Conveying system and method for irregular materials in limited operation space

Abstract

The invention belongs to the technical field of iron and steel smelting, and particularly relates to a conveying system and method for irregular materials in a limited operation space, and the conveying system comprises a composite crusher, a Z-shaped bucket elevator, a vertical storage bin and a negative pressure suction and discharge vehicle, an inlet of the compound crusher is communicated with an outlet of the lime blanking bin through a star-shaped feeder; an outlet of the composite crusher is communicated with an inlet of the Z-shaped bucket elevator through a sealing cover, an outlet of the Z-shaped bucket elevator is located at a top opening of the vertical storage bin, a bottom outlet of the vertical storage bin is connected with the negative pressure suction and discharge vehicle through a hose, and material conveying is completed through coarse crushing, lifting conveying, storage and negative pressure suction and discharge. The device has the beneficial effects that a combined scheme of coarse crushing, lifting conveying, storage and negative pressure suction and discharge is adopted for lime screen blanking, and limitation in a limited operation space is overcome; the whole conveying process is good in sealing performance and free of flying dust, and the relevant requirements of the environmental protection department for the production environment are met.

Description

Technical Field

[0001] The invention belongs to the technical field of steel smelting, and in particular relates to a conveying system and method for irregular materials in a limited working space. Background Art

[0002] In steel smelting production, lime screened material needs to be mixed with fluorite in a ratio of 9:1 to manufacture KR desulfurization powder for use in molten iron desulfurization. Compared with the magnesium powder composite injection method, the desulfurization cost is greatly reduced. For this reason, in the KR method desulfurization transformation, lime screened material with self-owned production process is mostly used to manufacture KR desulfurization powder. Since the receiving position of lime screened material is close to the torpedo tank molten iron transportation railway line on the east side and the low-voltage distribution room on the south side, the space is very narrow and the receiving door is only about 5 meters wide. The conventional belt corridor cannot realize the receiving and transportation in terms of position and space. The transportation process of irregular materials in the limited working space must be redesigned to meet the requirements.

[0003] The Chinese invention patent with application number 202111035957.6 discloses an application method of blowing-assisted technology in a dust removal system. The blowing-assisted device of the dust removal system includes an ash hopper, one side of the ash hopper is fixedly connected to a blowing-assisted pipe assembly, one end of the blowing-assisted pipe assembly is provided with an air compressor, the bottom end of the ash hopper is fixedly connected to an ash discharge pipe, the bottom end of the ash discharge pipe is provided with an ash discharge valve, and the bottom end of the ash discharge pipe is fixedly connected to a rubber hose adjacent to the ash discharge valve. By adding a blowing-assisted pipe assembly using compressed air at the bottom of the ash hopper of the dust removal system, the problem of dust hanging in the air is avoided, the problem that dust cannot be transported using a negative pressure suction and discharge vehicle is solved, the phenomenon of secondary pollution when an open dump truck discharges dust is eliminated, and the labor intensity is reduced. Summary of the invention

[0004] The purpose of the present invention is to provide a conveying system and method for irregular materials in a limited working space, overcome the shortcomings of the prior art, adopt a combination of coarse crushing + lifting and conveying + storage + negative pressure suction and discharge for the lime screened materials, so that the irregular lime screened materials meet the particle size requirements of negative pressure suction and discharge after coarse crushing, and use a 15 cubic meter negative pressure suction and discharge vehicle to receive the materials, thus overcoming the limitations in the limited working space and meeting environmental protection requirements.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] One of the technical solutions: a conveying system for irregular materials in a limited working space, comprising a compound crusher, a Z-type bucket elevator, a vertical storage bin and a negative pressure suction and discharge vehicle, the compound crusher is arranged below the lime lower bin, the inlet of the compound crusher is connected with the outlet of the lime lower bin through a star feeder; the outlet of the compound crusher is connected with the inlet of the Z-type bucket elevator by a closed cover, the outlet of the Z-type bucket elevator is located at the top opening of the vertical storage bin, and the bottom outlet of the vertical storage bin is connected with the negative pressure suction and discharge vehicle through a hose, and the material transportation is completed through coarse crushing, lifting and conveying, storage, and negative pressure suction and discharge, thereby overcoming the problem of insufficient space below the lime lower bin.

[0007] Furthermore, the model of the compound crusher is HX1060, and the diameter of the matching screen is 3mm.

[0008] Furthermore, the model of the negative pressure suction and exhaust vehicle is ZLQ53, and the vehicle is equipped with a negative pressure pump and a cyclone dust collector.

[0009] Furthermore, the model of the Z-type bucket elevator is HY-ZD-5L, the lifting height is 5.2 meters, and the translation distance of the inlet and outlet is 3.3 meters.

[0010] Furthermore, the vertical storage bin is arranged on a supporting structure frame, and a star-shaped discharger, an air shut-off valve or an ash discharge valve is provided at the bottom outlet thereof; the volume of the vertical storage bin matches the volume of the negative pressure suction and exhaust vehicle.

[0011] Furthermore, a dust removal hood is provided at the top inlet of the vertical storage bin, and the dust removal hood is connected to the dust removal pipeline and the dust removal fan; an electric vibrator is provided on the side wall of the vertical storage bin.

[0012] Technical Solution 2: A method for conveying irregular materials in a limited working space, which completes the material conveying by coarsely crushing, lifting and conveying, storing, and negative pressure suction and discharge of the lime screened materials in sequence. The specific operation steps are as follows:

[0013] 1) The compound crusher crushes the lime screened material to a diameter of less than 3mm;

[0014] 2) The Z-shaped bucket elevator moves the coarse lime material horizontally and then lifts it for transportation;

[0015] 3) The negative pressure suction and discharge vehicle sucks the ash in the vertical storage bin. The controller controls the star-shaped feeder of the ash discharge bin, the compound crusher, the Z-shaped bucket elevator, the star-shaped discharger of the vertical storage bin, the dust removal fan of the vertical storage bin and the negative pressure suction and discharge vehicle in linkage. After the negative pressure suction and discharge vehicle is full, the hose is removed and the negative pressure suction and discharge vehicle transports the material to the KR desulfurization powder preparation workshop.

[0016] Furthermore, the composite crusher has a coarse lime output of 10-15 tons / hour.

[0017] Furthermore, the coarse crushing and negative pressure suction and drainage are not carried out synchronously. During the crushing time, the negative pressure suction and drainage vehicle is used for transportation. When the vertical storage bin is full, the compound crusher is stopped and the negative pressure suction and drainage vehicle returns to start sucking materials.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) A combination of coarse crushing + lifting and conveying + storage + negative pressure suction and discharge is adopted for the lime screened materials. The irregular lime screened materials are crushed to meet the particle size requirements of negative pressure suction and discharge, and a 15 cubic meter negative pressure suction and discharge vehicle is used to receive the materials. Negative pressure suction and discharge can better overcome the constraints in the limited working space and improve the material transmission efficiency;

[0020] 2) The entire conveying process is well sealed and dust-free, meeting the relevant requirements of the environmental protection department for the production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the process flow of an embodiment of the present invention.

[0022] In the figure: 1-lime discharge bin, 2-compound crusher, 3-Z-type bucket elevator, 4-vertical storage bin, 5-negative pressure suction and discharge vehicle, 6-star feeder, 7-hose, 8-star discharger, 9-dust removal hood, 10-dust removal pipeline, 11-dust removal fan, 12-electric vibrator. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the present invention. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0025] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the invention claimed, but merely represents selected embodiments of the present invention.

[0026] See Figure 1, is a process flow diagram of an embodiment of a conveying system for irregular materials in a limited working space of the present invention, comprising a compound crusher 2, a Z-type bucket elevator 3, a vertical storage bin 4 and a negative pressure suction and discharge vehicle 5. The compound crusher 2 is arranged below the lime lower bin 1, and the inlet of the compound crusher 2 is connected to the outlet of the lime lower bin 1 through a star feeder 6; the outlet of the compound crusher 2 is connected to the inlet of the Z-type bucket elevator 3 through a closed cover, the outlet of the Z-type bucket elevator 3 is located at the top opening of the vertical storage bin 4, and the bottom outlet of the vertical storage bin 4 is connected to the negative pressure suction and discharge vehicle 5 through a hose 7, and the conveying of the materials is completed through coarse crushing, lifting and conveying, storage, and negative pressure suction and discharge. The connection between each device is covered with a closed cover to avoid dust.

[0027] The manufacturer of compound crusher 2 is Henan Hongxing Mining Machinery Co., Ltd. The specification model is HX1060. The matching screen diameter is 3mm. The main parameters of the equipment are shown in Table 1.

[0028] Table 1

[0029]

[0030] Negative pressure suction and exhaust vehicle 5 is produced by Jinan Zhonglu Special Automobile Co., Ltd., with specification model ZLQ53. The vehicle is equipped with a negative pressure pump and a cyclone dust collector. The main parameters of the equipment are shown in Table 2.

[0031] Table 2

[0032]

[0033] The manufacturer of the Z-type bucket elevator 3 is Xinxiang Hengyu Machinery Equipment Co., Ltd. The specification model is HY-ZD-5L, the lifting height is 5.2 meters, the translation distance is 3.3 meters, and the main parameters of the equipment are shown in Table 3.

[0034] Table 3

[0035]

[0036] The vertical storage bin 4 is arranged on the supporting structure frame, and a star-shaped discharger 8, an air shut-off valve or an ash discharge valve are arranged at the bottom outlet thereof; the volume of the vertical storage bin 4 matches the volume of the negative pressure suction and discharge vehicle 5. A dust removal hood 9 is arranged at the top inlet of the vertical storage bin 4, and the dust removal hood is connected to a dust removal pipeline 10 and a dust removal fan 11, and is used to capture the dust on the top of the vertical storage bin 4. An electric vibrator 12 is arranged on the side wall of the vertical storage bin, and is used to solve the problem that the lime accumulates in the vertical storage bin 4 and does not fall down.

[0037] The present invention discloses a method for conveying irregular materials in a limited working space, which completes the conveying of materials by sequentially coarsely crushing, lifting and conveying, storing, and negative pressure suction and discharge of lime screened materials, thereby overcoming the problem of insufficient space below the lime unloading bin; the specific operation steps are as follows:

[0038] 1) The compound crusher 2 crushes the lime discharged from the lime discharge bin 1 to a diameter below 3 mm, and the coarse lime output of the compound crusher 2 is 10-15 tons / hour; the crushing step here not only enables the particle size of the lime to meet the requirements of the negative pressure suction and discharge vehicle 5, but also is equivalent to bringing forward the crushing step that must be done in the KR desulfurization powder preparation workshop in the conventional transportation method, and there is no waste of energy;

[0039] 2) The Z-shaped bucket elevator 3 lifts and transports the coarsely crushed lime material, and the conveying capacity of the Z-shaped bucket elevator 3 matches the output of the compound crusher 2; the Z-shaped bucket elevator 3 first moves the lime horizontally to a position with loose space, and then lifts it to the vertical storage bin 4;

[0040] 3) The negative pressure suction and discharge vehicle 5 sucks the lime in the vertical storage bin 4, and the controller controls the star feeder 6 of the lime lower bin 1, the compound crusher 2, the Z-type bucket elevator 3, the star discharger 8 of the vertical storage bin 4, the dust removal fan 11 of the vertical storage bin 4 and the negative pressure suction and discharge vehicle 5 in linkage. After the negative pressure suction and discharge vehicle 5 is full, the hose 7 is withdrawn, and the negative pressure suction and discharge vehicle 5 transports the material to the KR desulfurization powder preparation workshop. The unique feeding method of the negative pressure suction and discharge vehicle 5 minimizes the situation where it is restricted by the working space.

[0041] When the negative pressure suction and discharge vehicle 5 is working, the suction function relies on the suction effect of the air source machinery to form a certain vacuum degree in the vehicle tank and pipe system, and uses the moving air with the necessary flow rate to suck the material from the ground silo through the pipeline into the vehicle tank; Positive pressure discharge: Pressurized pneumatic conveying uses compressed air to blow materials. The pressure of the conveying pipe is higher than the atmospheric pressure. The vehicle is equipped with an air compressor (air source machinery). The air compressor exhausts air into the tank to generate air pressure in the tank. The vehicle tank has a built-in air storage chamber and a fluidized bed. The air flows into the air storage chamber and slowly penetrates into the tank through the fluidized bed to increase the mixing ratio of air and material. At the same time, pressure is also formed in the tank, and the material is discharged outward through the pipeline.

[0042] In the conveying system of irregular materials in a limited working space of the present invention, coarse crushing and negative pressure suction and discharge can be carried out asynchronously. During the crushing time, the negative pressure suction and discharge vehicle 5 is used for transportation. When the vertical storage bin 4 is full, the compound crusher 2 is stopped and the negative pressure suction and discharge vehicle 5 starts to absorb the material.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conveying system for irregular materials in a limited working space, characterized in that: The invention comprises a compound crusher, a Z-type bucket elevator, a vertical storage bin and a negative pressure suction and discharge vehicle. The compound crusher is arranged below the lime lower bin, and the inlet of the compound crusher is connected with the outlet of the lime lower bin through a star feeder; the outlet of the compound crusher is connected with the inlet of the Z-type bucket elevator through a closed cover, the outlet of the Z-type bucket elevator is located at the top opening of the vertical storage bin, and the bottom outlet of the vertical storage bin is connected with the negative pressure suction and discharge vehicle through a hose, and the material transportation is completed through coarse crushing, lifting and conveying, storage, and negative pressure suction and discharge, thereby overcoming the problem of insufficient space below the lime lower bin.

2. A conveying system for irregular materials in a limited working space according to claim 1, characterized in that: The model of the compound crusher is HX1060, and the diameter of the matching screen is 3mm.

3. A conveying system for irregular materials in a limited working space according to claim 1, characterized in that: The model of the negative pressure suction and exhaust vehicle is ZLQ53, and the vehicle is equipped with a negative pressure pump and a cyclone dust collector.

4. A conveying system for irregular materials in a limited working space according to claim 1, characterized in that: The model of the Z-type bucket elevator is HY-ZD-5L, the lifting height is 5.2 meters, and the translation distance of the inlet and outlet is 3.3 meters.

5. The conveying system for irregular materials in a limited working space according to claim 1, characterized in that: The vertical storage bin is arranged on a supporting structure frame, and a star-shaped discharger, an air shut-off valve or an ash discharge valve is arranged at the bottom outlet thereof; the volume of the vertical storage bin matches the volume of the negative pressure suction and discharge vehicle.

6. A conveying system for irregular materials in a limited working space according to claim 1, characterized in that: A dust removal hood is provided at the top inlet of the vertical material storage bin, and the dust removal hood is connected to a dust removal pipeline and a dust removal fan; an electric vibrator is provided on the side wall of the vertical material storage bin.

7. A method for conveying irregular materials in a limited working space, characterized in that: The material conveying is completed by coarse crushing, lifting, conveying, storage, and negative pressure suction and discharge of the lime screened material in sequence. The specific operation steps are as follows: 1) The compound crusher crushes the lime screened material to a diameter of less than 3mm; 2) The Z-shaped bucket elevator moves the coarse lime material horizontally and then lifts it for transportation; 3) The negative pressure suction and discharge vehicle sucks the ash in the vertical storage bin. The controller controls the star-shaped feeder of the ash discharge bin, the compound crusher, the Z-shaped bucket elevator, the star-shaped discharger of the vertical storage bin, the dust removal fan of the vertical storage bin and the negative pressure suction and discharge vehicle in linkage. After the negative pressure suction and discharge vehicle is full, the hose is removed and the negative pressure suction and discharge vehicle transports the material to the KR desulfurization powder preparation workshop.

8. A method for conveying irregular materials in a limited working space according to claim 7, characterized in that: The coarse lime production of the compound crusher is 10-15 tons / hour.

9. A method for conveying irregular materials in a limited working space according to claim 7, characterized in that: The coarse crushing and negative pressure suction and discharge are not carried out synchronously. During the crushing time, the negative pressure suction and discharge vehicle is used for transportation. When the vertical storage bin is full, the compound crusher stops and the negative pressure suction and discharge vehicle returns to start sucking materials.

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