CN222703286U - Low-temperature economizer system capable of eliminating ammonia bisulfate deposition - Google Patents
Low-temperature economizer system capable of eliminating ammonia bisulfate deposition Download PDFInfo
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- CN222703286U CN222703286U CN202421323828.6U CN202421323828U CN222703286U CN 222703286 U CN222703286 U CN 222703286U CN 202421323828 U CN202421323828 U CN 202421323828U CN 222703286 U CN222703286 U CN 222703286U
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Abstract
本实用新型公开了一种可消除硫酸氢氨沉积的低温省煤器系统，包括低温省煤器、热媒水进口、热媒水出口、热媒水进口阀门、热媒水出口阀门、蒸汽进口、蒸汽进口阀门、若干排水口、若干排水阀门、若干排气口、若干排气阀门和清灰装置，所述低温省煤器的前集箱设有与其连通的热媒水出口、蒸汽进口、排水口和排气口，所述低温省煤器的后集箱设有与其连通的排气口、热媒水进口和排水口，与现有技术相比，能够在不停机的情况下对低温省煤器设备进行清灰工作，提高低温省煤器设备运行的换热效率，减少因低温省煤器积灰后烟气阻力变大产生的能耗增加问题，减少低温省煤器积灰后换热元件产生低温腐蚀问题。
The utility model discloses a low-temperature economizer system capable of eliminating ammonium bisulfate deposition, comprising a low-temperature economizer, a heat medium water inlet, a heat medium water outlet, a heat medium water inlet valve, a heat medium water outlet valve, a steam inlet, a steam inlet valve, a plurality of drains, a plurality of drain valves, a plurality of exhaust ports, a plurality of exhaust valves and a dust cleaning device, wherein a front header of the low-temperature economizer is provided with a heat medium water outlet, a steam inlet, a drain and an exhaust port connected thereto, and a rear header of the low-temperature economizer is provided with an exhaust port, a heat medium water inlet and a drain port connected thereto. Compared with the prior art, the low-temperature economizer equipment can be dust cleaned without stopping the machine, thereby improving the heat exchange efficiency of the low-temperature economizer equipment, reducing the problem of increased energy consumption caused by increased smoke resistance after dust accumulation in the low-temperature economizer, and reducing the problem of low-temperature corrosion of heat exchange elements caused by dust accumulation in the low-temperature economizer.
Description
[ Field of technology ]
The utility model relates to the technical field of low-temperature economizers, in particular to a low-temperature economizer system capable of eliminating ammonia bisulfate deposition.
[ Background Art ]
The low-temperature economizer system is a waste heat recycling system, and is mainly arranged in front of an electric dust collector behind the air preheater and is matched with a heat medium water auxiliary heater, a circulating water pump, a water supplementing system, an ash removing device and other auxiliary systems. The heat transfer medium is desalted water, the whole system is filled with heat medium water to be heated, a heat medium water circulating pump is started, the heat medium water is boosted by the circulating pump and then enters the low-temperature economizer to recover flue gas waste heat, the heated desalted water heats desulfurized low-temperature flue gas or boiler cold primary air and secondary air through a pipeline, and the cooled desalted water is returned to an inlet of the heat medium water circulating pump.
Flue gas after the boiler passes through the SCR system and the air preheater and then reaches the low-temperature economizer. At present, a plurality of units of SCR systems have the problem that ammonia escapes seriously, the temperature of the flue gas is reduced to below 150 ℃ after passing through an air preheater, and ammonia bisulfate in the flue gas is converted into liquid state, so that the flue gas is easy to mix with fly ash and adhere to a heat exchange element when flowing through low-temperature economizer equipment. At this time, the soot blower equipped with the traditional ash removal device cannot effectively remove sticky accumulated ash, and as time goes by, the accumulated ash is more and more, so that the resistance of the low-temperature economizer equipment is increased, and the heat exchange effect is weakened.
[ utility model ]
The utility model aims to solve the problems in the prior art, and provides a low-temperature economizer system capable of eliminating ammonia bisulfate deposition, which can carry out ash removal on low-temperature economizer equipment under the condition of no shutdown, improve the heat exchange efficiency of the operation of the low-temperature economizer equipment, reduce the problem of energy consumption increase caused by the increase of smoke resistance after ash deposition of the low-temperature economizer, and reduce the problem of low-temperature corrosion of a heat exchange element after ash deposition of the low-temperature economizer.
In order to achieve the above purpose, the utility model provides a low-temperature economizer system capable of eliminating ammonia bisulfate deposition, which comprises a low-temperature economizer, a heating medium water inlet, a heating medium water outlet, a heating medium water inlet valve, a heating medium water outlet valve, a steam inlet valve, a plurality of water outlets, a plurality of water drainage valves, a plurality of air outlets, a plurality of air exhaust valves and an ash removal device, wherein a front header of the low-temperature economizer is provided with the heating medium water outlet, the steam inlet, the water outlets and the air outlets which are communicated with each other, a rear header of the low-temperature economizer is provided with the air outlets, the heating medium water inlet and the water outlets which are respectively provided with the heating medium water outlet valve, the steam inlet valve, the water drainage valve, the air exhaust valve and the heating medium water inlet valve, and the ash removal device is arranged on the upper side of the low-temperature economizer and used for cleaning heat exchange elements of the low-temperature economizer.
Preferably, the ash removal device comprises a plurality of soot blowers, and the soot blowers are communicated with a compressed air or steam supply pipe.
Preferably, the lower ends of the front header and the rear header of the low-temperature economizer are respectively provided with a water outlet.
Preferably, the upper ends of the front header and the rear header of the low-temperature economizer are respectively provided with an exhaust port.
Preferably, the heating medium water outlet and the steam inlet are positioned between the water outlet and the air outlet, and the heating medium water outlet is positioned above the steam inlet.
The utility model has the beneficial effects that 1, ash removal work can be carried out on the low-temperature economizer equipment under the condition of no shutdown, 2, the existing equipment can be modified, the on-line modification is realized, the modification cost is low, the construction period is short, 3, the heat exchange efficiency of the operation of the low-temperature economizer equipment can be improved, 4, the problem of energy consumption increase caused by the increase of smoke resistance after ash deposition of the low-temperature economizer can be reduced, and 5, the problem of low-temperature corrosion of a heat exchange element after ash deposition of the low-temperature economizer can be reduced.
The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.
[ Description of the drawings ]
FIG. 1 is a schematic diagram of a low-temperature economizer system for eliminating ammonia bisulfate deposits according to the present utility model.
In the figure, a 1-low-temperature economizer, a 2-heat medium water inlet, a 3-heat medium water outlet, a 4-heat medium water inlet valve, a 5-heat medium water outlet valve, a 6-steam inlet, a 7-steam inlet valve, an 8-water outlet, a 9-water discharge valve, a 10-exhaust port, an 11-exhaust valve, a 12-ash removal device and a 121-ash blower are arranged.
[ Detailed description ] of the invention
Referring to fig. 1, the low-temperature economizer system capable of eliminating ammonia bisulfate deposition comprises a low-temperature economizer 1, a heat medium water inlet 2, a heat medium water outlet 3, a heat medium water inlet valve 4, a heat medium water outlet valve 5, a steam inlet 6, a steam inlet valve 7, a plurality of water outlet ports 8, a plurality of water outlet valves 9, a plurality of air outlet ports 10, a plurality of air outlet valves 11 and an ash removal device 12, wherein a front header of the low-temperature economizer 1 is provided with the heat medium water outlet 3, the steam inlet 6, the water outlet ports 8 and the air outlet ports 10 which are communicated with the front header, a rear header of the low-temperature economizer 1 is provided with the air outlet 10, the heat medium water inlet 2 and the water outlet ports 8 which are communicated with the rear header, and the heat medium water outlet 3, the steam inlet 6, the water outlet ports 8, the air outlet ports 10 and the heat medium water inlet valve 2 are respectively provided with the heat medium water outlet valve 5, the steam inlet valve 7, the water outlet valve 9, the air outlet valve 11 and the heat medium water inlet valve 4, and the ash removal device 12 is arranged on the upper side of the low-temperature economizer 1 for cleaning heat exchange elements of the low-temperature economizer 1.
The ash removal device 12 comprises a plurality of soot blowers 121, and the soot blowers 121 are communicated with a compressed air or steam supply pipe.
The lower ends of the front header and the rear header of the low-temperature economizer 1 are respectively provided with a water outlet 8.
The upper ends of the front header and the rear header of the low-temperature economizer 1 are respectively provided with an exhaust port 10.
The heating medium water outlet 3 and the steam inlet 6 are positioned between the water outlet 8 and the exhaust port 10, and the heating medium water outlet 3 is positioned above the steam inlet 6.
The working process of the utility model comprises the following steps:
In the working process of the low-temperature economizer system capable of eliminating the deposition of the ammonia bisulfate, when the ash deposition of the low-temperature economizer is serious and the equipment resistance is increased, the heat medium water inlet valve 4 and the heat medium water outlet valve 5 are closed, the steam inlet valve 7 connected with the low-temperature economizer is opened, then the drain valve 9 is opened, the drain valve 9 is slowly closed until distilled water is reserved after the steam comes out of the drain valve 9, when the temperature of a heat exchange element rises above the critical value of the phase change of the ammonia bisulfate, the ash removal device is started, the flue gas differential pressure condition of the low-temperature economizer is observed, and the flue gas differential pressure of the low-temperature economizer is monitored by the differential pressure sensor. After the flue gas differential pressure is recovered to a normal value, the ash removal device is closed, the steam inlet valve 7 is closed, the water discharge valve 9 is thoroughly closed, the exhaust valve 11 is opened, the heating medium water inlet valve 4 and the heating medium water outlet valve 5 are opened, when the exhaust valve 11 starts to flow out of water, the exhaust valve 11 is closed, and the low-temperature economizer is recovered to normal operation.
The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.
Claims (5)
1. The low-temperature economizer system capable of eliminating the deposition of the ammonia bisulfate is characterized by comprising a low-temperature economizer (1), a heating medium water inlet (2), a heating medium water outlet (3), a heating medium water inlet valve (4), a heating medium water outlet valve (5), a steam inlet (6), a steam inlet valve (7), a plurality of water outlets (8), a plurality of water draining valves (9), a plurality of air draining valves (10), a plurality of air draining valves (11) and an ash removing device (12), wherein a front header of the low-temperature economizer (1) is provided with the heating medium water outlet (3), the steam inlet (6), the water draining valves (8) and the air draining valves (10) which are communicated with the front header, a rear header of the low-temperature economizer (1) is provided with the air draining valves (10), the heating medium water inlet (2) and the water draining valves (8) which are communicated with the rear header, and the heating medium water outlet valve (3), the steam inlet valve (6), the water draining valves (9), the air draining valves (11) and the water draining valves (12) are respectively arranged on the heating medium water outlet valve (5), the steam inlet valve (7), the water draining valves (9) and the air draining valves (4) which are arranged on the low-temperature economizer (1) and the heat-level heat-exchanging element.
2. A low-temperature economizer system for eliminating ammonia bisulfate deposits according to claim 1 wherein the ash removal device (12) comprises a plurality of soot blowers (121), the soot blowers (121) being in communication with a compressed air or steam supply.
3. The low-temperature economizer system capable of eliminating ammonia bisulfate deposition according to claim 1, wherein the lower ends of the front header and the rear header of the low-temperature economizer (1) are respectively provided with a water outlet (8).
4. The low-temperature economizer system capable of eliminating ammonia bisulfate deposition as claimed in claim 1, wherein the upper ends of the front header and the rear header of the low-temperature economizer (1) are respectively provided with an exhaust port (10).
5. A low-temperature economizer system as claimed in any one of claims 1 to 4, characterized in that said heating medium water outlet (3) and steam inlet (6) are located between the drain opening (8) and the exhaust opening (10), said heating medium water outlet (3) being located above the steam inlet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421323828.6U CN222703286U (en) | 2024-06-12 | 2024-06-12 | Low-temperature economizer system capable of eliminating ammonia bisulfate deposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421323828.6U CN222703286U (en) | 2024-06-12 | 2024-06-12 | Low-temperature economizer system capable of eliminating ammonia bisulfate deposition |
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| Publication Number | Publication Date |
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| CN222703286U true CN222703286U (en) | 2025-04-01 |
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| CN202421323828.6U Active CN222703286U (en) | 2024-06-12 | 2024-06-12 | Low-temperature economizer system capable of eliminating ammonia bisulfate deposition |
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| CN (1) | CN222703286U (en) |
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2024
- 2024-06-12 CN CN202421323828.6U patent/CN222703286U/en active Active
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