Composite dust suppressant for coke

Abstract

The invention relates to the technical field of dust suppressants, in particular to a composite dust suppressant for coke. Comprising the following components in percentage by weight: 0.9 to 1.5 parts of a crusting agent, 0.02 to 0.1 part of a penetrating agent, 0.02 to 0.1 part of alkyl glycoside serving as a surfactant, 0.02 to 0.1 part of an anti-settling agent, 0.05 to 0.2 part of propylene glycol serving as an anti-freezing agent, 0.02 to 0.1 part of palm polyol serving as a plasticizer, 0.02 to 0.1 part of a curing agent, 0.02 to 0.1 part of a light stabilizer and the balance of water. By compounding the special composite dust suppressant suitable for the coke and the petroleum coke, the dust suppressant can be used in a fog gun vehicle or a port goods yard spraying system, the surface tension of water is reduced, the permeability of the water in the coke and the petroleum coke is improved, meanwhile, the wettability of the surface of a coke and petroleum coke cargo stack is improved, finally, continuous crusting is formed on the surface of the cargo stack, and the dust suppression effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of dust suppressants, and in particular to a composite dust suppressant for coke. Background Art

[0002] Dust is an important factor causing particulate pollution in our cities, among which inhalable particles, called PM10 (IP), are an important indicator of air pollution, and the share of dust in cities reaches or even exceeds about 50%. Therefore, only by effectively suppressing dust can we ensure that the air quality of the environment meets the standards. With the rapid development of ports, the throughput of bulk dry bulk cargo is growing faster and faster, and there are more and more open-air storage yards such as ore sand storage yards, coal, coke, and petroleum coke storage yards, and the scale is getting larger and larger. The pollution problems caused by road dust, construction dust, and yard dust in port production are becoming more and more prominent.

[0003] The dust from the stockpiling in the port yard can be divided into static stockpile dust and dynamic dust during transportation and unloading. The yard covers a large area, has a high height, and a large surface area, which poses a safety hazard. The bulk particles in the yard are widely distributed (i.e., the particle size is uneven), and very fine particles are easily blown up by the wind into dust. The yard has a great pollution to the surrounding environment. The losses caused by the raised dust cannot be avoided and are difficult to capture and recycle, and there is a certain risk of economic loss. Coal is generally transported by open cars in railway transportation. During transportation, due to the bumps caused by the roadbed, turnouts and track facilities, coupled with various reasons such as wind force, the coal on the surface of the vehicle is scattered on the ground, which not only causes coal loss and coal dust pollution, but also the coal ash spilled on the equipment and electrical lines will bring serious safety accidents and hidden dangers to railway transportation. It can be seen that the cost of the loss is huge.

[0004] Commonly used dust prevention methods include water sprinkling, covering and chemical dust suppressants. The water sprinkling method has a short duration. When the water evaporates, the content of fine dust in the dust will increase dramatically. After the dust is controlled by water sprinkling, the recycled water will have a certain degree of influence on the increase in the concentration of dust particles. This not only requires a large workload, but also increases the difficulty of maintenance and management, and will cause a large amount of water resources to be wasted. In addition, the climate temperature has a greater impact on this method. The effect time in summer is too short, only a dozen minutes, and there will be icing problems in winter. Therefore, this method has many restrictions in practical application. The covering method uses dust-proof nets and dust-proof cloths to isolate and protect the storage cargo stacks. It is only suitable for stationary bulk materials in the yard. For work areas where new dust is constantly generated, this method has limited dust suppression capabilities. The materials of dust-proof nets and dust-proof cloths are mainly polyethylene (PE) or polyvinyl chloride (PVC), which are easy to age and break, and difficult to degrade, causing secondary pollution to the environment. In addition, the cargo stacks of coal, ore and other specialized yards in the port are as high as 17 meters, and the cargo turnover is fast. The use of dust-proof nets and dust-proof cloth for covering the stacks poses high safety risks to workers, high labor costs, and large loss of covering materials. Overall, the cost is relatively high.

[0005] There are many types of chemical dust suppressants on the market. The use process can be done manually, mechanically or by professional spraying stations and fixed spray systems. The dust suppressant dilution can be evenly sprayed on the material surface or dust-raising area to achieve the effect of dust prevention and dust reduction. The advantage of this method is that the raw materials themselves are non-corrosive, non-polluting, biodegradable and environmentally friendly. Since the surface solidifies into a shell, it has certain wind erosion and rain erosion resistance, which can effectively reduce and reduce material loss and protect the health of workers and surrounding people. However, there are many types of port cargo stacks. Ore and coal are highly compatible with dust suppressants and can be used for most dust suppressants. Coke and petroleum coke are light in weight, poorly compatible with water, and easy to collapse during the spraying process. Most dust suppressants cannot form continuous crusts on the surface of coke and petroleum coke cargo stacks to reduce dust. Summary of the invention

[0006] The purpose of the present invention is to provide a composite dust suppressant for coke in view of the above-mentioned deficiencies in the prior art in dust prevention and dust suppression of coke and petroleum coke bulk cargoes. By compounding a special composite dust suppressant suitable for coke and petroleum coke, the dust suppressant can be used with a fog cannon truck or a port cargo yard spray system to reduce the surface tension of water, increase the permeability of water in coke and petroleum coke, and at the same time increase the wettability of the surface of the coke and petroleum coke cargo stacks, and finally form a continuous crust on the surface of the cargo stack to achieve a dust suppression effect.

[0007] The technical solution of the present invention is as follows:

[0008] A composite dust suppressant for coke comprises the following components in percentage by weight: 0.9-1.5 parts of a crusting agent, 0.02-0.1 parts of a penetrant, 0.02-0.1 parts of a surfactant alkyl glycoside, 0.02-0.1 parts of an anti-precipitation agent, 0.05-0.2 parts of an antifreeze agent propylene glycol, 0.02-0.1 parts of a plasticizer palm polyol, 0.02-0.1 parts of a ripening agent, 0.02-0.1 parts of a light stabilizer, and the balance is water.

[0009] Preferably, the crusting agent comprises polyvinyl alcohol and hydroxypropyl starch; the polyvinyl alcohol is 0.50-1.00 parts, and the hydroxypropyl starch is 0.40-0.50 parts.

[0010] Preferably, the penetrant includes sodium dodecyl sulfonate or sodium isooctyl succinate diester sulfonate. Sodium isooctyl succinate diester sulfonate with low carbon number (carbon atoms ≤ 8) has low surface tension, which improves the wettability of the dust suppressant and the coke surface and increases the penetration of the dust suppressant.

[0011] Preferably, the anti-precipitation agent includes polymer bio-glucon, which is one or more natural plant gums, including xanthan gum and guar gum. The polymer bio-glucon can be selected from one or more natural plant gums such as xanthan gum and guar gum.

[0012] Preferably, the curing agent includes acryloyloxyethyl trimethyl ammonium chloride. The addition of acryloyloxyethyl trimethyl ammonium chloride reduces the film-forming time after the coke is sprayed with the dust suppressant, and increases the toughness of the crust and the dust suppression time.

[0013] Preferably, the light stabilizer includes salicylate, which absorbs free radical electrons, blocks photo-oxidative degradation, and increases the stability of the dust suppressant crust.

[0014] Preferably, the composite dust suppressant comprises the following components in weight percentage: 0.50-1.00 parts of polyvinyl alcohol, 0.40-0.50 parts of hydroxypropyl starch, 0.02-0.1 parts of sodium dodecyl sulfate, 0.02-0.1 parts of alkyl glycoside, 0.02-0.1 parts of high molecular bio-gum, 0.05-0.2 parts of propylene glycol, 0.02-0.1 parts of palm polyol, 0.02-0.1 parts of acryloyloxyethyltrimethylammonium chloride, 0.02-0.1 parts of salicylate, and 98.35-99.02 parts of water.

[0015] Preferably, the composite dust suppressant comprises the following components in weight percentage: 0.50-1.00 parts of polyvinyl alcohol, 0.40-0.50 parts of hydroxypropyl starch, 0.02-0.1 parts of sodium isooctyl succinate diester sulfonate, 0.02-0.1 parts of alkyl glycoside, 0.02-0.1 parts of high molecular bio-gum, 0.05-0.2 parts of propylene glycol, 0.02-0.1 parts of palm polyol, 0.02-0.1 parts of acryloyloxyethyl trimethyl ammonium chloride, 0.02-0.1 parts of salicylate, and 97.7-98.93 parts of water.

[0016] Beneficial effects of the present invention:

[0017] The invention is novel and reasonable in design, convenient and effective in use, has good wettability, adhesion and dispersibility, has a wide range of economical and environmentally friendly raw materials, does not produce any harmful gas, is non-toxic and tasteless, and is easy to construct. The dust suppression effect on coke and petroleum coke cargo piles is better than the prior art. The cross-linked molecules in the polymer formed by the invention form a network structure, and there are various ion groups between the molecules. Due to the large charge density, a strong affinity is generated between the ions, and the particulate dust can be quickly captured and firmly adsorbed through coagulation, adhesion and other effects. After drying, it can solidify into a film on the dust surface, so it has a strong dust suppression and dust prevention effect.

[0018] The product of this application is sprayed in the coke or petroleum coke pile. After the surface of the material pile is air-dried, a shell is formed by the dust suppressant and penetrates into the surface of the coke or petroleum coke pile, forming a durable and strong outer shell with adhesive properties, which reduces corrosion caused by wind and rain, effectively inhibits dust dissipation and reduces the degree of aging of the material, and inhibits oxygen penetration to slow down the oxidation rate, reduce deep oxidation and loss of the material pile, and help maintain the quality of inventory.

[0019] The dust suppressant of the present invention can effectively suppress dust and impurities on the surface of coke, thereby improving the quality and thermal stability of coke. The components of the composite dust suppressant for coke and petroleum coke proposed by the present invention are all water-soluble substances. Before implementation, the components of the dust suppressant can be stored independently according to the components, or can be prepared into solutions according to the proportions for storage; during implementation, water is used as a solvent to prepare a solution of corresponding proportions at room temperature. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0021] Example 1

[0022] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.75 parts of polyvinyl alcohol, 0.45 parts of hydroxypropyl starch, 0.06 parts of sodium dodecyl sulfate, 0.06 parts of alkyl glycoside, 0.06 parts of high molecular bio-gum, 0.13 parts of propylene glycol, 0.06 parts of palm polyol, 0.06 parts of acryloyloxyethyl trimethylammonium chloride, 0.06 parts of salicylate and 98.31 parts of water.

[0023] Example 2

[0024] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.50 parts of polyvinyl alcohol, 0.40 parts of hydroxypropyl starch, 0.02 parts of sodium dodecyl sulfate, 0.02 parts of alkyl glycoside, 0.02 parts of high molecular bio-gum, 0.05 parts of propylene glycol, 0.02 parts of palm polyol, 0.02 parts of acryloyloxyethyl trimethylammonium chloride, 0.02 parts of salicylate and 98.93 parts of water.

[0025] Example 3

[0026] A composite dust suppressant for coke, comprising the following components in percentage by weight: 1.00 part of polyvinyl alcohol, 0.50 part of hydroxypropyl starch, 0.1 part of sodium dodecyl sulfate, 0.1 part of alkyl glycoside, 0.1 part of high molecular bio-gum, 0.2 part of propylene glycol, 0.1 part of palm polyol, 0.1 part of acryloyloxyethyl trimethyl ammonium chloride, 0.1 part of salicylate and 97.7 parts of water.

[0027] Example 4

[0028] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.7 parts of polyvinyl alcohol, 0.43 parts of hydroxypropyl starch, 0.04 parts of sodium dodecyl sulfate, 0.04 parts of alkyl glycoside, 0.04 parts of high molecular bio-gum, 0.1 parts of propylene glycol, 0.04 parts of palm polyol, 0.04 parts of acryloyloxyethyl trimethylammonium chloride, 0.04 parts of salicylate and 98.53 parts of water.

[0029] Example 5

[0030] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.75 parts of polyvinyl alcohol, 0.45 parts of hydroxypropyl starch, 0.06 parts of sodium isooctyl succinate diester sulfonate, 0.06 parts of alkyl glycoside, 0.06 parts of high molecular bio-gum, 0.13 parts of propylene glycol, 0.06 parts of palm polyol, 0.06 parts of acryloyloxyethyl trimethylammonium chloride, 0.06 parts of salicylate and 98.31 parts of water.

[0031] Example 6

[0032] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.50 parts of polyvinyl alcohol, 0.40 parts of hydroxypropyl starch, 0.02 parts of sodium isooctyl succinate diester sulfonate, 0.02 parts of alkyl glycoside, 0.02 parts of high molecular bio-gum, 0.05 parts of propylene glycol, 0.02 parts of palm polyol, 0.02 parts of acryloyloxyethyl trimethyl ammonium chloride, 0.02 parts of salicylate, and 98.93 parts of water.

[0033] Example 7

[0034] A composite dust suppressant for coke, comprising the following components in percentage by weight: 1.00 part of polyvinyl alcohol, 0.50 part of hydroxypropyl starch, 0.1 part of sodium isooctyl succinate diester sulfonate, 0.1 part of alkyl glycoside, 0.1 part of high molecular bio-gum, 0.2 part of propylene glycol, 0.1 part of palm polyol, 0.1 part of acryloyloxyethyl trimethyl ammonium chloride, 0.1 part of salicylate, and 97.7 parts of water.

[0035] Example 8

[0036] A composite dust suppressant for coke, comprising the following components in percentage by weight: 0.7 parts of polyvinyl alcohol, 0.43 parts of hydroxypropyl starch, 0.04 parts of sodium isooctyl succinate diester sulfonate, 0.04 parts of alkyl glycoside, 0.04 parts of high molecular bio-gum, 0.1 parts of propylene glycol, 0.04 parts of palm polyol, 0.04 parts of acryloyloxyethyl trimethylammonium chloride, 0.04 parts of salicylate, and 98.53 parts of water.

[0037] The dust suppressant of the present invention is very compatible with water and easily forms water-enclosed powder and agglomerates when mixed with water. It is difficult to form an aqueous solution without sufficient stirring. The dust suppressant powder has poor fluidity during feeding, and the angle of repose of the powder is greater than 800, which causes the material to easily form a bridge arch during feeding, and the material itself is difficult to break the arch.

[0038] The preparation method of the composite dust suppressant for coke comprises the following steps:

[0039] (1) Prepare the components according to the weight ratio, and pack the components individually or in mixed form and wait for mixing;

[0040] (2) Add the components of the dust suppressant into a mixer and mix them. Add water to the mixture and set the rotation speed of the mixer to a minimum of 960 r / min to enhance mixing;

[0041] (3) introducing the dust suppressant solution obtained in step (2) into a centrifugal water pump, wherein the centrifugal water pump can be used to stir the mixed solution for a second time, thereby achieving a deepening stirring effect and making the mixing of the aqueous solution more uniform;

[0042] (4) The aqueous solution discharged by the centrifugal water pump in step (3) is introduced into an elastic screw feeder, and then discharged for use.

[0043] In order to make the dust suppressant powder better mixed in the aqueous solution, the powder can form a uniform aqueous solution after stirring, avoiding the formation of agglomerates to block the nozzle, bringing convenience to on-site spraying and reducing the subsequent dust suppression use costs.

[0044] The repose angle of the powder is greater than 800, which makes it easy for the material to form a bridge arch when feeding. The use of an elastic screw feeder overcomes the problem that the dust suppressant powder is not easy to flow during feeding. The elastic screw feeder will generate a certain amount of vibration during operation, and the vibration can effectively break the arch when feeding the powder, allowing the powder material to be fed smoothly.

[0045] Performance Test:

[0046] After the composition of Example 5 of the present application was mixed with water at a ratio of 1:99 (weight ratio), the performance measured according to the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" was as follows:

[0047]

[0048] All performance parameters in Example 5 meet the standards and have significant performance advantages, and can effectively suppress dust and impurities on the surface of coke, thereby improving the quality and thermal stability of coke. This application has significant effects and progress compared to the prior art.

Claims

1. A composite dust suppressant for coke, comprising the following components in weight percentage: 0.9-1.5 parts of a crusting agent, 0.02-0.1 parts of a penetrant, 0.02-0.1 parts of a surfactant alkyl glycoside, 0.02-0.1 parts of an anti-precipitation agent, 0.05-0.2 parts of an antifreeze agent propylene glycol, 0.02-0.1 parts of a plasticizer palm polyol, 0.02-0.1 parts of a ripening agent, 0.02-0.1 parts of a light stabilizer, and the balance being water.

2. The composite dust suppressant for coke according to claim 1, characterized in that: The crusting agent comprises polyvinyl alcohol and hydroxypropyl starch; the polyvinyl alcohol is 0.50-1.00 parts, and the hydroxypropyl starch is 0.40-0.50 parts.

3. The composite dust suppressant for coke according to claim 1, characterized in that: The penetrant includes sodium dodecyl sulfate or sodium isooctyl succinate diester sulfonate.

4. The composite dust suppressant for coke according to claim 1, characterized in that: The anti-precipitation agent includes polymer bio-gum, which is one or more natural plant gums, and includes xanthan gum and guar gum.

5. The composite dust suppressant for coke according to claim 1, characterized in that: The curing agent includes acryloyloxyethyltrimethylammonium chloride.

6. The composite dust suppressant for coke according to claim 1, characterized in that: The light stabilizer includes salicylate.

7. The composite dust suppressant for coke according to claim 1, characterized in that: The composite dust suppressant comprises the following components in weight percentage: 0.50-1.00 parts of polyvinyl alcohol, 0.40-0.50 parts of hydroxypropyl starch, 0.02-0.1 parts of sodium dodecyl sulfate, 0.02-0.1 parts of alkyl glycoside, 0.02-0.1 parts of high molecular bio-gum, 0.05-0.2 parts of propylene glycol, 0.02-0.1 parts of palm polyol, 0.02-0.1 parts of acryloyloxyethyl trimethyl ammonium chloride, 0.02-0.1 parts of salicylate and 98.35-99.02 parts of water.

8. The composite dust suppressant for coke according to claim 1, characterized in that: The composite dust suppressant comprises the following components in percentage by weight: 0.50-1.00 parts of polyvinyl alcohol, 0.40-0.50 parts of hydroxypropyl starch, 0.02-0.1 parts of sodium isooctyl succinate diester sulfonate, 0.02-0.1 parts of alkyl glycoside, 0.02-0.1 parts of high molecular bio-gum, 0.05-0.2 parts of propylene glycol, 0.02-0.1 parts of palm polyol, 0.02-0.1 parts of acryloyloxyethyl trimethyl ammonium chloride, 0.02-0.1 parts of salicylate and 97.7-98.93 parts of water.

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