CN203286921U - Heat exchange system with high-chlorine water as heat-transfer medium - Google Patents
Heat exchange system with high-chlorine water as heat-transfer medium Download PDFInfo
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- CN203286921U CN203286921U CN2013200894556U CN201320089455U CN203286921U CN 203286921 U CN203286921 U CN 203286921U CN 2013200894556 U CN2013200894556 U CN 2013200894556U CN 201320089455 U CN201320089455 U CN 201320089455U CN 203286921 U CN203286921 U CN 203286921U
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Abstract
A heat exchange system with high-chlorine water as a heat-transfer medium comprises a working medium heat exchanger, and comprises an open cycle system and a closed cycle system. The open cycle system comprises a closed cycle water cooling device, and the high-chlorine water is used in the closed cycle water cooling device as the heat-transfer medium. The closed cycle system comprises a closed circulating groove and the cooling working medium heat exchanger. A heat exchange pipe in the closed cycle water cooling device is communicated with the closed circulation groove, an outlet of the closed circulating groove is communicated with the cooling working medium heat exchanger, and an outlet of the cooling working medium heat exchanger is communicated with the heat exchange pipe in the closed cycle water cooling device. The high-chlorine cooling water is used for indirectly cooling the stainless steel heat exchanger and is not in direct contact with the stainless steel heat exchanger, the problem that the stainless steel heat exchanger is corroded by the high-chlorine cooling water is completely solved, circulating cooling water is free of losses and concentration, resources are saved, and the stable and reliable operation of a production system is ensured.
Description
Technical field
The utility model relates to a kind of heat-exchanger rig, is specifically related to a kind of heat-exchange system of high chlorine water as heat transfer medium that utilize.
Background technology
Various places are because water quality is different, and in water, the content of chlorion also is not quite similar.In inland, generally use underground water or river to make cooling medium, be cooling water temperature with cooling tower, so circulation.Moisture evaporation is constantly arranged in this process, thus cause total Water reduce with water in chlorine ion concentration increase, the harm of stainless steel equipment is increased, need timely waste discharge and supplement fresh water.In coastal countries and regions, for economizing on resources, producer's meeting choice for use seawater, as cooling medium, has reduced operating cost and cost of equipment when saving cooling tower.As everyone knows, in seawater, the content of chlorion is very high, serious corrosion, thus limited the application of high chlorine water in the stainless steel cooler.This type of aqueous medium heat exchanger need be selected the expensive material manufacturings such as copper alloy, high-grade alloy steel or titanium alloy usually.
For avoiding this problem, most producer selects that cooling water is carried out the film processing makes its chloride ion content reach below safety value or the supplementary fresh water of timely waste discharge.This solution investment is very large, also with the industry energy conservation environmental objective of national requirements, runs counter to.In addition, underground water, river especially contain a large amount of calcium ions and magnesium ions in seawater, and cooling water temperature in heat transfer process raises, and very easily at the heat exchanger tube inwall, form fine and close dirt layer, affect heat exchange, need in time clear up, and have reduced driving rate.Therefore, finding a kind of heat exchanger of high chlorine water or system can utilized is very important.
The utility model content
The utility model provides a kind of heat-exchange system of high chlorine water as heat transfer medium that utilize, to solve corrosion (pitting) problem of high chlorine cooling water to stainless heat exchanger.
For this reason, the technical scheme that adopts is as follows: a kind of high chlorine water, as the heat-exchange system of heat transfer medium, comprises the working media heat exchanger, and described heat-exchange system comprises open-circuit system and closed circuit circulatory system; Described open-circuit system comprises the closed cycle water-cooling apparatus, utilizes high chlorine water to make heat transfer medium in this closed cycle water-cooling apparatus; Described closed circuit circulatory system comprises airtight circulating slot, described cooling work media heat exchanger; Heat exchanger tube in described closed cycle water-cooling apparatus is communicated with described airtight circulating slot, the outlet of the circulating slot that this is airtight is communicated with described cooling work media heat exchanger, and the outlet of cooling work media heat exchanger is communicated with the heat exchanger tube in described closed cycle water-cooling apparatus.
On the inlet channel of described airtight circulating slot, water intaking valve is set.
Described closed cycle water-cooling apparatus is cathodic protection carbon steel water-water heat exchanger.
Reference electrode in the cathode protection device of described cathodic protection carbon steel water-water heat exchanger adopts solid electrode; Impressed current anode adopts investigation of titanium anode coated with metal oxide.
The utility model is used the cooling water of standard compliant recirculated cooling water as stainless heat exchanger, pass through the water-water heat exchanger cooling circulating cooling water with high chlorine cooling water again, be not in direct contact with it thereby reach with the indirect cooling stainless heat exchanger of high chlorine cooling water, solved the etching problem of high chlorine cooling water to stainless heat exchanger fully, and the recirculated cooling water free of losses, without concentrated, saved resource and guaranteed again the reliable and stable operation of production system.
The utility model can be widely used in heat transfer system take high chlorine water as heat transfer medium, as hydrocracking unit in petrochemical industry petroleum refining industry, and the heat-exchange system of generating cooling water system, metallurgical smelting furnace cooling water system and offshore oil platform etc.
Description of drawings
Fig. 1 is the utility model process flow diagram.
Fig. 2 is the utility model water-water heat exchanger cathodic protection schematic diagram (take shell-and-tube heat exchanger as example).In figure: 1 is impressed current anode, and 2,3 is reference electrode I, II.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model and beneficial effect thereof are described in further detail.
With reference to Fig. 1, a kind of high chlorine water, as the heat-exchange system of heat transfer medium, comprises working media heat exchanger Es, and described heat-exchange system comprises open-circuit system and closed circuit circulatory system; Described open-circuit system comprises closed cycle water-cooling apparatus Ew, utilizes high chlorine water to make the cooling closed circulating water system of heat transfer medium heat exchange in this closed cycle water-cooling apparatus Ew; Described closed circuit circulatory system comprises pump and the described cooling work media heat exchanger Es on the outlet conduit of airtight circulating slot V, this airtight circulating slot V; Heat exchanger tube in described closed cycle water-cooling apparatus Ew is communicated with described airtight circulating slot V, the outlet of the circulating slot V that this is airtight is communicated with described cooling work media heat exchanger Es, and the outlet of cooling work media heat exchanger Es is communicated with the heat exchanger tube in described closed cycle water-cooling apparatus Ew.Thus, the heat exchange with working media is completed in the closed cycle of closed circulating water system.
Job step of the present utility model is as follows:
At first need to obtain a certain amount of closed circulating water system through water treatment.
In logistics F1, with water pump P, the closed circulating water system of aequum is delivered to working media heat exchanger Es, carry out heat exchange in stainless heat exchanger in this embodiment.
In logistics F2, closed circulating water system and thermal medium raise through heat-exchange temperature, enter afterwards water-water heat exchanger and use the open circuit recirculated water from cooling tower or seawater to carry out cooling.
In logistics F3, enter circulating slot through cooling closed circulating water system and recycle.
In logistics F4, from the open circuit recirculated water of cooling tower or seawater, enter the heat exchanger heat exchange.
In logistics F5, through the open circuit recirculated water that heat exchange heats up, get back to cooling tower or seawater.
In logistics F6, to circulating water chennel supply closed circulating water system.
For logistics F4 and F5, be divided into two kinds of situations: a kind of situation, open circuit recirculated water from cooling tower raises through heat-exchange temperature, open circuit recirculated water is got back to cooling tower and is lowered the temperature, this cooling is by water and cross-ventilation evaporative cooling, the a large amount of losses of moisture are concentrated, cause chlorine ion concentration in cooling tower water constantly to raise; Another kind of situation, get back in seawater by step S5 after heat exchange from the open circuit recirculated water of seawater, and seawater itself contains a large amount of chlorions and calcium ions and magnesium ions.Water-water heat exchanger is carbon steel material, and is strong than stainless steel anti-chlorine ion corrosion ability, adds cathodic protection system better effects if afterwards.So, for the cooling water from cooling tower, need not frequently discharge the water of high chloride ion and add continually fresh water to dilute, also saving a large amount of recirculated waters when reducing blowdown; For seawater, make the high seawater of chloride ion content be utilized, also recirculated water is entered marine simultaneously; The utility model makes the utilization of two kinds of recirculated cooling waters be enterprise and brings environmental protection and economic dual interests;
On the inlet channel of described airtight circulating slot V, water intaking valve is set, for logistics F6, although closed circulating water system is among the system of a sealing, after experience circulates for a long time, do not have the problem of moisture evaporation, but may because of the sealing of some areas not problem cause the closed cycle water yield to reduce.Therefore, need in case of necessity a small amount of closed circulating water system of supply.The evaporation of phase open-circuit recirculated water, the loss amount of closed circulating water system is very little.
With reference to accompanying drawing 2, described closed cycle water-cooling apparatus Ew is cathodic protection carbon steel water-water heat exchanger.This carbon steel water-water heat exchanger, can make a general reference shell-and-tube heat exchanger, the various forms heat exchangers such as plate type heat exchanger, coil heat exchanger, jacketed type exchanger.
In the present embodiment, the explanation as an example of shell-and-tube heat exchanger example, comprise heat exchanger body, impressed current anode, reference electrode and cathodic protection controller, and heat exchanger body is made by carbon steel, and the contact-making surface of heat exchanger shell pass and salt solution is negative electrode, is object of protection; The impressed current anode that plays electric action is arranged in the middle of tube bank, is parallel to heat exchanger tube, can be one or more, by cast iron, graphite, alloy or coating metal, is made; Two reference electrodes are arranged on cylindrical shell, and cathodic protection controller and negative electrode, anode and reference electrode are connected respectively.
The utility model especially is studied for cathode protecting parameter, determines that the best protection current potential is Δ E=-100mV, namely negative electrode to negative potential direction polarization 100mV; Determine that minimum protective current density is 0.072A/m2; Screened a kind of in salt solution the stable solid reference electrode (solid of 20# carbon steel, high purity zinc, high purity iron, silver, the powder sintered one-tenth of silver chlorate) of current potential, make reference electrode, make current potential stable, long service life; And need not to add filling liquid, need not to consider pressure compensation, can not polluted by the suspension in industrial wastewater and incrustation scale, is the few long effective reference electrode of a kind of maintenance work.Impressed current anode adopts investigation of titanium anode coated with metal oxide; Output current density 8A/m
2
, can reach more than 5 years service life in neutral industrial wastewater, after coating of metal oxides is consumed, can be again on the titanium base coated metal oxide and continue to use, greatly reduce the maintenance cost of impressed current anode.
Generally speaking, the utility model of closed circuit circulatory system add the cathode protection technology of carbon steel make high chlorine water can safety operating in heat transmission equipment, reduced running cost.Water-water heat exchanger one is opened an acid cooler one that closes relatively former technique and is opened one and close and saved equipment cost, does not affect again driving efficiency simultaneously.For acid cooler, after using closed circuit circulatory system, chloride ion corrosion and the scale problems of water side all are resolved, and have greatly extended the service life of stainless heat exchanger.
Claims (4)
1. a high chlorine water, as the heat-exchange system of heat transfer medium, comprises working media heat exchanger (Es), and it is characterized in that: described heat-exchange system comprises open-circuit system and closed circuit circulatory system; Described open-circuit system comprises closed cycle water-cooling apparatus (Ew), utilizes high chlorine water to make heat transfer medium in this closed cycle water-cooling apparatus (Ew); Described closed circuit circulatory system comprises airtight circulating slot (V), described cooling work media heat exchanger (Es); Heat exchanger tube in described closed cycle water-cooling apparatus (Ew) is communicated with described airtight circulating slot (V), the outlet of this airtight circulating slot (V) is communicated with described cooling work media heat exchanger (Es), and the outlet of cooling work media heat exchanger (Es) is communicated with the heat exchanger tube in described closed cycle water-cooling apparatus (Ew).
2. a kind of high chlorine water according to claim 1, as the heat-exchange system of heat transfer medium, is characterized in that: on the inlet channel of described airtight circulating slot (V), water intaking valve is set.
3. a kind of high chlorine water according to claim 1, as the heat-exchange system of heat transfer medium, is characterized in that: described closed cycle water-cooling apparatus (Ew) is cathodic protection carbon steel water-water heat exchanger.
4. a kind of high chlorine water according to claim 3, as the heat-exchange system of heat transfer medium, is characterized in that: the reference electrode in the cathode protection device of described cathodic protection carbon steel water-water heat exchanger adopts solid electrode; Impressed current anode adopts investigation of titanium anode coated with metal oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200894556U CN203286921U (en) | 2013-02-27 | 2013-02-27 | Heat exchange system with high-chlorine water as heat-transfer medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200894556U CN203286921U (en) | 2013-02-27 | 2013-02-27 | Heat exchange system with high-chlorine water as heat-transfer medium |
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| CN203286921U true CN203286921U (en) | 2013-11-13 |
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| CN2013200894556U Expired - Lifetime CN203286921U (en) | 2013-02-27 | 2013-02-27 | Heat exchange system with high-chlorine water as heat-transfer medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674775A (en) * | 2016-03-16 | 2016-06-15 | 福建邵化化工有限公司 | Ammonia cooler cooling system used for cooling decarburization raw material gas in ammonia synthesis enterprise |
-
2013
- 2013-02-27 CN CN2013200894556U patent/CN203286921U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674775A (en) * | 2016-03-16 | 2016-06-15 | 福建邵化化工有限公司 | Ammonia cooler cooling system used for cooling decarburization raw material gas in ammonia synthesis enterprise |
| CN105674775B (en) * | 2016-03-16 | 2017-10-20 | 福建邵化化工有限公司 | A kind of ammonia cooler cooling system for ammonia enterprise decarburization raw material air cooling |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |
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| CX01 | Expiry of patent term |