Solvent process: all staff should be familiar with the process of tetrachlorethylene woking in the facilities of dry cleaning in order to use it safely. As shown in the figure 3.2, terachlorethylene firstly flows into a drum from a container and then flows back into the container after being filtered, which makes the process of cleaning circulate. Cleaning methods ①the operation of dry cleaning machine First, control the drum to rotate backward and forward. Second, control the drum to rotate backward and forward; raise the temperature of cleaning mixture without going through radiator, whose process is as the following: drum→button trap→pump→liquid-watching window→drum. Third, control the drum to rotate backward and forward; lower the temperature of cleaning mixture through radiator. ②three methods of dry cleaning: First, simple dry cleaning: used under the circumstance that some auxiliary is added to the solvent of dry cleaning, which is used to clean some less contaminated clothes. Figure 3.2 flow chart of tetrachlorethylene Second, a second dry cleaning: add auxiliary into the dry-cleaning solvent for the first washing. After two or three minutes, recycle the solvent through button trap into a container for a simple dehydration. Then the solvent is going to be pumped from a tank of cleaning solvent into the drum for a second washing. (this is the process of rinsing rather than the cycle of washing). Third, dry cleaning with auxiliary: auxiliary is added into solvent during this process, in which filtering and circulating function. In general, after dry cleaning with auxiliary, a second dry cleaning is demanded. ③Washing time (illustrated in figure 3.4, for reference). Figure 3.4 washing time table
Clothing types
Normal
White
Woolen、overcoat
Silk、cashmere
Nap、wrinkles
Real leather and fur
Washing time/min
10~20
5~10
10~20
5~10
4~8
8~15
④Dehydration time (illustrated in figure 3.5, for reference).
Figure 3.5 Dwatering time table
Clothing types
Normal
White
Woolen、overcoat
Silk、cashmere
Nap、wrinkles
Real leather and fur
Dehydration time/min
2.5
2.5
3
2
2.5
1.5
⑤Drying temperature (illustrated in figure 3.6, for reference). Figure 3.6 Drying temperature
Clothing types
Normal
White
Woolen、overcoat
Silk、cashmere
Nap、wrinkles
Real leather and fur
Drying temperature/℃
48~52
48~50
48~50
45~48
46~59
42~45
About the facility configuration ①Since the facility configuration changes, please refer to the random instruction according to your own configuration. To the same part between the facility to be configured and that in training center, we will train locally. To the different part, we will offer training at your home. ②Attentions to using dry-cleaning machine First, dry-cleaning machine should be installed in a room where is ventilated, dry, no flammable stuff and corrosive gases. If it is not well-ventilated, ventilation should be installed. Since machine should be kept level, hard rubber and cardboard can be used as an underlay under its four legs. Besides, there should be space of 0.8 meters to 1 meter between the back of machine and wall for easy operation. Electric circuit should be connected according to national standard. Especially the bolt of machine with earthing marks must connect with reliable protective earthing. Meanwhile, resistance is no more than 4 ohms and wire is no less than 2.5 square millimeters. Second, working room should be well-ventilated. Third, no flames are allowed. Fourth, electric circuit must be installed by professional electricians, and the bolt of machine with earthing marks must connect with reliable protective earthing. Fifth, amateurs are forbidden to alter any parameters. Sixth, please turn off the power at off-duty time. ③Maintenance of facility First, check the oil, screws and noises during its operation. Turn off the machine for any abnormality. Reuse will not be allowed until malfunctions are all excluded. Second, lubricating oil in guide bearings and transmission should be added and replaced to ensure good lubricating performance. Third, check conveyor belt frequently. If it becomes loose, keep it tight. Fourth, To do a thorough check on the machine every year, and make a necessary repair based on concrete situation. Finally, consumers should pay attention: please keep machine and workplace clean. Favorable environment is good for not only machine performance but also attracting consumers. (IV) Washing Washing is a process, in which washings are acted on by the chemical power of detergent and the mechanical power of washing machine, and the effect is up to the organic combination between the surface force in detergent and the friction force by washing machine’s operating. 1. principle and basic knowledge of washing (1) in general, two washing tools: semi-automatic washing machine; full-automatic washing machine. ①Semi-automatic washing machine. Semi-automatic washing machine is usually made up of washing drum and dehydrating drum, which can automatically finish washing and rinsing in sequence except for dehydration. After washing and rinsing, washings should be put into dehydrating drum for timing dehydration. ②Full-automatic washing machine. Procedures which are chosen in advance with control key in necessary place are set washing, rinsing, dehydrating, watering, draining and drying automatically. (2)washing conditions ①Water. Washing mainly depends on water, and there are “soft” water and “hard” water, which are different in the number of soluble metal ions in water, such as iron,calcium andmagnesium. Water with more metal ions is “hard”, or it is “soft”. However, there are many standards in the world to differentiate them. Our country usually use Germany Hardness Standard in which one hardness means that there are 1mg CaO in 100mg water. Hardness less than five is “soft”, or it is “hard”. Water in the north China is generally “hard”. Washing with “hard” water is not only wasting detergent but also having effects on washing. ②Water temperature. Temperature is one of the main washing conditions and it has an important effect on washing. The followings are its functions: First, detergent (especially soap) can solute fast into foam in some temperature of water, in which detergent molecule is strongly active so that its function can be fully brought into play. Second, fiber expands when it is heated, which is good for clearing up dirt. Fiber can expand by wetting, and to some degree, it stops expanding. If temperature can up to some degree, fiber can keep on expanding to its maximum.
A Stainless steel ss304 drying drum B Stainless steel ss304 heat radiator C With big door to do loading and unloading D With Durable structure E With fast drying speed that 30 minutes for towel and 20 minutes for towels
Pass Through Washing (with inbuilt High Speed Extraction) of all types of Hospital Linen with a partition between contaminated linen area and clean linen area
Barrier Washer Barrier washer separates laundry room into two isolated zones , clean zone and unclean zone. The linen to be washed is loaded into the machine from unclean zone and the washed linen is unloaded from the clean zone so as to avoid cross contamination caused by one door in-out. It is an ideal washing equipment for hospital and hygienic laundries.
Industrial drying machine is a kind of equipment that is dried by hot air, which can dry wool, cotton clothes, bed sheets and quilt covers
1. It adopts computer automatic control, and can configure different drying temperature and drying time according to drying requirements to realize automatic drying.
2 The inner drum is made of bright stainless steel with excellent heat resistance, the inner wall is smooth, and the wear of clothes is reduced
3 Equipped with a high-efficiency radiator and a reasonable air duct, so that the hot air directly contacts the clothes, which greatly improves the drying efficiency and saves energy.
4 There are various models such as external steam radiator or electric heating radiator, or natural gas radiator to choose from
