CN202152284U - Composite anticorrosive Venturi tower - Google Patents
Composite anticorrosive Venturi tower Download PDFInfo
- Publication number
- CN202152284U CN202152284U CN2011202751897U CN201120275189U CN202152284U CN 202152284 U CN202152284 U CN 202152284U CN 2011202751897 U CN2011202751897 U CN 2011202751897U CN 201120275189 U CN201120275189 U CN 201120275189U CN 202152284 U CN202152284 U CN 202152284U
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- silicon carbide
- stereotype
- tower
- carbide ceramics
- corrosive
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Abstract
The utility model relates to a composite anticorrosive Venturi tower used for production of titanium dioxide by a sulfuric acid method. The composite anticorrosive Venturi tower is characterized in that a whole tower body consists of a plurality of cylinder body sections, a layer of lead plate (2) is lined in an outer steel shell (1) of each cylinder body section, and a layer of silicon carbide ceramic (3) is lined in the lead plate again; and a gap (4) is arranged between the lead plate and the silicon carbide ceramic, and a layer of thermal insulation material (5) is filled in the gap. The utility model has the advantages that an anticorrosive and protective layer can resist acid, water and thermal shock, is not easy to broke and leak and has a largely prolonged service life.
Description
Technical field
The utility model belongs to chemical plant, especially adopts the venturi tower device structure technical field of Titanium White Production By Sulfuric Acid Process.
Background technology
At present, the venturi tower that sulfuric acid method titanium pigment production is used, its traditional corrosionproof protection frame mode are to adopt to ward off lead as resist.This structural requirement is warded off plumbous quality and must be got well, and can not leave any little pore, otherwise acid solution will be corroded box hat by the infiltrate lead layer; Simultaneously, require the to cut off the water high temperature impact of generation is as far as possible little to the melting loss of lead layer.But the startup of reserved cooling system always needs the time, thereby, 450 ℃ high temperature impact is even if the time is very short, still very big to the influence of warding off the lead protection layer.And existing production technique makes the large-area lead of warding off exist the possibility of little pore very big, so whole tower body work-ing life can not be oversize.Though heatproof glass reinforced plastic that occurs recently and graphite block composite anti-corrosive protected mode have some progressive; But its defective and deficiency also are tangible: at first be that graphite block is very little; The multilayer overlapping fissure of displacement causes a large amount of connection seams to handle, in case the connection seam is filled unreal and is used to lead to, sour water is directly in the face of the glass reinforced plastic preservative coat; A large amount of seams is leaned on manual handling, and mistake is inevitable; Secondly, the water-fast acidproof anti-again very difficult acquisition of pyritous adhesive glue more than 400 ℃.Existing acidproof water-resistant bonding glue, ultra only 250 ℃ of general working temperature under high temperature impact is cut off the water in power failure, leans on the connection seam meeting of this clay sealing breakdown, finally causes seepage.The glass reinforced plastic preservative coat exists little pore and heatproof problem equally; Especially maximum operation (service) temperature is very low, and the thermal conductivity of graphite linings is good again, in case the graphite block resist is destroyed; How long in fact the glass reinforced plastic resist do not adhere to that the work-ing life of this composite anti-corrosive protection tower also can not be oversize.
Summary of the invention
The purpose of the utility model just for overcome defective that venturi tower structure that above-mentioned existing sulfuric acid method titanium pigment production uses exists with not enough and provide a kind of can acidproof, water-fast, anti-rapid heat cycle, the composite anti-corrosive venturi tower of do not break seepage, long service life.
The purpose of the utility model comes three to realize through following technical scheme.
A kind of composite anti-corrosive venturi tower is used for sulfuric acid method titanium pigment production, and the utility model characteristic is: whole tower body is made up of several segmentation cylindrical shells, is lined with one deck stereotype in the steel casing the inside of each segmentation cylindrical shell, in stereotype, is lined with one deck silicon carbide ceramics again; Between stereotype and silicon carbide ceramics, be provided with the gap, in the gap, be filled with one deck lagging material.
Steel casing between each segmentation cylindrical shell of the utility model adopt ring flange with bolt to connecting; Stereotype has flange and turns over to ring flange.
The utility model is positioned at the silicon carbide ceramics layer joint face is provided with the leakproof tooth mouth that interlocks.
The silicon carbide ceramics air retaining wall of each segmentation cylindrical shell of the utility model adopts the whole tube structure that forms of firing.
The steel casing that the utility model tower body upper segment is positioned at below the section of top is set to adopt straight flange and bolt that each piece is linked to be an integral body from vertically being divided into 2～6.
The beneficial effect of the utility model is, corrosion protective covering can acidproof, water-fast, anti-rapid heat cycle, the seepage that is not easy to break, long service life prolong greatly.
Further set forth the utility model content below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is the utility model structure and vertical partial schematic sectional view;
Fig. 2 is the partial enlarged drawing of A portion among Fig. 1.
Embodiment
Like Fig. 1, shown in Figure 2, a kind of composite anti-corrosive venturi tower; Be used for sulfuric acid method titanium pigment production; The utility model characteristic is: whole tower body is made up of several segmentation cylindrical shells, is lined with one deck stereotype 2 in steel casing 1 the inside of each segmentation cylindrical shell, in stereotype, is lined with one deck silicon carbide ceramics 3 again; Between stereotype and silicon carbide ceramics, be provided with gap 4, in the gap, be filled with one deck lagging material 5, this lagging material adopts bonding cement.
Steel casing 1 between each segmentation cylindrical shell of the utility model adopts 7 pairs of connections of ring flange 6 usefulness bolts; Stereotype 2 has flange 8 and turns over to ring flange 6.
The utility model is positioned at the silicon carbide ceramics layer joint face is provided with the leakproof tooth mouth 9 that interlocks.
The silicon carbide ceramics air retaining wall of each segmentation cylindrical shell of the utility model adopts the whole tube structure that forms of firing.
Present embodiment is divided into four segmented body with tower body, makes second corrosion protective covering at inner surface lining one deck stereotype 2 of each segmented body steel casing 1.Flange 8 on the stereotype 2 turns over to segmentation shell flange dish 6, utilizes bolt 7 to make ring flange 6 pressure of two butt joints produce sealing effectiveness; Silicon carbide ceramics 3 with several sections integral body are burnt till is made first corrosion protective covering.Do not connect seam on the whole segmentation cylindrical shell silicon carbide ceramics air retaining wall.Connect with leakproof tooth mouth 9 between the segmentation cylindrical shell; For preventing that one deck heat-barrier coatings 5 are filled in the gap 4 between stereotype and silicon carbide ceramics because of the power failure high temperature impact that produces of cutting off the water damages plumbous preservative coat, prevent that steel plate place temperature is near 328 ℃ of the melting loss temperature of stereotype.Acidproof, water-fast, the anti-rapid heat cycle of silicon carbide ceramics, but under 0～450 ℃ of temperature shock long term operation and the seepage of not breaking; Plumbous preservative coat is different with warding off, and there is not little pore leakage problems in stereotype.Thereby as long as the stereotype skin temperature is controlled at below the melting loss temperature of stereotype, then sulfuric acid liquid can't infiltrate stereotype corrosion outer steel shell.In fact, through the heat insulating layer of special processing, can guarantee has a power failure, and the cut off the water top temperature at stereotype place, back is no more than 200 ℃.Like this,--the silicon carbide ceramics liner damages because of life-time service, second corrosion protective covering---stereotype liner can also protect the longer time even if first corrosion protective covering.Thereby the work-ing life of stereotype, silicon carbide ceramics composite anti-corrosive protection venturi tower is very long.
Depend on the time that corrosion protective covering is not destroyed the work-ing life of venturi tower.The silicon carbide ceramics layer has the performance of well acidproof, heat-resisting and anti-rapid heat cycle, is difficult to be destroyed.The performance that the gap connects shape and the bonding cement of seam has determined the work-ing life of silicon carbide ceramics as first resist.The use temperature of acidproof water-fast Abdichtungskitt is difficult to surpass 250 ℃ now, if resist exists too many not leakproof to connect seam, under 450 ℃ of high temperature repeated stocks, its work-ing life is the president not.For example make first resist with the multilayer graphite block.The utility model burns till an integral body with silicon carbide ceramics with the per minute section, has no the seam of connection, thereby has thoroughly solved connection seam leakage problems.Connecting seam between two segmented body adopts assembly as shown in Figure 2 to lean on leakproof tooth mouth syndeton.Sour water under action of gravity can not leak into outside the resist through this seam.Thereby the work-ing life of silicon carbide ceramics resist only depend on its heat impact strength.And because of power failure 0-450 ℃ the temperature variation that produces of cutting off the water is low-temperature impact as far as silicon carbide ceramics, very little to the influence of silicon carbide ceramics liner, thereby the life-span of silicon carbide ceramics monobloc(k)type resist is very long.
Stereotype is the insurance layer as second resist.Its life-span depends primarily on heatproof, acidproof and barrier performance.When producing impact high temperature as long as cut off the water, the temperature at metal stereotype protective layer place is not higher than 328 ℃ of the melting loss temperature of stereotype, then the lead protection layer is not produced material injury.For this reason, after the silicon carbide ceramics resist, fill the well behaved thermofin of one deck, guarantee that this temperature of entering the stereotype place is below 250 ℃.Like this, metal stereotype resist receives the influence of accident thermal shocking hardly, can life-time service and difficulty is destroyed.As shown in Figure 1.
On upper overturning 8 to the box hat ring flange 6 with stereotype 2, press the stereotype pressurized on the adjacent flanges and be out of shape, produce good sealing effectiveness at the pressure of joint bolt 7.Plumbous preservative coat is different with warding off, and there is not the possibility of any little pore in the stereotype preservative coat.Thereby sour water can not infiltrate stereotype resist and corrode outer steel shell.Thereby as long as stereotype does not destroy because of molten, the stereotype preservative coat does not have the time limit in theory to the corrosionproof protection of sulfuric acid liquid.
In order to cooperate the installation of silicon carbide ceramics monobloc(k)type corrosionproof protection liner, present embodiment is positioned at tower body upper segment 12 in top section 13 following steel casings 1 and is set to from vertically being divided into 2, adopts straight flange 10 with bolt 11 each piece to be linked to be an integral body.
Claims (5)
1. composite anti-corrosive venturi tower; Be used for sulfuric acid method titanium pigment production; It is characterized in that: whole tower body is made up of several segmentation cylindrical shells, is lined with one deck stereotype (2) in steel casing (1) the inside of each segmentation cylindrical shell, in stereotype, is lined with one deck silicon carbide ceramics (3) again; Between stereotype and silicon carbide ceramics, be provided with gap (4), in the gap, be filled with one deck lagging material (5).
2. a kind of composite anti-corrosive venturi tower as claimed in claim 1 is characterized in that:
Steel casing (1) between each segmentation cylindrical shell adopt ring flange (6) with bolt (7) to connection; Stereotype (2) has flange (8) and turns over to ring flange (6).
3. a kind of composite anti-corrosive venturi tower as claimed in claim 1 is characterized in that: be positioned at the silicon carbide ceramics layer joint face is provided with the leakproof tooth mouth (9) that interlocks.
4. a kind of composite anti-corrosive venturi tower as claimed in claim 1 is characterized in that: the silicon carbide ceramics air retaining wall of each segmentation cylindrical shell adopts the whole tube structure that forms of firing.
5. a kind of composite anti-corrosive venturi tower as claimed in claim 1; It is characterized in that: with tower body upper segment (12) be positioned at steel casing (1) below the top section (13) be set to adopt straight flange (10) and bolt (11) that each piece is linked to be an integral body from vertically being divided into 2～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202751897U CN202152284U (en) | 2011-08-01 | 2011-08-01 | Composite anticorrosive Venturi tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202751897U CN202152284U (en) | 2011-08-01 | 2011-08-01 | Composite anticorrosive Venturi tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152284U true CN202152284U (en) | 2012-02-29 |
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ID=45692787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202751897U Expired - Lifetime CN202152284U (en) | 2011-08-01 | 2011-08-01 | Composite anticorrosive Venturi tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821337A (en) * | 2018-06-21 | 2018-11-16 | 方嘉城 | A kind of preparation method of nano-titanium dioxide |
| CN111396888A (en) * | 2020-03-11 | 2020-07-10 | 绵阳油普能源科技有限责任公司 | Structure and method for preventing thermal decomposition equipment from being corroded |
-
2011
- 2011-08-01 CN CN2011202751897U patent/CN202152284U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821337A (en) * | 2018-06-21 | 2018-11-16 | 方嘉城 | A kind of preparation method of nano-titanium dioxide |
| CN111396888A (en) * | 2020-03-11 | 2020-07-10 | 绵阳油普能源科技有限责任公司 | Structure and method for preventing thermal decomposition equipment from being corroded |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunming Luquan Deli silicon carbide product Co., Ltd. Assignor: Hu Guangxiong Contract record no.: 2014530000063 Denomination of utility model: Composite anticorrosive Venturi tower Granted publication date: 20120229 License type: Exclusive License Record date: 20140527 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |
|
| CX01 | Expiry of patent term |