SU1673587A1 - Coke quencher - Google Patents

Abstract

The invention relates to the coke industry and simplifies the design of the plant and increases the efficiency of heat utilization. The coke quenching plant comprises a tower, a coke irrigator 3 installed therein, and condensation water distributors made in the form of perforated trays 6 and 7 and a catchment tray 5 located below them with a drain pipe, a sump 26 connected to the coke drier, and a sump 23 condensation water connected through the heat exchanger 29 and the pressure collection 8 with the overflow line 9 to the last stage of the condenser water distributor, while the catchment tray and distributors are located coaxially over each other with alternately forming a gap with the wall of the tower and adjoining it, the catchment and perforated trays are made with axial holes, the installation is equipped with a switch 22 located at the end of the drain pipe and connected to the settling tanks, as well as butterfly valves 11, 13 and 15, one of which is installed above the catchment tray, and its ends are located above its inner side walls, the flaps 11 and 13 are installed in the axial bore of the distributors located with gaps relative to the tower wall, and the flap 11 is located ena in the upper part of the tower and is made with a section equal to its cross section. 1 il.

Description

(21) 4644848/26 (22) 12.28.88 (46) 08.30.91. Bul №32

(71) All-Union State Research and Design Institute of VNIPIEnergoprom

(72) A.A. Mikhaylenko, B.C. Semenov, Yu.D. Timofeev, K.S. Moskvitin and A.A. Kulik

(53) 662.741 (088.8)

(56) USSR Author's Certificate ISfe 1581733, cl. From 10 to 39/04, 1987.

(54) INSTALLATION FOR COKE EXTINCTION

(57) The invention relates to the coke-chemical industry and makes it possible to simplify the installation design and to increase the efficiency of heat utilization. The coke quenching plant contains a tower. installed in it sprinkler 3 coke and condensing water distributors made in the form of perforated trays 6 and 7, and a catchment tray 5 located under them with a drain pipe, a sump 25 connected to the sprinkler

coke and a sump 23 of hot condensation water connected through a heat exchanger 29 and a pressure sump 8 with an overflow line 9 to the last stage of the condensation water distributor, while the catchment tray and the distributors are located coaxially above each other with alternate formation of a gap with the tower wall and adjoining It, the catchment and perforated trays are made with axial holes, the installation is equipped with a switch 22 located at the end of the drain pipe and attached to the sumps also rotatable elephants 11, 13 and 15, one of which is installed above the catchment tray, and its ends are located above its inner side walls, the flaps 11 and 13 are installed in the axial bore of the distributors located with gaps relative to the tower wall and made with a cross section equal to its cross section. 1 il.

(L

WITH

about vj

CJ

ate with VJ

The invention relates to the coking industry, namely to the equipment for coke wet quenching plants.

The purpose of the invention is to simplify the installation design and increase the efficiency of heat utilization.

The drawing shows a diagram of a coke quencher.

The installation contains an extinguishing chamber 1, in which an irrigation device 3 is placed above the extinguishing car 2. The condensation or mixing condenser of vapor produced during extinguishing coke includes two jet bundles of condensation water, which are formed concentrically with it in the chamber or chimney 4 of the tower ring collector 5 and perforated trays 6 and 7 are arranged one above the other with 10 to 20 concentric rows of holes arranged in a checkerboard pattern. At the same time, the collector 5 and the tray 7 are installed with an annular gap with respect to the walls of the exhaust pipe 4, and the tray 6 with its side wall adjoins the walls of the pipe 4 without forming a gap.

Pressure container 8 with overflow line 9 and automatically controlled valve 10 is located above the upper distribution tray 7 and serves to accumulate and supply condensation water to the upper tray 7. The valve 11, installed with the possibility of rotation around the axis 12, is horizontal in position to seal the upper parts of the exhaust pipe 4. The flap 13, rotatable around the axis 14, horizontally overlaps the central flow area of the upper chute 7. The flap 15, fixed on the axis 16, is located from the inside morning side wall of the collector 5 at a height equal to not less than a quarter of the inner diameter of the collector (h 0,250), and in a horizontal position overlaps the free internal section of the jet annular flow of water formed using a perforated tray 6.

The fan 17 is designed to remove air and overcome the resistance to the movement of steam through the cascades of the jets. Temperature controller 18 with temperature sensor 19 controls valve 10. Temperature sensor 20 controls temperature switch 21 by means of a switch or distribution mechanism 22, which guides the water coming from collector 5 depending on its temperature. septic tanks 23 with removable lids 24 of high-temperature clarified water 24 or into low-temperature sumps 25 with a collector 26, which are closed with removable lids. The pump 27 is designed to periodically supply the irrigation device 3 with water, The second one from the quenching car 2 flows into the sump 25. The pump 28 serves to continuously supply water with a temperature of 90–97 ° C through the heat exchanger 29 to the collector 8, feeding, if necessary, with water from the collector 26 via the bypass line with the stop valve 30. Valves 31 and 32 are installed on the pressure pipelines of the pump 27 to enable the water supply to the irrigation device 3 to be shut off and the water to the collector 8 to return.

The accumulator tanks 33 and 34 are placed at the inlet and outlet of the supply water from the heat exchanger 29 to equalize its consumption in heat-receiving and heat-consuming utilities.

The installation works as follows.

By the beginning of the coke quenching cycle, the collection 8 is filled with water, the flaps 11, 13 and 15 are installed in a horizontal position. After being placed in the chamber 1 of the quenching car 2 with hot coke, the pump 27 supplies the quenching water according to the standard scheme to the irrigation device 3. The resulting steam fills the underwater space of chamber 1, and when the air-steam mixture reaches the temperature (60 60–80 °) C turns on the fan 1.7. The vapor mass separating out rises through the exhaust pipe 4, displaces the air and increases the PVA temperature. Simultaneously with the fan 17 turning on and the signal from the temperature sensor 19 through the regulator 18 go to the control the valve 10 from the collector 8 opens the water supply to the upper perforated tray 7, evenly distributing its flow with two - four jets and washing from the perforated bottom possible deposits of coke breeze.

Perforated trays 7 and 6 carry out the simplest jet splitting of water using holes of sufficiently large size (d 0.01–0.03 m), which is necessary to reduce the likelihood of clogging.

The main mass of steam rises through the annular space between the walls of the exhaust pipe 4 and the collector 5, the level of non-uniformity of the vapor release of the cooled coke in the process of movement, falls on the annular jet beam of condensation water formed by the tray 6 and passes in a zigzag manner in the transverse direction through the row of the jet and Mostly (up to 60 - 80%) it condenses at this second stage of water heating or the first stage of steam condensation. Here, precipitation of water droplets and coconut dust occurs, which is washed through collector 5 into septic tanks 23 and 25.

When the PVA temperature reaches 100 ° C and higher, the water in the first-stage condensation jet cascade warms up to 95 - 98 ° C. Heat and mass transfer in the last few steam streams may be degraded due to lack of steam. These rows are heated by the core of the vapor cloud in the lower part of the peripheral area of the valve 15 due to a decrease in the resistance to vapor movement under the influence of the fan of the fan 17 in the central area of the ring collector 5 and in the annular zone of movement of the water jets directly adjacent to the edges of the valve 15.

The remaining steam through the internal flow area of the tray 6 enters the water jets formed by the tray 7, and condenses on them, carrying out an initial heating of the water. Air and non-condensable gases from the quenching tower during steam generation and until the end of the condensation process are pumped out by the fan 17 for chemical or thermal treatment to trap or burn the harmful substances produced during the quenching of the coke.

The water flowing down from the collector 5 with a temperature of less than 85 - 95 ° C, when the corresponding signal from the temperature sensor 20 and temperature controller 21 is received, is transferred by the switch 22 to a sump 25, where it is freed from suspended particles and filtered into a collector 26 for periodic pumping 27 at. irrigation device 3. The main part of the water (80 - 90%) when its temperature rises, switches 22 to the sump 23, from where it is filtered into the collector 24 and continuously fed by the pump 28 through the heat exchanger 29 to the pressure collector 8. In case of insufficient water 24, the operation of the switch 22 is corrected by the temperature controller 21 in order to lower the temperature threshold and increase the amount of water entering the collector 24, or part of the water is withdrawn from the collector 26 via the bypass line with the valve 30. In this case, the low-temperature water in the sump 25 and the collector 26, in excess of the permissible part, is periodically pumped into the pressure collector 8, the heat exchanger 29 mines. For this purpose, the pump 27 is put into operation with the valve 31 closed and the valve 32 open. Loss of water with moistened coke and evaporation in the environment is compensated for by the addition of fresh water to the collection 8. The sludge from the settling tanks 23 and 25 is discharged in a known manner by means of a grapple.

The net water in front of the heat exchanger 29 accumulates in the tank 33. Consumers of low-grade heat (heating, ventilation, hot water, greenhouses, ponds, sewage evaporators, process and third-party consumers, etc.) receive it in the form of network water with a temperature of 75 - 85 ° C out of tank 34.

If the heat removal in the heat transfer system by consumers is disturbed, the temperature of the condensation water rises, and the steam condensation deteriorates. For dispersed heat dissipation into the surrounding space and using the quenching tower as a cooling tower during the periods between the coke cooling processes, water should be continuously circulated around the circuit: pump 28 - collector 8 - trays 7 and b - sump 23, or along a specially designed circuit with the translation of the butterfly valves 11, 13 and 15 in a vertical position.

Claims (1)

Invention Formula A coke quenching plant containing a tower, a coke irrigator installed in it, and condensation water distributors, made in the form of perforated trays, and a catchment tray with a drain pipe located below them, a sump connected to the coke drier, and a hot condensation water trap connected through a heat exchanger and pressure collector to the last stage of the condenser water distributor, a fan connected to the upper part of the tower, in order to simplify the design and increase efficient use of heat, catchment tray and distributors are located coaxially above each other with alternate formation of a gap with the wall of the tower and adjoining it, the catchment and perforated trays are made with axial holes, the installation is equipped with a switch located at the end of the drain pipe and attached to the sumps, also rotary valves, one of which is installed above the catchment tray, and its ends are located above its inner side walls, the following valves are installed in the axis m opening valves located with gaps relative to the wall of the tower, the upper part of the tower and made with a section, with the latter valve located in it, equal to its cross section.