Method for collecting heat from a calcium carbide furnace flue

Abstract

The application discloses a calcium carbide furnace flue heat collection method, which comprises a waste heat evaporation tank, one end of the waste heat evaporation tank is connected with a calcium carbide furnace flue inlet pipe, the other end of the waste heat evaporation tank is connected with a calcium carbide furnace flue outlet pipe, the calcium carbide furnace flue inlet pipe and the calcium carbide furnace flue outlet pipe are connected through a porous jointer and a middle flue gas guide pipe, and the flue gas guide pipe is located in a water evaporation tank. The calcium carbide furnace flue heat collection method has the flue gas guide pipe located in the water evaporation tank, the flue gas guide pipe is subjected to a downward action when moving downward through the circumferential movement of a cam, moves downward, and moves upward through the elasticity of a corrugated expansion pipe along with the cam, so that the impact of the cam and the water impact in the water tank when the flue gas guide pipe moves and the vibration of the inner wall of the flue gas guide pipe can avoid dust in high-temperature flue gas remaining on the inner wall, achieve a cleaning effect and bring a better use prospect.

Description

Technical Field

[0001] This invention relates to the field of calcium carbide furnace flue gas treatment, and in particular to a method for collecting heat from calcium carbide furnace flue gas. Background Technology

[0002] Currently, my country ranks first in the world in annual calcium carbide production. With the development of calcium carbide production technology, energy-saving technology in the calcium carbide industry has made great progress, and the waste heat generated in the production process has begun to be utilized. However, due to the limitations of calcium carbide production technology and the current level of energy conservation in China, the calcium carbide industry is still a high-energy-consuming and high-polluting industry. A large amount of medium and low-temperature waste heat cannot be fully utilized, resulting in a huge waste of energy. At the same time, due to the high temperature of flue gas, it is also difficult to carry out flue gas dust removal and purification. Therefore, the heat collection technology of calcium carbide furnace flue needs to be further developed.

[0003] Currently, waste heat recovery devices such as water boilers have two technical defects when absorbing high-temperature flue gas from calcium carbide furnace flues. First, the flue gas pipe diameter is large, and the flue gas in the center is unlikely to come into contact with the pipe wall, resulting in poor heat conduction efficiency and poor waste heat absorption. Second, soot and dirt are easily retained or adhered inside the flue gas pipe, forming ash and blockage on the heated surface, which deteriorates the heat transfer of the pipe and seriously affects the thermal efficiency of the pipe. At the same time, it also reduces the local flue gas flow area of ​​the pipe, resulting in excessively high flue gas velocity in that part, which brings certain adverse effects during use. To address these issues, we propose a heat collection method for calcium carbide furnace flues. Summary of the Invention

[0004] The main objective of this invention is to provide a method for collecting heat from the flue of a calcium carbide furnace, which can effectively solve the technical problems of excessively large flue inlet design and residual dust inside the pipe in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for collecting heat from a calcium carbide furnace flue includes a waste heat evaporation box. One end of the waste heat evaporation box is connected to a calcium carbide furnace flue inlet pipe, and the other end of the waste heat evaporation box is connected to a calcium carbide furnace flue outlet pipe. Both the calcium carbide furnace flue inlet pipe and the calcium carbide furnace flue outlet pipe are connected by a multi-hole connector and a flue gas guide pipe in the middle. The flue gas guide pipe is located in an evaporation water tank.

[0007] Preferably, the multi-hole connector includes a threaded connecting sleeve, a narrow sleeve, connector holes, and a corrugated telescopic tube. The threaded connecting sleeve is used for threaded connection with the inlet pipe and outlet pipe of the calcium carbide furnace flue. The narrow sleeve extends outward from the inside of the threaded connecting sleeve and narrows. Several sets of connector holes are arranged side by side at the front end of the narrow sleeve. A corrugated telescopic tube is fixedly sleeved in the connector hole. The lower end of the corrugated telescopic tube is connected to one end of the flue gas guide pipe.

[0008] Preferably, the evaporation water tank is located at the bottom of the waste heat evaporation box, and a water inlet pipe is connected to one side of the bottom of the evaporation water tank. A control valve is installed inside the water inlet pipe.

[0009] Preferably, each set of flue gas guide pipes is provided with a rotating rod above it. The rotating rods are fixed to the brackets by bearing seats at both ends. The brackets extend downward from the top of the waste heat evaporation box and are fixed. There are two sets of brackets, which are arranged symmetrically.

[0010] Preferably, several sets of cams are evenly fitted on the rotating rod, and the flue gas guide pipe is provided with a force-bearing curved surface that contacts the cams. Two sets of sprockets are fitted on each set of rotating rods, and the sprockets of adjacent rotating rods are connected by chains. The outermost sprocket is connected to the motor unit, which serves as the drive source.

[0011] Preferably, a steam collection hood is provided at the top center of the waste heat evaporation box, and a steam delivery pipe is provided horizontally on one side of the steam collection hood.

[0012] Preferably, an induced draft fan is installed on the flue outlet pipe of the calcium carbide furnace.

[0013] Preferably, the inner walls of the waste heat evaporation box, the calcium carbide furnace flue inlet pipe, the calcium carbide furnace flue outlet pipe, and the steam conveying pipe are all provided with a heat insulation layer.

[0014] This invention provides an improved method for heat collection in the flue gas duct of a calcium carbide furnace, which has the following significant improvements and advantages compared with the prior art:

[0015] (1) The flue gas guide pipe is located in the evaporation water tank. The cam makes a circular motion. When it moves downward, it applies a downward force to the flue gas guide pipe, causing it to move downward. Then, the elasticity of the corrugated expansion tube moves upward with the cam. Thus, the impact between the flue gas guide pipe and the cam, as well as the force of the water in the water tank, causes the inner wall of the flue gas guide pipe to vibrate, thereby preventing dust in the high-temperature flue gas from remaining on the inner wall and achieving a cleaning effect.

[0016] (2) Several sets of flue gas guide pipes are arranged side by side on the evaporation surface of the evaporation tank, thereby accelerating the evaporation of water in the tank, replacing a single set of thick guide pipes, avoiding the flue gas in the center from not contacting the pipe wall, reducing weight, and matching the above lifting structure to increase the utilization rate of waste heat.

[0017] (3) The whole method is simple in design, easy to operate, meets the actual use standards, reduces production costs, improves work efficiency, and has a better effect than the traditional method. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of a method for collecting heat from a calcium carbide furnace flue according to the present invention;

[0019] Figure 2 This is an internal view of the present invention;

[0020] Figure 3 This is a detailed structural diagram of the multi-hole connector of the present invention;

[0021] Figure 4 This is a diagram showing the overall dynamic connection of the multiple sets of flue gas guide pipes of the present invention.

[0022] Figure 5 This is a diagram showing the relative positions of the inlet pipe and the cam in the calcium carbide furnace flue of the present invention.

[0023] In the diagram: 1. Waste heat evaporator; 2. Calcium carbide furnace flue inlet pipe; 3. Calcium carbide furnace flue outlet pipe; 4. Multi-hole connector; 5. Flue gas guide pipe; 6. Threaded connecting sleeve; 7. Narrow sleeve; 8. Connector hole; 9. Corrugated expansion pipe; 10. Evaporation water tank; 11. Water inlet pipe; 12. Control valve; 13. Rotating rod; 14. Bearing seat; 15. Cam; 16. Force-bearing curved surface; 17. Sprocket; 18. Chain; 19. Motor unit; 20. Steam collection hood; 21. Steam conveying pipe; 22. Exhaust fan; 23. Support frame. Detailed Implementation

[0024] 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.

[0025] like Figure 1-5 As shown, this embodiment provides a method for collecting heat from a calcium carbide furnace flue, including a waste heat evaporation box 1. One end of the waste heat evaporation box 1 is connected to a calcium carbide furnace flue inlet pipe 2, and the other end of the waste heat evaporation box 1 is connected to a calcium carbide furnace flue outlet pipe 3. Both the calcium carbide furnace flue inlet pipe 2 and the calcium carbide furnace flue outlet pipe 3 are connected to a multi-hole connector 4 and a flue gas guide pipe 5 in the middle. The flue gas guide pipe 5 is located in the evaporation water tank 10.

[0026] Specifically, the multi-hole connector 4 includes a threaded connecting sleeve 6, a narrow sleeve 7, a connector hole 8, and a corrugated expansion tube 9.

[0027] In this embodiment, the threaded connecting sleeve 6 is used to connect with the pipe openings of the calcium carbide furnace flue inlet pipe 2 and the calcium carbide furnace flue outlet pipe 3 by thread, and the narrow sleeve 7 extends outward from the inside of the threaded connecting sleeve 6, becoming narrower.

[0028] In this embodiment, several sets of connector holes 8 are arranged side by side at the front end of the narrow sleeve 7. A corrugated expansion tube 9 is fixedly sleeved inside the connector hole 8. The lower end of the corrugated expansion tube 9 is connected to one end of the flue gas guide tube 5. The corrugated expansion tube 9 has elasticity and automatically returns to its original state after being pulled back under force.

[0029] Furthermore, the evaporation tank 10 is located at the bottom of the waste heat evaporation box 1. A water inlet pipe 11 is connected to one side of the bottom of the evaporation tank 10. A control valve 12 is installed inside the water inlet pipe 11 to control the water supply.

[0030] In this embodiment, a rotating rod 13 is provided above each set of flue gas guide pipes 5. The rotating rods 13 are fixed to the brackets 23 by bearing seats 14 at both ends. The brackets 23 extend downward from the top of the waste heat evaporation box 1 and are fixed. There are two sets of brackets 23, which are arranged symmetrically.

[0031] In this embodiment, a number of cams 15 are uniformly sleeved on the rotating rod 13, and a force-bearing curved surface 16 that contacts the cams 15 is provided on the flue gas guide pipe 5.

[0032] Furthermore, each set of rotating rods 13 is fitted with two sets of sprockets 17. The sprockets 17 of adjacent rotating rods 13 are connected by chains 18. The outermost sprocket 17 is connected to the motor set 19, which serves as the driving source.

[0033] In this embodiment, a steam collection hood 20 is provided at the top center of the waste heat evaporation box 1, and a steam conveying pipe 21 extends horizontally on one side of the steam collection hood 20.

[0034] In this embodiment, an induced draft fan 22 is installed on the flue outlet pipe 3 of the calcium carbide furnace to induce the flue gas.

[0035] In this embodiment, the inner walls of the waste heat evaporation box 1, the calcium carbide furnace flue inlet pipe 2, the calcium carbide furnace flue outlet pipe 3, and the steam conveying pipe 21 are all provided with a heat insulation layer.

[0036] In this embodiment, during use, the high-temperature flue gas from the calcium carbide furnace enters the furnace flue inlet pipe 2, and is then evenly dispersed by the multi-hole connector 4, entering their respective flue gas guide pipes 5. The flue gas guide pipes 5 are located within the evaporation tank 10, where heat conduction evaporates the water, forming high-temperature steam. This steam overflows upwards at the evaporation interface and enters the steam collection hood 20, then is slowly discharged from the steam delivery pipe 21. Simultaneously, the motor of the motor unit 19 is started, and through the sprocket structure, all the rotating rods 1 are driven together. 3. Synchronous motion: The cam 15 on the rotating rod 13 makes a circular motion. When it moves downward, it applies a downward force to the flue gas guide pipe 5, causing it to move downward. Then, through the elasticity of the corrugated telescopic pipe 9, it moves upward with the cam 15. Thus, the impact of the flue gas guide pipe 5 with the cam and the force of the water in the water tank cause the inner wall of the flue gas guide pipe 5 to vibrate, thereby preventing dust in the high-temperature flue gas from remaining on the inner wall and achieving a cleaning effect. Afterward, the flue gas in the flue gas guide pipe 5 is discharged from the calcium carbide furnace flue outlet pipe 3 and enters the bag filter.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] 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. A heat collection device for a calcium carbide furnace flue, comprising a waste heat evaporation box (1), characterized in that: One end of the waste heat evaporation box (1) is connected to the inlet pipe (2) of the calcium carbide furnace flue, and the other end of the waste heat evaporation box (1) is connected to the outlet pipe (3) of the calcium carbide furnace flue. The inlet pipe (2) and the outlet pipe (3) of the calcium carbide furnace flue are connected to the flue gas guide pipe (5) in the middle through a multi-hole connector (4). The flue gas guide pipe (5) is located in the evaporation water tank (10). The multi-hole connector (4) includes a threaded connecting sleeve (6), a narrow sleeve (7), a connector hole (8), and a corrugated telescopic tube (9). The threaded connecting sleeve (6) is used to connect with the pipe openings of the inlet pipe (2) and the outlet pipe (3) of the calcium carbide furnace flue. The narrow sleeve (7) extends outward from the inside of the threaded connecting sleeve (6) and narrows outward. Several sets of connector holes (8) are arranged side by side at the front end of the narrow sleeve (7). The corrugated telescopic tube (9) is fixedly sleeved inside the connector hole (8). The lower end of the corrugated telescopic tube (9) is connected to one end of the flue gas guide pipe (5). The evaporation tank (10) is located at the bottom of the waste heat evaporation box (1). A water inlet pipe (11) is connected to one side of the bottom of the evaporation tank (10). A control valve (12) is installed inside the water inlet pipe (11). Each set of flue gas guide pipes (5) is provided with a rotating rod (13) above it. The rotating rods (13) are fixed to the brackets (23) by bearing seats (14) at both ends. The brackets (23) extend downward from the top of the waste heat evaporation box (1) and are fixed. There are two sets of brackets (23) in total, which are symmetrically arranged. Several sets of cams (15) are evenly fitted on the rotating rod (13). The flue gas guide pipe (5) is provided with a force-bearing curved surface (16) that contacts the cams (15). Two sets of sprockets (17) are fitted on each set of rotating rods (13). The sprockets (17) of adjacent rotating rods (13) are connected by a chain (18). The outermost sprocket (17) is connected to the motor set (19), which serves as the driving source.

2. The heat collection device for a calcium carbide furnace flue according to claim 1, characterized in that: A steam collection hood (20) is provided at the top center of the waste heat evaporation box (1), and a steam delivery pipe (21) extends horizontally on one side of the steam collection hood (20).

3. The heat collection device for a calcium carbide furnace flue according to claim 2, characterized in that: An induced draft fan (22) is installed on the flue outlet pipe (3) of the calcium carbide furnace.

4. The heat collection device for a calcium carbide furnace flue according to claim 3, characterized in that: The inner walls of the waste heat evaporation box (1), the calcium carbide furnace flue inlet pipe (2), the calcium carbide furnace flue outlet pipe (3), and the steam conveying pipe (21) are all provided with a heat insulation layer.

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