CN104154807A - Restoring method of block type graphite heat exchanging block - Google Patents
Restoring method of block type graphite heat exchanging block Download PDFInfo
- Publication number
- CN104154807A CN104154807A CN201410406644.0A CN201410406644A CN104154807A CN 104154807 A CN104154807 A CN 104154807A CN 201410406644 A CN201410406644 A CN 201410406644A CN 104154807 A CN104154807 A CN 104154807A
- Authority
- CN
- China
- Prior art keywords
- block
- graphite heat
- heat transfer
- type graphite
- hole type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Furnace Charging Or Discharging (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a restoring method of a block type graphite heat exchanging block. The restoring method comprises the following steps that the block type graphite heat exchanging block is placed into heated clear water for boiling, and reacted acid in the graphite heat exchanging block is removed; aged resin layers on the side face, the upper end face and the lower end face of the block type graphite heat exchanging block are removed by grinding though an angle grinder, after a thread lead screw is used for cleaning a material hole and a steam hole of the graphite heat exchanging block, flushing is carried out with clear water; the block type graphite heat exchanging block is placed into a drying oven for drying, and then the block type graphite heat exchanging block is taken out for natural cooling; the block type graphite heat exchanging block is placed into a dipping kettle for dipping treatment of phenolic resin; the dipped block type graphite heat exchanging block is dried in the air and then is placed in a heat processing kettle for heat processing; and the block type graphite heat exchanging block after heat processing is subjected to pressing checking. The clear water is used for boiling so that internal stress cannot be generated in the graphite heat exchanging block, the service life of the graphite heat exchanging block is prolonged, and after the aged resin layers are removed, the thickness of the resin layers cannot be increased additionally when the phenolic resin is dipped again.
Description
Technical field
The present invention relates to the restorative procedure of a kind of block hole type graphite heat transfer block, belong to the recovery technique field of graphite heat exchange block.
Background technology
Existing hole-type graphite heat exchanger is after use after a while, can produce the aging corrosion of resin bed of graphite block hole dipping, the material hole in graphite block hole and steam hole (or water hole) mutually penetrate and produce material from leakage and make heat exchanger can not continue to use, and need the repair process of disintegrating of heat exchanging piece.The restorative procedure of the graphite heat exchange block of existing hole-type graphite heat exchanger is as follows: 1, the clear water of graphite heat exchange block rinses; 2, with the buck of 7%-12%, graphite heat exchange block is carried out to soda boiling; 3, again graphite heat exchange block is carried out to clear water flushing; 4, the oven dry of graphite heat exchange block; 5, the dipping of graphite heat exchange block; 6, the heat treatment of graphite heat exchange block; 7, the monolithic of graphite heat exchange block is suppressed inspection.The problem that the restorative procedure of above graphite heat exchange block exists is: 1, during soda boiling owing to still existing phenolic hydroxyl group in phenolic resins, it is a kind of weakly acidic group, can with alkali generation chemical reaction, generate the phenol sodium of solubility, so phenolic resins is alkali-proof medium not, because chemical reaction is exothermic reaction, the Exposure of alkali lye and graphite heat exchange block is inhomogeneous, alkali lye is also not identical with the chemical reaction severe degree of phenolic hydroxyl group, inhomogeneities due to chemical reaction, will make the hot internal stress of generation in former impregnated graphite block not identical, cause the cracking of graphite block to damage or in use fragile, reduced the service life of graphite heat exchange block greatly.The reason of graphite heat exchange block damage easy to crack when maintenance soda boiling that Here it is; 2, existing graphite heat exchange block method for maintaining adopts clear water to rinse dirt and the partial impurities that can remove graphite heat exchange block surface, but can not remove the aging phenolic resins on former graphite block, in maintenance dipping process, new phenolic resins and old phenolic resins bond strength are low, make graphite heat exchange block in use resin bed easily come off, service life is low; Resin layer thickness is large, reduction of heat exchange efficiency, and energy resource consumption is large, does not reach energy-saving and cost-reducing object.In sum, the method for maintaining in existing hole-type graphite heat exchanger graphite block hole makes the service life in graphite block hole low, and energy resource consumption is large, causes huge economic loss to Chemical Manufacture enterprise.
Summary of the invention
The object of the invention is to: the restorative procedure of a kind of block hole type graphite heat transfer block is provided, solves the problem that existing restorative procedure exists, make the piece block hole type graphite heat transfer block long service life after repairing, reach energy-saving and cost-reducing object.
Technical scheme of the present invention: the restorative procedure of a kind of block hole type graphite heat transfer block, this restorative procedure comprises the following steps:
A, piece block hole type graphite heat transfer block is put in the clear water after heating and boiled, remove the residual acid in graphite heat exchange block;
B, with angle grinding machine, grind off the aged resin layer of piece block hole type graphite heat transfer block side and upper and lower end face, behind material hole and steam hole with the clean graphite heat exchange block of threaded screw rod, with clear water, rinse;
C, piece block hole type graphite heat transfer block is put into drying oven dry, then take out nature cooling;
D, piece block hole type graphite heat transfer block is put into dipping still carry out the impregnation process of phenolic resins;
After E, the piece block hole type graphite heat transfer block after dipping is good dry, put into heat treatment still to heat-treat;
F, the piece block hole type graphite heat transfer block after heat treatment is suppressed to inspection.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, before described steps A, first rinses piece block hole type graphite heat transfer block with clear water.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, after described step C, first purges after side, upper and lower end face, material hole and the steam hole of piece block hole type graphite heat transfer block with compressed air, then carries out step D.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, in described steps A, puts into clear water by piece block hole type graphite heat transfer block, and clear water is heated to 70-100 ℃, after heating water in boil 2-5 hour.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, in described step C, puts into drying oven by piece block hole type graphite heat transfer block, and temperature to be dried is after 70-100 ℃, stop heating up and be incubated 0.5 hour.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, the impregnation process of repeating step D and the heat treatment of step e 2-4 time, then carry out step F.
The restorative procedure of above-mentioned piece block hole type graphite heat transfer block, in described step F, carries out the water pressure test by piece block hole type graphite heat transfer block, and pressure is 0.4-1.0MPa, and test period is greater than 30 minutes.
Beneficial effect of the present invention: the piece block hole type graphite heat transfer block of reparation of the present invention is owing to adopting clear water to boil, do not have the phenolic hydroxyl group group of the phenolic resins in alkali and graphite heat exchange block to react, in graphite heat exchange block, do not have the generation of internal stress, extended widely the service life of graphite heat exchange block; Use cornea machine and threaded screw rod to remove after resin bed aging on graphite heat exchange block end face and in material hole and steam hole, again can additionally not increase the thickness of resin bed during impregnated phenolic resin again, graphite heat exchange block in use heat transfer effect is good, long service life, has reached energy-saving and cost-reducing object.
Accompanying drawing explanation
Accompanying drawing 1 is the main TV structure schematic diagram of of the present invention block hole type graphite heat transfer block;
Accompanying drawing 2 is the plan structure schematic diagram of of the present invention block hole type graphite heat transfer block;
Reference numeral: 1-piece block hole type graphite heat transfer block, 2-material hole, 3-steam hole.
The specific embodiment
Embodiments of the invention 1: the restorative procedure of a kind of block hole type graphite heat transfer block, this restorative procedure comprises the following steps:
A, clear water boil: first with clear water, rinse out the lip-deep residual acid of piece block hole type graphite heat transfer block 1 and dirt, then the piece block hole type graphite heat transfer block 1 of needs reparation is immersed in the container of clear water and is heated, heating-up temperature is 70-100 ℃, until water temperature, reach after 70-100 ℃, boil 2-5 hour, due to hydrone and the Brownian movement that remains in the acid molecule in piece block hole type graphite heat transfer block 1, the acid remaining in piece block hole type graphite heat transfer block 1 will be exuded in water, reaches the object of removing the 1 interior residual acid of piece block hole type graphite heat transfer block;
B, removing surface resin layer: with polish off the aged resin layer of piece block hole type graphite heat transfer block 1 side and upper and lower end face with the angle grinding machine of polished silicon wafer, note not damaging piece block hole type graphite heat transfer block 1 body and sealing surface; With threaded screw rod, the material hole 2 of piece block hole type graphite heat transfer block 1 is cleared up one by one with steam hole 3, disposed the aged resin layer of material hole 2 and steam hole 3 inner surfaces, and rinse with clear water;
C, cleaning and the piece block hole type graphite heat transfer block 1 that rinsed are put into drying oven oven dry fall the moisture between heat transfer block surface and heat transfer block interior molecules, so that the carrying out of phenolic resins in postorder operation, temperature to be dried is after 70-100 ℃, stop heating up and be incubated 0.5 hour, then takes out and naturally cools to normal temperature;
D, piece block hole type graphite heat transfer block 1 is put into dipping still carry out the impregnation process of phenolic resins, during processing, the water content mass percent of phenolic resins self is lower than 12%, and free phenol content mass percent is controlled at below 7% in phenolic resins, the content mass percent of phenolic resins Free Aldehyde is controlled at below 2%, and dip time is 10-15 hour;
After E, the piece block hole type graphite heat transfer block 1 after dipping is good dry, putting into heat treatment still heat-treats, heat treatment time is 10-15 hour, heat treatment temperature is 160-180 ℃, make phenolic resins become the solid netted molecule of intersection from linear molecule, arrive the object of phenolic resin curing, strengthen permeability resistance and the intensity of graphite heat exchange block, improve the service life of graphite block;
F, finally the piece block hole type graphite heat transfer block 1 after heat treatment is suppressed to inspection, hydraulic test pressure is 0.4-1.0MPa, and pressurize 30 minutes above not pressure release is qualified.
After step C, first with compressed air, purge side, upper and lower end face, material hole 2 and the steam hole 3 of piece block hole type graphite heat transfer block 1, to remove, remain in the dust on piece block hole type graphite heat transfer block, and then carry out step D.
After the impregnation process of repeating step D and the heat treatment of step e 2-4 time, then carry out step F, to make up the 1st time, flood and heat treated defect.
Embodiments of the invention 2: the restorative procedure of a kind of block hole type graphite heat transfer block, this restorative procedure comprises the following steps:
A, clear water boil: first with clear water, rinse out the lip-deep residual acid of piece block hole type graphite heat transfer block 1 and dirt, then the piece block hole type graphite heat transfer block 1 of needs reparation is immersed in the container of clear water and is heated, heating-up temperature is 70 ℃, until water temperature, reach after 70 ℃, boil 2 hours, due to hydrone and the Brownian movement that remains in the acid molecule in piece block hole type graphite heat transfer block 1, the acid remaining in piece block hole type graphite heat transfer block 1 will be exuded in water, reaches the object of removing the 1 interior residual acid of piece block hole type graphite heat transfer block;
B, removing surface resin layer: with polish off the aged resin layer of piece block hole type graphite heat transfer block 1 side and upper and lower end face with the angle grinding machine of polished silicon wafer, note not damaging piece block hole type graphite heat transfer block 1 body and sealing surface; With threaded screw rod, the material hole 2 of piece block hole type graphite heat transfer block 1 is cleared up one by one with steam hole 3, disposed the aged resin layer of material hole 2 and steam hole 3 inner surfaces, and rinse with clear water;
C, cleaning and the piece block hole type graphite heat transfer block 1 that rinsed are put into drying oven oven dry fall the moisture between heat transfer block surface and heat transfer block interior molecules, so that the carrying out of phenolic resins in postorder operation, temperature to be dried is after 70 ℃, stop heating up and be incubated 0.5 hour, then takes out and naturally cools to normal temperature;
D, piece block hole type graphite heat transfer block 1 is put into dipping still carry out the impregnation process of phenolic resins, during processing, the water content mass percent of phenolic resins self is lower than 12%, and free phenol content mass percent is controlled at below 7% in phenolic resins, the content mass percent of phenolic resins Free Aldehyde is controlled at below 2%, and dip time is 10 hours;
After E, the piece block hole type graphite heat transfer block 1 after dipping is good dry, putting into heat treatment still heat-treats, heat treatment time is 10 hours, heat treatment temperature is 160 ℃, make phenolic resins become the solid netted molecule of intersection from linear molecule, arrive the object of phenolic resin curing, strengthen permeability resistance and the intensity of graphite heat exchange block, improve the service life of graphite block;
F, finally the piece block hole type graphite heat transfer block 1 after heat treatment is suppressed to inspection, hydraulic test pressure is 0.4-1.0MPa, and pressurize 30 minutes above not pressure release is qualified.
After step C, first with compressed air, purge side, upper and lower end face, material hole 2 and the steam hole 3 of piece block hole type graphite heat transfer block 1, to remove, remain in the dust on piece block hole type graphite heat transfer block, and then carry out step D.
After the impregnation process of repeating step D and the heat treatment of step e 2 times, then carry out step F, to make up the 1st time, flood and heat treated defect.
The sour residual quantity of the hole piece formula graphite heat exchange block 1 after this embodiment processes is less, and the heat transfer block that the intensity of the hole piece formula graphite heat exchange block 1 after reparation is made than common material can improve 3 times of left and right, and its temperature tolerance and anticorrosive property have improved 15% left and right.
Embodiments of the invention 3: the restorative procedure of a kind of block hole type graphite heat transfer block, this restorative procedure comprises the following steps:
A, clear water boil: first with clear water, rinse out the lip-deep residual acid of piece block hole type graphite heat transfer block 1 and dirt, then the piece block hole type graphite heat transfer block 1 of needs reparation is immersed in the container of clear water and is heated, heating-up temperature is 85 ℃, until water temperature, reach after 85 ℃, boil 3.5 hours, due to hydrone and the Brownian movement that remains in the acid molecule in piece block hole type graphite heat transfer block 1, the acid remaining in piece block hole type graphite heat transfer block 1 will be exuded in water, reaches the object of removing the 1 interior residual acid of piece block hole type graphite heat transfer block;
B, removing surface resin layer: with polish off the aged resin layer of piece block hole type graphite heat transfer block 1 side and upper and lower end face with the angle grinding machine of polished silicon wafer, note not damaging piece block hole type graphite heat transfer block 1 body and sealing surface; With threaded screw rod, the material hole 2 of piece block hole type graphite heat transfer block 1 is cleared up one by one with steam hole 3, disposed the aged resin layer of material hole 2 and steam hole 3 inner surfaces, and rinse with clear water;
C, cleaning and the piece block hole type graphite heat transfer block 1 that rinsed are put into drying oven oven dry fall the moisture on it, temperature to be dried is after 85 ℃, stop heating up and be incubated 0.5 hour, and then taking-up naturally cools to normal temperature;
D, piece block hole type graphite heat transfer block 1 is put into dipping still carry out the impregnation process of phenolic resins, during processing, the water content mass percent of phenolic resins self is lower than 12%, and free phenol content mass percent is controlled at below 7% in phenolic resins, the content mass percent of phenolic resins Free Aldehyde is controlled at below 2%, and dip time is 13 hours;
After E, the piece block hole type graphite heat transfer block 1 after dipping is good dry, putting into heat treatment still heat-treats, heat treatment time is 13 hours, heat treatment temperature is 170 ℃, make phenolic resins become the solid netted molecule of intersection from linear molecule, arrive the object of phenolic resin curing, strengthen permeability resistance and the intensity of graphite heat exchange block, improve the service life of graphite block;
F, finally the piece block hole type graphite heat transfer block 1 after heat treatment is suppressed to inspection, hydraulic test pressure is 0.4-1.0MPa, and pressurize 30 minutes above not pressure release is qualified.
After step C, first with compressed air, purge side, upper and lower end face, material hole 2 and the steam hole 3 of piece block hole type graphite heat transfer block 1, to remove, remain in the dust on piece block hole type graphite heat transfer block, and then carry out step D.
After the impregnation process of repeating step D and the heat treatment of step e 3 times, then carry out step F, to make up the 1st time, flood and heat treated defect.
Still less, the heat transfer block that the intensity of the hole piece formula graphite heat exchange block 1 after reparation is made than common material can improve 5 times of left and right to the sour residual quantity of the hole piece formula graphite heat exchange block 1 after this embodiment processes, and its temperature tolerance and anticorrosive property have improved 25% left and right.
Embodiments of the invention 4: the restorative procedure of a kind of block hole type graphite heat transfer block, this restorative procedure comprises the following steps:
A, clear water boil: first with clear water, rinse out the lip-deep residual acid of piece block hole type graphite heat transfer block 1 and dirt, then the piece block hole type graphite heat transfer block 1 of needs reparation is immersed in the container of clear water and is heated, heating-up temperature is 100 ℃, until water temperature, reach after 100 ℃, boil 5 hours, due to hydrone and the Brownian movement that remains in the acid molecule in piece block hole type graphite heat transfer block 1, the acid remaining in piece block hole type graphite heat transfer block 1 will be exuded in water, reaches the object of removing the 1 interior residual acid of piece block hole type graphite heat transfer block;
B, removing surface resin layer: with polish off the aged resin layer of piece block hole type graphite heat transfer block 1 side and upper and lower end face with the angle grinding machine of polished silicon wafer, note not damaging piece block hole type graphite heat transfer block 1 body and sealing surface; With threaded screw rod, the material hole 2 of piece block hole type graphite heat transfer block 1 is cleared up one by one with steam hole 3, disposed the aged resin layer of material hole 2 and steam hole 3 inner surfaces, and rinse with clear water;
C, cleaning and the piece block hole type graphite heat transfer block 1 that rinsed are put into drying oven oven dry fall the moisture on it, temperature to be dried is after 100 ℃, stop heating up and be incubated 0.5 hour, and then taking-up naturally cools to normal temperature;
D, piece block hole type graphite heat transfer block 1 is put into dipping still carry out the impregnation process of phenolic resins, during processing, the water content mass percent of phenolic resins self is lower than 12%, and free phenol content mass percent is controlled at below 7% in phenolic resins, the content mass percent of phenolic resins Free Aldehyde is controlled at below 2%, and dip time is 15 hours;
After E, the piece block hole type graphite heat transfer block 1 after dipping is good dry, putting into heat treatment still heat-treats, heat treatment time is 15 hours, heat treatment temperature is 180 ℃, make phenolic resins become the solid netted molecule of intersection from linear molecule, arrive the object of phenolic resin curing, strengthen permeability resistance and the intensity of graphite heat exchange block, improve the service life of graphite block;
F, finally the piece block hole type graphite heat transfer block 1 after heat treatment is suppressed to inspection, hydraulic test pressure is 0.4-1.0MPa, and pressurize 30 minutes above not pressure release is qualified.
After step C, first with compressed air, purge side, upper and lower end face, material hole 2 and the steam hole 3 of piece block hole type graphite heat transfer block 1, to remove, remain in the dust on piece block hole type graphite heat transfer block, and then carry out step D.
After the impregnation process of repeating step D and the heat treatment of step e 4 times, then carry out step F, to make up the 1st time, flood and heat treated defect.
The sour residual quantity of the hole piece formula graphite heat exchange block 1 after this embodiment processes is considerably less, the heat transfer block that the intensity of the hole piece formula graphite heat exchange block 1 after reparation is made than common material can improve 8 times of left and right, and its temperature tolerance and anticorrosive property have improved 35% left and right.
Claims (7)
1. a restorative procedure for piece block hole type graphite heat transfer block, is characterized in that: this restorative procedure comprises the following steps:
A, piece block hole type graphite heat transfer block (1) is put in the clear water after heating and boiled, remove the residual acid in graphite heat exchange block (1);
B, with angle grinding machine, grind off the aged resin layer of piece block hole type graphite heat transfer block (1) side and upper and lower end face, behind material hole (2) and steam hole (3) with the clean graphite heat exchange block (1) of threaded screw rod, with clear water, rinse;
C, piece block hole type graphite heat transfer block (1) is put into drying oven dry, then take out nature cooling;
D, piece block hole type graphite heat transfer block (1) is put into dipping still carry out the impregnation process of phenolic resins;
After E, the piece block hole type graphite heat transfer block (1) after dipping is good dry, put into heat treatment still to heat-treat;
F, the piece block hole type graphite heat transfer block (1) after heat treatment is suppressed to inspection.
2. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, is characterized in that: before described steps A, first with clear water, rinse piece block hole type graphite heat transfer block (1).
3. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, it is characterized in that: after described step C, first with compressed air, purge after side, upper and lower end face, material hole (2) and the steam hole (3) of piece block hole type graphite heat transfer block (1), then carry out step D.
4. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, is characterized in that: in described steps A, piece block hole type graphite heat transfer block (1) is put into clear water, and clear water is heated to 70-100 ℃, after heating water in boil 2-5 hour.
5. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, is characterized in that: in described step C, piece block hole type graphite heat transfer block (1) is put into drying oven, temperature to be dried is after 70-100 ℃, stop heating up and be incubated 0.5 hour.
6. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, is characterized in that: the impregnation process of repeating step D and the heat treatment of step e 2-4 time, then carry out step F.
7. the restorative procedure of according to claim 1 block hole type graphite heat transfer block, is characterized in that: in described step F, piece block hole type graphite heat transfer block (1) is carried out to the water pressure test, pressure is 0.4-1.0MPa, and test period is greater than 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406644.0A CN104154807B (en) | 2014-08-18 | 2014-08-18 | A kind of restorative procedure of piece of block hole type graphite heat transfer block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406644.0A CN104154807B (en) | 2014-08-18 | 2014-08-18 | A kind of restorative procedure of piece of block hole type graphite heat transfer block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154807A true CN104154807A (en) | 2014-11-19 |
| CN104154807B CN104154807B (en) | 2016-08-17 |
Family
ID=51880374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410406644.0A Active CN104154807B (en) | 2014-08-18 | 2014-08-18 | A kind of restorative procedure of piece of block hole type graphite heat transfer block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104154807B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319730A (en) * | 2019-07-11 | 2019-10-11 | 南通晨光石墨设备有限公司 | A kind of production technology of graphite corrugated heat-exchange plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804775Y (en) * | 2005-07-11 | 2006-08-09 | 山东赫达股份有限公司 | Graphite heat exchanger |
| CN201885606U (en) * | 2010-09-28 | 2011-06-29 | 山西太钢不锈钢股份有限公司 | Cooler for acid purification |
| CN102455147A (en) * | 2010-10-25 | 2012-05-16 | 南通京通石墨设备有限公司 | Micro-leakage repairing device of graphite heat exchange block |
| CN202304495U (en) * | 2011-10-19 | 2012-07-04 | 焦作东方海纳科技发展有限公司 | Round block type graphite heat exchanger resistant to high pressure and easy to clean |
-
2014
- 2014-08-18 CN CN201410406644.0A patent/CN104154807B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804775Y (en) * | 2005-07-11 | 2006-08-09 | 山东赫达股份有限公司 | Graphite heat exchanger |
| CN201885606U (en) * | 2010-09-28 | 2011-06-29 | 山西太钢不锈钢股份有限公司 | Cooler for acid purification |
| CN102455147A (en) * | 2010-10-25 | 2012-05-16 | 南通京通石墨设备有限公司 | Micro-leakage repairing device of graphite heat exchange block |
| CN202304495U (en) * | 2011-10-19 | 2012-07-04 | 焦作东方海纳科技发展有限公司 | Round block type graphite heat exchanger resistant to high pressure and easy to clean |
Non-Patent Citations (1)
| Title |
|---|
| 高炎武: "《中华人民共和国化学工业部设备维护检修规程 第七分册：化工部分》", 31 October 1992 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319730A (en) * | 2019-07-11 | 2019-10-11 | 南通晨光石墨设备有限公司 | A kind of production technology of graphite corrugated heat-exchange plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104154807B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104818648B (en) | The method that a kind of modified carbon fiber of utilization manganese dioxide prepares paper friction material | |
| CN110981525A (en) | Repairing method of carbon-carbon composite material | |
| CN102389885A (en) | Cleaning technology for spare flux pipeline in polyester production device | |
| CN103252477A (en) | Efficient ceramic core removal device for hollow blade | |
| CN104324922A (en) | Method for removing adhesive residue of touch screen | |
| CN113387714A (en) | Method for repairing damage to non-friction surface of aircraft carbon brake disc | |
| CN113880605B (en) | Method for modifying polytetrafluoroethylene impregnated graphite by dynamic isostatic pressing method | |
| CN110665927A (en) | Nondestructive cleaning process of optical glass for laser system | |
| CN104154807A (en) | Restoring method of block type graphite heat exchanging block | |
| CN102125914A (en) | Ultrasonic surface cleaning process for forged workpiece | |
| CN103878145B (en) | A kind of method that LGS wafer is cleaned | |
| CN107090582A (en) | A kind of bite method detected for the grinding burn of bearing parts surface | |
| CN103882441A (en) | Repairing method of 2Cr12NiMo1W1V blade surface Al coating | |
| CN106733907A (en) | A kind of cleaning method of nuclear fuel element screen work band | |
| CN103924054B (en) | The aviation rust-proofing method of 20A steel pipe | |
| CN107915499B (en) | Method for repairing C/SiC ceramic matrix composite | |
| CN108630522A (en) | The cleaning method of chip surface | |
| CN105506654A (en) | Derusting processing process of spring steel | |
| CN108252105A (en) | A kind of surface treatment method of glass fabric | |
| WO2017206271A1 (en) | Process for producing waste-fabric fiber brake-pad friction material | |
| CN104209703A (en) | End socket manufacturing process | |
| CN108069729A (en) | A kind of restorative procedure of SiC/SiC ceramic matric composites | |
| CN111873098A (en) | Pretreatment method for engineering bamboo production | |
| CN112427408A (en) | Efficient UV adhesive removing method | |
| CN110328341A (en) | A kind of silicon-base ceramic core removal methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |