Conveying equipment applied to ash removal of waste heat boiler
By designing steel ball reception, transportation, spreading and refueling devices for waste heat boilers of mineral heat furnaces, the continuity, stability and economical problems of the ash cleaning equipment are solved, efficient ash removal and waste heat recovery are achieved, and equipment wear and operation costs are reduced.
Patent Information
- Application Number
- CN202422150693.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing mineral hot furnace waste heat boiler ash cleaning equipment has shortcomings in terms of continuity, stability and economicality, resulting in a decrease in heat exchange efficiency and an increase in economic costs.
Design a conveying equipment for cleaning ash for waste heat boilers, including steel ball reception, transportation, spreading and refueling devices, realize the recycling and automated operation of steel balls, and ensure the continuity and stability of the cleaning process.
Effectively remove and collect ash on the boiler's heated surface, improve waste heat recovery efficiency, reduce equipment wear and energy consumption, and reduce labor intensity and labor costs.
Smart Images
Figure CN223267921U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of conveying for cleaning waste heat boilers, in particular to conveying equipment used for cleaning waste heat boilers. Background Art
[0002] Submerged arc furnace, also known as "submerged arc furnace", is mainly used for the production of ecological metal silicon, ferrosilicon alloy, manganese iron alloy, manganese silicon alloy, nickel titanium alloy, calcium carbide and other products. The dust content of the flue gas of the waste heat boiler of this submerged arc furnace is 5-20g / Nm 3 Most of the dust in the flue gas has a diameter of 0.1-0.5um and is composed of spherical particles and pellets of these particles. The characteristics of dust are low density, fine and light, good cementation performance, strong electrostatic adsorption and adsorption capacity between particles, and not easy to settle. The ash contains SiO2, MgO, CaO, Fe2O3 and other nano-particles. These particles show different adhesion in different temperature zones and humidity, and are very easy to adhere to the heat exchange tubes in the boiler, resulting in a sharp decrease in the heat exchange efficiency of the heat exchange surface of the heat exchange tubes, seriously affecting the recovery and utilization of the flue gas waste heat of this type of submerged arc furnace, as well as the recovery of smoke dust with high economic value.
[0003] At present, the cleaning devices for the heating surface of the waste heat boiler of the submerged arc furnace mainly include mechanical brush cleaning, mechanical vibration cleaning, steam (air) soot blowing and sonic cleaning, but each of the above cleaning methods has certain limitations:
[0004] Mechanical brush cleaning, because its brushes move back and forth between the heat exchange tubes to clean dust, is prone to wear and tear, has a short service life, and requires frequent replacement. This is not only costly but also seriously affects the efficiency of the entire waste heat boiler. Mechanical vibration cleaning has the advantage of uniform distribution of mechanical wave generation and transmission time and space, and is extremely effective for removing large particles and loose dust, making it widely used. However, it is less effective for nano-sized particles, which have good bonding properties, strong electrostatic adsorption and adsorption between particles, and are not easy to settle. Steam (air) soot blowing has the disadvantage of not being able to clean continuously. The dust removal effect varies greatly from different parts of the heating surface, resulting in many blind spots. It also requires a large amount of steam or compressed air, which consumes a lot of energy and is very uneconomical. Sonic wave cleaning has the disadvantage of not being able to clean continuously. The dust removal effect varies greatly from different parts of the heating surface, resulting in many blind spots. Moreover, due to the high negative pressure in the boiler, the soot input brings in a large amount of cold air, which seriously affects the thermal efficiency of the boiler.
[0005] Nowadays, the use of steel ball cleaning can more comprehensively overcome the shortcomings of the above-mentioned cleaning methods and is gradually gaining recognition from most users in the industry. The so-called steel ball cleaning works by sprinkling steel balls with a diameter of 5-10mm into the vertical flue of the waste heat boiler from the top. The steel balls are used to move irregularly from top to bottom inside the boiler, colliding with the pipes to clean the ash, knocking off the accumulated ash on the surface of the heated pipes in the boiler, thereby achieving the purpose of cleaning. However, when transporting the ash from the waste heat boiler, the equipment has shortcomings in terms of continuity, stability, and economy. To solve this problem, we have proposed a conveying equipment for waste heat boiler ash cleaning. Utility Model Content
[0006] The purpose of the utility model is to solve the shortcomings of the equipment in the prior art in terms of insufficient continuity, stability and economy, and to propose a conveying equipment for cleaning waste heat boilers.
[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0008] A conveying equipment for cleaning waste heat boilers is designed, including a mounting frame, wherein the mounting frame is mounted on the waste heat boiler, a steel ball receiving device is provided below the ash hopper of the waste heat boiler, a steel ball transport device is provided on the outside of the mounting frame, the steel ball transport device is arranged in a ring shape, a steel ball spreading and distribution device is installed at the upper position of the waste heat boiler, a hopper roller guide device is installed on the mounting frame, chain guide devices are installed on both sides of the mounting frame, a vertical section protection device is installed inside the mounting frame, the vertical section protection device covers the vertical lifting sections on both sides of the steel ball transport device, and a hopper roller guide device is installed on the mounting frame.
[0009] Preferably, the steel ball receiving device includes a conical discharge valve, a steel ball temporary storage bucket is fixedly connected to the conical discharge valve, the conical discharge valve is fixedly connected to the lower bracket of the waste heat boiler, and a manual plug-in valve is provided on the steel ball temporary storage bucket.
[0010] Preferably, the steel ball transport device includes an upper bracket, which is installed on the mounting frame, an upper guide rail is installed on the upper part of the upper bracket, a lower bracket is installed on the mounting frame, a lower guide rail is installed on the upper part of the lower bracket, a first redirecting wheel device is installed on the upper bracket, and second redirecting wheel devices are installed at both ends of the lower bracket. A transmission wheel device is installed on the upper bracket, and the transmission wheel device, the first redirecting wheel device, and the second redirecting wheel device are connected in series to form a ring-shaped lifting chain assembly, one end of the transmission wheel device is installed with a transmission device, and the other end of the transmission wheel device is installed with a check valve device, and a chain tensioning device is provided on one side of the second redirecting wheel device.
[0011] Preferably, the hopper roller guide device includes a lower hopper roller guide device, the upper hopper roller guide device is installed on the upper bracket, the lower hopper roller guide device is installed on the lower bracket, and the upper hopper roller guide device and the lower hopper roller guide device are both provided with guide rollers.
[0012] Preferably, the steel ball sowing and distribution device includes a steel ball hopper, which is installed on the waste heat boiler, and a hopper unloading trigger is installed on the steel ball hopper. A steel grille is installed in the steel ball hopper, and a dust collecting hood is installed on one side of the steel ball hopper. A dust removal port is provided on the dust collecting hood. An electric weight flap valve is installed at the lower part of the steel ball hopper, and a six-nozzle distributor is installed at the lower part of the electric weight flap valve. Six spraying devices are installed in the waste heat boiler, and an in-furnace steel ball buffer is provided between the spraying device and the six-nozzle distributor. The spraying device, the six-nozzle distributor and the in-furnace steel ball buffer are connected by a steel pipe.
[0013] Preferably, the steel ball return device includes a collecting hopper, the collecting hopper is installed on the lower bracket, a lifting screw conveyor is provided on the collecting hopper, and the discharge port is connected to the steel ball temporary storage hopper.
[0014] The utility model proposes a conveying equipment for cleaning the waste heat boiler, which has the beneficial effects of effectively removing and collecting the accumulated dust and sticky dust on the heating surface of the waste heat boiler of the blast furnace, and effectively ensuring the waste heat recovery efficiency of the waste heat boiler. The steel ball conveying device is mainly used for collecting the steel balls discharged by the steel ball receiving device, and conveying them to the top of the boiler, and realizing circular transportation. The upper hopper roller guide device and the lower hopper roller guide device are mainly used for making the hopper in a horizontal and non-shaking state when receiving materials at the bottom and pouring materials at the top, so as to ensure that the upper and lower frames of the hopper are in a horizontal state when operating, and can effectively prevent the steel balls from being scattered due to the tilt of the hopper when feeding. By arranging a steel ball return device at the bottom lower frame, the steel balls scattered during feeding can be collected, and the collected steel balls are conveyed back to the steel ball temporary storage bucket in the steel ball receiving device through the screw conveyor, so as to ensure the balance of the number of steel balls in the entire steel ball cleaning system and ensure the cleaning efficiency. It can replace manual collection of returned materials, reduce the labor intensity and labor costs of users' workers, and thus ensure the continuity, stability and economy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural diagram of a conveying equipment for waste heat boiler ash cleaning proposed by the utility model;
[0016] Figure 2 This is a side view of a conveying equipment for cleaning waste heat boilers proposed in the utility model;
[0017] Figure 3 This is a structural diagram of a steel ball receiving device for conveying equipment used for waste heat boiler ash cleaning proposed by the utility model;
[0018] Figure 4 This is a front view of a steel ball transport device for conveying equipment used for waste heat boiler ash cleaning proposed by the utility model;
[0019] Figure 5 This is a surveying diagram of a steel ball transport device used in conveying equipment for cleaning waste heat boilers proposed in the utility model;
[0020] Figure 6 This is a structural diagram of a hopper roller guide device for conveying equipment used for waste heat boiler ash cleaning proposed in the utility model;
[0021] Figure 7 This is a front view of a steel ball spreading and distributing device for conveying equipment used for waste heat boiler ash cleaning proposed by the utility model;
[0022] Figure 8 This is a side view of a steel ball spreading and distribution device for conveying equipment used for waste heat boiler ash cleaning proposed in the utility model;
[0023] Figure 9 This is a structural diagram of a steel ball return device for conveying equipment used for waste heat boiler ash cleaning, proposed by the utility model.
[0024] In the figure: mounting frame 1; waste heat boiler 2; steel ball receiving device 3; manual gate valve 301; steel ball temporary storage bucket 302; conical discharge valve 303; steel ball transport device 4; transmission device 401; transmission wheel device 402; upper bracket 403; upper guide rail 404; first redirecting wheel device 405; lifting chain assembly 406; second redirecting wheel device 407; lower bracket 408; lower guide rail 409; chain tensioning device 410; backstop device 411; electrical control system 5; chain guide device 6; vertical section protection device 7; steel Bead return device 8; collecting hopper 81; lifting screw conveyor 82; discharge port 83; hopper roller guide device 9; lower hopper roller guide device 901; upper hopper roller guide device 902; guide roller 903: steel ball sowing and distribution device 10; steel ball receiving hopper 1001; steel grid 1002, hopper unloading trigger 1003, electric heavy hammer flap valve 1004, six-nozzle distributor 1005, steel pipe 1006, in-furnace steel ball buffer 1007, spraying device 1008, dust collecting hood 1009, dust removal port 1010. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0026] Reference Figure 1-9 A conveying equipment for cleaning ash from a waste heat boiler comprises a mounting frame 1 which is mounted on the waste heat boiler 2. An electrical control system 5 is provided on one side of the waste heat boiler 2. A steel ball receiving device 3 is provided below the ash hopper of the waste heat boiler 2. A steel ball transport device 4 is provided on the outside of the mounting frame 1. The steel ball transport device 4 is arranged in a ring shape. A steel ball spreading and distribution device 10 is installed on the upper part of the waste heat boiler 2. A hopper roller guide device 9 is installed on the mounting frame 1. Chain guide devices 6 are installed on both sides of the mounting frame 1. A vertical section protection device 7 is installed inside the mounting frame 1. The vertical section protection device 7 covers the vertical lifting sections on both sides of the steel ball transport device 4, mainly performing personnel safety protection and rain and snow protection on the vertical lifting sections on both sides of the steel ball transport device 4. A hopper roller guide device 9 is installed on the mounting frame 1.
[0027] The steel ball receiving device 3 includes a conical discharge valve 303, to which a steel ball temporary storage bucket 302 is fixedly connected. The conical discharge valve 303 is fixedly connected to the lower bracket of the waste heat boiler 2, and a manual plug-in valve 301 is provided on the steel ball temporary storage bucket 302 to receive the steel balls.
[0028] The steel ball transport device 4 includes an upper bracket 403, which is mounted on the mounting frame 1. An upper guide rail 404 is mounted on the upper portion of the upper bracket 403. A lower bracket 408 is mounted on the mounting frame 1. A lower guide rail 409 is mounted on the upper portion of the lower bracket 408. A first redirecting wheel device 405 is mounted on the upper bracket 403. Second redirecting wheel devices 407 are mounted at both ends of the lower bracket 408. A transmission wheel device 402 is mounted on the upper bracket 403. The transmission wheel device 402, the first redirecting wheel device 405, and the second The redirecting wheel device 407 is connected in series to form a ring-shaped lifting chain assembly 406. A transmission device 401 is installed at one end of the transmission wheel device 402, and a check device 411 is installed at the other end of the transmission wheel device 402. The check device 411 is mainly used to prevent the steel ball transport device from reversing when it stops running. A chain tensioning device 410 is provided on one side of the second redirecting wheel device 407. The steel ball transport device 4 is mainly used to collect the steel balls discharged from the steel ball receiving device 3, and transport them to the top of the boiler to realize circular transportation.
[0029] The hopper roller guide device 9 includes a lower hopper roller guide device 901, an upper hopper roller guide device 902 is installed on the upper bracket 403, and the lower hopper roller guide device 901 is installed on the lower bracket 408. Both the upper hopper roller guide device 902 and the lower hopper roller guide device 901 are provided with guide rollers 903. The upper hopper roller guide device 902 and the lower hopper roller guide device 901 are mainly used to make the hopper in a horizontal and non-shaking state when receiving materials at the bottom and pouring materials at the top, to ensure that the hopper is in a horizontal state when the upper and lower frames are running, which can effectively avoid the steel balls from falling due to the tilt of the hopper when feeding. The upper hopper roller guide device 902 and the lower hopper roller guide device 901 are used to guide the hopper, and the steel balls are stored and transported by moving the hopper.
[0030] The steel ball spreading and distribution device 10 includes a steel ball receiving hopper 1001, which is installed on the waste heat boiler 2. A hopper unloading trigger 1003 is installed on the steel ball receiving hopper 1001, a steel grid 1002 is installed in the steel ball receiving hopper 1001, a dust collecting cover 1009 is installed on one side of the steel ball receiving hopper 1001, and a dust removal port 1010 is provided on the dust collecting cover 1009. An electric heavy hammer flap valve 1004 is installed at the bottom of the steel ball receiving hopper 1001, and a six-nozzle distributor 1005 is installed at the bottom of the electric heavy hammer flap valve 1004. The six-nozzle distributor is in the shape of a cylinder 1005, with an elliptical sphere at the bottom and a circular sphere on the upper edge. There are 6 circular discharge ports of equal diameter evenly arranged on the center line of the column. Six spraying devices 1008 are installed in the waste heat boiler 2. An in-furnace steel ball buffer 1007 is arranged between the spraying device 1008 and the six-nozzle distributor 1005. The spraying device 1008, the six-nozzle distributor 1005 and the in-furnace steel ball buffer 1007 are connected by a steel pipe 1006. The electric heavy hammer flap valve 1004 is mainly used to regularly discharge the steel balls in the steel ball temporary storage bucket 302 into the six-nozzle distributor 1005 in a regular and quantitative manner, and ensure that during the discharge process, air is isolated from entering the waste heat boiler 2 along the six-nozzle distributor 1005 to avoid malfunction of the waste heat boiler 2 due to the entry of air.
[0031] The steel ball return device 8 includes a collection hopper 81 mounted on the lower bracket 408. The collection hopper 81 is equipped with a lifting screw conveyor 82. The discharge port 83 is connected to the steel ball temporary storage hopper 302. The steel ball return device 8 is primarily used to collect steel balls that spill out of the hopper when the steel ball receiving device 3 feeds the hopper, and then return the collected steel balls to the steel ball temporary storage hopper 302 in the steel ball receiving device 3. This ensures a balanced number of steel balls throughout the steel ball cleaning system, ensuring cleaning efficiency. The steel balls are recyclable, can be operated mechanically and automatically, has complete safety protection devices, and achieves excellent dust removal. It can effectively remove and collect accumulated dust and sticky dust on the heating surface of the waste heat boiler of the submerged arc furnace, effectively ensuring the waste heat recovery efficiency of the waste heat boiler.
[0032] During operation, steel balls are transported by the steel ball transport device 4 to the steel ball receiving hopper 1001 at the top of the boiler. After a certain number of steel balls are accumulated, the electric hammer flap valve 1004 opens the valve plate, and the steel balls are evenly distributed through the six-nozzle distributor 1005. After being evenly spread through the steel ball spraying device 1008, the steel balls enter the boiler. Inside the boiler, the steel balls move irregularly from top to bottom, hitting the pipes to clean the ash, and then fall into the ash hopper at the bottom of the boiler outlet flue. After the steel balls are separated from the ash powder, they are discharged from the boiler through the chute connected to the bottom ash hopper. The chute is equipped with an air leakage prevention device. The steel balls are collected by the steel ball receiving device 3 and discharged into the empty hopper through the conical discharge valve. The steel ball transport device 4 circulates, lifting the steel balls again to the steel ball receiving hopper 1001 at the top. According to the time set in advance by the electrical control system 5, the electric hammer flap valve 1004 is opened again to enter the boiler for cleaning. This repetitive cleaning operation can achieve the purpose of continuous boiler cleaning.
[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A conveying device for cleaning waste heat boiler, comprising a mounting frame (1), characterized in that: The mounting frame (1) is mounted on the waste heat boiler (2), a steel ball receiving device (3) is provided below the ash hopper of the waste heat boiler (2), a steel ball transport device (4) is provided on the outside of the mounting frame (1), the steel ball transport device (4) is arranged in a ring shape, a steel ball spreading and distributing device (10) is installed on the upper part of the waste heat boiler (2), a hopper roller guide device (9) is installed on the mounting frame (1), chain guide devices (6) are installed on both sides of the mounting frame (1), a vertical section protection device (7) is installed inside the mounting frame (1), the vertical section protection device (7) covers the vertical lifting sections on both sides of the steel ball transport device (4), and a hopper roller guide device (9) is installed on the mounting frame (1).
2. The conveying equipment for cleaning waste heat boiler according to claim 1 is characterized in that: The steel ball receiving device (3) comprises a conical discharge valve (303), a steel ball temporary storage hopper (302) is fixedly connected to the conical discharge valve (303), the conical discharge valve (303) is fixedly connected to the lower bracket of the waste heat boiler (2), and a manual gate valve (301) is provided on the steel ball temporary storage hopper (302).
3. The conveying equipment for cleaning waste heat boiler according to claim 1 is characterized in that: The steel ball transport device (4) comprises an upper bracket (403), the upper bracket (403) is mounted on the mounting frame (1), an upper guide rail (404) is mounted on the upper portion of the upper bracket (403), a lower bracket (408) is mounted on the mounting frame (1), a lower guide rail (409) is mounted on the upper portion of the lower bracket (408), a first redirecting wheel device (405) is mounted on the upper bracket (403), and second redirecting wheel devices (407) are mounted at both ends of the lower bracket (408). ), a transmission wheel device (402) is installed on the upper bracket (403), the transmission wheel device (402), the first redirecting wheel device (405), and the second redirecting wheel device (407) are connected in series to form a ring-shaped lifting chain assembly (406), one end of the transmission wheel device (402) is installed with a transmission device (401), the other end of the transmission wheel device (402) is installed with a backstop device (411), and one side of the second redirecting wheel device (407) is provided with a chain tensioning device (410).
4. The conveying equipment for cleaning waste heat boiler according to claim 3 is characterized in that: The hopper roller guide device (9) comprises a lower hopper roller guide device (901), the upper hopper roller guide device (902) is mounted on the upper bracket (403), and the lower hopper roller guide device (901) is mounted on the lower bracket (408), and both the upper hopper roller guide device (902) and the lower hopper roller guide device (901) are provided with guide rollers (903).
5. The conveying equipment for cleaning waste heat boiler according to claim 4 is characterized in that: The steel ball spreading and distributing device (10) comprises a steel ball receiving hopper (1001), the steel ball receiving hopper (1001) is installed on the waste heat boiler (2), a hopper unloading trigger (1003) is installed on the steel ball receiving hopper (1001), a steel grid (1002) is installed in the steel ball receiving hopper (1001), a dust collecting cover (1009) is installed on one side of the steel ball receiving hopper (1001), a dust removal port (1010) is provided on the dust collecting cover (1009), and the steel ball receiving hopper (1001) is provided with a dust collecting cover (1010). 01) is installed at the lower part of an electric heavy hammer flap valve (1004), a six-nozzle distributor (1005) is installed at the lower part of the electric heavy hammer flap valve (1004), six spraying devices (1008) are installed in the waste heat boiler (2), an in-furnace steel ball buffer (1007) is provided between the spraying device (1008) and the six-nozzle distributor (1005), and the spraying device (1008), the six-nozzle distributor (1005) and the in-furnace steel ball buffer (1007) are connected via a steel pipe (1006).
6. The conveying equipment for cleaning waste heat boiler according to claim 5 is characterized in that: The steel ball return device (8) includes a collecting hopper (81), the collecting hopper (81) is installed on the lower bracket (408), a lifting screw conveyor (82) is provided on the collecting hopper (81), and the discharge port (83) is connected to the steel ball temporary storage hopper (302).