SU1320590A1 - Stand for studying depositions and corrosion in boilers - Google Patents

Abstract

This invention relates to the field of power engineering. The purpose of the invention is to increase the reliability of research results, simplifying their processing. For this, the air heater is installed in the bypass duct 5, the inlet section of which is connected to the main duct 3 in the zone between the blocks of the experimental pipes (ET) .4. ET 4 are double-walled with the formation of an airtight cavity between their walls. The flue gases from the furnace through the inlet section pass the bypass duct 5 with an open gas register (L CAD o sd with Put.z

Description

and discharged through a common flue to the atmosphere. After the flame is stabilized and the predetermined temperature and speed are established in the main gas duct 3, the gases passing through it wash ET 4. At the last ET, sedimentation and corrosion processes take place. After the experiment, the outer walls of the ET 4 are removed and weighed. Performance

one

The invention relates to a power system and can be used in devices for studying deposition and corrosion processes in boilers.

The purpose of the invention is to increase the reliability of research results, simplify their processing, as well as increase the economy, safety and expansion of the limits of the studied parameters.

Figure 1 shows the stand; the schematic diagram of Figure 2 is the same, the general BJHWJ in Figure 3. Section A-A in FIG. 2, in FIG. 4 is a section bB in fig. 3 in fig. 3 is an experimental tube for investigating the influence of the induced potential of static electricity J in fig. 6 a ribbed experimental tube.

The stand contains an air heater 1, a firebox 2. connected to the main gas duct 3 with experimental pipe blocks 4 installed in it, as well as a bypass gas duct 5 connected to the inlet and outlet sections with the main gas duct 3.

Air heater 1 is installed in the bypass duct 5, the inlet section of which is connected to the main duct 3 in the zone between the experimental tube blocks 4. Experimental tubes 4 are double-walled to form between their inner and outer walls 6 and 7, respectively, a sealed air cavity 8. (Fig. 7 ). Experimental pipes 4 are assembled into blocks that form a sub-section 9, a superheater 10, a convection section 11, an economizer 12 and a gas flow cooler 13 (ballast).

ET 4 double walls with hermetic air gap allows holding the temperature of the outer wall of the ET 4 at a level appropriate to the conditions of the Simulated boilers, moreover, it increases the economy and safety of research and expands the limits of the studied parameters. 1 hp f-ly, 6 ill.

The stand is equipped with a fan 14, air and gas registers 15 and 16, a fuel heater t7, a common gas duct 18. The main gas duct 3 is divided into sections with inserts 19 made of metal or (when studying the effect on deposition and corrosion of magnetic and electrostatic forces ) from non-magnetic thermo

resistant material.

five

five

Each unit (FIG. 3) includes a housing 20 with a drainage pipe 21, bobster 22, in which experimental pipes 4 are installed with central water supply pipes 23 having openings 24 in the lower part, a cover 25 and a perforated partition 26. The cover 25 is fixed water inlet and vapor outlet pipes 27 and 28 respectively. A shield 29 is installed at the bottom of the unit to separate the lower ends of the experimental tubes 4 from the gas flow. Experimental tube 4 is provided with a plug 30.

The walls 6 and 7 of the experimental pipe 4, when studying the influence of electrostatic and magnetic forces, are made of heat-resistant insulating material, for example, ceramics.

In the embodiment of the experimental tube 4 shown in FIG. 4, used to study the effect of the induced potential of static electricity, there are ring terminals 31 made, for example, of silver, fixed with insulating inserts 32.

In the cooler 13, the gas flow is 0

0

Experimental tubes 4 fitted with fins 33 are used (Fig. 5).

The air preheater of the 1st type pipe in the pipe can be made counterflow, and the firebox 2 is equipped with a shell 34 in order to maintain the heat stress of the furnace volume.

The stand works as follows

The start-up and initial stages of the stand operation are made on light fuel. The flue gases from the firebox 2 pass the bypass gas duct 5 with the open gas register 16 through the parasite section 9 and are discharged through the common gas duct 18 to the atmosphere.

After the stand is heated, a transition is made to the studied fuel type. After the flame is stabilized in the furnace 2, the gas register 16 is covered up to the establishment of a predetermined temperature and speed in the main gas duct 3. The gases passing through the main gas duct 3 wash the experimental pipes 4, on which sedimentation and corrosion processes take place. After the experiment, the outer walls of 7 experimental tubes 4 are removed and weighed.

The implementation of the experimental pipes 4 double-walled with a sealed air gap allows, at atmospheric pressure, the heat carrier of the stand to maintain the temperature of the outer wall of the 7 experimental pipes 4 at a high

O

 5 20

thirty

a level corresponding to the conditions of simulated boilers operating at higher pressures, which increases the cost-effectiveness and safety of the stand, as well as expands the limits of the parameters studied.

Claims (2)

1. A bench for examining deposits and corrosion in boilers, containing an air heater, a furnace connected to the main gas duct with experimental pipe blocks installed in it, and a bypass gas duct connected to the main gas duct, characterized in that reliability of the research results and simplification of their processing; the air heater is installed in the bypass duct, the inlet section of which is connected to the main duct in the zone between the experimental work blocks . 2. Stand POP.1, characterized in that, in order to increase efficiency, safety and ... expand the limits of the parameters under study, the experimental tubes are double-walled to form a sealed air cavity between their walls. G5 cpui.l 25 2b  h 1320590 28 / 27 2 / g | B B J sAX / vvvs d2 Fig.Z it ES / Z E2ZZ 31 Vut.5 Editor I. Segl Nick Compiled by G.Savvat11msky Tehred A. Kravchuk Proofreader A. Ilyin Order 2644/41 Circulation 387 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 6