Gas film spraying agent and use method thereof

Abstract

The invention relates to the technical field of steel coking, in particular to a gas film spraying agent and a using method thereof. The gas film spraying agent is composed of a high-viscosity liquid foaming agent A and a foam stabilizer liquid B; the preparation method comprises the following steps: uniformly mixing an agent A and an agent B according to a volume ratio of 100: (5-25), and mixing with water to prepare an aqueous solution with the mass percent concentration of 1-5%. Storing the gas film spraying agent in a water storage tank of a spraying system, adding water into the water storage tank, and stirring to prepare a dilute water solution D with the mass percent concentration of 0.5-1%; spraying the dilute aqueous solution D to a chute outlet position of a coke conveying belt, so that tiny particles raised on the surface of the coke are adsorbed to the coke, and meanwhile, a tiny unit protective film is formed on the surface of the coke for dust falling; and spraying the dilute aqueous solution D through a belt spraying system at a chute outlet of the coke conveying belt, so that tiny particles raised on the surface of the coke are adsorbed to the coke, and meanwhile, a tiny unit protective film is formed on the surface of the coke to isolate dust fall.

Description

Technical Field

[0001] The invention relates to the technical field of steel coking, in particular to an air film spray agent and a use method thereof. Background Art

[0002] With the rapid development of the steel industry and the vigorous expansion of steel production capacity, the enhancement of environmental awareness and the increasing environmental pressure on enterprises, the dust problem in the coke exhaust and transportation system has become the top priority of visual pollution.

[0003] The harm of dust to equipment: ① The harm to the belt motor. Due to the small particle size of dust, it covers the outer cover of the motor and the fan, resulting in poor heat dissipation of the motor, resulting in reduced insulation of the motor, which may burn out during use. ② The harm to the safety switch box and lighting switch box at the head and tail of the belt machine. Due to the high dust concentration and fine particle size, it is easy to enter various sealed switch boxes, which can easily cause electrical connection, explosion, and even fire over time. ③ The harm to various belt safety facilities. Each belt position is equipped with a power switch, a start switch, and an accident switch (safety rope) at the head and tail of the machine. The belt often stops for no reason due to dust, and the safety rope does not work well, which affects production and brings great hidden dangers to production and personal safety. The harm of dust to post personnel: Due to the high dust concentration and fine particle size, the dust masks used by post workers cannot filter fine dust very well, and respiratory diseases are likely to occur over time.

[0004] In recent years, as steel companies have paid more and more attention to dust pollution generated by the coking process, technicians have continuously proposed new methods for coke removal and dust reduction. Although the dust reduction effect of the coke transport system can be achieved, dry mist dust suppression and spray dust reduction have little effect on long-distance belts. The infrastructure investment for establishing a ground dust removal station is huge, and it is difficult for the existing belt system to have a large space to support the establishment of a ground dust removal station. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides an air film spray agent and a method for using the same, which intervenes from the chute outlet to solve the dust problem during the transportation of coke from the dry quenching coke tank to the coke transport belt during multiple continuous coke transport belts, thereby effectively reducing the dust pollution problem of coke during the transportation process.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An air film spray agent is composed of a high-viscosity liquid foaming agent A and a foam stabilizing agent liquid B; the air film spray agent is prepared by mixing agent A and agent B in a volume ratio of 100: (5-25), and then mixing them evenly with water to form an aqueous solution with a mass percentage concentration of 1-5%.

[0008] Furthermore, the air film spray agent is prepared by dissolving agent A and agent B in water to prepare separate aqueous solutions, and then mixing the separate aqueous solutions with water to prepare a 1-5% aqueous solution with a volume ratio of agent A to agent B of 100:(5-25).

[0009] Furthermore, the agent A is an alkyl polysaccharide, and the agent B is an alkyl alcohol amide nonionic surfactant.

[0010] Furthermore, the agent A is a hydrofluoroalkane, and the agent B is an alkyl alcohol amide.

[0011] Furthermore, the air film spray agent is prepared by mixing hydrofluoroalkane and alkyl alcohol amide in a ratio of 100: (8-20) and then dissolving in water to prepare an aqueous solution with a total mass percentage concentration of 3-5%.

[0012] Furthermore, the air film spray agent is prepared by mixing hydrofluoroalkane and alkyl alcohol amide in a ratio of 100:10 and then dissolving them in water to prepare an aqueous solution with a total mass percentage concentration of 5%.

[0013] Furthermore, the air film spray agent is prepared by dissolving hydrofluoroalkane and alkyl alcohol amide separately in water to prepare a 10% aqueous solution, and then mixing the two to form an aqueous solution with a mass percentage concentration of 5%.

[0014] The method for using the above-mentioned air film spray agent specifically comprises the following steps:

[0015] 1) The air film spray agent is stored in a water reservoir of the spray system, and water is added to the water reservoir and stirred to form a dilute aqueous solution D with a mass percentage concentration of 0.5 to 1%;

[0016] 2) Spray the dilute aqueous solution D to the chute outlet of the coke conveyor belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to reduce dust;

[0017] 3) The dilute aqueous solution D is sprayed through the belt spray system at the chute outlet of the coke transport belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to isolate dust.

[0018] Furthermore, in step 1), the mass percentage concentration of the dilute aqueous solution D is 0.5%.

[0019] Furthermore, in the step 2), the dilute aqueous solution D is sprayed to the chute outlet of the coke transport belt by a water pump;

[0020] Furthermore, in the step 4), the dilute aqueous solution D is sprayed onto the coke at the outlet of the CDQ coke discharge belt chute by a water pump under pressure.

[0021] The compositions of the A and B agents referred to in the present invention are as follows:

[0022] Foaming agents are substances that make the target substance pore-forming. They can be divided into three categories: chemical foaming agents, physical foaming agents, and surfactants. Chemical foaming agents are compounds that can release gases such as carbon dioxide and nitrogen after heating and decomposition, and form pores in the polymer composition; physical foaming agents are compounds whose foam pores are formed by the change of the physical form of a certain substance, that is, by the expansion of compressed gas, the volatilization of liquid, or the dissolution of solid. Foaming agents have high surface activity, can effectively reduce the surface tension of liquids, and arrange double electron layers on the surface of the liquid film to surround the air to form bubbles, and then single bubbles form foam.

[0023] Foam stabilizers are substances that can improve the stability of bubbles and prolong the half-life of foam collapse. Foam stabilizers are substances that stabilize foam. Foam stabilizer products are pollution-free, easy to use (no soaking required), highly wettable, and low in dosage [30-50 grams per cubic meter of aerated concrete, with low overall cost, and are ideal special admixtures for high-quality aerated concrete production. Dodecyl dimethylamine oxide, alkyl alcohol amide, the foam stabilization mechanism of this type of substance is to reduce the repulsive force of the anionic group of the liquid film anionic surfactant to achieve foam stabilization.

[0024] Compared with the existing methods, the present invention has at least the following technical effects or advantages:

[0025] 1. The present invention utilizes the chemical characteristics of the foaming agent and the foam stabilizer to remove most of the coke powder and dust during the coke transportation process on the belt system. In addition, the dual effects of the foaming agent and the stabilizer also have a positive effect on the cold strength of the coke.

[0026] 2. The traditional dry mist dust suppression method such as water spraying is only effective for short distances or current belts. Since the temperature of dry coke quenching and coke discharge is relatively high, the water sprayed on the coke for dust reduction evaporates quickly, and the dust in the subsequent transportation process is almost zero. The present invention forms a tiny protective film on the surface of the coke based on the film-forming principle, and seals the dust in the protective film formed on the surface of the coke, preventing dust from being raised again due to being dropped or fallen in subsequent transportation.

[0027] In summary, the advantages of the air film spray dust reduction method of the present invention for coke transportation dust removal are: ① the coke dust is dropped back onto the coke transport belt through spraying; ② a tiny protective film is formed on the surface of the coke; ③ the dust is sealed in the protective film formed on the surface of the coke; ④ dust is prevented from being raised again due to being dropped or fallen in subsequent transportation; ⑤ the original spray system process is not changed, and the operating cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the industrialization flow chart of the present invention. DETAILED DESCRIPTION

[0029] The present invention discloses an air film spray agent and a method for using the same. Those skilled in the art can refer to the contents of this article and appropriately improve the process parameters to achieve the same. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0030] An air film spray agent and a method for using the same are used to intervene from a chute outlet to solve the dust problem during the transportation of coke from a dry quenching coke tank to a coke transport belt during multiple continuous coke transport belts, thereby effectively reducing the dust pollution problem during the transportation of coke.

[0031] The specific steps include:

[0032] 1. Prepare an air film spray agent, which is composed of a high-viscosity liquid foaming agent A and a foam stabilizer liquid B. The air film spray agent is prepared by mixing agent A and agent B in a volume ratio of 100: (5-25), and then mixing them evenly with water to prepare an aqueous solution C with a mass percentage concentration of 1-5%.

[0033] 2. The aqueous solution C prepared in step 1) is stored in a water reservoir of a spray system, and water is added to the water reservoir and stirred to form a dilute aqueous solution D with a mass percentage concentration of 0.5 to 1%.

[0034] 3. Spray the dilute aqueous solution D to the chute outlet of the coke transport belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to achieve the purpose of dust reduction.

[0035] 4. Spray the dilute aqueous solution D through the belt spray system at the chute outlet of the coke transport belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to achieve the purpose of isolating and reducing dust.

[0036] Preferably, in step 1), agent A and agent B are dissolved in water separately to prepare aqueous solutions of separate components, and then the single aqueous solutions are mixed with water to prepare a 1-5% aqueous solution C with a volume ratio of agent A to agent B of 100:(5-25).

[0037] Preferably, in step 1), agent A is an alkyl polysaccharide and agent B is an alkyl alcohol amide nonionic surfactant.

[0038] Preferably, in step 1), agent A is a hydrofluoroalkane and agent B is an alkyl alcohol amide.

[0039] Preferably, in step 1), the hydrofluoroalkane and the alkyl alcohol amide are uniformly mixed in a ratio of 100:(8-20) and then dissolved in water to prepare an aqueous solution C with a total mass percentage concentration of 3-5%.

[0040] Preferably, in step 1), the hydrofluoroalkane and the alkyl alcohol amide are uniformly mixed in a ratio of 100:10 and then dissolved in water to prepare an aqueous solution C with a total mass percentage concentration of 5%.

[0041] Preferably, in step 1), the hydrofluoroalkane and the alkyl alcohol amide are dissolved in water separately to prepare a 10% aqueous solution, and then the two are mixed to form an aqueous solution C with a mass percentage concentration of 5%.

[0042] Preferably, in step 2), the aqueous solution C is added to a spray reservoir of fixed volume, and then the reservoir is filled with water to obtain a fully uniform fusion to obtain a dilute aqueous solution D with a concentration of 0.5%.

[0043] Preferably, in step 3), the dilute aqueous solution D is sprayed to the chute outlet of the coke transport belt through a water pump.

[0044] Preferably, in step 4), agent D is sprayed onto the coke at the outlet of the CDQ coke discharge belt chute by a water pump, so that tiny particles raised from the coke surface are adsorbed onto the coke and a protective film is formed on the coke surface due to the high temperature of the coke, thereby achieving the purpose of isolating and reducing dust.

[0045] The compositions of the A and B agents referred to in the present invention are as follows:

[0046] Foaming agents are substances that make the target substance pore-forming. They can be divided into three categories: chemical foaming agents, physical foaming agents, and surfactants. Chemical foaming agents are compounds that can release gases such as carbon dioxide and nitrogen after heating and decomposition, and form pores in the polymer composition; physical foaming agents are compounds whose foam pores are formed by the change of the physical form of a certain substance, that is, by the expansion of compressed gas, the volatilization of liquid, or the dissolution of solid. Foaming agents have high surface activity, can effectively reduce the surface tension of liquids, and arrange double electron layers on the surface of the liquid film to surround the air to form bubbles, and then single bubbles form foam.

[0047] Foam stabilizers are substances that can improve the stability of bubbles and prolong the half-life of foam collapse. Foam stabilizers are substances that stabilize foam. Foam stabilizer products are pollution-free, easy to use (no need to soak), have strong wettability, and are used in small amounts [30 to 50 grams per cubic meter of aerated concrete. The overall cost is low, and it is an ideal special admixture for the production of high-quality aerated concrete. Dodecyl dimethylamine oxide and alkyl alcohol amide, the foam stabilization mechanism of this type of substance is to reduce the repulsive force of the anionic group of the liquid film anionic surfactant to achieve foam stabilization.

[0048] The advantages of the air film spray dust reduction method of the present invention for coke transportation dust removal are: 1. The coke dust is dropped back onto the coke transport belt through spraying; 2. A tiny protective film is formed on the surface of the coke; 3. The dust is sealed in the protective film formed on the surface of the coke; 4. Dust is prevented from being raised again due to being dropped or fallen in subsequent transportation; 5. The original spray system process is not changed, and the operating cost is low.

[0049] The present invention provides an air film spray agent and a method for using the same. By utilizing the chemical characteristics of a foaming agent and a foam stabilizer, most of the coke powder and dust can be removed during the transportation of coke in a belt system. In addition, the dual effects of the foaming agent and the stabilizer also have a positive effect on the cold strength of the coke.

[0050] Traditional dry mist dust suppression methods such as water spraying alone are only effective for short distances or current belts. Since the temperature of dry coke quenching and coke discharge is relatively high, the water sprayed on the coke for dust reduction evaporates quickly, and the dust during subsequent transportation is almost zero. The present invention forms a tiny protective film on the surface of the coke based on the film-forming principle, and seals the dust in the protective film formed on the surface of the coke, thereby preventing dust from being raised again due to being dropped or fallen during subsequent transportation.

[0051] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0052] Embodiment 1:

[0053] This embodiment provides an air film spray agent and a method for using the same, that is, a method for reducing dust on the coke surface by film formation under the combined action of a foaming agent and a stabilizer. Taking the coke conveyor belt as an example, the industrial process is as follows: Figure 1 As shown, the following steps are included:

[0054] 1. Foaming agent pretreatment:

[0055] The high-viscosity liquid foaming agent A (alkyl polyglycoside) is mixed with water to prepare an aqueous solution with a concentration of 10%.

[0056] 2. Foam stabilizer pretreatment:

[0057] The foam stabilizer B (alkyl alcohol amide) was mixed with water to prepare an aqueous solution with a concentration of 1%.

[0058] 3. Mixed modulation processing:

[0059] Dissolve 10% foaming agent A in water and 1% foam stabilizer B in water in a ratio of 1:1 and add water to make a 5% aqueous solution C (air film spraying agent);

[0060] 4. Preparation of dilute aqueous solution:

[0061] The 5% aqueous solution C is added to a water reservoir and mixed with water to form a 0.5% dilute aqueous solution;

[0062] 5. The dilute aqueous solution D is sprayed on the head of the CDQ coke discharge belt through the belt spraying system to reduce dust. The aqueous solution D acts on the high-temperature coke surface to form a thin film.

[0063] Embodiment 2: A mixture of 10% foaming agent A and 2% foam stabilizing agent B in a ratio of 1:1 is dissolved in water to prepare a 5% aqueous solution C (air film spraying agent), which is another embodiment of the present invention.

[0064] Embodiment 3: A mixture of 10% foaming agent A and 4% foam stabilizing agent B in a ratio of 1:1 is dissolved in water to prepare a 5% aqueous solution C (air film spraying agent), which is another embodiment of the present invention.

[0065] The present invention intervenes from the chute outlet to solve the dust problem during the transportation of coke from the dry quenching coke tank to the coke transport belt during multiple continuous coke transport belts, thereby effectively reducing the dust pollution problem of coke during the transportation process.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air film spray agent, characterized in that: It is composed of high viscosity liquid foaming agent A and foam stabilizing agent liquid B; The air film spray agent is prepared by mixing agent A and agent B in a volume ratio of 100:(5-25), and then mixing them evenly and adding water to prepare an aqueous solution with a mass percentage concentration of 1-5%.

2. An air film spray according to claim 1, characterized in that: The air film spray agent is prepared by dissolving agent A and agent B in water to prepare separate aqueous solutions, and then mixing the separate aqueous solutions with water to prepare a 1-5% aqueous solution with a volume ratio of agent A to agent B of 100:(5-25).

3. The air film spray agent according to claim 1, characterized in that: The agent A is an alkyl polysaccharide, and the agent B is an alkyl alcohol amide nonionic surfactant.

4. The air film spray agent according to claim 1, characterized in that: The agent A is a hydrofluoroalkane, and the agent B is an alkyl alcohol amide.

5. An air film spray agent according to claim 4, characterized in that: The air film spraying agent is prepared by mixing hydrofluoroalkane and alkyl alcohol amide in a ratio of 100: (8-20) and then dissolving them in water to prepare an aqueous solution with a total mass percentage concentration of 3-5%.

6. An air film spray agent according to claim 5, characterized in that: The air film spray agent is prepared by mixing hydrofluoroalkane and alkyl alcohol amide in a ratio of 100:10 and then dissolving them in water to prepare an aqueous solution with a total mass percentage concentration of 5%.

7. The air film spray agent according to claim 6, characterized in that: The air film spraying agent is prepared by dissolving hydrofluoroalkane and alkyl alcohol amide in water separately to prepare a 10% aqueous solution, and then mixing the two to form an aqueous solution with a mass percentage concentration of 5%.

8. The method for using an air film spray agent according to any one of claims 1 to 7, characterized in that: The specific steps include: 1) The air film spray agent is stored in a water reservoir of the spray system, and water is added to the water reservoir and stirred to form a dilute aqueous solution D with a mass percentage concentration of 0.5 to 1%; 2) Spray the dilute aqueous solution D to the chute outlet of the coke conveyor belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to reduce dust; 3) The dilute aqueous solution D is sprayed through the belt spray system at the chute outlet of the coke transport belt, so that the tiny particles raised from the coke surface are adsorbed onto the coke and a protective film of tiny units is formed on the coke surface to isolate dust.

9. The method for using an air film spray agent according to claim 8, characterized in that: In the step 1), the mass percentage concentration of the dilute aqueous solution D is 0.5%.

10. The method for using an air film spray agent according to claim 8, characterized in that: In the step 2), the dilute aqueous solution D is sprayed to the chute outlet of the coke transport belt by a water pump; In the step 4), the dilute aqueous solution D is sprayed onto the coke at the outlet of the CDQ coke discharge belt chute by a water pump under pressure.

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