CN217209327U - Low-temperature corrosion prevention water supply system - Google Patents
Low-temperature corrosion prevention water supply system Download PDFInfo
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- CN217209327U CN217209327U CN202221230180.9U CN202221230180U CN217209327U CN 217209327 U CN217209327 U CN 217209327U CN 202221230180 U CN202221230180 U CN 202221230180U CN 217209327 U CN217209327 U CN 217209327U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model provides a prevent low temperature corrosion water supply system, include: the boiler barrel, the economizer of being connected with the boiler barrel, and connect between economizer and boiler barrel, be used for guaranteeing that the economizer is heated the water supply assembly that face pipe wall temperature is higher than flue gas dew point temperature, the water supply assembly includes: the system comprises a water supply mixing header, a water supply heater, an electric regulating valve and a temperature measuring instrument, wherein the water supply mixing header is connected with a water source and used for supplying water to the economizer, the water supply heater is connected with the water source and heated by a boiler barrel and used for supplying hot water to the water supply mixing header, the electric regulating valve is arranged between the water source and the water supply heater, and the temperature measuring instrument is used for measuring the temperature of the pipe wall of a heating surface of the economizer. The utility model discloses a prevent low temperature corrosion water supply system, through control boiler feedwater and hydrothermal proportional supply, can guarantee all the time that the economizer is heated the face pipe wall temperature and is higher than flue gas dew point temperature, avoid the low temperature corrosion phenomenon to take place, ensured boiler equipment's security and economic nature operation.
Description
Technical Field
The utility model relates to a boiler equipment technical field especially relates to a prevent low temperature corrosion water supply system.
Background
During the combustion process of boiler fuel, corrosive component flue gas such as HCl and SO is often generated 2 、SO 3 When the temperature of the metal wall of the tube wall of the heating surface of the economizer is lower than the dew point temperature of the flue gas, the tube wall of the economizer is easily corroded at low temperature, the tube explosion accident of the economizer is generated, and the service life of boiler equipment and the safe operation of a boiler are influenced.
The prior art mainly selects materials with strong corrosion resistance, such as ND steel, SA-789M S31803 stainless steel and the like as heat exchange tubes to relieve low-temperature corrosion, but from the view of actual construction and operation effects, the low-temperature corrosion still exists, the effect is poor, and the manufacturing cost is high.
Therefore, a technical scheme which has low manufacturing cost and can effectively avoid the low-temperature corrosion of the economizer with the heating surface at the tail part is urgently needed in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the background technology and providing a low-temperature corrosion prevention water supply system.
The utility model provides a technical scheme as follows: a low temperature corrosion resistant feedwater system comprising: the boiler barrel, the economizer of being connected with the boiler barrel, and connect between economizer and boiler barrel, be used for guaranteeing that the economizer is heated the water supply assembly that face pipe wall temperature is higher than flue gas dew point temperature, the water supply assembly includes: the system comprises a water supply mixing header, a water supply heater, an electric regulating valve and a temperature measuring instrument, wherein the water supply mixing header is connected with a water source and used for supplying water to the economizer, the water supply heater is connected with the water source and heated by a boiler barrel and used for supplying hot water to the water supply mixing header, the electric regulating valve is arranged between the water source and the water supply heater, and the temperature measuring instrument is used for measuring the temperature of the pipe wall of a heating surface of the economizer.
Furthermore, the water supply mixing header is communicated with the economizer through a first pipeline, the water supply mixing header is communicated with a water pump through a second pipeline and a third pipeline, and the water pump is communicated with a water source.
Furthermore, the joint of the second pipeline and the third pipeline is communicated with a fourth pipeline through a joint, the other end of the fourth pipeline is communicated with a water inlet of the water supply heater, a water outlet of the water supply heater is communicated with a water supply mixing header through a fifth pipeline, and the electric regulating valve is connected to the fourth pipeline.
Further, a feedwater heater is disposed in the steam space of the drum, the feedwater heater comprising: the inlet header is communicated with the fourth pipeline, the plurality of groups of coiled pipes are communicated with the inlet header and used for exchanging steam-water heat with saturated steam in the boiler barrel, and the outlet header is connected between the outlet of the coiled pipes and the inlet of the fifth pipeline.
Furthermore, the pipe diameter of the coiled pipe is phi 32 mm-phi 60 mm.
Further, the method also comprises the following steps: the boiler flue, the economizer set up in the boiler flue, and boiler flue bottom sets up the export flue.
Furthermore, the temperature measuring instrument is connected in the outlet flue.
Further, the economizer is communicated with the boiler barrel through a sixth pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a water supply system, through control boiler feed water and hydrothermal proportional supply, can guarantee all the time that the economizer is heated the face pipe wall temperature and is higher than flue gas dew point temperature, avoids the low temperature corrosion phenomenon to take place, has ensured boiler equipment's security and economic nature operation.
(2) The utility model discloses a water supply system through arranging feedwater heater in the steam space of boiler barrel, can effectively solve heater pipe water discharging unclean, the heat exchange tube scheduling problem that corrodes easily.
(3) The utility model discloses a water supply system is phi 32mm ~ phi 60mm through arranging the pipe diameter, and is the coiled pipe of fluorescent tube structure, reaches the stable technological effect who improves feedwater temperature 10 ~ 20 ℃ fast, and simple structure, processing and convenient assembling, and the heat storage capacity is strong.
Drawings
FIG. 1 is a schematic view of the overall structure of the water supply system of the present invention;
FIG. 2 is a front view of the feedwater heater of the present invention;
figure 3 is a side view of the feedwater heater of the present invention.
The reference numbers are as follows: 1. the system comprises an economizer, 2, a boiler barrel, 3, a feed water heater, 4, a boiler flue, 5, an outlet flue, 6, a first pipeline, 7, a second pipeline, 8, a third pipeline, 9, a feed water mixing header, 10, a water pump, 11, a fourth pipeline, 12, a fifth pipeline, 13, an electric regulating valve, 14, a temperature measuring instrument, 15, a sixth pipeline, 16, a coiled pipe, 17, an inlet header, 18 and an outlet header.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1-3, the utility model relates to a low temperature corrosion prevention water supply system, which comprises: boiler barrel 2, the economizer 1 of being connected with boiler barrel 2, and connect between economizer 1 and boiler barrel 2, be used for guaranteeing that economizer 1 is heated the water supply subassembly that the face pipe wall temperature is higher than flue gas dew point temperature, the water supply subassembly includes: the system comprises a water supply mixing header 9 which is connected with a water source and used for supplying water to the economizer 1, a water supply heater 3 which is connected with the water source, heated by a boiler barrel 2 and used for supplying hot water to the water supply mixing header 9, an electric regulating valve 13 arranged between the water source and the water supply heater 3, and a temperature measuring instrument 14 used for measuring the temperature of the pipe wall of the heating surface of the economizer 1.
The economizer 1 of the present embodiment is disposed in the boiler flue 4.
The economizer 1 of the present embodiment functions as follows: the water inlet temperature of the boiler barrel 2 is increased, the coal economizer 1 is arranged in the boiler flue 4, when the flue gas at the tail of the boiler passes through the boiler flue 4, the coal economizer 1 is washed, the boiler feed water absorbs the heat in the flue gas through the coal economizer 1, and the temperature of the boiler feed water is increased.
The water source of this embodiment is boiler feed water.
The hot water heated by the feed water heater 3 of the embodiment flows into the feed water mixing header 9 to be mixed with the boiler feed water of the water source, so that the temperature of the wall of the heating surface pipe of the economizer 1 is higher than the dew point temperature of the flue gas.
The feed water heater 3 of the embodiment is arranged in the steam space of the boiler barrel 2, and the boiler in the feed water heater 3 is fed with water and heated by the steam of the boiler barrel 2, so that the problems of incomplete water discharge of a heater pipe, easy corrosion of a heat exchange pipe and the like can be effectively solved.
The electric control valve 13 of the present embodiment is connected between the water source and the feedwater heater 3 for controlling the amount of feedwater supplied to the feedwater heater 3.
Specifically, when the temperature measuring instrument 14 displays that the temperature is lower than the critical alarm value of the acid dew point, the opening of the electric regulating valve 13 is adjusted, a water source is introduced into the feed water heater 3, is heated by saturated steam in the boiler barrel 2 and then is led out to the feed water mixing header 9, meanwhile, the water source supplies water to the feed water mixing header 9, the water heated by the feed water heater 3 is fully mixed with boiler feed water, then enters the economizer 1 for heating, and finally enters the boiler barrel 2; the proportional supply of the heating water amount is controlled by the electric regulating valve 13, so that the temperature of the wall of the heating surface pipe of the economizer 1 is always higher than the dew point temperature of the flue gas, the low-temperature corrosion phenomenon is avoided, and the safety and economical operation of boiler equipment are ensured.
Further, a water supply mixing header 9 is communicated with the economizer 1 through a first pipeline 6, the water supply mixing header 9 is communicated with a water pump 10 through a second pipeline 7 and a third pipeline 8, and the water pump 10 is communicated with a water source.
The water pump 10 of this embodiment is used to transfer water from a source into the feed water mixing header 9.
Furthermore, a fourth pipeline 11 is communicated with the joint of the second pipeline 7 and the third pipeline 8 through a joint, the other end of the fourth pipeline 11 is communicated with a water inlet of the feed water heater 3, a water outlet of the feed water heater 3 is communicated with a feed water mixing header 9 through a fifth pipeline 12, and an electric regulating valve 13 is connected to the fourth pipeline 11.
The water source of the embodiment is supplied to the feed water heater 3 through the fourth pipeline 11 and is supplied to the feed water mixing header 9 through the second pipeline 7, and when the opening degree is controlled by the electric control valve 13, the control of the feed water ratio of the fourth pipeline 11 and the second pipeline 7 is realized.
Specifically, when the opening of the electric control valve 13 is smaller, the amount of water heated by the water supply heater 3 is small, the amount of boiler water supplied to the water supply mixing header 9 is large, and the temperature of the water is slowly increased; when the opening of the electric control valve 13 is large, the amount of water heated by the water heater 3 is large, the amount of boiler feed water supplied to the feed water mixing header 9 is small, and the ratio of the amount of heated water to the amount of boiler feed water is large, so that the amount of hot water produced is correspondingly increased, and the temperature of water rises quickly.
Further, the feedwater heater 3 includes: an inlet header 17 communicated with the fourth pipeline 11, a plurality of groups of serpentine pipes 16 communicated with the inlet header 17 and used for performing steam-water heat exchange with saturated steam in the drum 2, and an outlet header 18 connected between the outlet of the serpentine pipes 16 and the inlet of the fifth pipeline 12.
Preferably, the diameter of the coiled pipe 16 is phi 32 mm-phi 60mm, and the coiled pipe is of a light pipe structure, so that the technical effect of stably and rapidly increasing the water supply temperature by 10-20 ℃ is achieved, and the coiled pipe is simple in structure, convenient to process and assemble and strong in heat storage capacity.
Specifically, feed water enters the coiled pipe 16 through the inlet header 17, and is subjected to steam-water heat exchange with saturated steam in the drum 2 by using the coiled pipe 16 as a heat exchange surface, and then is led out from the outlet header 18.
Further, an outlet flue 5 is arranged at the bottom of the boiler flue 4.
Further, a temperature measuring instrument 14 is connected in the outlet flue 5.
Further, the economizer 1 is communicated with the drum 2 through a sixth pipeline 15.
The working principle is as follows:
when the temperature measuring instrument 14 displays that the temperature is lower than the critical alarm value of the acid dew point, the water supply assembly works to improve the water supply temperature, so that the temperature of the metal wall of the pipe wall of the heating surface of the economizer 1 is higher than the temperature of the flue gas dew point, and the low-temperature corrosion phenomenon is avoided:
the opening degree of an electric adjusting valve 13 is adjusted, a part of feed water is introduced into a feed water heater 3 through a fourth pipeline 11 by a feed water pump 10 and a third pipeline 8, the feed water is heated by saturated steam in a boiler barrel 2 and then is led out to a feed water mixing header 9 through a fifth pipeline 12, boiler feed water of most of other water sources enters the feed water mixing header 9 through a second pipeline 7 to be fully mixed, then enters an economizer 1 through a first pipeline 6 to be heated, and finally enters the boiler barrel 2 through a sixth pipeline 15.
When the temperature measuring instrument 14 displays that the temperature is far higher than the critical alarm value of the acid dew point, the feed water heater 3 stops working, the temperature of the metal wall of the heating surface pipe wall of the economizer 1 is ensured to be higher than the temperature of the flue gas dew point, and the low-temperature corrosion phenomenon is avoided:
and closing the electric regulating valve 13, leading all the water supply to the water supply mixing header 9 through the water supply pump 10, the third pipeline 8 and the second pipeline 7, then entering the economizer 1 through the first pipeline 6 for heating, and finally entering the boiler barrel 2 through the sixth pipeline 15.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Furthermore, the above definitions of the various elements and methods are not limited to the specific structures, shapes, or configurations shown in the examples.
It is also noted that the illustrations herein may provide examples of parameters that include particular values, but that these parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error tolerances or design constraints. Directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer to the direction of the drawings, and are not intended to limit the scope of the present application.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. A low temperature corrosion resistant feedwater system comprising: boiler barrel (2), with economizer (1) that boiler barrel (2) are connected, and connect economizer (1) with between boiler barrel (2), be used for guaranteeing that economizer (1) is heated the water supply subassembly that face pipe wall temperature is higher than flue gas dew point temperature, its characterized in that, the water supply subassembly includes: the system comprises a water supply mixing header (9) which is connected with a water source and used for supplying water to the economizer (1), a water supply heater (3) which is connected with the water source, is heated by the boiler barrel (2) and is used for supplying hot water to the water supply mixing header (9), an electric regulating valve (13) which is arranged between the water source and the water supply heater (3), and a temperature measuring instrument (14) which is used for measuring the temperature of the pipe wall of the heating surface of the economizer (1).
2. The low-temperature corrosion prevention water supply system as claimed in claim 1, wherein the water supply mixing header tank (9) is communicated with the economizer (1) through a first pipeline (6), the water supply mixing header tank (9) is communicated with a water pump (10) through a second pipeline (7) and a third pipeline (8), and the water pump (10) is communicated with a water source.
3. The low-temperature corrosion prevention water supply system as claimed in claim 2, wherein a fourth pipeline (11) is communicated with the joint of the second pipeline (7) and the third pipeline (8) through a joint, the other end of the fourth pipeline (11) is communicated with the water inlet of the water supply heater (3), the water outlet of the water supply heater (3) is communicated with the water supply mixing header (9) through a fifth pipeline (12), and the electric control valve (13) is connected to the fourth pipeline (11).
4. A low temperature corrosion prevention feedwater system as claimed in claim 3 wherein said feedwater heater (3) is disposed in the steam space of said drum (2), said feedwater heater (3) comprising: the boiler comprises an inlet header (17) communicated with a fourth pipeline (11), a plurality of groups of coiled pipes (16) communicated with the inlet header (17) and used for performing steam-water heat exchange with saturated steam in the boiler barrel (2), and an outlet header (18) connected between the outlet of the coiled pipes (16) and the inlet of the fifth pipeline (12).
5. The low temperature corrosion prevention water supply system as claimed in claim 4, wherein the diameter of the serpentine pipe (16) is Φ 32mm to Φ 60 mm.
6. The cryogenic corrosion prevention water supply system of claim 1 further comprising: the coal economizer is characterized by comprising a boiler flue (4), wherein the coal economizer (1) is arranged in the boiler flue (4), and an outlet flue (5) is arranged at the bottom of the boiler flue (4).
7. A cryogenic corrosion protection water supply system according to claim 6, characterized in that the temperature measuring instrument (14) is connected in the outlet flue (5).
8. The cryogenic corrosion prevention water supply system as claimed in claim 1, characterized in that the economizer (1) communicates with the drum (2) through a sixth conduit (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221230180.9U CN217209327U (en) | 2022-05-23 | 2022-05-23 | Low-temperature corrosion prevention water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221230180.9U CN217209327U (en) | 2022-05-23 | 2022-05-23 | Low-temperature corrosion prevention water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217209327U true CN217209327U (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221230180.9U Active CN217209327U (en) | 2022-05-23 | 2022-05-23 | Low-temperature corrosion prevention water supply system |
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| Country | Link |
|---|---|
| CN (1) | CN217209327U (en) |
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2022
- 2022-05-23 CN CN202221230180.9U patent/CN217209327U/en active Active
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