Dry quenching environment dust removal system

Abstract

The utility model discloses a dry quenching environment dust removal system which comprises a pulse bag type dust remover and a heat storage cooler, and a quick cut-off valve is arranged on a pipeline between an air inlet of the pulse bag type dust remover and an air outlet of the heat storage cooler. The rapid cut-off valve is in electric signal connection with a dust removal fan of the pulse bag type dust remover or a hydrogen content monitor arranged in a dry quenching furnace or a circulating fan of a dry quenching system, and when the dust removal fan and the circulating fan stop running, the controller controls the rapid cut-off valve to close a cut-off pipeline. When the hydrogen content monitor detects that the hydrogen content in the dry quenching furnace exceeds the standard, the controller controls the quick cut-off valve to close and cut off the pipeline; according to the utility model, the quick cut-off valve is arranged on the pipeline between the outlet of the heat storage cooler and the inlet of the pulse bag type dust collector, so that the possibility of explosion of the dust removal system is reduced, and the overall stability of the dust removal system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry coke quenching dust removal, in particular to a dry coke quenching environmental dust removal system. Background Art

[0002] Coke Dry Quenching (CDQ) is the mainstream quenching technology in the current coking market, and its matching dust removal system has also become the focus of attention.

[0003] The dust removal system is mainly composed of dust removal pipelines, heat storage coolers, pulse bag dust collectors, dust removal fans, silencers, dust cleaning equipment and ash conveying equipment. The flue gases treated by the dust removal system mainly include the flue gas generated when coke is loaded on the top of the CDQ furnace, the flue gas released by the pressure adjustment of the pre-storage chamber at the top of the CDQ furnace, and the flue gas generated when coke is discharged from the bottom of the CDQ furnace. These flue gases are mixed and enter the CDQ environmental dust removal system. Due to the characteristics of CDQ flue gas such as many types, large flue gas volume and high flue gas temperature, and if the maturity of the coke is not enough, the flue gas will contain a large amount of combustible components, and the interfaces between the above-mentioned dust source points and the dust collector are all connected to the atmosphere. The mixture of the two can easily cause the dust removal system to explode.

[0004] In recent years, due to the improvement of national environmental protection requirements, the market demand for dust removal systems has increased, and the incidence of dust collector explosions has also increased. The dust removal system is the main auxiliary facility for CDQ. The dust removal pipeline is connected to the CDQ furnace body and is closely connected to the operating conditions of the CDQ process. At the same time, the operating status of the dust removal system directly affects the operation and production of the CDQ furnace.

[0005] The combustible components in the flue gas generated when the CDQ furnace is loaded with coke are directly related to the maturity of the coke. The lower the maturity of the coke, the higher the combustible volatile components in the flue gas. The amount of flue gas during coke loading is large. Under the action of thermal buoyancy, this part of the flue gas will carry a large amount of coke powder. Driven by the dust removal fan in the dust removal system, the coke powder at nearly 1000°C will enter the dust removal pipeline in the form of "sparks". If the dust removal fan fails at this time, but it is still running under inertia before the dust removal fan stops, it will reduce the flow rate of the flue gas and reduce the collision between the flue gas and the heat storage cooler, so that a large number of sparks enter the pulse bag dust collector and explode when in contact with the air.

[0006] In summary, improving the operational stability of the dust removal system in the coke quenching environment and preventing the occurrence of explosions are technical problems that technical personnel in this field urgently need to solve. Utility Model Content

[0007] The utility model aims to provide a dust removal system for a dry coke quenching environment to solve the problems existing in the above-mentioned prior art, improve the stability of the dust removal system and reduce the risk of explosion.

[0008] To achieve the above purpose, the utility model provides the following solutions:

[0009] The utility model provides a dust removal system for a dry coke quenching environment, comprising a pulse bag dust collector and a heat storage cooler, wherein a quick shut-off valve is arranged on a pipeline between an air inlet of the pulse bag dust collector and an air outlet of the heat storage cooler, wherein the quick shut-off valve is electrically connected to a dust removal fan of the pulse bag dust collector or a hydrogen content monitor arranged in a dry quenching furnace or a circulating fan of a dry coke quenching system by signal, wherein when the dust removal fan and the circulating fan stop running, a controller controls the quick shut-off valve to close and cut off the pipeline, and when the hydrogen content monitor measures that the hydrogen content in the dry quenching furnace exceeds a standard, the controller controls the quick shut-off valve to close and cut off the pipeline.

[0010] Preferably, the air inlet of the heat storage cooler is connected to a coke loading flue gas duct and a coke exhausting flue gas duct.

[0011] Compared with the prior art, the utility model has achieved the following beneficial technical effects:

[0012] The dry coke quenching environmental dust removal system provided by the utility model reduces the possibility of explosion of the dust removal system and improves the overall stability of the dust removal system by installing a quick cut-off valve on the pipeline between the outlet of the heat storage cooler and the inlet of the pulse bag dust collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the dust removal system for the dry coke quenching environment in the utility model;

[0015] In the figure: 1. Pulse bag dust collector; 2. Heat storage cooler; 3. Quick shut-off valve; 4. Coke loading flue gas duct; 5. Coke exhaust flue gas duct. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model aims to provide a dust removal system for a dry coke quenching environment to solve the problems existing in the prior art.

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] The dust removal system for the dry coke quenching environment in this embodiment is as follows: Figure 1 As shown, it includes a pulse bag dust collector 1 and a heat storage cooler 2. A quick shut-off valve 3 is arranged on the pipeline between the air inlet of the pulse bag dust collector 1 and the air outlet of the heat storage cooler 2. The quick shut-off valve 3 is electrically connected to the dust removal fan of the pulse bag dust collector 1 or the hydrogen content monitor arranged in the dry quenching furnace or the circulating fan of the dry quenching system. When the dust removal fan and the circulating fan stop running, the controller controls the quick shut-off valve 3 to close and cut off the pipeline. When the hydrogen content monitor measures that the hydrogen content in the dry quenching furnace exceeds the standard, the controller controls the quick shut-off valve 3 to close and cut off the pipeline.

[0020] In this specific embodiment, the air inlet of the heat storage cooler 2 is connected to a coke loading flue gas pipeline 4 and a coke exhausting flue gas pipeline 5 .

[0021] The quick shut-off valve 3 in this embodiment is wear-resistant and high-temperature resistant, and is interlocked with the operation of the dust removal fan. When the dust removal fan fails, the command is triggered and the valve is closed. The flue gas generated by the coke oven first enters the heat storage cooler 2 through the dust removal pipeline, and enters the pulse bag dust collector 1 for dust removal after cooling in the cooler. The dust ash enters the ash conveying equipment through the ash hopper, and the purified flue gas is discharged into the atmosphere through the dust removal fan and the chimney. When the equipment is operating normally, the high-temperature flue gas will collide with the heat storage cooler 2 and exchange heat. The coke powder with sparks falls into the ash hopper under the action of inertia to avoid entering the dust collector. However, if the dust removal fan fails, the fan speed decreases, and the gas flow rate in the dust removal pipeline is reduced, which increases the probability of coke powder with sparks entering the dust collector and increases the risk of explosion in the dust collector. At the same time, the valve can also be interlocked with the equipment of the dry quenching process, and the possibility of failure of the dust removal system is reduced by adding multiple interlocking relationships to a valve.

[0022] The quick cut-off valve 3 is interlocked with the hydrogen content monitor in the dry quenching furnace. The hydrogen content can be used as a basis for judging whether the boiler tube has burst. If the hydrogen content increases sharply and seriously exceeds the standard value, the possibility of explosion in the dust removal system can be reduced by closing the valve to prevent the flue gas from entering the dust collector and timely maintenance.

[0023] The quick shut-off valve 3 added in the present invention can be interlocked with the start and stop of the dust removal fan in the dust removal system, and can also be interlocked with the dry coke quenching process equipment, such as the start and stop of the circulating fan of the entire dry coke quenching system. The circulating fan is the core equipment of the dry coke quenching process. If the circulating fan stops, it is equivalent to a failure of the entire dry quenching furnace. At this time, this valve is used to prevent the flue gas from entering the dust collector.

[0024] The utility model uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A dust removal system for a dry coke quenching environment, characterized in that: The invention comprises a pulse bag dust collector and a heat storage cooler. A quick shut-off valve is arranged on the pipeline between the air inlet of the pulse bag dust collector and the air outlet of the heat storage cooler. The quick shut-off valve is electrically connected to the dust removal fan of the pulse bag dust collector or the hydrogen content monitor arranged in the dry quenching furnace or the circulating fan of the dry quenching system by signal. When the dust removal fan and the circulating fan stop running, the controller controls the quick shut-off valve to close and cut off the pipeline. When the hydrogen content monitor measures that the hydrogen content in the dry quenching furnace exceeds the standard, the controller controls the quick shut-off valve to close and cut off the pipeline.

2. The dust removal system for dry coke quenching environment according to claim 1, characterized in that: The air inlet of the heat storage cooler is connected with a coke loading flue gas pipeline and a coke exhausting flue gas pipeline.

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