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Manufacturing method for steel rotational moulding storage tank with modified polypropylene inside liner

A manufacturing method and inner lining technology, applied in the manufacturing field of rotomolded storage tanks, can solve the problems of incapable of one-time rotomolding, limited application range, low melt index, etc., and achieve good compactness, strong integrity, and mechanical properties high effect

Active Publication Date: 2014-07-23
江苏兆辉防腐科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melt index is low, and it cannot be rotationally molded at one time, that is, the existing polypropylene storage tanks are all welded and formed, not only have weld seams, but also cannot withstand negative pressure
[0003] As we all know, the contribution of polypropylene plastic in the field of anti-corrosion is beyond reproach, but its weather resistance, bending resistance and other weaknesses have always limited its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 16m 3 Steel lined toughened grade polypropylene PP sulfuric acid horizontal storage tank

[0026] Technical indicators:

[0027] A. Equipment volume 16m 3 ,￠2216×3800

[0028] B. Design pressure -0.98Mpa

[0029] C. Design temperature 95℃

[0030] D. Lined with polypropylene PP resin, thickness: 10mm~12mm, lining area 37m 2 ;

[0031] E. Shell material Q235B thickness 8mm

[0032] F. See drawings for manholes and nozzles

[0033] Purchase: purchase Q235B steel plate, 20# seamless fluid pipe, flange of HG20593-97 standard.

[0034] Head: Two heads with a lower outer diameter of ￠2216, and then stamped and formed for use.

[0035] Barrel body: a steel plate with a lower outer diameter of ￠2216 and a length of 3800 is rolled into a cylinder by a plate rolling machine for use.

[0036] Welding: welded into the tank body according to the drawing requirements.

[0037] Hole opening: according to the drawings, open manholes, feed inlets, discharge outlets, liquid le...

Embodiment 2

[0056] 30m 3 Steel lined toughened grade polypropylene PP pigment mixing tank

[0057] Technical indicators:

[0058] A. Equipment volume 16m 3 ,￠3200×4050

[0059] B. Design pressure: PN1.6

[0060] C. Design temperature 95℃

[0061] D. Lined with polypropylene PP resin, thickness: 12mm~14mm, lining area 57m 2

[0062]E. Shell material Q235B thickness 12mm

[0063] F. See drawings for manholes and nozzles

[0064] Purchase: Purchase Q235B steel plate, 20# seamless fluid pipe, HG20593-97 standard flange, ￠150 45# round steel for use.

[0065] Motor: Purchased parts (finished products)

[0066] Motor base: purchased parts (finished products)

[0067] Head: One head with a lower outer diameter of ￠3200, and then stamped and formed for use.

[0068] Barrel body: A steel plate with a lower outer diameter of ￠3200 and a length of 3200 is rolled into a cylinder by a plate rolling machine for use.

[0069] Bottom plate: a circular plate with a lower outer diameter of ￠320...

Embodiment 3

[0093] 20m 3 Steel lined toughened grade polypropylene PP hydrochloric acid vertical storage tank

[0094] Technical indicators:

[0095] A. Equipment volume 20m 3 ,￠2600×3200

[0096] B. Design pressure: PN1.0

[0097] C. Design temperature 95℃

[0098] D. Lined with polypropylene PP resin, thickness: 10mm~12mm, lining area 42m 2

[0099] E. Shell material Q235B thickness 8mm

[0100] F. See drawings for manholes and nozzles

[0101] Purchase: purchase Q235B steel plate, 20# seamless fluid pipe, flange of HG20593-97 standard.

[0102] Head: One head with a lower outer diameter of ￠2600, and then stamped and formed for use.

[0103] Barrel body: A steel plate with a lower outer diameter of ￠2600 and a length of 3200 is rolled into a cylinder by a plate rolling machine for use.

[0104] Bottom plate: a circular plate with a lower outer diameter of ￠2600 for use.

[0105] Welding: welded into the tank body according to the drawing requirements.

[0106] Hole opening:...

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PUM

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Abstract

The invention relates to a manufacturing method for a steel rotational moulding storage tank with a modified polypropylene inside liner. The method comprises the following steps: welding, tapping, polishing, welding a wire mesh, arranging a rolling ring, adding modified polypropylene powder, heating and autorotating, rocking and autorotating, cooling, offloading, removing the rolling ring, trimming and the like. In the invention, the storage tank obtained by the method exactly overcomes the shortcomings of the prior art, the steel rotational moulding storage tank with the modified polypropylene inside liner has not only the strength of steel but also the corrosion resistance of polypropylene plastic, and the inside liner of the steel rotational moulding storage tank has obvious characteristics of good compactness, high mechanical property, high integrity, no joint, no welding line, uniform thickness, high temperature and low temperature resistance, negative pressure resistance, strong adhesion, corrosion resistance, impact resistance, no toxicity, easy maintenance and the like.

Description

technical field [0001] The invention relates to the technical field of storage tank manufacturing, in particular to a method for manufacturing a rotationally molded storage tank with a modified polypropylene inner liner. Background technique [0002] Corrosion has always been one of the most troublesome hazards of chemical equipment. A little carelessness can damage the equipment, cause accidents or even disasters. According to relevant statistics, about 60% of the damage of chemical equipment is caused by corrosion. Polypropylene has good chemical stability and is insoluble in common solvents at room temperature. It is almost stable except for high concentrations of sulfuric acid, nitric acid, aqua regia, tetrahydrofuran and tetrachloroethane, and is resistant to alkali. Polypropylene products have a smooth surface, excellent wear resistance, and low air permeability and water permeability. Polypropylene has high mechanical properties, and its yield strength, tensile stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D85/84B65D23/02
Inventor 张琼
Owner 江苏兆辉防腐科技有限公司
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