The monitoring system of LWD430W centrifuge sewage treatment system is made by RSView32 monitoring software of Rockwell Automation Company. The production methods of basic items of monitoring system such as communication configuration, marking database establishment and data recording are introduced in detail, which can be used as a reference for relevant personnel.
When the inlet pressure or flow decreases suddenly and is lower than the allowable operating point, the gas in the compressor will be seriously rotated and separated due to the change of flow, resulting in sudden stall. At this time, the impeller can not effectively increase the gas pressure, resulting in the decrease of outlet pressure.
In the design of coal mine sewage treatment plant, activated sludge process was adopted in the 1980s. Due to the low content of organic matter in sewage, microorganisms can not get the minimum nutrients during operation, so they can not form activated sludge and can not operate.
Sludge treatment technology includes sludge concentration, dehydration and drying. The existing technology in China is basically sludge thickening and dewatering technology. After sludge thickening and dewatering, the water content of sludge can only be reduced to about 80%, while developed countries are gradually requiring the water content of sludge to be reduced to 20% - 30%. Therefore, efficient and economical sludge treatment technologies, including dehydration and drying technologies, will have a huge market.
Sorted by time saving: horizontal screw centrifuge, horizontal scraper centrifuge, aut full-automatic centrifuge, cone basket centrifuge, scraper centrifuge, bag centrifuge, lower discharge centrifuge and upper discharge centrifuge
The application of imported machines still accounts for a large proportion in China, especially in the field of sludge dewatering in industrial and municipal sewage treatment, especially in some newly-built municipal sewage treatment plants, and imported horizontal screw centrifuges account for a large proportion. In view of this situation, several imported and domestic horizontal screw centrifuges are analyzed one by one in terms of technical performance.
There are many kinds of horizontal screw centrifuges. According to the separation method, it can be divided into horizontal screw sedimentation centrifuge and horizontal screw filtration centrifuge. According to the flow direction of solid phase and material, it can be divided into countercurrent horizontal screw centrifuge and cocurrent horizontal screw centrifuge. According to the number of separated phases, it can be divided into two-phase horizontal screw centrifuge (two-phase horizontal screw centrifuge) and three-phase horizontal screw centrifuge.
In the process of using the centrifuge, the problem of slow dewatering efficiency of the centrifuge is encountered, which is manifested in the following aspects: with the increase of solid image materials in the drum, the dewatering time of the centrifuge is prolonged, and the centrifuge cannot be dried. This phenomenon is universal.
The horizontal screw centrifugal sludge dewatering unit is mainly composed of horizontal screw centrifuge, automatic flocculant preparation and dosing device, sludge crushing and cutting machine, sludge feed pump, dosing pump, single screw sludge transfer pump, flowmeter and automatic control system.
Sludge incineration equipment mainly includes rotary incinerator, vertical multi-stage incinerator, fluidized bed incinerator, etc. in the past, vertical multi-stage incinerator was commonly used abroad, and recently fluidized bed incinerator was commonly used. The innovation of the device is that the sludge is harmless after drying and incineration, which will no longer cause secondary pollution to the environment or new pollution.
In the process of urban sewage treatment, it is inevitable to produce sludge with high moisture content, which contains a lot of organic matter, rich nitrogen, phosphorus and heavy metals. With the improvement of sewage treatment rate and degree, the sludge output will inevitably increase, resulting in the increasingly serious problem of sludge disposal.
The greenhouse system consists of the main body of the greenhouse, ventilation system, heating circulation system, internal and external weather stations and computer control system. The main frame of the main sunlight plate greenhouse is hot-dip galvanized steel pipe and steel plate, the top of the greenhouse is special aluminum profile, and the fan is used in the north and south of the ventilation system. It can be automatically turned on according to indoor and outdoor temperature, humidity and sunlight illumination parameters.