Sludge dehumidifier and dryer in Shizeng mine
Deye professional machine
● multi-layer three-dimensional design, less land occupation, fast drying, The structure is scientific and reasonable
● using solar energy as the main energy to meet the needs of sustainable development
● low energy consumption, low operation and management costs, the power consumption of evaporating 1t water is only 60-80kw; h. The power consumption of traditional heat drying technology is 800-1060kw; h
● after drying treatment, the sludge volume can be reced to 1 / 3-1 / 5 of the original volume to realize stabilization and retain its original reuse value
● the system runs stably, safely and proces little st
● high degree of automation, convenient operation and maintenance, long service life
● the system has high transparency and good environmental coordination.
scope of application: feed sludge moisture content 50% ~ 83%, drying to moisture content 10% ~ 20%
operation energy consumption: 3kg water per kilowatt hour, without other energy consumption and chemicals,
equipment investment: about 200000 per ton of water per day (equipment customized, unit dehumidification capacity 400kg / day ~ 32t / day)
operation characteristics: low temperature (40-75 ℃) automatic operation, safe, No exhaust emissions, no need to deal with condensate emissions, environmental protection
according to the above parameters, your investment can be roughly calculated
the specific details need to be confirmed with experts, you can visit Guangzhou Shengqi energy online
30-60%; The solid content of biochemical sludge can reach 20-25%; The solid content of filter cake of belt dehydrator is lower than that of plate frame and box dehydrator< If the solid content is above 60%, evaporation is the only way to achieve it.
total dehumidification: the company patented the design of total dehumidification system. It has three functional moles: intelligent control, automatic balance adjustment of cold and heat, and environment independent detection. Intelligent control of cold and heat output. Make the distribution of cooling capacity and heat output reach the golden ratio, and maximize the energy efficiency ratio.
now there will be a new standard for sludge treatment in China, and the moisture content of sludge will be reced from 80% to 60%. It can be seen that the country now attaches great importance to sludge treatment.
Technical characteristics of domestic sludge dryer:
1. It can fully realize the "rection, stabilization, harmless and resource-based" treatment of sludge, and the final sludge particles can be used as fertilizer, fuel, incineration, building materials, biofuel, landfill cover, land use, etc
The continuous mesh belt drying mode is suitable for all types of sludge drying systems (including sludge with large sand content) and has long service life3. The sludge cake with 80% water content can be dried into sludge particles with 10% water content; The capacity of sludge is reced by 1 / 4-1 / 5, and the calorific value of urban sludge can reach 3000kcal / kg after drying
According to the different solid content of sludge, different paving modes are adopted Low temperature (40-75 ℃) fully enclosed drying process, no exhaust emissions, no odor treatment system; Low temperature drying can fully avoid the volatilization of different types of organic compounds in sludge, and avoid the volatilization of odor gas (the volatilization temperature of chain alkanes and aromatic hydrocarbons is 100-300 ℃, the volatilization temperature of cycloalkanes is 250-300 ℃, the volatilization temperature of nitrogenous compounds, amines and oximes is 200-300 ℃, and the volatilization temperature of alcohols, ethers, fatty ketones, aliphatic ketones, aliphatic ketones, aliphatic ketones, aliphatic ketones, aliphatic ketones, aliphati The volatilization temperature of amides and nitriles was above 300 ℃. In addition, the volatilization temperature of aldehydes and anilines is mainly 150 ℃, and the volatilization temperature of lipids is 150-250 ℃) The whole drying process can be carried out in a closed environment, no gas will be discharged into the external environment, and no secondary environmental pollution will be caused; There is no pollutant emission in the drying process, and the sanitary condition of the drying workshop is good; The centralized water cooling mode is selected, with good cooling effect and good working temperature in the workshop7. The system runs safely without hidden danger and nitrogen flushing; Oxygen content in sludge drying process & lt; 12%, st concentration & lt; 60g / m3, particle temperature & lt; No st (air flow rate & lt; 2 m/s)
The conveying speed of mesh belt is controlled by frequency conversion, and the moisture content of sludge discharge can be adjusted (10-30%), which can meet the requirements of various processes The advanced heat pump dehumidification technology can save more than 40% energy and consume about 0.3% electricity per 20 hours; Traditional sludge drying equipment 120 needs to consume energy, electricity, cooling water, chemicals and so on; Adopting the mode of low valley and staggering peak can save more than 60% energy The equipment covers a small area and is easy to install; For every 1000kg water evaporated, the equipment covers an area of about 3.5m2 The daily treatment capacity of a single drying line can reach 45 tons (80% moisture content sludge cake), and the daily treatment capacity of 55% moisture content sludge cake can reach 140 tons, which can be suitable for the mode of sludge dispersion or centralized treatment. Through the treatment of sludge biscuit, the volume rection can be realized, the transportation cost of sludge can be saved (the transportation cost of each ton of sludge is more than 100 yuan according to different roads), and the environmental pollution ring transportation can be reced PLC + touch screen control system, automatic operation, convenient operation and management; Dry and wet bulb temperature and humidity control, feed rate frequency conversion control, molding control, discharge solid content control, paving control, manual control, etc 
sludge is a kind of solid sediment proced in the process of water and sewage treatment. As the nature of all kinds of sludge changes greatly, classification is very necessary, and its treatment and disposal process is also different. According to its source, it can be roughly divided into municipal sludge, pipe network sludge, river and lake sludge, instrial sludge and other categories. In the process of wastewater purification, the pollutants in wastewater are removed by biochemical degradation. Biological treatment can degrade most organic pollutants into water and gas (oxygen and carbon dioxide proced by aerobic treatment and CH4 mainly proced by anaerobic treatment), while metal pollution (including heavy metals) can not be treated and concentrated in sludge. The sludge proced by sewage treatment has a high water content. Due to the characteristics of the combination of water and sludge particles, mechanical removal has a certain limit. The content of organic matter in the sludge, the proportion of ash, especially the addition amount of coagulant, have an important influence on the maximum solid content. Generally speaking, 20% - 50% solid content can be obtained by mechanical dewatering, and the sludge formed is called sludge cake. The moisture content of mud cake is still very high, and its disposal difficulty and cost are still very high, so it is necessary to further rece the water content. At this time, in addition to the natural air drying, only through the input of heat to form evaporation, can achieve large-scale rection, using heat for drying treatment is heat drying. The domestic sludge dryer discussed in this paper is a kind of heat drying technology
air energy heat pump is a device that uses refrigeration system to cool and dehumidify the hot and humid air, and at the same time, recovers the water in the air through the principle of heat pump, condenses the latent heat to heat the air. Dehumidification heat pump = combination of dehumidification (dehumidification and drying) + heat pump (energy recovery). The cost of sludge drying is high, which is the main bottleneck restricting the application scale of drying technology; 90% of the heat supply of traditional sludge drying system is converted into heat loss of exhaust air (latent heat of steam and sensible heat of hot air); Dehumidification and drying is to recover the latent heat of water vapor and sensible heat of air in the exhaust air, and there is no waste heat emission in the process of dehumidification and drying
heat pump heating cop, calorific value cop generally between 3-5, that is, the traditional drying heating power 4kw, in the heat pump drying only need to input 1kW electric power. Heat source = condensation heat released by water vapor phase change in air, 2424 kJ / kg at - 30 ℃; 2355kj / kg at 60 ℃ and 2258kj / kg at 100 ℃ (coal calorific value 18000kj / kg)
the sludge has high water content, large volume, high content of organic matter, easy to rot and stink, embryoid structure, difficult to dehydrate, high cost of dehydration, and excessive content of heavy metals and bacteria. It is easy to proce secondary pollution, and the output continues to grow, rising sharply at the rate of 10-15% per year. Not only that, our sludge dryer has many advantages: small floor area, no need for external platform, saving infrastructure costs; It adopts full intelligent automatic control system, low operation cost, central monitoring, no need to set up special posts, only need to make a routine inspection once a day; The maintenance cost is low, which is only equivalent to the maintenance of an air conditioner; The operation flexibility is large, and the PLC parameters can be adjusted to meet the different requirements of sludge dryness (30% - 90%); Evaporation temperature is low, distilled water is equivalent to ordinary water; Because the temperature of the dry air after heating is only 40 ℃, the explosion is avoided, and the generation of odor is restrained. When the moisture content is reced to 30% - 40%, the domestic sludge dryer can make the sludge loose, granular, better bearing capacity, less odor, good hydrophobicity, and can be effectively incinerated, landfilled, etc., which is more convenient for treatment
structure of domestic sludge dryer:
sludge dehumidification drying = hot air circulation + condensation dehumidification drying (dehumidification heat pump). There are two core processes. The first is: sludge moisture absorption (hot air) vaporization = wet air + dry material (vaporization); Secondly: ★ the wet air passes through the dehumidification heat pump = condensed water + dry hot air (condensation)
1) the heat recovery technology of heat pump is adopted, and there is no waste heat emission in the closed drying mode; 2) Drying process at low temperature below 80 ℃; 3) Static spreading, no mechanical electrostatic friction with the contact surface; 4) There was no "sticky phase" in the drying process of municipal sludge (about 60%); 5) The dry material is granular without st hazard; 6) The discharge temperature is low (< 50 ℃), and it needs no cooling and can be stored directly
innovative technology of air energy heat pump sludge dryer:
1) three effect dehumidification and regeneration technology can be adopted, with lower outlet humidity and high drying efficiency; At the same time, the use of three effect technology can save a lot of fan energy consumption
2) the layered air distribution system is adopted to meet the requirements of rapid dehydration of wet mud, and the low-temperature drying cycle is short; 1. It is sent to cement plant and mixed with clinker to proce cement; 2. In this way, the coal consumption of the boiler is reced and the economic benefit is improved; 3. Instead of clay and coal powder, it is sent to brick factory for light brick proction; 4. It can be used as slow release fertilizer to improve crop yield; 5. Used as chemical raw materials for proction; 6. It can be used as soil conditioner to improve soil erosion resistance and water retention performance
4) the transmission and feeding motors adopt frequency conversion stepless speed regulation, which is suitable for dry materials with different moisture content (10% - 50%), and has stronger adaptability
scope of application of domestic sludge dryer:
it can also be used for the drying treatment of electroplating sludge, leather sludge, papermaking sludge, alumina sludge, municipal domestic sludge, tannery sludge, chemical sludge, steam sludge, printing and dyeing sludge, etc., and it is suitable for electroplating, hardware procts, paper mills, electrolytic aluminum, alumina, soy sauce resie, sewage treatment, wastewater treatment Sludge dehumidification and drying treatment of dyeing plant, printing plant, fruit resie, biological preparation, biotechnology, fertilizer, pharmaceutical plant, hazardous waste solid recovery and disposal company, chemical plant, feed plant, water company, instrial park sludge and sewage treatment plant, municipal sewage treatment department and other units