CN103480166A - Automatic water discharging method and device used for multi-effect evaporator - Google Patents
Automatic water discharging method and device used for multi-effect evaporator Download PDFInfo
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- CN103480166A CN103480166A CN201310421040.9A CN201310421040A CN103480166A CN 103480166 A CN103480166 A CN 103480166A CN 201310421040 A CN201310421040 A CN 201310421040A CN 103480166 A CN103480166 A CN 103480166A
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Abstract
The invention discloses an automatic water discharging method and an automatic water discharging device used for a multi-effect evaporator. Condensate water generated after heat exchanging is carried out on secondary steam through a heat exchanger enters a steam-water separator, steam is sucked into a vacuum system, water flows into a water discharging pipe, a vacuum gradient is formed in the multi-effect evaporator through adjustment of the vacuum system, and a boiling point gradient is further generated. In the operational process, when the vacuum gradient reaches a specified required value, a water column with corresponding height will be formed in the water discharging pipe to overcome vacuum, automatic water discharging is achieved, condensate water generated through evaporation is automatically discharged into a liquid seal container under the effect of gravity and then automatically discharged out of the multi-effect evaporator through a water discharging opening of the liquid-seal container. The automatic water discharging method and the automatic water discharging device solve the problem that a traditional multi-effect evaporator is complex in water discharging operation, high in labor intensity and maintenance cost and low in use efficiency, and have the advantages of being simple in structure, long in service life, low in maintenance cost and easy to operate. Allocated devices are decreased, the operational reliability is improved, and the true automatic water discharging is achieved.
Description
Technical field
The invention belongs to the multi-effect evaporator field, relate in particular to a kind of self-draining method for multi-effect evaporator and device.
Background technology
Multiple-effect evaporation, as a kind of power-saving technology of maturation, is widely used in the aspects such as the industrial circles such as chlor-alkali, sugaring, pharmacy, chemical industry, papermaking and desalinization.Particularly due to the raising of environmental requirement in recent years, as the effective method of the concentrated desalination of wastewater from chemical industry, the application of multiple-effect evaporation aspect chemical wastewater treatment develops rapidly, at the chemical industrial park multi-effect evaporator, be seen everywhere, but operation is difficult, maintenance is frequent, operational efficiency is low.Multi-effect evaporator is mainly to regulate by vacuum system, produce different vacuum in each single-effect evaporator, thereby form different boiling points in each single-effect evaporator, with giving birth to the thermal source of steam as 1st effective evaporator, the indirect steam again 1st effective evaporator produced is as the thermal source of 2nd effect evaporator, the indirect steam that 2nd effect evaporator produces is as the thermal source of triple effect evaporator, by that analogy, thereby realizes the repeatedly utilization of steam heat of vaporization.
At present, the steam condensate (SC) that each effect evaporation of multi-effect evaporator produces is collected with discharge and is mainly contained three kinds of patterns: 1. adopt collecting tank to collect respectively, after reaching certain water level, by draining after manual switching valve vacuum breaker; 2. adopt collecting tank to collect respectively, after reaching certain water level, utilize water pump forced drainage under vacuum; 3. adopt collecting tank to collect respectively, after reaching certain water level, under robot control system(RCS) is controlled, utilize water pump forced drainage under vacuum.
1. the plant pattern, and troublesome poeration, regulate a plurality of valves, draining after vacuum breaker, and labor strength is large, easily produces error; 2. the plant pattern, and pump performance is had relatively high expectations, and the seal of water pump will often be changed, and need artificial opening water discharge pump, easily produces error; 3. plant pattern, and pump performance is had relatively high expectations, and the seal of water pump will often be changed.
Summary of the invention
The object of the present invention is to provide a kind of self-draining method for multi-effect evaporator and device, be intended to solve the problem that traditional multi-effect evaporator drain operation is complicated, labour intensity is high, maintenance cost is high and the service efficiency of multi-effect evaporator is low.
The present invention is achieved in that a kind of self-draining method for multi-effect evaporator, and the method comprises:
Step 1: the condensed water of indirect steam after the heat exchanger heat exchange enters steam-water separator, and gas is inhaled into vacuum system, and water flows into drainpipe;
Step 2: by the adjusting of vacuum system, make multi-effect evaporator form vacuum gradient, and then produce the boiling point gradient;
Step 3: in running, when the vacuum of this multi-effect evaporator reaches the regulation required value, will form water column in drainpipe and overcome vacuum, and realize Auto-drainage;
Step 4: the condensed water that evaporation produces, under the effect of gravity, automatically enters the fluid-tight container, more automatically discharges multi-effect evaporation system from fluid-tight container discharge outlet.
Another object of the present invention is to provide a kind of self-draining arrangement for multi-effect evaporator, it is characterized in that, this device comprises steam-water separator, drainpipe and fluid-tight container:
The import of steam-water separator is connected with the steam-condensation water out of indirect steam heat exchanger, for realizing separating of gas and water;
Drainpipe is connected with the discharge outlet of steam-water separator, for the passage of water discharge is provided;
The exhaust outlet of steam-water separator is connected with vacuum system, for gas is entered in vacuum system, is regulated;
The fluid-tight container is connected with drainpipe, and drainpipe stretches under the liquid level of fluid-tight container, and after vacuum is opened, the drainpipe lower end mouth of pipe still is immersed in water, and can directly not contact with air, for storing drainpipe, forms the liquid of water column under vacuum.
Further, the fluid-tight container can be pond, groove, tank, can independently arrange, and also can share.
Further, the length of drainpipe is answered long enough, multi-effect evaporator effect vacuum is the M meter water column, the length of the drainpipe of this single-effect evaporator self-draining arrangement should be greater than M+L rice, be that the drainpipe height to fluid-tight container discharge outlet end opening suitable for reading is not less than M rice, the length stretched under the fluid-tight vessel level is not less than L rice, 0.1～10 meter of the span of M, 0～10 meter of the span of L.
Further, the diameter of drainpipe should meet the requirement of this effect condensed water elimination water yield, and diameter should not be too large, 0.001～1 meter of diameter span.
Further, the fluid-tight container should guarantee enough large volume, and all drainpipes that the volume of the downward L rice of the fluid-tight container discharge outlet end opening height of multi-effect evaporator self-draining arrangement should be greater than access form the cumulative volume of water column under vacuum condition.
Self-draining method for multi-effect evaporator provided by the invention and device, traditional multi-effect evaporator Auto-drainage complicated operation, the problem that labour intensity is high, maintenance cost is high and the service efficiency of multi-effect evaporator is low have been solved, there is simple in structure, long service life, maintenance cost is low, simple to operate, reduced the equipment configuration, improve reliability of operation, realized Auto-drainage truly.
The accompanying drawing explanation
Fig. 1 is the flow chart of the self-draining method for multi-effect evaporator provided by the invention;
Fig. 2 is the structure chart of the self-draining arrangement of multi-effect evaporator provided by the invention.
In figure: 1, steam-water separator; 1-1, steam-water separator import; 1-2, steam-water separator exhaust outlet; 1-3, steam-water separator discharge outlet; 2, drainpipe; 3, fluid-tight container.
The specific embodiment
1 the present invention will be described by reference to the accompanying drawings, and the present invention is achieved in that a kind of self-draining method for multi-effect evaporator, and the method comprises:
S101: the condensed water of indirect steam after the heat exchanger heat exchange enters steam-water separator, and gas is inhaled into vacuum system, and water flows into drainpipe;
S102: by the adjusting of vacuum system, make multi-effect evaporator form vacuum gradient, and then produce the boiling point gradient;
S103: in running, when the vacuum of this multi-effect evaporator reaches the regulation required value, the water column that will form corresponding height in drainpipe overcomes vacuum, realizes Auto-drainage;
S104: the condensed water that evaporation produces, under the effect of gravity, automatically enters the fluid-tight container, more automatically discharges multi-effect evaporation system from fluid-tight container discharge outlet.
2 the present invention will be described by reference to the accompanying drawings, and the present invention is achieved in that a kind of self-draining arrangement for multi-effect evaporator, and this device comprises steam-water separator, drainpipe and fluid-tight container:
The import of steam-water separator is connected with the steam-condensation water out of indirect steam heat exchanger, for realizing separating of gas and water;
Drainpipe is connected with the discharge outlet of steam-water separator, for the passage of water discharge is provided;
The exhaust outlet of steam-water separator is connected with vacuum system, for gas is entered in vacuum system, is regulated;
The fluid-tight container is connected with drainpipe, and drainpipe stretches under the liquid level of fluid-tight container, and after vacuum is opened, the drainpipe lower end mouth of pipe still is immersed in water, and can directly not contact with air, for storing drainpipe, forms the liquid of water column under vacuum condition.
Further, the fluid-tight container can be pond, groove, tank etc., and each effect can independently arrange, and also can share;
Further, the length of drainpipe is answered long enough, multi-effect evaporator vacuum is the M meter water column, the length of the drainpipe of multi-effect evaporator self-draining arrangement should be greater than (M+L) rice, be that the drainpipe height to fluid-tight container discharge outlet end opening suitable for reading is not less than M rice, the length stretched under the fluid-tight vessel level is not less than L rice;
Further, the diameter of drainpipe should meet the requirement of this effect condensed water elimination water yield, and diameter should not be too large;
Further, the fluid-tight container should guarantee enough large volume, and all drainpipes that the volume of the downward L rice of the fluid-tight container discharge outlet end opening height of multi-effect evaporator self-draining arrangement should be greater than access form the cumulative volume of water column under vacuum condition.
The self-draining arrangement of each effect of multi-effect evaporator provided by the invention forms by the drainpipe of a steam-water separator, the enough length of a rhizopodium and the fluid-tight container (pond, groove, tank etc., can share) of enough volume.The import of steam-water separator is connected with the steam-condensation water out of this effect indirect steam heat exchanger, the exhaust outlet of steam-water separator is connected with vacuum system, the discharge outlet of steam-water separator is connected with the drainpipe upper end, the drainpipe lower end is stretched under the liquid level of fluid-tight container, so that after vacuum is opened, the drainpipe lower end mouth of pipe still is immersed in water, and can directly not contact with air.Come the steam condensate (SC) of automatic heat-exchanger at first to enter steam-water separator, gas is inhaled into vacuum system, and water flows into drainpipe, enters the fluid-tight container under Action of Gravity Field, and then multi-effect evaporation system is discharged in gravity flow.By the adjusting of vacuum system, make each effect form vacuum gradient, and then produce the boiling point gradient.
Example 1: the vacuum of multi-effect evaporator effect is 0.085MPa, the length of the drainpipe of this single-effect evaporator self-draining arrangement should be greater than (8.5+L) rice (be that the drainpipe height to fluid-tight container discharge outlet end opening suitable for reading is not less than 8.5 meters, the length stretched under the fluid-tight vessel level is not less than L rice), the diameter of drainpipe should meet the requirement (diameter should not be too large) of this effect condensed water elimination water yield; All drainpipes that the volume of the downward L rice of the fluid-tight container discharge outlet end opening height of this single-effect evaporator self-draining arrangement should be greater than access form the water column cumulative volume under vacuum condition; In running, when this effect vacuum reaches 0.085MPa, will form water column in drainpipe and overcome vacuum, the condensed water that evaporation produces, under the effect of gravity, automatically enters the fluid-tight container, more automatically discharges multi-effect evaporation system from fluid-tight container discharge outlet.
Example 2: the vacuum of multi-effect evaporator effect is 0.05MPa, should to be greater than (5+L ') rice (be that the drainpipe height to fluid-tight container discharge outlet end opening suitable for reading is not less than 5 meters to the length of the drainpipe of this single-effect evaporator self-draining arrangement, the length stretched under the fluid-tight vessel level is not less than L ' rice), the diameter of drainpipe should meet the requirement (diameter should not be too large) of this effect condensed water elimination water yield; All drainpipes that the volume of the downward L ' meter Gao Du of fluid-tight container discharge outlet end opening of this single-effect evaporator self-draining arrangement should be greater than access form the cumulative volume of water column under vacuum condition; In running, when this effect vacuum reaches 0.05MPa, will form water column in drainpipe and overcome vacuum, the condensed water that evaporation produces, under the effect of gravity, automatically enters the fluid-tight container, more automatically discharges multi-effect evaporation system from fluid-tight container discharge outlet.
The present invention is by promoting the setting height(from bottom) of multi-effect evaporator equipment, make the discharge outlet of respectively imitating condensed water meet or exceed and respectively imitate the liquid-column height that vacuum produces to the height of fluid-tight vessel level, utilize fluid-tight to overcome and respectively imitate vacuum, realize the Auto-drainage of condensed water by drainpipe.
Certainly; the present invention also can have other embodiment; in the situation that do not deviate from spirit of the present invention and essence thereof; the person of ordinary skill in the field is when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of claim of the present invention.
Claims (6)
1. the self-draining method for multi-effect evaporator, is characterized in that, the method comprises:
Step 1: the condensed water of indirect steam after the heat exchanger heat exchange enters steam-water separator, and gas is inhaled into vacuum system, and water flows into drainpipe;
Step 2: by the adjusting of vacuum system, make multi-effect evaporator form vacuum gradient, and then produce the boiling point gradient;
Step 3: in running, when the vacuum of this multi-effect evaporator reaches the regulation required value, will form water column in drainpipe and overcome vacuum, and realize Auto-drainage;
Step 4: the condensed water that evaporation produces, under the effect of gravity, automatically enters the fluid-tight container, more automatically discharges multi-effect evaporation system from fluid-tight container discharge outlet.
2. the self-draining arrangement for multi-effect evaporator, is characterized in that, this device comprises steam-water separator, drainpipe and fluid-tight container:
The import of steam-water separator is connected with the steam-condensation water out of indirect steam heat exchanger, for realizing separating of gas and water;
Drainpipe is connected with the discharge outlet of steam-water separator, for the passage of water discharge is provided;
The exhaust outlet of steam-water separator is connected with vacuum system, for gas is entered in vacuum system, is regulated;
The fluid-tight container is connected with drainpipe, and drainpipe stretches under the liquid level of fluid-tight container, and after vacuum is opened, the drainpipe lower end mouth of pipe still is immersed in water, and can directly not contact with air, for storing drainpipe, forms the liquid of water column under vacuum.
3. the self-draining arrangement for multi-effect evaporator as claimed in claim 2, is characterized in that, the fluid-tight container can be pond, groove, tank, can independently arrange, and also can share.
4. the self-draining arrangement for multi-effect evaporator as claimed in claim 2, it is characterized in that, the length of drainpipe is answered long enough, multi-effect evaporator effect vacuum is the M meter water column, the length of the drainpipe of this single-effect evaporator self-draining arrangement should be greater than M+L rice, and the drainpipe height to fluid-tight container discharge outlet end opening suitable for reading is not less than M rice, and the length stretched under the fluid-tight vessel level is not less than L rice, 0.1～10 meter of the span of M, 0～10 meter of the span of L.
5. the self-draining arrangement for multi-effect evaporator as claimed in claim 2, is characterized in that, the diameter of drainpipe should meet the requirement of this effect condensed water elimination water yield, and diameter should not be too large, 0.001～1 meter of diameter span.
6. the self-draining arrangement for multi-effect evaporator as claimed in claim 2, it is characterized in that, the fluid-tight container should guarantee enough large volume, and all drainpipes that the volume of the downward L rice of the fluid-tight container discharge outlet end opening height of multi-effect evaporator self-draining arrangement should be greater than access form the cumulative volume of water column under vacuum condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310421040.9A CN103480166A (en) | 2013-09-16 | 2013-09-16 | Automatic water discharging method and device used for multi-effect evaporator |
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| CN201310421040.9A CN103480166A (en) | 2013-09-16 | 2013-09-16 | Automatic water discharging method and device used for multi-effect evaporator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1493380A (en) * | 2003-08-25 | 2004-05-05 | 正大青春宝药业有限公司 | Automatic water draining pressure reducing concentrator |
| WO2004074187A1 (en) * | 2003-02-21 | 2004-09-02 | Abraham Ebenezer Muthunayagam | A process, system and design for desalination of sea water |
| CN201253495Y (en) * | 2008-08-05 | 2009-06-10 | 温州市天龙轻工设备有限公司 | Automatic bailer of concentration device at vacuum state |
| CN101972553B (en) * | 2010-09-30 | 2013-06-05 | 温州市天龙轻工设备有限公司 | Device for discharging condensed liquid in vacuum state |
| CN203483890U (en) * | 2013-09-16 | 2014-03-19 | 江苏汇昇环保科技有限公司 | Automatic draining device for multi-effect evaporator |
-
2013
- 2013-09-16 CN CN201310421040.9A patent/CN103480166A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004074187A1 (en) * | 2003-02-21 | 2004-09-02 | Abraham Ebenezer Muthunayagam | A process, system and design for desalination of sea water |
| CN1493380A (en) * | 2003-08-25 | 2004-05-05 | 正大青春宝药业有限公司 | Automatic water draining pressure reducing concentrator |
| CN201253495Y (en) * | 2008-08-05 | 2009-06-10 | 温州市天龙轻工设备有限公司 | Automatic bailer of concentration device at vacuum state |
| CN101972553B (en) * | 2010-09-30 | 2013-06-05 | 温州市天龙轻工设备有限公司 | Device for discharging condensed liquid in vacuum state |
| CN203483890U (en) * | 2013-09-16 | 2014-03-19 | 江苏汇昇环保科技有限公司 | Automatic draining device for multi-effect evaporator |
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Application publication date: 20140101 |