SU1638530A1 - Heat-recovery unit - Google Patents

Abstract

The invention relates to heat exchange technology and can be used to recover heat from low-grade contaminated gases. The purpose of the invention is to increase the efficiency of the process. In the heat recovery mode, the elements (E) 5 are inclined towards the chamber (K) 3 for a frozen medium (C). Flow C passes through grate 6 and fluidizes the nozzle (H) 7. Upon contact with H 7 impregnated with an alkali solution (N), cooling and moistening C occurs and the acid gases contained in its flow adsorb. Further, the flow C is in contact with the E 5, cooled and dried by condensation of water vapor. The H 7 particles heated in the process of contact with C give up heat to them when in contact with O 5. Particles H 7, accumulating at the upper limit of the volume H 7. Through the nozzle 10 enter the regenerator 9, where they are irrigated with a solution U and thereby regenerated. The solution, U, is fed through the fill 14. Thereafter, particles of H 7 with reduced adsorption properties are fed to K 3. As a result, the efficiency is increased, as S. uses acidic gases that are trapped in the waste heat exchanger. 2 hp f-ly, 1 ill. & ё t U s to Os 00 00 01 with about

Description

The invention relates to heat exchange technology and can be used to recover heat from low-grade contaminated gases.

The purpose of the invention is to increase the efficiency of the process.

The drawing shows the utilizer, the overall appearance.

The heat utilizer includes a housing 1 with chambers 2 and 3 of heat exchanging clean and polluted media separated by a gas-tight partition 4 in which heat exchange elements 5 are fixed, wound their ends into chambers 2 and 3, and the latter are filled with a pseudo-dispersed dispersed placed on the gas distribution grid 6 nozzle 7, made in the chamber 3 of chopped wood, impregnated with a solution of alkali. The utilizer is equipped with a screw conveyor 8 and a regenerator 9 of the nozzle 7, the latter of which is equipped with supply and discharge nozzles 10 and 11 connected to the chamber 3, and is made in the form of a tank with a tray 12 for an alkali solution, above which the vibrating screen 13 and the sprinkler 14 are placed, connected to the pipeline 15 with the pallet 12, and the conveyor 8 is installed in the outlet pipe 11.

Heat exchange elements 5 are made in the form of heat pipes, and the partition 4, in which they are fixed, is installed with the possibility of rotation on the horizontal shaft 16 and is connected with its ends to the housing 1 by means of flexible inserts 17 made of gas-tight material. Nozzles 18, 19, and 20, 21 are connected to the housing 1 for inlet and outlet of the heated and cooled media.

The utilizer operates as follows.

In the heat recovery mode, the elements 5 are rotated on the shaft 16 so that the heat pipes are inclined toward the chamber 3 for a polluted environment. In this case, the condensate filling the pipes of the agent is returned to the evaporation zones of the heat pipes under the action of gravity. Inserts 17 provide the mobility of the partition 4 without violating its gas tightness. The flow of the contaminated medium is supplied by a fan (not shown) through the nozzle 19 into chamber 3. Pass through the gas distribution grid 6, the flow pseudo-energizes the nozzle 7. As a result of the contact of the medium - the gas with the developed surface of the dispersed nozzle 7, saturated with an alkali solution, cooling occurs and wetting the medium and adsorbing acidic gases contained in its stream. Further flow

the medium passes between elements 5. As a result of direct contact of the gas flow with the latter, the medium is cooled and dried as a result of condensation of water vapor on the surface. The process of condensation of water vapor is accompanied by fine purification of the gas stream from finely dispersed soils. Heated in the process of interaction with the flow of the medium

0 particles of the nozzle 7 transfer heat when they come into contact with elements 5, while partially moistening. Dried nozzles 7 together with trapped dirt particles accumulating at the upper boundary

5 of the fluidized bed 7, the pipe 10 is fed by gravity to the vibrating screen 13 and irrigated with an alkali solution supplied to the irrigator 14 by the pump. Washed nozzle 7 with recovered

0 the adsorption properties of the screw conveyor 8, driven by the drive, moves into the nozzle 11 and the nozzle 7, passing through the regenerator 9, returns to the chamber 3. Alkali solution,

5, the nozzle 7, which is contaminated during the flushing process, is settled in the sump 12 and re-supplied to the sprinkler 14, and the accumulated sludge is discharged through the nozzle. Purified, cooled waste stream

0 of the medium is discharged from the chamber 3 through the pipe 21. The flow of clean medium enters the chamber 2 through the pipe 18. Passing the gas distribution grid 6, it brings the nozzle 7 into a fluidized state. Further, passing through the volume of the nozzle 7 with elements 5 located therein, whose surface heats up as a result of heat transfer generated by condensation of vapors of the agent filling the heat pipes, the flow heats up and is discharged from chamber 2 through nozzle 20. In the cold disposal mode The removed gas medium elements 5 are rotated around the shaft 16 so that the formation of a slope towards the chamber 2. The flow of polluted cold medium is fed into the chamber 3 through the nozzle 19. Pass through the gas distribution grid 6, the flow ps Evacuates nozzle 7, heats up as a result of contact with nozzle 7 and hot ends of heat pipes of elements 5, extracts heat from the stream by the purity of the medium - supply gas, and is removed from chamber 3 through nozzle 21. Contaminated nozzle 7 is washed in the regenerator 9 with solution alkali and returns to chamber 3 in a manner similar to the regeneration cycle carried out during heat recovery. The supply air is heated and clean enters chamber 2 through nozzle 18. Next, the flow passes through

the gas distribution grid 6 and brings the nozzle 7 into a fluidized state. Cooled as a result of contact with the developed surface of the nozzle 7 and the surface of the cold ends of the heat pipes of the elements 5, the flow is removed from the chamber 2 through the nozzle 20.

The use of the described construction allows to intensify the process of heat exchange between the gas flows, which leads to a reduction in the size and material intensity of the heat exchanger. Cleaning of polluted gases, incl. From the acid gases contained in them, the possibility of utilizing the heat and cold of low-grade gases expands the range of possible applications.

Claims (3)

Claim 1. Heat utilizer comprising a housing with chambers of heat exchanging clean and polluted media separated by a partition in which heat exchange elements fixed by their ends into said chambers are fixed, and the latter are filled with a fluidized dispersed nozzle placed on gas distribution grids, characterized by that, in order to increase the efficiency of the process, the nozzle of a contaminated chamber the medium is made of shredded wood impregnated with a solution of alkali. 2. The utilizer according to claim 1, characterized in that it is provided with a conveyor and a nozzle regenerator, the latter of which is supplied with supply and discharge connections connected to the chamber of a polluted medium, and is made in the form of a container with an alkali solution tray above which the vibrating screens are located and The sprinkler is connected to the pallet by a pipeline, and the conveyor is installed in the discharge pipe. one 3. The utilizer according to claim 1, characterized in that the heat exchange elements are made in the form of silver heat pipes, and the partition in which they are fixed is rotatably mounted on a horizontal shaft and connected with its ends to the body by flexible inserts from gas-tight material.