Product profile:

Low temperature sludge drying equipment is a kind of treatment technology that uses the dry air generated to circulate in the system, and provides heat energy to indirectly heat the sludge. Combined with heat transfer, mass transfer and sludge agitation, it can speed up the sludge drying efficiency. The water content of plate and frame filter press, belt filter press, screw stacking dehydrator and centrifugal dehydrator can be reduced from 80% ~ 85% to 10% The dried mud below. This technology can reduce the sludge volume by 1 / 4, only need to consume electric energy, no other auxiliary energy, energy consumption is 1 / 3 of the conventional electric heating or direct heating drying equipment. However, if the customer has waste steam or waste hot water above 70 ℃, the heat energy subsidy of waste heat can be used to greatly reduce the energy consumption of sludge drying. The system has no special requirements for external humidity and temperature, and the whole system can continue to operate with high efficiency.

In the process of dehumidification and drying, this product has no waste gas emission. At the same time, the latent heat and sensible heat of water vapor are recovered, and the recovered heat is used to supplement the heat required for sludge drying and heating, so the energy consumption of sludge drying can be greatly reduced.

Process principle:

The sludge dehumidifier uses the dehumidification heat pump to dry the sludge by hot air circulation condensation

1. Dehumidification and drying is to recover the latent heat of water vapor and sensible heat of air in the exhaust air. There is no waste heat emission in the process of dehumidification and drying. 90% of the heat supply of the traditional sludge thermal drying system is converted into the heat loss of exhaust air, and the latent heat of water vapor and sensible heat of hot air are lost.)

Dehumidification and drying is composed of two parts: conveyor belt and heat source equipment.

3. The heat pump drying unit adopts the principle of reverse Carnot cycle, and uses a small amount of electricity to drive the compressor to do work, so as to cool the water vapor in the indoor air through the evaporator to condense water, and then discharge it out of the room, and then increase the temperature through the condenser. The heated air can continue to absorb the water in the material because it is not full, and finally make the material achieve the ideal dryness.

4. The normal operation of the drying room and heat source equipment is realized through the self-developed microcomputer automatic control system. According to the actual process requirements of the drying room, it can intelligently control the unit start and stop time, control the temperature in the drying room, so as to improve the drying quality on the basis of saving time and effort.

Main features:

energy conservation

The heat recovery technology of heat pump is adopted, and there is no waste heat emission in the closed drying mode;

80% wet mud per ton is dried to 20%, and the comprehensive power consumption is 195kwh;

Each kilowatt hour of electricity can remove 30 kg of water, and the dehumidification performance ratio is 1:30 kg. H Ψ O / kW. H);

80% wet mud per ton is dried to 60%, and the comprehensive power consumption is 125 kW. H;

security

The low-temperature drying process below 80 ℃ is fully suitable for municipal, printing and dyeing, paper industry sludge drying system operation safety, no explosion hazard, no need to flush nitrogen operation;

During sludge drying process, oxygen content is less than 12%, dust concentration is less than 60gm3, particle temperature is less than 70 ℃;

There is no "sticky phase" stage in the drying process of municipal sludge (about 60%); the dry material is granular, and there is no risk of dust;

The discharge temperature is low (< 50 ℃), no need to cool, direct storage.

environment protection

Using low temperature (40-75 ℃) fully closed drying mode, no odor, no need to install complex deodorization device;

The precipitation amount of H2S and NH3 is greatly reduced by low temperature drying process;

The installation of condensate (sewage mixed water) is simple (or direct discharge), saving the cost of condensate treatment in drying process.

Efficient

There is no loss of organic matter in the drying process, and the calorific value of the dry material is high, which is suitable for later resource utilization;

The capacity and weight can be reduced by 67% and 80%, which can save a lot of later transportation cost;

It is suitable for sludge drying with 83% - 50% moisture content

stability

Pasteurization method was used to sterilize at low temperature. The drying temperature was above 70 ℃ and the time could reach 90mn-120mn, which could effectively sterilize more than 96%.

Negative pressure operation

When the fan side of the unit is on the drying line side, the inside of the box is in a negative pressure state. Prevent gas leakage inside the box.

Free setting and adjustable temperature

The drying time and temperature can be set freely, and the air outlet temperature of the unit can be set freely between 65 ℃ and 80 ℃, which ensures the drying quality.

intelligence

Full automatic operation, save a lot of labor costs; discharge moisture content can be arbitrarily adjusted (10% - 50%).

durable

Stainless steel and other corrosion-resistant materials, heat exchanger with electroplating corner treatment, long service life.

Innovative technology

Break through the bottleneck of pump drying high temperature technology, high temperature performance, solve the problem of air source heat pump dryer frosting and poor high temperature performance in winter;

Using the patent technology of four effect dehumidification, the technology of middle heat exchange, temperature gradient utilization and the comprehensive dehumidification performance ratio {SMER) is more than 2.8kgh2  kwh

Break the technical bottleneck of traditional dehumidifier and ordinary heat pump dehumidifier dryer;

To solve the technical problems of poor dehumidification performance of traditional dehumidification equipment under the condition of high temperature and low humidity, even the idling compressor running without water removal;

According to the different moisture content of mud cake, different molding technology can be used to reduce the drying time of mud cake and provide the comprehensive energy efficiency of drying system.

Selection parameters of sludge drying system (linear)