Anti-blocking method for desulfurization cyclone

Abstract

The invention discloses an anti-blocking method for a desulfurization cyclone. The efficiency of the cyclone is influenced by slight blockage; and the equipment cannot operate normally when being seriously blocked and must be stopped for cleaning. The method comprises the following steps that slurry enters through an inlet pipe, impurities are filtered through a filter screen plate, the filtered slurry is discharged through an outlet pipe, and meanwhile the blocked impurities can fall into a conical hopper; cleaning the filtering inner cavity which has been operated for a period of time, dismounting bolts on a top cover plate on the filtering inner cavity, dismounting the top cover plate, then opening blocking valves on an impurity outlet pipe and an impurity collecting pipe, washing a filtering net plate with water, cleaning the filtering net plate, and then removing impurities from the filtering inner cavity; the cleaned impurities enter the impurity collecting pipe through the impurity outlet pipe and then are discharged through the impurity collecting pipe; the anti-blocking device is used for anti-blocking of the desulfurization cyclone.

Description

Technical Field

[0001] The invention relates to a method for preventing blocking of a desulfurization cyclone. Background Art

[0002] Hydrocyclones are widely used in various industries and are important equipment for separating media. In the limestone-gypsum wet flue gas desulfurization process of power plants, hydrocyclones are indispensable and are mainly used in the following three aspects: limestone slurry preparation, gypsum primary dehydration, and wastewater treatment.

[0003] Because limestone contains debris such as wood, rubber, hard stones, and cable sheathing, and the slurry contains debris such as wood, gypsum crystals, and rubber, cyclones often clog. Minor blockages affect cyclone efficiency, while severe blockages prevent the equipment from operating normally and require shutdown for cleaning. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for preventing blocking of a desulfurization cyclone.

[0005] The above purpose is achieved through the following technical solutions: A method for preventing blocking of a desulfurization cyclone, the method comprising the following steps: (1) First, close all the barrier valves, connect the inlet pipe of the box to the main pipe of the cyclone slurry supply, so that the slurry supplied to the cyclone through the slurry main pipe will enter the box for filtration, and then open the barrier valves of the inlet pipe and outlet pipe; (2) The slurry enters through the inlet pipe, and the impurities are filtered through the filter plate. The filtered slurry is discharged through the outlet pipe, and the blocked impurities fall into the cone bucket; (3) After this filter cavity has been running for a period of time, it is necessary to replace it with another filter cavity. The barrier valve of the inlet branch pipe and the barrier valve of the outlet branch pipe are opened, and the barrier valves of the inlet pipe and the outlet pipe are closed. At this time, the slurry enters through the inlet pipe and then enters another filter cavity through the inlet branch pipe. It is filtered by the filter screen in this filter cavity, and then passes through the outlet branch pipe and is finally discharged through the outlet pipe; (4) The blocked debris will fall into the cone bucket. At this time, the filter cavity that has been running for a period of time should be cleaned. The bolts on the top cover plate on the filter cavity should be removed, the top cover plate should be removed, and then the blocking valves on the outlet pipe and the collecting pipe should be opened. The filter screen should be rinsed with water to clean the filter screen. After cleaning, the debris will enter the collecting pipe through the outlet pipe and then be discharged through the collecting pipe.

[0006] The above-mentioned method for preventing blocking of a desulfurization cyclone is as follows: the box body is separated into two filter cavities by a partition, each of the filter cavities is fixed with a filter screen plate at an angle, and one end of one of the filter cavities of the box body is fixed with an inlet pipe and the other end is fixed with an outlet pipe; An inlet branch pipe is fixed at one end of another filter inner cavity of the box, and an outlet branch pipe is fixed at the other end; The inlet branch pipe is connected to the inlet pipe, and the outlet branch pipe is connected to the outlet pipe; The bottom of each filtering inner cavity is provided with a cone bucket, the bottom of the cone bucket is provided with a waste outlet pipe, and the waste outlet pipe is connected to the waste collecting pipe.

[0007] In the method for preventing blocking of a desulfurization cyclone, the collecting pipe is a cylindrical pipe arranged obliquely.

[0008] In the method for preventing blocking of a desulfurization cyclone, a top cover plate is fixed on the top of the box body.

[0009] In the method for preventing blocking of a desulfurization cyclone, the inlet pipe, the inlet branch pipe, the outlet pipe, the outlet branch pipe, the miscellaneous pipe and the miscellaneous pipe are all equipped with isolation valves. Beneficial effects

[0010] 1. The present invention can effectively filter the slurry about to enter the cyclone, and can block the debris through the filter plate to prevent it from clogging the cyclone.

[0011] 2. The present invention is provided with two filter cavities, one for main use and the other for backup. When filtering, the filter screen plate of one filter cavity runs for a period of time, and then the filter screen plate of the other filter cavity is switched to filter by switching the isolation valve, and then the filter cavity that stops filtering is effectively cleaned without affecting the desulfurization operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a top view of the present invention; Figure 2 It is a bottom view of the present invention; Figure 3 is a side view of the present invention; Figure 4 yes Figure 1 AA section view; Figure 5 It is a schematic diagram of the structure without the top cover; In the figure: 1. Isolation valve; 2. Inlet branch pipe; 3. Inlet pipe; 4. Top cover plate; 5. Outlet branch pipe; 6. Outlet pipe; 7. Cone bucket; 8. Filter plate; 9. Collecting pipe; 10. Outlet pipe; 11. Box body; 12. Partition. DETAILED DESCRIPTION

[0013] like Figure 1-5 As shown, a method for preventing desulfurization cyclone blocking includes the following steps: (1) First, close all the barrier valves, connect the inlet pipe of the box to the main pipe of the cyclone slurry supply, so that the slurry supplied to the cyclone through the slurry main pipe will enter the box for filtration, and then open the barrier valves of the inlet pipe and outlet pipe; (2) The slurry enters through the inlet pipe, and the impurities are filtered through the filter plate. The filtered slurry is discharged through the outlet pipe, and the blocked impurities fall into the cone bucket; (3) After this filter cavity has been running for a period of time, it is necessary to replace it with another filter cavity. The barrier valve of the inlet branch pipe and the barrier valve of the outlet branch pipe are opened, and the barrier valves of the inlet pipe and the outlet pipe are closed. At this time, the slurry enters through the inlet pipe and then enters another filter cavity through the inlet branch pipe. It is filtered by the filter screen in this filter cavity, and then passes through the outlet branch pipe and is finally discharged through the outlet pipe; (4) The blocked debris will fall into the cone bucket. At this time, the filter cavity that has been running for a period of time should be cleaned. The bolts on the top cover plate on the filter cavity should be removed, the top cover plate should be removed, and then the blocking valves on the outlet pipe and the collecting pipe should be opened. The filter screen should be rinsed with water to clean the filter screen. After cleaning, the debris will enter the collecting pipe through the outlet pipe and then be discharged through the collecting pipe.

[0014] A method for preventing desulfurization cyclone from blocking, comprising a housing 11, wherein two filter cavities are separated by a partition 12 in the housing, a filter screen 8 is fixed obliquely in each of the filter cavities, an inlet pipe 3 is fixed at one end of one of the filter cavities of the housing, and an outlet pipe 6 is fixed at the other end; The inlet pipe is fixed on the side of the filter screen plate that is tilted toward the side; An inlet branch pipe 2 is fixed at one end of the other filter inner cavity of the box, and an outlet branch pipe 5 is fixed at the other end; The inlet pipe and the inlet branch pipe are fixed on the same side of the box, and the outlet pipe and the outlet branch pipe are fixed on the same side of the box; The inlet branch pipe is connected to the inlet pipe, and the outlet branch pipe is connected to the outlet pipe; The bottom of each of the filter cavities is provided with a cone hopper 7 , and the bottom of the cone hopper is provided with a waste outlet pipe 10 , which is connected to a waste collection pipe 9 .

[0015] In the method for preventing blocking of a desulfurization cyclone, the collecting pipe is a cylindrical pipe arranged obliquely.

[0016] In the above-mentioned method for preventing blocking of a desulfurization cyclone, a top cover plate 4 is fixed on the top of the box body.

[0017] In the method for preventing blocking of a desulfurization cyclone, the inlet pipe, the inlet branch pipe, the outlet pipe, the outlet branch pipe, the miscellaneous pipe and the miscellaneous pipe are all installed with a barrier valve 1, which is a butterfly valve.

Claims

1. A method for preventing desulfurization cyclone from blocking, characterized by: The method comprises the following steps: (1) First, close all the barrier valves, connect the inlet pipe of the box with the main pipe for supplying slurry to the cyclone, so that the slurry supplied to the cyclone through the slurry main pipe will enter the box for filtration, and then open the barrier valves of the inlet pipe and outlet pipe; (2) The slurry enters through the inlet pipe, and the impurities are filtered through the filter screen. The filtered slurry is discharged through the outlet pipe, and the blocked impurities fall into the cone bucket; (3) After the filter cavity has been running for a period of time, it needs to be replaced with another filter cavity. The barrier valve of the inlet branch pipe and the barrier valve of the outlet branch pipe are opened, and the barrier valves of the inlet pipe and the outlet pipe are closed. At this time, the slurry enters through the inlet pipe and then enters another filter cavity through the inlet branch pipe, is filtered through the filter screen in this filter cavity, and then passes through the outlet branch pipe and finally discharged through the outlet pipe; (4) The blocked debris will fall into the cone bucket. At this time, the filter cavity that has been running for a period of time should be cleaned. The bolts on the top cover plate on the filter cavity should be removed, the top cover plate should be removed, and then the blocking valves on the outlet pipe and the collecting pipe should be opened. The filter screen should be rinsed with water to clean the filter screen. The cleaned debris will enter the collecting pipe through the outlet pipe and then be discharged through the collecting pipe.

2. A desulfurization cyclone anti-blocking method according to claim 1, characterized in that: The box body is divided into two filter cavities by a partition, and a filter screen is fixed obliquely in each of the filter cavities. An inlet pipe is fixed at one end of one of the filter cavities of the box body, and an outlet pipe is fixed at the other end. An inlet branch pipe is fixed at one end of another filtering inner cavity of the box, and an outlet branch pipe is fixed at the other end; The inlet branch pipe is connected to the inlet pipe, and the outlet branch pipe is connected to the outlet pipe; The bottom of each filtering inner cavity is provided with a cone bucket, the bottom of the cone bucket is provided with a waste outlet pipe, and the waste outlet pipe is connected to the waste collection pipe.

3. A desulfurization cyclone anti-blocking method according to claim 2, characterized in that: The miscellaneous collecting pipe is a cylindrical pipe arranged obliquely.

4. A desulfurization cyclone anti-blocking method according to claim 3, characterized in that: A top cover plate is fixed on the top of the box body.

5. A method for preventing desulfurization cyclone blockage according to claim 4, characterized in that: The inlet pipe, the inlet branch pipe, the outlet pipe, the outlet branch pipe, the miscellaneous pipe and the miscellaneous pipe are all equipped with blocking valves.

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