Zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residues

Abstract

The utility model discloses a zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residues. The zero-carbon calcium carbide production system comprises a calcium carbide furnace, a dust removal system, a calcining furnace, a calcium oxide forming system, a CO2 purification system, a power generation system, a water electrolysis system and a methanol synthesis system. The water electrolysis system electrolyzes water into hydrogen and oxygen through electric energy from the power generation system; tail gas generated by the calcium carbide furnace is subjected to dust removal and purification and then enters the calcining furnace to be subjected to oxygen-enriched combustion with oxygen from the electrolyzed water system, flue gas generated after combustion passes through the CO2 capturing system to generate high-purity CO2, the high-purity CO2 enters the methanol synthesis system, and the high-purity CO2 and hydrogen from the electrolyzed water system are synthesized into methanol; calcination furnace fuel comes from purified calcium carbide furnace tail gas, and calcium oxide is further formed and then returns to the calcium carbide furnace to be used as a raw material. According to the system, raw material limestone is not needed, waste gas and waste residues are recycled and efficiently utilized, system network power consumption and system energy consumption are reduced, and zero emission of CO2 is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation and carbon reduction, and in particular to a zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue. Background Art

[0002] In the production of acetylene from calcium carbide, carbide slag and carbide furnace exhaust are the main emissions. Traditionally, carbide slag is disposed of through landfill or solidification methods, but these methods pose environmental pollution and resource waste. Carbide furnace exhaust is typically purified and used as fuel in lime kilns, but this also results in low-concentration CO2 emissions after combustion and high capture costs. These issues have become bottlenecks hindering the development of the calcium carbide industry. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention aims to propose a zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue, which can improve resource utilization efficiency, reduce operating costs, and reduce environmental pollution.

[0004] The specific technical solution of this utility model is:

[0005] A zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue, comprising: a calcium carbide furnace, a dust removal system, a calcining furnace, a calcium oxide forming system, a CO2 purification system, a power generation system, a water electrolysis system, and a methanol synthesis system;

[0006] The water electrolysis system is electrically connected to the power generation system, and the calcium carbide furnace is electrically connected to the power generation system;

[0007] The calcium carbide furnace is connected to the dust removal system and the calcium oxide forming system;

[0008] The dust removal system is connected to the calcining furnace;

[0009] The calcining furnace is connected to the water electrolysis system, CO2 purification system and calcium oxide forming system;

[0010] The methanol synthesis system is connected to the water electrolysis system and the CO2 purification system.

[0011] The specific connection relationship and material transfer relationship are as follows:

[0012] The calcium carbide furnace and the electrolytic water system are electrically connected to the power generation system respectively, and the power generation system provides electrical energy to the calcium carbide furnace and the electrolytic water system; the electrolytic water system electrolyzes water into hydrogen and oxygen using the electrical energy from the power generation system;

[0013] The calcium carbide tail gas outlet of the calcium carbide furnace is connected to the air inlet of the dust removal system, and the calcium carbide tail gas is discharged into the dust removal system for dust removal treatment; the calcium oxide feed port of the calcium carbide furnace is connected to the calcium oxide forming system, and the calcium oxide forming system provides calcium oxide for the calcium carbide furnace;

[0014] The material outlet of the calcining furnace is connected to the calcium oxide forming system; the gas outlet of the dust removal system is connected to the calcining furnace; the oxygen inlet of the calcining furnace is connected to the electrolytic water system, which provides oxygen for the calcining furnace. The tail gas generated by the calcium carbide furnace is dust-cleaned and purified by the dust removal system before entering the calcining furnace and undergoing oxygen-enriched combustion with oxygen from the electrolytic water system; the calcium carbide slag produced in the process of producing acetylene from calcium carbide forms calcium oxide during the oxygen-enriched calcination in the calcining furnace, and the calcium oxide is formed by the calcium oxide forming system and then returned to the calcium carbide furnace for use as raw material;

[0015] The CO2 outlet of the calcining furnace is connected to the CO2 purification system; the outlet of the CO2 purification system is connected to the methanol synthesis system; the hydrogen outlet of the water electrolysis system is connected to the methanol synthesis system. The flue gas after combustion passes through the CO2 purification system to produce high-purity CO2, which enters the methanol synthesis system and synthesizes methanol with the hydrogen from the water electrolysis system.

[0016] Wherein, the power generation system is a wind-solar power generation system configured to convert wind energy and solar energy into electrical energy.

[0017] The electrolytic water system uses the electricity from the power generation system to electrolyze water into hydrogen and oxygen; the exhaust gas produced by the calcium carbide furnace is purified through dust removal and then enters the calcining furnace for oxygen-enriched combustion with the oxygen from the electrolytic water system. The flue gas after combustion passes through the CO2 purification system to produce high-purity CO2, which enters the methanol synthesis system and synthesizes methanol with the hydrogen from the electrolytic water system; the calcium carbide slag produced in the process of producing acetylene from calcium carbide is oxygen-enriched calcined in the calcining furnace to form calcium oxide. The fuel of the calcining furnace comes from the purified calcium carbide furnace exhaust gas. The calcium oxide is further formed and returned to the calcium carbide furnace for use as raw material.

[0018] According to an embodiment of the utility model, a zero-carbon calcium carbide production system that couples calcium carbide waste gas and waste residue is used. The calcium carbide slag and the tail gas of the calcium carbide furnace are coupled to oxygen-enriched combustion in a calciner. The high-purity CO2 and calcium oxide produced are used as raw materials for methanol production and calcium carbide furnace production, respectively, achieving the efficient recycling of waste gas and waste residue. Compared with the traditional lime kiln process, no raw material limestone is required, achieving zero CO2 emissions. The coupling of wind and solar power reduces the consumption of grid electricity in the calcium carbide furnace while providing oxygen and hydrogen for oxygen-enriched combustion in the calciner and methanol synthesis through the electrolytic water system, achieving reasonable matching and efficient utilization of resources, and reducing system energy consumption and carbon emissions.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a flow chart of a zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] A zero-carbon calcium carbide production system 1000 coupled with calcium carbide waste gas and waste residue

[0024] Calcium carbide furnace 101, dust removal system 102, calcining furnace 103, calcium oxide forming system 104, CO2 purification system 105, power generation system 106, water electrolysis system 107, methanol synthesis system 108. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. 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 only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "plate thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] The following combination Figure 1As shown, a synthesis gas compression system 1000 driven by coupling green ammonia waste heat and green electricity according to an embodiment of the present invention is described.

[0029] like Figure 1 As shown, the utility model discloses a zero-carbon calcium carbide production system 1000 coupled with calcium carbide waste gas and waste residue, including: a calcium carbide furnace 101, a dust removal system 102, a calcining furnace 103, a calcium oxide forming system 104, a CO2 purification system 105, a power generation system 106, a water electrolysis system 107, and a methanol synthesis system 108.

[0030] The calcium carbide furnace 101 and the electrolytic water system 107 are electrically connected to the power generation system 106 respectively. The power generation system 106 provides electrical energy to the calcium carbide furnace 101 and the electrolytic water system 107. The electrolytic water system 107 uses the electrical energy from the power generation system 106 to electrolyze water into hydrogen and oxygen.

[0031] The calcium carbide tail gas outlet of the calcium carbide furnace 101 is connected to the air inlet of the dust removal system 102, and the calcium carbide tail gas is discharged into the dust removal system 102 for dust removal treatment; the calcium oxide feed port of the calcium carbide furnace 101 is connected to the calcium oxide forming system 104, and the calcium oxide forming system 104 provides calcium oxide for the calcium carbide furnace 101;

[0032] The material outlet of the calcining furnace 103 is connected to the calcium oxide forming system 104; the gas outlet of the dust removal system 102 is connected to the calcining furnace 103; the oxygen inlet of the calcining furnace 103 is connected to the electrolytic water system 107, and the electrolytic water system 107 provides oxygen for the calcining furnace 103. The tail gas generated by the calcium carbide furnace 101 is dust-removed and purified by the dust removal system 102, and then enters the calcining furnace 103 and is subjected to oxygen-enriched combustion with the oxygen from the electrolytic water system 107; the calcium carbide slag produced in the process of producing acetylene from calcium carbide forms calcium oxide during the oxygen-enriched calcination in the calcining furnace 103, and the calcium oxide is formed by the calcium oxide forming system 104 and then returned to the calcium carbide furnace 101 for use as a raw material;

[0033] The CO2 outlet of the calcining furnace 103 is connected to the CO2 purification system 105; the outlet of the CO2 purification system 105 is connected to the methanol synthesis system 108; the hydrogen outlet of the electrolytic water system 107 is connected to the methanol synthesis system 108, and the flue gas after combustion passes through the CO2 purification system 105 to produce high-purity CO2, which enters the methanol synthesis system 108 and synthesizes methanol with the hydrogen from the electrolytic water system 107.

[0034] The power generation system 106 is a wind-solar power generation system configured to convert wind energy and solar energy into electrical energy.

[0035] Among them, the system is configured as follows: the electrolytic water system 107 electrolyzes water into hydrogen and oxygen through the electricity from the power generation system 106; the tail gas generated by the calcium carbide furnace 101 is purified by dust removal, and then enters the calcining furnace 103 and is burned with oxygen from the electrolytic water system 107. The flue gas after combustion passes through the CO2 purification system 105 to produce high-purity CO2 and enters the methanol synthesis system 108 to synthesize methanol with the hydrogen from the electrolytic water system 107; the calcium carbide slag produced in the process of producing acetylene from calcium carbide is calcined in oxygen-enriched form in the calcining furnace 103 to form calcium oxide. The fuel of the calcining furnace comes from the purified calcium carbide furnace tail gas, and the calcium oxide is further formed and returned to the calcium carbide furnace for use as raw material.

[0036] The calcium carbide furnace 101 is electrically connected to the power generation system 106. The excess electricity generated by wind and solar power to power the water splitting system 107 supplements the power consumption of the calcium carbide furnace 101, reducing or completely replacing grid power usage and reducing or completely eliminating indirect CO2 emissions. The calcium carbide furnace 101 is connected to the dust removal system 102 and the calcium oxide forming system 104. The calcium carbide furnace exhaust is sent to the calcining furnace 103, and the formed calcium oxide is returned to the calcium carbide furnace 101 to meet raw material needs, completely replacing the calcium oxide from the lime kiln.

[0037] The dust removal system 102 is connected to the calcium carbide furnace 101 to remove dust from the tail gas of the calcium carbide furnace 101 to prevent impurities such as SiO2 and Al2O3 from entering the calcining furnace 103 and affecting the purity of the calcium oxide product.

[0038] The calciner 103 is connected to the electrolytic water system 107, receiving oxygen from the electrolytic water system 107 to ensure oxygen-enriched combustion of the calcium carbide furnace exhaust in the calciner 103, reducing the content of impure nitrogen and improving the CO2 purity of the flue gas after combustion. It is also connected to the CO2 purification system 105 to further reduce the content of impure nitrogen and improve the CO2 purity in the flue gas to meet the requirements of subsequent methanol synthesis. The calciner 103 is connected to the calcium oxide molding system 104, which molds the calcium oxide produced by the calciner 103 to meet the specifications of the raw calcium oxide required by the calcium carbide furnace 101.

[0039] Power generation system 106 is connected to water electrolysis system 107 to ensure the power required for hydrogen and oxygen production by water electrolysis. Power generation system 106 is also connected to calcium carbide furnace 101. After meeting the power requirements of water electrolysis for hydrogen and oxygen production, any excess power generated by power generation system 106 is used to power calcium carbide furnace 101, reducing or completely replacing grid power usage and reducing or eliminating indirect CO2 emissions.

[0040] The water electrolysis system 107 is electrically connected to the power generation system 106, receiving electricity from the power generation system 106 for the production of hydrogen and oxygen through water electrolysis. The water electrolysis system 107 is connected to the calciner 103, delivering the oxygen produced to the calciner 103 to meet the calciner's oxygen-enriched combustion requirements. The water electrolysis system 107 is also connected to the methanol synthesis system 108, delivering the hydrogen produced to the methanol synthesis system 108 to meet the hydrogen demand for methanol synthesis.

[0041] The methanol synthesis system 108 is connected to the water electrolysis system 107 for receiving hydrogen from the water electrolysis system 107. The methanol synthesis system 108 is connected to the CO2 purification system 105 for receiving CO2 required to meet the methanol synthesis demand.

[0042] According to a zero-carbon calcium carbide production system 1000 coupled with calcium carbide waste gas and waste residue in an embodiment of the present invention, calcium carbide slag and calcium carbide furnace tail gas are coupled for oxygen-enriched combustion through a calciner 103. The high-purity CO2 and calcium oxide produced are used as raw materials for methanol production and calcium carbide furnace production, respectively, achieving efficient recycling of waste gas and waste residue. Compared with the traditional lime kiln process, no raw material limestone is required, achieving zero CO2 emissions. The coupling of wind and solar power reduces the consumption of grid electricity in the calcium carbide furnace while providing oxygen and hydrogen for oxygen-enriched combustion in the calciner and methanol synthesis through the electrolytic water system, achieving reasonable matching and efficient utilization of resources and reducing system energy consumption and carbon emissions.

[0043] The zero-carbon calcium carbide production system 1000 coupled with calcium carbide waste gas and waste residue according to the embodiment of the present invention and the other components and operations described are well known to those skilled in the art and will not be described in detail here. The up-down direction, left-right direction, and front-back direction are based on the up-down direction, left-right direction, and front-back direction shown in the figure.

[0044] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue, characterized in that: include: Calcium carbide furnace (101), dust removal system (102), calcining furnace (103), calcium oxide forming system (104), CO2 purification system (105), power generation system (106), water electrolysis system (107), methanol synthesis system (108); The water electrolysis system (107) is electrically connected to the power generation system (106), and the calcium carbide furnace (101) is electrically connected to the power generation system (106); The calcium carbide furnace (101) is connected to the dust removal system (102) and the calcium oxide forming system (104); The dust removal system (102) is connected to the calcining furnace (103); The calcining furnace (103) is connected to the water electrolysis system (107), the CO2 purification system (105) and the calcium oxide forming system (104); The methanol synthesis system (108) is connected to the water electrolysis system (107) and the CO2 purification system (105).

2. The zero-carbon calcium carbide production system coupled with calcium carbide waste gas and waste residue according to claim 1 is characterized in that: Specifically, the calcium carbide furnace (101) and the water electrolysis system (107) are electrically connected to the power generation system (106), and the power generation system (106) provides electric energy to the calcium carbide furnace (101) and the water electrolysis system (107); the water electrolysis system (107) electrolyzes water into hydrogen and oxygen using the electric energy from the power generation system (106); The calcium carbide tail gas outlet of the calcium carbide furnace (101) is connected to the air inlet of the dust removal system (102), and the calcium carbide tail gas is discharged into the dust removal system (102) for dust removal treatment; the calcium oxide feed port of the calcium carbide furnace (101) is connected to the calcium oxide forming system (104), and the calcium oxide forming system (104) provides calcium oxide to the calcium carbide furnace (101); The material outlet of the calcining furnace (103) is connected to the calcium oxide forming system (104); the gas outlet of the dust removal system (102) is connected to the calcining furnace (103); the oxygen inlet of the calcining furnace (103) is connected to the electrolytic water system (107), and the electrolytic water system (107) provides oxygen for the calcining furnace (103). The tail gas generated by the calcium carbide furnace (101) is dust-removed and purified by the dust removal system (102), and then enters the calcining furnace (103) and is subjected to oxygen-enriched combustion with the oxygen from the electrolytic water system (107); the calcium carbide slag generated in the process of producing acetylene from calcium carbide forms calcium oxide in the oxygen-enriched calcination in the calcining furnace (103), and the calcium oxide is formed by the calcium oxide forming system (104) and then returned to the calcium carbide furnace (101) for use as a raw material; The CO2 outlet of the calcining furnace (103) is connected to the CO2 purification system (105); the outlet of the CO2 purification system (105) is connected to the methanol synthesis system (108); the hydrogen outlet of the electrolytic water system (107) is connected to the methanol synthesis system (108), and the flue gas after combustion passes through the CO2 purification system (105) to generate high-purity CO2, which enters the methanol synthesis system (108) and synthesizes methanol with the hydrogen from the electrolytic water system (107).

3. A zero-carbon carbide production system coupled with carbide waste gas and waste residue according to claim 1 or 2, characterized in that: The power generation system (106) is a wind-solar power generation system configured to convert wind energy and solar energy into electrical energy.

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