CN107128990A - The method and apparatus that a kind of MVR evaporators plate steam channel downflow type string is washed - Google Patents
The method and apparatus that a kind of MVR evaporators plate steam channel downflow type string is washed Download PDFInfo
- Publication number
- CN107128990A CN107128990A CN201710525807.0A CN201710525807A CN107128990A CN 107128990 A CN107128990 A CN 107128990A CN 201710525807 A CN201710525807 A CN 201710525807A CN 107128990 A CN107128990 A CN 107128990A
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- valve
- pipeline
- pass line
- mvr
- weight
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Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 48
- 238000011109 contamination Methods 0.000 claims abstract description 43
- 238000004140 cleaning Methods 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000010926 purge Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 17
- 239000012459 cleaning agent Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000000356 contaminant Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Abstract
The invention discloses the method and apparatus that a kind of MVR evaporators plate steam channel downflow type string is washed, the device increases a by-pass line between MVR evaporators and pump discharge of removing contamination, while connecting the lautertuns and sewage disposal pump preceding pipeline of the dirty pot bottom of weight with pipeline；Cleaning fluid adds tank of removing contamination, and is pumped into MVR evaporator plate steam channels through by-pass line by sewage disposal pump, and plate is cleaned from the bottom to top, and eluate flows into the dirty tank of weight, is pumped into MVR evaporators by removing contamination again after filtering, moves in circles, realize that downflow type string is washed.The present invention, which only increases some pipelines, to carry out thoroughly cleaning to MVR evaporator plates steam side, and small investment is simple, convenient.
Description
Technical field
The present invention relates to reducing rules waste water evaporation process field, and in particular to a kind of MVR evaporators plate steam channel is suitable
The method and apparatus that streaming string is washed.
Background technology
Reducing rules waste water is compared with utilizing black pulp liquor, and the composition of its solid content is similar, but solid concentration is low.For ring
Protect, realize utilization of wastewater resource, have started to handle reducing rules both at home and abroad at present using utilizing black pulp liquor alkali recovery technology and give up
Water, but restrict evaporation efficiency and operating cost that the key of this treatment technology economy is exactly low density wastewater.It was verified that machine
Tool vapor recompression（MVR）Evaporator is a kind of evaporation equipment of the low dense reducing rules waste water of economical and efficient, it is only necessary to when starting shooting
Steam is passed through, the indirect steam just produced afterwards using its own is used, the thermal efficiency is very high through compressor compression Posterior circle.
But because reducing rules waste water is removed containing the inorganic beyond the region of objective existence such as carbohydrate, lignin, extract and alkali, also containing fine suspension,
Calcium and magnesium, silicon etc. are inevitably brought into a small amount of into dirty component easily into dirty component, therefore in the indirect steam produced, and its is continuous
Accumulation may result in evaporator plate internal incrustation, cause evaporation efficiency drastically to decline, operating cost rise, and life is caused when serious
Production can not be carried out.
At present, the processing of evaporator plate fouling is concentrated on in waste water into the control of dirty component, and to evaporator
Steam side panels internal incrustation is then without correlation process method.
The content of the invention
In order to overcome the deficiencies in the prior art, the present invention provides one kind and MVR evaporator plates steam side can be carried out thoroughly
The downflow type washing methods and device of cleaning, carry out some pipelines of increase, simple, convenient.
A kind of method that MVR evaporators plate steam channel downflow type string is washed, is mainly included in MVR evaporators and removes contamination and be pumped into
Mouth one valve of increase, is connected with the lautertuns below the dirty tank of weight, while in pump discharge and the increasing of MVR evaporators purge outlet of removing contamination
Plus a by-pass line, cleaning fluid first full of plate is internal, the dirty tank of weight and lautertuns, be then turned on sewage disposal pump and carry out cleaning fluid following
Ring, by the supreme cleaning plate in bottom, eluate flows into the dirty tank of weight, is pumped into MVR evaporators by removing contamination again after filtering, circulates past
It is multiple, realize that downflow type string is washed.
The present invention is achieved through the following technical solutions.
A kind of device that MVR evaporators plate steam channel downflow type string is washed, the device includes the dirty tank of MVR evaporators 1, weight
2nd, remove contamination the dirty pump 5 of tank 4, weight, sewage disposal pump 6, the first valve 7, the 3rd valve 9, the 4th valve 10, the 5th valve 11, the 6th valve
12 and pressure sensor 14, in addition to by-pass line A and by-pass line B, it is provided with the purge outlet end of MVR evaporators 1
By-pass line A, the by-pass line A one end are connected on the pipeline between the valve 7 of sewage disposal pump 6 and first by pipeline, separately
One end is connected on the pipeline between the purge outlet of MVR evaporators 1 and the 3rd valve 9 by pipeline, is set on the by-pass line A
There is the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the arrival end of the by-pass line B is connected to by pipeline
On the bottom of weight dirt tank 2, the pipeline that the port of export is connected to sewage disposal pump 6 between tank 4 of removing contamination by pipeline, the by-pass line B
Lautertuns 3, the 7th valve 13 are disposed with from arrival end to the port of export.
It is preferred that, screen pack is carried on the lautertuns.
It is further preferred that the screen pack is one kind in stainless (steel) wire and acid and alkali-resistance filter cloth.
It is preferred that, the gas outlet of the MVR evaporators 1 is connected with non-condensable gas pipeline, and along fixed gas Way out, is not coagulated
Pressure sensor 14, the 4th valve 10 are disposed with feed channel；The purge outlet of MVR evaporators 1 and the pipeline company that removes contamination
Connect, the pipeline of removing contamination is disposed with the 3rd valve 9, tank 4 of removing contamination, sewage disposal pump 6, the first valve 7 along clean and dirt water Way out；
The side of MVR evaporators 1 top is connected with the dirty pipeline of weight, and the heavy dirty pipeline is disposed with the 5th along weight outlet of sewer direction
The dirty tank 2 of valve 11, weight, the dirty pump 5 of weight, the 6th valve 12.
A kind of utilization devices discussed above realizes the method that MVR evaporator plate steam channel downflow type strings are washed, including
Following steps：
（1）Increase a by-pass line A at the purge outlet end of MVR evaporators 1, one end of the by-pass line A is connected by pipeline
It is connected on the pipeline between the valve 7 of sewage disposal pump 6 and first, the other end is connected to MVR evaporators purge outlet and by pipeline
On pipeline between three valves 9, the by-pass line A is provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line
B, the by-pass line B arrival end are connected to the bottom of the dirty tank 2 of weight by pipeline, and the port of export is connected to sewage disposal pump by pipeline
Removing contamination on pipeline between 6 and tank 4 of removing contamination, the by-pass line B is disposed with lautertuns 3, from arrival end to the port of export
Seven valves 13；
（2）The dirty pump 5 of sewage disposal pump 6 and weight is closed, the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and the is closed
Seven valves 13, open the 3rd valve 9 and the 5th valve 11；Cleaning fluid is pumped into tank 4 of removing contamination, makes cleaning fluid from MVR evaporator bottoms
Portion enters, and overflows to the dirty tank 2 of weight and arrives lautertuns 3 again, stops addition cleaning fluid when cleaning fluid is full of lautertuns 3；
（3）The 3rd valve 9 is closed, starts sewage disposal pump 6, it is slow to open the 7th valve 13 and the second valve 8, make MVR evaporator plates
Piece cleaning liquid inside flows from bottom to up, carries out downflow type string and washes.
It is preferred that, step（2）Described cleaning fluid is one kind or many in alkaline solution, acid solution and contaminant removing cleaning agent
Kind.
It is preferred that, step（3）During described downflow type string is washed, the temperature of cleaning fluid remains 70-90 DEG C.
It is preferred that, step（3）During described downflow type string is washed, MVR evaporators top pressure is controlled in below 0.8bar.
Compared with prior art, the invention has the advantages that and beneficial effect：
（1）The present invention utilizes existing MVR evaporator pipelines, only increases a bypass line, and by lautertuns and sewage disposal pump front tube
Road is connected, when evaporation efficiency is decreased obviously, and can be shut down progress shutdown string and be washed, the dirty layer inside plate, holding plate are removed in time
Piece is cleaned, and recovers MVR evaporation efficiencies.
（2）The lautertuns of the present invention is provided with inside filter, plate after going here and there and washing, floating containing what is flushed out in eluate
The impurity such as slag dirt, after filtration treatment, can prevent the dirt washed out from entering back into inside evaporator plate, improve cleaning efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of MVR evaporators plate steam channel downflow type string cleaning device of the present invention.
Embodiment
To further understand the present invention, the specific implementation to invention with reference to the accompanying drawings and examples elaborates, but
It is the scope that the scope of protection of present invention is not limited to embodiment statement.
The structural representation such as Fig. 1 for the MVR evaporator plate steam channel downflow type string cleaning devices that following examples are used
It is shown.The device include MVR evaporators 1, weight dirty tank 2, lautertuns 3, tank 4 of removing contamination, the dirty pump 5 of weight, sewage disposal pump 6, the first valve 7,
Second valve 8, the 3rd valve 9, the 4th valve 10, the 5th valve 11, the 6th valve 12, the 7th valve 13 and pressure sensor
14；The gas outlet of the MVR evaporators 1 is connected with non-condensable gas pipeline, and along fixed gas Way out, on non-condensable gas pipeline successively
It is provided with pressure sensor 14, the 4th valve 10；The purge outlet of MVR evaporators 1 is connected with pipeline of removing contamination, the decontamination orifice
Road is disposed with the 3rd valve 9, tank 4 of removing contamination, sewage disposal pump 6, the first valve 7 along clean and dirt water Way out；In MVR evaporators 1
One end that purge outlet end is provided with by-pass line A, the by-pass line A is connected to the valve 7 of sewage disposal pump 6 and first by pipeline
Between pipeline on, the other end is connected on the pipeline between the purge outlet of MVR evaporators 1 and the 3rd valve 9 by pipeline, institute
By-pass line A is stated provided with the second valve 8；The side of MVR evaporators 1 top is connected with the dirty pipeline of weight, the heavy dirty pipeline edge
Weight outlet of sewer direction is disposed with the dirty tank 2 of the 5th valve 11, weight, the dirty pump 5 of weight, the 6th valve 12；Set in the dirty bottom of tank 2 of weight
The arrival end for being equipped with by-pass line B, the by-pass line B is connected to the bottom of the dirty tank 2 of weight by pipeline, and the port of export passes through pipeline
The removing contamination on pipeline between tank 4 of removing contamination that be connected to sewage disposal pump 6, the by-pass line B is set gradually from arrival end to the port of export
There are lautertuns 3, the 7th valve 13.
Embodiment 1
Increase a by-pass line A between MVR evaporators 1 and sewage disposal pump 6 are exported, its one end is connected to sewage disposal pump by pipeline
6 and the first pipeline between valve 7 on, the other end is connected between MVR evaporators purge outlet and the 3rd valve 9 by pipeline
Pipeline on, bypass duct A be provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the shunt valve simultaneously
Line B arrival end is connected to the bottom of the dirty tank 2 of weight by pipeline, the port of export sewage disposal pump 6 is connected to by pipeline and remove contamination tank 4 it
Between remove contamination on pipeline, the by-pass line B is disposed with lautertuns 3, the 7th valve 13 from arrival end to the port of export.Close
Sewage disposal pump 6 and the dirty pump 5 of weight, close the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and the 7th valve 13, beat
Open the 3rd valve 9 and the 5th valve 11；Alkali collection white liquor is pumped into tank 4 of removing contamination, it is entered from MVR base of evaporators, overflow
Into weight dirt tank 2, and the lautertuns 3 equipped with stainless steel filter screen is flowed into, stop adding when alkali collection white liquor is full of lautertuns 3
Liquid.The 3rd valve 9 is closed, starts sewage disposal pump 6, it is slow to open the 7th valve 13 and the second valve 8, make plate cleaning liquid inside under
Supreme flowing, carries out downflow type string and washes；String washes temperature and remains 90 DEG C, and top pressure is controlled in 0-0.2bar.Using this method
After processing, evaporator liquid inlet volume returns to previous level, cycle of operation increase by more than 50%.
Embodiment 2
Increase a by-pass line A between MVR evaporators 1 and sewage disposal pump 6 are exported, its one end is connected to sewage disposal pump by pipeline
6 and the first pipeline between valve 7 on, the other end is connected between MVR evaporators purge outlet and the 3rd valve 9 by pipeline
Pipeline on, bypass duct A be provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the shunt valve simultaneously
Line B arrival end is connected to the bottom of the dirty tank 2 of weight by pipeline, the port of export sewage disposal pump 6 is connected to by pipeline and remove contamination tank 4 it
Between remove contamination on pipeline, the by-pass line B is disposed with lautertuns 3, the 7th valve 13 from arrival end to the port of export.Close
The dirty pump 5 of sewage disposal pump 6 and weight, close the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and with the 7th valve 13,
Open the 3rd valve 9 and the 5th valve 11；Watery hydrochloric acid is pumped into tank 4 of removing contamination, it is entered from MVR base of evaporators, overflow is entered
Enter the dirty tank 2 of weight, and flow into the lautertuns 3 equipped with acid and alkali-resistance filter cloth, liquid feeding is stopped when watery hydrochloric acid is full of lautertuns 3.Close the
Three valves 9, start sewage disposal pump 6, slow to open the 7th valve 13 and the second valve 8, plate cleaning liquid inside is flowed from bottom to up,
Downflow type string is carried out to wash；String washes temperature and remains 70 DEG C, and top pressure is controlled in 0.4-0.6bar.After being handled using this method,
Evaporator liquid inlet volume returns to previous level, cycle of operation increase by more than 50%.
Embodiment 3
Increase a by-pass line A between MVR evaporators 1 and sewage disposal pump 6 are exported, its one end is connected to sewage disposal pump by pipeline
6 and the first pipeline between valve 7 on, the other end is connected between MVR evaporators purge outlet and the 3rd valve 9 by pipeline
Pipeline on, bypass duct A be provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the shunt valve simultaneously
Line B arrival end is connected to the bottom of the dirty tank 2 of weight by pipeline, the port of export sewage disposal pump 6 is connected to by pipeline and remove contamination tank 4 it
Between remove contamination on pipeline, the by-pass line B is disposed with lautertuns 3, the 7th valve 13 from arrival end to the port of export.Close
The dirty pump 5 of sewage disposal pump 6 and weight, close the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and with the 7th valve 13,
Open the 3rd valve 9 and the 5th valve 11；Contaminant removing cleaning agent is pumped into tank 4 of removing contamination, it is entered from MVR base of evaporators, overflow
Stream enters weight dirt tank 2, and flows into the lautertuns 3 equipped with stainless steel filter screen, stops adding when contaminant removing cleaning agent is full of lautertuns 3
Liquid.The 3rd valve 9 is closed, starts sewage disposal pump 6, it is slow to open the 7th valve 13 and the second valve 8, make plate cleaning liquid inside under
Supreme flowing, carries out downflow type string and washes；String washes temperature and remains 80 DEG C, and top pressure is controlled in 0.6-0.8bar.Using we
After method processing, evaporator liquid inlet volume returns to previous level, cycle of operation increase by more than 50%.
Embodiment 4
Increase a by-pass line A between MVR evaporators 1 and sewage disposal pump 6 are exported, its one end is connected to sewage disposal pump by pipeline
6 and the first pipeline between valve 7 on, the other end is connected between MVR evaporators purge outlet and the 3rd valve 9 by pipeline
Pipeline on, bypass duct A be provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the shunt valve simultaneously
Line B arrival end is connected to the bottom of the dirty tank 2 of weight by pipeline, the port of export sewage disposal pump 6 is connected to by pipeline and remove contamination tank 4 it
Between remove contamination on pipeline, the by-pass line B is disposed with lautertuns 3, the 7th valve 13 from arrival end to the port of export.Close
The dirty pump 5 of sewage disposal pump 6 and weight, close the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and with the 7th valve 13,
Open the 3rd valve 9 and the 5th valve 11；Caustic lye of soda and descaling cleaning agent are pumped into tank 4 of removing contamination to be mixed, mixed liquor is from MVR
Base of evaporator enters, and overflow enters the dirty tank 2 of weight, and flows into the lautertuns 3 equipped with stainless steel filter screen, when mixed liquor was full of
Stop liquid feeding during filter pocket 3.The 3rd valve 9 is closed, starts sewage disposal pump 6, it is slow to open the 7th valve 13 and the second valve 8, make plate
Piece cleaning liquid inside flows from bottom to up, carries out downflow type string and washes；String washes temperature and remains 85 DEG C, and top pressure is controlled in 0.4-
0.6bar.After being handled using this method, evaporator liquid inlet volume returns to previous level, cycle of operation increase by more than 50%.
Embodiment 5
Increase a by-pass line A between MVR evaporators 1 and sewage disposal pump 6 are exported, its one end is connected to sewage disposal pump by pipeline
6 and the first pipeline between valve 7 on, the other end is connected between MVR evaporators purge outlet and the 3rd valve 9 by pipeline
Pipeline on, bypass duct A be provided with the second valve 8；The dirty bottom of tank 2 of weight is provided with by-pass line B, the shunt valve simultaneously
Line B arrival end is connected to the bottom of the dirty tank 2 of weight by pipeline, the port of export sewage disposal pump 6 is connected to by pipeline and remove contamination tank 4 it
Between remove contamination on pipeline, the by-pass line B is disposed with lautertuns 3, the 7th valve 13 from arrival end to the port of export.Close
The dirty pump 5 of sewage disposal pump 6 and weight, close the first valve 7, the second valve 8, the 4th valve 10, the 6th valve 12 and with the 7th valve 13,
Open the 3rd valve 9 and the 5th valve 11；Burning hydrochloric acid and descaling cleaning agent are pumped into tank 4 of removing contamination to be mixed, mixed liquor is from MVR
Base of evaporator enters, and overflow enters the dirty tank 2 of weight, and flows into the lautertuns 3 equipped with stainless steel filter screen, when mixed liquor was full of
Stop liquid feeding during filter pocket 3.The 3rd valve 9 is closed, starts sewage disposal pump 6, it is slow to open the 7th valve 13 and the second valve 8, make plate
Piece cleaning liquid inside flows from bottom to up, carries out downflow type string and washes；String washes temperature and remains 75 DEG C, and top pressure is controlled in 0.2-
0.4bar.After being handled using this method, evaporator liquid inlet volume returns to previous level, cycle of operation increase by more than 50%.
Claims (8)
1. a kind of MVR evaporators plate steam channel downflow type string cleaning device, the device includes MVR evaporators（1）, the dirty tank of weight
（2）, tank of removing contamination（4）, the dirty pump of weight（5）, sewage disposal pump（6）, the first valve（7）, the 3rd valve（9）, the 4th valve（10）, the 5th valve
Door（11）, the 6th valve（12）And pressure sensor（14）, it is characterised in that also including by-pass line A and by-pass line B,
The MVR evaporators（1）Purge outlet end is provided with by-pass line A, and one end of the by-pass line A is connected to clearly by pipeline
Dirty pump（6）With the first valve（7）Between pipeline on, the other end is connected to MVR evaporators by pipeline（1）Purge outlet and
Three valves（9）Between pipeline on, the by-pass line A be provided with the second valve（8）；In the heavy dirty tank（2）Bottom is set
The arrival end for having by-pass line B, the by-pass line B is connected to the dirty tank of weight by pipeline（2）Bottom, the port of export passes through pipeline
It is connected to sewage disposal pump（6）With tank of removing contamination（4）Between pipeline on, the by-pass line B is set gradually from arrival end to the port of export
There is lautertuns（3）, the 7th valve（13）.
2. a kind of MVR evaporators plate steam channel downflow type string cleaning device according to claim 1, it is characterised in that
Screen pack is carried on the lautertuns.
3. a kind of MVR evaporators plate steam channel downflow type string cleaning device according to claim 2, it is characterised in that
The screen pack is one kind in stainless (steel) wire and acid and alkali-resistance filter cloth.
4. a kind of MVR evaporators plate steam channel downflow type string cleaning device according to claim 1, it is characterised in that
The MVR evaporators（1）Gas outlet be connected with non-condensable gas pipeline, and along fixed gas Way out, on non-condensable gas pipeline successively
It is provided with pressure sensor（14）, the 4th valve（10）；The MVR evaporators（1）Purge outlet is connected with pipeline of removing contamination, described
Pipeline of removing contamination is disposed with the 3rd valve along clean and dirt water Way out（9）, tank of removing contamination（4）, sewage disposal pump（6）, the first valve
（7）；The MVR evaporators（1）Side top is connected with the dirty pipeline of weight, and the heavy dirty pipeline is set gradually along weight outlet of sewer direction
There is the 5th valve（11）, the dirty tank of weight（2）, the dirty pump of weight（5）, the 6th valve（12）.
5. the device described in a kind of utilization claim any one of 1-4 realizes that MVR evaporator plate steam channel downflow type strings are washed
Method, it is characterised in that comprise the following steps：
（1）In MVR evaporators（1）Purge outlet end increases a by-pass line A, and one end of the by-pass line A passes through pipeline
It is connected to sewage disposal pump（6）With the first valve（7）Between pipeline on, the other end is connected to MVR evaporators by pipeline and removed contamination out
Mouth and the 3rd valve（9）Between pipeline on, the by-pass line A be provided with the second valve（8）；In the dirty tank of weight（2）Bottom is set
The arrival end for being equipped with by-pass line B, the by-pass line B is connected to the dirty tank of weight by pipeline（2）Bottom, the port of export passes through pipe
Road is connected to sewage disposal pump（6）With tank of removing contamination（4）Between remove contamination on pipeline, the by-pass line B from arrival end to the port of export according to
It is secondary to be provided with lautertuns（3）, the 7th valve（13）；
（2）Close sewage disposal pump（6）With the dirty pump of weight（5）, close the first valve（7）, the second valve（8）, the 4th valve（10）, the 6th
Valve（12）With the 7th valve（13）, open the 3rd valve（9）With the 5th valve（11）；Cleaning fluid is pumped into tank of removing contamination（4）, make
Cleaning fluid enters from MVR base of evaporators, overflows to the dirty tank of weight（2）Lautertuns is arrived again（3）, when cleaning fluid is full of lautertuns（3）
When stop addition cleaning fluid；
（3）Close the 3rd valve（9）, start sewage disposal pump（6）, it is slow to open the 7th valve（13）With the second valve（8）, make MVR
Evaporator plate cleaning liquid inside flows from bottom to up, carries out downflow type string and washes.
6. the method that a kind of MVR evaporators plate steam channel downflow type string according to claim 5 is washed, its feature exists
In step（2）Described cleaning fluid is the one or more in alkaline solution, acid solution and contaminant removing cleaning agent.
7. the method that a kind of MVR evaporators plate steam channel downflow type string according to claim 5 is washed, its feature exists
In step（3）During described downflow type string is washed, the temperature of cleaning fluid remains 70-90 DEG C.
8. the method that a kind of MVR evaporators plate steam channel downflow type string according to claim 5 is washed, its feature exists
In step（3）During described downflow type string is washed, MVR evaporators top pressure is controlled in below 0.8bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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