A slag discharge device for primary cooler

Abstract

The present invention relates to a slag discharge device for a primary cooler, comprising a screw conveyor, an upper condensate outlet, a baffle, a liquid cut-off plate, a slag discharge port, a field sight glass, a steam cleaning port, a slag discharge valve and a remote sight glass, wherein the upper portion of the liquid cut-off plate is provided with a baffle, the screw conveyor is arranged in the liquid cut-off plate, the outlet end is connected to the slag discharge port, the slag discharge port is connected to the slag discharge valve, and the slag discharge port is provided with a steam cleaning port; the upper condensate outlet, the field sight glass and the remote sight glass are arranged on the wall of the primary cooler. The beneficial effects are: the generated tar residue can be discharged in time without affecting the normal operation of the primary cooler, avoiding blockage, improving the stability of the operation of the gas system, improving the heat exchange effect and the naphthalene washing effect, reducing water consumption, and having the characteristics of simple structure and convenient operation.

Description

Technical Field

[0001] The invention relates to a slag discharge device in the field of coking technology, in particular to a slag discharge device for a primary cooler. Background Art

[0002] In the field of coking technology, the coal gas in the primary cooler flows from top to bottom in the water pipe, and the condensed tar mist, water mist and tar residue entrained in the coal gas are carried by the coal gas flow to the liquid cut-off plate and discharged from the upper condensate outlet. At present, due to the shortage of coking coal resources and the requirement of smokeless coal loading in coke ovens, the fineness of coking coal has increased, and the negative pressure of the gas collection pipeline has increased, resulting in a large amount of coal powder entering the primary cooler with the raw coal gas, and together with the precipitated naphthalene, it is bonded by tar to form viscous tar residue. The tar residue is seriously blocked at the liquid cut-off plate, causing large equipment resistance, seriously affecting the stable operation of the coal gas system, and accelerating the scaling and corrosion of the equipment, deteriorating the heat exchange effect and naphthalene washing effect, and increasing water consumption. Summary of the invention

[0003] In order to overcome the defects of the prior art, the technical problem solved by the present invention is to provide a slag discharge device for a primary cooler, which can discharge the generated tar slag in time without affecting the normal operation of the primary cooler, avoid blockage, improve the stability of the operation of the gas system, improve the heat exchange effect and naphthalene washing effect, reduce water consumption, and has the characteristics of simple structure and easy operation.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A slag discharge device for a primary cooler, comprising a screw conveyor, an upper condensate outlet, a baffle, a liquid cut-off pan, a slag discharge port, a field sight glass, a steam cleaning port, a slag discharge valve and a remote sight glass, characterized in that the liquid cut-off pan is composed of a liquid blocking part, an inclined part and a groove part, wherein the liquid blocking part is vertically arranged, the inclined part forms an obtuse angle with the liquid blocking part, the groove part and the inclined part have a smooth transition, and the bottom of the groove part is a semicircle welded to the wall of the primary cooler; there are two liquid cut-off pans, which are symmetrically arranged along the center line of the primary cooler, and a spacing is left between the two liquid cut-off pans; the baffle is arranged on the upper part of the liquid cut-off pan, and is a "^"-shaped structure that is symmetrically inclined downward along the center line of the primary cooler The screw conveyor is inclined, and the inclination is parallel to the inclined part of the liquid cut-off plate; the screw conveyor is composed of a motor and a screw conveying part, wherein the motor and the part connected to the wall of the pre-cooler are arranged outside the pre-cooler, and the screw conveying part is arranged in the groove part of the liquid cut-off plate in the pre-cooler; the outlet end of the screw conveyor is connected to the slag discharge port, the slag discharge port is connected to the slag discharge valve, and the slag discharge port is provided with a steam cleaning port, the on-site sight glass and the remote sight glass are respectively arranged on the right and left walls of the pre-cooler at the top of the screw conveyor; there are two upper condensate outlets, which are symmetrically arranged on the wall of the pre-cooler located at the liquid cut-off plate, and their height is located between the inclined part of the liquid cut-off plate and the liquid blocking part.

[0006] A notch is provided on the baffle plate at the groove portion of the liquid cut-off plate, that is, at the end of the inclined portion of the baffle plate.

[0007] The diameter of the bottom semicircle of the groove portion of the liquid cut-off plate is designed to match the diameter of the spiral conveying portion of the spiral conveyor.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1) The accumulated tar residue can be discharged in time without stopping the operation, avoiding blockage that affects the stability of the system and the heat exchange effect. The structure is simple and the operation is convenient;

[0010] 2) A notch is set at the inclined end of the baffle to facilitate the coal gas to carry the tar residue to the groove of the liquid cut-off plate for subsequent discharge;

[0011] 3) The unique structure of the liquid cut-off plate has a gravity sedimentation effect, which accumulates the tar residue in the groove part. The groove is composed of a semicircle that is adapted to the screw conveyor. The tar residue can be accumulated around the screw conveyor, which is convenient for the screw conveyor to discharge;

[0012] 4) The coal gas comes into contact with the condensate accumulated in the liquid cut-off plate. Due to the inertia of the tar residue, the tar residue carried by the coal gas can be further reduced;

[0013] 5) Due to gravity sedimentation of tar residue, the position of the upper condensate outlet is set to discharge relatively clean condensate;

[0014] 6) The remote viewing mirror can be used for remote monitoring in the central control room, and the on-site viewing mirror can be used on-site, which is convenient for observation and timely and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structural principle of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the AA structure;

[0017] Figure 3 It is a structural schematic diagram of the liquid cut-off plate of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the baffle of the present invention.

[0019] In the figure: 1- screw conveyor 2- upper condensate outlet 3- baffle 4- liquid cut-off plate 41- liquid blocking part 42- inclined part 43- groove part 5- slag discharge port 6- on-site sight glass 7- steam cleaning port 8- slag discharge valve 9- remote sight glass 10- motor 11- screw conveyor part DETAILED DESCRIPTION

[0020] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0021] See Figure 1-Figure 4 As shown, the present invention relates to a slag discharge device for a primary cooler, comprising a screw conveyor 1, an upper condensate outlet 2, a baffle 3, a liquid cut-off pan 4, a slag discharge port 5, a field sight glass 6, a steam cleaning port 7, a slag discharge valve 8 and a remote sight glass 9, wherein the liquid cut-off pan 4 is composed of a liquid blocking portion 41, an inclined portion 42 and a groove portion 43, wherein the liquid blocking portion 41 is vertically arranged, the inclined portion 42 forms an obtuse angle with the liquid blocking portion 41, the groove portion 43 and the inclined portion 42 are smoothly transitioned, and the bottom of the groove portion 43 is a semicircular structure welded to the wall of the primary cooler; there are two liquid cut-off pans 4, which are symmetrically arranged along the center line of the primary cooler, and a spacing is left between the two liquid cut-off pans 4 for a gas channel; the baffle 3 is arranged on the upper part of the liquid cut-off pan 4, and is a "^"-shaped structure that is symmetrically inclined downward along the center line of the primary cooler, and the inclined portion 42 is arranged at a distance from the bottom of the pan. The slope is parallel to the inclined part 42 of the liquid cut-off plate 4; the screw conveyor 1 is composed of a motor 10 and a screw conveying part 11, wherein the motor 10 and the part connected to the wall of the pre-cooler are arranged outside the pre-cooler, and the screw conveying part 11 is arranged in the groove part 41 of the liquid cut-off plate 4 in the pre-cooler; the outlet end of the screw conveyor 1 is connected to the slag discharge port 5, the slag discharge port 5 is connected to the slag discharge valve 8, and the slag discharge port 5 is provided with a steam cleaning port 7, the on-site viewing mirror 6 (for on-site observation) and the remote viewing mirror 9 (for remote monitoring in the central control room) are respectively arranged on the right and left walls of the upper pre-cooler of the screw conveyor 1; the upper condensate outlet 2 is two, symmetrically arranged on the wall of the pre-cooler located at the liquid cut-off plate 4, and its height is located between the inclined part 42 of the liquid cut-off plate 4 and the liquid blocking part 41.

[0022] The baffle plate 3 is provided with a notch at the groove portion 43 of the liquid cut-off plate 4, that is, at the end of the inclined portion of the baffle plate 3.

[0023] The diameter of the bottom semicircle of the groove portion 43 of the liquid cut-off plate 4 is designed to match the diameter of the spiral conveying portion 11 of the spiral conveyor 1 , ensuring that the bottom of the groove portion 43 can accommodate the spiral conveying portion 11 of the spiral conveyor 1 .

[0024] During operation, the coke oven gas flows from top to bottom in the primary cooler. After being distributed by the baffle 3, the gas passes through the notch on the baffle 3 and transports the carried condensate and tar residue to the liquid cut-off tray 4. Part of the condensate and tar residue directly fall into the groove part 43, and another part is separated from the inclined part 42 and the accumulated condensate surface by impact. The condensate and tar residue are separated by gravity sedimentation in the liquid cut-off tray 4. The tar residue accumulates in the groove part 43 along the inclined part 42, and the condensate floats up. The liquid level is controlled in the liquid blocking part 41, and the upper condensate outlet 2 can discharge relatively clean condensate. The gas separated from the condensate and tar residue leaves through the channel between the liquid cut-off trays 4.

[0025] Through the remote transmission sight glass 9 (the on-site sight glass 6 is used as a backup for on-site observation), when the tar residue accumulates more in the groove part 43, the slag discharge valve 8 is opened and the screw conveyor 1 is started to discharge the tar residue from the primary cooler in time. The tar residue blockage problem can be solved without stopping the operation, avoiding the blockage affecting the system stability and heat exchange effect, and has the advantages of simple structure and easy operation.

Claims

1. A primary cooler slag discharge device, comprising a screw conveyor, an upper condensate outlet, a baffle, a liquid cut-off plate, a slag discharge port, a field sight glass, a steam cleaning port, a slag discharge valve and a remote sight glass, characterized in that: The liquid-blocking plate is composed of a liquid-blocking part, an inclined part and a groove part, wherein the liquid-blocking part is vertically arranged, the inclined part forms an obtuse angle with the liquid-blocking part, the groove part and the inclined part have a smooth transition, and the bottom of the groove part is a semicircle welded to the wall of the primary cooler; there are two liquid-blocking plates, which are symmetrically arranged along the center line of the primary cooler, and a spacing is left between the two liquid-blocking plates; the baffle is arranged on the upper part of the liquid-blocking plate, and is a "^"-shaped structure that is symmetrically inclined downward along the center line of the primary cooler, and the inclination is parallel to the inclined part of the liquid-blocking plate; the screw conveyor is electrically driven The present invention is composed of a pre-cooler and a screw conveying part, wherein the motor is arranged outside the pre-cooler, and the screw conveying part is arranged in the groove part of the liquid cut-off plate in the pre-cooler; the outlet end of the screw conveyor is connected to the slag discharge port, the slag discharge port is connected to the slag discharge valve, and the slag discharge port is provided with a steam cleaning port, and the on-site sight glass and the remote sight glass are respectively arranged on the right and left walls of the pre-cooler at the upper part of the screw conveyor; the upper condensate outlet is two, which are symmetrically arranged on the pre-cooler wall located at the liquid cut-off plate, and the height thereof is located between the inclined part of the liquid cut-off plate and the liquid blocking part; A notch is provided on the baffle plate at the groove portion of the liquid cut-off plate, that is, at the end of the inclined portion of the baffle plate; The diameter of the bottom semicircle of the groove portion of the liquid cut-off plate is designed to match the diameter of the spiral conveying portion of the spiral conveyor.

Images