The wet sludge is dried by the drying machine of Shincci in a closed cabinet. The dryer has only three interfaces connected to the external, namely the feed inlet, the discharge outlet and the condensate discharge outlet. These three places are all sealed with material or water. There is almost no exhaust gas leakage during the whole drying process, but it is undeniable that a very small amount of internal gas will leak, but the concentration of pollutants is low, far below the national air emission standards; we can supply appendix third-party test reports.

1.First of all, the formation of sludge is very important. It’s a effective method to control and reduce the generation of dust from the source, so as to prevent dust from entering the core inner system. The dust filter of our company's products has two layers of protection, the filter and the filter belt to reduce the dust entering the system. Therefore, the heat exchanger touches very little dust.

2. The material of the heat exchanger is copper-nickel alloy, and the grade is relatively high B30. The corrosion resistance itself is far superior to stainless steel, including 316L. At the same time, a layer of epoxy resin is electrophoresed on the material for double protection.

3. These problems can only reduce the corrosivity, and the daily maintenance of the equipment also needs to be guaranteed. The radiator can be cleaned and maintained once a month in a well-formed, dust-less site. Shincci designs the radiator to the outside, which can be cleaned as soon as the panel is opened, which is convenient for maintenance.

4. Therefore, such a multifaceted improvement can truly solve the anti-corrosion problem. Take Sembcorp Lianyungang as an example. The chloride ion of nearly 2000 has been running for a whole year. If it is really corroded, problems will occur in a few months.

Shincci dryer adopts warm air direct drying method. In the process of drying sludge, some low-boiling pollutants will evaporate, mainly low-boiling volatile organic compounds (VOC), ammonia nitrogen, hydrogen sulfide, etc. But the point is the maximum temperature of the hot air in Shincci dryer is not higher than 80℃, and compared with other drying methods, the amount of pollutant precipitation is extremely low; After dried the moist air passes through the evaporator in the dehumidification heat pump system, then the water vapor rapidly condenses. During this process, most of the above-mentioned pollutants will be dissolved in the condensate and discharged. For example: Our Foshan Xinlong WWTP Project detects the COD of the condensate It is 40-50mg/L, and the ammonia nitrogen concentration is about 15mg/L; of course, it is impossible to remove 100% of pollutants during the condensation process, but the stroke of my dryer is cyclic, constantly absorbing the pollutants in the sludge, and is constantly "washed" and removed by condensed water, so pollutants cannot accumulate indefinitely, and an equilibrium will be reached. This equilibrium state can be calculated theoretically, just like wind-borne water vapor, at 1atm (standard atmospheric pressure), 20 ℃ (the temperature of the wind after cooling), the saturated partial pressure of water vapor is 2.337kpa, which means that each kilogram of dry air can carry up to 14.6g of water vapor. This is a saturated state. If this amount is exceeded, the water vapor will definitely condensation into water, (according to the basic physics, relevant information would helpful for better understand); the ammonia nitrogen and volatile organic compounds is in same way; After dried the moist air passes through the evaporator in the dehumidification heat pump system, then the water vapor rapidly condenses. During this process, most of the above-mentioned pollutants will be dissolved in the condensate and discharged. For example: Our Foshan Xinlong WWTP Project detects the COD of the condensate It is 40-50mg/L, and the ammonia nitrogen concentration is about 15mg/L; of course, it is impossible to remove 100% of pollutants during the condensation process, but the stroke of my dryer is cyclic, constantly absorbing the pollutants in the sludge, and is constantly "washed" and removed by condensed water, so pollutants cannot accumulate indefinitely, and an equilibrium will be reached. This equilibrium state can be calculated theoretically, just like wind-borne water vapor, at 1atm (standard atmospheric pressure), 20 ℃ (the temperature of the wind after cooling), the saturated partial pressure of water vapor is 2.337kpa, which means that each kilogram of dry air can carry up to 14.6g of water vapor. This is a saturated state. If this amount is exceeded, the water vapor will definitely condensation into water, (according to the basic physics, relevant information would helpful for better understand); the ammonia nitrogen and volatile organic compounds is in same way; The minimum temperature of the air(wind passing through the regenerator) inside the dryer is below 20℃. At this temperature, the saturation concentration of pollutants that the wind (air) can carry is very low, usually less than one thousandth; in addition, this part of the pollutants are dissolved in the wet sludge water, that is to say, the amount of water in the wet sludge is completely enough to dissolve these pollutants, so there is no need to worry about insufficient condensate; In summary, pollutants will not accumulate in the gas, which is far below the explosion threshold; if the customer is still worried about this problem, Shincci can install a tap water spray system at the back of the evaporator inside the dryer. Strengthen the washing effect and further reduce the concentration of pollutants in the circulating wind.

Due to the diversity of projects and sludge, the efficiency achieved by any equipment is different when it is used in different environments and sludges. Therefore, Shincci calculates the water removal and energy efficiency under standard conditions according to the standards of International Refrigeration Association. The actual project will be different. It may be slightly higher or lower. Before signing the contract, we will take a sample of your sludge for forming + drying experiments. According to the experimental data and previous case experience, Shincci can promise your company the amount of water removal and energy efficiency;

Let's make a theoretical assumption.

Assuming that the temperature of wet sludge is the same as that of dry sludge and condensed water, that is, the enthalpy value does not change (the energy does not increase or decrease), and the temperature of dry material and condensate is not above 20°C in the actual process, this part of the energy loss is very small;

Assuming that there is no heat loss in the dryer, of course it must exist in the actual process. After the upgrade of the dryer, the heat preservation level has reached a high level. This part of loss is also very small in actual process;

Assuming that there is no gas leakage at the material entrance and exit, the material sealing method is adopted in the actual process, and this part of the loss is also very small; If the above three assumptions are all established, Shincci dryer is like a black box, only Energy input (consumption of electric energy), and no energy output. Of course, the above three assumptions are not valid in the actual process. Heat must be discharged. However, except for the extremely cold environment (Northern winter), the input energy is much greater than the output, So Shincci drying machine is equipped with an air cooler to discharge the excess heat out of the system;

As for why the electrical energy consumed by compressors and blowers can be converted into heat, this is the first law of physics: "The principle of conservation of energy is also a special form of the law of conservation and transformation of energy in the field of thermal phenomena. In a thermodynamic system Energy can be converted from one form to another, but it cannot be produced or destroyed by itself;”, it can also be understood as electrical energy supplied to compressors or blowers and converted into mechanical energy (conversion efficiency is about 95 %, the remaining 5% becomes heat dissipated into the wind through mechanical friction, and becomes the internal energy of the wind), the compressor or blower performs work on condensation or air, and the mechanical energy is converted into internal energy or kinetic energy (the conversion efficiency is about 50-75% , 50-25% of it becomes heat dissipated into the wind and becomes the internal energy of the wind). During the operation of the refrigerant and wind, all kinetic energy is converted into internal energy, and internal energy is energy; according to the principle of energy conservation, although the intermediate energy forms are diversified , But the electrical energy is eventually converted 100% into heat and enters Shincci dryer system; take the 2400 model as an example, the energy input into our dryer system per hour is 26kwh, or 22000Kcal, which is already very large ;

The concentration of pollutants carried in the wind (air) is low, usually less than one-thousandth, that is, the static pressure of the wind increases by up to one-thousandth, which is very small; in addition, the work of the fan will make the pressure at the outlet higher and increase the wind The static pressure is 0.35-0.5kpa, that is, the pressure is 0.5%, and there is no pressure risk; there is no need to install a pressure sensor, because the dryer is not a pressure vessel, assuming there is pressure, it will be discharged from the inlet and outlet. Of course, this is an assumption. There is no wind leakage in actual operation.

Yes, but it needs to be customized.

The concentration of pollutants carried in the wind (air) is low, usually less than one-thousandth; and the temperature is low, so there is no risk of explosion.

Whether the condensate contains pollutants depends on whether there are volatile pollutants (65°C) in owner’s project sludge. Shincci dryer does not do any treatment for this pollutant, that is, neither increase nor decrease; in principle, we don’t recommended that the owner discharge the condensate directly.

The Shincci sludge dryer can be used to dry sludge with a moisture content of 50%-85%, but for each project, our company will design the feeding system, molding system and discharge system according to the actual situation, that is, once the entire equipment is finalized , Its applicable water content range generally does not fluctuate more than 2.5%, of course this is also an empirical value, subject to the scope promised in the final contract or technical annex.