CN202638006U - Dual-circulation filtering device for evaporation system - Google Patents
Dual-circulation filtering device for evaporation system Download PDFInfo
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- CN202638006U CN202638006U CN 201220297595 CN201220297595U CN202638006U CN 202638006 U CN202638006 U CN 202638006U CN 201220297595 CN201220297595 CN 201220297595 CN 201220297595 U CN201220297595 U CN 201220297595U CN 202638006 U CN202638006 U CN 202638006U
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Abstract
The utility model relates to a dual-circulation filtering device for an evaporation system and belongs to the technical field of industrial evaporation. The technical scheme is as follows: the dual-circulation filtering device comprises a liquid-collecting separator (1), a liquid down-flow pipe (2), a filter (3), a heat exchanger (4) and a gas ascending pipe (5), wherein the mounting position of the liquid-collecting separator is higher than that of the heat exchanger, the filter is arranged between the liquid-collecting separator and the heat exchanger, the inlet of the filter is connected with the liquid down-flow pipe of the liquid-collecting separator, the outlet of the filter is connected with a liquid inlet which is formed at the lower part of the heat exchanger, the liquid phase bottommost end of the heat exchanger is connected with the inlet of a circulating pump, and the top of the heat exchanger is connected with the liquid-collecting separator through the gas ascending pipe. With the dual-circulation filtering system, the dual-circulation filtering device has the advantages of simple structure, convenience for maintenance and low equipment investment; and the impurity content and the discharge volume of the circulating liquid are reduced by more than 80% respectively, which achieves the purpose of clean operation of the circulating liquid, effectively improves the gas quality and well solves the problems of equipment corrosion, scale formation, blockage and the like.
Description
Technical field
The utility model relates to the two circulation filters of a kind of vapo(u)rization system, belongs to industrial evaporation technique field.
Background technology
Evaporation is one of the most basic industrial unit operations, uses very extensive.At present, the vapo(u)rization system of using on all types of industries field, mostly take a certain amount of circulation fluid is effluxed to keep the method for impurity content within set quota such as turbidity, total solid of vapo(u)rization system circulation fluid, guarantee the normal operation of quality and the vapo(u)rization system of gas, the position operated by rotary motion of circulation fluid emission point is in the minimum point of system, for example: the circulation fluid emission point is arranged on the bottom of steam boiler drum, drum, lower header, and the circulation fluid emission point is arranged on the bottom of vapo(u)rization system reboiler, evaporimeter etc.There is the problem of following several respects in said structure: the one, the floating and impurity that suspends in the circulation fluid, with liquid intermiscibility impurity etc. be to discharge, even take to strengthen the way of circulation fluid discharge capacity, this class impurity also can't all be discharged vapo(u)rization system, strengthen circulation fluid and discharge a large amount of wastes that caused circulation fluid, some cost that also causes environmental pollution or cause follow-up pollutant to process increases considerably; For example, State Standard of the People's Republic of China GBl576-2001 Industrial Boiler water standard has only been stipulated the feedwater indicator of suspended solids, but the suspension in the pot water is not stipulated specific targets, illustrates that the harm to suspension and floating thing in the pot water does not cause concern; Suspension content is 5mg/L in the steam boiler feedwater, blowdown flow rate is by 2% control, and evaporation capacity is the continuously operation after 3 months of steam boiler of 100t/h, compares with feedwater that suspension content will improve thousands of times in pot water, the quality of pot water is very poor, impurity content is very high, can only strengthen blowdown flow rate.The 2nd, a large amount of dischargings of circulation fluid have caused the waste of heat; For example, steam boiler pot water discharge capacity is generally the 2-5%(percentage by weight to water inventory), what steam boiler discharged is the water of the higher saturation temperature of calorific value, although some device has been taked the recuperation of heat measure, but heat recovery efficiency is very low, has also increased investment simultaneously.The 3rd, the impurity content in the vapo(u)rization system circulation fluid is higher, inferior quality, the quality of circulation fluid is identical or approaching with the liquid quality of discharging, if reduce the discharging of circulation fluid, can only make the turbidity of circulation fluid, total solid and index of correlation increase, the quality of circulation fluid is further descended, cause in the gas medium impurity content higher, GAS QUALITY is poorer, affect gas user's normal use, also can cause the vapo(u)rization system equipment corrosion simultaneously, fouling, the problems such as obstruction are further aggravated, and therefore must control larger circulation fluid discharge capacity keeps impurity content lower in the circulation fluid; For example, the impurity content height can cause that the impurity content height causes steam superheater heat exchange pipeline inwall or turbine blade fouling in the water vapour in the electricity generation boiler pot water, causes generator efficiency to reduce or device damage; Silver-colored method formaldehyde production device methyl alcohol vapo(u)rization system circulation fluid impurity content height causes impurity content height in the methanol gas for another example, causes silver catalyst to poison or decline in service life, and the formaldehyde cost increases; Ammonia production system conversion saturated hot-water tower recirculated water impurity content height causes exporting impurity content height in the coal gas for another example, causes that conversion catalyst poisoning or service life reduce etc.
Existing vapo(u)rization system has only been carried out purification or deep purifying to replenishing liquid or fresh liquid, as the used steam boiler of large-scale power station require feedwater conductivity≤1.0us/s or≤0.5us/s, but stove water conductivity working control index is hundreds of us/s even thousands of us/s; Impurity content in the circulation fluid is generally tens times that replenish the fresh liquid impurity content, even reaches more than the hundred times, relies on the circulation fluid that discharges a greater number to keep the impurity content of low concentration in the circulation fluid.
The vapo(u)rization system of background technology, fresh liquid adds in the vapo(u)rization system circulation fluid, liquid constantly is evaporated to gas, liquid concentration, remaining impurity will inevitably be accumulated in the concentrated circulation fluid, because the circulation fluid discharge capacity can not be infinitely great, so the impurity content in the circulation fluid also can not fall too low, bring thus that gaseous impurity content is higher to be affected the gas user and use etc., also can come a series of problems such as equipment corrosion, fouling, obstruction because of circulation fluid impurity content higher band.
The utility model content
The utility model purpose provides the two circulation filters of a kind of vapo(u)rization system, simple and reliable for structure, small investment, operating cost is low, result of use good, but long term maintenance vapo(u)rization system circulation fluid cleans, impurity content is low, make the quality of circulation fluid near fresh liquid, solve the problems referred to above that exist in the background technology.
The technical solution of the utility model is:The two circulation filters of a kind of vapo(u)rization system, comprise liquid collecting separator, downspout, filter, heat exchanger and riser, the installation site of liquid collecting separator is higher than the installation site of heat exchanger, filter is installed between liquid collecting separator and the heat exchanger, filter inlet links to each other with the downspout of liquid collecting separator, filter outlet is connected with the liquid-inlet of heat exchanger bottom, and the top of heat exchanger is connected with the liquid collecting separator by riser.
The utility model also is provided with circulating pump, and circulating pump and filter are arranged in parallel, and pump inlet links to each other with the liquid phase least significant end of heat exchanger, and circulating-pump outlet is connected with filter inlet; Because the liquid suspension that heat exchanger is discharged is more, the effect of circulating pump is forced circulation, improves filter efficiency.
On the described filter sewage draining exit is set, regularly or continuously the material that filters out is discharged.
Described liquid collecting separator is provided with fresh liquid and replenishes mouth, for system replenishes fresh circulation fluid, keeps balance.
Filter can arrange one, also many filters can be set, parallel connection or series operation.
The kind of filter can adopt the different versions such as machinery, filler, filtrate, filter core, kind and content according to impurity in the kind of vapo(u)rization system circulation fluid and the circulation fluid are determined, satisfy simultaneously the needs of vapo(u)rization system temperature, pressure and other parameters, can select a kind of version, also can select the various structures form to mix and use.
Filter inlet and filter outlet are provided with pressure indication and report to the police, and exceed standard automatic switchover filter and change filtrate of filter resistance is guaranteed the safe operation of vapo(u)rization system.
In the steam boiler vapo(u)rization system, described liquid collecting separator is upper drum, and described heat exchanger is furnace chamber heat exchange tube and lower header, and filter inlet links to each other with the downspout of upper drum, and filter outlet is connected with the liquid-inlet of lower header bottom; The liquid phase least significant end of lower header is connected with pump inlet, and the top of furnace chamber heat exchange tube is connected with the liquid collecting separator by riser.
In silver-colored Division A League Matches of French Football alcohol vapo(u)rization system, described liquid collecting separator is evaporimeter, and described heat exchanger is reboiler.
In all kinds of heat recovery systems, described liquid collecting separator is drum, and described heat exchanger is for the equipment that reclaims heat.
The utility model course of work: between the downspout of liquid collecting separator bottom and heat exchanger liquid phase inlet tube, set up filter, the liquid collecting separator is separated circulation fluid and is entered into filter inlet by downspout, circulation fluid relies on the poor filter that automatically enters of liquid level, through entering heat exchanger after the filter filtration, circulation fluid forms gas-liquid mixture and enters the liquid collecting separator and carry out gas-liquid separation behind the absorbing heat in heat exchanger, isolated gas gives next user to use, isolated liquid returns filter by the liquid collecting separator and filters, and is first circulated filter system; Impurity and the liquid that discharges the heat exchanger bottom turn back to filter inlet, refilters, and be second circulated filter system.
Described second goes back filtration system is provided with circulating pump, circulating pump and filter are arranged in parallel, pump inlet links to each other with the liquid phase least significant end of heat exchanger, circulating-pump outlet is connected with filter inlet, because the liquid that heat exchanger is discharged contains partial impurities, the effect of circulating pump is forced circulation, improves the filter efficiency of system.
On the described filter sewage draining exit is set, regularly or continuously the material that filters out is discharged.
Described liquid collecting separator is provided with fresh liquid and replenishes mouth, for system replenishes fresh circulation fluid, keeps balance.The circulation fluid of fresh liquid can also replenish in filter inlet.
Two circulating filtrations described in the utility model, first circulating filtration are that major cycle is filtered, and second circulating filtration is secondary circulating filtration.Major cycle is filtered into: circulation fluid relies on liquid level difference automatically to enter filter by liquid collecting separator outlet at bottom downspout, and the liquid after the filtration enters heat exchanger heat absorption evaporation automatically; Gas-liquid mixture after the evaporation enters the liquid collecting separator and carries out gas-liquid separation, and gas is given the user and used, and liquid is got back to recursive filter by the liquid collecting separator again and filtered, so constantly circulation, and circulation fluid is constantly filtered; Secondary circulating filtration is: the impurity of heat exchanger bottom deposition turns back to filter inlet by the circulating pump conveying and filters, to guarantee impurity content lower in the heat exchanger bottom liquid; Two filtration systems can share a filter, also filter can be set separately.
Continuously operation is filtered in major cycle, the continuous or intermitten service of secondary circulating filtration all can, can regulate according to the circulation fluid quality.
The utility model good effect: have for the described vapo(u)rization system of background technology that the fluid discharge amount is large, circulation fluid poor quality impurity content high, GAS QUALITY is poor, equipment corrosion, fouling, obstruction etc. problem, two circulation filters are set, and the problems referred to above of configuration and the existence of the suitable filter solution of circulation fluid medium background technology; The utility model is simple in structure, easy to maintenance, equipment investment is few, comparing the circulation fluid impurity content with background technology and effluxing quantity reduces respectively more than 80%, realize the target of circulation fluid cleaning operation, GAS QUALITY is improved, equipment corrosion, fouling, obstruction etc. problem effectively alleviated.The utility model can use at all kinds of steam boilers, all kinds of recuperation of heat byproduct steam system, all kinds of rectifying, evaporation, gasification installation.
Description of drawings
Accompanying drawing 1 is the background technology schematic diagram;
Accompanying drawing 2 is the utility model schematic diagrames;
Accompanying drawing 3 is the utility model embodiment one schematic diagrames;
Accompanying drawing 4 is the utility model embodiment two schematic diagrames;
Among the figure: liquid collecting separator 1, downspout 2, filter 3, heat exchanger 4, riser 5, circulating pump 6, sewage draining exit 7, fresh liquid are replenished mouth 8, upper drum 9, furnace chamber heat exchange tube 10, lower header 11, evaporimeter 12, reboiler 13, steam turbine generator 14, steam superheater 15.
The specific embodiment
Below in conjunction with width of cloth figure, by embodiment, the utility model is described in further detail.
With reference to accompanying drawing 1, the course of work of background technology vapo(u)rization system: the liquid in the liquid collecting separator directly enters heat exchanger by the bottom downspout, liquid forms gas-liquid mixture behind the absorbing heat in heat exchanger, enter the liquid collecting separator by riser and carry out gas-liquid separation, gas is given the user and is used, liquid returns heat exchanger and continues evaporation, fresh liquid fills into the liquid collecting separator, by the bottom of liquid collecting separator and the bottom discharge unit circulation fluid of heat exchanger, to keep certain density impurity content in the circulation fluid, impurity content in the circulation fluid is identical or approaching with impurity content in the circulation fluid of discharging, and the circulation fluid discharge capacity is larger, the inferior quality of circulation fluid.
With reference to accompanying drawing 2, the two circulation filters of a kind of vapo(u)rization system, comprise liquid collecting separator 1, downspout 2, filter 3, heat exchanger 4 and riser 5, the installation site of liquid collecting separator is higher than the installation site of heat exchanger, filter is installed between liquid collecting separator and the heat exchanger, filter inlet links to each other with the downspout of liquid collecting separator, and filter outlet is connected with the liquid-inlet of heat exchanger bottom; The liquid phase least significant end of heat exchanger is connected with circulating pump 6 imports, and the top of heat exchanger is connected with the liquid collecting separator by riser.The utility model also is provided with circulating pump 6, and circulating pump and filter are arranged in parallel, and pump inlet links to each other with the liquid phase least significant end of heat exchanger, and circulating-pump outlet is connected with filter inlet; Because the liquid impurity that heat exchanger is discharged is more, the effect of circulating pump is forced circulation, improves system's filter efficiency.Sewage draining exit 7 is set on the described filter, regularly or continuously the material that filters out is discharged.Described liquid collecting separator is provided with fresh liquid and replenishes mouth 8, for system replenishes fresh circulation fluid, keeps balance.
The course of work of the present utility model, liquid in the liquid collecting separator directly enters filter by the bottom downspout, liquid after the filtration directly enters heat exchanger, liquid forms gas-liquid mixture behind the absorbing heat in heat exchanger, enter the liquid collecting separator by riser and carry out gas-liquid separation, gas is given the user, liquid returns the liquid collecting separator, fresh liquid fills into liquid collecting separator or filter inlet, the partially liq of heat exchanger bottom by circulating pump continuously or be interrupted and turn back to filter inlet, the material that filter filters out effluxes processing, compares with background technology, and the outer discharge capacity of impurity content and circulation fluid reduces more than 80% respectively in the circulation fluid.
With reference to accompanying drawing 3, in the steam boiler vapo(u)rization system, described liquid collecting separator is upper drum 9, and described heat exchanger is furnace chamber heat exchange tube 10 and lower header 11, filter inlet links to each other with the downspout of upper drum, and filter outlet is connected with the liquid-inlet of lower header bottom; The liquid phase least significant end of lower header is connected with filter inlet, and the top of furnace chamber heat exchange tube furnace chamber heat exchange tube is connected with the liquid collecting separator by riser.
The utility model is used for 35t/h, 3.82MPa single drum steam boiler vapo(u)rization system, adopt the high temperature resistant inorganic filtrate to mix the filter that uses with mechanical filter, desalted water fills into upper drum, water in the upper drum directly enters filter by the bottom downspout, liquid after the filtration enters furnace chamber heat exchange tube by lower header, water forms gas-vapor mix absorb the burner hearth heat in heat exchanger tube after, enter upper drum by riser and carry out carbonated drink separation, steam enters steam superheater and sends into steam turbine generator after overheated, after returning upper drum and the desalted water that replenishes mixes, water continues to enter filter, the water of lower header bottom turns back to filter inlet by the circulating pump interruption of 30-50m3/h, total solid and suspension content reach respectively 〉=10000mg/L in the liquid of filter discharging, be discharged to sewage plant or take additive method to process, total solid and suspension content difference≤200mg/L in the pot water, filter pot water discharge capacity is the 0.1-0.5% to water inventory, compare with background technology, impurity content and pot water discharge capacity reduce more than 80% respectively in the pot water.
With reference to accompanying drawing 4, in silver-colored Division A League Matches of French Football alcohol vapo(u)rization system, described liquid collecting separator is evaporimeter 12, and described heat exchanger is reboiler 13.
The utility model is used for producing per year 50,000 tons of silver-colored method formaldehyde plant methyl alcohol vapo(u)rization systems, employing has the inorganic filtrate of specific adsorption function, liquid fresh methanol fills into filter inlet, methyl alcohol in the evaporimeter directly enters filter by the bottom downspout, methyl alcohol after the filtration forms gas-liquid mixture behind the absorbing heat in reboiler, enter evaporimeter by riser and carry out vapor-liquid separation, methanol gas enters subsequent processing, the liquid Returning evaporimeter enters filter with fresh methanol, iterative cycles like this, the liquid of reboiler bottom turns back to filter inlet by the circulating pump interruption of 10-20m3/h, impurity in the liquid is adsorbed by the filtrate in the filter, changed a filtrate in every interval 1-3 month, the filtrate that changes carries out burning disposal, and it is 0 that circulation fluid effluxes, filtrate can be recycled after advanced treating, circulation fluid turbidity in the vapo(u)rization system reboiler≤10, the catalyst life cycle on average prolonged more than 20 days, and formaldehyde consumes the methyl alcohol unit consumption to be reduced more than the 2kg.
Claims (7)
1. two circulation filters of a vapo(u)rization system, it is characterized in that comprising liquid collecting separator (1), downspout (2), filter (3), heat exchanger (4) and riser (5), the installation site of liquid collecting separator is higher than the installation site of heat exchanger, filter is installed between liquid collecting separator and the heat exchanger, filter inlet links to each other with the downspout of liquid collecting separator, filter outlet is connected with the liquid-inlet of heat exchanger bottom, and the top of heat exchanger is connected with the liquid collecting separator by riser.
2. two circulation filters of described a kind of vapo(u)rization system according to claim 1, it is characterized in that being provided with circulating pump (6), circulating pump and filter are arranged in parallel, and pump inlet links to each other with the liquid phase least significant end of heat exchanger, and circulating-pump outlet is connected with filter inlet.
3. two circulation filters of described a kind of vapo(u)rization system according to claim 1 and 2 is characterized in that arranging on the described filter sewage draining exit (7), and described liquid collecting separator is provided with fresh liquid and replenishes mouthful (8).
4. two circulation filters of described a kind of vapo(u)rization system according to claim 1 and 2 is characterized in that filter can arrange one, also can arrange many filters, parallel connection or series operation.
5. two circulation filters of described a kind of vapo(u)rization system according to claim 1 and 2, it is characterized in that in the steam boiler vapo(u)rization system, described liquid collecting separator is upper drum (9), described heat exchanger is furnace chamber heat exchange tube (10) and lower header (11), filter inlet links to each other with the downspout of upper drum, and filter outlet is connected with the liquid-inlet of lower header; The liquid phase least significant end of lower header is connected with pump inlet, and the top of furnace chamber heat exchange tube is connected with the liquid collecting separator by riser.
6. two circulation filters of described a kind of vapo(u)rization system according to claim 1 and 2 is characterized in that described liquid collecting separator is evaporimeter (12) in silver-colored Division A League Matches of French Football alcohol vapo(u)rization system, and described heat exchanger is reboiler (13).
7. two circulation filters of described a kind of vapo(u)rization system according to claim 1 and 2 is characterized in that in all kinds of heat recovery systems described liquid collecting separator is drum, and described heat exchanger is supporting equipment for reclaiming heat with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297595 CN202638006U (en) | 2012-06-25 | 2012-06-25 | Dual-circulation filtering device for evaporation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297595 CN202638006U (en) | 2012-06-25 | 2012-06-25 | Dual-circulation filtering device for evaporation system |
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| CN202638006U true CN202638006U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220297595 Withdrawn - After Issue CN202638006U (en) | 2012-06-25 | 2012-06-25 | Dual-circulation filtering device for evaporation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698446A (en) * | 2012-06-25 | 2012-10-03 | 文安县天华密度板有限公司 | Bicirculating filtration method and device of vapourization system |
-
2012
- 2012-06-25 CN CN 201220297595 patent/CN202638006U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698446A (en) * | 2012-06-25 | 2012-10-03 | 文安县天华密度板有限公司 | Bicirculating filtration method and device of vapourization system |
| CN102698446B (en) * | 2012-06-25 | 2014-08-27 | 文安县天华密度板有限公司 | Bicirculating filtration method and device of vapourization system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130102 Effective date of abandoning: 20140827 |
|
| RGAV | Abandon patent right to avoid regrant |