CN1327875A

CN1327875A - Process for preparing composite structure member with fluorine liner for chemical equipment

Info

Publication number: CN1327875A
Application number: CN00108491A
Authority: CN
Inventors: 董秀峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-13
Filing date: 2000-06-13
Publication date: 2001-12-26
Anticipated expiration: 2020-06-13
Also published as: CN1131097C

Abstract

A technology for manufacturing the compound structure of fluorine liner in chemical equipment inclues such steps as making fluorine linear, washing the inner surface of metal member for chemical equipment by organic solvent to remove oil dirt and rust, coating sodium on external surface of said liner, coating fluoride binder, assembling them together and pressurizing by filling air for compounding them together. Its advantages are low cost and long service life.

Description

The manufacture method of composite structure member with fluorine liner for chemical equipment

The present invention relates to the material combination process.Specifically a kind of manufacture method of container inside lining polytetrafluoroethylene (PTFE) clad steel member.

In the background technology, adopt polytetrafluoroethylmaterial material as industrialization construction equipment or container inside lining, get its excellent corrosion resisting performance, popular to people deeply, but it belongs to thermoplastic, and itself withstand voltage properties is poor, the coefficient of expansion is big, has cold flow sex change energy, the tool temperature span is big, so need its creep of control.

At present popular in the world, be the anticorrosion container equipment of lining with the polytetrafluoroethylene (PTFE), comprise tower, retort, reactor, can only rely on the heavy wall of itself to support, utilization be the structural strength of lining itself, belong to by the lining but not compound, so its lining is easy to generate distortion and damages, its thermal conductivity is also relatively poor, can influence operating efficiency, and is more harsh in the next service condition of the working condition that negative pressure is arranged, life-span is shorter, changes because of stopping work frequently to cause cost high.The fluorine material of the nonmetal character that is that lining uses of tracing it to its cause, with combine between the metal material as housing bad, and the complex technique that its stickup is adhered to another directly be a pendent technology difficult problem.

Company of Germany five moral companies, U.S. Du group, Daikin company, Britain foretell this class formation device product that inside door company produces a few days ago and use through domestic manufacturer such as Beijing chemical inc, Beijing Yanshan Petrochemical Company, the safe happy chemical Co., Ltd in Lianyun Harbour, Shandong chlor-alkali plant, Xianning pharmaceutical factory, Taizhou electrochemical factory, its service life is many between 10-100 days, every part price is that 5-80 does not wait for ten thousand yuan, and production cost is considerable.

The objective of the invention is to propose a kind of manufacture method of composite structure member with fluorine liner for chemical equipment, be intended to solve a combined process difficult problem that exists between fluorine material and metallic material components.

Task of the present invention is finished in the following manner:

The manufacture method of this composite structure member with fluorine liner for chemical equipment is characterized in that it comprises following process steps:

1), presses the equipment cavity shape and make teflon lined member, assembly;

2), mating surface preliminary treatment: the inner surface that hardware need serve as a contrast multiple position cleans up with organic solvent, removes degreasing and rusty stain; The outer surface of teflon lined member is put earlier sodium on the skin and is handled, and all is coated with the fluoride bond then;

3), be assembled into composite component;

4), composite component is dressed up hermetically sealed container, inflation pressurization then, and under the temperature and pressure condition of safety, keep 1 or more than one hour, the lining member is attached on the internal chamber wall that is fixed on hardware tightly.

In the said inflation pressurization steps, adopt water heating steam and compressed air to mix the method for pressurization.

In the said inflation pressurization steps, mixed pressure pressure is 1Mpa in its chamber.

Industrialization construction equipment goods of the present invention comprise reaction tower, retort, reactor, between-40 ℃～+ 180 ℃, test 600 repeatedly under the positive negative pressure state of maintenance-0.1MPa～1.6Mpa surplus time, the result do not see the distortion and delamination.Its shear strength reaches 16Mpa, peel strength (maximum peel value)＞30N/cm.Materials are obviously saved than conventional method.In addition, calculate, can prolong 30～40 times of working lives by result of the test.This method also is applicable to the fluoride corrosion-proof lining construction of making wide shape of the mouth as one speaks container.

Further specify below in conjunction with embodiment and accompanying drawing:

Fig. 1 is the process implementing illustration intention of vertical reaction tower of the present invention.

Fig. 2 is the process implementing illustration intention of horizontal reacting jar of the present invention.

Embodiment 1:

Referring to shown in Figure 1, this example is organized process implementing by the integral installation mode.This reaction tower is a post jar shape, be divided into three parts, be equipped with end socket up and down, this end socket is various informative, majority is dish or elliposoidal end socket, the centre is the tank body section, is combined into reaction tower, and internal layer is the lining member 1 of polytetrafluoroethylene (PTFE), serve as a contrast on the inwall of the steel member 2 that leans against metal, on upper cover 3, be provided with test interface 4, gas (pump) the pipe access port 6 of charging aperture 5 and temperature, pressure, low head 8 is provided with discharging opening 9.The charging aperture of upper cover 3 covers and also establishes electrical heating power supply access contact.Among the diagram, in the middle of charging aperture, hanging a heating apparatus 7 from above, insert in the water, be used for the water that heating is stored up, make it to produce water vapour, flash to steam expansion by its water, increase cavity pressure, add the Compressed Gas that enters from the air pumping pipe access port together, the parietal layer of polytetrafluoroethylene (PTFE) lining member is pressed to the parietal layer of hardware, make it compound under pressure.Above-mentioned heating apparatus also can be combined into one with independent water container, inserts in the lump then.

Its concrete technological process is as follows:

→ make corresponding teflon lined member 1 according to the steel member body structure inner chamber wall position and the shape (comprising cylinder inboard wall, end socket inwall, feed inlet and outlet and test interface position) of chemical industry equipment

→ lining external surface of structural member is put sodium on the skin and is handled

→ all be coated with fluoride bond (the G-2 type adhesive that this example selects Chenguang Chemical Inst., Ministry of Chemical Industry to produce)

Steel member 2 inner surfaces of → metal clean up with organic solvent

→ assembling assembling is with pack into the correspondence position of steel member 2 of polytetrafluoroethylene (PTFE) lining member 1, earlier with lower end end socket bolt tightening

→ an amount of the vaporization of adding water (should prevent dry combustion method) in cavity

→ settle electric heater, and insert in the water

→ again with upper end end socket bolt tightening, make it become the sealing cavity

Each test port of → sealing and charging aperture

→ connection Compressed Gas tracheae

→ energising heating vaporization, control heat time heating time and cavity pressure make cavity temperature reach 300 ℃, and pressure reaches 1Mpa, and keeps 120 minutes, is allowed to condition under the pressure in the air-tight chamber to make polytetrafluoroethylene (PTFE) lining member mutually compound with the steel member

→ cooling

→ finish.

Embodiment 2:

This example corresponds to horizontal tank body structure shown in Figure 2.According to the technical process identical, according to the corresponding polytetrafluoroethylene (PTFE) lining of the steel member body structure fabrication member of container with Fig. 1 embodiment; The lining external surface of structural member is put sodium on the skin, all is coated with the fluoride bond; Steel member 2 inner surfaces at metal clean with organic solvent-acetone; Assembling assembling then with pack into the correspondence position of steel member 2 of polytetrafluoroethylene (PTFE) lining member 1, adds a small amount of vaporization water in cavity; Settle electric heater,, make member constitute the cavity that can seal, add water, connect Compressed Gas tracheae inflation pressurization afterwards again with the pressurizing vessel sealing with bolt tightening two ends end socket; Simultaneously, the energising heating makes water vapor, 200 ℃ of control heating-up temperatures, and cavity pressure is 1.2Mpa, and keeps 120 minutes, is allowed to condition under the pressure in the inflating cells to make polytetrafluoroethylene (PTFE) lining member mutually compound with the steel member; It after the cooling complete operation.Wherein heating and temperature control promptly is starkly lower than the fluoride melting temperature within the fluoride safe temperature, and preferred 200-300 ℃, the pressure in the chamber is controlled in principle the also degree of being with safety, selects between the 0.8-1.5Mpa usually.Retention time allows to change to some extent equally, but should be controlled at more than 1 hour, preferred 2 hours.

The compound of above-mentioned lining member and steel member can be by the assembling construction of complete machine state, or constructs in that special sealing for pressure vessels is indoor by minute removable member mode.

Claims

1, a kind of manufacture method of composite structure member with fluorine liner for chemical equipment is characterized in that it comprises following process steps:

1), presses the equipment cavity shape and make teflon lined member, assembly;

2), mating surface preliminary treatment: the inner surface that hardware need serve as a contrast multiple polytetrafluoroethylene (PTFE) member position cleans up with organic solvent, removes degreasing and rusty stain; The outer surface of teflon lined member is put earlier sodium on the skin and is handled, and all is coated with the fluoride bond then;

3), be assembled into composite component;

4), composite component is dressed up hermetically sealed container, inflation pressurization then, and under the temperature of safety and middle pressure condition, keep 1 or more than one hour, the lining member is attached on the internal chamber wall that is fixed on hardware tightly.

2, the manufacture method of composite structure member with fluorine liner for chemical equipment as claimed in claim 1 is characterized in that in the said airtight pressurization composite steps, adopts water heating steam and compressed air to mix the method for pressurization.

3, the manufacture method of composite structure member with fluorine liner for chemical equipment as claimed in claim 1 is characterized in that mixed pressure pressure is 1Mpa in its chamber in the said airtight pressurization composite steps.