UA50491U - External economizer - Google Patents

Abstract

An external economizer includes a tubular heat exchanger and collectors. It has two cylindrical collectors that form pack of economizer, those installed in horizontal positions and connected by vertical pipe rows. Each next pack of economizer is connected to previous one through common gathering main. At that the pipes that connect horizontal collectors are arranged in each pack of economizer is such way that to keep the chess order of placement of those in one plane with respect to horizontal flow of combustion products.

Description

pipes with ash and soot, reduce technical and economic indicators of cast iron economizers. position adopted the design of the heat recovery unit

The closest to the proposed flat-bearing economizer (BE), in which the surface is a steel water economizer, which is used for heating, a flat-oval pipe is a tubular heat exchanger with a raised (Fig. 1) with incomplete transverse fins (Foam working pressure of water higher than 2.4 MPa in Smennyi E.M., Terek O.M., Rohachev V.A., Burley compared with a cast iron economizer (N.Y. Pav- V.D. Heat exchange pipe / Declaratory patent lov, M.N . Fedorov "Boiler installations and thermal utility model. 4871. Ukraine. 15.02.2005, vve seti". M. Stroyizdat, 1986, pp. 109-110, Bull. Meo2 and Pysmennyi E.M., Terek O. M., Rohachev fig.IM 40, a). VA, Burley V.D. Heat exchange pipe / Patent on

Steel economizer according to the structure of the warehouse - useful model Me25025. Ukraine. 07/25/2007, made of bent coil steel pipes of small bull. Mo11). diameter (28...30 mm), the ends of which are welded to the collection- The use of packages from such pipes increases the number of collectors in them. Collectors are made of pipes 10...15 times the area of the heat exchange surface (in the case of 200...300 mm in diameter. The coils are located in a nanny with smooth tube bundles), which, in turn, horizontally in a checkerboard pattern and washed by water, allows to reduce overall dimensions heat exchangers - from the outside by a vertical stream of combustion products. traffic jam The use of flattened oval pipes as

Depending on the surface area of the coil pipes, the heating surface provides a 1.4...1.8 smaller economizer can be equipped (in the direction of the gases) aerodynamic resistance compared to bundles of pipes in separate packages with a height of 0.9-1.5 m. Feeder of a round profile, having a lumbar spiral - water enters the lower collector, where it is distributed by strip fins. Flat-oval pipes connected by coils connected in parallel, with incomplete fins, are easy to manufacture. Having passed through them, the heated water is collected in the upper part of the rectangular ribs using a collector, from where it enters the boiler. The speed of goi contact welding. This type of finning of the water movement in the economizer is determined by the number and makes it possible to develop parallel coils practically without limits. Steel economizers surface. In the production of the surface of the boiling type, they form one whole with the boiler. waste-free production technology is used.

The coils of the steel economizer are attached to the VE single-pass economizer for gases and water. with the help of supporting racks, these racks are supported. As collectors, round hollow tubes are used, air-flowing beams of the logo profile, in which flattened oval tubes with air are welded, which are located under the economizer with incomplete transverse fins. They are inside the gas pipe. The racks have a special row, they form sections, from which eco-welded hooks (combs) are collected, on which the nomizer rests. These sections are using flanged tube coils. connections are attached to the collecting and dis-

Disadvantages of steel coil econominative collectors (Fig. 2). The longitudinal step between the zeros is the presence of a convective mine, which is significant with sections of 52-120...150 mm (Fig. 1). melting capacity, increasing the dimensions of the boiler installation - This technical solution makes it possible to disconnect heat losses to the external environment. in case of breakdown or accident, separate sections without stopping

The task of the proposed solution is to optimize the operation of the entire economizer. filling of the design of the economizer with placement The transverse size of the supporting flattened oval after the steam or water heating boiler, or the pipe d1-:15mm, the longitudinal size - d2-42mm, the thickness of the group of boilers with an increase in the efficiency of the boiler installation, pipe wall 2mm. The height of the rib is 25mm; vky on 7...10905. rib thickness 5-0.8mm; rib pitch 1-3.75 mm. Ro-

The set task is achieved by the fact that the arrangement of pipes in the VE economizer is staggered. sleep economizer, which includes a tubular heat- The VE economizer is located in the gas pipe behind the exchanger, collectors, according to the useful model, the chimney outside the boiler house building (fig. 3). it contains two horizontally installed and connected The temperature of the flue gases behind the economizer by vertical rows of cylindrical pipes, it is necessary to take into account the cooling of the lectors, which form the economizer package, each in the gas ducts and the smoke pipe, so that the next economizer package is not reached connected with the condensation temperature of water vapor. After all, due to the common collective collector, when condensate falls in the flue gases, pipes connecting horizontal collectors will lead to the formation of nitric acid (Н2Моз), which in turn will accelerate corrosion processes. in such a way as to maintain their staggered arrangement. Fig. 1 shows vertical flattened oval seams in one plane relative to the horizontal pipe 1, and their staggered arrangement. of the flow of combustion products, in addition, between the packages, Fig. 2 shows a general view of the lower and upper parts of the packages of the economized economizer, horizontal collectors, gas-directing partitions are made, and feathers 1, connected to each other by a vertical row of pipes, bypass pipes, located on the side, are connected by 2, form an economizer package, each package is a pair of neighboring cylindrical collectors, while the economizer is connected by a common bypass, cylindrical collectors and heat exchange pipes have pipe 3, which connects the input and the outlet manifold is finned, and the economizer is made from the possibility of each boiler economizer package. ty installation directly between the flue and the flue. Fig. 3 shows the diagram of the location of the eco pipe of the boiler and is made of boiler steel.

zer, 2 - gas pipe; C - brick borov; 4 - wall with cat fins 2, from where it is assembled again in the assembly room. to collector 3, passing through all packets sequentially

The boiler economizer works as follows. economizer Heated water enters the boiler, at

The heated water enters the inlet, while the water moves countercurrently relative to the horizontal collector 3, and, moving along the combustion horizons that wash the outside of the vertical rolling row of pipes 1, enters the vertical lectors of the package, horizontal rows of pipes and a bypass package of flattened oval pipes with incomplete transverse pipes.

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Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601