CN102226498B - Expanded perlite hydrophobic system for liquefied natural gas (LNG) carrier - Google Patents
Expanded perlite hydrophobic system for liquefied natural gas (LNG) carrier Download PDFInfo
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- CN102226498B CN102226498B CN2011101436230A CN201110143623A CN102226498B CN 102226498 B CN102226498 B CN 102226498B CN 2011101436230 A CN2011101436230 A CN 2011101436230A CN 201110143623 A CN201110143623 A CN 201110143623A CN 102226498 B CN102226498 B CN 102226498B
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Abstract
The invention provides an expanded perlite hydrophobic system for a liquefied natural gas (LNG) carrier, belonging to the technical field of heat-insulating materials. The expanded perlite hydrophobic system is composed by two sets of parallel input devices and nozzles which are connected with the input devices, wherein the input device comprises a gate valve, a reducing valve, a Y-type filter, a pressure gauge, a proportioning pump, a hydrophobic agent liquid storage tank, a solution pump and a mixed liquid storage tank. According to the invention, an automatic control device is used to adjust the ratio of the hydrophobic agent mixed liquid and automatically control the flow, the injection speed and the atomizing degree of the hydrophobic agent mixed liquid, so that hydrophobic-type expanded perlite can be produced with stable and reliable quality and high output and can be widely applied to temperature zones. The expanded perlite hydrophobic system can not only satisfy the heat-conducting property of the hydrophobic-type expanded perlite for an LNG carrier, but also ensure the hydrophobic performance of the hydrophobic-type expanded perlite in the damp environment.
Description
Technical field
What the present invention relates to is the device of a kind of LNG Liquefied natural gas (LNG) thermoinsulation material technical field peculiar to vessel, specifically is a kind of liquid natural gas carrier expanded perlite hydrophobic system.
Background technique
Whether qualified the heat-insulating property of LNG ship cargo tank containment system structure and material be one of LNG ship important indicator.Heat-insulating property is LNG ship safe storage and the key of effectively transporting.Because the particularity of LNG ship has special requirement to thermoinsulation material.LNG ship temperature alternating scope in running is very big, and low temperature and normal temperature alternation cause LNG shipowner to want the stress rupture of equipment and auxiliary piping heat insulating construction easily.LNG captain navigates by water on the ocean phase, and humidity of the air is big, and common expanded perlite moisture absorption is strong, can't satisfy the service condition of LNG ship.Because the structure of LNG ship is special, the expanded perlite that is used as thermoinsulation material can't be sealed in the space of the sealing that completely cuts off fully with air.If expanded perlite sucks a large amount of moisture, the heat-insulating property of enclosed structure is worsened rapidly, directly influence the evaporation rate of LNG in the liquid tank, and the evaporation rate of LNG is the principal element that is related to transportation safety and conveying efficiency.Hydrophobic type expanded perlite cardinal principle is the film that can stop steam at the multiple one deck of the appearance bag of expanded perlite granule, makes water vapour can not get into the inside of expanded perlite, to guarantee the cold insulation effect of enclosed structure.
The hydrophobic type expanded perlite is a kind of based on LNG thermoinsulation material peculiar to vessel, both can guarantee to invade the stable of pearlite insulation performance because of moisture in the transportation process, can reduce the relative evaporation of LNG Liquefied natural gas again effectively.In the temperature range of its application (162 ℃ of normal temperature), promptly the low temperature side temperature is LNG Liquefied natural gas warm area (162 ℃), the thermoinsulation material of normal temperature side temperature for using under (45 ℃) condition.
Through the existing technology literature search is found that one Chinese patent application number 200410018499.5 disclosed " low temperature is with hydrophobic type expanded perlites and preparation method thereof " have been introduced a kind of hydrophobic expansion pearlite and preparation method thereof.Be that hydrophober forms the hydrophobic protective film and prepares on the expanded perlite surfaces coated.Hydrophober has adopted organic fatty class material, oily substance, especially adopts silicone oil, obtains even more ideal hydrophobic effect.This technology is mixed the process route that stirs then through preparation hydrophober thin up with expanded perlite, the consumption of hydrophober is reduced greatly.On production line, adopt continuous method production, spraying, drying and dehydrating is once accomplished, and simplifies technological process, reduces production costs, and guarantees quality of product.This invention product is mainly used in the thermoinsulation material in fields such as oxygenerator industry and low temperature heat-preserving equipment.Its structure and characteristic craft relative complex, output is lower, and the initial cost cost is higher relatively, is not suitable for the preparation of the very high and LNG hydrophobic type expanded perlite peculiar to vessel produced in enormous quantities of requirement quality.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that existing technology exists; A kind of liquid natural gas carrier expanded perlite hydrophobic system is provided; Through the proportioning of automatic control device adjustment hydrophober mixed solution, control flow, jet velocity, the fogging degree of hydrophober mixed solution automatically, produce stable, reliable; Output is high, is suitable for the wide hydrophobic type expanded perlite of warm area.Both guarantee to satisfy the heat-conducting property of LNG hydrophobic type expanded perlite peculiar to vessel, and can guarantee its hydrophobicity performance under wet environment again.
The present invention realizes through following technological scheme, the present invention includes: two groups the parallel connection input devices and be attached thereto the nozzle that connects.
Described input device comprises: gate valve, reduction valve, y-type filter, pressure gauge, dosing pump, hydrophober liquid container, solution pump and mixed solution liquid container; Wherein: gate valve, reduction valve, y-type filter, pressure gauge and dosing pump are connected successively; Two output terminals of dosing pump link to each other with the mixed solution liquid container with the hydrophober liquid container respectively, and the output terminal of mixed solution liquid container links to each other with nozzle with solution pump respectively.
Described hydrophober liquid container is processed by Austenitic Stainless Steel, is used for splendid attire hydrophober.
Described mixed solution liquid container is processed by austenite 304 stainless steels, and this mixed solution liquid container top cover plate is provided with hydrophober inlet and deionized water inlet, the mixed solution of splendid attire hydrophober and deionized water in the liquid container.
Be provided with the stirring pump in the described mixed solution liquid container, this stirs pump is made up of motor and agitator arm, is fixed on the upper inside wall of mixed solution liquid container, is used to stir the mixed solution of hydrophober and deionized water, stirs with assurance, can not cause the mixed solution layering.
Be provided with liquid level sensor in the described mixed solution liquid container, this liquid level sensor is used to measure the liquid level of hydrophober mixed solution, and analogue signal is delivered to control cabinet, confirms the liquid level of mixed solution through the software of exploitation.
Be provided with safety check between described dosing pump and the mixed solution liquid container, be used to prevent the reverse flow of hydrophober mixed solution, guarantee that mixed solution can only flow along the direction of pump discharge.
Described nozzle is atomized into drop with on the surface that is sprayed at expanded perlite granule with the hydrophober mixture.
The present invention carries out work in the following manner: deionized water passes through gate valve; Reduction valve; Y-type filter and hydrophober are in dosing pump; Proportioning charges in the first mixed solution liquid container and the second mixed solution liquid container according to a certain percentage, and pump is stirred on first of the first mixed solution liquid container and the second mixed solution liquid container top and the second stirring pump stirs through being installed in, and controls the switching of two parallel pipelines through the height of liquid level sensor judgement liquid level; When guaranteeing a pipe-line system job, another one is mixed and is stirred.The power that provides through solution pump again; Make hydrophober mixed solution flow through respectively stop valve, safety check, solution pump, y-type filter, flowmeter, pressure transmitter, solenoid valve and nozzle; Adjust the frequency of pump motor through the signal of flowmeter and pressure transmitter; And then the flow and the pressure of adjustment hydrophober mixed solution, again mixed solution is sent to nozzle, be injected in the expanded perlite of about 450 ℃ of expansion furnace outlets; Carry out the hydrophobic process, the moisture in the mixed solution is through the heat of vaporization of expanded perlite self.
Compared with prior art; The invention has the beneficial effects as follows: can be used for liquid nitrogen temperature (196 ℃); Especially LNG hydrophobic type expanded perlite peculiar to vessel; The passing ratio pump is controlled the proportioning ratio of hydrophober and deionized water automatically, through the flow and the outlet pressure of electrical signal automatic controller regulation and control hydrophober mixed solution, and then the effect of the direction that sprays into of control nozzle, angle, atomizing and spray into the amount of hydrophober mixed solution.The hydrophober mixed solution is directly injected to about 400-450 ℃ expanded perlite coming out from expansion furnace, and the heat through expanded perlite self is with the water evaporation in the mixed solution.Both guarantee the effect of expanded perlite hydrophobic, guaranteed the simplification of hydrophobic type expanded perlite production technology again.Improved the output of hydrophobic type expanded perlite.Adopt automatic control system to guarantee that whole hydrophobic device can safety, stable, operation reliably.Need not be again expanded perlite be immersed in the hydrophober mixed solution, dries processing again, improved the productivity of product greatly according in the past technology.
Description of drawings
Fig. 1 is apparatus of the present invention schematic representation.
Wherein: 1 gate valve, 2 reduction valve, 3Y type filter, 4 pressure gauges, 5 dosing pumps, 6 hydrophober liquid containers, 7 mixed solution liquid containers, 8 solution pumps, 9 nozzles.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technological scheme of the present invention.
As shown in Figure 1, present embodiment comprises: two groups the parallel connection input devices and be attached thereto the nozzle that connects.
Described input device comprises: gate valve, reduction valve, y-type filter, pressure gauge, dosing pump, hydrophober liquid container, solution pump and mixed solution liquid container; Wherein: gate valve, reduction valve, y-type filter, pressure gauge and dosing pump are connected successively; Two output terminals of dosing pump link to each other with the mixed solution liquid container with the hydrophober liquid container respectively, and the output terminal of mixed solution liquid container links to each other with nozzle with solution pump respectively.
Described hydrophober liquid container is processed by Austenitic Stainless Steel, is used for splendid attire hydrophober.
Described mixed solution liquid container is processed by austenite 304 stainless steels, and this mixed solution liquid container top cover plate is provided with hydrophober inlet and deionized water inlet, the mixed solution of splendid attire hydrophober and deionized water in the liquid container.
Be provided with the stirring pump in the described mixed solution liquid container, this stirs pump is made up of motor and agitator arm, is fixed on the upper inside wall of mixed solution liquid container, is used to stir the mixed solution of hydrophober and deionized water, stirs with assurance, can not cause the mixed solution layering.
Be provided with liquid level sensor in the described mixed solution liquid container, this liquid level sensor is used to measure the liquid level of hydrophober mixed solution, and analogue signal is delivered to control cabinet, confirms the liquid level of mixed solution through the software of exploitation.
Be provided with safety check between described dosing pump and the mixed solution liquid container, be used to prevent the reverse flow of hydrophober mixed solution, guarantee that mixed solution can only flow along the direction of pump discharge.
Described nozzle is atomized into drop with on the surface that is sprayed at expanded perlite granule with the hydrophober mixture.
The present embodiment working procedure: with hydrophober and deionized water passing ratio pump according to the ratio proportioning that is provided with; Be transported in the liquid container; And stir through the stirring pump on liquid container top, carry the hydrophober mixed solution through the power that solution pump provides, the signal that feeds back according to flowmeter on the pipeline and pressure transmitter; The frequency of adjustment solution pump is adjusted to optimum value until flow and pressure in real time; The hydrophober mixed solution that mixes is sprayed into through the nozzle that is fixed on the expansion furnace, the position of nozzle can be according to the temperature adjustment position of expanded perlite in the expansion furnace, to spray in the optimum temperature of perlite again.
The concrete advantage of present embodiment: the device that can carry out hydrophobic has continuously been adopted in (1), can be according to the output adjustment straying quatity of different expanded perlites, the output that improves greatly.Compare with the method for dipping, simplified technology, improved output, improved the utilization ratio of hydrophober mixed solution.(2) employing is adjusted the frequency of solution pump automatically according to the signal of flow and pressure, guarantees to spray into the hydrophober mixture at optimum flow and pressure.(3) adopted a cover automatic mixing hydrophober mixed solution device,,, reduced the error that artificial proportioning causes according to the different ratio adjustment hydrophober and the mixed solution of deionized water according to dosing pump.(4) adopted the program of software programming, the automatic control of parameter realizes through software, has both reduced the error that hand-guided brings, and has guaranteed the optimum efficiency of hydrophobic again.(5) adopted solenoid valve, y-type filter, pressure transducer guarantee the stable operation of security of system.
Claims (6)
1. a liquid natural gas carrier expanded perlite hydrophobic system is characterized in that, by the input devices of two groups of parallel connections and be attached thereto the nozzle that connects and form;
Described input device comprises: gate valve, reduction valve, y-type filter, pressure gauge, dosing pump, hydrophober liquid container, solution pump and mixed solution liquid container; Wherein: gate valve, reduction valve, y-type filter, pressure gauge and dosing pump are connected successively; Two output terminals of dosing pump link to each other with the mixed solution liquid container with the hydrophober liquid container respectively, and the output terminal of mixed solution liquid container links to each other with nozzle with solution pump respectively.
2. liquid natural gas carrier expanded perlite hydrophobic according to claim 1 system is characterized in that described hydrophober liquid container is processed by Austenitic Stainless Steel.
3. liquid natural gas carrier expanded perlite hydrophobic according to claim 1 system; It is characterized in that; Described mixed solution liquid container is processed by austenite 304 stainless steels; This mixed solution liquid container top cover plate is provided with hydrophober inlet and deionized water inlet, the mixed solution of splendid attire hydrophober and deionized water in the liquid container.
4. liquid natural gas carrier expanded perlite hydrophobic according to claim 1 system; It is characterized in that, be provided with the stirring pump in the described mixed solution liquid container, this stirs pump and is made up of motor and agitator arm; Be fixed on the upper inside wall of mixed solution liquid container; Be used to stir the mixed solution of hydrophober and deionized water, stir, can not cause the mixed solution layering with assurance.
5. liquid natural gas carrier expanded perlite hydrophobic according to claim 1 system; It is characterized in that; Be provided with safety check between described dosing pump and the mixed solution liquid container, be used to prevent the reverse flow of hydrophober mixed solution, guarantee that mixed solution can only flow along the direction of pump discharge.
6. liquid natural gas carrier expanded perlite hydrophobic according to claim 1 system is characterized in that described nozzle is atomized into drop with on the surface that is sprayed at expanded perlite granule with the hydrophober mixture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101436230A CN102226498B (en) | 2011-05-31 | 2011-05-31 | Expanded perlite hydrophobic system for liquefied natural gas (LNG) carrier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101436230A CN102226498B (en) | 2011-05-31 | 2011-05-31 | Expanded perlite hydrophobic system for liquefied natural gas (LNG) carrier |
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| CN102226498A CN102226498A (en) | 2011-10-26 |
| CN102226498B true CN102226498B (en) | 2012-07-25 |
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Citations (6)
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|---|---|---|---|---|
| US4525388A (en) * | 1983-12-23 | 1985-06-25 | Usg Corporation | Process for expanding and coating perlite |
| US4889747A (en) * | 1988-05-02 | 1989-12-26 | Pcr, Inc. | Hydrophobic expanded perlite compositions and process for preparing the same |
| SU1669887A1 (en) * | 1985-11-29 | 1991-08-15 | Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Process for making hydrophobic expanded pearlite |
| CN1579985A (en) * | 2004-05-20 | 2005-02-16 | 上海宝能轻质材料有限公司 | Hydrophobic expanded pearlite for low temperature and its preparing method |
| CN1583642A (en) * | 2004-06-03 | 2005-02-23 | 上海宝能轻质材料有限公司 | Manufacturing process for low-temperature hydrophobic expanded pearlite |
| CN101891441A (en) * | 2009-05-21 | 2010-11-24 | 浙江阿斯克新型保温材料有限公司 | Production process for hydrophobic expansion pearlite thermal insulation product |
-
2011
- 2011-05-31 CN CN2011101436230A patent/CN102226498B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525388A (en) * | 1983-12-23 | 1985-06-25 | Usg Corporation | Process for expanding and coating perlite |
| SU1669887A1 (en) * | 1985-11-29 | 1991-08-15 | Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Process for making hydrophobic expanded pearlite |
| US4889747A (en) * | 1988-05-02 | 1989-12-26 | Pcr, Inc. | Hydrophobic expanded perlite compositions and process for preparing the same |
| CN1579985A (en) * | 2004-05-20 | 2005-02-16 | 上海宝能轻质材料有限公司 | Hydrophobic expanded pearlite for low temperature and its preparing method |
| CN1583642A (en) * | 2004-06-03 | 2005-02-23 | 上海宝能轻质材料有限公司 | Manufacturing process for low-temperature hydrophobic expanded pearlite |
| CN101891441A (en) * | 2009-05-21 | 2010-11-24 | 浙江阿斯克新型保温材料有限公司 | Production process for hydrophobic expansion pearlite thermal insulation product |
Non-Patent Citations (2)
| Title |
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| 孙顺杰等.憎水型膨胀珍珠岩制备过程中吸水率影响因素探讨.《化学建材》.2008,第24卷(第5期),32-33. * |
| 陶吉林等.低温用憎水膨胀珍珠岩(珠光砂)的性能与应用.《深冷技术》.2005,(第2期),34-36. * |
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Granted publication date: 20120725 Termination date: 20190531 |