CN206288991U - Single-stage hot water drives horizontal tube falling film evaporation device - Google Patents
Single-stage hot water drives horizontal tube falling film evaporation device Download PDFInfo
- Publication number
- CN206288991U CN206288991U CN201621259475.3U CN201621259475U CN206288991U CN 206288991 U CN206288991 U CN 206288991U CN 201621259475 U CN201621259475 U CN 201621259475U CN 206288991 U CN206288991 U CN 206288991U
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- evaporator
- hot water
- pipe
- steam
- falling film
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000001704 evaporation Methods 0.000 title claims abstract description 33
- 230000008020 evaporation Effects 0.000 title claims abstract description 33
- 239000011552 falling film Substances 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 239000010842 industrial wastewater Substances 0.000 claims abstract description 6
- 239000013589 supplement Substances 0.000 claims description 22
- 239000012141 concentrate Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 5
- 239000013535 sea water Substances 0.000 abstract description 15
- 238000009776 industrial production Methods 0.000 abstract description 7
- 238000010795 Steam Flooding Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000004821 distillation Methods 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 26
- 239000007789 gas Substances 0.000 description 10
- 239000002351 wastewater Substances 0.000 description 7
- 239000012535 impurity Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Horizontal tube falling film evaporation device is driven the utility model discloses a kind of single-stage hot water, the single-stage hot water that particularly a kind of utilization industrial waste heat water-driven evaporator desalinizes seawater drives horizontal tube falling film evaporation device, belongs to sea water desalinating unit technical field；The device includes 1 steam generator, at least one evaporator and condenser, industrial wastewater is carried out by treatment by steam generator and is provided with steam to evaporator, double evaporation-cooling is carried out to seawater in evaporator, steam finally enters and condensation collection is carried out in condenser, and collects the condensate liquid in evaporator；The utility model solves the problems, such as the water resource and heat-energy losses occurred due to discharge of steam in industrial production, without steam drive, driven without electric energy compressed steam, hot water is only needed to be capable of achieving the distillation of liquid, the condensate liquid of hot water can be realized collecting, moreover it is possible to realize liquid separated in horizontal pipe falling film evaporator.
Description
Technical field
The utility model is related to a kind of sea water desalinating unit, particularly a kind of using the desalination of industrial waste heat water-driven evaporator
The single-stage hot water of seawater drives horizontal tube falling film evaporation device, belongs to sea water desalinating unit technical field.
Background technology
At present, numerous distilling apparatus have many designs, forced circulation, flash distillation, horizontal tube falling film etc. meeting on Liquid liquid Separation,
These designs are required to consume steam drive, also have using the both vapor compression distilling apparatus of electrical energy drive.Electric energy and steam drive
High-grade energy is consumed, and there are a large amount of hot water in industrial production, existing distilling apparatus is provided without hot water as power
Drive, horizontal tube falling film evaporation device is provided without hot water driving.
In the industrial production, especially coastal, most industrial production needs substantial amounts of fresh water, light after utilization
Water liquid can be reused by filtration treatment, and also substantial portion of water is due to the vapour by the high temperature in industrial production
Change forms vapor and is lost, and not only wastes water resource and wastes substantial amounts of heat, if it is possible to fully utilizes
Resource is saved and the reduction of cost is all significant.
The content of the invention
Goal of the invention of the present utility model is：For above-mentioned problem, there is provided one kind is in order to overcome existing transverse tube
Falling film evaporation device drives the deficiency of dynamic design, can be used as power using low-grade hot water and drive separated liquid, rationally
The energy of hot water in production process is make use of, the single-stage hot water that can also collect the condensate liquid separated from hot water drives horizontal stroke
Pipe falling film evaporation device.
The technical solution adopted in the utility model is as follows：
A kind of single-stage hot water drives horizontal tube falling film evaporation device, including 1 steam generator, at least one evaporator and cold
Condenser, the steam generator is provided with inlet, gas outlet and leakage fluid dram, and the evaporator is provided with the condensate liquid mouth of pipe, feed liquid
The supplement mouth of pipe, feed liquid discharge and the steam mouth of pipe for steam circulation, the steam channel of each evaporator and steam generation
Device gas outlet series connection connect with condenser device, feed liquid supplement the mouth of pipe parallel connection with feed liquid supplement pipe connects, the condenser with it is cold
Solidifying water pipe connection.
The waste water and steam of industry generation are by the way that after steam generator, steam enters evaporation by the gas outlet of steam generator
Device, liquid enters concentrate gathering tube, and seawater enters evaporator by feed liquid supplement pipe, and steam allows seawater to vaporize in evaporator,
Double evaporation-cooling is realized, the steam of seawater vaporization and the steam as driving sequentially enter next stage evaporator, condensed until entering
Condensate liquid is formed after device, is condensed into and enters condensate pipe after liquid, and steam is due to temperature reduction liquefaction in the evaporator, is passed through
The condensate liquid mouth of pipe enters condensate pipe.
Single-stage hot water of the present utility model drives horizontal tube falling film evaporation device, and the evaporator is 4.Ensure that treatment
Ability and water supply capacity.
Single-stage hot water driving horizontal tube falling film evaporation device of the present utility model, the condensate liquid mouth of pipe includes 1 condensate liquid
Import and 2 condensate outlets.
Further, the condensate liquid Tandem is connected with condensate pipe.The condensate liquid for most starting out is with certain
Steam, and with certain temperature, in order to sufficiently utilize waste heat, sequentially enter next stage evaporator, finally out
The adjoint quantity of steam of condensate liquid is minimized.
Single-stage hot water of the present utility model drives horizontal tube falling film evaporation device, and the condensate liquid mouth of pipe can also be by parallel connection
Mode connected with condensate pipe.Liquefied condensate liquid is directly collected using mode in parallel, the pipeline of condensate liquid can be shortened
Distance.
Single-stage hot water of the present utility model drives horizontal tube falling film evaporation device, positioned at the evaporation of feed liquid supplement pipe distal end
The feed liquid discharge of device is connected with concentrate gathering tube, and the feed liquid discharge of other each evaporators is by circulating pump and material
Liquid supplement pipe connection.Feed liquid can be made to enter after evaporation is utilized using this mode to recycle again, fully carry out seawater light
Change is processed.
Further, the feed liquid discharge positioned at the evaporator of feed liquid supplement pipe distal end also by circulating pump and is expected
Liquid supplement pipe connection.The temperature of afterbody outflow seawater higher can either again be circulated by profit using the design of which
With while accelerating suit equipment maritime interior waters discharge when equipment stops.
Further, the feed liquid discharge can also be connected by way of parallel connection with concentrate gathering tube.Can
Quickly discharge the liquid in evaporator.
Single-stage hot water of the present utility model drives horizontal tube falling film evaporation device, and the steam generator is also including having cavity
Housing, enclosure interior is from top to bottom disposed with foam-blocker, dividing plate and distributor, and the dividing plate middle part is additionally provided with circulation
Returning charge cylinder, the inlet is connected with distributor, and gas outlet is located on the housing where above foam-blocker, and leakage fluid dram is located at housing
Lower section.The foam that impurity and steam in industrial waste water are produced with waste water can be effectively filtered out using this mode.
Further, the distributor is annulus, and the injection channel for industrial wastewater injection is offered on distributor.
Further, the injection channel is the annular groove being opened on annulus.
Further, Open Side Down for the annular groove.Larger impurity can be made to enter steam generator lower precipitation backward.
In sum, by adopting the above-described technical solution, the beneficial effects of the utility model are：Using the utility model
Single-stage hot water drive horizontal tube falling film evaporation device solve the water resource and heat occurred due to discharge of steam in industrial production
The problem of the loss of energy, the utility model drives without steam drive without electric energy compressed steam, only needs hot water to be capable of achieving liquid
The distillation of body, can realize collecting the condensate liquid of hot water, moreover it is possible to realize liquid separated in horizontal pipe falling film evaporator, lift water
The utilization rate of resource and the energy, effectively reduces production cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of evaporator；
Fig. 3 is the structural representation of steam generator.
Marked in figure：1- I effect evaporator, 2- II effect evaporator, 3- III effect evaporator, 4- IV effect evaporator, 5- condensers,
6- steam generators, 6a- inlets, 6b- gas outlets, 6c- leakage fluid drams, 601- housings, 602- foam-blockers, 603- dividing plates, 604-
Distributor, 605- circulation returning charges cylinder, 606- service ports, 7- circulating pumps, 8- condensate pipes, 9- feed liquids supplement pipe, 10- condensate lines
Mouth, the import of 10a- condensate liquids, 10b- condensate outlets, the 11- steam mouth of pipe, 11a- steam inlets, 11b- steam (vapor) outlets, 12- material
The liquid supplement mouth of pipe, 13- feed liquids discharge, 14- used heat supply mains, 15- concentrate gathering tubes.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
Embodiment 1
Single-stage hot water drives horizontal tube falling film evaporation device, as shown in figure 1, including 1 steam generator 6, at least one evaporation
Device and condenser 5, as shown in figure 3, steam generator is provided with inlet 6a, gas outlet 6b and leakage fluid dram for introducing hot water
6c；As shown in Fig. 2 the evaporator is provided with the condensate liquid mouth of pipe 10, the feed liquid supplement mouth of pipe 12, feed liquid discharge 13 and for steaming
The logical steam mouth of pipe 11 of steam flow, the gas outlet 6b series connection of the steam channel and steam generator of each evaporator and condenser device 5
Connection,（For example：Gas outlet 6b is connected with the steam inlet 11a of I effect evaporator 1, the steam (vapor) outlet 11b and II of I effect evaporator 1
Imitate the steam inlet 11a connections of evaporator 2, the steam inlet 11a of the effect evaporators 3 of steam (vapor) outlet 11b and III of II effect evaporator
Connection, the steam (vapor) outlet 11b of III effect evaporator 3 is connected with the steam inlet 11a of IV effect evaporator 4, the steam of IV effect evaporator 4
Outlet 11b is connected with condenser 5）, the feed liquid supplement mouth of pipe 12 of evaporator is in parallel to be connected with feed liquid supplement pipe 9, the condenser 5
Connected with condensate pipe 8.
In the present embodiment, the waste water and steam that industry is produced enter steaming by used heat supply mains 14 by inlet 601
After vapour generator 6, steam enters I and imitates evaporator 1 by the gas outlet 602 of steam generator 6, and liquid enters concentrate gathering tube
15, seawater enters evaporator by feed liquid supplement pipe 9, and steam allows seawater to vaporize in evaporator, realizes double evaporation-cooling, seawater vaporization
Steam and sequentially enter next stage evaporator as the steam for driving, until entering condenser 5, be condensed into after liquid and enter cold
Solidifying water pipe 8, and condensate liquid is formed after steam is due to temperature reduction liquefaction in the evaporator, entered by the condensate liquid mouth of pipe 10 and condensed
Water pipe 8.
Specifically, on the basis of above-mentioned specific embodiment, wherein in a specific embodiment, evaporator is 4,
I.e. as shown in figure 1, including：The I effect effect effect evaporator 4 of evaporator 3 and IV of evaporator 2, III of evaporator 1, II.Work can be made full use of
The heat and steam of industry waste water.Certainly, which is not limited to 4, and difference is may be arranged as in other implementation method
Quantity, according to real-world environment demand, for example, it is set to 1,2,3 or 6.
In above-mentioned design basis, further designed for the condensate liquid mouth of pipe 10, it is cold in another specific embodiment
The lime set mouth of pipe 10 includes 1 condensate liquid import 10a and 2 condensate outlet 10b.A wherein condensate outlet 10b is located at evaporation
End where the outlet of device transverse tube, for collecting the condensate liquid from transverse tube out, another condensate outlet 10b is then located at evaporator
End where transverse tube entrance, and against condensate liquid import 10a.Further, in order to effectively lift the temperature of condensate liquid itself
The steam in condensate liquid is spent and is contained in, wherein in a specific embodiment, the condensate liquid Tandem connects with condensate pipe 8
It is logical, for example：The condensate inlet 10a of I effect evaporator 1 is closed, the effect evaporators 2 of condensate outlet 10b and II of I effect evaporator 1
Condensate inlet 10a connection, II effect evaporator 2 condensate outlet 10b with III effect evaporator 3 condensate inlet 10a company
Logical, the condensate outlet 10b of III effect evaporator 3 is connected with the condensate inlet 10a of IV effect evaporator 4, and IV imitates the cold of evaporator 4
Condensate outlet 10b is connected with condensate pipe 8.The condensate liquid for most starting out with certain steam, and with certain temperature
Degree, in order to sufficiently utilize waste heat, sequentially enters next stage evaporator, the adjoint quantity of steam minimum of final out condensate liquid
Change.
Certainly, using the outlet of condensate liquid as the design for routinizing, it is also possible to be only designed as 1 condensate liquid mouth of pipe 10.Cause
This, on the basis of implementation method in summary, the connected mode of the condensate liquid mouth of pipe 10 is not limited only to the mode of series connection,
In another specific embodiment, the condensate liquid mouth of pipe 10 can also be connected by way of parallel connection with condensate pipe 8.Each evaporator
The condensate liquid mouth of pipe 10 directly connected with condensate pipe 8, directly collect liquefied condensate liquid using mode in parallel, can shorten
The pipeline distance of condensate liquid.
In another specific embodiment, positioned at the feed liquid discharge 13 of the evaporator of feed liquid supplement pipe 9 distal end
Connected with concentrate gathering tube 15, the feed liquid discharge 13 of other each evaporators supplements pipe 9 and connects by circulating pump 7 and feed liquid
It is logical.For example, as shown in figure 1, I effect evaporator 1 is located at the distal end that feed liquid supplements pipe 9, therefore, the discharging modes of material are by string
Join the passage for being formed, i.e., be sequentially：The IV effect effect effect effect evaporator 1 of evaporator 2 to I of evaporator 3, II of evaporator 4, III.Using this
Mode makes full use of the temperature in system seawater is fully desalinated.On the basis of designing herein, further, positioned at described
The feed liquid discharge 13 of the evaporator of feed liquid supplement pipe 9 distal end also supplements pipe 9 and connects by circulating pump 7 and feed liquid.Ensure that
The discharge of concentrate after evaporation, while also recycling the concentrate of material channel afterbody again.
In another specific embodiment, the parallel connection of feed liquid discharge 13 is connected with concentrate gathering tube 15.Can be quick
Liquid inside effective discharge evaporator.
Steam generator 6 due to be for industrial thermal wastewater in, the impurity contained in waste water is more, and one is specific real wherein
Apply in mode, steam generator 6 also includes the housing 601 with cavity, and enclosure interior is from top to bottom disposed with foam-blocker
602nd, dividing plate 603 and distributor 604, the dividing plate middle part are additionally provided with circulation returning charge cylinder 605, the inlet 6a and distributor
604 connections, gas outlet 6b is located on the housing where above foam-blocker 602, and leakage fluid dram 6c is located at housing lower section.Using this mode
The foam that impurity and steam in industrial waste water are produced with waste water can effectively be filtered out.Specifically, distributor 604 is circle
Ring-shaped, offers the injection channel for industrial wastewater injection on annulus.Used as preferred, injection channel is to be opened in annulus
On annular groove.Further, Open Side Down for annular groove.Larger impurity can be made to enter steam generator lower precipitation backward.More
Specifically, being additionally provided with the equipment maintenance port 606 for maintenance of equipment on steam generator 6.
In sum, in driving horizontal tube falling film evaporation device to solve industrial production using single-stage hot water of the present utility model
The water resource and the problem of heat-energy losses occurred due to discharge of steam, the utility model without steam drive, without electric energy
Compressed steam drives, and only needs hot water to be capable of achieving the distillation of liquid, can realize collecting the condensate liquid of hot water, moreover it is possible to realize that liquid exists
The utilization rate of separated in horizontal pipe falling film evaporator, lifting water resource and the energy, effectively reduces production cost.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of single-stage hot water drives horizontal tube falling film evaporation device, it is characterised in that：Including 1 steam generator（6）, at least 1
Individual evaporator and condenser（5）, the steam generator is provided with inlet（6a）, gas outlet（6b）And leakage fluid dram（6c）, institute
State evaporator and be provided with the condensate liquid mouth of pipe（10）, feed liquid supplement the mouth of pipe（12）, feed liquid discharge（13）With circulate for steam
The steam mouth of pipe（11）, the steam channel of each evaporator and the gas outlet of steam generator（6b）Series connection and condenser device（5）Even
It is logical, the feed liquid supplement mouth of pipe（12）It is in parallel to supplement pipe with feed liquid（9）Connection, the condenser（5）With condensate pipe（8）Connection.
2. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：The evaporator is 4
It is individual.
3. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：The condensate liquid mouth of pipe
（10）Including 1 condensate liquid import（10a）With 2 condensate outlets（10b）.
4. single-stage hot water as claimed in claim 3 drives horizontal tube falling film evaporation device, it is characterised in that：The condensate liquid passage
Series connection and condensate pipe（8）Connection.
5. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：The condensate liquid mouth of pipe
（10）In parallel and condensate pipe（8）Connection.
6. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：Mended positioned at the feed liquid
Fill pipe（9）The feed liquid discharge of the evaporator of distal end（13）With concentrate gathering tube（15）Connection, other each evaporators
Feed liquid discharge（13）By circulating pump（7）Supplemented with feed liquid and managed（9）Connection.
7. single-stage hot water as claimed in claim 6 drives horizontal tube falling film evaporation device, it is characterised in that：Mended positioned at the feed liquid
Fill pipe（9）The feed liquid discharge of the evaporator of distal end（13）Also pass through circulating pump（7）Supplemented with feed liquid and managed（9）Connection.
8. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：The feed liquid discharge pipe
Mouthful（13）In parallel and concentrate gathering tube（15）Connection.
9. single-stage hot water as claimed in claim 1 drives horizontal tube falling film evaporation device, it is characterised in that：The steam generator
（6）Also include the housing with cavity（601）, enclosure interior is from top to bottom disposed with foam-blocker（602）, dividing plate（603）
And distributor（604）, the dividing plate middle part is additionally provided with circulation returning charge cylinder（605）, the inlet（6a）With distributor（604）
Connection, gas outlet（6b）Positioned at foam-blocker（602）On housing where top, leakage fluid dram（6c）Positioned at housing lower section.
10. single-stage hot water as claimed in claim 9 drives horizontal tube falling film evaporation device, it is characterised in that：The distributor
（604）It is annulus, the injection channel for industrial wastewater injection is offered on annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621259475.3U CN206288991U (en) | 2016-11-23 | 2016-11-23 | Single-stage hot water drives horizontal tube falling film evaporation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621259475.3U CN206288991U (en) | 2016-11-23 | 2016-11-23 | Single-stage hot water drives horizontal tube falling film evaporation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206288991U true CN206288991U (en) | 2017-06-30 |
Family
ID=59100271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621259475.3U Active CN206288991U (en) | 2016-11-23 | 2016-11-23 | Single-stage hot water drives horizontal tube falling film evaporation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206288991U (en) |
-
2016
- 2016-11-23 CN CN201621259475.3U patent/CN206288991U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Single stage hot water driven horizontal pipe falling film evaporation device Granted publication date: 20170630 Pledgee: The Great Wall West Bank Bank of China Deyang hi tech branch Pledgor: DEYANG ZHONGJIA INDUSTRIAL INCORPORATED CO. Registration number: Y2024980001571 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |