Energy-saving and environment-friendly calcium carbide furnace

Abstract

The application discloses an energy-saving and environment-friendly calcium carbide furnace, which comprises an environment-friendly and energy-saving outer wall protection furnace surrounding assembly, wherein the environment-friendly and energy-saving outer wall protection furnace surrounding assembly is arranged outside a calcium carbide furnace assembly; a furnace inner pressure relief protection assembly is arranged on the top of the calcium carbide furnace assembly; and the environment-friendly and energy-saving outer wall protection furnace surrounding assembly forms a high-temperature flue gas heat exchange and heat preservation structure outside the calcium carbide furnace assembly. When the water temperature in the environment-friendly and energy-saving outer wall protection furnace surrounding assembly is increased, the gas in the copper pipe of the base is heated and expanded, at this time, the top piston is driven to move upwards, at this time, the guide outer sleeve seat pipe is moved upwards outside the guide shaft, due to the cooperation between the seat pipe convex sliding rod and the spiral sliding groove, at this time, the cold water inlet ball head is rotated in the cold water inlet ball pipe, at this time, the water inlet ball groove is opposite to the cold water inlet pipe to form a cold water conveying structure, the larger the slot opposite to the cold water inlet pipe and the water inlet ball groove, the more the cold water conveyed into the protection furnace surrounding interior by the cold water inlet pipe in unit time.

Description

Technical Field

[0001] This invention belongs to the field of calcium carbide furnace technology, and specifically relates to an energy-saving and environmentally friendly calcium carbide furnace. Background Technology

[0002] The calcium carbide furnace is the main equipment for producing calcium carbide. Inside the furnace, a high-temperature electric arc is emitted from the electrodes to melt the furnace charge and react to produce calcium carbide. During the reaction, high-temperature flue gas is generated. If the flue gas is directly discharged, a large amount of heat will also be emitted along with the flue gas, which will pollute the environment and waste resources.

[0003] The existing technology has the following problems: How to utilize the heat in high-temperature flue gas is an important research direction. Currently, water circulation is used to reuse the heat in the flue gas. Existing calcium carbide furnaces are equipped with a water circulation insulation layer on the outside. On the one hand, it utilizes the heat in the flue gas, and on the other hand, it insulates the calcium carbide furnace and improves the processing quality inside the furnace. However, in actual use, we have found that in order to ensure the continuous heat absorption of the water circulation, the water circulation temperature must be kept at a heat-absorbing water temperature. At the same time, this water temperature cannot be too low. Otherwise, the excessively low water temperature will absorb the heat of the calcium carbide furnace, thereby affecting the efficiency and quality of the reaction inside the furnace. In addition, existing devices mostly use sensors and controllers to control the water circulation. This approach leads to high actual use and maintenance costs. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an energy-saving and environmentally friendly calcium carbide furnace that effectively utilizes high-temperature flue gas and features safety protection.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving and environmentally friendly calcium carbide furnace, comprising an environmentally friendly and energy-saving outer wall protective furnace enclosure assembly, wherein the environmentally friendly and energy-saving outer wall protective furnace enclosure assembly is disposed outside the calcium carbide furnace assembly, wherein an internal pressure relief protection assembly is disposed on the top of the calcium carbide furnace assembly, wherein the environmentally friendly and energy-saving outer wall protective furnace enclosure assembly forms a high-temperature flue gas heat exchange and insulation structure outside the calcium carbide furnace assembly, and wherein the internal pressure relief protection assembly forms an automatic pressure relief and exhaust structure on the top of the calcium carbide furnace assembly;

[0006] The environmentally friendly and energy-saving outer wall protective furnace enclosure assembly includes a protective furnace enclosure and a mounting top cap tube. Multiple high-temperature flue gas heat exchange tubes are installed on the inner wall of the protective furnace enclosure. Heat exchange outlet pipes are installed at both ends of each high-temperature flue gas heat exchange tube. Hot water drain pipes and cold water inlet pipes are installed on the top and one side of the protective furnace enclosure. A cold water inlet ball pipe is installed on the cold water inlet pipe, and a cold water inlet ball head is rotatably installed inside the cold water inlet ball pipe. The cold water inlet ball head is provided with an inlet ball groove, and the top of the cold water inlet ball head... A rotating shaft is fixedly installed on the part, and a guide shaft is fixedly installed on the top of the rotating shaft. A spiral groove is provided on the guide shaft. A base copper tube is fixedly installed at the bottom of the mounting top cap tube, and a support arm slide rod is slidably installed through the mounting top cap tube. A clamping piston and a clamping platform are provided at the bottom of the support arm slide rod, and a guide sleeve seat tube is provided at the top of the support arm slide rod. A seat tube protruding slide rod is provided on the inner wall of the guide sleeve seat tube, and a clamping spring is sleeved on the top rod of the support arm slide rod.

[0007] Preferably, the furnace pressure relief protection assembly includes a furnace pressure relief protection cylinder, the bottom of which is provided with a bottom flange and a pressure relief port, and a sealing ring platform is fixedly provided at the bottom of the inner cavity of the furnace pressure relief protection cylinder. A push rod is slidably provided through the top of the furnace pressure relief protection cylinder, and a sealing top pressure platform is fixedly provided at the bottom of the push rod, and a push spring is sleeved on the push rod.

[0008] The calcium carbide furnace assembly includes a bottom furnace, a top cover, an internal electrode, a top cover mounting flange, and a high-temperature flue gas exhaust pipe.

[0009] Preferably, the bottom surface of the mounting top cap tube is fixedly set on the top of the protective furnace enclosure, the support arm slide rod slides up and down through the mounting top cap tube, the clamping piston slides up and down inside the base copper tube, the clamping platform slides up and down inside the mounting top cap tube, and the two ends of the clamping spring abut against the clamping platform and the top of the mounting top cap tube respectively. Through the pushing of the clamping spring, the clamping piston naturally moves downward.

[0010] Preferably, a cavity is provided between the clamping piston and the bottom tube of the base copper tube, and the cavity is filled with a gas with a high thermal coefficient. When the ambient temperature rises, the gas with a high thermal coefficient in the base copper tube forms an upward pushing structure on the clamping piston.

[0011] Preferably, the guide sleeve is fitted over the outside of the guide shaft and slides up and down outside the guide shaft, the convex slide rod of the sleeve is inserted into the spiral groove on the guide shaft, and the rotating shaft is rotatably connected to the top of the cold water inlet ball pipe through a bearing seat.

[0012] Preferably, the cold water inlet ball head forms a rotating ball valve structure inside the cold water inlet ball pipe, and the inlet ball groove is directly opposite the cold water inlet pipe to form a cold water delivery structure. The larger the groove opening of the cold water inlet pipe and the inlet ball groove, the more cold water is delivered into the protective furnace enclosure by the cold water inlet pipe per unit time.

[0013] Preferably, the protective furnace enclosure is set outside the calcium carbide furnace bottom, and a cold water heat exchange cavity is formed between the protective furnace enclosure and the outer wall of the calcium carbide furnace bottom. Water for exchanging heat with the high-heat flue gas discharged from the calcium carbide furnace components is introduced into the cold water heat exchange cavity, and the end of the cold water inlet pipe is connected to the water supply pressurization tank.

[0014] Preferably, the bottom of the furnace pressure relief protection cylinder is installed on the top of the calcium carbide furnace top cover via a bottom flange and a top cover mounting flange. The push sliding rod slides through the top of the furnace pressure relief protection cylinder. The two ends of the push spring abut against the sealing top pressure base and the top of the furnace pressure relief protection cylinder, respectively. Through the push of the push spring, the sealing top pressure base abuts against and seals the top of the sealing ring platform.

[0015] When encountering violent reactions within the calcium carbide furnace components, this invention discharges the high-temperature flue gas that has not been released in time through the pressure relief port, ensuring the safety and reliability of the calcium carbide furnace components during actual use. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is an exploded view of the present invention;

[0019] Figure 4 This is an exploded cross-sectional view of the present invention;

[0020] Figure 5 This is a perspective view of the environmentally friendly and energy-saving outer wall protective furnace enclosure component of the present invention;

[0021] Figure 6 This is an exploded view of the environmentally friendly and energy-saving outer wall protective furnace enclosure component of the present invention;

[0022] Figure 7 This is a cross-sectional view of the furnace pressure relief protection component of the present invention;

[0023] Figure 8 This is a perspective view of the calcium carbide furnace assembly of the present invention;

[0024] In the diagram: 100. Environmentally friendly and energy-saving outer wall protective furnace enclosure assembly; 101. Protective furnace enclosure; 102. High-temperature flue gas heat exchange tube; 103. Hot water drain pipe; 104. Cold water inlet pipe; 105. Cold water inlet ball pipe; 106. Cold water inlet ball head; 107. Inlet ball groove; 108. Rotating shaft; 109. Guide shaft; 110. Spiral slide groove; 111. Guide outer sleeve seat tube; 112. Seat tube convex slide rod; 113. Support arm slide rod; 114. Mounting top cap tube; 115. Tightening spring; 116. 117. Tightening platform; 118. Tightening piston; 119. Base copper tube; 110. Heat exchange outlet pipe; 201. Furnace internal pressure relief protection assembly; 202. Furnace internal pressure relief protection cylinder; 203. Pressure relief port; 204. Bottom flange; 205. Sealing ring platform; 206. Sealing top pressure base platform; 207. Push spring; 208. Push slide rod; 300. Calcium carbide furnace assembly; 301. Calcium carbide furnace bottom furnace; 302. Calcium carbide furnace top cover; 303. Furnace internal electrode; 304. Top cover mounting flange; 305. High-temperature flue gas discharge pipe. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-8 The present invention provides the following technical solution: an energy-saving and environmentally friendly calcium carbide furnace, including an environmentally friendly and energy-saving outer wall protective furnace enclosure component 100, the environmentally friendly and energy-saving outer wall protective furnace enclosure component 100 being disposed outside a calcium carbide furnace assembly 300, and an internal pressure relief protection component 200 being disposed on the top of the calcium carbide furnace assembly 300; the environmentally friendly and energy-saving outer wall protective furnace enclosure component 100 forming a high-temperature flue gas heat exchange and insulation structure outside the calcium carbide furnace assembly 300, and the internal pressure relief protection component 200 forming an automatic pressure relief and exhaust structure on the top of the calcium carbide furnace assembly 300;

[0027] The environmentally friendly and energy-saving outer wall protective furnace enclosure assembly 100 includes a protective furnace enclosure 101 and a mounting top cap tube 114. Multiple high-temperature flue gas heat exchange tubes 102 are installed on the inner wall of the protective furnace enclosure 101. Each high-temperature flue gas heat exchange tube 102 has a heat exchange outlet pipe 119 at both ends. A hot water drain pipe 103 and a cold water inlet pipe 104 are installed on the top and one side of the protective furnace enclosure 101. A cold water inlet ball pipe 105 is installed on the cold water inlet pipe 104. A cold water inlet ball head 106 is rotatably installed inside the cold water inlet ball pipe 105. An inlet ball groove 107 is provided on the cold water inlet ball head 106, and a rotating shaft 10 is fixedly installed on the top of the cold water inlet ball head 106. 8. A guide shaft 109 is fixedly installed at the top of the rotating shaft 108. A spiral groove 110 is provided on the guide shaft 109. A base copper tube 118 is fixedly installed at the bottom of the mounting top cap tube 114. A support arm slide rod 113 is slidably installed through the mounting top cap tube 114. A clamping piston 117 and a clamping platform 116 are provided at the bottom of the support arm slide rod 113. A guide sleeve seat tube 111 is provided at the top of the support arm slide rod 113. A seat tube convex slide rod 112 is provided on the inner wall of the guide sleeve seat tube 111. A clamping spring 115 is sleeved on the top rod of the support arm slide rod 113. The clamping piston 117 and the bottom tube of the base copper tube 118 are connected. A cavity is provided between the two, and the cavity is filled with a gas with a high thermal coefficient. When the ambient temperature rises, the gas with a high thermal coefficient in the base copper tube 118 forms a pushing structure that pushes the piston 117 upward. The guide sleeve seat tube 111 is sleeved on the outside of the guide shaft 109 and slides up and down on the outside of the guide shaft 109. The seat tube convex slide rod 112 is inserted into the spiral slide groove 110 on the guide shaft 109. The rotating shaft 108 is rotatably connected to the top of the cold water inlet ball tube 105 through the bearing seat. The cold water inlet ball head 106 forms a rotating ball valve structure in the cold water inlet ball tube 105. The inlet ball groove 107 is directly opposite the cold water inlet pipe 104 to form a cold water delivery structure. The larger the opening of the cold water inlet pipe 104 and the water inlet ball groove 107, the more cold water the cold water inlet pipe 104 sends into the protective furnace enclosure 101 per unit time. The bottom surface of the mounting top cap tube 114 is fixedly set on the top of the protective furnace enclosure 101. The support arm slide rod 113 slides up and down through the mounting top cap tube 114. The pressing piston 117 slides up and down in the base copper tube 118. The pressing platform 116 slides up and down in the mounting top cap tube 114. The two ends of the pressing spring 115 abut against the top of the pressing platform 116 and the top of the mounting top cap tube 114 respectively. Through the pushing of the pressing spring 115, the pressing piston 117 naturally moves downward.

[0028] The furnace pressure relief protection assembly 200 includes a furnace pressure relief protection cylinder 201. The bottom of the furnace pressure relief protection cylinder 201 is provided with a bottom flange 203 and a pressure relief port 202. A sealing ring platform 204 is fixedly provided at the bottom of the inner cavity of the furnace pressure relief protection cylinder 201. A push rod 207 is slidably provided through the top of the furnace pressure relief protection cylinder 201. A sealing top pressure platform 205 is fixedly provided at the bottom of the push rod 207. A push spring 206 is sleeved on the push rod 207.

[0029] The calcium carbide furnace assembly 300 includes a calcium carbide furnace bottom furnace 301. A calcium carbide furnace top cover 302 is provided on the top of the calcium carbide furnace bottom furnace 301. An in-furnace electrode 303, a top cover mounting flange 304, and a high-temperature flue gas exhaust pipe 305 are provided on the top cover 302. The bottom of the in-furnace pressure relief protection cylinder 201 is installed on the top of the calcium carbide furnace top cover 302 through the bottom flange 203 and the top cover mounting flange 304. The push sliding rod 207 slides through the top of the in-furnace pressure relief protection cylinder 201. The two ends of the push spring 206 abut against the sealing top pressure base 205 and the top of the in-furnace pressure relief protection cylinder 201, respectively. Through the push of the push spring 206, the sealing top pressure base 205 abuts against and seals against the top of the sealing ring platform 204.

[0030] The working principle and usage process of this invention: When this invention is used, the furnace electrode 303 inside the calcium carbide furnace assembly 300 emits a high-temperature electric arc to melt the furnace charge and generate calcium carbide. During the reaction, high-temperature flue gas is generated. This high-temperature flue gas is then sent into the high-temperature flue gas heat exchange tube 102 through the high-temperature flue gas discharge pipe 305. In actual use, the protective furnace enclosure 101 is set outside the calcium carbide furnace bottom furnace 301. A cold water heat exchange cavity is formed between the protective furnace enclosure 101 and the outer wall of the calcium carbide furnace bottom furnace 301. Water is introduced into the cold water heat exchange cavity to exchange heat with the high-heat flue gas discharged from the calcium carbide furnace assembly 300. The end of the cold water inlet pipe 104 is connected to a water pressurization tank. This achieves environmentally friendly and energy-saving heat exchange between the water and the high-heat flue gas inside the protective furnace enclosure assembly 100. This method achieves energy-saving and environmentally friendly heat exchange. Simultaneously, the environmentally friendly and energy-saving outer wall protective furnace enclosure component 100 is installed outside the calcium carbide furnace assembly 300. High-heat flue gas heats the water inside the environmentally friendly and energy-saving outer wall protective furnace enclosure component 100, thereby heating and insulating the exterior of the calcium carbide furnace assembly 300, thus maintaining the internal reaction environment of the calcium carbide furnace assembly 300. The bottom surface of the mounting top cap tube 114 is fixedly installed on the top of the protective furnace enclosure 101. The support arm slide rod 113 slides up and down through the mounting top cap tube 114. The clamping piston 117 slides up and down inside the base copper tube 118. The clamping platform 116 slides up and down inside the mounting top cap tube 114. The two ends of the clamping spring 115 respectively abut against the clamping platform 116 and the mounting top cap tube 114. At the top, the pressing piston 117 naturally moves downwards due to the pushing force of the pressing spring 115. A cavity is provided between the pressing piston 117 and the bottom tube of the base copper tube 118, and the cavity is filled with a gas with a high thermal coefficient. When the ambient temperature rises, the gas with a high thermal coefficient in the base copper tube 118 forms a pushing structure that pushes the pressing piston 117 upwards. The guide sleeve seat tube 111 is sleeved on the outside of the guide shaft 109 and slides up and down on the outside of the guide shaft 109. The seat tube convex slide rod 112 is inserted into the spiral slide groove 110 on the guide shaft 109. The rotating shaft 108 is rotatably connected to the top of the cold water inlet ball tube 105 through the bearing seat. The cold water inlet ball head 106 forms a rotating ball valve structure inside the cold water inlet ball tube 105. In actual use, when the environmentally friendly and energy-saving outer wall When the water temperature inside the protective furnace enclosure component 101 is too high, it will not absorb heat from the subsequent high-temperature flue gas. At this time, the water needs to be cooled to ensure the quality of heat exchange with the high-temperature flue gas. When the water temperature inside the environmentally friendly and energy-saving outer wall protective furnace enclosure component 101 rises, the gas inside the base copper tube 118 expands due to heat, causing the pressing piston 117 to move upwards. At this time, the guide sleeve seat tube 11 moves upwards outside the guide shaft 109. Due to the cooperation of the seat tube convex sliding rod 112 and the spiral sliding groove 110, the cold water inlet ball head 106 rotates inside the cold water inlet ball pipe 105. At this time, the inlet ball groove 107 and the cold water inlet pipe 104 are directly opposite each other, forming a cold water delivery structure. The larger the opening of the groove between the cold water inlet pipe 104 and the inlet ball groove 107, the faster the water delivery per unit time.The more cold water is supplied into the protective furnace enclosure 101 through the cold water inlet pipe 104, the more the pressure relief protective cylinder 201 inside the furnace is installed on top of the calcium carbide furnace top cover 302 via the bottom flange 203 and the top cover mounting flange 304. The push-pull slide rod 207 slides through the top of the pressure relief protective cylinder 201 inside the furnace. The two ends of the push-pull spring 206 respectively abut against the sealing top pressure base 205 and the top of the pressure relief protective cylinder 201 inside the furnace. Through the push of the push-pull spring 206, the sealing top pressure base 205 abuts against the top of the sealing ring platform 204. In this way, when encountering violent reactions inside the calcium carbide furnace assembly 300, the high-temperature flue gas causes an increase in internal pressure. When the calcium carbide furnace assembly 300 is used, it is necessary to ensure that the pressure inside the furnace is not too high. At this time, the high pressure inside the furnace will overcome the force of the push-pull spring 206, so that the high-temperature flue gas that has not been discharged in time can be discharged through the pressure relief port 202, ensuring the safety and reliability of the calcium carbide furnace assembly 300 in actual use.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving and environmentally friendly calcium carbide furnace, comprising an environmentally friendly and energy-saving outer wall protective furnace enclosure assembly (100), characterized in that: The environmentally friendly and energy-saving outer wall protective furnace enclosure component (100) is installed outside the calcium carbide furnace component (300). The top of the calcium carbide furnace component (300) is provided with an in-furnace pressure relief protection component (200). The environmentally friendly and energy-saving outer wall protective furnace enclosure component (100) forms a high-temperature flue gas heat exchange and insulation structure outside the calcium carbide furnace component (300). The in-furnace pressure relief protection component (200) forms an automatic pressure relief and exhaust structure on the top of the calcium carbide furnace component (300). The environmentally friendly and energy-saving outer wall protective furnace enclosure assembly (100) includes a protective furnace enclosure (101) and a mounting top cap tube (114). Multiple high-temperature flue gas heat exchange tubes (102) are provided on the inner wall of the protective furnace enclosure (101). Heat exchange outlet pipes (119) are provided at both ends of the high-temperature flue gas heat exchange tubes (102). Hot water drain pipes (103) and cold water inlet pipes (104) are provided on the top and one side of the protective furnace enclosure (101). A cold water inlet ball pipe (105) is provided on the cold water inlet pipe (104). A cold water inlet ball head (106) is rotatably provided inside the cold water inlet ball pipe (105). A water inlet ball groove (107) is provided on the cold water inlet ball head (106), and the top of the cold water inlet ball head (106) is fixed. A rotating shaft (108) is provided, and a guide shaft (109) is fixedly provided on the top of the rotating shaft (108). A spiral groove (110) is provided on the guide shaft (109). A base copper tube (118) is fixedly provided at the bottom of the mounting top cap tube (114). A support arm slide rod (113) is slidably provided through the mounting top cap tube (114). A clamping piston (117) and a clamping platform (116) are provided at the bottom of the support arm slide rod (113). A guide sleeve seat tube (111) is provided at the top of the support arm slide rod (113). A seat tube convex slide rod (112) is provided on the inner wall of the guide sleeve seat tube (111). A clamping spring (115) is sleeved on the top rod of the support arm slide rod (113). A cavity is provided between the top-pressing piston (117) and the bottom tube of the base copper tube (118). The cavity is filled with a gas with a high thermal coefficient. When the ambient temperature rises, the gas with a high thermal coefficient in the base copper tube (118) forms an upward pushing structure on the top-pressing piston (117).

2. The energy-saving and environmentally friendly calcium carbide furnace according to claim 1, characterized in that: The furnace pressure relief protection assembly (200) includes a furnace pressure relief protection cylinder (201). The bottom of the furnace pressure relief protection cylinder (201) is provided with a bottom flange (203) and a pressure relief port (202). A sealing ring platform (204) is fixedly provided at the bottom of the inner cavity of the furnace pressure relief protection cylinder (201). A push rod (207) is slidably provided through the top of the furnace pressure relief protection cylinder (201). A sealing top pressure platform (205) is fixedly provided at the bottom of the push rod (207). A push spring (206) is sleeved on the push rod (207). The calcium carbide furnace assembly (300) includes a calcium carbide furnace bottom furnace (301), and a calcium carbide furnace top cover (302) is provided on the top of the calcium carbide furnace bottom furnace (301). The calcium carbide furnace top cover (302) is provided with an in-furnace electrode (303), a top cover mounting flange (304) and a high-temperature flue gas exhaust pipe (305).

3. The energy-saving and environmentally friendly calcium carbide furnace according to claim 1, characterized in that: The bottom surface of the mounting top cap tube (114) is fixedly set on the top of the protective furnace enclosure (101). The support arm slide rod (113) slides up and down through the mounting top cap tube (114). The clamping piston (117) slides up and down inside the base copper tube (118). The clamping platform (116) slides up and down inside the mounting top cap tube (114). The two ends of the clamping spring (115) abut against the top of the clamping platform (116) and the top of the mounting top cap tube (114) respectively. Through the push of the clamping spring (115), the clamping piston (117) naturally moves downward.

4. The energy-saving and environmentally friendly calcium carbide furnace according to claim 1, characterized in that: The guide sleeve seat tube (111) is sleeved on the outside of the guide shaft (109) and slides up and down on the outside of the guide shaft (109). The seat tube convex slide rod (112) is inserted into the spiral slide groove (110) on the guide shaft (109). The rotating shaft (108) is rotatably connected to the top of the cold water inlet ball pipe (105) through the bearing seat.

5. The energy-saving and environmentally friendly calcium carbide furnace according to claim 1, characterized in that: The cold water inlet ball head (106) forms a rotating ball valve structure inside the cold water inlet ball pipe (105). The inlet ball groove (107) and the cold water inlet pipe (104) are directly opposite each other to form a cold water delivery structure. The larger the groove opening of the cold water inlet pipe (104) and the inlet ball groove (107) are, the more cold water the cold water inlet pipe (104) delivers into the protective furnace enclosure (101) per unit time.

6. The energy-saving and environmentally friendly calcium carbide furnace according to claim 2, characterized in that: The protective furnace enclosure (101) is set outside the calcium carbide furnace bottom furnace (301). A cold water heat exchange cavity is formed between the protective furnace enclosure (101) and the outer wall of the calcium carbide furnace bottom furnace (301). Water for exchanging heat with the high-heat flue gas discharged from the calcium carbide furnace assembly (300) is introduced into the cold water heat exchange cavity. The end of the cold water inlet pipe (104) is connected to the water supply pressurization tank.

7. The energy-saving and environmentally friendly calcium carbide furnace according to claim 2, characterized in that: The bottom of the furnace pressure relief protective cylinder (201) is installed on the top of the calcium carbide furnace top cover (302) through the bottom flange (203) and the top cover mounting flange (304). The push sliding rod (207) slides through the top of the furnace pressure relief protective cylinder (201). The two ends of the push spring (206) abut against the sealing top pressure base (205) and the top of the furnace pressure relief protective cylinder (201) respectively. Through the push of the push spring (206), the sealing top pressure base (205) abuts against and seals the top of the sealing ring platform (204).

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