High Temperature Overflow Small Bath Ratio Dyeing Machine Boosts Energy Saving And Emission Reduction Of Printing And Dyeing Industry

2012 China Printing and dyeing industry The Association has selected the Sixth Recommended Catalogue of Advanced Technologies for Energy Saving and Emission Reduction in China's Printing and Dyeing Industry. In this issue, we will publish the "TEC Series High Temperature Overflow Small Bath Ratio Dyeing Machine" project of Lixin Dyeing and Finishing Machinery (Shenzhen) Co., Ltd., hoping that enterprises will actively adopt advanced technologies for energy conservation and emission reduction to improve their cleaner production level.

　　 Introduction to technical content

TEC series high temperature overflow small bath ratio dyeing machine consists of a cylinder, a cloth guide head, which is set at the front end of the cylinder. The cloth guide head includes a straight cylinder type single tube and a door cover with two troughs at both ends. The cylinder is equipped with two troughs and a filter trough plate. The first isolation plate is set between the two troughs in the straight cylinder type single tube to prevent mutual interference, A second isolation plate is arranged between the two grooves arranged in the cylinder, and the door cover is respectively provided with an openable door connected with the two grooves arranged in the straight cylinder single pipe. Through the structure of "one tube and two grooves" of the whole machine, dual dyeing production can be carried out at the same time. Due to the anti interference isolation plate and the respective openable operation door, they can be operated separately in the dyeing process. At the same time, the water storage chamber below the cylinder is shared by two tanks, so water resources are saved, the bath ratio is reduced to below 1:6, energy consumption is reduced, and environmental protection is beneficial.

　 Fundamentals

This equipment combines the characteristics of L-type high temperature and high pressure dyeing machine and O-type high temperature and high pressure dyeing machine to design a new type of dyeing nozzle. This nozzle can not only provide enough dye solution for the fabric during dyeing, but also provide the power for the fabric to unfold during the fabric operation, so that the fabric can be fully unfolded and constantly shifted while running at high speed in rope shape, Release its internal stress, so as to minimize color creases and dyeing. The carrying capacity of JUMBOTEC high-temperature dyeing is 300 kg per tube. This is incomparable with other dyeing machines.

In terms of dyeing process of cotton, the process of adding salt depends on Textile And color sensitivity. Generally speaking, the salt adding process can be divided into salt adding before dye adding (salt injection process first) and salt adding after dye injection (post salt process). The former is suitable for dark products and salt insensitive colors, and salt can be quickly injected in solid form; The latter is suitable for light medium color and sensitive color, and salt needs to be injected into the dye solution quantitatively for circulation. The former dyeing machine always dissolved the salt first and then injected it slowly when quantitatively injecting salt, which takes a certain time and affects the efficiency. For the first time, the TEC series equipment has added the function of overflow salt on the ration bucket, which can achieve the optimal dyeing result and increase economic benefits in combination with the ration injection on the equipment, the main cylinder reflux function, the circulation mixing function, the direct steam heating function and the injection at 105 ℃.

　　 Technological innovation

Staining cotton The existence of impurities such as cotton scraps has a great impact on dyeing, such as color streaks. The appearance of cotton chips during dyeing makes dyeing and finishing equipment manufacturers take into account the collection and discharge of wool chips. The traditional screen filter has the following disadvantages: it is difficult to clean the filter screen; The filter screen is easily blocked by debris; The nozzle pressure is unstable and easy to drop, which makes the dyeing process difficult to control and affects the product quality; Shutdown and cleaning will affect production efficiency.

In view of the above problems, the newly developed wool chip collector of Lixin Dyeing and Finishing Machinery Co., Ltd., instead of the old screen filter, can achieve the collection, stacking and automatic discharge functions of wool chips. The short wool chips generated when the fabric is running will flow into the wool chip collector together with the dye liquor. Its unique structure can effectively collect the wool chips from the dye liquor flow, It can also stack the broken wool in a specific space, and its automatic discharge function can completely remove the broken wool.

Through the new design and comprehensive understanding of the function, the wool crusher collector will work all the time during the whole dyeing process. The wool crushing collector is in operation during the whole dyeing process: it will not cause instability/pressure drop of nozzle pressure caused by filter blockage, which will affect dyeing quality; There is no need to shut down the machine to clean the filter, reducing the process time and increasing the production efficiency; Don't be tired of cleaning up, and save the labor of operators.

X-Y folding and cloth discharging device is adopted, which can discharge cloth from front to back, from left to right, and fully automatically swing in both directions (longitudinal and transverse) to realize highly automatic cloth discharging. The cloth can be delivered from multiple pipes at the same time. The folding bucket makes the cloth folded neatly on the cloth carrier. The lateral swing of the pneumatic device can fully fill the width of the cloth carrier, reduce the labor force of the operator and save the cloth delivery time. At the same time, it can also be used with the long cloth carrier.

　　 Scope of application

Suitable for 50g/m~800g/m chemical fiber , pure cotton, super fiber, mixed spin It can also achieve satisfactory dyeing effect for the raised decorative cloth of about 800g/m.

Energy saving and emission reduction effect

The vertical high-efficiency low consumption heat exchanger provides the maximum temperature rise rate, which is conducive to the discharge of dye liquor and condensate, avoiding the formation of scale, extending the service life, and reducing heat loss and waste. It is also used as a part of the dyeing liquor circulation throat and as a function of temperature rise and fall of the dyeing liquor. It does not store water itself. Reasonable optimization of the structure is helpful to reduce the bath ratio. The vertical layout can drain the condensate and dyeing liquor in real time, reducing the time consumed for cold and hot conversion; At the same time, avoid scale formation, prolong the service life of heat exchanger and reduce heat loss and waste; Save time and energy.

Energy consumption report is added to the system to provide real or estimated energy consumption statistical report, including water and electricity consumption and cost estimation. At the same time, the system also has powerful water ratio calculation and water withholding functions. According to the water ratio and water content distribution required in different stages of batch parameter setting, when compiling the master cylinder metering water inlet and MST water inlet functions, Multiple water ratio calculation values can be selected, such as dry cloth water ratio during cloth boiling, wet cloth water inflow during cloth boiling, wet cloth water inflow during dyeing, post-treatment wet cloth water inflow, MST pre water inflow before cloth feeding, and master cylinder water supplement before cloth feeding; It can also include the fresh water that needs to be deducted in advance from the bucket step; This function greatly facilitates programming and improves the versatility of dyeing programs.

With the new design method, the bath ratio can reach 4.2~4.5 under full load, compared with 8~10 of the general overflow machine, which saves steam, water and additives, shortens the process time, reduces the cost of sewage treatment, and thus helps enterprises achieve energy conservation and emission reduction.