CN105256633A - Online backflush treatment method for blocking of digester sieve plate - Google Patents
Online backflush treatment method for blocking of digester sieve plate Download PDFInfo
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- CN105256633A CN105256633A CN201510723892.2A CN201510723892A CN105256633A CN 105256633 A CN105256633 A CN 105256633A CN 201510723892 A CN201510723892 A CN 201510723892A CN 105256633 A CN105256633 A CN 105256633A
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- sieve plate
- backflush
- recoil
- white liquid
- suction valve
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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
The present invention relates to sieving technical field, particularly relate to a kind of solution still sieve plate that steams and block online backflush process method.
Background technology
At present, slurrying continuously cooking wood chip steams separates still due to the difference of output elevator wood chip quality, and the steaming solution still sieve plate of boiling wood chip has blocking in various degree, and blocking serious directly affects output.Usual processing method is that still is separated in emptying steaming, and cutting large blind plate giant cleaning dirt needs time of four to five days, long in time limitly can affect output.
Summary of the invention
In view of this, the invention provides a kind of solution still sieve plate that steams and block online backflush process method, solve the problem that sieve plate blocks and completes whole sieve plate on-line cleaning process when affecting output and being little.
The technological means that the present invention adopts is as follows:
A kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps:
A1, preliminary treatment: valve-off, be switched to recoil tube;
A2, backflush process: open a suction valve, start the sieve plate that recoils;
A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.
Preferably, also comprise in described steps A 1:
A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product;
The suction valve of the sieve plate of A11, the recoil of closedown needs;
A12, white liquid or black liquor are heated to 145 DEG C-180 DEG C through heat exchanger, flow to central tube;
A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 145 DEG C-180 DEG C;
A14, white liquid or black liquor flowed to switch to recoil tube.
Preferably, in described steps A 2, the described suction valve open recoil time is 6min-10min.
Preferably, in described steps A 13, the temperature of described backflush process is 160 DEG C.
Adopt one steaming solution still sieve plate provided by the present invention to block online backflush process method and can block the initial stage at sieve plate, be heated to the temperature of needs through heat exchanger by self black liquor or white liquid, close suction valve to go to remove to rinse the dirt being attached to sieve plate in the other direction, significantly reduce the risk of sieve plate blocking, online backflushing sieve plate solves sieve plate blocking and completes whole process when yield effect is little.The present invention utilizes the principle of sieve plate back flushing, and the dirt adhered to by sieve plate is clean by the pressure washing of pump, increasing the service time of sieve plate, reducing production loss when not stopping, energy-efficient.
Accompanying drawing explanation
Fig. 1 is method flow schematic diagram of the present invention.
Detailed description of the invention
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
With reference to Fig. 1, a kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps:
A1, preliminary treatment: valve-off, be switched to recoil tube.Close the valve needing the suction valve of the two-layer sieve plate of recoil and white liquid or black liquor to flow to central tube, white liquid or black liquor are flowed to and is switched to recoil tube;
A2, backflush process: open a suction valve, start the sieve plate that recoils.Open the suction valve of the two-layer sieve plate of recoil required for, at the temperature of backflush process, start recoil cleaning sieve plate.Often prop up and rushed again that one deck repercussion effect is better;
A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.Close the valve of white liquid or black liquor, steam, make white liquid or black liquor, steam stops flowing into steaming and separate still, open suction valve, start to recover to run work normally.
Preferably, also comprise in described steps A 1:
A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product.Being calculated by the liquor ratio of Impbin tower according to the suction total amount of the suction valve of the sieve plate of required recoil need the value of the amount of falling, need the value of the amount of falling by falling that output is down to;
A11, close the suction valve of sieve plate needing recoil, the sieve plate of required recoil is quit work operations, the sieve plate of required recoil is entered and waits for the wash phase that recoils;
A12, white liquid or black liquor are heated to 145 DEG C-180 DEG C through heat exchanger H1502, flow to central tube;
A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 145 DEG C-180 DEG C;
A14, white liquid or black liquor flowed to switch to recoil tube.
Preferably, in described steps A 2, the described suction valve open recoil time is 6min-10min.
Preferably, in described steps A 13, the temperature of described backflush process is 160 DEG C.
At the initial stage of sieve plate blocking, because tamper is also just attached on sieve plate, we are heated to the temperature of needs by heat exchanger by self black liquor or white liquid, close two-layer going and remove to rinse the dirt being attached to sieve plate in the other direction, can reduce the risk of sieve plate blocking like this, online backflushing sieve plate can solve sieve plate blocking and complete whole process when affecting output and being little.
Specific embodiment 1
A kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps: A1, preliminary treatment: valve-off, is switched to recoil tube.Close the valve needing the suction valve of the two-layer sieve plate of recoil and white liquid or black liquor to flow to central tube, white liquid or black liquor are flowed to and is switched to recoil tube; A2, backflush process: open a suction valve, start the sieve plate that recoils.Open the suction valve of the two-layer sieve plate of recoil required for, at the temperature of backflush process, start recoil cleaning sieve plate.Often prop up and rushed again that one deck repercussion effect is better; A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.Close the valve of white liquid or black liquor, steam, make white liquid or black liquor, steam stops flowing into steaming and separate still, open suction valve, start to recover to run work normally.Also comprise in described steps A 1: A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product.Being calculated by the liquor ratio of Impbin tower according to the suction total amount of the suction valve of the sieve plate of required recoil need the value of the amount of falling, need the value of the amount of falling by falling that output is down to; A11, close the suction valve of sieve plate needing recoil, the sieve plate of required recoil is quit work operations, the sieve plate of required recoil is entered and waits for the wash phase that recoils; A12, white liquid or black liquor are heated to 145 DEG C through heat exchanger H1502, flow to central tube; A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 145 DEG C; A14, white liquid or black liquor flowed to switch to recoil tube.In described steps A 2, the described suction valve open recoil time is 6min.
Specific embodiment 2
A kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps: A1, preliminary treatment: valve-off, is switched to recoil tube.Close the valve needing the suction valve of the two-layer sieve plate of recoil and white liquid or black liquor to flow to central tube, white liquid or black liquor are flowed to and is switched to recoil tube; A2, backflush process: open a suction valve, start the sieve plate that recoils.Open the suction valve of the two-layer sieve plate of recoil required for, at the temperature of backflush process, start recoil cleaning sieve plate.Often prop up and rushed again that one deck repercussion effect is better; A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.Close the valve of white liquid or black liquor, steam, make white liquid or black liquor, steam stops flowing into steaming and separate still, open suction valve, start to recover to run work normally.Also comprise in described steps A 1: A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product.。Being calculated by the liquor ratio of Impbin tower according to the suction total amount of the suction valve of the sieve plate of required recoil need the value of the amount of falling, need the value of the amount of falling by falling that output is down to; A11, close the suction valve of sieve plate needing recoil, the sieve plate of required recoil is quit work operations, the sieve plate of required recoil is entered and waits for the wash phase that recoils; A12, white liquid or black liquor are heated to 160 DEG C through heat exchanger H1502, flow to central tube; A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 160 DEG C; A14, white liquid or black liquor flowed to switch to recoil tube.In described steps A 2, the described suction valve open recoil time is 7min.
Specific embodiment 3
A kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps: A1, preliminary treatment: valve-off, is switched to recoil tube.Close the valve needing the suction valve of the two-layer sieve plate of recoil and white liquid or black liquor to flow to central tube, white liquid or black liquor are flowed to and is switched to recoil tube; A2, backflush process: open a suction valve, start the sieve plate that recoils.Open the suction valve of the two-layer sieve plate of recoil required for, at the temperature of backflush process, start recoil cleaning sieve plate.Often prop up and rushed again that one deck repercussion effect is better; A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.Close the valve of white liquid or black liquor, steam, make white liquid or black liquor, steam stops flowing into steaming and separate still, open suction valve, start to recover to run work normally.Also comprise in described steps A 1: A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product.Being calculated by the liquor ratio of Impbin tower according to the suction total amount of the suction valve of the sieve plate of required recoil need the value of the amount of falling, need the value of the amount of falling by falling that output is down to; A11, close the suction valve of sieve plate needing recoil, the sieve plate of required recoil is quit work operations, the sieve plate of required recoil is entered and waits for the wash phase that recoils; A12, white liquid or black liquor are heated to 170 DEG C through heat exchanger H1502, flow to central tube; A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 170 DEG C; A14, white liquid or black liquor flowed to switch to recoil tube.In described steps A 2, the described suction valve open recoil time is 8min.
Specific embodiment 4
A kind of solution still sieve plate that steams blocks online backflush process method, comprises the steps: A1, preliminary treatment: valve-off, is switched to recoil tube.Close the valve needing the suction valve of the two-layer sieve plate of recoil and white liquid or black liquor to flow to central tube, white liquid or black liquor are flowed to and is switched to recoil tube; A2, backflush process: open a suction valve, start the sieve plate that recoils.Open the suction valve of the two-layer sieve plate of recoil required for, at the temperature of backflush process, start recoil cleaning sieve plate.Often prop up and rushed again that one deck repercussion effect is better; A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.Close the valve of white liquid or black liquor, steam, make white liquid or black liquor, steam stops flowing into steaming and separate still, open suction valve, start to recover to run work normally.Also comprise in described steps A 1: A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product.Being calculated by the liquor ratio of Impbin tower according to the suction total amount of the suction valve of the sieve plate of required recoil need the value of the amount of falling, need the value of the amount of falling by falling that output is down to; A11, close the suction valve of sieve plate needing recoil, the sieve plate of required recoil is quit work operations, the sieve plate of required recoil is entered and waits for the wash phase that recoils; A12, white liquid or black liquor are heated to 180 DEG C through heat exchanger H1502, flow to central tube; A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 180 DEG C; A14, white liquid or black liquor flowed to switch to recoil tube.In described steps A 2, the described suction valve open recoil time is 10min.
In sum, adopt one steaming solution still sieve plate provided by the present invention to block online backflush process method and can block the initial stage at sieve plate, be heated to the temperature of needs through heat exchanger by self black liquor or white liquid, close suction valve to go to remove to rinse the dirt being attached to sieve plate in the other direction, significantly reduce the risk of sieve plate blocking, online backflushing sieve plate solves sieve plate blocking and completes whole process when yield effect is little.The present invention utilizes the principle of sieve plate back flushing, and the dirt adhered to by sieve plate is clean by the pressure washing of pump, increasing the service time of sieve plate, reducing production loss when not stopping, energy-efficient.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (4)
1. steam solution still sieve plate and block an online backflush process method, it is characterized in that, comprise the steps:
A1, preliminary treatment: valve-off, be switched to recoil tube;
A2, backflush process: open a suction valve, start the sieve plate that recoils;
A3, Recovery processing: the operation stopping white liquid, black liquor, steam, open valve, starts to recover normal work.
2. steaming according to claim 1 is separated still sieve plate and is blocked online backflush process method, it is characterized in that, also comprises in described steps A 1:
A10, calculating need the amount of falling, and according to need the amount of falling carry out falling product;
The suction valve of the sieve plate of A11, the recoil of closedown needs;
A12, white liquid or black liquor are heated to 145 DEG C ~ 180 DEG C through heat exchanger, flow to central tube;
A13, wait for that the temperature flowing to central tube reaches the temperature of backflush process, close the valve that white liquid or black liquor flow to central tube, the temperature of described backflush process is 145 DEG C ~ 180 DEG C;
A14, white liquid or black liquor flowed to switch to recoil tube.
3. steaming according to claim 1 is separated still sieve plate and is blocked online backflush process method, it is characterized in that, in described steps A 2, the described suction valve open recoil time is 6min ~ 10min.
4. steaming according to claim 2 is separated still sieve plate and is blocked online backflush process method, and it is characterized in that, in described steps A 13, the temperature of described backflush process is 160 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510723892.2A CN105256633B (en) | 2015-10-30 | 2015-10-30 | One kind steams solution kettle sieve plate and blocks online recoil process method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510723892.2A CN105256633B (en) | 2015-10-30 | 2015-10-30 | One kind steams solution kettle sieve plate and blocks online recoil process method |
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| Publication Number | Publication Date |
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| CN105256633A true CN105256633A (en) | 2016-01-20 |
| CN105256633B CN105256633B (en) | 2017-08-04 |
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| US4674196A (en) * | 1985-11-29 | 1987-06-23 | Kmw Corporation | Condensed steam agitator for a dryer cylinder and method |
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| CN202989667U (en) * | 2012-11-17 | 2013-06-12 | 郑州登电豫嵩新型装饰板业有限公司 | Rinsing system of paper pulp |
| CN203683985U (en) * | 2014-01-07 | 2014-07-02 | 海南金海浆纸业有限公司 | ImpBin tower impurity removing device |
| CN104404804A (en) * | 2014-10-21 | 2015-03-11 | 华南理工大学 | Chemical pulp or dissolving pulp preparation method and experimental displacement steaming and cooking device thereof |
| CN104452389A (en) * | 2014-11-04 | 2015-03-25 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
-
2015
- 2015-10-30 CN CN201510723892.2A patent/CN105256633B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674196A (en) * | 1985-11-29 | 1987-06-23 | Kmw Corporation | Condensed steam agitator for a dryer cylinder and method |
| CN101906730A (en) * | 2010-07-15 | 2010-12-08 | 轻工业杭州机电设计研究院 | Non-wood fiber continuous cooking method and device |
| CN202989667U (en) * | 2012-11-17 | 2013-06-12 | 郑州登电豫嵩新型装饰板业有限公司 | Rinsing system of paper pulp |
| CN203683985U (en) * | 2014-01-07 | 2014-07-02 | 海南金海浆纸业有限公司 | ImpBin tower impurity removing device |
| CN104404804A (en) * | 2014-10-21 | 2015-03-11 | 华南理工大学 | Chemical pulp or dissolving pulp preparation method and experimental displacement steaming and cooking device thereof |
| CN104452389A (en) * | 2014-11-04 | 2015-03-25 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
Non-Patent Citations (1)
| Title |
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| 刘秉钺: "《制浆造纸节能新技术》", 31 December 2010 * |
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