Brief Introduction to Renhe Cleaning Shanghai Co.,
Ltd.
Renhe Cleaning
Shanghai Co., Ltd., founded in 1998, is a professional company specially
dealing with the dismantlement-free cleaning of engine room equipment on
shipboard. For the past years, the Company has always hammered away at the
researches and practices of technologies for dismantlement-free cleaning of engine
room equipment on shipboard, and obtained plentiful scientific research
achievements and practical experiences. At present, the Company has developed
RH series cleaning technology with unique advantage. The technology is featured
by high cleaning efficiency, innocuity, corrosion free, and short construction
period, etc.; and has solved a series of troublesome and difficult problems
such as that ship equipment must be disassembled, lifted, out of compartment,
and dismantled, etc. for cleaning.
So far, the
Company has updated its self-possessed dismantlement-free cleaning process and
detergent formula to the fourth generation; applied this technology to clean
over 1,000 ships (times) and over 10,000 sets (pieces) of engine room equipment
of China and foreign countries; has been well received by each party in the
ship circle; and solved many important, urgent and difficult problems for ship
owners.
To meet the
demand of shipping industry, the Company has cooperated with scientific
research units, spent nearly three years in researching and developing
practical and high-efficiency special cleaning equipment --- RH8060A cold-hot dual-temperature high-pressure cleaning machine, and up to this point, closed the pattern that there was no special cleaning equipment for dismantlement-free
cleaning of engine room equipment on shipboard, greatly enhanced the Company¡¯s
engineering quality and work efficiency, and made it possible to provide
self-service and long-range technical cooperation services for customers. The
Company has explored a feasible way to help customers reduce cleaning cost and
independently arrange cleaning engineering, etc.
Renhe Cleaning
Shanghai Co., Ltd. has always persisted in the tenet of implementing
high-quality engineering and setting customers¡¯ heart at rest.
The Company
promises to deliver work higher than national standard, and to not deliver work
or collect fees in case of being out of standard.
Service items
I. Cleaning
Construction Service
According to
customers¡¯ entrustment, the Company¡¯s construction personnel execute cleaning
construction. Construction items are as shown below:
1. Full
dissolution and cleaning of scale in cooling water jacket of main engine and
donkey engine;
2. Overall
in-situ full dissolution and cleaning of oil, dust and dirt on gas surface, and
scale at seawater side of air cooler;
3. Full
dissolution and cleaning of scale on freshwater surface and vapour surface,
seawater scale and marine growth scale on seawater surface of freshwater
cooler, piston water cooler, and Kangting raw and warming-up water
heater;
4. Full
dissolution and cleaning of oil sludge on oil surface and seawater scale on seawater
side of oil head cooler, lubricating oil cooler, and camshaft cooler;
5. Overall
dismantlement-free cleaning of oil sludge on the oil side and scale on the
vapour side of fuel pulverization heater, and fuel heating coil, etc.;
6. Dismantlement-free
cleaning of fresh water generator;
7. Cleaning of
scale inside boiler pipe or jacket, such as incense coil, snake-shaped coil,
finned flexible pipe, vertical cross water pipe, and horizontal fire tube,
etc.;
8. Descaling and
cleaning of seawater pipeline system;
9. Cleaning of
scale in cooling water cavity of supercharger;
10. Cleaning of
bilge in the filtering core of fuel oil filter;
11. Systematic
cleaning of ice machine system, compressor system, air conditioning system, and
lubricating oil system;
12. Cleaning
with special technologies of thoroughly-blocked valve body, valve seat, and oil
injector at cylinder head, etc.
II.
Customers¡¯ Self-support and Long-distance Technical Cooperation Services
Upon the request
of customers, the Company could provide customers with special equipment and
detergent for cleaning of corresponding ships, carry out training about
cleaning techniques for related construction personnel designated by customers,
and then, trainees complete cleaning tasks independently. If required by
customers, our Company could dispatch technical personnel to provide technical
collaboration and assist customers with construction for fee. The equipment and
detergents that our Company could provide are as shown below:
1. RH8060A cold-hot dual-temperature high-pressure cleaning machine (see the Specification of RH8060A Cold-hot Dual-temperature High-pressure Cleaning Machine for details);
2. RH90A cold-hot dual-temperature circulating cleaning machine (see the Specification of RH90A Cold-hot Dual-temperature Circulating Cleaning Machine for details);
3. RH-YW-90
detergent (see the Directions for Use of RH-YW-90 Detergent for details);
4. RH-SH-60
detergent (see the Directions for Use of RH-SH-60 Detergent for details);
III. Plate
Heat Exchanger (see the Brief Introduction to the Service of Plate Heat
Exchanger for details)
1. Overall dismantlement-free cleaning: being suitable for
navigation repair, corrosion-free, short construction period, and good effect;
2. Overhaul inspection and gasket replacement: Provide gasket in
time;
3. Plate replacement and reshaping: Provide single plates of various
materials, and repair deformed plates;
4. Provide assembly of plate heat exchanger: Timely supply of goods,
quality guarantee, and customization according to demands.
This machine is a special high-pressure dual-temperature cleaning
device for engine room equipment on shipboard in some certain environmental
conditions, and is applicable to the cleaning of oil sludge and dirt from the
fins of air cooler, the core of tubular cooler, the surface of equipment,
compartment board and various spare parts.
Performance
Characteristics
Electric heating without direct fire, stable operating pressure,
small volume, light weight, and convenient movement; completely stainless steel
shell convenient for scrubbing; open-type dual doors convenient for overhauling;
simple operation, safety and reliability.
Note: The machine could be used in an
intermittent way when the power supply is 440V; the theoretical instantaneous
temperature rise is 60¡ãC£®
Specification of RH90A Cold-hot Dual-temperature Circulating Cleaning Machine
Scope of
Application
This machine is a special dual-temperature circulating cleaning
device for engine room equipment on shipboard in some certain environmental
conditions, and is applicable to the circulating cleaning of various engine
room equipment, such as the cleaning of oil sludge and scale of plate heat
exchanger, shell-and-tube heat exchanger, and air cooler, etc.
Performance
Characteristics
Electric heating without direct fire, small volume, light weight,
and convenient movement; high-temperature-resisting circulating pump, high-tech
sealing structure, and leakage free; automatic temperature control, and stable
heating; completely stainless steel shell convenient for scrubbing; open-type
overhauling doors convenient for overhauling; simple operation, safety and
reliability.
Directions for Use of RH-YW-90 (RH-YY-90)
Detergent
RH-YW-90
detergent is applicable to the spray cleaning of the oil, dust and dirt, and
oil sludge at the gas side of air cooler, the oil side of oil cooler and oil
heater, and the oil sludge on the surface of equipment on ships.
RH-YY-90
detergent is applicable to the dipping and circulating cleaning of the oil,
dust and dirt, and oil sludge at the gas side of air cooler, the oil side of
oil cooler and oil heater, and the oil sludge on the surface of equipment
on ships.
The optimal
work temperature of RH-YW-90 (RH-YY-90) detergent shall be 85-90¡æ. Working liquid may be heated by means of electric heating and vapour heating, etc. In case of vapour heating, it¡¯s necessary to consider the possibility that
the moisture carried over in vapour heating is infused to working liquid and
thus reduces the concentration of working liquid, so the concentration of
working liquid shall be enhanced properly.
For the sake of
convenient transport and storage, RH-YW-90 (RH-YY-90) detergent in original
package shall be high-concentration mother liquor, which shall be diluted with
9-14 times of water and prepared into working liquid in service. In
preparation, the mixture shall be sufficiently stirred to ensure even
concentration.
After RH-YW-90
(RH-YY-90) detergent is prepared into working liquid, it¡¯s possible to clean
equipment with corresponding cleaning methods. The cleaning time shall be
determined according to equipment and scale thickness, etc. After ending of
cleaning, it¡¯s necessary to rinse the equipment with plentiful clean water,
till that the equipment become clean.
RH-YW-90
(RH-YY-90) detergent shall not be used to clean equipment made of aluminum
materials. In case there are aluminum fittings on
some equipment, such equipment shall not be cleaned until such aluminum
fittings are taken off. RH-YW-90 (RH-YY-90) detergent will produce air bubbles
directly after contacting aluminum, and the higher the temperature is, the more
drastic the reaction will be. In case such phenomenon is discovered in cleaning
process, it¡¯s necessary to stop cleaning at once, infuse clean water and drain
working liquid simultaneously, until taking out aluminum parts before
continuing cleaning.
Directions for Use of RH-SH-60 Detergent
RH-SH-60
detergent is applicable to the descaling and cleaning of common scale in
various equipment and pipelines.
The working
temperature of RH-SH-60 detergent must be below60¡æ. For the sake of convenient transport and storage, RH-SH-60 detergent in original package is high-temperature powder, which shall be diluted with 13
times of water and prepared into working liquid in service. In preparation, the
mixture shall be sufficiently stirred to ensure even concentration.
After RH-SH-60
detergent is prepared into working liquid, it is possible to clean equipment by
means of sprinkling, dipping and circulating, etc. The cleaning time shall be
determined according to equipment and scale thickness, etc. After ending of
cleaning, it¡¯s necessary to rinse the equipment with plentiful clean water,
till that the equipment become clean.
Warning: RH-SH-60 detergent shall not be dipped and circulated in closed
type but surely in open type, since it could discharge gases sufficiently. It¡¯s
necessary to wear working clothes and acid- and alkali-resistant gloves in the
preparation of detergents.
Brief Introduction to the Service of Plate Heat
Exchanger
Plate heat
exchanger has been widely applied to the oil/ water cooling and heating, etc.
of marine main engine and donkey engine for its small volume and
high-efficiency heat exchange. However, plate heat exchanger is of high price
and precise structure, so the repair, fitting replacement, complete-machine
replacement of plate heat exchanger are not only highly expensive, but also
greatly difficult and strongly professional. Insufficient preparations will
make it impossible to repair equipment as planned, even damage and destroy the
equipment, and directly affect the normal operation of ships.
At present, the replacement
of fittings and complete machine of plate heat exchanger basically gives
priority to one or two imported products; the maintenance is also undertaken by
the offices of overseas manufacturers in China. It not only takes high expenses
and long period, but also makes users relatively passive in the process. Users
have small space of choice, and their demands could not be well guaranteed.
Whereas this
situation, our Company has combined our own advantages and characteristics,
formed a complete set of perfect service system in terms of the repair,
fittings replacement, and complete-machine replacement, etc. of plate heat
exchanger after long-term exploration and practices, and could provide users
with high-efficiency, convenient, safe and top-quality services.
The
maintenance of plate heat exchanger mainly includes overhaul inspection,
cleaning, and plate reshaping. After some time of use, plate heat exchanger
will have such problems as blockage of interval channel, degradation of heat
exchange performance, leakage, and even deformation and damage of plates, etc.
Therefore, overhaul inspection and cleaning shall be conducted periodically,
and if necessary, plates shall be reshaped and replaced. These maintenance
works must be completed by personnel with mature professional techniques and
abundant work experiences.
Renhe Cleaning
Shanghai Co., Ltd., since being established in 1998, has always hammered away
at the research and construction practices of techniques for cleaning of engine
room equipment on shipboard. Up till now, the Company has completed the
cleaning engineering of over 1,000 ships, and upgraded its cleaning techniques
comprehensively for four times. In this process, the Company has carried out
deep-going researches and practices about the cleaning of plate heat exchanger
for multiple times; formed a set of dismantlement-free cleaning techniques;
realized high efficiency, safety, corrosion free, and short construction
period; greatly satisfied the demands in the cleaning market of marine plate
heat exchanger. In 2005, the Company continuously conducted technical
cooperation with multiple domestic manufacturers of plate heat exchanger, and
from therein, the Company has commanded a complete set of maintenance
techniques, cultivated a batch of technical employees with abundant construction
experiences, and could provide replacement services of complete machine and
fittings for users.
So far, the Company has completed the
maintenance and replacement services of over 400 plate heat exchangers, has
saved plentiful capital and time for users, and has been well received by
users.
Service Scope
1. Overall dismantlement-free cleaning: being suitable for
navigation repair, corrosion-free, short construction period, and good effect;
2. Overhaul inspection and gasket replacement: Provide gasket in
time;
3. Plate replacement and reshaping: Provide single plates of various
materials, and repair deformed plates;
4. Provide assembly of plate heat exchanger: Timely supply of goods,
quality guarantee, and customization according to demands.
