flue gas.

Further, the sintering material cooling device includes a cooling zone, the flue gas heating inlet is located below the cooling zone, and the flue gas heating outlet is located above the cooling zone.

Further, the sintering process production equipment also includes: a second flue gas circulation pipeline, the first end of the second flue gas circulation pipeline is connected to the flue gas outlet of the tail reactor and/or the flue gas The heating outlet is communicated, and the second end of the second flue gas circulation pipeline is communicated with the medium addition port of the reaction hood.

Further, the sintering device further includes: a first flue gas circulation pipeline, the first end of the first flue gas circulation pipeline communicates with the sintering flue outlet of the draft mechanism, and the first flue gas circulation The second end of the pipeline communicates with the inside of the reaction hood, and part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline into the reaction hood.

Further, the flue gas contains one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, carbon monoxide, and dioxins.

Further, the cooling zone includes a first cooling zone and a second cooling zone, the temperature of the second cooling zone is higher than the temperature of the first cooling zone; the flue gas purification pipeline also includes a secondary heating pipeline , the secondary heating pipeline includes a secondary heating inlet and a secondary heating outlet, the secondary heating inlet is located above the first cooling zone, and the secondary heating outlet is located below the second cooling zone; The flue gas heating inlet is located below the first cooling zone, and the flue gas heating outlet is located above the second cooling zone.

Further, the secondary heating pipeline is provided with a catalyst adding device and/or a reducing agent adding device.

Further, the sintering process production equipment also includes: a second flue gas circulation pipeline, the first end of the second flue gas circulation pipeline is connected to the flue gas outlet of the tail reactor and/or the flue gas The heating outlet is in communication, and the second end of the second flue gas circulation pipeline is in communication with the inside of the reaction hood.

The sintering device of the present invention can cooperate with the transport mechanism to form a reaction space by setting a reaction hood to prevent the leakage of the medium and the products of the medium combustion. At the same time, during the combustion of the medium, the combustion products can fill the inside of the reaction hood to make the gas distribution more uniform. , Improve the reaction effect of desulfurization and denitrification.

Description of drawings

Fig. 1 is a schematic structural view of a sintering device according to Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of a sintering device according to Embodiment 2 of the present invention;

Fig. 3 is a schematic structural view of the exhaust mechanism of the sintering device according to Embodiment 1 of the present invention;

Fig. 4 is the schematic structural view of the sintering process production equipment of the third embodiment of the present invention;

5 is a schematic structural view of the sintering process production equipment of Embodiment 4 of the present invention;

6 is a schematic structural view of the sintering process production equipment of Embodiment 5 of the present invention;

7 is a schematic structural view of the sintering process production equipment of Embodiment 6 of the present invention;

Fig. 8 is a schematic structural view of the sintering process production equipment of Embodiment 7 of the present invention;

Fig. 9 is a schematic structural view of the sintering process production equipment of the eighth embodiment of the present invention;

10 is a schematic structural view of the sintering material cooling device of the sintering process production equipment of the third embodiment of the present invention;

Fig. 11 is a schematic structural view of the sintering process production equipment of Embodiment 9 of the present invention;

Fig. 12 is a schematic structural view of the sintering process production equipment of Embodiment 10 of the present invention;

Fig. 13 is a schematic structural view of the sintering process production equipment of the eleventh embodiment of the present invention;

Fig. 14 is a schematic structural view of the sintering process production equipment of Embodiment 12 of the present invention;

Legend: 10, sintering device; 11, reaction hood; 111, medium addition port; 112, valve; 113, external flue gas addition port; 12, transport mechanism; 13, exhaust mechanism; 131, bellows body; 1311, inner cavity; 132. Reactor; 1321. Shell; 1322. Clean chamber; 1323. Smoke outlet; 1324. Support; 1325. Purification layer; 133. Sintering flue; 1331. Sintering flue outlet 14. Ignition mechanism; 15. 1. Flue gas circulation pipeline; 20. Flue gas purification pipeline; 21. Flue gas heating inlet; 22. Flue gas heating outlet; 23. Secondary heating pipeline; 231. Secondary heating inlet; 232. Secondary heating outlet ; 30, sintering material cooling device; 31, cooling zone; 311, the first cooling zone; 312, the second cooling zone; 32, bearing platform; 33, fan;

Detailed ways

The present invention will be further described below in conjunction with embodiment, but is not limited to the content on the description.

Embodiment 1 shown in Figure 1, the present invention discloses a sintering device, including a reaction hood 11, a transportation mechanism 12 for transporting sintering material, an air draft mechanism 13 arranged below the transportation mechanism 12, and a sintering mechanism for igniting the sintering material The ignition mechanism 14, the reaction cover 11 cover is arranged on the top and/or side of the transport mechanism 12, the reaction cover 11 and the transport mechanism 12 enclose the reaction space where the medium reacts with the ignited sintering material, and the reaction cover 11 is provided with a A medium addition port 111 for adding a medium, and the medium addition port 111 communicates with the reaction space. During sintering production, the medium is sprayed on the surface of the binder material through the medium addition port 111. The medium can be burned above the sintered material to generate combustion products or the medium itself is the combustion product after burning in other places, and then under the action of the exhaust mechanism, the The combustion products are inhaled into the sintering material. Under the temperature conditions of the sintering material, the combustion products and the components in the sintering material undergo oxidation-reduction reactions, and the combustion products are reduced to a reducing medium with reducing properties, such as carbon dioxide in the combustion products and sintering. The carbon in the raw material reacts to form carbon monoxide, and the water vapor or water in the combustion product reacts with the carbon in the sintered material to generate hydrogen, which can effectively adjust the reducing atmosphere inside the sintered material. At the same time, the reducing medium can convert nitrogen The oxides are reduced to nitrogen, thereby reducing the emission of nitrogen oxides, and the cost is low.

The sintering device of the present invention can cooperate with the transport mechanism to form a reaction space by setting a reaction hood to prevent the leakage of the medium and the products of the medium combustion. Uniform, improve the removal effect of pollutants.

In the above-mentioned embodiments, the medium addition port 111 is located at the upper middle or side of the reaction hood 11, and the bottom of the reaction hood 11 and the transportation mechanism 12 can be sealed, or a ventilation mechanism 13 can be used to form an internal reaction hood 11. A micro-negative pressure environment to prevent leakage of flue gas. By setting the medium addition port on the middle and upper part of the reaction cover 11, the height of the medium addition can be improved, the reduction medium can be sprayed conveniently, the diffusion of the medium is more conducive, the reaction efficiency is improved, and the waste of the reduction medium is reduced; by connecting the reaction cover 11 with The transportation mechanism 12 is sealed or a slightly negative pressure environment is formed inside the reaction hood 11 through the exhaust mechanism 13, which can more effectively prevent the flue gas from escaping and improve the effect of desulfurization and denitrification.

Further, the reaction hood 11 is provided with a valve 112 for controlling the amount of medium added, so as to effectively control the combustion atmosphere of the sintering material, such as oxygen content and temperature, and to suppress the generation of nitrogen oxides.

Furthermore, the medium addition port 111 is used to introduce flue gas, which can be external flue gas, such as: flue gas from ironmaking, boiler combustion, etc., or flue gas generated by the sintering device 10 itself. Or a mixture of the two.

The dioxins in the external flue gas are decomposed in the high-temperature section of the sintering process, and the carbon monoxide undergoes an oxidation reaction near the combustion layer, which can reduce nitrogen oxides or react with other oxides to provide heat for the sintering material layer. The sulfur dioxide in the external flue gas is adsorbed or reduced to elemental sulfur when passing through the sinter bed.

In the second embodiment shown in FIG. 2 , the flue gas generated by the sintering device 10 itself is used as an example. In this embodiment, the sintering device 10 further includes a first flue gas circulation pipeline 15, the first end of the first flue gas circulation pipeline 15 communicates with the sintering flue outlet 1331 of the draft mechanism 13, and the first flue gas circulation pipe The second end of the path 15 communicates with the medium addition port 111 , and part of the flue gas generated by the sintering material passes through the first flue gas circulation line 15 into the reaction hood 11 .

During the combustion process of the sintering material in the sintering device 10, the generated flue gas (mainly including one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, and dioxins) is sucked away by the exhaust mechanism 13 , part of the flue gas returns to the reaction hood 11 through the circulation pipeline, and the other part of the flue gas is discharged through the chimney. The carbon dioxide and water vapor in the flue gas react with the carbon element in the carbon additive in the sintering material near the sintering combustion layer. Generate carbon monoxide, hydrogen and other reducing gases, forming a reducing atmosphere near the sintering combustion layer. To ensure the treatment of nitrogen oxides and achieve the purpose of denitrification of sintering flue gas, the specific chemical equation of the reaction between carbon and combustion products is as follows:

C+H ₂ O(g)→CO+H ₂ ;

C+CO ₂ →CO.

It should be noted that carbon additives refer to materials that can directly or indirectly make sintered materials form carbon-containing mixtures, such as coke powder, biomass, coal, carbon powder, etc. The oxygen in the circulating flue gas can also be used as a combustion aid. By increasing the combustion aid, the reaction efficiency can be improved and the production of nitrogen oxides can be further reduced.

The generated carbon monoxide and hydrogen can reduce nitrogen oxides and sulfides. The nitrogen oxides in the flue gas introduced into the sintering material layer are reduced to nitrogen in the reducing gas near the sintering combustion layer. The nitrogen oxides produced by the sintering material combustion It is also reduced to nitrogen. The sulfur dioxide introduced into the flue gas of the sinter bed is adsorbed by the sinter and/or reduced to elemental sulfur. The monoxide in the flue gas introduced into the sinter bed is oxidized to carbon dioxide. The dioxins introduced into the sinter bed are pyrolyzed when passing through the sinter bed.

The flue gas is introduced into the reaction hood 11 through the medium addition port, which effectively overcomes the problem in the prior art that the by-products produced after denitrification need to be treated, and avoids further environmental pollution such as leakage of ammonia or ozone.

In the first embodiment shown in Figure 1, the sintering device 10 also includes a medium addition mechanism, the outlet of the medium agent addition mechanism communicates with the medium addition port 111, the medium addition mechanism is used to spray the reducing medium to the sintering material, and the medium addition mechanism The output reducing medium and sintering material deflagrate.

The medium output by the medium adding mechanism contacts and deflagrates with the sintered material ignited by the ignition mechanism 14, and the ignition mechanism 14 ignites the sintered material, and under the action of the exhaust mechanism 13, the sintered material burns from top to bottom and heats up. At the same time, the transportation mechanism 12 drives the burning sintering material to move to the medium adding mechanism. When the burning sintering material moves below the reaction cover 11, the medium adding mechanism adds the medium to the sintering material so that the medium is in contact with the sintering material, and at the same time the medium is sintered. Deflagration is caused by the influence of the temperature of the material.

The medium includes materials and/or combustible substances that chemically react with carbon additives in the sintered material and/or combustible substances, that is, the medium can produce flammable substances for chemical reactions with coal and/or coke powder and biomass in the sintered material Any material of a substance, which can be one material or a mixture of multiple materials, and the medium can also be a mixture of a material and a flammable substance, or a mixture of a single flammable substance, such as a variety of flammable gases Mixing, flammable gas and flammable liquid mixing etc. can all realize the purpose of the present invention.

In the above embodiments, the medium includes one or more of the following substances: carbon monoxide, methane, propane, acetylene, hydrogen, methanol, ethanol, gas, natural gas, gasoline, heavy oil, coal powder, charcoal, coke, wood chips, hydrogen sulfide, Hydrogen cyanide, phosgene, n-butane, n-hexane, n-heptane, n-pentane, propanol, methyl ethyl ketone, vinyl acetate, silane, cyclohexane, hydrogen chloride, butyne, liquefied petroleum gas, petroleum gas, ether, toluene , benzene, acetone, propyne, ethylene, propylene, butene, butane, coal water slurry, coke, wood chips and other combustible substances, or water and water vapor that can decompose hydrogen at high temperature, and hydrogen can oxidize oxidants or nitrogen undergo a reduction reaction. In addition, the medium can also be carbon dioxide, which can react with the carbon in coke and wood chips at high temperature to form carbon monoxide.

The medium can be water or water vapor. The liquid water is affected by the temperature of the sintered material into water vapor. The water vapor reacts with the coal or coke powder in the sintered material to generate combustible gases (carbon monoxide and hydrogen). Carbon monoxide and hydrogen can reduce the smoke Nitrogen oxides and sulfides in the gas undergo oxidation-reduction reactions to generate water, carbon dioxide, nitrogen, sulfur, etc., and high temperature will decompose dioxins, thereby removing pollutants in the flue gas.

The reductant that adopts in the present invention can be a kind of in above-mentioned material, also can be the mixture of multiple above-mentioned materials, as multiple gas mixing, solid mixing, gas and liquid mixing etc. all can realize, and these mixture cost are all very low. Inexpensive and non-polluting.

The medium also includes a combustion oxidant including one or more of oxygen, air, or recycled exhaust gas.

Compared with the technical scheme of using ammonia, urea or ozone to denitrify nitrogen oxides in the prior art, not only can the cost be effectively reduced, but also only carbon dioxide, carbon dioxide, and The components that already exist in the air, such as nitrogen and water vapor, can be directly discharged without further treatment, which effectively overcomes the problem in the prior art that the by-products produced after denitrification need to be treated, and at the same time avoids ammonia or ozone leakage, etc. polluted environment.

In the above-mentioned embodiment, the transportation mechanism 12 is a sintering trolley, and the sintering material is placed in the sintering trolley, and the sintering material burns during the movement of the sintering trolley to form a burnt layer, a combustion layer and a sintered layer distributed from top to bottom. Material layer, after the medium passes through the burned layer, it reacts with the burning layer and the sintered material layer to deflagrate, that is, deflagration is formed inside the sintered material, and the interior of the sintered material can form a relatively closed space, so that when the medium is in contact with the sintered material. Most of the high temperature and high pressure act on the sintered material, increasing the effect of deflagration.

The medium adding mechanism is arranged inside the reaction hood 11 to spray the medium above the burned layer of the sintered material, and the medium is sucked into the sintered material by the exhaust mechanism 13 and deflagrates in contact with the burning layer and the sintered material layer to ensure the deflagration effect.

There is a first set distance between the ignition mechanism 14 and the reaction cover 11, and roughly forms a burned layer, a burning layer and a sintered material layer, and reacts at the moment when the medium enters the sintered material and contacts the burning layer and the sintered material layer Or directly deflagrate to generate flammable gas, provide heat for the sintering material layer, increase the sintering reaction rate, reduce the sintering process time as much as possible, make the deflagration form high temperature and high pressure in a short time, make the sintering material layer temperature increase rapidly, and produce a large amount of liquid After the liquid phase is cooled to the solid phase, it can effectively improve the particle size composition of the sinter and improve the quality of the sinter, and can greatly reduce the sintering time, thereby improving the sintering output and quality.

Further, the exhaust mechanism 13 includes a fan, a plurality of sintering bellows and a sintering flue 133, all the sintering bellows are arranged under the transport mechanism 12, and all the sintering bellows are connected with the sintering flue 133, and the fans are arranged on the sintering flue 133 , The fan can discharge the exhaust gas during the combustion process of the sintering material, and can also suck the medium into the sintering material for deflagration.

As shown in Figure 3, further, the sintered wind box includes a wind box body 131 and a reactor 132, the wind box body 131 has an inner cavity 1311 for collecting flue gas, and the bellows body 131 is also provided with a smoke inlet communicating with the inner cavity 1311 The reactor 132 has a purification chamber 1322, and the reactor 132 also has a smoke outlet 1323 communicating with the purification chamber 1322. The purification chamber 1322 communicates with the inner chamber 1311, and the purification chamber 1322 is used to purify the flue gas in the inner chamber 1311. The flue gas is collected into the inner cavity 1311 through the bellows body 131, and the flue gas is purified for the first time through the reactor 132 communicated with the inner cavity 1311, thereby reducing harmful substances in the flue gas and reducing the pressure of the back-end purification process , improve the purification effect.

The reactor 132 includes a shell 1321 and a support 1324. A clean chamber 1322 is formed in the shell 1321. A smoke outlet 1323 is provided on the shell 1321. The support 1324 is arranged in the clean chamber 1322. A flow structure, the support 1324 is provided with a purification layer 1325 for reacting with flue gas. By setting the flow structure on the support member 1324, the flue gas is guided by the flow structure and reacts with the purification layer 1325, thereby achieving a purification effect.

Preferably, the reactor 132 is a desulfurization and denitrification reactor, and the purification layer 1325 includes alkaline mineral materials or substances capable of reacting with or catalyzing the reaction of sulfur and nitrogen oxides in the flue gas. The purification layer 1325 can chemically react with the substances in the flue gas, especially alkaline substances, nitrogen oxides and sulfides in the flue gas at a certain temperature, thereby reducing the concentration of _NOx and sulfides in the flue gas content, so as to effectively reduce the cost of equipment under the premise of ensuring that the NO _x and sulfide content in the final flue gas reaches the standard.

The support member 1324 is an orifice plate, and the flow-passing structure is an air hole on the orifice plate. The orifice plate is used as the support, and the air holes on the orifice plate are used to guide the flue gas to react with the substances in the purification layer, so as to achieve the purpose of purifying the flue gas. The support member 1324 can also be a screen, and the flow-passing structure is a mesh of the screen. The screen is used as the support, because the sieve hole is small, the flow rate of the flue gas can be reduced, the time for the flue gas to pass through the purification layer is prolonged, and it can fully react with the purification layer to improve the purification effect, and the small sieve hole can play a role The role of dust removal.

In the above-mentioned embodiment, the smoke outlet 1323 is arranged below the support member 1324, and the support member 1324 is rotatable relative to the inner wall of the purification chamber 1322, and the support member 1324 can separate the purified purification layer 1325 from the support member 1324 by rotating, and Exhausted from the smoke exhaust port 1323. By making the support member 1324 rotatable relative to the inner wall of the purification chamber 1322, when the purification material of the purification layer needs to be replaced, the purified purification layer 1325 can be separated from the support member 1324 by rotating the support member 1324, and can be removed from the smoke exhaust port 1323 discharge to facilitate the replacement and cleaning of the reactor 132. In order to further facilitate the replacement process, a hatch for replacing the purification layer 1325 is also provided on the casing 1321.

In this embodiment, the sintering device adopts a belt-type sintering machine, of course, the sintering device can also adopt other sintering machines, for example, an on-machine cooling sintering machine.

According to the third embodiment of the present invention, a sintering process production equipment is also disclosed, including the above-mentioned sintering device.

As shown in Figure 4, in this embodiment, the sintering device 10 has a sintering flue outlet 1331, and the sintering process production equipment also includes a flue gas purification pipeline 20, a sintering material cooling device 30 and a tail reactor 40, and the flue gas purification pipe The road 20 includes a corresponding flue gas heating inlet 21 and a flue gas heating outlet 22, the flue gas heating inlet 21 communicates with the sintering flue outlet 1331; the sintering material cooling device 30 is arranged between the flue gas heating inlet 21 and the flue gas heating outlet 22 During the period, the flue gas generated by the sintering device 10 enters the sintering material cooling device 30 through the flue gas heating inlet 21, and the flue gas cools the burned sintering material, and at the same time, the burned sintering material heats the passing flue gas, in order to enhance The denitrification effect can be achieved by spraying reducing media such as carbon monoxide, hydrogen, urea, ammonia, etc. when the flue gas enters the sintering material cooling device 30, and the reducing medium is oxidized and reduced with the nitrogen oxides in the flue gas under the heating of the sintering material React to generate nitrogen, water and carbon dioxide, thereby enhancing the denitrification effect. The heated flue gas enters the flue gas heating outlet 22; the tail reactor 40 communicates with the flue gas heating outlet 22 through a pipeline, and the tail reactor 40 is used to purify the heated flue gas (mainly dust removal) and waste heat recovery .

By setting the flue gas purification pipeline 20 and the tail reactor 40, after being guided by the flue gas purification pipeline 20, the flue gas of the sintering material is exchanged with the high-temperature sintering material to be cooled. While cooling the high-temperature sintering material, the high-temperature The sintering material also heats the flue gas, and then purifies the heated flue gas through the tail reactor 40, without adding additional heating equipment to heat the flue gas, thereby reducing costs, improving purification effect and energy utilization rate.

It should be noted that after the flue gas enters the exhaust mechanism 13 of the sintering device 10, it passes through the sintering flue, the head dust removal device, the sintering fan, the desulfurization tower, the induced draft fan, and then enters the flue gas heating inlet 21, and passes through the sintering material cooling device 30. The blower cooler installed above enters the flue gas heating outlet 22, and finally enters the dust removal device and is discharged from the chimney under the action of the fan downstream of the dust removal device.

In this embodiment, the sintering material cooling device 30 includes a cooling zone 31 , the flue gas heating inlet 21 is located below the cooling zone 31 , and the flue gas heating outlet 22 is located above the cooling zone 31 . By setting the flue gas heating inlet 21 and the flue gas heating outlet 22 respectively above and below the cooling zone 31, the low-temperature flue gas can be heated more fully after entering the cooling zone 31, and after the heated flue gas rises, it can directly The flue gas enters the tail reactor 40 for purification through the flue gas heating outlet 22 above the cooling zone 31 , so a good reaction temperature can be ensured and the flue gas purification effect can be improved. In addition, the cooling zone 31 can also purify carbon monoxide, nitrogen oxides, dioxins, and white smoke plumes in the flue gas when the flue gas passes through. Under the catalysis of sinter, carbon monoxide can reduce nitrogen oxides, and carbon monoxide can also react with oxygen to generate carbon dioxide, and carbon monoxide can also react with iron oxides to generate low-priced iron oxides, even elemental iron , while releasing heat. Dioxin is decomposed when passing through the high-temperature sinter, and the white plume is mainly formed by water vapor. When the temperature of the smoke increases, the white plume disappears. At the same time, the water vapor in the flue gas accelerates the cooling process of the sinter. In order to enhance the denitration effect, when the flue gas enters the cooling zone 31, a reducing medium, such as carbon monoxide, hydrogen, urea, ammonia, etc., can be sprayed, and the reducing medium will undergo redox with the nitrogen oxides in the flue gas under the heating of the sintering material. React to generate nitrogen, water and carbon dioxide, thereby enhancing the denitrification effect.

Embodiment 4 shown in FIG. 5 also discloses a sintering process production equipment. The difference from Embodiment 3 is that in this embodiment, the sintering process production equipment also includes a second flue gas circulation pipeline 50, the second The first end of the second flue gas circulation pipeline 50 communicates with the flue gas outlet of the tail reactor 40 , and the second end of the second flue gas circulation pipeline 50 communicates with the medium addition port 111 of the reaction hood 11 . The flue gas purified by the tail reactor 40 includes a large amount of carbon dioxide, water vapor, water, part of the flue gas returns to the reaction hood 11 through the second flue gas circulation pipeline 50, and the other part of the flue gas is discharged through the chimney. Carbon dioxide and water vapor react with the carbon element in the carbon additive in the sintering material near the sintering combustion layer to generate a large amount of reducing gases such as carbon monoxide and hydrogen, forming a reducing atmosphere near the sintering combustion layer. To ensure the treatment of nitrogen oxides and achieve the purpose of denitrification of sintering flue gas, the specific chemical equation of the reaction between carbon and combustion products is as follows:

C+H ₂ O(g)→CO+H ₂ ;

C+CO ₂ →CO.

It should be noted that the first end of the second flue gas circulation pipeline 50 can not only communicate with the flue gas outlet of the tail reactor 40, but also communicate with the flue gas heating outlet (22), or communicate with both connected.

It should also be noted that carbon additives refer to materials that can directly or indirectly make sintered materials form carbon-containing mixtures, such as coke powder, biomass, coal, carbon powder, etc. The oxygen in the circulating flue gas can also be used as a combustion aid. By increasing the combustion aid, the reaction efficiency can be improved and the production of nitrogen oxides can be further reduced.

The flue gas is introduced into the reaction hood 11 through the medium addition port, which effectively overcomes the problem in the prior art that the by-products produced after denitrification need to be processed, and at the same time avoids further environmental pollution such as leakage of ammonia or ozone. As shown in Figure 6, it is Embodiment 5 of the present invention. This embodiment is based on Embodiment 4. The sintering device also includes a first flue gas circulation pipeline 15, and the first end of the first flue gas circulation pipeline 15 It communicates with the sintering flue outlet 1331 of the exhaust mechanism 13, and the second end of the first flue gas circulation pipeline 15 communicates with the medium addition port 111. Part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline 15 to the reaction hood within 11.

That is to say, in this embodiment, the flue gas generated in the sintering device 10 can be led back to the reaction hood 11 through the first flue gas circulation pipeline 15, because the flue gas generated in the sintering device 10 has not passed through Subsequent purification, therefore, includes not only carbon dioxide, water vapor, water, but also one or more of sulfur dioxide, nitrogen oxides, and dioxins. The carbon element in the carbon additive reacts near the sintering combustion layer to generate reducing gases such as carbon monoxide and hydrogen, and forms a reducing atmosphere near the sintering combustion layer. By adding the first flue gas circulation pipeline 15 and the second flue gas circulation pipeline 50, the flue gas can be circulated multiple times, and sulfur dioxide, nitrogen oxides, and dioxins in the flue gas can be removed during the multiple circulation process, Carbon dioxide, water vapor, and water are reused repeatedly to generate carbon monoxide and hydrogen, so that a reducing atmosphere is always formed near the sintering material, which can further inhibit the formation of nitrogen oxides, ensure the treatment of nitrogen oxides, and realize denitrification of sintering flue gas The purpose, and ultimately can produce a large amount of carbon dioxide, the carbon dioxide in the flue gas can be recycled and reused to achieve carbon neutrality.

In the sixth embodiment shown in Figure 7, a sintering process production equipment is also disclosed, the difference from the third embodiment is that in this embodiment, the cooling zone 31 includes a first cooling zone 311 and a second cooling zone 312, the temperature of the second cooling zone 312 is higher than the temperature of the first cooling zone 311; the flue gas purification pipeline 20 also includes a secondary heating pipeline 23, and the secondary heating pipeline 23 includes a secondary heating inlet 231 and a secondary heating outlet 232, the secondary heating inlet 231 is located above the first cooling zone 311, and the secondary heating outlet 232 is located below the second cooling zone 312; the flue gas heating inlet 21 is located below the first cooling zone 311, and the flue gas heating outlet 22 is located at above the second cooling zone 312 .

The cooling zone 31 is set as a first cooling zone 311 and a second cooling zone 312. The sintered material that has been cooled for a long time is in the first cooling zone 311, and the sintered material that has been cooled for a short time or has just been heated is in the second cooling zone 312. Therefore, the temperature of the second cooling zone 312 is higher than the temperature of the first cooling zone 311. When heating the flue gas, the low-temperature flue gas is firstly heated through the first cooling zone 311 with a lower temperature, and then passed through the second cooling zone. The heating pipeline 23 transports the initially heated flue gas to the second cooling zone with a higher temperature for further heating. Through secondary heating, the heat exchange efficiency can be greatly improved, and the whitening effect of the flue gas can be ensured. The temperature can reach the temperature at which the reaction occurs, thereby ensuring the effect of removing carbon monoxide and denitrification. In addition, the cooling temperature of the clinker can be further reduced, and the flue gas temperature for waste heat recovery can be increased. In order to enhance the denitrification effect, when the flue gas enters the first cooling zone 311 and/or the second cooling zone 312, a reducing medium, such as carbon monoxide, hydrogen, urea, ammonia, etc., can be sprayed, and the reducing medium is heated by the sintering material. The nitrogen oxides in the flue gas undergo redox reactions to generate nitrogen, water and carbon dioxide, thereby enhancing the denitrification effect.

In this embodiment, the secondary heating pipeline 23 is provided with a catalyst adding device and/or a reducing agent adding device. By installing a catalyst adding device, the catalyst can be added to increase the reaction efficiency, thereby increasing the effect of desulfurization and denitrification.

As shown in Figure 8, the present invention also discloses Embodiment 7. This embodiment also discloses a sintering process production equipment. The difference from Embodiment 6 is that in this embodiment, the sintering process production equipment also includes a second The flue gas circulation pipeline 50, the first end of the second flue gas circulation pipeline 50 communicates with the flue gas outlet of the tail reactor 40, the second end of the second flue gas circulation pipeline 50 communicates with the medium addition port of the reaction hood 11 111 is connected. The flue gas passes through the first cooling zone 311, the second cooling zone 312 and the secondary heating pipeline 23. The flue gas has undergone a round of desulfurization and denitrification, and the dioxin in the flue gas is also very small, and then passes through the tail reactor 40 Purification, including a large amount of carbon dioxide and water vapor in the flue gas, part of the flue gas returns to the reaction hood 11 through the second flue gas circulation pipeline 50, and the other part of the flue gas is discharged through the chimney, the carbon dioxide and water vapor in the flue gas are combined with the sintering The carbon element in the carbon additive in the material reacts near the sintering combustion layer to generate a large amount of reducing gases such as carbon monoxide and hydrogen, and forms a reducing atmosphere near the sintering combustion layer. To ensure the treatment of nitrogen oxides and achieve the purpose of denitrification of sintering flue gas, the specific chemical equation of the reaction between carbon and combustion products is as follows:

C+H ₂ O(g)→CO+H ₂ ;

C+CO ₂ →CO.

It should be noted that the first end of the second flue gas circulation pipeline 50 can not only communicate with the flue gas outlet of the tail reactor 40, but also communicate with the flue gas heating outlet 22, or communicate with both at the same time.

As shown in Figure 9 is the eighth embodiment of the present invention, this embodiment is based on the seventh embodiment, the sintering device also includes a first flue gas circulation pipeline 15, the first end of the first flue gas circulation pipeline 15 It communicates with the sintering flue outlet 1331 of the exhaust mechanism 13, and the second end of the first flue gas circulation pipeline 15 communicates with the reaction hood. Part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline 15 into the reaction hood 11. .

That is to say, in this embodiment, the flue gas generated in the sintering device 10 can be led back to the reaction hood 11 through the first flue gas circulation pipeline 15, because the flue gas generated in the sintering device 10 has not passed through Subsequent purification, therefore, includes not only carbon dioxide, water vapor, water, but also one or more of sulfur dioxide, nitrogen oxides, and dioxins. The carbon element in the carbon additive reacts near the sintering combustion layer to generate reducing gases such as carbon monoxide and hydrogen, and forms a reducing atmosphere near the sintering combustion layer. By adding the first flue gas circulation pipeline 15 and the second flue gas circulation pipeline 50, the flue gas can be circulated multiple times, and sulfur dioxide, nitrogen oxides, and dioxins in the flue gas can be removed during the multiple circulation process, Carbon dioxide, water vapor, and water are reused repeatedly to generate carbon monoxide and hydrogen, so that a reducing atmosphere is always formed near the sintering material, which can further inhibit the formation of nitrogen oxides and sulfides, ensure the treatment of nitrogen oxides, and realize the sintering process. The purpose of flue gas denitrification, and ultimately can produce a large amount of carbon dioxide, the carbon dioxide in the flue gas can be recycled and reused to achieve carbon neutrality.

Shown in Fig. 10 can be a kind of specific structure of sintered material cooling device 30, comprise bearing platform 32, dry mist generator 33 and blower fan 34, sintered material is arranged on the bearing platform 32, coolant is in the dry mist generator 33 After being atomized, it is sent to the carrier platform 32, and the atomized coolant is sprayed or adsorbed onto the carrier platform 32 to exchange heat with the high-temperature sintered material.

The loading platform 32 is provided with a flue gas heating inlet 21, the inlet of the dry mist generator 33 communicates with the air inlet of the fan 34, and the air outlet of the fan 34 communicates with the flue gas heating inlet 21. Preferably, the flue gas heating inlet 21 is connected with the loading platform. The lower part of 32 is connected, and the fan 34 is used to blow the atomized flue gas to the bearing platform 32 or absorb it under negative pressure to facilitate the heat exchange between the flue gas and the high-temperature sintered material, and the shape will naturally rise after absorbing heat.

In the ninth embodiment shown in Figure 11, a sintering process production equipment is also disclosed, the reaction principle of which is the same as that of the third embodiment above, the difference is that the sintering process production equipment adopts an on-machine cooling sintering machine, and its sintering device 10 and The sinter cooling device 30 is connected together. In this embodiment, the ignition mechanism 14, the reaction hood 11, and the flue gas heating inlet 21 are arranged in sequence, the flue gas heating inlet 21 is located above the cooling area 31 of the cooling device, and the flue gas heating outlet 22 is arranged below the cooling area 31 , The cooling zone 31 is provided with a draft cooler below, that is to say, after the flue gas enters the sintered material from above, it leaves from the bottom under the action of the draft cooler, which saves more space.

As shown in Figure 12, the present invention also discloses Embodiment 10. This embodiment also discloses a sintering process production equipment. The difference from Embodiment 9 is that in this embodiment, the sintering process production equipment also includes a second The flue gas circulation pipeline 50 , the first end of the second flue gas circulation pipeline 50 communicates with the flue gas outlet of the tail reactor 40 , and the second end of the second flue gas circulation pipeline 50 communicates with the inside of the reaction hood 11 . The flue gas is purified by the cooling zone 31 and the tail reactor 40, and most of the flue gas has been desulfurized and denitrified, and the content of dioxins is also very small. Return to the reaction hood 11 through the second flue gas circulation pipeline 50, another part of the flue gas is discharged through the chimney, and the carbon dioxide and water vapor in the flue gas react with the carbon element in the carbon additive in the sintering material near the sintering combustion layer , generate a large amount of reducing gases such as carbon monoxide and hydrogen, and form a reducing atmosphere near the sintering combustion layer. To ensure the treatment of nitrogen oxides and achieve the purpose of denitrification of sintering flue gas, the specific chemical equation of the reaction between carbon and combustion products is as follows:

C+H ₂ O(g)→CO+H ₂ ;

C+CO ₂ →CO.

As shown in Figure 13, it is the eleventh embodiment of the present invention. This embodiment is based on the tenth embodiment. The sintering device also includes a first flue gas circulation pipeline 15. One end communicates with the sintering flue outlet 1331 of the exhaust mechanism 13, the second end of the first flue gas circulation pipeline 15 communicates with the inside of the reaction hood 11, and part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline 15 to the reaction chamber. Inside the cover 11.

As shown in Figure 14, it is the twelveth embodiment of the present invention. The sintering process production equipment in this embodiment adopts an ordinary sintering machine, which differs from the on-machine cooling sintering machine in that the sintering device 10 and the sintering material cooling device 30 are separated. , its reaction principle and other structures are the same as those of the cooling and sintering machine on the machine.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

A sintering device, comprising a transportation mechanism (12) for transporting sintering material, characterized in that it also includes:

Reaction cover (11), described reaction cover (11) cover is arranged on the top of described transport mechanism (12), and described reaction cover (11) and described transport mechanism (12) encircle reaction space, and described reaction cover (11) is provided with a medium addition port (111) for adding a medium, and the medium addition port (111) communicates with the reaction space.
The sintering device according to claim 1, characterized in that,

The medium addition port (111) is located near the top of the reaction cover (11).
The sintering device according to claim 1, characterized in that,

The reaction cover (11) is provided with a valve (112) for controlling the amount of medium added.
The sintering device according to claim 1, characterized in that,

The medium addition port (111) is used for introducing flue gas.
The sintering device according to claim 4, wherein the sintering device further comprises:

An exhaust mechanism (13), the exhaust mechanism (13) is arranged below the transport mechanism (12);

Ignition mechanism (14), described ignition mechanism (14) is used for igniting and burning knot;

The first flue gas circulation pipeline (15), the first end of the first flue gas circulation pipeline (15) communicates with the sintering flue outlet (1331) of the draft mechanism (13), the first flue gas The second end of the gas circulation pipeline (15) communicates with the medium addition port (111), and part of the flue gas generated by the sintering material is circulated to the reaction hood (11) through the first flue gas circulation pipeline (15). )Inside.
The sintering device according to claim 4 or 5, characterized in that,

The flue gas includes one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, carbon monoxide, and dioxins.
The sintering device according to claim 1, characterized in that,

The reaction cover (11) is also provided with an external flue gas addition port (113) for introducing external flue gas.
The sintering device according to claim 1, characterized in that, the sintering device (10) further comprises:

A medium adding mechanism, the discharge port of the medium adding mechanism communicates with the medium adding port (111), the medium adding mechanism is used to spray reducing medium to the sintering material, the reducing medium and flue gas output by the medium adding mechanism The nitrogen oxides in the sinter react or react with the carbon in the sinter to form a reducing agent and release heat.
The sintering device according to claim 8, characterized in that,

The transportation mechanism (12) is a sintering trolley, and the sintering material is arranged in the sintering trolley, and the sintering material burns during the movement of the sintering trolley to form a burnt layer and a burning layer distributed from top to bottom. and the sintered material layer, the medium reacts with the burned layer and the sintered material layer after passing through the burned layer and releases heat.
The sintering device according to claim 9, characterized in that,

The medium adding mechanism transports the medium above the burnt layer of the sintered material, and the medium is sucked into the inside of the sintered material and the carbon in the burning layer and the sintered material layer by the ventilation mechanism (13). Contact should generate flammable gas, which will undergo oxidation reaction and release heat.
The sintering device according to claim 1, characterized in that,

The exhaust mechanism (13) includes a blower fan, a plurality of sintering air boxes and a sintering flue (133), all of the sintering air boxes are arranged below the transport mechanism (12), and all of the sintering air boxes are connected to the sintering air boxes. The flue (133) is connected, and the fan is arranged on the sintering flue (133).
The sintering device according to claim 11, wherein the sintering bellows comprises:

A bellows body (131), the bellows body (131) has an inner cavity (1311) for collecting smoke, and the bellows body (131) is also provided with a smoke inlet communicating with the inner cavity (1311);

Reactor (132), the reactor (132) has a purification chamber (1322), also has a smoke outlet (1323) communicated with the purification chamber (1322) on the described reactor (132), the purification The chamber (1322) communicates with the inner chamber (1311), and the purification chamber (1322) is used to purify the smoke in the inner chamber (1311).
A sintering process production equipment, characterized by comprising the sintering device according to any one of claims 1-12.
The sintering process production equipment according to claim 13, characterized in that, the sintering device (10) has a sintering flue outlet (1331), and the sintering process production equipment further comprises:

A flue gas purification pipeline (20), the flue gas purification pipeline (20) includes a correspondingly arranged flue gas heating inlet (21) and a flue gas heating outlet (22), and the flue gas heating inlet (21) is connected to the flue gas heating inlet (21) The sintering flue outlet (1331) is connected;

A sintering material cooling device (30), the sintering material cooling device (30) is arranged between the flue gas heating inlet (21) and the flue gas heating outlet (22), the flue gas generated by the sintering device (10) passes through the The flue gas heating inlet (21) enters the sintering material cooling device (30), the flue gas cools the burned sintering material, and at the same time, the burned sintering material heats the passing flue gas, and the heated flue gas Enter the flue gas heating outlet (22);

A tail reactor (40), the tail reactor (40) communicates with the flue gas heating outlet (22) through a pipeline, and the tail reactor (40) is used for purifying the heated flue gas.
The sintering process production equipment according to claim 14, characterized in that,

The sintering material cooling device (30) includes a cooling area (31), the flue gas heating inlet (21) is located below the cooling area (31), and the flue gas heating outlet (22) is located in the cooling area (31) above.
The sintering process production equipment according to claim 15, characterized in that, the sintering process production equipment further comprises:

The second flue gas circulation pipeline (50), the first end of the second flue gas circulation pipeline (50) is connected to the flue gas outlet of the tail reactor (40) and/or the flue gas heating outlet ( 22) communication, the second end of the second flue gas circulation pipeline (50) communicates with the medium addition port (111) of the reaction hood (11).
The sintering process production equipment according to claim 16, wherein the sintering device further comprises:

The first flue gas circulation pipeline (15), the first end of the first flue gas circulation pipeline (15) communicates with the sintering flue outlet (1331) of the draft mechanism (13), the first flue gas The second end of the gas circulation pipeline (15) communicates with the interior of the reaction hood (11), and part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline (15) into the reaction hood (11).
The sintering process production equipment according to claim 17, characterized in that,

The flue gas contains one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, carbon monoxide, and dioxins.
The sintering process production equipment according to claim 15, characterized in that,

The cooling zone (31) includes a first cooling zone (311) and a second cooling zone (312), and the temperature of the second cooling zone (312) is greater than the temperature of the first cooling zone (311);

The flue gas purification pipeline (20) also includes a secondary heating pipeline (23), and the secondary heating pipeline (23) includes a secondary heating inlet (231) and a secondary heating outlet (232), the The secondary heating inlet (231) is located above the first cooling zone (311), and the secondary heating outlet (232) is located below the second cooling zone (312);

The flue gas heating inlet (21) is located below the first cooling zone (311), and the flue gas heating outlet (22) is located above the second cooling zone (312).
The sintering process production equipment according to claim 19, characterized in that,

The secondary heating pipeline (23) is provided with a catalyst adding device and/or a reducing agent adding device.
The sintering process production equipment according to claim 20, characterized in that, the sintering process production equipment further comprises:

The second flue gas circulation pipeline (50), the first end of the second flue gas circulation pipeline (50) is connected to the flue gas outlet of the tail reactor (40) and/or the flue gas heating outlet ( 22) communication, the second end of the second flue gas circulation pipeline (50) communicates with the interior of the reaction hood (11).
The sintering process production equipment according to claim 21, wherein the sintering device further comprises:

The first flue gas circulation pipeline (15), the first end of the first flue gas circulation pipeline (15) communicates with the sintering flue outlet (1331) of the draft mechanism (13), the first flue gas The second end of the gas circulation pipeline (15) communicates with the interior of the reaction hood (11), and part of the flue gas generated by the sintering material passes through the first flue gas circulation pipeline (15) into the reaction hood (11).
The sintering process production equipment according to claim 22, characterized in that,

The flue gas contains one or more of carbon dioxide, water vapor, water, sulfur dioxide, nitrogen oxides, carbon monoxide, and dioxins.