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On-line backflushing treatment method for sieve plate blockage of steaming kettle

A technology of sieve plate and treatment method of a digester, which is applied in the field of on-line recoil treatment of sieve plate clogging in a digester, can solve problems such as sieve plate clogging, and achieve the effects of increasing service time, reducing risks, and reducing yield loss

Active Publication Date: 2017-08-04
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides an on-line recoil treatment method for sieve plate clogging in the digester, which solves the problem that the sieve plate is clogged and the entire online cleaning process of the sieve plate is completed without greatly affecting the output.

Method used

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  • On-line backflushing treatment method for sieve plate blockage of steaming kettle

Examples

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specific Embodiment 1

[0034] An on-line recoil treatment method for clogged sieve plate of a digester, comprising the following steps: A1. Pretreatment: closing the valve and switching to the recoil pipe. Close the suction valve of the two-layer sieve plate that needs recoil and the valve that the white liquor or black liquor flows to the center pipe, and switch the flow direction of the white liquor or black liquor to the recoil pipe; A2, recoil treatment: open a suction valve , start backflushing the sieve plate. Open the suction valve of a two-layer sieve plate that needs to be recoiled, and start to recoil and clean the sieve plate at the temperature of the recoil treatment. After each bottle is flushed, another layer of recoil effect is better; A3, recovery treatment: stop the operation of white liquor, black liquor, and steam, open the valve, and start to resume normal work. Close the valve of white liquor or black liquor and steam to stop the flow of white liquor or black liquor and steam i...

specific Embodiment 2

[0036] An on-line recoil treatment method for clogged sieve plate of a digester, comprising the following steps: A1. Pretreatment: closing the valve and switching to the recoil pipe. Close the suction valve of the two-layer sieve plate that needs recoil and the valve that the white liquor or black liquor flows to the center pipe, and switch the flow direction of the white liquor or black liquor to the recoil pipe; A2, recoil treatment: open a suction valve , start backflushing the sieve plate. Open the suction valve of a two-layer sieve plate that needs to be recoiled, and start to recoil and clean the sieve plate at the temperature of the recoil treatment. After each bottle is flushed, another layer of recoil effect is better; A3, recovery treatment: stop the operation of white liquor, black liquor, and steam, open the valve, and start to resume normal work. Close the valve of white liquor or black liquor and steam to stop the flow of white liquor or black liquor and steam i...

specific Embodiment 3

[0038] An on-line recoil treatment method for sieve plate blockage in a digester, comprising the following steps: A1. Pretreatment: closing the valve and switching to the recoil pipe. Close the suction valve of the two-layer sieve plate that needs recoil and the valve that the white liquor or black liquor flows to the center pipe, and switch the flow direction of the white liquor or black liquor to the recoil pipe; A2, recoil treatment: open a suction valve , start backflushing the sieve plate. Open the suction valve of a two-layer sieve plate that needs to be recoiled, and start to recoil and clean the sieve plate at the temperature of the recoil treatment. After each bottle is flushed, another layer of recoil effect is better; A3, recovery treatment: stop the operation of white liquor, black liquor, and steam, open the valve, and start to resume normal work. Close the valve of white liquor or black liquor and steam to stop the flow of white liquor or black liquor and steam ...

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Abstract

The invention provides an online backflush treatment method for blocking of a digester sieve plate. The online backflush treatment method comprises the following steps: firstly, pretreatment: closing a suction valve, required to be back flushed, of the sieve plate, closing a valve by which white liquid flows to a central pipe, and switching to a backflush pipe; secondly, back flushing treatment: opening one suction valve, required to be back flushed, of the sieve plate, and starting to back flush the sieve plate at the backflush treatment temperature; thirdly, restoring treatment: stopping the operation of the white liquid, black liquid and steam, opening the suction valve and starting to restore normal work. According to the treatment method provided by the invention, at the initial stage of sieve plate blocking, the sieve plate can be heated to required temperature through the black liquid or white liquid through a heat exchanger, and the suction valve is closed to back flush dirt attached to the sieve plate, so that the blocking risk of the sieve plate is greatly reduced; under the conditions that the blocking of the sieve plate is solved by online backflush of the sieve plate and the influence on the yield is little, the whole process is finished.

Description

technical field [0001] The invention relates to the technical field of screening and filtration, in particular to an online recoil treatment method for blockage of a sieve plate of a digester. Background technique [0002] At present, due to the difference in the quality of wood chips in the output hoist, the sieve plate of the digester for pulping continuous cooking chips is clogged to varying degrees, and the serious clogging directly affects the output. The usual treatment method is to empty the steamer, cut the blind plate and clean the dirt with a high-pressure water gun. It takes four to five days, and the long construction period will affect the output. Contents of the invention [0003] In view of this, the present invention provides an on-line recoil treatment method for sieve plate clogging in a digester, which solves the problem that the sieve plate is clogged and completes the entire online cleaning process of the sieve plate without greatly affecting the outpu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C7/00B08B3/02
Inventor 阿涛
Owner HAINAN JINHAI PULP & PAPER