CN214361474U

CN214361474U - Heat recovery device

Info

Publication number: CN214361474U
Application number: CN202120385451.7U
Authority: CN
Inventors: 徐以恬; 胡帆
Original assignee: Top Resource Conservation & Environment Corp
Current assignee: Top Resource Conservation & Environment Corp
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2021-10-08
Anticipated expiration: 2031-02-20

Abstract

The application provides a heat recovery device, which comprises a flash evaporator, a condensate pump and a heat exchanger, wherein a first output end of the flash evaporator is connected with a first input end of the heat exchanger, a first output end of the heat exchanger is connected with an input end of the condensate pump, the first input end of the heat exchanger is communicated with the first output end of the heat exchanger, the input end of the flash evaporator is used for connecting an output end of a blast furnace, and a second output end of the flash evaporator is used for connecting the input end of the blast furnace; the second input end of the heat exchanger is provided with a heating water inlet, the second output end of the heat exchanger is provided with a heating water outlet, and the second input end of the heat exchanger is communicated with the second output end of the heat exchanger. This application can reduce heat reclamation device's change frequency.

Description

Heat recovery device

Technical Field

The present application relates to the field of waste heat treatment technology, and more particularly, to a heat recovery device.

Background

In the production process of the steel industry, the temperature of the discharged steel slag is 1400-1500 ℃, a large amount of slag flushing water is needed for cooling the steel slag, the slag flushing water at 60-90 ℃ is finally obtained, and the slag flushing water is recycled after standing and cooling. The cinder flushing water has large water amount and high heat content, and the temperature is suitable for heating, so the cinder flushing water is used for heating, but the cinder flushing water has more impurities, and the replacement frequency of the heat recovery device is higher.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a heat recovery device to solve the problem that the frequency of replacement of the heat recovery device is high.

In a first aspect, an embodiment of the present application provides a heat recovery device, including a flash evaporator, a condensate pump, and a heat exchanger, where:

the first output end of the flash evaporator is connected with the first input end of the heat exchanger, the first output end of the heat exchanger is connected with the input end of the condensate pump, the first input end of the heat exchanger is communicated with the first output end of the heat exchanger, the input end of the flash evaporator is used for being connected with the output end of the blast furnace, and the second output end of the flash evaporator is used for being connected with the input end of the blast furnace;

the second input end of the heat exchanger is provided with a heating water inlet, the second output end of the heat exchanger is provided with a heating water outlet, and the second input end of the heat exchanger is communicated with the second output end of the heat exchanger.

Like this, in this application embodiment, through the flash vessel will the cinder flushing water that the blast furnace produced carries out the flash distillation to pass through the clean flash distillation vapour that produces the heat exchanger carries out the heat transfer as heat source and heating water, when realizing the heating to heating water, reduces the corruption to the heat exchanger, thereby the extension the live time of heat exchanger reduces heat recovery unit's change frequency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic view of a heat recovery device according to an embodiment of the present disclosure;

fig. 2 is a second schematic view of a heat recovery device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic diagram of a heat recovery apparatus according to an embodiment of the present application, as shown in fig. 1, including a flash evaporator 1, a condensate pump 2, and a heat exchanger 3, where:

the first output end of the flash evaporator 1 is connected with the first input end of the heat exchanger 3, the first output end of the heat exchanger 3 is connected with the input end of the condensate pump 2, the first input end of the heat exchanger 3 is communicated with the first output end of the heat exchanger 3, the input end of the flash evaporator 1 is used for connecting the output end of the blast furnace 4, and the second output end of the flash evaporator 1 is used for connecting the input end of the blast furnace 4;

the second input end of the heat exchanger 3 is provided with a heating water inlet, the second output end of the heat exchanger 3 is provided with a heating water outlet, and the second input end of the heat exchanger 3 is communicated with the second output end of the heat exchanger 3.

The amount of the flushing slag water output by the blast furnace 4 is large and the heat content is high, the flash evaporator 1 can carry out flash evaporation on the flushing slag water output by the blast furnace 4 to generate flash steam, the generated flash steam 1 is conveyed to the heat exchanger 3 through the first output end of the flash evaporator 1, the flushing slag water with the reduced temperature is conveyed to the blast furnace 4 through the second output end of the flash evaporator 1, and the residual cooling flushing slag water can return to the blast furnace 4 again to cool the steel slag for recycling.

The condensate pump 2 can pump out water formed by condensing steam serving as a heat source after heat exchange from the heat exchanger 3, so that the heat conduction efficiency of the heat exchanger is improved.

In the embodiment of this application, through flash vessel 1 will the cinder flushing water that blast furnace 4 produced carries out the flash distillation to pass through the clean flash distillation vapour that produces heat exchanger 3 carries out the heat transfer as heat source and heating water, when realizing the heating to heating water, reduces the corruption to heat exchanger 3, thereby the extension heat exchanger 3's live time reduces heat recovery unit's change frequency.

In addition, there is almost no extra device inside the flash evaporator 1, and the adhesion caused by the deposition of the original dissolved substance due to the decrease of the temperature of the flushing water can be reduced.

Optionally, as shown in fig. 1, the flash evaporator 1 includes a cylindrical portion and a conical portion, the cylindrical portion and the conical portion are communicated cavities, and a second output end of the flash evaporator 1 is disposed at a vertex of the conical portion.

Wherein, above-mentioned flash vessel 1 inside can be a confined space, and after the slag flushing water of input carries out the flash distillation, flash distillation steam can be exported in the heat exchanger and carry out the heat transfer as the heat source, and remaining slag flushing water has some solute to separate out because temperature drops and water partial evaporation as the solvent, through the design that above-mentioned flash vessel bottom is the cone, can promote solute and remaining slag flushing water to flow out from the cone bottom, reduce the attached of impurity at flash vessel 1 inner wall.

In this embodiment, the second output end of the flash evaporator 1 provided at the apex of the conical portion can reduce the retention of impurities in the slag flushing water in the flash evaporator 1, thereby improving the recovery efficiency of the slag flushing water.

Optionally, as shown in fig. 1, the first output end of the flash evaporator 1 is disposed on the bottom surface of the cylindrical portion opposite to the vertex of the conical portion.

In this embodiment, the flash steam generated in the flash evaporator 1 is in a vapor state, and is provided on a surface of the flash evaporator 1 opposite to the apex of the conical portion, that is, on the top of the flash evaporator 1, thereby reducing the presence of corrosive substances in the steam introduced as a heat source into the heat exchanger 3 and reducing corrosion and clogging of the heat exchanger 3.

Optionally, as shown in fig. 2, the apparatus further includes a vacuum pump 5, and a third output end of the flash evaporator 1 is connected to an input end of the vacuum pump 5.

In this embodiment, the vacuum pump 5 may reduce the pressure inside the flash evaporator 1 by pumping the gas in the flash evaporator 1, and may control the pressure inside the flash evaporator 1 to adjust the flash evaporation temperature of the slag water. In addition, the vacuum pump 5 is used for operating the flash evaporator 1 at negative pressure, so that extra pressure is not required to be provided for the flash evaporator 1 to overcome heat exchange resistance, and the self power consumption of the flash evaporator 1 is reduced.

Optionally, the flash evaporator 1 is an expansion flash evaporator.

In the embodiment, the flash evaporation is carried out on the slag flushing water output by the blast furnace by using the expansion flash evaporator, so that the flash evaporation effect of the flash evaporator can be improved, the corrosion to the heat exchanger is reduced, and the utilization rate of the slag flushing water is improved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A heat recovery device, comprising a flash evaporator, a condensate pump and a heat exchanger, wherein:

2. The heat recovery device of claim 1, wherein the flash evaporator comprises a cylindrical portion and a conical portion, the cylindrical portion and the conical portion being in communication with one another to define a cavity, the second output end of the flash evaporator being disposed at an apex of the conical portion.

3. The heat recovery device of claim 2, wherein the first output end of the flash evaporator is disposed at a bottom surface of the cylindrical portion opposite the apex of the conical portion.

4. The heat recovery device of claim 1, further comprising a vacuum pump, wherein the third output of the flash evaporator is connected to an input of the vacuum pump.

5. The heat recovery device of claim 1, wherein the flash vessel is an expansion flash vessel.