High-temperature-resistant material level detection purging device applied to ash bucket of electric furnace waste heat recovery system

Abstract

A high-temperature-resistant material level detecting and purging device applied to an ash bucket of an electric furnace waste heat recovery system comprises a Venturi tube, a blowing pipe, a blowing pipe, a blowing pipe, a blowing pipe and a blowing pipe, and the Venturi tube comprises an inlet section, a throat pipe section and an outlet section; the diameter of the inlet section is larger than that of the outlet section; the outlet section pipeline is provided with a control valve; a port in the middle of the three-way pipe is communicated with the throat pipe section of the Venturi pipe; the inlet end of the purging pipe is connected to the port of the outlet section of the Venturi pipe; a plurality of purging openings are formed in the purging pipe along a pipe body; one end of the detection pipe is connected to the front port of the three-way pipe, and the other port, extending into the ash hopper, of the detection pipe is provided with a horn mouth with a downward opening; the control assembly comprises a piston, an upper push rod and a spring; the piston and the push rod on the piston are arranged in a rear port of the three-way pipe; the spring sleeves the push rod, and the front end of the spring abuts against the piston. According to the utility model, the problem that an electronic level gage cannot be mounted on high-temperature equipment is solved, so that the device has the characteristics of dust hopper inner wall purging function and high-temperature working condition resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnaces, in particular to a high-temperature resistant material level detection and purge device applied to an ash hopper of a waste heat recovery system of an electric furnace. Background Art

[0002] At present, a paddle-type level meter is installed on the ash hopper of the waste heat recovery system of the electric furnace, which is installed on the side of the ash hopper. When the dust accumulated in the ash hopper reaches the working position of the level meter, the level meter signal is triggered, and the signal feedback and interlocking functions are realized.

[0003] The current rotary paddle level meter is not resistant to high temperatures because of the electronic components inside. The failure rate is extremely high in the high temperature environment of over 300 degrees in the electric furnace waste heat recovery system, which greatly increases the normal functional state of the level meter. The reliability and adaptability cannot meet the requirements of on-site use.

[0004] The inner wall of the ash hopper is prone to compaction due to factors such as climate temperature. Since the ash hopper is in a closed state, it is impossible to clean the compacted material inside the ash hopper from outside the ash hopper. Summary of the invention

[0005] The purpose of the utility model is to provide a high-temperature resistant material level detection and purge device applied to the ash hopper of the waste heat recovery system of an electric furnace, which solves the problem that the electronic material level meter cannot be installed on the high-temperature equipment, so that the device has both the function of purging the inner wall of the ash hopper and the characteristics of high-temperature resistance.

[0006] In order to achieve the above object, the technical solution of the utility model is:

[0007] A high temperature resistant material level detection and purge device applied to an ash hopper of an electric furnace waste heat recovery system, comprising:

[0008] The venturi tube comprises an inlet section, a throat section and an outlet section; the diameter of the inlet section is larger than the diameter of the outlet section, and the diameter of the throat section is smaller than the diameter of the outlet section; a control valve is provided in the outlet section pipeline;

[0009] A tee pipe, the port in the middle of which is connected to the throat section of the venturi pipe;

[0010] A purge pipe, the inlet end of which is connected to the outlet port of the venturi tube; a plurality of purge ports are arranged along the pipe body of the purge pipe;

[0011] The detection tube has one end connected to the front port of the tee pipe, and the other end of the detection tube extending into the ash hopper is provided with a bell mouth opening downward;

[0012] The control component comprises a piston, an upper push rod and a spring; the piston and the upper push rod are arranged in the rear port of the three-way pipe; the spring is sleeved on the push rod, and its front end abuts against the piston.

[0013] Preferably, the purge pipe has three sections, is U-shaped, and is arranged around three inner walls of the ash hopper.

[0014] Preferably, at least three purge ports are arranged on the purge pipe corresponding to each inner wall in the ash hopper.

[0015] Preferably, the purge port of the purge pipe is provided with a purge pipe with a Laval tube, a purge pipe with a bell mouth, or a round tube.

[0016] Preferably, the control valve is a ball valve.

[0017] The utility model realizes the pressure difference in the pipe by using the venturi tube through the pressure difference generated when the compressed air flows through two pipes with different diameters, and achieves the mechanical interlocking action through the pressure difference, thereby playing the role of material level detection, and at the same time, the compressed air is passed into the air holes in the pipeline of the ash hopper to purge the inner wall of the ash hopper, so as to clean the compacted material on the inner wall of the ash hopper.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model is installed on the side of the ash hopper for waste heat recovery. Since it has no electronic components and is a purely mechanical operation structure, it can withstand a high temperature environment of more than 300 degrees, overcoming the difficulty that the existing waste heat recovery ash hopper level meter cannot withstand high temperature conditions. The pressure difference in the Venturi tube is used to achieve the displacement of the mechanical structure, thereby completing the output of the signal.

[0020] 2. The utility model realizes the mechanical displacement of the piston limit push rod through the pressure difference generated by the venturi tube, thereby achieving the function of monitoring the ash accumulation in the ash hopper.

[0021] 3. The utility model is provided with a compressed air pipeline purge port on the inner wall edge of the ash hopper, which can regularly purge the ash accumulated on the inner wall of the ash hopper, thereby playing the role of cleaning the plated material on the inner wall of the ash hopper.

[0022] 4. The utility model has a simple design structure, is easy to disassemble and install quickly on site, and has light and durable materials with strong versatility. It is especially suitable for the metallurgical industry with a tight production rhythm, and gives full play to the characteristics of this patent, which is small, fast and flexible.

[0023] 5. The entire design structure of the utility model is balanced in force, the mechanical structure is not affected by temperature, the operation is reliable and stable, and the ash accumulation inside the ash hopper can be effectively guaranteed, and continuous detection and monitoring can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a purge pipe in an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the control component in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] See also Figure 1 to Figure 3 The high temperature resistant material level detection and purge device applied to the ash hopper of the electric furnace waste heat recovery system described in the utility model comprises:

[0028] The venturi tube 1 comprises an inlet section 11, a throat section 12 and an outlet section 13; the diameter of the inlet section 11 is larger than the diameter of the outlet section 13, and the diameter of the throat section 12 is smaller than the diameter of the outlet section 13; a control valve F is provided in the outlet section 13 pipeline;

[0029] A tee pipe 2, a port 21 in the middle of which is connected to the throat section 12 of the venturi pipe 1;

[0030] The purge pipe 3 has its inlet end connected to the outlet section 13 of the venturi tube 1; a plurality of purge ports 31 are arranged along the pipe body of the purge pipe 3;

[0031] The detection tube 4 has one end connected to the front port 22 of the three-way tube 2, and the other end of the detection tube 4 extending into the ash hopper 100 is provided with a bell mouth 41 opening downward;

[0032] The control assembly 5 comprises a piston 51 and an upper push rod 52 , and a spring 53 . The piston 51 and the upper push rod are arranged in the rear port 23 of the three-way pipe 2 . The spring 53 is sleeved on the push rod 52 , and its front end abuts against the piston 51 .

[0033] Preferably, the purge pipe 3 is provided with three sections, is U-shaped, and is arranged around three inner walls of the ash hopper.

[0034] Preferably, at least three purge ports are provided on the purge pipe 3 corresponding to each inner wall of the ash hopper.

[0035] Preferably, the purge port 31 of the purge pipe 3 is provided with a purge pipe with a Laval tube, a purge pipe with a bell mouth, or a round tube.

[0036] Through changes in on-site usage, the use of a purge joint with a Laval tube can make the purge area larger and the purge force more uniform, thus avoiding the possibility of inner wall breakdown due to long-term purge of the inner wall of the ash hopper.

[0037] Preferably, the control valve F is a ball valve.

[0038] The working process of this utility model is as follows:

[0039] When the compressed air reaches the inside of the ash hopper 100 from the purge pipe 3 of the outlet section 13 of the Venturi tube 1, the inner wall of the ash hopper 100 is purged through the purge port 31 on the purge pipe 3 to achieve dust removal; at the same time, since the pipeline cross-section changes from the large-diameter inlet section 11 to the small-diameter throat section 12, the pressure in the throat section 12 pipeline decreases, and the pressure in the three-way pipe 2 connected to the throat section 12 also decreases (Venturi tube effect). When the accumulated dust in the ash hopper 100 accumulates to the position covering the bell mouth 41 of the detection tube 4, a low-pressure effect is generated in the three-way pipe 2, and the piston and push rod of the control component 5 at the other end of the three-way pipe 2 are stretched to achieve the purpose of mechanical displacement; a spring is installed on the piston and the push rod. When the pressure returns to normal, the push rod is reset to the starting position by the spring. After the mechanical displacement is connected to the limit, the alarm and interlocking functions of the ash conveying system can be realized by connecting to the PLC control unit. The shape of the bell mouth 41 can effectively prevent the pipe opening from being blocked by the accumulated dust above, and can ensure that the accumulated dust at the bottom of the ash hopper normally covers the bell mouth 41 .

[0040] The function of the control valve F on the three-way pipe 2 is to use the closed state to allow the compressed air to blow and clean the Venturi pipeline to prevent it from being blocked by dust accumulation after long-term operation; the valve can also be remotely controlled or automatically adjusted by connecting to a PLC control unit.

Claims

1. A high temperature resistant material level detection and purge device applied to the ash hopper of the waste heat recovery system of an electric furnace, characterized in that: include: The venturi tube comprises an inlet section, a throat section and an outlet section; the diameter of the inlet section is larger than the diameter of the outlet section, and the diameter of the throat section is smaller than the diameter of the outlet section; The outlet section pipeline is equipped with a control valve; A tee pipe, the port in the middle of which is connected to the throat section of the venturi pipe; A purge pipe, the inlet end of which is connected to the outlet port of the venturi tube; a plurality of purge ports are arranged along the pipe body of the purge pipe; The detection tube has one end connected to the front port of the tee pipe, and the other end of the detection tube extending into the ash hopper is provided with a bell mouth opening downward; A control assembly, including a piston and its upper push rod, and a spring; The piston and its upper push rod are arranged in the rear port of the three-way pipe; the spring is sleeved on the push rod, and its front end abuts against the piston.

2. The high temperature resistant material level detection and purging device applied to the ash hopper of the electric furnace waste heat recovery system according to claim 1 is characterized in that: The purge pipe is provided with three sections, is U-shaped, and is arranged around three inner walls of the ash hopper.

3. The high temperature resistant material level detection and purge device applied to the ash hopper of the electric furnace waste heat recovery system according to claim 1 or 2, characterized in that: At least three purge ports are arranged on the purge pipe corresponding to each inner wall of the ash hopper.

4. The high temperature resistant material level detection and purge device applied to the ash hopper of the electric furnace waste heat recovery system according to claim 1 or 2, characterized in that: The purge opening of the purge pipe is provided with a Laval tube, a purging pipe with a bell mouth or a round pipe.

5. The high temperature resistant material level detection and purging device applied to the ash hopper of the electric furnace waste heat recovery system as claimed in claim 3 is characterized in that: The purge opening of the purge pipe is provided with a Laval tube, a purging pipe with a bell mouth or a round pipe.

6. The high temperature resistant material level detection and purging device applied to the ash hopper of the electric furnace waste heat recovery system according to claim 1, characterized in that: The control valve is a ball valve.

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