System for producing product taking carbonate as raw material and recovering carbon dioxide

Abstract

The utility model relates to the technical field of production of products taking carbonate as a raw material, and provides a system for producing products taking carbonate as a raw material and recovering carbon dioxide, which comprises a preheating device, a calcining furnace, a finished product collecting device and a carbon dioxide collecting device, a feeding port of the preheating device is used for being communicated with the feeding device, a discharging port of the preheating device is communicated with a feeding port of the calcining furnace, a discharging port of the calcining furnace is communicated with an inlet of the finished product collecting device, and an air outlet of the finished product collecting device is communicated with an air inlet of the preheating device. A gas outlet of the preheating device is respectively communicated with gas inlets of the carbon dioxide collecting device and the finished product collecting device. Gas-solid separation is carried out on combustion products of the calcining furnace through the finished product collecting device, smoke is recycled between the preheating device and the finished product collecting device, heat of finished products is reduced, the concentration of carbon dioxide in the smoke is improved, and low-cost collection, low energy consumption and environmental protection of the carbon dioxide collecting device are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of production of products using carbonate as raw material, in particular to a system for producing products using carbonate as raw material and recovering carbon dioxide. Background Art

[0002] In the current industrial production process, the production of light-burned magnesium oxide is mainly carried out by directly calcining magnesite powder inside special equipment such as vertical kilns, suspension furnaces or rotary kilns to decompose it under heat. In this process, magnesite powder is converted into magnesium oxide after calcination, and the same amount of carbon dioxide gas is released at the same time. However, since the carbon dioxide gas produced by decomposition during the calcination process mixes with the heated flue gas, the volume concentration of the final emitted carbon dioxide gas is low, usually in the range of 15-20%. This low concentration of carbon dioxide is not only not conducive to its efficient recycling, but also brings a considerable burden to the environment.

[0003] At present, the process of calcining magnesite powder to produce magnesium oxide still faces many challenges. Among them, a significant problem is that the carbon dioxide gas produced by fuel combustion is difficult to capture and recycle. This not only leads to a large amount of carbon emissions, exacerbating the global greenhouse effect, but also makes the utilization of magnesite resources inefficient and environmentally friendly.

[0004] In addition, the traditional heat exchange (heat storage hot air furnace) heating method has obvious deficiencies in heat energy utilization. This heating method often leads to low thermal efficiency and a large waste of heat energy, which in turn increases production costs and reduces the economic benefits of the enterprise. More importantly, the existing production system often ignores the heat taken away by the high-temperature finished magnesium oxide. Utility Model Content

[0005] The utility model provides a system for producing products using carbonate as raw material and recovering carbon dioxide, which is used to solve the problems of high cost, low concentration, high energy consumption and environmental impact of collecting carbon dioxide in the process of producing products using carbonate as raw material in the prior art.

[0006] The utility model provides a product using carbonate as raw material and a system for recovering carbon dioxide, comprising: a preheating device, a calcining furnace, a finished product collecting device and a carbon dioxide collecting device; the feed port of the preheating device is used to communicate with a feeding device, the discharge port of the preheating device is communicated with the feed port of the calcining furnace, the discharge port of the calcining furnace is communicated with the inlet of the finished product collecting device, the air outlet of the finished product collecting device is communicated with the air inlet of the preheating device, and the air outlet of the preheating device is respectively communicated with the air inlets of the carbon dioxide collecting device and the finished product collecting device.

[0007] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the finished product collection device includes a gas-solid separator and a cooler, the feed port of the gas-solid separator is connected to the discharge port of the calcining furnace, the discharge port of the gas-solid separator is connected to the cooler, and the air outlet of the gas-solid separator is connected to the air inlet of the preheating device.

[0008] According to the utility model, a system for producing products using carbonate as raw materials and recovering carbon dioxide also includes a processing device, the inlet of the processing device is connected to the air outlet of the preheating device, the outlet of the processing device is respectively connected to the air inlets of the carbon dioxide collection device and the cooler, and the air outlet of the cooler is connected to the air inlet of the calcining furnace.

[0009] According to a system for producing products using carbonate as raw material and recovering carbon dioxide provided by the utility model, the cooler is a multi-stage cooler.

[0010] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the processing device includes a heat exchange component, the inlet of the heat exchange component is connected to the inlet of the processing device, and the outlet of the heat exchange component is connected to the outlet of the processing device.

[0011] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the processing device also includes a purification component, which is arranged between the outlet of the heat exchange component and the outlet of the processing device; or, the purification component is arranged between the inlet of the processing device and the inlet of the heat exchange component.

[0012] According to the utility model, a system for producing products using carbonate as raw materials and recovering carbon dioxide also includes a fan, which is arranged between the processing device and the cooler, wherein the inlet of the fan is connected to the outlet of the processing device, and the outlet of the fan is connected to the air inlet of the cooler.

[0013] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the calcining furnace has an oxygen inlet and a fuel inlet, the oxygen inlet is used to communicate with the oxygen supply component, and the fuel inlet is used to communicate with the fuel component.

[0014] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the preheating device is a multi-stage preheating device.

[0015] According to a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model, the preheating device is a cyclone preheater; and / or the cooler is a cyclone cooler.

[0016] The utility model provides a system for producing products using carbonate as raw materials and recovering carbon dioxide. The system separates the combustion products of the calcining furnace into gas and solid through a finished product collecting device. The flue gas is recycled between a preheating device and a finished product collecting device, thereby reducing the heat of the finished product and increasing the carbon dioxide concentration in the flue gas, which helps the carbon dioxide collecting device to collect the products at a low cost, with low energy consumption and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the utility model;

[0019] Reference numerals:

[0020] 1. Feeding device; 2. Preheating device; 21. First-stage cyclone preheater; 22. Second-stage cyclone preheater; 23. Third-stage cyclone preheater; 24. Fourth-stage cyclone preheater; 3. Calcinating furnace; 4. Finished product collecting device; 41. Gas-solid separator; 42. Cooler; 421. First-stage cyclone cooler; 422. Second-stage cyclone cooler; 423. Third-stage cyclone cooler; 5. Heat exchange component; 6. Purification component; 7. Fan; 8. Oxygen supply component; 9. Fuel component; 10. Carbon dioxide collecting device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0027] Combine the following Figure 1The utility model describes a system for producing products using carbonate as raw material and recovering carbon dioxide.

[0028] The system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the embodiment of the utility model comprises: a preheating device 2, a calcining furnace 3, a finished product collecting device 4 and a carbon dioxide collecting device 10. The feed port of the preheating device 2 is used to communicate with the feeding device 1, the discharge port of the preheating device 2 is communicated with the feed port of the calcining furnace 3, the discharge port of the calcining furnace 3 is communicated with the inlet of the finished product collecting device 4, the air outlet of the finished product collecting device 4 is communicated with the air inlet of the preheating device 2, and the air outlet of the preheating device 2 is communicated with the air inlet of the carbon dioxide collecting device 10 and the air inlet of the finished product collecting device 4, respectively.

[0029] The system for producing products with carbonate as raw materials and recovering carbon dioxide provided by the embodiment of the utility model is mainly used to produce products with carbonate as raw materials and collect carbon dioxide generated in the production process, such as producing magnesium oxide, whose raw material is dolomite powder; producing calcium oxide, whose raw material is limestone powder, etc.

[0030] refer to Figure 1 After the raw material (taking magnesite powder as an example) is dried to remove free moisture, it enters the preheating device 2 for preheating through the feeding device 1. The preheating temperature can be set according to actual needs (such as 150-960°C), or a multi-stage preset device can be used for multiple preheating. The preheated raw material enters the calcining furnace 3 through the discharge port of the preheating device 2 for calcination and decomposition (the calcination temperature can be 900-1100°C), completing the calcination and decomposition of the raw material to form magnesium oxide, carbon dioxide and waste gas. The embodiment of the utility model is preheated by the preheating device 2 and then calcined, which can reduce fuel consumption and save energy.

[0031] Magnesium oxide, carbon dioxide and waste gas enter the finished product collecting device 4 through the discharge port of the calcining furnace 3 for gas-solid separation, wherein magnesium oxide is collected through the discharge port of the finished product collecting device 4, and the flue gas (waste gas and carbon dioxide) enters the preheating device 2 through the gas outlet of the finished product collecting device 4, and the heat taken away by magnesium oxide is exchanged with the raw material in a dilute phase carrier flow, thereby accelerating the preheating of the material and realizing the recycling of waste gas.

[0032] Furthermore, the gas outlet of the preheating device 2 is connected to the carbon dioxide collecting device 10, which includes a capture component and collects high concentrations of carbon dioxide. In addition, the gas outlet of the preheating device 2 is also connected to the gas inlet of the finished product collecting device 4, and enters the finished product collecting device 4 for circulation, thereby avoiding the loss of low-concentration carbon dioxide in the flue gas and facilitating recovery.

[0033] It should be noted that the carbon dioxide collection device 10 includes a capture component, a storage component and a transportation component. The capture component is used to collect carbon dioxide. The higher the concentration, the easier it is to collect. The storage component is used to store carbon dioxide gas. The transportation component is used to transport carbon dioxide.

[0034] The system for producing products using carbonate as raw materials and recovering carbon dioxide provided by the embodiment of the utility model performs gas-solid separation on the combustion products of the calcining furnace 3 through the finished product collecting device 4, and the flue gas is recycled between the preheating device 2 and the finished product collecting device 4, thereby reducing the heat of the finished product and increasing the carbon dioxide concentration in the flue gas, which helps the carbon dioxide collecting device 10 to collect at a low cost, with low energy consumption and environmental protection.

[0035] The preheating device 2 provided in the embodiment of the utility model is a multi-stage preheating device 2, and the preheating device 2 can be a cyclone preheater.

[0036] In one embodiment, the preheating device 2 is a four-stage preheating device 2, which includes a first-stage cyclone preheater 21, a second-stage cyclone preheater 22, a third-stage cyclone preheater 23 and a fourth-stage cyclone preheater 24. The first-stage cyclone preheater 21, the second-stage cyclone preheater 22, the third-stage cyclone preheater 23 and the fourth-stage cyclone preheater 24 all have a feed port and a discharge port, wherein the feed port of the first-stage cyclone preheater 21 is used to communicate with the feeding device 1, the discharge port of the first-stage cyclone preheater 21 is communicated with the feed port of the second-stage cyclone preheater 22, the discharge port of the second-stage cyclone preheater 22 is communicated with the feed port of the third-stage cyclone preheater 23, the discharge port of the third-stage cyclone preheater 23 is communicated with the feed port of the fourth-stage cyclone preheater 24, and the discharge port of the fourth-stage cyclone preheater 24 is communicated with the feed port of the calcining furnace 3.

[0037] The raw materials enter the first-stage cyclone preheater 21, the second-stage cyclone preheater 22, the third-stage cyclone preheater 23 and the fourth-stage cyclone preheater 24 in turn for preheating, wherein the preheating temperature of the first-stage cyclone preheater 21 is 150°C, the preheating temperature of the second-stage cyclone preheater 22 is 250°C, the preheating temperature of the third-stage cyclone preheater 23 is 400°C, and the preheating temperature of the fourth-stage cyclone preheater 24 is 600°C. The preheated raw materials enter the calcining furnace 3 for calcination and decomposition.

[0038] Further, the first-stage cyclone preheater 21, the second-stage cyclone preheater 22, the third-stage cyclone preheater 23 and the fourth-stage cyclone preheater 24 all have an air inlet and an air outlet. The air inlet of the fourth-stage cyclone preheater 24 is connected to the air outlet of the finished product collecting device 4, the air outlet of the fourth-stage cyclone preheater 24 is connected to the air inlet of the third-stage cyclone preheater 23, the air outlet of the third-stage cyclone preheater 23 is connected to the air inlet of the second-stage cyclone preheater 22, the air outlet of the second-stage cyclone preheater 22 is connected to the air outlet of the first-stage cyclone preheater 21, and the air outlet of the first-stage cyclone preheater 21 is connected to the carbon dioxide collecting device 10, or is connected to the air inlet of the finished product collecting device 4.

[0039] The flue gas generated by the calcining furnace 3 passes through the fourth-stage cyclone preheater 24, the third-stage cyclone preheater 23, the second-stage cyclone preheater 22, and the first-stage cyclone preheater 21 in sequence, which can not only realize the reuse of heat and save energy; it can also increase the concentration of carbon dioxide in the flue gas, which is conducive to the recovery of carbon dioxide.

[0040] The finished product collecting device 4 provided in the embodiment of the utility model includes a gas-solid separator 41 and a cooler 42. The feed port of the gas-solid separator 41 is connected to the discharge port of the calcining furnace 3, the discharge port of the gas-solid separator 41 is connected to the cooler 42, and the air outlet of the gas-solid separator 41 is connected to the air inlet of the preheating device 2.

[0041] Specifically, the combustion products enter the finished product collection device 4, the gas-solid separator 41 performs gas-solid separation on the combustion products, and the finished products produced enter the cooler 42 for cooling, and the flue gas (waste gas and carbon dioxide) enters the preheating device 2 to recycle the heat energy in the flue gas. After the flue gas is recycled in the preheating device 2, it is collected by the carbon dioxide collection device 10, or enters the cooler 42 for recirculation.

[0042] The system for producing products using carbonate as raw materials and recovering carbon dioxide provided by an embodiment of the utility model also includes a processing device, the inlet of the processing device is connected to the outlet of the preheating device 2, the outlet of the processing device is respectively connected to the air inlets of the carbon dioxide collection device 10 and the cooler 42, and the air outlet of the cooler is connected to the air inlet of the calcining furnace 3.

[0043] The embodiment of the utility model processes the flue gas at the outlet of the preheating device 2 by arranging a processing device at the outlet of the preheating device 2. The processed flue gas enters the carbon dioxide collecting device 10 to collect the carbon dioxide therein; or enters the cooler 42 and the calcining furnace 3 for circulation.

[0044] The gas-solid separator 41 in the embodiment of the utility model comprises a cyclone. The cooler 42 can be a multi-stage cooler, and the cooler 42 can be a cyclone cooler.

[0045] In one embodiment, the multi-stage cooler is a three-stage cooler, which includes a first-stage cyclone cooler 421, a second-stage cyclone cooler 422 and a third-stage cyclone cooler 423. The first-stage cyclone cooler 421, the second-stage cyclone cooler 422 and the third-stage cyclone cooler 423 all have a feed port and a discharge port. The feed port of the first-stage cyclone cooler 421 is connected to the gas-solid separator 41, and the separated solid (oxide) enters the first-stage cyclone cooler 421 for cooling. The discharge port of the first-stage cyclone cooler 421 is connected to the feed port of the second-stage cyclone cooler 422, and the discharge port of the second-stage cyclone cooler 422 is connected to the feed port of the third-stage cyclone cooler 423. The finished products are cooled in sequence, and the cooled finished products can be collected from the discharge port of the third-stage cyclone cooler 423.

[0046] Furthermore, the first-stage cyclone cooler 421, the second-stage cyclone cooler 422 and the third-stage cyclone cooler 423 all have an air inlet and an air outlet. The air inlet of the third-stage cyclone cooler 423 is connected to the outlet of the processing device, the air outlet of the third-stage cyclone cooler 423 is connected to the air inlet of the second-stage cyclone cooler 422, the air outlet of the second-stage cyclone cooler 422 is connected to the air inlet of the first-stage cyclone cooler 421, and the air outlet of the first-stage cyclone cooler 421 is connected to the air inlet of the calcining furnace 3. After being treated, the flue gas in the processing device enters the calcining furnace 3 again for combustion and circulation, thereby increasing the concentration of carbon dioxide in the flue gas and facilitating the collection of carbon dioxide.

[0047] The processing device in the embodiment of the utility model includes a heat exchange component 5, the inlet of the heat exchange component 5 is connected to the inlet of the processing device, and the outlet of the heat exchange component 5 is connected to the outlet of the processing device. The heat exchange device performs heat exchange treatment on the flue gas coming out of the outlet of the preheating device 2, reduces the residual heat in the flue gas, and is conducive to collecting carbon dioxide in the flue gas.

[0048] The treatment device further includes a purification component 6, which is disposed between the outlet of the heat exchange component 5 and the outlet of the treatment device; or, the purification component 6 is disposed between the inlet of the treatment device and the inlet of the heat exchange component 5; the purification component 6 is used to purify the flue gas. The purification component 6 can be a dust collector.

[0049] Furthermore, the system for producing products using carbonate as raw materials and recovering carbon dioxide also includes a fan 7, which is arranged between the processing device and the cooler, wherein the inlet of the fan 7 is connected to the outlet of the processing device, and the outlet of the fan 7 is connected to the air inlet of the cooler 42. The flue gas treated by the processing device can quickly enter the cooler 42 for circulation under the guidance of the fan 7, thereby increasing the concentration of carbon dioxide in the flue gas.

[0050] The calcining furnace 3 provided in the embodiment of the utility model is a full oxygen combustion decomposition. Specifically, the calcining furnace 3 has an oxygen inlet and a fuel inlet, the oxygen inlet is used to communicate with the oxygen supply assembly 8 to provide sufficient oxygen for the calcining furnace 3, and the fuel inlet is used to communicate with the fuel assembly 9 to provide sufficient fuel for the calcining furnace 3.

[0051] The oxygen supply assembly 8 may be an oxygen production assembly, which includes an air compressor, a cold dryer and a gas storage tank connected in sequence to prepare oxygen. The oxygen supply assembly 8 may also be a gas storage tank for storing oxygen only. The fuel assembly 9 includes a coal powder bin and an air lift pump connected in sequence to deliver the coal powder in the coal powder bin to the calcining furnace 3. The structures of the oxygen supply assembly 8 and the fuel assembly 9 in the embodiment of the utility model are not specifically limited.

[0052] The embodiment of the utility model preheats the raw material through the preheating device 2, recovers the heat, and cools the waste heat in the finished product through the cooler 42, thereby reducing the energy consumption of the system. Compared with the prior art, this embodiment increases the concentration of carbon dioxide in the flue gas through full oxygen combustion combined with the recycling of flue gas, which helps to collect carbon dioxide at a low cost. In addition, the system for producing products using carbonate as raw materials and recovering carbon dioxide is a circulation system, which reduces air leakage, improves the operation rate, and reduces maintenance costs.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A system for producing products using carbonate as raw materials and recovering carbon dioxide, characterized in that: include: Preheating device, calcining furnace, finished product collection device and carbon dioxide collection device; The feed port of the preheating device is used to communicate with the feeding device, the discharge port of the preheating device is communicated with the feed port of the calcining furnace, the discharge port of the calcining furnace is communicated with the inlet of the finished product collecting device, the air outlet of the finished product collecting device is communicated with the air inlet of the preheating device, and the air outlet of the preheating device is communicated with the air inlets of the carbon dioxide collecting device and the finished product collecting device respectively; The finished product collection device includes a gas-solid separator and a cooler, the feed port of the gas-solid separator is connected to the discharge port of the calcining furnace, the discharge port of the gas-solid separator is connected to the cooler, and the air outlet of the gas-solid separator is connected to the air inlet of the preheating device.

2. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to claim 1, characterized in that: It also includes a processing device, the inlet of which is connected to the air outlet of the preheating device, the outlet of which is respectively connected to the air inlets of the carbon dioxide collection device and the cooler, and the air outlet of the cooler is connected to the air inlet of the calcining furnace.

3. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to claim 2, characterized in that: The cooler is a multi-stage cooler.

4. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to claim 2, characterized in that: The processing device comprises a heat exchange component, an inlet of the heat exchange component is communicated with the inlet of the processing device, and an outlet of the heat exchange component is communicated with the outlet of the processing device.

5. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to claim 4, characterized in that: The processing device further comprises a purification component, wherein the purification component is disposed between the outlet of the heat exchange component and the outlet of the processing device; Alternatively, the purification component is disposed between the inlet of the processing device and the inlet of the heat exchange component.

6. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to claim 2, characterized in that: It also includes a fan, which is arranged between the processing device and the cooler, wherein the inlet of the fan is connected to the outlet of the processing device, and the outlet of the fan is connected to the air inlet of the cooler.

7. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to any one of claims 1 to 6, characterized in that: The calcining furnace has an oxygen inlet and a fuel inlet. The oxygen inlet is used to communicate with the oxygen supply assembly, and the fuel inlet is used to communicate with the fuel assembly.

8. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to any one of claims 1 to 6, characterized in that: The preheating device is a multi-stage preheating device.

9. The system for producing products using carbonate as raw materials and recovering carbon dioxide according to any one of claims 1 to 6, characterized in that: The preheating device is a cyclone preheater; And / or, the cooler is a cyclone cooler.

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