Capacity expansion layout structure of integrated screening and crushing machine in the crushing building
By adding screening machines and ship-shaped hoppers in the crushing building and optimizing the equipment layout, the problem of inefficiency of the existing coal transportation system after energy expansion is solved, higher production capacity and lower costs are achieved, and the benefits of industrial and mining enterprises are significantly improved.
Patent Information
- Application Number
- CN202420959365.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The coal transportation system of the existing circulating fluidized bed boiler cannot meet the higher capacity needs after energy expansion, resulting in old equipment and low efficiency, and the time and cost of building a new coal transportation system are too high.
By adding screening machines and ship-shaped hoppers in the crushing building, expanding the screening area, and installing new screening and crushing equipment on the crusher, optimizing the equipment layout and structure, realizing energy expansion and transformation.
The original coal consumption of 3,000 tons per day was successfully expanded to 6,000 tons, which increased the production capacity of the coal transportation system, shortened the coal transportation time, saved energy and construction cycle, and reduced the cost of equipment purchase and formal approval.
Smart Images
Figure CN222739337U_ABST
Abstract
Description
Technical Field
[0001] The utility model is a process layout for expanding the capacity and increasing the efficiency based on the existing crushing building, which involves the fields of coal, electricity, mining, chemical industry and coking, and is particularly suitable for the coal conveying, screening and crushing building of circulating fluidized bed boilers in thermal power plants. Background Art
[0002] Urban heating, thermal power generation, and self-contained power plants generally use circulating fluidized bed boilers, which burn coal particles with a certain proportion curve. In the coal yard, coal particles that meet the boiler combustion particle size account for about 50-75%. Screening out this part of the qualified particle size without crushing is the core process for achieving capacity expansion.
[0003] The capacity expansion of heating system, the capacity expansion of industrial and mining enterprises, and the output and particle size of the screening and crushing equipment of the coal transportation system that provides power are the top priorities in this capacity expansion task. If the normal process system is expanded by 1.5-5 times, a new coal transportation system needs to be built, and the procedures, designs, civil engineering, equipment, etc. involved range from several million to tens of millions, and the time period ranges from half a year to three to five years. Therefore, the public application of this layout process will bring direct benefits to industrial and mining enterprises.
[0004] The early crushing system used four-tooth roller crusher, vibrating feeder plus tooth roller crusher, reversible hammer crusher, all-in and all-out method without any screening process. The selection of process and equipment determines the system output and output particle size. Due to production task requirements, the original coal transportation system equipment structure and process cannot meet the working conditions after capacity expansion, so the backward process equipment will be eliminated and dismantled in this capacity expansion. Summary of the invention
[0005] The utility model aims to solve the deficiencies of the existing above-mentioned technology and provide a capacity expansion arrangement structure of a screening and crushing integrated machine in a crushing building.
[0006] The capacity expansion layout structure of the integrated screening and crushing machine in the crushing building includes an incoming conveyor belt, an integrated screening and crushing machine, an incoming coal dropping pipe, a load-bearing beam, a coal plow, the original crusher foundation hole, the new crusher foundation hole, a screening dropping pipe, a discharging conveyor belt, a screening machine foundation expansion hole, a triangular plate is set on the load-bearing beam, a screening and crushing machine foundation base, and a boat-shaped hopper; the screening machine, the crusher, the crushing dropping pipe, and the crushing dropping pipe are arranged above the discharging conveyor belt. The length, width, height and civil engineering structure of the crushing layer space structure are increased to increase the screening equipment, the boat-shaped hopper and the crusher output model to increase the capacity expansion layout.
[0007] When the center line of the incoming conveyor belt is consistent with the center line of the crusher; the height of the crushing layer is 5-10 meters, the screening machine and the boat-shaped hopper are added to expand the screening area of the screening machine, and the crusher does not move.
[0008] When the center line of the incoming belt conveyor is inconsistent with the center line of the crusher, a coal plow is set on the incoming belt conveyor, and the upper and lower coal drop pipes corresponding to the new screening machine are installed, and the crusher remains unchanged.
[0009] The height of the crushing layer is 3-5 meters. Add a screening machine, move the crusher forward 1-10 meters as a whole and place it on the load-bearing beam, expand the screening machine area, and install the corresponding upper and lower coal pipes of the screening machine and crusher.
[0010] The crushing layer is 3-5 meters high. A coal plow is installed, a screening machine is added, the crusher is moved forward 1-10 meters as a whole and placed on the load-bearing beam, the screening machine area is expanded, and corresponding upper and lower coal pipes are installed for the screening machine and crusher.
[0011] Corresponding to the screening machine and crusher, the upper and lower coal feeding and discharging pipes on the floor are enlarged by 1 to 5 holes.
[0012] New screening and crushing equipment with greater output has been added.
[0013] When the coal drop pipe after screening and crushing is connected, it corresponds to 1-5 screening machine foundation expansion holes and the new crusher foundation hole to the discharge belt conveyor.
[0014] A triangular plate is set on the load-bearing beam inside the screening and crushing machine. The angle of the triangular plate is greater than 60 degrees to prevent material accumulation.
[0015] The inlet and outlet coal drop pipe angles are greater than 60 degrees.
[0016] The original design process consumed 3,000 tons of coal per day, with a coal quality of 4,200 kcal, a crusher output of 200t / h, a coal particle size of 0-10mm, and a coal transportation time of 15 hours. After the subsequent working conditions expand production capacity, the coal transportation system needs to consume 6,000 tons of coal per day, the coal quality is reduced to 2,800-3,500 kcal, the integrated screening and crushing machine output needs to reach 500t / h, and the coal particle size of 0-10mm. Therefore, it is necessary to reasonably arrange the screening and crushing equipment based on the existing crusher and take advantage of the length, width and height of the crushing layer to achieve capacity expansion and transformation.
[0017] This layout process uses the existing crushing floor's width, length, width and height space and civil engineering structure to cleverly move and dismantle the original equipment with low output, increase screening equipment to increase the screening area, set up coal plows and increase the output of the crusher to achieve capacity expansion from the original 3,000 tons per day to 6,000 tons of coal consumption. The integrated screening and crushing machine is designed to have an output of 500t / h, and the output particle size is 0-10mm; the output of the screening machine is 500t / h, and the screening efficiency is 95%; the crusher is designed to have an output of 250t / h, and 60% of the incoming coal has a qualified particle size; 285t / h of qualified particles are screened out by the screening machine, and the amount entering the crusher is only 215t / h. The crushing chamber of the crusher adopts a fully sealed structure to ensure that the qualified rate of the particle size after crushing is less than 0-10mm, accounting for more than 98%.
[0018] This capacity expansion layout process has been successfully put into operation in the coal transportation systems of power plants of domestic central state-owned enterprises such as Yangmei Shouyang Chemical, Shanxi Taiyuan Heating, Shanxi Senze Coal and Aluminum, Shanxi Taihua Group, and Sichuan Lutianhua; the commissioning of this technology has created and saved huge economic benefits for users.
[0019] The spatial dimensions of the crushing building site are generally divided into two structures: one is that the center line of the belt conveyor is consistent with the center line of the crusher below, and the other is that the center line of the belt conveyor is inconsistent with the center line of the crusher. There is a certain distance between them. The output of the screening machine can be expanded by adding a pear coal filter.
[0020] As a preferred expansion arrangement process A, when the center line of the incoming conveyor belt is consistent with the center line of the crusher, and the layer height is between 5-10 meters, a boat-shaped hopper is added to expand the screening area of the screening machine, and the crusher does not move.
[0021] As a preferred capacity expansion arrangement process B, when the center line of the incoming conveyor belt is inconsistent with the center line of the crusher, a coal plow is set on the incoming conveyor belt, and the upper and lower coal drop pipes corresponding to the new screening machine are installed, and the crusher remains unchanged.
[0022] As a preferred expansion arrangement process C, the crushing layer is 3-5 meters high, the crusher is moved forward 1-10 meters as a whole and placed on the load-bearing beam, the screening machine area is expanded, and the screening machine and the crusher are installed with corresponding upper and lower coal pipes.
[0023] The capacity expansion layout process requires the re-manufacturing of load-bearing beams. The load-bearing beams and openings can be re-arranged in the crushing building according to the working conditions. The openings are divided into new crusher foundation holes and screening machine foundation expansion holes.
[0024] As a preferred expansion arrangement process D, the crushing layer is 3-5 meters high, a coal plow is installed, a screening machine is added, the crusher is moved forward 1-10 meters as a whole and placed on the load-bearing beam, the screening machine area is expanded, and the screening machine and the corresponding upper and lower coal pipes are installed.
[0025] As a preferred expansion arrangement process A / B / C / D, 1 to 5 holes are enlarged in the floor of the upper and lower coal feeding and discharging pipes of the screening machine and the crusher.
[0026] As an optimal expansion arrangement process, new screening and crushing equipment with greater output is added; the coal dropping pipe of the incoming conveyor is connected at the top, and the coal dropping pipe after screening and crushing is connected to the discharging conveyor at the bottom.
[0027] As a preferred arrangement process for the machine capacity expansion, when the coal drop pipe after screening and crushing is connected below, 1-3 corresponding floor holes are expanded to the discharge belt conveyor.
[0028] As a preferred embodiment of the capacity expansion arrangement process, a triangular plate is arranged on the load-bearing beam in the screening crusher to prevent material accumulation.
[0029] As a preferred embodiment, the boat-shaped hopper is in the middle of the screening and crushing equipment. Its purpose is to expand the screening area and improve the screening efficiency. The side angle of the boat-shaped hopper is not less than 60 degrees, and the size is determined according to the output and on-site space.
[0030] As a preferred configuration, the basic base of the screening and crushing machine is as follows: if there is a load-bearing beam in the basic frame that interferes with coal blocking, a triangular plate is set on the load-bearing beam and the basic base of the screening and crushing machine is matched. If there is no risk of coal blocking in the basic frame, no basic base is set.
[0031] The screening distributor is a highly efficient screening device.
[0032] As a preferred expansion layout process, the angle of the coal inlet and outlet pipes is greater than 60 degrees.
[0033] The coal plow has two structures, single plow and double plow. The process of screening and crushing can be realized by raising and lowering the coal plow.
[0034] The process described has a coal plow arrangement, in which there are two incoming coal drop pipes. Its main function is: the coal plow plows more than 95% of the coal to the screen distributor. The coal plow cannot plow 100% cleanly, so a small amount of 2-5% of coal powder enters the crusher through the original coal drop pipe, which protects the environment from coal spreading pollution and can also lift the coal plow to the original crushing system.
[0035] As a preferred embodiment, the screening and crushing equipment is preferably placed on the load-bearing beam. According to the bearing capacity calculation of the load-bearing beam, the load-bearing beam can be remade due to the need for capacity expansion.
[0036] The screening machine is not limited to a roller screen, a toothed roller screen, a vibrating screen, a sinusoidal screen, a cross screen, a drum screen, a banana screen, a step screen, a comb-type swing screen, a screen distributor, and the like.
[0037] The screen surface of the screening machine can be installed horizontally or inclined at 3-60 degrees.
[0038] The crusher is not limited to a hammer crusher, an impact crusher, a toothed roller crusher, a screening crusher, a non-blocking crusher, and an anti-escape hammer crusher.
[0039] There are two types of center lines: one is the center line of the incoming conveyor belt, and the other is the center line of the crusher main rotor. There is also a situation where the center line of the incoming conveyor belt coincides with the center line of the crusher main rotor.
[0040] As a preferred embodiment, the screening and crushing integrated machine refers to a combination of an upper part of the equipment being a screening device, i.e., a screen distributor, and a lower part being a crushing device, i.e., an anti-escape hammer crusher.
[0041] As a preferred principle process diagram, the crushers of the original old crushing system are a toothed roller crusher and a reversible hammer crusher.
[0042] The electrical system of the integrated screening and crushing machine in the capacity expansion process is connected to the original central control system to realize remote on-site control.
[0043] The utility model has the following benefits:
[0044] Adding a screening machine: Adding a screening machine above the crusher to improve screening efficiency is the core of this capacity expansion process. There are 50-70% qualified particle sizes in the incoming materials. This part of qualified coal will be screened out and the amount entering the crusher can be enlarged. If the original crusher can output 200t / h, the coal output can be increased to 600-750t / h after adding a screening machine.
[0045] Boat-shaped hopper: If space permits, add a general-shaped hopper to expand the screening area and improve screening efficiency.
[0046] (2) Shortened coal transportation time: After on-site capacity expansion, the original coal transportation time is shortened, saving 3-8 hours of energy per day. A coal transportation line consumes 800kw to 4500kw of electricity per hour, and the cost of energy saving and consumption reduction is huge every day.
[0047] (3) It can save time and cost. The long construction period of the new coal transportation system can be shortened by 1-3 years. Through this technical solution, the capacity can be expanded and put into production within 1 month, which shortens the time for the new production port to be put into production and increases the market competitiveness of the enterprise.
[0048] (4) It can save construction costs: Building a crushed building costs at least several hundred thousand yuan and at most several million yuan. It can also save time in building a crushed building.
[0049] (5) It can save equipment purchase costs: after the construction of the crushing building, coal transportation equipment such as belt conveyors, dust collectors, coal drop pipes, etc. need to be installed.
[0050] (6) It can save the cost of various approval procedures: The construction of a coal transportation system requires approval procedures from relevant national departments, which requires a lot of manpower and material resources.
[0051] (7) It can further save other costs: the commissioning of new technologies (products) and the expansion of new systems will achieve huge benefits as the technology and time match each other. The installation of a new coal transportation system takes at least 8-10 months and at most 3-5 years. If the profit-making period is missed, the project will be full of regrets. BRIEF DESCRIPTION OF THE DRAWINGS
[0052] Figure 1 This is the layout diagram of the utility model in which the center line of the incoming material belt conveyor without capacity expansion is consistent with the center line of the crusher;
[0053] Figure 2 A capacity expansion scheme for adding a screening machine to the front-moving crusher is provided for the utility model;
[0054] Figure 3 A capacity expansion plan for adding screening, coal plowing, and forward crusher positions to the utility model;
[0055] Figure 4 This is the layout diagram of the new non-expanded type incoming belt conveyor with the center line inconsistent with the center line of the crusher;
[0056] Figure 5 A capacity expansion scheme for adding a screening machine to the utility model;
[0057] Figure 6 A capacity expansion scheme for adding a screening machine and a coal plow to the utility model;
[0058] Figure 7 This is a layout diagram of the utility model in which the center line of the incoming material belt conveyor without capacity expansion is consistent with the center line of the crusher and the space is higher;
[0059] Figure 8 The utility model adds a boat-shaped hopper to expand the efficiency of the screening machine;
[0060] Fig. 9 A capacity expansion scheme for increasing the output of the screening machine and the output of the crushing machine for the utility model;
[0061] Fig.10 A capacity expansion plan for adding screening machine, coal plow and forward crusher position to the utility model;
[0062] In the figure, incoming conveyor belt 1, integrated screening and crushing machine 2, incoming coal dropping pipe 3, load-bearing beam 4, center line 5, coal plow 6, original crusher foundation hole 7, new crusher foundation hole 8, screening dropping pipe 9, discharging conveyor belt 10, screening machine foundation expansion hole 11, triangular plate 12 is arranged on the load-bearing beam, integrated screening and crushing machine foundation base 13, boat-shaped hopper 14 screening machine 15, crusher 16, tooth roller crusher 17, reversible hammer crusher 18, crushing dropping pipe 19. DETAILED DESCRIPTION
[0063] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:
[0064] like Figures 1 to 10 As shown:
[0065] Capacity expansion layout process A: When the center line 5 of the incoming conveyor belt 1 is consistent with the center line 5 of the crusher, and the layer height is between 5-10 meters, the screening machine 15 and the boat-shaped hopper 14 are added to expand the screening area of the screening machine, and the crusher 16 remains unchanged to achieve 1.5-2.5 times capacity expansion.
[0066] Capacity expansion arrangement process B: When the center line 5 of the incoming conveyor belt 1 is inconsistent with the center line 5 of the crusher 16, a coal plow 6 is set on the incoming conveyor belt 1, and the upper and lower coal drop pipes corresponding to the new screening machine 15 are installed. The crusher 16 does not move, so as to achieve 2-3 times capacity expansion.
[0067] Capacity expansion layout process C: The crushing layer height is 3-5 meters, a screening machine 15 is added, the crusher 16 is moved forward 1-10 meters as a whole and placed on the load-bearing beam 4, the area of the screening machine 15 is expanded, and the screening machine and the crusher are installed with corresponding upper and lower coal pipes to achieve 2-4 times capacity expansion.
[0068] Capacity expansion layout process D: The crushing layer is 3-5 meters high, a coal plow 6 is installed, a screening machine 15 is added, the crusher 16 is moved forward 1-10 meters as a whole and placed on the load-bearing beam 4, the area of the screening machine 15 is expanded, and the screening machine 15 and the crusher 16 are installed with corresponding upper and lower coal pipes to achieve 2-5 times capacity expansion.
[0069] The working principle process of the utility model example is as follows:
[0070] Before the capacity expansion, the crushing layer had only one crusher 17 without screening equipment, and the output of crusher 18 was 200t / h; 3,000 tons of coal were consumed every day, the particle size of the coal entering the furnace was 10mm, and the coal transportation time was 15 hours.
[0071] After the expansion, the coal consumption is 6,000 tons per day. The integrated screening and crushing machine 2 is designed to have an output of 500t / h, a discharge particle size of 10mm, and a coal conveying time of 12 hours; the output of the screening machine 15 is 500t / h, and the screening efficiency is 95%; the crusher 16 is designed to have an output of 250t / h, and 60% of the incoming coal has a qualified particle size; 285t / h of the qualified particle size is screened out, and only 215t / h enters the crusher 16.
[0072] After the capacity expansion, the incoming coal from the conveyor belt 1 is 500t / h, the integrated screening and crushing machine 2 is designed to have an output of 500t / h, and the output particle size is 10mm. 495t / h of coal is plowed to the feeding port of the screening machine 15 through the coal plow 6, and the screening machine 15 screens out 282t / h of qualified coal, while the 5t / h of fine foam and 213t / h of lump coal that are not scraped off enter the crusher 16, that is, 218t / h, enter the crusher 16 and are crushed to qualified particle size.
[0073] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that other modifications or equivalent substitutions of the technical solutions of the present invention, without departing from the purpose and scope of the technical process of the present invention, should be included in the scope of the utility claims.
Claims
1. The capacity expansion layout structure of the integrated screening and crushing machine in the crushing building is characterized by: It comprises an incoming conveyor belt (1), a screening and crushing machine (2), an incoming coal drop pipe (3), a bearing beam (4), a coal plow (6), an original crusher foundation hole (7), a new crusher foundation hole (8), a screening drop pipe (9), a discharging conveyor belt (10), a screening machine foundation expansion hole (11), a triangular plate (12) is arranged on the bearing beam, a screening and crushing machine foundation base (13), and a boat-shaped hopper (14); a screening machine (15), a crusher (16), and a crushing drop pipe (19). The crushing drop pipe (19) is arranged above the discharging conveyor belt (10), and the length, width, height and civil engineering structure of the crushing layer space structure are increased to increase the screening equipment, the boat-shaped hopper (14) and the crusher output model to expand the capacity.
2. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: When the center line of the incoming conveyor belt (1) is consistent with the center line of the crusher (16); the crushing layer height is 5-10 meters, the screening machine (15) and the boat-shaped hopper (14) are added to expand the screening area of the screening machine (15), and the crusher (16) remains stationary.
3. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: When the center line of the incoming conveyor belt (1) is inconsistent with the center line of the crusher, a coal plow (6) is arranged on the incoming conveyor belt (1), and the upper and lower coal drop pipes corresponding to the new screening machine (15) are installed, and the crusher (16) remains stationary.
4. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: The height of the crushing layer is 3-5 meters. A screening machine (15) is added, and the crusher (16) is moved forward 1-10 meters as a whole and placed on the load-bearing beam (4). The area of the screening machine (15) is expanded, and the screening machine and the crusher are installed with corresponding upper and lower coal pipes.
5. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: The crushing layer has a height of 3-5 meters, a coal plow (6) is set, a screening machine (15) is added, the crusher (16) is moved forward 1-10 meters as a whole and placed on the load-bearing beam (4), the screening machine area is expanded, and the screening machine and the crusher are installed with corresponding upper and lower coal pipes.
6. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: Corresponding to the screening machine (15) and the crusher (16), the upper and lower coal feeding and discharging pipes are expanded with 1 to 5 holes.
7. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: New screening and crushing equipment with greater output has been added.
8. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: When the coal drop pipe after screening and crushing is connected, it corresponds to 1-5 screening machine foundation expansion holes (11) and new crusher foundation holes (8) to the discharge belt conveyor (10).
9. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1 is characterized in that: A triangular plate (12) is arranged on the load-bearing beam in the integrated screening and crushing machine (2), and the angle of the triangular plate is greater than 60 degrees to prevent material accumulation.
10. The capacity expansion arrangement structure of the integrated screening and crushing machine in the crushing building according to claim 1, characterized in that: The inlet and outlet coal drop pipe angles are greater than 60 degrees.