CN2439007Y

CN2439007Y - Heat-pipe heat exchanger

Info

Publication number: CN2439007Y
Application number: CN 00218851
Authority: CN
Inventors: 敖建军; 沃开宇
Original assignee: Shanghai Huali Combustion Equipment Co ltd
Current assignee: Shanghai Huali Combustion Equipment Co ltd
Priority date: 2000-08-15
Filing date: 2000-08-15
Publication date: 2001-07-11
Anticipated expiration: 2010-08-15

Abstract

The utility model relates to a heat pipe heat exchanger, which comprises a heater and a cooler which respectively comprise a casing and a pipe bundle which is arranged in the casing. The utility model is characterized in that the utility model also comprises a plurality of communicating pipes and working solution; the cooler is positioned above the heater, and the casing of the cooler is communicated with the casing of the heater through a plurality of communicating pipes; the working solution is arranged in the casing of the heater. Thus, a heat pipe cooling system is formed. The utility model enhances the pipe wall temperature of heavy oil in the heater, improves the state of increased oil viscosity and aggravated heat transfer which are caused by the low pipe wall temperature of the heavy oil, and consequently, achieves the improved heat transfer effect.

Description

A kind of heat exchange of heat pipe

The utility model relates to a kind of heat exchange of heat pipe.

At present, heavy oil is as a kind of more rudimentary energy, not only obtaining sizable use proportion, and also obtaining using widely in other industry (as: petrochemical system/metallurgical system heating furnace) with heavy oil combustion or in the power station of heavy oil as the igniting combustion supporting unit.

Coal-fired unit needs to drop into the heavy oil igniting when startup and underrun, when changing normal duty over to, fuel system must be in stand-by state, so that can drop at any time, guarantees the unit safety reliability service.And for the fuel oil unit, what require more is that fuel system remains running status, also must consider the burning economy except that guaranteeing safe and reliable operation.No matter but be as igniting combustion supporting or as main fuel, all need dispose the circulatory system that a cover can cool off oil return again fuel feeding for full-bodied fuel oil (heavy oil or residual oil).In order that guarantee that spray burning well reaches the unit safety economical operation, the general requirement is heated to 170 ℃ ~ 180 ℃ to fuel Heating; Oil return cooling is surpassed safe tolerance limit in order that the temperature when making oil return flow into oil depot is unlikely, and general the requirement is no more than 95 ℃, to guarantee to be unlikely the danger that meets accident.

Existing heavy oil cooler comprises housing and places the interior pipe family of housing, pipe family can be a various forms, can be arranged to the serpentine coil of connecting, also can be arranged to form in parallel, thereby form a kind of heavy oil cooler construction that heavy oil flows, cooling water flows in pipe in housing.As shown in Figure 1, its pipe family is arranged to form in parallel, and the two ends of housing 1 are contained the diffluence room 12 and the chamber 13 of confluxing respectively, some bodys 11 that housing 1 contains, its pipeline respectively with the diffluence room 12 and chamber 13 UNICOMs of confluxing.Heavy oil enters by the inlet of diffluence room 12, branch to some parallel pipelines after, the outlet from the chamber 13 of confluxing is flowed out.And cooling water enters from the top of housing 1 inlet, then by behind the outer wall of plurality of conduits, flows out from the outlet of housing below.Formed heat-exchange system like this.Because the thermal resistance from the tube wall to the cooling water is smaller, tube wall temperature is near water temperature, its main thermal resistance is in oily side, and higher oil runs into colder tube wall, and oily temperature promptly can reduce, because the high viscosity physical characteristic of heavy oil self, and the reduction of oil temperature impels oil viscosity further to increase, and it is extremely slow to cause flowing, and the state of cooling worsens, make heavy oil can not get cooling substantially in cooler, cooler lost efficacy substantially.Existing a kind of solution directly perceived is to improve cooling water inlet temperature, for the heavy oil that guarantees the exit reaches the temperature of regulation, not only needs to increase heat exchange area, and needs to increase cooling water inflow, implements very uneconomical like this.

The purpose of this utility model is to provide a kind of heat exchange of heat pipe, and it improves the tube wall temperature with oily side contacts, thereby improve heat-transfer effect under the situation that does not increase heat exchange area.

The purpose of this utility model is achieved in that a kind of heat exchange of heat pipe, and it comprises heater and cooler, and described cooler and heater comprise housing respectively and place the interior pipe family of housing that be characterized in: it also comprises some cross over pipes and working solution; Described cooler is positioned at the top of described heater, and the housing of cooler links by the housing of some cross over pipes and heater; And working solution places in the housing of described heater.

Above-mentioned heat exchange of heat pipe, wherein, pipe family is a kind of serpentine coil of series connection.

Above-mentioned heat exchange of heat pipe, wherein, a diffluence room and a chamber of confluxing is contained at the two ends of the two ends of cooler casing and heater housing respectively, pipe family is a parallel form, its pipeline respectively with the diffluence room and the chamber UNICOM of confluxing.

Owing to adopted above-mentioned technical solution, after the inlet of heavy oil by heater entered, heavy oil is by each tube wall heating work liquid of the pipe family of heater, boiling after working solution is heated, pour cooler with high speed by some cross over pipes, under the cooling water effect of flowing in the pipe family of cooler, steam is cooled to liquid again and flows back to heater by some cross over pipes under the gravity effect.Because the isothermal of heat pipe has improved the oil pipe wall temperature in the heater greatly, make when reducing the heavy oil outlet temperature like this, improved the situation of the low excessively oil viscosity increase heat transfer deterioration that causes of oil pipe wall temperature, improve heat-transfer effect thereby reach.

Below in conjunction with embodiment and accompanying drawing the utility model is further described.

Fig. 1 is the structural representation of existing heavy oil cooler;

Fig. 2 is a structural representation of the present utility model.

As shown in Figure 2, it is a kind of embodiment of the utility model, this heat exchange of heat pipe, and it comprises heater 2, cooler 3, some cross over pipes 4 and working solution 5.Cooler 3 and heater 2 comprise

housing

31,21 respectively, place the two ends of pipe family 11 in the housing and each housing to contain a diffluence room 23 (or 33) and a chamber 22 (or 32) of confluxing respectively, described cooler 3 is positioned at described heater 2 tops, the housing 31 of cooler links by the housing 21 of some cross over pipes 4 with heater, vacuumize in it, working solution 5 places in the housing 21 of described heater.Its pipe family is arranged to form in parallel, its pipeline respectively with its diffluence room and the chamber UNICOM of confluxing.

Pipe family also can be a kind of serpentine coil of series connection.

In sum, heavy oil is by heater tube wall heating work liquid, and boiling after working solution is heated is poured heat exchanger with high speed by cross over pipe, and under the effect of cooling water, steam is cooled to liquid again and flows back to heater by cross over pipe under the gravity effect.So, working solution is upper and lower automatically constantly to move in circles, continuous heat transferred cooling water with heavy oil.Thisly utilize Working fluid phase changing mechanism and the absorption of the latent heat of phase change of symbiosis and the heat transfer technology of release are called hot pipe technique thereupon.As long as it is functional that the operating temperature (saturation temperature) of control working solution can guarantee that heavy oil flows, make oil cooling but keep normal heat exchange situation.The temperature of working solution can be determined by the heat exchange area of heater, cooler and the flow of the coefficient of heat transfer and cooling medium easily.From structural representation and operation principle as can be seen the liquid-liquid type heat exchange of heat pipe have the dual-seal performance, even heater or heat exchanger leak, seepage or erosion are leaked, profit is still isolated, mix never mutually, guarantee that oil product and water quality are normal, be very suitable for the recycling of oil plant oil product low temperature exhaust heat.

Claims

1. heat exchange of heat pipe, it comprises heater and cooler, described cooler and heater comprise housing respectively and place pipe family in the housing, it is characterized in that:

It also comprises some cross over pipes and working solution;

Described cooler is positioned at the top of described heater, and the housing of cooler links by the housing of some cross over pipes and heater; And,

Working solution places in the housing of described heater.

2. a kind of heat exchange of heat pipe according to claim 1 is characterized in that, described pipe family is a kind of serpentine coil of series connection.

3. a kind of heat exchange of heat pipe according to claim 1, it is characterized in that, a diffluence room and one chamber of confluxing is contained at the two ends of the two ends of described cooler casing and heater housing respectively, and pipe family is a parallel form, its pipeline respectively with the diffluence room and the chamber UNICOM of confluxing.