Ecological briquette surface curing agent and its preparing method

A surface-cured, ecological technology, applied in chemical instruments and methods, other chemical processes, transportation objects, etc., can solve problems such as traffic safety threats, deterioration of the working environment of flight attendants, deterioration of the environment of employees and passengers, and achieve huge economic and social benefits. benefit, reduce flying losses along the way, and reduce the effect of human and material resources

Inactive Publication Date: 2007-03-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And it also produces serious pollution to the body of other vehicles passing by.
Secondly, it has a great impact on the equipment
Coal dust has seriously polluted the track bed of railway lines, aggravating the degree of compaction. In heavily polluted sections, coal dust has buried fasteners, sleeper plates and other parts, which has brought considerable difficulties to the daily maintenance of the engineering department. Serious corrosion on rails and fasteners, causing safety hazards
Due to the pollution of coal dust, the daily maintenance of signal communication equipment is very difficult
It often causes short circuit and discharge of power supply insulators, which shortens the service life and brings great inconvenience to daily maintenance operations
Third, it poses a threat to driving safety
The thickness of coal particles increases at a rate of about 20cm per month at the entrance of the tunnel. The concentration of coal dust in the tunnel is suffocating, and the visibility is less than 10m. The temperature of the working environment of the electrical equipment in the

Method used

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  • Ecological briquette surface curing agent and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material ratio:

[0026] Raw material name Proportion (weight %) Raw material name Proportion (weight %)

[0027] Polyvinyl alcohol 1 Sodium hypochlorite 0.6

[0028] Corn starch 5 Sodium thiosulfate 0.08

[0029] Copper sulfate 0.01 Borax 0.05

[0030] Caustic soda 0.6 Water 92.5

[0031] Preparation:

[0032] The first step, graft modification

[0033] According to the process flow chart in Figure 1, add 55% of the total water in the raw material ratio to the reactor, then add 1% polyvinyl alcohol, stir, heat up to 95°C to completely dissolve the polyvinyl alcohol, then cool down to 60°C, Add 5% cornstarch, stir and keep warm for 1h to carry out graft modification;

[0034] The second step, catalytic oxidation

[0035] After modification, cool the material to 25°C, add 0.01% copper sulfate to the reaction kettle, then add one-sixth of the total caustic soda, stir evenly, then add 10% sodium hypochlorite (0.4-0.8%) solution, catalytic oxidation Reaction 1h....

Embodiment 2

[0041] Raw material ratio:

[0042] Raw material name Proportion (weight %) Raw material name Proportion (weight %)

[0043] Polyvinyl alcohol 1.5 Sodium hypochlorite 0.8

[0044] Corn starch 6 Sodium thiosulfate 0.1

[0045] Copper sulfate 0.01 Borax 0.06

[0046] Caustic soda 0.6 Water 94.5

[0047] Preparation:

[0048] According to the ratio of raw materials in Example 2, the specific preparation steps are the same as in Example 1, but the heating temperature of graft modification is 99°C, and then the temperature is lowered to 50°C.

Embodiment 3

[0050] Raw material ratio:

[0051] Raw material name Proportion (weight %) Raw material name Proportion (weight %)

[0052] Polyvinyl alcohol 0.5 Sodium hypochlorite 0.4

[0053] Corn starch 4 Sodium thiosulfate 0.06

[0054] Copper sulfate 0.005 Borax 0.03

[0055] Caustic soda 0.4 Water 90.5

[0056] Preparation:

[0057] According to the ratio of raw materials in Example 3, the specific preparation steps are the same as in Example 1, but the heating temperature of graft modification is 97°C, and then the temperature is lowered to 55°C.

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Abstract

The invention relates to ecotype coal surface curing agent and the preparing method. It includes the following steps: using polyvinyl alcohol, corn starch as basic material, and water as solvent; grafting modification for the polyvinyl alcohol, corn starch; adding catalyst and oxidant to produce oxidized starch; adding caustic soda to gelatinize; adding water to dilute; adding stabilizer and cross-linking agent to prepare other component. It has the features of nontoxic, tasteless, satisfying environmental protection demand, strong coal cohesive force, wide material sources, economic, practical, and huge economic and social benefits for coal railway transportation.

Description

technical field [0001] The invention relates to an ecological briquette surface curing agent and a preparation method thereof. The curing agent is mainly used for railway coal transportation to prevent coal loss and environmental pollution during transportation. Background technique [0002] At this stage, China's coal is generally transported by open car in railway transportation. During the transportation process, due to the bumps caused by the roadbed, turnouts and rail facilities, coupled with the wind force, especially when the train enters the tunnel, due to the "piston wind" effect, it will form an instant strong disturbance air flow, and the fine coal powder on the surface will The particles are blown away from the vehicle body, fall onto the road surface, and then be rolled by subsequent vehicles to form secondary dust with smaller particle size and higher concentration. As a result, the coal dust on the surface of the coal seam in the vehicle is scattered, resulti...

Claims

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Application Information

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IPC IPC(8): C09K3/22B60P7/00
Inventor 朱红周长胜李伟崔波申闫春王芳辉
Owner BEIJING JIAOTONG UNIV
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