CN215259769U

CN215259769U - Flue gas deep cooler

Info

Publication number: CN215259769U
Application number: CN202121529240.2U
Authority: CN
Inventors: 朱清云; 刘钦; 张兆磊; 谌玉良
Original assignee: Jinan Tairuicheng Thermal Power Engineering Co ltd
Current assignee: Jinan Tairuicheng Thermal Power Engineering Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-12-21
Anticipated expiration: 2031-07-05

Abstract

The utility model relates to a flue gas degree of depth cooler, which comprises a housin, the both ends that the casing is relative are provided with export collection case and import collection case respectively, be equipped with middle collection case between export collection case and the import collection case, be equipped with the heat exchange tube between export collection case and the middle collection case, import collection case and middle collection case also are equipped with the heat exchange tube. Can discharge fume to the boiler and carry out the degree of depth cooling to the condensate water of heating power plant, through heating the condensate water, improve boiler feed water temperature, reduce boiler exhaust gas temperature, improve boiler efficiency, arrange flue gas degree of depth cooler between dust remover and desulfurizing tower, can reduce desulfurizing tower import flue gas temperature, reduce the desulfurizing tower water consumption, improve desulfurization efficiency, realize the purpose of energy-conserving increase, water economy resource.

Description

Flue gas deep cooler

Technical Field

The utility model belongs to the technical field of energy-concerving and environment-protective, concretely relates to flue gas deep cooling ware.

Background

The waste heat is an energy resource which is generated by fuel combustion and various heat energy heat exchange equipment, energy utilization equipment and chemical reaction equipment and is not utilized completely in the production process of industries and enterprises. For thermal power plants, the flue gas heat loss is the largest of the various heat losses of the boiler, typically between 5% and 8%, accounting for 80% or more of the total heat loss of the boiler. The main factor influencing the heat loss of the exhaust smoke is the temperature of the exhaust smoke of the boiler, and generally, the heat loss of the exhaust smoke is increased by 0.6 to 1 percent when the temperature of the exhaust smoke is increased by 10 ℃. The actual operation value of the exhaust gas temperature of many power station boilers in China is about 20-50 ℃ higher than the design value, and the economical efficiency of the power station boilers can be greatly improved by greatly reducing the exhaust gas temperature.

Therefore, the design of the deep flue gas cooler which can effectively utilize the waste heat of the flue gas and reduce the exhaust gas temperature of the boiler so as to improve the economic benefit of the power station boiler has important significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above-mentioned prior art, provide a flue gas deep cooling ware, which comprises a housin, the both ends that the casing is relative are provided with export collection case and import collection case respectively, be equipped with middle collection case between export collection case and the import collection case, be equipped with the heat exchange tube between export collection case and the middle collection case, also be equipped with the heat exchange tube between import collection case and the middle collection case.

In a typical embodiment, a flue gas inlet is provided adjacent the top end of the outlet header housing and a flue gas outlet is provided adjacent the bottom end of the inlet header housing such that an airflow path is provided between the flue gas inlet and the flue gas outlet within the housing.

In a typical embodiment, the heat exchange tube is a threaded tube type heat exchanger, and has the advantages of compact structure, large heat transfer area, small temperature difference stress and excellent heat transfer effect.

In a typical implementation mode, the bottom of the heat exchange tube is provided with the support frame, so that the positioning is accurate, the installation is convenient, and the support effect is good.

In a typical implementation mode, the backplate is all connected at middle header both ends, both ends backplate all is connected with the heat exchange tube, two sets of heat exchange tubes and middle header intercommunication structure about forming, and the backplate is used for protecting the first fin of heat exchange tube not receive external force damage, plays the effect that increases cooler intensity simultaneously, can also play the effect of fixed cooler mounting structure.

In a typical embodiment, the protection plate is provided with an insulating layer, so that the internal heat dissipation rate can be further reduced, and the protection plate can have an efficient insulating effect. Preferably, the heat-insulating layer is a heat-insulating sponge layer.

In a typical embodiment, the outlet header and the inlet header are connected in a loop with a circulation pump and a feed water heater, and the circulation pump is positioned on one side close to the outlet header.

In a typical embodiment, the side of the feedwater heater pipe away from the circulation pump is connected to the external power plant condensate, and preferably, the pipe is further provided with a regulating valve for regulating the flow rate.

The utility model discloses a following technological effect has been obtained at least to one or more specific embodiment:

(1) flue gas deep cooling ware aim at discharges fume to the boiler and carries out the degree of depth cooling to the condensate water of heating power plant, through heating the condensate water, improves boiler feed water temperature, reduces boiler exhaust gas temperature, improves boiler efficiency, arranges flue gas deep cooling ware between dust remover and desulfurizing tower, can reduce desulfurizing tower import flue gas temperature, reduce the desulfurizing tower water consumption, improves desulfurization efficiency, realizes energy-conserving increase, the purpose of water economy resource.

(2) The utility model discloses the heating surface adopts the enamel layer, can effectively prevent acid dew point corrosion, low cost.

(3) The utility model discloses have independent operating system, even break down the phenomenon of stopping the operation, can not influence the normal use of unit yet, guaranteed the long period safe operation of unit.

(4) The utility model discloses the middle header that sets up provides a collection place for the coolant circulating water that gets into through the import header, makes its temperature distribution even, is favorable to heat transfer process on next step.

(5) The utility model discloses a modular design mode can arrange multiunit flue gas deep cooling ware, simple to operate, easy operation, efficient in proper order on the flue.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic structural view of a flue gas deep cooler in embodiment 1 of the present invention;

fig. 2 is a process flow chart of deep recycling of flue gas waste heat in embodiment 2 of the present invention.

The system comprises a flue gas inlet 1, a flue gas inlet 2, an outlet header 3, a support frame 4, a protective plate, a heat insulation layer 5, a middle header 6, an inlet header 7, a flue gas outlet 8, a circulating pump 9, a feed water heater 10, external power plant condensate water 11 and a regulating valve.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Example 1

As shown in fig. 1, a deep flue gas cooler comprises a housing, wherein an outlet header 2 and an inlet header 6 are respectively arranged at two opposite ends of the housing, a middle header 5 is arranged between the outlet header 2 and the inlet header 6, a threaded tubular heat exchanger is arranged between the outlet header 2 and the middle header 5, and the inlet header 6 and the middle header 5 are also provided with threaded tubular heat exchangers, so that the deep flue gas cooler is compact in structure, large in heat transfer area, small in temperature difference stress and excellent in heat transfer effect; the bottom of the heat exchange tube is provided with the support frame 3, so that the positioning is accurate, the installation is convenient, and the support effect is good. The top end of the shell body close to the outlet header 2 is provided with a smoke inlet 1, and the bottom end of the shell body close to the inlet header 6 is provided with a smoke outlet 7, so that an airflow passage is formed between the smoke inlet 1 and the smoke outlet 7 in the shell body. The backplate is all connected at 5 both ends in middle collection case, both ends backplate all is connected with the heat exchange tube, and the backplate is used for protecting first heat exchange tube not receive external force to damage, plays the effect that increases cooler intensity simultaneously, can also play the effect of fixed cooler mounting structure. The protection plate is provided with a heat preservation sponge layer, so that the internal heat dissipation rate can be further reduced, and the protection plate has an efficient heat preservation effect.

Example 2

As shown in fig. 2, a circulation pump 8 and a feedwater heater 9 are arranged on a loop connecting the outlet header 2 and the inlet header 6 of the flue gas deep cooler in embodiment 1, and the circulation pump 8 is located at a side close to the outlet header 2. And one side of the feed water heater 9, which is far away from the circulating pump, is connected with external power plant condensed water 10, and a regulating valve 11 is further arranged on the pipeline and used for regulating the flow.

The working principle is as follows: when the flue gas deep cooler works, flue gas enters the cooler through the flue gas inlet, and flows back to the flue through the heat exchange outlet after heat exchange. The cooling medium circulating water enters the inlet header 6, is distributed to enter the heat exchange tubes through the inlet header 6, then enters the next group of heat exchange tubes after being collected in the middle header 5, and finally flows out through the outlet header 2 after heat exchange. The flue gas flows outside the heat exchange pipe and is cooled by the cooling medium in the pipe. After heat exchange is completed, circulating water flowing out of the outlet header 2 flows into the water supply heater 9, and external power plant condensed water 10 enters the water supply heater 9 to be heated, so that the water supply temperature of the boiler is increased, the smoke exhaust temperature of the boiler is reduced, and the efficiency of the boiler is improved. The temperature of the circulating water after being contacted with the condensed water is reduced, and the circulating water can further enter the inlet header to realize the circulating process.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a flue gas deep cooling ware which characterized in that, includes the casing, the both ends that the casing is relative are provided with export collection case and import collection case respectively, be equipped with middle collection case between export collection case and the import collection case, be equipped with the heat exchange tube between export collection case and the middle collection case, import collection case and middle collection case also are equipped with the heat exchange tube.

2. The deep flue gas cooler of claim 1, wherein a flue gas inlet is provided adjacent the top end of the outlet header housing and a flue gas outlet is provided adjacent the bottom end of the inlet header housing, such that a gas flow path is provided between the flue gas inlet and the flue gas outlet within the housing.

3. The deep flue gas cooler of claim 1, wherein the heat exchange tubes are threaded tube heat exchangers.

4. The deep flue gas cooler of claim 1, wherein the bottom of the heat exchange tube is provided with a support frame.

5. The deep flue gas cooler of claim 1, wherein the middle header is connected at both ends with guard plates, and the guard plates at both ends are connected with heat exchange tubes.

6. The deep flue gas cooler of claim 5, wherein the shield is provided with an insulating layer.

7. The deep flue gas cooler of claim 6, wherein the insulating layer is a heat insulating sponge layer.

8. The deep flue gas cooler of claim 6, wherein a circulation pump and a feed water heater are arranged on a loop connecting the outlet header and the inlet header, and the circulation pump is positioned on one side close to the outlet header.

9. The deep flue gas cooler of claim 8, wherein the side of the feedwater heater conduit remote from the circulating pump is connected to external power plant condensate.

10. The deep flue gas cooler of claim 9, further comprising a regulating valve disposed on the conduit.