CN201764848U

CN201764848U - Finned tube type anticorrosion heat exchanger based on copper tubes and utilizing smoke condensing heat

Info

Publication number: CN201764848U
Application number: CN2010202551152U
Authority: CN
Inventors: 王随林; 刘贵昌; 潘树源
Original assignee: Dalian University of Technology; Beijing University of Civil Engineering and Architecture
Current assignee: Dalian University of Technology; Beijing University of Civil Engineering and Architecture
Priority date: 2010-07-01
Filing date: 2010-07-01
Publication date: 2011-03-16
Anticipated expiration: 2020-07-01

Abstract

A finned tube type anticorrosion heat exchanger based on copper tubes and utilizing smoke condensing heat belongs to the field of metal anticorrosion and condensing heat exchange equipment. The heat exchange comprises finned copper tubes and copper fins or aluminum-alloy fins arranged on the finned tube, the surface of each finned copper tube is coated with an amorphous nickel-copper-phosphorus composite coating layer which utilizes sodium molybdate as additive, an organic coating layer is coated on the composite coating layer, and the copper fins or aluminum-alloy fins are also coated with organic coating layers. Aiming at characteristics that condensation heat exchangers are always in electrochemical corrosion, large in finned areas and high in coating material consumption and according to the strategy of protecting key portions intensively, structures and surface protection of the heat exchanger are optimized and combined, so that the heat exchanger has the advantages of simple processing, low cost, fine heat transfer property, corrosion resistance and the like, and reduces manufacturing cost of products to the utmost extent on the premise of keeping safe running of heat exchange devices, thereby increasing practicability and economical efficiency of the like products further.

Description

What utilize flue gas to condense thermal energy is the finned-tube anticorrosion heat exchanger of parent tube with the red copper

Technical field

The utility model relates to the heat-exchanger rig that gas utilization equipment such as natural gas boiler and Gas Direct-fired Machine, natural gas cogeneration of heat and power are recycled flue gas to condense thermal energy, be particularly related to the combined anti-corrosion heat-exchanger that utilizes flue gas to condense thermal energy, belong to condensing heat-exchange equipment and anti-corrosion of metal and field of energy-saving technology.

Background technology

Gas utilization equipment such as common natural gas boiler and direct combustion machine and natural gas cogeneration of heat and power, exhaust gas temperature is all more than 100 ℃, causes energy waste and to the pollution of environment, its thermal efficiency generally is lower than 90%.

Set up the flue gas condensing heat exchanger at gas utilization equipment afterbody, exhaust gas temperature is dropped to below the flue gas dew point temperature, not only can utilize the smoke evacuation sensible heat, a large amount of latent heat of emitting when a large amount of steam that produce in the time of also can utilizing combustion of natural gas condense, the thermal efficiency can improve 10～20%, in theory, the recycle-water steam latent heat can improve the thermal efficiency 11%, thereby energy savings, and reduce noxious gas emission, condensation water can dissolve and absorb CO in the smoke evacuation simultaneously _X, NO _X, SO _XEtc. the part pernicious gas, flue gas also had certain catharsis.Therefore, research and development flue gas to condense thermal energy recycle device, exploitation condensing gas utilization equipment or transform common gas utilization device systems as the condensing system is efficiently to utilize natural gas, reduce the effective way of environmental pollution.Therefore, research and development flue gas condensing heat exchanger or heat-exchanger rig become science of heat and energy environment engineering field hot subject.

Because water recovery liquid has dissolved part pernicious gas in the flue gas, form and contain the more highly acid corrosive liquid of having of nitrate anion, nitrite anions, chlorate anions and sulfate ion, can cause corrosion by the heat exchanging device, influence its service life.Simultaneously, the common claimed structure compactness of condensing gas utilization equipment, volume is little, in light weight, cost is low.Thereby the anticorrosion and heat and mass that improves condensing heat-exchange equipment is strengthened, is improved cycle equipment life, reduces manufacturing cost and carbon emission, becomes the key problem in technology of exploitation condensing gas utilization equipment.

At present, the condensing heat-exchange device mainly adopts as cast aluminium, aluminium alloy, nickel alloy, stainless steel and teflon materials such as (Teflon) as the heat exchange material in the world.This type of heat transmission equipment difficulty of processing is big, cost is high, the material capacity of heat transmission is poor, is unfavorable for facility compactization.The theory of constructing simultaneously is single, can not be optimized from the selection of equipment each several part to surface treatment, improve performance to greatest extent and reduce cost, make at present this type of cost of goods manufactured height, apply and be restricted.

The heat exchanger corrosion is mainly electrochemical corrosion, and heat exchanger tube is the keypoint part of corrosion protection, and it will be in case perforation will cause leakage accident.Corrosion resistance, heat conductivity, mechanical property and economy in comprehensive utilization different materials and the coated layer physical and chemical performance, be optimized combination utilization, be the renewal on this type of device design concept of research and development, will make that this series products practicality and economy are improved at all.

The utility model content

The purpose of this utility model is the different situations at heat transfer property, corrosion potential and the anticorrosion coated layer of fin parent tube and fin in the condensing heat-exchange device, fin parent tube and fin and surface protecting layer thereof are optimized combination, providing a kind of is the finned-tube anticorrosion heat exchanger of parent tube with the red copper, with heat energy utilization rate, economy and the service life of further raising condensing heat-exchange device.

The technical solution of the utility model is as follows:

It is a kind of that what utilize flue gas to condense thermal energy is the finned-tube anticorrosion heat exchanger of parent tube with the red copper, it is characterized in that: described finned-tube anticorrosion heat exchanger comprises red copper fin parent tube and the copper fin or the aluminium alloy fin that are arranged on the red copper fin parent tube, on the surface of described red copper fin parent tube, be coated with the amorphous ni-cu-p composite deposite that one deck is additive with the sodium molybdate, on composite deposite, also scribble one deck organic coating; Scribble one deck organic coating on described copper fin or the aluminum alloy sheet.

In the technique scheme, described organic coating adopts fluororesin, polyurethane or fluorocarbon resin coating.

The utility model is taked the measure of keypoint part key protection, fin parent tube and fin and surface protecting layer thereof are optimized combination, given full play to corrosion-resistant, the physicochemical characteristics of conducting heat and to give prominence to processing etc. of unlike material and coated layer, make that the device processing and manufacturing is simple, cost is low, good heat-transfer, corrosion-resistant, can be used for gas fired-boiler and gas utilization equipment flue gas heat energy recycle such as direct combustion machine and natural gas cogeneration of heat and power.The condensing heat exchanger that also can be used for condensing gas utilization equipment such as condensing natural gas boiler and Gas Direct-fired Machine, condensing natural gas water heater/stove.

Description of drawings

Fig. 1 for the utility model provide what utilize flue gas to condense thermal energy is the overall structure schematic diagram of the finned-tube anticorrosion heat exchanger of parent tube with the red copper.

The specific embodiment

Below in conjunction with accompanying drawing concrete enforcement of the present utility model is further described.

Fig. 1 for the utility model provide what utilize flue gas to condense thermal energy is the overall structure schematic diagram of the finned-tube anticorrosion heat exchanger of parent tube with the red copper, this combined anti-corrosion heat-exchanger comprises red copper fin parent tube 1 and the fin 2 that is arranged on this red copper fin parent tube, and fin adopts copper fin or aluminium alloy fin; At the surface of described red copper fin parent tube plating one deck is the amorphous ni-cu-p composite deposite of additive with the sodium molybdate, is coated with one deck organic coating then on composite deposite again; Described copper fin or aluminium close and scribble one deck organic coating on the sheet, and organic coating can adopt fluororesin, polyurethane or fluorocarbon resin coating.

During processing and manufacturing, difference processing and fabricating red copper gilled tube and fin, and after its surface carried out preliminary treatment (taking out stains), plating (chemical plating or plating) one deck is the amorphous ni-cu-p composite deposite of additive with the sodium molybdate earlier on the outer surface of red copper fin parent tube, make finned tube heat exchanger with copper fin or aluminium alloy fin then, last on the surface of finned tube heat exchanger again integral body be coated with one deck organic coating.

The utility model one is to be mainly these characteristics of electrochemical corrosion and the fin area is big, consume the many characteristics of coating material for heat exchanger corrosion, the 2nd, take the technical scheme of keypoint part key protection, carry out optimum organization from selection and the surfacecti proteon of fin parent tube and fin, namely be chosen in corrosion potential is slightly high in the condensate liquid red copper as the fin parent tube, the copper that corrosion potential is lower or aluminium alloy be as fin, and then the fin parent tube is carried out respectively different surface treatments with fin; This is not only to guaranteeing the heat-exchanger rig safe operation, and to the energy consumption of simplified processing process, economical with materials and process at utmost, reduces product cost and all be of great significance.

Claims

One kind what utilize flue gas to condense thermal energy is the finned-tube anticorrosion heat exchanger of parent tube with the red copper, it is characterized in that: described finned-tube anticorrosion heat exchanger comprises red copper fin parent tube and the copper fin or the aluminium alloy fin that are arranged on the red copper fin parent tube, on the surface of described red copper fin parent tube, be coated with one deck amorphous ni-cu-p composite deposite, on composite deposite, also scribble one deck organic coating; Scribble one deck organic coating on described copper fin or the aluminum alloy sheet.
2. described what utilize flue gas to condense thermal energy is the finned-tube anticorrosion heat exchanger of parent tube with the red copper according to claim 1, and it is characterized in that: described organic coating adopts fluororesin, polyurethane or fluorocarbon resin coating.