Cleaning  of  deposits  smoke  pump  rotor  boiler  units
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Protect the surface of the concrete floor
To protect the concrete floor, which is operated in the normal mode, or is subject to wear in areas with high traffic, there are several ways to protect the surface.
   Comparable ways: their cost, appearance and ability to perform the task to protect.
   In this article, we consider three ways to finish and protect the floor. Each of them has its advantages and disadvantages.
   Thin fil...

Finishing compositions based on water glass. Part 3
When used as part of exhaustion moderator comes coagulation and solidification of liquid glass. However, due to the presence in the composition of Portland cement with a finishing time is an increase strength of the coating due to hydration of cement minerals. Thus from colloids formed during the coagulation liquid glass are actively assigned to the water for hydration of cement, a porous media formed tumors filled Portland cement, which leads to...

Finishing compositions based on water glass. Part 2
Studies in Berlin Institute Federal institute for Materials Research and Testing, show that the average density of 1730 kg/m3 brick large proportion of pores having a size in excess of 1 micron is more than 90% [3] and they are responsible for the increased migration of fluids through brickwork.
   Most fully meet these requirements structure obtained by coagulation and water-soluble potassium silicate forming silica with a high sp...

Modernization and repair of self-propelled machines. (3)
Hardening electrolysis BORATING hinge pins and bushings mates working equipment hydraulic excavators EO-4121 (EA-4321) gives an increase in wear resistance 4-6 times compared to the bulk quenching details.
   Taking into account the high wear resistance of brazed blades, hardened sintered alloys (see Table 1), are recommended for carbide knives dumps graders DZ-122 and RS-98, combined machine E-405 based on KAMAZ, for front dumps a t...

Specialized exhibition Architecture. Construction (END)
Mari-lime brick and gas silicate blocks
   JSC "MZSK" produces silicate brick and a half, color (white, yellow, black, red, blue, green, brown).
   For the production of silica brick used quartz sand from quarries near the plant. Limestone enters the factory with Dobryatinskogo deposit Vladimir region. Silicate brick (Table 1) is used for masonry exterior and interior walls of buildings and structures, as well as ...

Geophysical processes primers and security. Part 5
In the center of Moscow can distinguish vertical structure comprising a crashing into the Earth`s crust magma elongated cylinder (Fig. 2) [5]. In the center section marked lack of extensive vertical zone converted waves ("blind spot"), going from the depths of 70-80 km to 7.5 km. Such "blind spots" are characteristic of the earth`s crust with the introduction of monolithic dense mantle rocks such as gabbro, diabase, etc. In such a zone Tashkent e...

Finishing compositions based on water glass. Part 1
The quality of the decoration of buildings for new construction and reconstruction depend not only on their aesthetic, but also the operational parameters, as good-quality finish - a guarantee of durable service basic designs, long maintenance-free operation, the costs for maintenance and care. Traditional binders used for the production of finishing compositions, liquid glass is widely used, but it has some drawback: coatings based on it gaining...

On possible amendments to the equation Griffiths
Griffith presented a picture of destruction allowed to formulate the problem of determining conditions of the beginning of crack propagation and find its general solution.
   As seen from the above schemes, in the process of crack propagation material directly adjacent to it "coasts" unloaded relaxes. This means that the stress and strain it decreases, and the elastic energy stored earlier in this area of ​​the body is re...

Construction skyscrapers - the requirements of modernity. Part 4
The program is a high-rise building in Moscow
   The project is now a high-rise building in Moscow is implemented in two main areas: the construction of business center "Moscow City" and implementation of the program of the Government of Moscow "New Ring of Russia."
   1. Moscow international business center "Moscow - City"
   The project includes the construction of buildings on the territory of abou...

Degree project - beginning of the road. (3)
Given the great diversity of subject matter and content of diplomas in various specialties, the jury is faced with great difficulties in determining the winners - "Who better violinist or a dancer?". Nevertheless, often based on emotional perception and can estimate the relevance and novelty, and the author`s contribution to the thesis project or job. Absolute winners in recent years have been graduates of Rostov CSO GASU St. Petersburg, Nizhny N...


 Information for builders



 Cleaning  of  deposits  smoke  pump  rotor  boiler  units

During operation dymososov installed in gas exhaust ducts boilers for gas treatment devices in the form of low-pressure Venturi tubes with high efficiency cleaning on the blades and disk impellers appear deposits consisting of untrapped particles of ash fines, unburned fuel and hardness. Skid flowing part dymososov solids causes a decrease in the cross sections of channels and distortion blade profiles, which reduces the efficiency of the exhauster and an imbalance of the rotor. Exhauster must be stopped for cleaning, often by hand, that time-consuming and leads to long delays.
   Analysis of currently used measures to combat the formation and removal of sediment in the flow section dymososov vzaimoochistnyh structures showed that the working conditions of dymososov boilers one of the most promising methods for removing sediment is periodic flushing flow of the cleaning solution. The figure shows a diagram of washing, designed to clean flowing part dymososov D20h2 Kirov plant (fuel-Vorkuta and Inta coals). The examination on the concave part dymososov bent forward working blades and disks were discovered deposits of 40-60 mm thick. On the surface of the impeller deposits unevenly adhered on the thickness of the blades increases in the direction of the coating to the central disc.
   In the proposed scheme for the preparation of washing solution tank 2 is equipped with a stirrer if necessary. To the desired temperature, the solution can be heated by steam. Pump 3 through the filter 4 the solution was fed through pipes 7 to the jet nozzles 5. Nozzles mounted on booms 6 just before the leading edge of the working blades exhauster 1. Design of the attachment allows you to move the nozzle along the edges of the blades and change the angle of attack of the jet spray. Cleaning solution, getting on deposits, destroys the integrity of their layers, crushes deposits, which are then blown off the surface of the flow of the gas stream. Ejector 8 serves to remove residual contaminants from snails exhauster.
   Industrial tests were carried out on the developed system Dymososy D20h2 Kirov Plant. Dymososy set for ash collectors involving the venturi scrubbers and CA VTI. On examination, held before the tests, on the blades, the coating and the central disk of the impeller were discovered deposits with thickness up to 15 mm. When working exhauster was an increased vibration bearings. Rinsing was carried out at normal drivable speed of n = 580. / Min. As the cleaning solution is used process water supplied to the nozzles at a pressure of 0.4 MPa. Water consumption was 1.5 kg / s at ID fan, washing time - 2 minutes. and 5 min. respectively for the left and right sides of the exhauster. After 2 min. after the start of washing bearing vibration reduced to an acceptable level. Conducted after stopping exhauster examination showed that all the running part (rotor blades, disks) completely free of deposits, snail and dry flue, they were observed removing sediment accumulation.