Calcium carbide furnace production batching system

Abstract

A calcium carbide furnace production batching system, comprising a lime kiln, a vertical drying kiln, a screening station and a batching station, the screening station comprising lime block material bins and lime powder material bins, carbon material block material bins and carbon material powder material bins, and lime vibrating screens and carbon material vibrating screens, the lime kiln being in communication with the feed inlet of the lime block material bin through a lime transfer belt conveyor and a lime vibrating screen; the vertical drying kiln being in communication with the feed inlet of the carbon material block material bin through a carbon material transfer belt conveyor and a carbon material vibrating screen; each batching station comprising two groups of material bins, i.e., four pairs of lime material bins and carbon material bins, the lime block material bin and the carbon material block material bin being in communication with a reversible walking belt conveyor in the first batching station; the reversible walking belt conveyor in the remaining batching stations being in communication with a multi-path chute above the previous batching station; a feeding belt conveyor being symmetrically arranged below the two groups of material bins; and a weighing hopper being arranged between the discharge port at the lower end of the lime material bin and the corresponding feeding belt conveyor.

Description

Technical Field

[0001] This utility model relates to a batching system, and more particularly to a batching system for calcium carbide furnace production. Background Technology

[0002] As is well known, calcium carbide production generally adopts the electrothermal method, using lime and dry carbon materials (as reducing agents) as raw materials. The raw materials are added into the calcium carbide furnace in a certain proportion, and electrical energy is input into the furnace to generate a high temperature of about 2000℃, which melts and reacts to produce calcium carbide. The calcium carbide product is then obtained by cooling.

[0003] The production process in a calcium carbide furnace has relatively high requirements for raw materials. Both lime and charcoal must be in lumpy form with a suitable particle size. Specifically, powder with a particle size below the required size cannot exceed 5%, and powder with a particle size above the required size cannot exceed 5%. Furthermore, the ratio of lime to charcoal must be appropriate; otherwise, the quality of the calcium carbide product will be reduced. Therefore, lime and charcoal need to be screened and batched before entering the calcium carbide furnace to remove raw materials that do not meet the particle size requirements, and the ratio of lime and charcoal with the required particle size must be appropriate.

[0004] Currently, with the adjustment of national industrial policies and the requirements for energy conservation and environmental protection, the construction of calcium carbide furnaces is developing towards large-scale and integrated projects. Therefore, new projects now are all calcium carbide projects with an annual output of 1.2 million tons or more, which requires at least 12 calcium carbide furnaces. Generally, two calcium carbide furnaces are placed in one workshop. According to the traditional batching system structure, one batching station and one screening station are set up for every two calcium carbide furnaces. Therefore, 12 calcium carbide furnaces would require 6 batching stations and 6 screening stations. Moreover, the calcium carbide furnace workshops need to be lined up in a row, occupying a large amount of land area and increasing construction costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a calcium carbide furnace production batching system with a small footprint and low construction cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A batching system for calcium carbide furnace production includes a lime kiln and a vertical drying kiln. A screening station and a batching station are provided between the lime kiln, the vertical drying kiln and the calcium carbide furnace. The special feature is that the screening station is one and includes two lime block silos and two lime powder silos, two charcoal block silos and two charcoal powder silos, as well as two lime vibrating screens and two charcoal vibrating screens. The discharge port of each lime kiln is connected to the inlet of the two lime vibrating screens through two lime transfer belt conveyors. The block material outlet of the two lime vibrating screens is connected to the inlet of the two lime block silos in a one-to-one correspondence. The powder material outlet of the two lime vibrating screens is connected to the inlet of the two lime powder silos in a one-to-one correspondence. The discharge port of the vertical drying kiln is connected to the inlet of two charcoal material vibrating screens via two charcoal material transfer belts. The block material outlet of the two charcoal material vibrating screens is connected to the inlet of the two charcoal material block material bins in a one-to-one correspondence. The powder material outlet of the two charcoal material vibrating screens is connected to the inlet of the two charcoal material powder material bins in a one-to-one correspondence. The batching stations are multiple, with each station corresponding to one of the four calcium carbide furnaces installed in the two main workshops. Each batching station includes two sets of silos arranged side by side, and each set of silos includes four pairs of lime silos and charcoal silos arranged alternately. Reversible conveyor belts are installed at the upper ends of the two sets of silos. The outlets of the lime block silos and charcoal block silos are connected to the reversible conveyor belts in the first batching station via two conveyor belts and multiple chutes, for conveying the screened lime blocks and charcoal blocks to the two sets of silos in the first batching station. The reversible conveyor belts at the upper ends of the two sets of silos in the other batching stations are connected to the multiple chutes above the adjacent previous batching station via multiple chutes and transfer conveyor belts, for conveying the screened lime blocks and charcoal blocks to the other batching stations. Below the two sets of silos in each batching station, there are symmetrically arranged feeding belt conveyors running in opposite directions to feed the batched materials into the corresponding calcium carbide furnace ring bucket feeder; weighing hoppers are respectively installed between the discharge port at the lower end of the lime silo and the carbon material silo and the corresponding feeding belt conveyor to realize weighing and batching.

[0007] As a further optimization, the discharge port of each lime kiln is connected to two lime transfer belt conveyors via a first vibrating feeder and a three-way chute.

[0008] As a further preferred embodiment, each lime block silo and charcoal block silo has two discharge ports corresponding to two belt conveyors. A third vibrating feeder is provided between the lower end of each discharge port and the corresponding belt conveyor to control the amount of material fed to the belt conveyor.

[0009] As a further preferred option, a fourth vibrating feeder is installed between the discharge port of each lime silo and the corresponding weighing hopper, and a fifth vibrating feeder is installed between the outlet at the lower end of each weighing hopper and the corresponding feeding belt conveyor, so as to achieve precise material batching.

[0010] As a further preferred embodiment, the discharge end of the feeding belt conveyor is connected to two ring bucket transfer belt conveyors symmetrically arranged above the two ring bucket feeders via a three-way chute and a pipeline.

[0011] The beneficial effects of this utility model are as follows: 1. Only one screening station needs to be set up, and there is no need to set up a screening system in each workshop. Since each batching station includes two sets of silos arranged side by side and four calcium carbide furnaces installed in the two main workshops, the centralized configuration through the batching station greatly reduces the footprint, resulting in a small footprint and low construction cost. 2. Fewer raw material transfers reduce raw material pulverization rate and ensure the particle size requirements of raw materials during calcium carbide furnace production; the entire process can be kept on standby to ensure operational efficiency; overall efficiency is high and land utilization is high. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 A magnified view of a section of the intermediate screening station.

[0014] Figure 3 yes Figure 2 A magnified view of a portion of the batching station.

[0015] In the diagram: lime kiln 101, three-way chute 102, lime transfer belt conveyor 103, first vibrating feeder 104, vertical drying kiln 201, four-way chute 202, charcoal transfer belt conveyor 203, second vibrating feeder 204, emergency silo 205, emergency belt conveyor 206, lime vibrating screen 301, charcoal vibrating screen 302, lime block silo 303, charcoal block silo 304, lime powder silo 305, charcoal powder silo 306, belt conveyor 307, third vibrating feeder 308, multi-way chute 401, charcoal material silo 402, reversible belt conveyor 403, lime silo 404, weighing hopper 405, feeding belt conveyor 406, fifth vibrating feeder 407, transfer belt conveyor 408, fourth vibrating feeder 409, ring bucket feeder 501, ring bucket transfer belt conveyor 502, three-way chute 503. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-3As shown, this utility model relates to a batching system for calcium carbide furnace production, including a lime kiln 101 and a vertical drying kiln 201. A screening station and a batching station are provided between the lime kiln 101 and the vertical drying kiln 201 and the ring bucket feeder of the calcium carbide furnace. The screening station is one unit and includes two lime block silos 303 and two lime powder silos 305, two charcoal block silos 304 and two charcoal powder silos 306, as well as two lime vibrating screens 301 and two charcoal vibrating screens 302. The two lime block silos 303 and two charcoal block silos 304 are arranged in a row and parallel to the two lime powder silos 305 and two charcoal powder silos 306 arranged in another row. The two lime vibrating screens 301 and two charcoal vibrating screens 302 are respectively located above the two lime block silos 303 and two charcoal block silos 304.

[0018] The lime kiln 101 consists of four vertical lime kilns. Each lime kiln 101 has two discharge ports, which are connected to two lime transfer belt conveyors 103 via a first vibrating feeder 104 and a three-way chute 102, respectively. The discharge ends of the two lime transfer belt conveyors 103 are connected to the inlets of two lime vibrating screens 301 via pipelines. The block material outlets of the two lime vibrating screens 301 are connected to the inlets of two lime block silos 303, and the powder material outlets of the two lime vibrating screens 301 are connected to the inlets of two lime powder silos 305.

[0019] There are four vertical drying kilns 201. Each vertical drying kiln 201 has two discharge ports, and the two discharge ports are respectively connected to two charcoal material transfer belt conveyors 203 through a second vibrating feeder 204 and a four-way chute 202. The two second vibrating feeders 204 corresponding to one vertical drying kiln 201 share a four-way chute 202. The four-way chute 202 is an electric four-way chute. Its two outlets are respectively connected to the two charcoal material transfer belt conveyors 203 through pipelines, and its third outlet is connected to the emergency belt conveyor 206 through pipelines and connected to the inlet of the emergency silo 205 through the emergency belt conveyor 206. The discharge ends of the two charcoal conveyor belts 203 are connected to the inlets of two charcoal vibrating screens 302 via pipelines. The block material outlets of the two charcoal vibrating screens 302 are connected to the inlets of two charcoal block material bins 304 via pipelines. The powder material outlets of the two charcoal vibrating screens 302 are connected to the inlets of two charcoal powder material bins 306 via pipelines.

[0020] Each lime block silo 303 and charcoal block silo 304 has two discharge ports corresponding to two belt conveyors 307. A third vibrating feeder 308 is installed between the lower end of each discharge port and the corresponding belt conveyor 307 to control the amount of material fed to the belt conveyor 307. A valve is installed on the pipeline between the lower end of each discharge port and the corresponding third vibrating feeder 308 for easy maintenance.

[0021] The batching stations are multiple and connected sequentially by two conveyor belts 408. Each batching station corresponds to one of the four calcium carbide furnaces installed in two adjacent main workshops. This embodiment takes two batching stations as an example. Each batching station includes two sets of silos arranged side by side. Each set of silos includes four pairs of lime silos 404 and charcoal material silos 402 arranged alternately in sequence. Reversible conveyor belts 403 are installed at the upper ends of the two sets of silos. The outlets of the lime block silos 303 and charcoal block silos 304 are connected to the reversible conveyor belts 403 in the first batching station through two conveyor belts 307 and two multi-channel chutes 401, which are used to transport the screened lime blocks and charcoal blocks to the two sets of silos in the first batching station.

[0022] The reversible conveyor belts 403 at the top of the two sets of silos in the remaining batching stations are connected to one outlet of the two multi-channel chutes 401 above the adjacent previous batching station via multi-channel chutes 401 and two transfer conveyor belts 408. This is used to sequentially transport the screened lime blocks and charcoal blocks to the remaining batching stations. The multi-channel chutes 401 above the last batching station are electric three-way chutes, while the multi-channel chutes 401 above the remaining batching stations are electric four-way chutes.

[0023] Symmetrically arranged below the two sets of silos in each batching station are feeding conveyor belts 406 running in opposite directions, used to feed the batched materials into the corresponding calcium carbide furnace's ring bucket feeder 501. Weighing hoppers 405 are respectively installed between the discharge ports at the lower ends of the lime silo 404 and the corresponding feeding conveyor belts 406 for weighing and batching. A fourth vibrating feeder 409 is installed between the discharge port of each lime silo 404 and the corresponding weighing hopper 405, and a fifth vibrating feeder 407 is installed between the outlet at the lower end of each weighing hopper 405 and the corresponding feeding conveyor belt 406 to facilitate precise batching.

[0024] The discharge end of the feeding belt conveyor 406 is connected to two ring bucket transfer belt conveyors 502 above two ring bucket feeders 501 symmetrically arranged in each main workshop via electric three-way chute 503 and pipeline, so as to convey the prepared materials to the ring bucket feeders 501 above each calcium carbide furnace.

[0025] The steps for working are as follows: 1. The lime produced by the four lime kilns 101 enters the lime transfer belt conveyor 103 through the first vibrating feeder 104 and the three-way chute respectively. After receiving the lime, the transfer belt conveyor sends it to the feed port of the corresponding lime vibrating screen 301. The lime is screened by the lime vibrating screen 301. The lumps on the screen enter the lime lump silo 303, and the powder under the screen enters the lime powder silo 305.

[0026] 2. Simultaneously, four vertical drying kilns 201 convey the dried charcoal material to the charcoal material transfer conveyor 203 via the second vibrating feeder 204 and the four-way chute 202. When the vertical drying kilns 201 are operating normally, the charcoal material is fed into the charcoal material vibrating screen 302 via the charcoal material transfer conveyor 203. When the vertical drying kilns 201 are not operating normally, the charcoal material is fed into the emergency silo via the emergency conveyor. The charcoal material entering the charcoal material vibrating screen 302 is screened. The lumps on the screen enter the charcoal material lump silo 304, and the powders under the screen enter the charcoal material powder silo 306.

[0027] 3. The lime from each lime block silo 303 and the charcoal from each charcoal block silo 304 enter the third vibrating feeder 308 below. The third vibrating feeder 308 controls the feeding into the belt conveyor 307 below, thus entering the batching station.

[0028] 4. The lime and charcoal materials from the screening station are fed into the corresponding lime silo 404 and charcoal material silo 402 in the first batching station via the reversible conveyor belt 403 above the batching station. If other batching stations also require materials, the lime and charcoal materials are sent to the other batching stations via the multi-channel chute 401 and the transfer conveyor belt, and then distributed to the corresponding silos via the reversible conveyor belt above them.

[0029] 5. The lime and charcoal in the lime silo 404 and charcoal material silo 402 are fed into the corresponding weighing hopper 405 by the fourth vibrating feeder. The weighing is carried out by the weighing hopper 405. The fourth vibrating feeder is controlled to feed the material into the feeding belt conveyor 406 below the batching station in a fixed ratio. The material is distributed on the feeding belt conveyor 406 to form a sandwich structure of raw material layer, which ensures the proportion of raw materials.

[0030] 6. The raw materials prepared on the feeding belt conveyor 406 enter the ring bucket transfer belt conveyor 502 through the three-way chute 503, and then are transferred into the ring bucket feeder 501 above each calcium carbide furnace.

[0031] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A batching system for calcium carbide furnace production, comprising a lime kiln and a vertical drying kiln, wherein a screening station and a batching station are provided between the lime kiln and the vertical drying kiln and the calcium carbide furnace, characterized in that: The screening station consists of one and includes two lime block silos and two lime powder silos, two charcoal block silos and two charcoal powder silos, as well as two lime vibrating screens and two charcoal vibrating screens. The discharge port of each lime kiln is connected to the inlet of the two lime vibrating screens via two lime transfer belt conveyors. The block material outlet of the two lime vibrating screens is connected to the inlet of the two lime block silos in a one-to-one correspondence, and the powder material outlet of the two lime vibrating screens is connected to the inlet of the two lime powder silos in a one-to-one correspondence. The discharge port of the vertical drying kiln is connected to the inlet of two charcoal material vibrating screens via two charcoal material transfer belts. The block material outlet of the two charcoal material vibrating screens is connected to the inlet of the two charcoal material block material bins in a one-to-one correspondence. The powder material outlet of the two charcoal material vibrating screens is connected to the inlet of the two charcoal material powder material bins in a one-to-one correspondence. The batching station consists of multiple stations, each corresponding to one of the four calcium carbide furnaces installed in the two main workshops. Each batching station includes two sets of silos arranged side by side. Each set of silos includes four pairs of lime silos and charcoal silos arranged alternately. Reversible conveyor belts are installed at the upper ends of the two sets of silos. The outlets of the lime block silos and charcoal block silos are connected to the reversible conveyor belts in the first batching station through two conveyor belts and multiple chutes, which are used to transport the screened lime blocks and charcoal blocks to the two sets of silos in the first batching station. The reversible conveyor belts at the top of the two sets of silos in the other batching stations are connected to the multi-channel chute above the adjacent previous batching station through multi-channel chutes and transfer conveyor belts, which are used to transfer the screened lime blocks and charcoal blocks to the other batching stations respectively. Below the two sets of silos in each batching station, there are symmetrically arranged feeding belt conveyors running in opposite directions to feed the batched materials into the corresponding calcium carbide furnace ring bucket feeder; weighing hoppers are respectively installed between the discharge port at the lower end of the lime silo and the carbon material silo and the corresponding feeding belt conveyor to realize weighing and batching.

2. The calcium carbide furnace production batching system according to claim 1, characterized in that: The discharge port of each lime kiln is connected to two lime transfer belt conveyors via a first vibrating feeder and a three-way chute.

3. The calcium carbide furnace production batching system according to claim 1, characterized in that: Each lime block silo and charcoal block silo has two discharge ports corresponding to two belt conveyors. A third vibrating feeder is installed between the lower end of each discharge port and the corresponding belt conveyor to control the amount of material fed to the belt conveyor.

4. The calcium carbide furnace production batching system according to claim 1, characterized in that: in A fourth vibrating feeder is installed between the discharge port of each lime silo and the corresponding weighing hopper, and a fifth vibrating feeder is installed between the outlet at the lower end of each weighing hopper and the corresponding feeding belt conveyor, so as to achieve precise material batching.

5. The calcium carbide furnace production batching system according to any one of claims 1-4, characterized in that: The discharge end of the feeding belt conveyor is connected to two ring bucket transfer belt conveyors symmetrically located above the two ring bucket feeders via a three-way chute and a pipeline.

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