Primary cooler spraying device easy to clean and using method thereof

Abstract

The invention belongs to the technical field of primary coolers, and particularly relates to a primary cooler spraying device easy to clean and a using method thereof.The primary cooler spraying device easy to clean is characterized in that the primary cooler spraying device comprises a spraying pipe, a sleeve connecting flange, a pipe end limiting plate, a pull rod, a slag removing plate and a supporting ring, and the spraying pipe is connected with a sleeve on the side wall of a primary cooler through the sleeve connecting flange; a plurality of spraying holes are distributed in the lower side wall of the spraying pipe, a pipe end limiting plate is arranged at the end of the spraying pipe and shields the upper half portion of the pipe end of the spraying pipe, a drawing rod is arranged in the spraying pipe, a supporting ring is arranged on the drawing rod, a slag removing plate is arranged at the front end of the drawing rod, and an operation cone is arranged at the rear end of the drawing rod. The spray pipe has the beneficial effects that the spray pipe can be unblocked without being disassembled, and the problems that in the prior art, due to the fact that spray liquid contains many impurities, the spray pipe is prone to being blocked, the cooling, naphthalene removal and dust removal effects of a primary cooler are reduced, naphthalene and dust are carried into the subsequent process along with coal gas, and normal operation of a system is affected are effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of primary coolers, and particularly relates to an easy-to-clean spraying device for a primary cooler and a using method thereof. Background Art

[0002] The primary cooler is mainly used for cooling the coke oven gas in the purification process to meet the production requirements. Most of the water vapor, tar, and naphthalene in the gas are condensed, providing guarantee for the subsequent process.

[0003] Most coking plants use horizontal tube primary coolers. During actual operation, a large amount of substances such as tar, naphthalene, and pulverized coal will adhere to the cooling tubes of the primary cooler, reducing the area of the gas passage to a certain extent and increasing the resistance of the equipment. According to the principle of similar solubility, a light tar spraying device is usually arranged above the cooling tubes to clean the heavy tar, naphthalene and other impurities accumulated on the heat transfer tubes and the inner wall of the primary cooler.

[0004] However, a problem exists that impurities such as tar, coke powder, and pulverized coal in the light tar and rust accumulated in the pipeline will cause the spraying device to be frequently blocked. Especially the end of the spraying pipe is a dead zone, and the accumulation of impurities causes the distal spraying holes to be blocked, reducing the spraying amount. The tar, naphthalene, etc. outside the heat exchange tubes accumulate more and more, resulting in an increase in the resistance of the primary cooler. At this time, the spraying device needs to be disassembled and cleaned by means of steam purging, manual knocking, digging, chemical agents or even cutting, which is time-consuming, laborious and has extremely low efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide an easy-to-clean spraying device for a primary cooler and a using method thereof, overcoming the deficiencies of the prior art, adopting a pure manual operation structure, solving the problems of blockage of the spraying device caused by a large amount of impurities in the light tar and poor naphthalene removal effect of the primary cooler, and only simple mechanical operations are required to complete the blockage cleaning, and the operation is very convenient.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] Technical solution one: An easy-to-clean spraying device for a primary cooler, including a spraying pipe, a sleeve connection flange, a pipe end limiting plate, a pull rod, a slag cleaning plate, and a support ring. The spraying pipe is connected to the sleeve on the side wall of the primary cooler through the sleeve connection flange. A plurality of spraying holes are arranged on the lower side wall of the spraying pipe. A pipe end limiting plate is arranged at the end of the spraying pipe, and the pipe end limiting plate covers the upper half of the pipe end of the spraying pipe, and the lower half of the pipe end is open; a pull rod is arranged in the spraying pipe, a support ring is arranged on the pull rod, a slag cleaning plate is arranged at the front end of the pull rod, and an operation cone that can be held by hand is arranged at the rear end of the pull rod.

[0008] Further, the spraying pipe, the pipe end limiting plate, the pull rod, the slag cleaning plate, the support ring, and the operation cone are all made of stainless steel.

[0009] Furthermore, the shapes of the spraying holes include, but are not limited to, circular, elliptical, triangular, and square shapes.

[0010] Furthermore, the height of the pipe end limiting plate is greater than the radius.

[0011] Furthermore, the support ring is in sliding fit with the inner wall of the spraying pipe.

[0012] Furthermore, the slag cleaning plate is a solid circular plate, and an elastic rubber ring is embedded at the edge of the circular plate.

[0013] Furthermore, the support ring is composed of a cross brace inside and an elastic circular ring connected outside.

[0014] Furthermore, the operating cone is a cone with the tip facing outward, and its surface is provided with elastic patterns for increasing friction and preventing slippage.

[0015] Technical solution two: A method for using an easily cleanable primary cooler spraying device, characterized in that the specific operation steps are as follows:

[0016] 1) Install the spraying pipe. Open a hole on the side wall of the primary cooler and install a sleeve. Connect the spraying pipe to the sleeve through a sleeve connection flange to form a detachable sleeve structure;

[0017] 2) Install the pull rod. Install the pull rod in the spraying pipe and push the pull rod to the innermost end;

[0018] 3) Install the spraying liquid pipeline. Connect the spraying liquid pipeline to the pipeline flange on the spraying pipe. Leave the pull rod in the spraying pipe, and the spraying liquid flows out from the spraying holes to clean the structure of the primary cooler below;

[0019] 4) When it is necessary to clean the spraying holes, stop the supply of the spraying liquid, open the pipeline flange, and push and pull the pull rod several times.

[0020] Furthermore, the pull rod is operated regularly or when the spraying liquid flow rate drops by 30%.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1) The spraying pipe can be unclogged without being disassembled, effectively solving the problems existing in the prior art that due to the high impurity content of the spraying liquid, it is easy to cause blockage of the spraying pipe, resulting in a reduction in the cooling, naphthalene removal, and dust removal effects of the primary cooler, and naphthalene and dust are carried to the subsequent processes with the gas, affecting the normal operation of the system;

[0023] 2) The structure is simple and novel, the operation is convenient, the efficiency is high, and the investment is saved;

[0024] 3) The spraying pipe is a detachable sleeve structure, which is convenient for maintenance;

[0025] 4) It can be modified on the basis of the existing spraying pipes of the primary cooler, with wide applicability. Description of the Drawings

[0026] Figure 1 is a schematic diagram of the usage state of the embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the assembled structure of the spraying pipe and the draw rod in the embodiment of the present invention;

[0028] Figure 3 is Figure 1 the sectional view along line A-A in

[0029] Figure 4 is Figure 1 the sectional view along line B-B in

[0030] Figure 5 is Figure 1 the sectional view along line C-C in.

[0031] In the figure: 1-side wall of the primary cooler, 2-spraying pipe, 3-casing connection flange, 4-spraying hole, 5-pipe end limiting plate, 6-draw rod, 7-slag cleaning plate, 8-supporting ring, 9-operation cone, 10-pipeline flange, 11-casing. Detailed Embodiments

[0032] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments.

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the specific embodiments required for use in the description of the specific embodiments or the prior art. Obviously, the specific embodiments described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other specific embodiments can also be obtained based on these specific embodiments.

[0034] Generally, the components of the embodiments of the present invention described and shown in the specific embodiments here can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention.

[0035] Such as Figures 1-5, is a schematic structural diagram of an embodiment of a spraying device for an initial cooler that is easy to clean according to the present invention, including a spraying pipe 2, a casing connection flange 3, a pipe end limiting plate 5, a pulling rod 6, a slag cleaning plate 7, and a support ring 8. The spraying pipe 2 is connected to the casing on the side wall of the initial cooler through the casing connection flange 3. A plurality of spraying holes 4 are arranged on the lower side wall of the spraying pipe 2. A pipe end limiting plate 5 is provided at the end of the spraying pipe 2. The pipe end limiting plate 5 covers the upper half of the pipe end of the spraying pipe 2, and the lower half of the pipe end is open. The height of the pipe end limiting plate 5 is greater than the radius. The lower half opening is used to push out fine accumulated slag from the opening when cleaning the slag. A pulling rod 6 is provided inside the spraying pipe 2. A support ring 8 is provided on the pulling rod 6. A slag cleaning plate 7 is provided at the front end of the pulling rod 6, and an operation cone 9 that can be held by hand is provided at the rear end of the pulling rod 6.

[0036] To extend the service life, the spraying pipe 2, the pipe end limiting plate 5, the pulling rod 6, the slag cleaning plate 7, the support ring 8, and the operation cone 9 are all made of stainless steel. The main reason is that the spraying liquid (light tar) is essentially a mixture of tar and ammonia water, which is corrosive. Stainless steel is more durable. The inner corrosion residue in the carbon steel pipe easily causes the inner diameter to decrease and the fluid resistance to increase, resulting in an increase in the friction coefficient, which is not conducive to fluid flow, and the pulling rod 6 is laborious to use, and the sealing performance of the slag cleaning plate 7 is also affected.

[0037] The shape of the spraying holes 4 includes but is not limited to circular, elliptical, triangular, and square, as long as it does not affect the passage of the spraying liquid. The diameter of the pulling rod 6 should be greater than 6 mm to ensure the use strength.

[0038] The support ring 8 is in sliding fit with the inner wall of the spraying pipe 2 to reduce resistance. The support ring 8 is composed of a cross support inside and an elastic ring connected outside. The cross support does not affect the passage of the spraying liquid. The support ring 8 can prevent the pulling rod 6 from vibrating during spraying operation and also avoid bending caused by eccentricity during pulling. The support ring 8 is closely combined with the spraying pipe 2, which can play a supporting and shock-absorbing role, and also avoid bending caused by eccentricity when the pulling rod 6 is used. To not affect normal spraying, the support ring 8 must be before the spraying holes and is arranged at the entrance of the spraying pipe near the casing connection flange 3.

[0039] The slag cleaning plate 7 is a solid circular plate, and an elastic rubber ring is inlaid on the edge of the circular plate, which is closely combined with the spraying pipe 2 and has better sealing performance. The slag cleaning plate 7 should be as close as possible to the pipe end limiting plate 5. The operation cone 9 is a cone with the cone tip facing outwards, and its surface is provided with elastic patterns to increase friction and prevent slipping. The operation cone 9 is a cone, and the advantages are as follows: the top of the cone is rounded to avoid danger when used by personnel; the bottom of the cone is an elastic material layer to drive the pulling rod, which is convenient for personnel to operate during maintenance; during spraying, the operation cone 9 is inside the spraying liquid pipeline, and the conical shape can minimize the fluid resistance loss.

[0040] The pipe end limiting plate 5 is circular in shape after excision and has an opening at the lower part, which has two advantages: a. It will not form a negative pressure structure, causing difficulties in the operation of the pull rod 6; b. The fine impurities that cannot be carried out by the slag cleaning plate 7 can be directly pushed into the equipment interior. The incision position is below the center line of the circular pipe, enabling a large contact surface between the slag cleaning plate 7 and the pipe end limiting plate 5 to ensure tightness.

[0041] The specific operation steps of the usage method of a primary cooler spraying device that is easy to clean according to the present invention are as follows:

[0042] 1) Install the spraying pipe 2. Drill a hole in the side wall 1 of the primary cooler and install the sleeve 11. Connect the spraying pipe 2 to the sleeve 11 through the sleeve connection flange 3 to form a detachable sleeve structure;

[0043] 2) Install the pull rod 6. Install the pull rod 6 in the spraying pipe 2 and push the pull rod 6 to the innermost end;

[0044] 3) Install the spraying liquid pipeline. Connect the spraying liquid pipeline to the pipeline flange 10 on the spraying pipe 2. The pull rod 6 remains in the spraying pipe 2, and the spraying liquid flows out from the spraying holes 4 to clean the primary cooler structure below;

[0045] 4) When it is necessary to clean the spraying holes 4, stop the supply of the spraying liquid, open the pipeline flange 10, and push and pull the pull rod 6 several times. The slag cleaning plate 7 can physically carry out impurities such as coke powder, coal powder, and asphalt slag in the spraying pipe. The operation of the pull rod 6 can be arranged regularly or can also be carried out when the spraying liquid flow rate drops by 30%.

[0046] In the embodiment, the slag cleaning plate 7, the support ring 8, and the operation cone 9 all use elastic materials. Since the above-mentioned parts are all in contact with the spraying liquid, the operating temperature of the spraying liquid is ~75°C, and the operating pressure is generally not greater than 0.8 MPa. Therefore, the elastic material is preferably selected from materials with good elasticity, temperature resistance, corrosion resistance, good impact resistance, and stable types, such as polyoxymethylene, polyoxymethylene, etc.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An easy-to-clean primary cooler spraying device, characterized in that: It includes a spray pipe, a sleeve connecting flange, a pipe end limit plate, a pull-out rod, a slag cleaning plate and a support ring. The spray pipe is connected to the sleeve on the side wall of the pre-cooler through the sleeve connecting flange. A plurality of spray holes are arranged on the lower side wall of the spray pipe. A pipe end limit plate is provided at the end of the spray pipe. The pipe end limit plate blocks the upper half of the pipe end of the spray pipe, and the lower half of the pipe end is open. A pull-out rod is provided in the spray pipe, and a support ring is provided on the pull-out rod. A slag cleaning plate is provided at the front end of the pull-out rod, and a hand-held operating cone is provided at the rear end of the pull-out rod.

2. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The spray pipe, pipe end limit plate, pull rod, slag cleaning plate, support ring and operating cone are all made of stainless steel.

3. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The shapes of the spray holes include, but are not limited to, circular, elliptical, triangular and square.

4. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The height of the pipe end limiting plate is greater than the radius.

5. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The support ring is slidably matched with the inner wall of the spray pipe.

6. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The slag cleaning plate is a solid circular plate, and an elastic rubber ring is inlaid on the edge of the circular plate.

7. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The support ring is composed of an internal cross support frame and an externally connected elastic ring.

8. The easy-to-clean primary cooler spraying device according to claim 1, characterized in that: The operating cone is a cone with the cone tip facing outwards, and its surface is provided with elastic patterns for increasing friction and preventing slipping.

9. A method for using an easy-to-clean primary cooler spray device, characterized in that: The specific steps are as follows: 1) Install the spray pipe, drill a hole on the side wall of the pre-cooler and install a sleeve, connect the spray pipe to the sleeve through the sleeve connecting flange to form a detachable set structure; 2) Install the pull-out rod. Install the pull-out rod in the spray pipe and push it to the innermost end; 3) Install the spray liquid pipeline, connect the spray liquid pipeline with the pipeline flange on the spray pipe, leave the pull rod in the spray pipe, and the spray liquid flows out from the spray hole to clean the primary cooler structure below; 4) When the spray hole needs to be cleaned, stop the spray liquid supply, open the pipe flange, and push and pull the pull rod several times.

10. The method for using the easy-to-clean primary cooler spraying device according to claim 9, characterized in that: The pull-out rod is operated periodically or when the spray liquid flow rate drops by 30%.

Images