A waste heat recovery device for calcium carbide cracking

Abstract

The utility model discloses a kind of waste heat recovery devices for calcium carbide cracking, including first boiler assembly, the connecting assembly of being installed in the top of first boiler assembly and the second boiler assembly of being installed in the top of connecting assembly, the first boiler assembly includes first boiler body;The connecting assembly includes connecting storehouse, and the top of first boiler body is installed in the bottom of connecting storehouse;The second boiler assembly includes second boiler body, and the top of connecting storehouse is installed in second boiler body, and the outer wall of second boiler body is provided with acetylene gas inlet, acetylene gas outlet.The utility model passes through high-temperature flue gas generated by calcium carbide furnace into waste heat boiler, generates steam by waste heat, then steam is sent into calcium carbide cracking reaction furnace, acetylene gas and other gas are generated using steam, and simultaneously generated gas is again into waste heat boiler to absorb waste heat, and the full use of waste heat is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbide pyrolysis, and in particular to a waste heat recovery device for calcium carbide pyrolysis. Background Technology

[0002] Calcium carbide is an inorganic compound with the chemical formula CaC2. It is a white crystalline powder, and the industrial product is a grayish-black block with a purple or gray cross-section. It reacts violently with water to produce acetylene and release heat. Calcium carbide is an important basic chemical raw material and is also used in organic synthesis and oxyacetylene welding. The acetylene produced can be used to synthesize many organic compounds such as synthetic rubber, artificial resins, acetone, ketene, and carbon black. At the same time, acetylene-oxygen flame is used for welding and cutting metals. Calcium carbide is usually processed after pyrolysis.

[0003] However, the existing calcium carbide pyrolysis process usually uses water quenching, which not only wastes a lot of waste heat and does not make full use of calcium carbide energy, but also generates a lot of dusty wastewater, causing environmental pollution.

[0004] Therefore, a waste heat recovery device for calcium carbide pyrolysis is provided. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the present invention aims to solve the technical problem that existing calcium carbide pyrolysis processes typically employ water quenching.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a waste heat recovery device for calcium carbide pyrolysis, comprising a first boiler assembly, a connecting assembly installed on top of the first boiler assembly, and a second boiler assembly installed on top of the connecting assembly.

[0008] The first boiler assembly includes a first boiler body, on the outer wall of which an exhaust gas inlet and an exhaust gas outlet are provided, and the exhaust gas inlet and exhaust gas outlet are symmetrically distributed on the first boiler body; a first heat dissipation pipe is installed between the exhaust gas inlet and the exhaust gas outlet, and the first heat dissipation pipe is connected to the exhaust gas inlet and the exhaust gas outlet.

[0009] The connecting assembly includes a connecting compartment, the bottom of which is mounted on the top of the first boiler body;

[0010] The second boiler assembly includes a second boiler body, which is installed on the top of the connecting compartment. An acetylene gas inlet and an acetylene gas outlet are provided on the outer wall of the second boiler body. The acetylene gas inlet and the acetylene gas outlet are symmetrically distributed on the second boiler body. A second heat dissipation pipe is installed between the acetylene gas inlet and the acetylene gas outlet, and the second heat dissipation pipe is connected to the acetylene gas inlet and the acetylene gas outlet.

[0011] As a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, a motor is installed on the front of the outer wall of the connecting chamber, a fixing frame is installed on the inner wall of the connecting chamber, and a reduction gearbox is installed between the fixing frames.

[0012] As a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, the upper and lower ends of the reduction gearbox are both output ends, and each output end is equipped with an agitator. The input end of the reduction gearbox is fixedly connected to the motor rotor, and the motor drives the two agitators to rotate through the reduction gearbox to achieve stirring.

[0013] As a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, the dust removal component includes a dust collector, which is fixedly installed on the back side of the outer wall of the second boiler body.

[0014] As a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, wherein: the dust collector is provided with a connecting pipe and a purified gas outlet at both ends, and the connecting pipe is connected to the acetylene gas outlet.

[0015] As a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, a support foot is fixedly installed at the bottom of the first boiler body.

[0016] In a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, a steam outlet is installed on the top of the second boiler body, and the steam outlet is connected to the second boiler body.

[0017] In a preferred embodiment of the waste heat recovery device for calcium carbide pyrolysis described in this utility model, the number of the first heat dissipation pipe and the second heat dissipation pipe is five sets each.

[0018] The beneficial effects of this utility model are as follows: By introducing the high-temperature flue gas generated by the calcium carbide furnace into the waste heat boiler, steam is generated through the waste heat. The steam is then sent to the calcium carbide pyrolysis reactor to generate acetylene and other gases. At the same time, the generated gases re-enter the waste heat boiler to absorb waste heat, effectively ensuring the full utilization of waste heat. Combining the two waste heat boilers into one allows for better heating of water to generate steam. The provided connecting components can agitate the water inside the boiler, making the water heating more uniform. The provided dust removal components can effectively filter dust from the gas generated by the calcium carbide pyrolysis reactor. After filtration, the gas can be directly input into the acetylene purification device to obtain pure acetylene gas. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 A schematic diagram of the overall structure of the waste heat recovery device according to an embodiment of this utility model;

[0021] Figure 2 A schematic diagram of the axial structure of waste heat recovery according to an embodiment of this utility model;

[0022] Figure 3 A schematic diagram of the structure of a dust removal component according to an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the connecting component according to one embodiment of the present invention.

[0024] In the diagram: 100, First boiler assembly; 101, First boiler body; 102, Exhaust gas inlet; 103, Exhaust gas outlet; 104, First heat dissipation pipe; 105, Support leg; 200, Connecting assembly; 201, Connecting compartment; 202, Motor; 203, Fixing frame; 204, Gearbox; 205, Agitator; 300, Second boiler assembly; 301, Second boiler body; 302, Acetylene gas inlet; 303, Acetylene gas outlet; 304, Second heat dissipation pipe; 305, Steam outlet; 400, Dust removal assembly; 401, Dust collector; 402, Connecting pipe; 403, Purified gas outlet. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Example 1

[0029] Reference Figure 1-2 This embodiment provides a waste heat recovery device for calcium carbide pyrolysis, including a first boiler assembly 100, a connecting assembly 200 mounted on top of the first boiler assembly 100, and a second boiler assembly 300 mounted on top of the connecting assembly 200.

[0030] The first boiler assembly 100 includes a first boiler body 101. The outer wall of the first boiler body 101 is designed with heat insulation. A support foot 105 is fixedly installed at the bottom of the first boiler body 101 to support and fix the device. An exhaust gas inlet 102 and an exhaust gas outlet 103 are provided on the outer wall of the first boiler body 101. The exhaust gas inlet 102 is connected to the exhaust port of the calcium carbide furnace and is used to absorb the high-temperature gas generated by the calcium carbide furnace. The exhaust gas inlet 102 and the exhaust gas outlet 103 are symmetrically distributed on the first boiler body 101. A first heat dissipation pipe 104 is installed between the exhaust gas inlet 102 and the exhaust gas outlet 103, and the first heat dissipation pipe 104 is connected to the exhaust gas inlet 102 and the exhaust gas outlet 103.

[0031] The connecting assembly 200 includes a connecting compartment 201, the bottom of which is installed on the top of the first boiler body 101 and is used to connect the second boiler body 301 with the first boiler body 101.

[0032] The second boiler assembly 300 includes a second boiler body 301. A steam outlet 305 is installed on the top of the second boiler body 301 and communicates with it. The second boiler body 301 is installed on top of the connecting chamber 201. An acetylene gas inlet 302 and an acetylene gas outlet 303 are provided on the outer wall of the second boiler body 301. The acetylene gas inlet 302 is connected to the calcium carbide pyrolysis device and is used to receive the high-temperature gas generated by pyrolysis. The acetylene gas inlet 302 and the acetylene gas outlet 303 are symmetrically distributed on the second boiler body 301. A second heat dissipation pipe 304 is installed between the gas inlet 302 and the acetylene gas outlet 303. The second heat dissipation pipe 304 is connected to the acetylene gas inlet 302 and the acetylene gas outlet 303. There are five sets of both the first heat dissipation pipe 104 and the second heat dissipation pipe 304. Through the design of multiple sets of heat dissipation pipes, the contact area with water is effectively increased, thereby achieving better heat conduction to the water. A steam outlet 305 is installed on the top of the second boiler body 301. The steam outlet 305 is connected to the second boiler body 301, and the other end of the steam outlet 305 is connected to the calcium carbide cracking device.

[0033] This embodiment has the following workflow: First, water is added to the first boiler body 101 and the second boiler body 301 so that the water level is higher than the second heat dissipation pipe 304. Then, the exhaust gas inlet 102 is connected to the exhaust port of the calcium carbide furnace, and the acetylene gas inlet 302 is connected to the calcium carbide pyrolysis device. When other equipment is in production, the gas will enter the device and heat the water inside the first boiler body 101 and the second boiler body 301 through the first heat dissipation pipe 104 and the second heat dissipation pipe 304. The heating generates water vapor, which enters the calcium carbide pyrolysis device through the steam outlet 305. Example 2

[0034] Reference Figure 3-4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that it provides a waste heat recovery device for calcium carbide pyrolysis, comprising:

[0035] A motor 202 is installed on the front of the outer wall of the connecting chamber 201, and a fixing frame 203 is installed on the inner wall of the connecting chamber 201. The fixing frame 203 fixes the reduction gearbox 204 to prevent shaking during use. The reduction gearbox 204 is installed between the fixing frames 203. The upper and lower ends of the reduction gearbox 204 are output ends. Each output end is equipped with an agitator 205. The input end of the reduction gearbox 204 is fixedly connected to the rotor of the motor 202. The motor 202 drives the two agitators 205 to rotate through the reduction gearbox 204 to achieve agitation. The agitation achieves the flow of water inside, thereby enabling more even heating of the water.

[0036] The dust removal assembly 400 includes a dust collector 401, which is fixedly installed on the back of the outer wall of the second boiler body 301. The dust collector 401 has a connecting pipe 402 and a purified gas outlet 403 at both ends. The purified gas outlet 403 is connected to the subsequent acetylene gas purification device to facilitate the output of pure acetylene gas for industrial use. The connecting pipe 402 is connected to the acetylene gas outlet 303 to remove dust from the dust removal assembly 400 and the acetylene gas, reducing the pressure on the subsequent equipment. This device can be well adapted to the calcium carbide processing field, absorbing the excess heat generated by calcium carbide processing and avoiding heat waste.

[0037] This embodiment has the following workflow: During the heating process, the motor 202 is started. When the motor 202 rotates, the gearbox 204 drives the agitator 205 to rotate, and the agitator 205 drives the internal water flow to rotate.

[0038] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to the implementation of the present invention) may be omitted.

[0039] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A waste heat recovery device for calcium carbide pyrolysis, characterized in that: It includes a first boiler assembly (100), a connecting assembly (200) mounted on top of the first boiler assembly (100), and a second boiler assembly (300) mounted on top of the connecting assembly (200). The first boiler assembly (100) includes a first boiler body (101), on the outer wall of the first boiler body (101) are provided an exhaust gas inlet (102) and an exhaust gas outlet (103), the exhaust gas inlet (102) and the exhaust gas outlet (103) are symmetrically distributed on the first boiler body (101); a first heat dissipation pipe (104) is installed between the exhaust gas inlet (102) and the exhaust gas outlet (103), and the first heat dissipation pipe (104) is connected to the exhaust gas inlet (102) and the exhaust gas outlet (103); The connecting assembly (200) includes a connecting compartment (201), the bottom of which is mounted on the top of the first boiler body (101); The second boiler assembly (300) includes a second boiler body (301), which is installed on the top of the connecting compartment (201). An acetylene gas inlet (302) and an acetylene gas outlet (303) are provided on the outer wall of the second boiler body (301). The acetylene gas inlet (302) and the acetylene gas outlet (303) are symmetrically distributed on the second boiler body (301). A second heat dissipation pipe (304) is installed between the acetylene gas inlet (302) and the acetylene gas outlet (303), and the second heat dissipation pipe (304) is connected to the acetylene gas inlet (302) and the acetylene gas outlet (303).

2. The waste heat recovery device for calcium carbide pyrolysis according to claim 1, characterized in that: A motor (202) is installed on the front of the outer wall of the connecting compartment (201), a fixing frame (203) is installed on the inner wall of the connecting compartment (201), and a reduction gearbox (204) is installed between the fixing frames (203).

3. The waste heat recovery device for calcium carbide pyrolysis according to claim 2, characterized in that: The upper and lower ends of the gearbox (204) are both output ends, and each output end is equipped with an agitator (205). The input end of the gearbox (204) is fixedly connected to the rotor of the motor (202). The motor (202) drives the two agitators (205) to rotate through the gearbox (204) to achieve stirring.

4. The waste heat recovery device for calcium carbide pyrolysis according to claim 1, characterized in that: The dust removal assembly (400) includes a dust collector (401) which is fixedly installed on the back side of the outer wall of the second boiler body (301).

5. A waste heat recovery device for calcium carbide pyrolysis according to claim 4, characterized in that: The dust collector (401) is provided with a connecting pipe (402) and a purified gas outlet (403) at both ends, and the connecting pipe (402) is connected to the acetylene gas outlet (303).

6. A waste heat recovery device for calcium carbide pyrolysis according to claim 1, characterized in that: The bottom of the first boiler body (101) is fixedly equipped with a support foot (105).

7. A waste heat recovery device for calcium carbide pyrolysis according to claim 1, characterized in that: A steam outlet (305) is installed on the top of the second boiler body (301), and the steam outlet (305) is connected to the second boiler body (301).

8. A waste heat recovery device for calcium carbide pyrolysis according to claim 1, characterized in that: The number of the first heat pipe (104) and the second heat pipe (304) are both five sets.

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