Production system for producing calcium oxide by using calcium carbide furnace purification ash

Abstract

The utility model belongs to the technical field of calcium oxide production, and discloses a production system for producing calcium oxide by using purified ash of a calcium carbide furnace, which comprises a cooling device, a purified ash collecting device, a first spiral conveying pipe, a hot air drying device, a second spiral conveying pipe, a third spiral conveying pipe, a screening device and a high-temperature calcining furnace, a purified ash outlet pipe of the cooling device is connected with the purified ash collecting device, the purified ash collecting device is connected with the hot air drying device through a first spiral conveying pipe, the hot air drying device is connected with the screening device through a second spiral conveying pipe, and the screening device is connected with the high-temperature calcining furnace through a third spiral conveying pipe. According to the production system for producing calcium oxide from the calcium carbide furnace purified ash, the calcium carbide furnace purified ash serves as a raw material, calcium oxide is prepared and produced after cooling, purified ash collecting, drying, screening and high-temperature calcination are conducted, and the situation that the calcium carbide furnace gas purified ash is stacked or buried in a concentrated mode after being solidified, land is occupied, and the environment is polluted is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of calcium oxide production, and in particular relates to a production system for producing calcium oxide by utilizing purified ash from a calcium carbide furnace. Background Art

[0002] The main components of calcium carbide furnace gas purification ash are CaO, C, CaC (calcium carbide) and trace impurities such as MgO, SiO2, AL2O3, etc. The combustion calorific value is 1600-1800 kcal / kg. The calcium carbide furnace gas purification ash material is in powder state, with the characteristics of high temperature, small particle size, light specific gravity, and large specific surface area. It is very easy to pollute the environment with dust during stacking. Calcium carbide furnace gas purification ash contains calcium carbide hazardous chemicals and carbon components. When exposed to the air, it is very easy to spontaneously combust and endanger the safety of people and property.

[0003] At present, calcium carbide furnace gas purification ash is solidified and then disposed of by centralized stacking or burial. In the long run, stacking and burial will occupy a large amount of land resources and cause pollution to the surrounding environment. Utility Model Content

[0004] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a production system for producing calcium oxide using purified ash from a calcium carbide furnace. The purified ash from a calcium carbide furnace is used as raw material, and calcium oxide is prepared after cooling, collection of the purified ash, drying, screening, and high-temperature calcination.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a production system for producing calcium oxide by utilizing purified ash from a calcium carbide furnace, the production system comprising a cooling device, a purified ash collecting device, a first spiral conveying pipe, a hot air drying device, a second spiral conveying pipe, a third spiral conveying pipe, a screening device, and a high-temperature calcining furnace, the purified ash outlet pipe of the cooling device being connected to the purified ash collecting device, the purified ash collecting device being connected to the hot air drying device through the first spiral conveying pipe, the hot air drying device being connected to the screening device through the second spiral conveying pipe, and the screening device being connected to the high-temperature calcining furnace through the third spiral conveying pipe.

[0006] Furthermore, the cooling device includes a purified ash inlet pipe, the purified ash inlet pipe is connected to the cooling pipe, and the output end of the cooling pipe is connected to the purified ash outlet pipe.

[0007] Furthermore, the purified ash collection device includes a separator, a filter tank is provided at the lower end of the separator, a first filter screen is provided in the filter tank, a storage tank is provided at the lower end of the filter tank, a discharge pipe is provided at the outlet end of the storage tank, a first powder butterfly valve is provided on the discharge pipe, an exhaust pipe is connected to the side of the separator, and the exhaust pipe is connected to the negative pressure pump.

[0008] Furthermore, the hot air drying device includes a drying tank, a second powder butterfly valve is provided at the bottom outlet end of the drying tank, and a hot air pipe is provided at the lower end of the drying tank.

[0009] Furthermore, an inclined second filter screen is provided inside the screening device, a vibration motor is provided on the left side of the screening device, and an impurity discharge trough is provided on the right side of the screening device.

[0010] The utility model has the following beneficial effects:

[0011] The utility model provides a production system for producing calcium oxide by utilizing purified ash from a calcium carbide furnace. The purified ash from the calcium carbide furnace is used as raw material, and is prepared to produce calcium oxide after passing through a cooling device, a purified ash collecting device, a hot air drying device, a screening device, and a high-temperature calcining furnace. The cooling device cools the purified ash from the calcium carbide furnace, a negative pressure pump of the purified ash collecting device provides a negative pressure environment, and a separator separates gas and purified ash.

[0012] A first screen is provided inside the purified ash collection device, which separates larger particles and impurities in the purified ash under the action of gravity. The separated purified ash falls into the storage tank by gravity. A discharge pipe is provided at the bottom of the storage tank to facilitate subsequent processing. The hot air drying device dries the collected purified ash to remove moisture and ensure the efficiency of subsequent processes. The screening device grades the dried purified ash to remove impurities and ensure the purity of the calcium oxide component. The treated purified ash is sent to a high-temperature calcining furnace to generate calcium oxide, avoiding the centralized stacking or burial of the stone furnace gas purified ash after solidification, which occupies a large amount of land resources and avoids the pollution to the surrounding environment caused by stacking or burying. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the cooling device and the purified ash collection device of the utility model;

[0015] Figure 3 This is a schematic diagram of a partial cross-sectional structure of the purified ash collection device of the present utility model;

[0016] Figure 4 This is a schematic structural diagram of the hot air drying device of the utility model;

[0017] Figure 5 This is a schematic diagram of the internal structure of the screening device of the present invention.

[0018] Legend:

[0019] 1-Cooling device, 101-Purified ash inlet pipe, 102-Cooling pipe, 103-Purified ash outlet pipe, 2-Purified ash collection device, 201-Separator, 202-Filter tank, 203-Negative pressure pump, 204-Exhaust pipe, 205-First filter screen, 206-Storage tank, 207-First powder butterfly valve, 208-Discharge pipe, 3-First spiral feed pipe, 4-Hot air drying device, 401-Drying tank, 402-Second powder butterfly valve, 403-Hot air pipe, 5-Second spiral feed pipe, 6-Third spiral feed pipe, 7-Screening device, 701-Second filter screen, 702-Impurity discharge trough, 703-Vibration motor, 8-High-temperature calcining furnace. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Reference Figure 1-Figure 5 The utility model provides a production system for producing calcium oxide by utilizing purified ash from a calcium carbide furnace, comprising a cooling device 1, a purified ash collecting device 2, a first spiral feed pipe 3, a hot air drying device 4, a second spiral feed pipe 5, a third spiral feed pipe 6, a screening device 7, and a high-temperature calcining furnace 8.

[0022] The purified ash outlet pipe 103 of the cooling device 1 is connected to the purified ash collecting device 2, the purified ash collecting device 2 is connected to the hot air drying device 4 through the first spiral conveying pipe 3, the hot air drying device 4 is connected to the screening device 7 through the second spiral conveying pipe 5, and the screening device 7 is connected to the high-temperature calcining furnace 8 through the third spiral conveying pipe 6.

[0023] The purified ash inlet pipe 101 of the cooling device 1 is connected to the cooling pipe 102, and the output end of the cooling pipe 102 is connected to the purified ash outlet pipe 103. The purified ash from the high-temperature calcium carbide furnace is cooled by the cooling device 1 and then enters the purified ash collecting device 2. The lower end of the separator 201 of the purified ash collecting device 2 is provided with a filter tank 202. The separator 201 separates the cooled purified ash from the calcium carbide furnace and the gas.

[0024] A first filter screen 205 is provided in the filter tank 202, and the purified ash under gravity is filtered through the first filter screen 205. A storage tank 206 is provided at the lower end of the filter tank 202, and the filtered purified ash is deposited and stored in the storage tank.

[0025] The outlet end of the storage tank 206 is provided with a discharge pipe 208, and the discharge pipe 208 is provided with a first powder butterfly valve 207. The side of the separator 201 is connected to an exhaust pipe 204, and the exhaust pipe 204 is connected to the negative pressure pump 203. The bottom outlet end of the drying tank 401 of the hot air drying device 4 is provided with a second powder butterfly valve 402, and the lower end of the drying tank 401 is provided with a hot air pipe 403 to continuously provide hot air to the drying tank 401 for drying. An inclined second filter screen 701 is provided on the inside of the screening device 7, a vibration motor 703 is provided on the left side of the screening device 7, and an impurity discharge trough 702 is provided on the right side of the screening device 7. The screening device 7 classes the dried purified ash, removes impurities, ensures the purity of the calcium oxide component, and the impurities are discharged through the impurity discharge trough 702.

[0026] The separator 201 is a shutter separator, and the hot air drying device 4 can be directly purchased and used in the market.

[0027] Working process: When in use, first turn on the negative pressure pump 203 of the purified ash collecting device 2, and negative pressure is formed in the tank of the purified ash collecting device 2. The cooling device 1 connected to the purified ash collecting device 2 is affected by the negative pressure, and the purified ash from the calcium carbide furnace enters the cooling device 1, passes through the purified ash inlet pipe 101 and enters the cooling pipe 102, completes heat exchange with the outside air in the cooling pipe 102, and enters the purified ash outlet pipe 103 after completing the heat exchange. The purified ash outlet pipe 103 is connected to the purified ash collecting device 2, and the purified ash after cooling enters the separator 201, completes the separation of the purified ash and the gas in the separator, and the gas is discharged along the exhaust pipe 204, and then re The purified ash separated by the force is filtered downward through the first filter screen 205, and the filtered purified ash is deposited and stored in the storage tank. After a period of time, the first powder butterfly valve 207 on the discharge pipe 208 is opened, and the purified ash is transported to the hot air drying device 4 through the first spiral conveying pipe 3. After drying in the hot air drying device 4, the second powder butterfly valve 402 is opened, and the dried purified ash is transported to the screening device 7 through the second spiral conveying pipe. The vibration motor 703 is started, and the purified ash is classified in the screening device 7 to remove impurities and ensure the purity of the calcium oxide component. It is then transported to the high-temperature calcining furnace 8 through the third spiral conveying pipe 6 for calcination to generate calcium oxide.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A production system for producing calcium oxide using calcium carbide furnace purified ash, characterized in that: The production system comprises a cooling device (1), a purified ash collecting device (2), a first spiral conveying pipe (3), a hot air drying device (4), a second spiral conveying pipe (5), a third spiral conveying pipe (6), a screening device (7), and a high-temperature calcining furnace (8), wherein the purified ash outlet pipe (103) of the cooling device (1) is connected to the purified ash collecting device (2), the purified ash collecting device (2) is connected to the hot air drying device (4) via the first spiral conveying pipe (3), the hot air drying device (4) is connected to the screening device (7) via the second spiral conveying pipe (5), and the screening device (7) is connected to the high-temperature calcining furnace (8) via the third spiral conveying pipe (6).

2. A production system for producing calcium oxide by using calcium carbide furnace purified ash according to claim 1, characterized in that: The cooling device (1) comprises a purified ash inlet pipe (101), the purified ash inlet pipe (101) is connected to a cooling pipe (102), and the output end of the cooling pipe (102) is connected to a purified ash outlet pipe (103).

3. A production system for producing calcium oxide by using calcium carbide furnace purified ash according to claim 1, characterized in that: The purified ash collection device (2) comprises a separator (201), a filter tank (202) is provided at the lower end of the separator (201), a first filter screen (205) is provided in the filter tank (202), a storage tank (206) is provided at the lower end of the filter tank (202), a discharge pipe (208) is provided at the outlet end of the storage tank (206), a first powder butterfly valve (207) is provided on the discharge pipe (208), an exhaust pipe (204) is connected to the side of the separator (201), and the exhaust pipe (204) is connected to the negative pressure pump (203).

4. A production system for producing calcium oxide by using calcium carbide furnace purified ash according to claim 1, characterized in that: The hot air drying device (4) comprises a drying tank (401), a second powder butterfly valve (402) is provided at the bottom outlet end of the drying tank (401), and a hot air pipe (403) is provided at the lower end of the drying tank (401).

5. The production system for producing calcium oxide by using calcium carbide furnace purified ash according to claim 1, characterized in that: An inclined second filter screen (701) is provided inside the screening device (7), a vibration motor (703) is provided on the left side of the screening device (7), and an impurity discharge trough (702) is provided on the right side of the screening device (7).

Images