CN214437949U - Exhaust-heat boiler system and kiln system - Google Patents

Abstract

The utility model discloses a waste heat boiler system and kiln system, waste heat boiler system include flue gas passageway, first bypass passageway and denitration reaction unit, and the flue gas passageway is equipped with first valve and second valve along the circulation direction of flue gas in proper order, and denitration reaction unit installs in flue gas passageway to be located between first valve and the second valve, be equipped with the denitration catalyst among the denitration reaction unit. The kiln system comprises a waste heat boiler system. The exhaust-heat boiler system is provided with the denitration reaction device in the flue gas channel, so that the equipment structure is simplified. When the denitration catalyst loses activity, the first valve and the second valve can be closed, and the third valve is opened, so that the flue gas flows out through the flue gas inlet, the first bypass channel and the flue gas outlet in sequence. The maintainer can carry out maintenance work and change denitration catalyst to the flue gas passageway between first valve and the second valve, realizes changing the function of denitration catalyst in real time, and convenient maintenance is changed.

Description

Exhaust-heat boiler system and kiln system

Technical Field

The utility model is used for glass exhaust-heat boiler technical field especially relates to an exhaust-heat boiler system and kiln system.

Background

The waste heat boiler of the glass kiln is additionally arranged on a flue at the tail part of the glass kiln, and can achieve the purposes of recovering waste heat of waste flue gas and protecting the environment. In the glass processing process, the exhaust-heat boiler needs to adopt a denitration system to denitrate the flue gas generated by the glass kiln. Because denitration catalyst among the deNOx systems when losing the activity in the use, need in time change denitration catalyst. In the glass processing process, the glass waste heat boiler can only continuously run and can not be shut down, so that the traditional waste heat boiler system can only adopt the medium temperature (380-400 ℃) to arrange the SCR catalyst outside the furnace to denitrate the flue gas, the mode of arranging the denitration catalyst outside the furnace makes the structure of the waste heat boiler system extremely complex, the blockage is easily caused, and the high-temperature part of the flue gas channel can not be denitrated, so that the acid removal is not timely, and the front part of the flue gas channel is seriously corroded.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a exhaust-heat boiler system and kiln system, when it places the denitration catalyst in flue gas passageway, can realize changing the function of denitration catalyst in real time, solve the problem that the denitration catalyst blockked up, conveniently maintain change work.

The utility model provides a technical scheme that its technical problem adopted is:

in a first aspect, the waste heat boiler system comprises a flue gas channel, a first bypass channel and a denitration reaction device, wherein the flue gas channel is provided with a flue gas inlet and a flue gas outlet, the flue gas channel is sequentially provided with a first valve and a second valve along the flowing direction of flue gas, the denitration reaction device is installed in the flue gas channel and is located between the first valve and the second valve, a denitration catalyst is arranged in the denitration reaction device, the flue gas channel is close to one side of the flue gas inlet and connected with one end of the first bypass channel, the flue gas channel is close to the second valve, one side of the flue gas outlet is connected with the other end of the first bypass channel, and a third valve is arranged on the first bypass channel.

With reference to the first aspect, in certain implementation manners of the first aspect, a first water pipe evaporator, a heat pipe evaporator and a second water pipe evaporator are sequentially arranged between the denitration reaction device and the second valve in the flue gas channel, one end of the heat pipe evaporator is connected with a boiler barrel, water is arranged in the boiler barrel, the other end of the heat pipe evaporator extends into the flue gas channel, and a third water pipe evaporator is arranged between the second valve and the first bypass channel in the flue gas channel.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the exhaust gas purification device further includes a second bypass channel, the exhaust gas channel is connected to one end of the second bypass channel between the second water pipe evaporator and the second valve, the exhaust gas channel is connected to the other end of the second bypass channel at the exhaust gas outlet, the second bypass channel is provided with a fourth valve, and the exhaust gas channel is provided with an access hole at the third water pipe evaporator.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the smoke channel is provided with first closing sections on both sides of the first valve, the first closing sections close to the direction close to the first valve, the smoke channel is provided with second closing sections on both sides of the second valve, and the second closing sections close to the direction close to the second valve.

Combine first aspect and above-mentioned implementation, in some implementation of the first aspect, still include the draught fan, the flue gas passageway in first valve is close to one side of flue gas entry is equipped with first cold wind entry, the flue gas passageway in the second valve is close to one side of exhanst gas outlet is equipped with the cold wind entry of second, the draught fan be used for to first cold wind entry with introduce the wind in the cold wind entry of second, first cold wind entry and the cold wind entry of second all are equipped with the fifth valve.

With reference to the first aspect and the foregoing implementations, in certain implementations of the first aspect, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve each include an electrically-operated valve.

With reference to the first aspect and the foregoing implementation manners, in certain implementation manners of the first aspect, an ammonia spraying device is disposed at the flue gas inlet, ammonia water is disposed in the ammonia spraying device, and the ammonia spraying device is configured to spray the ammonia water to the flue gas channel.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, the flue gas outlet is provided with a spray cooling device, the spray cooling device is provided with spray liquid, and the spray cooling device is used for spraying the spray liquid to the flue gas channel.

With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, a drain opening is disposed on the flue gas outlet of the flue gas channel, and a drain valve is disposed on the drain opening.

In a second aspect, a kiln system comprises the waste heat boiler system of any one of the implementations of the first aspect.

One of the above technical solutions has at least one of the following advantages or beneficial effects: the exhaust-heat boiler system among this technical scheme is through setting up denitration reaction device in flue gas passageway, simplifies equipment structure, and the flue gas can be reacted with the denitration catalyst is quick, solves the problem that denitration catalyst blockked up. Adopt the mode that first bypass passageway connects in flue gas channel's both ends simultaneously, when the denitration catalyst loses the activity, can close first valve and second valve, open the third valve for the flue gas flows through flue gas inlet, first bypass passageway, exhanst gas outlet in proper order, in order to get into next process. The maintainer can be to the flue gas passageway between first valve and the second valve overhaul the work and change the denitration catalyst in the denitration reactor, realizes changing the function of denitration catalyst in real time, and convenient maintenance is changed.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic front view of one embodiment shown in FIG. 1.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it is not intended to indicate or imply that the technical features indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the utility model, the meaning of a plurality of is one or more, the meaning of a plurality of is more than two, and the meaning of more than two is understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "set", "install", "connect", and the like are to be understood in a broad sense, and for example, may be directly connected or may be indirectly connected through an intermediate medium; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1, the embodiment of the utility model provides a waste heat boiler system, including flue gas passageway 1, first bypass passageway 2 and denitration reaction unit 3, flue gas passageway 1 has flue gas inlet 11 and exhanst gas outlet 12, and flue gas passageway 1 is equipped with first valve 41 and second valve 42 along the circulation direction of flue gas in proper order, and flue gas passageway 1 is equipped with flue gas inlet 11, first valve 41, second valve 42 and exhanst gas outlet 12 along the circulation direction of flue gas in proper order promptly. The denitration reactor 3 is installed in the flue gas channel 1 and between the first valve 41 and the second valve 42, so that the equipment structure can be simplified. The denitration reactor 3 is provided with a denitration catalyst. When the flue gas flows into flue gas passageway 1, can react with denitration catalyst is quick, carries out the denitration and removes acid, avoids causing flue gas passageway 1 to block up and corrode. The flue gas channel 1 is connected to one end of the first bypass channel 2 at the side of the first valve 41 close to the flue gas inlet 11, and the flue gas channel 1 is connected to the other end of the first bypass channel 2 at the side of the second valve 42 close to the flue gas outlet 12. The first bypass passage 2 is provided with a third valve 43 for controlling the opening and closing of the first bypass passage 2. When the denitration catalyst does not need to be replaced or other maintenance work is carried out (namely, the waste heat boiler is in a normal working state), the third valve 43 is closed, the first valve 41 and the second valve 42 are opened, and the flue gas can flow out through the flue gas channel 1 and the flue gas outlet 12 in sequence after entering through the flue gas inlet 11; when needing to change the denitration catalyst or carrying out other maintenance work, open third valve 43 and close first valve 41 and second valve 42, the flue gas can flow out through first bypass passageway 2, exhanst gas outlet 12 in proper order after flue gas inlet 11 gets into to conveniently change the mode and normally work mode between the maintenance.

Waste heat boiler system among this technical scheme is through setting up denitration reaction device 3 in flue gas passageway 1, simplifies equipment structure, and the flue gas can react with denitration catalyst fast, solves the problem that denitration catalyst blockked up. Meanwhile, the first bypass channel 2 is connected to two ends of the flue gas channel 1, when the denitration catalyst loses activity, the first valve 41 and the second valve 42 can be closed, and the third valve 43 can be opened, so that flue gas flows out through the flue gas inlet 11, the first bypass channel 2 and the flue gas outlet 12 in sequence to enter the next process. The maintainer can be to the flue gas passageway 1 between first valve 41 and the second valve 42 maintenance work and change the denitration catalyst in the denitration reactor, realizes changing the function of denitration catalyst in real time, and convenient maintenance is changed.

Referring to fig. 1 and 2, in some embodiments, the flue gas channel 1 is provided with a first water pipe evaporator 51, a heat pipe evaporator 52 and a second water pipe evaporator 53 in sequence between the denitration reactor 3 and the second valve 42, that is, the first valve 41, the denitration reactor 3, the first water pipe evaporator 51, the heat pipe evaporator 52, the second water pipe evaporator 53 and the second valve 42 are arranged in sequence along the flow direction of the flue gas. Before arranging denitration reaction unit 3 in each evaporimeter, usable high temperature denitration catalyst carries out the denitration to the flue gas, and the denitration is efficient, has higher anti sulphur performance. In addition, denitration work is carried out in exhaust-heat boiler's high temperature stage promptly exhaust-heat boiler's front portion, can effectively avoid traditional exhaust-heat boiler to adopt the anterior problem that is corroded of exhaust-heat boiler that the middle part denitration leads to, reduction equipment cost.

Referring to fig. 1, one end of the heat pipe evaporator 52 is connected to the drum 54, water is provided in the drum 54, and the other end of the heat pipe evaporator 52 extends into the flue gas channel 1, so that heat in the flue gas channel 1 is absorbed by the heat pipe evaporator 52. The water in the drum 54 flows to the flue gas channel 1 through the heat pipes of the heat pipe evaporator 52 to absorb the heat of the flue gas and evaporate, the water is evaporated to form steam and then flows reversely to the drum 54, the steam is condensed into water in the drum 54, and the circulation is carried out. The purpose of efficient heat transfer is achieved by circulating a bi-directional fluid through the heat pipes of the heat pipe evaporator 52 and the drum 54. Specifically, the temperature of the flue gas entering from the flue gas inlet 11 is about 450-500 ℃, the first water tube evaporator 51 exchanges heat with the high-temperature flue gas to reduce the temperature of the flue gas, and when the temperature of the flue gas is cooled to 350-380 ℃, the temperature of the flue gas can be reduced by the hot tube evaporator 52. The flue gas in the temperature range can ensure that the heat pipe is not exploded, and meanwhile, high-efficiency heat exchange is realized. The heat pipe evaporator 52 absorbs the heat of the flue gas and reduces the temperature of the flue gas to about 270-300 ℃, and then the flue gas is cooled by the second water pipe evaporator 53 and reduced to about 240-270 ℃.

Referring to fig. 1 and 2, a third water tube evaporator 55 is arranged between the second valve 42 and the first bypass passage 2 in the flue gas passage 1, and the flue gas passes through the second water tube evaporator 53 and then the third water tube evaporator 55, so that the flue gas can be cooled to 170-200 ℃, and the temperature requirement of the next working procedure such as desulfurization and the like can be met. Under the advantages of strong stability of the water pipe evaporator, high heat pipe heat transfer coefficient of the heat pipe evaporator 52 and the like, the problems of pipe explosion of the heat pipe and low service life of the heat pipe can be solved by mixing the heat pipe and the water pipe in the flue gas channel 1 and reasonably setting the distribution positions of the heat pipe evaporator 52 and the water pipe evaporator, the working stability is improved, meanwhile, the temperature can be effectively reduced, and the use cost of the waste heat boiler is reduced.

Referring to fig. 1, in some embodiments, the waste heat boiler system further includes a second bypass channel 6, the flue gas channel 1 is connected to one end of the second bypass channel 6 between the second water tube evaporator 53 and the second valve 42, the flue gas channel 1 is connected to the other end of the second bypass channel 6 at the flue gas outlet 12, the second bypass channel 6 is provided with a fourth valve 44, and the flue gas channel 1 is provided with an access opening 13 at the third water tube evaporator 55. When the flue gas channel 1 can be normally used, the fourth valve 44 is closed, so that the flue gas flows out from the flue gas outlet 12 after being cooled by the third water pipe evaporator 55; when the third water pipe evaporator 55 in the flue gas channel 1 breaks down, the second valve 42 can be closed, and the fourth valve 44 can be opened, so that the flue gas flows to the flue gas outlet 12 from the second bypass channel 6 after passing through the second water pipe evaporator 53, and the maintainer can repair the third water pipe evaporator 55 through the access hole 13, thereby meeting the requirement of the furnace for non-stop work.

When the denitration catalyst in the flue gas channel 1 fails to work or the third water pipe evaporator 55 fails, the flue gas channel 1 needs to stop working, and the flue gas flows through the first bypass channel 2 or the second bypass channel 6. Referring to fig. 1, in some embodiments, a spray cooling device 71 is disposed at the flue gas outlet 12, a spray liquid is disposed in the spray cooling device 71, and the spray cooling device 71 is used for spraying the spray liquid to the flue gas channel 1 to cool the flue gas temperature to reduce the flue gas temperature to below 200 ℃.

Referring to fig. 1, in some embodiments, the flue gas channel 1 is provided with a water drain 72 at the flue gas outlet 12 for discharging the spray liquid in the flue gas channel 1. The drain port 72 is provided with a drain valve 73, so that the drainage can be conveniently controlled according to the use condition.

Referring to fig. 1, in some embodiments, the waste heat boiler system further includes an induced draft fan, a first cold air inlet 81 is disposed on one side of the flue gas channel 1 close to the flue gas inlet 11 of the first valve 41, a second cold air inlet 82 is disposed on one side of the flue gas channel 1 close to the flue gas outlet 12 of the second valve 42, the induced draft fan is configured to introduce cold air into the first cold air inlet 81 and the second cold air inlet 82, and fifth valves 45 are disposed at the first cold air inlet 81 and the second cold air inlet 82. When the flue gas flows through the first bypass channel 2, the fifth valve 45 can be opened, so that the cold air flows into the first bypass channel 2 through the first cold air inlet 81 and the second cold air inlet 82, and the flue gas is cooled by air to reduce the temperature of the flue gas.

Referring to fig. 1, in some embodiments, an ammonia injection device 74 is disposed at the flue gas inlet 11, ammonia water is disposed in the ammonia injection device 74, and the ammonia injection device 74 is used for injecting the ammonia water to the flue gas channel 1. The ammonia water can be sprayed to the flue gas inlet 11 of the flue gas channel 1 when the flue gas channel 1 works normally, so that the device is suitable for rapid denitration in a high-temperature environment, and the use of the working condition of the waste heat boiler of the glass kiln is met.

Referring to fig. 1 and 2, in some embodiments, the flue gas channel 1 is provided with first closing sections 14 at two sides of the first valve 41, and the first closing sections 14 close to the first valve 41, so as to facilitate installation of the first valve 41. The flue gas channel 1 is equipped with second closing-in section 15 in the both sides of second valve 42, and second closing-in section 15 closes up to the direction that is close to second valve 42, easy to assemble second valve 42.

In some embodiments, the first valve 41, the second valve 42, the third valve 43, the fourth valve 44, and the fifth valve 45 each comprise an electrically operated valve, so as to facilitate controlling the opening and closing of each valve.

Another embodiment of the utility model provides a kiln system, including exhaust-heat boiler system. Since the waste heat boiler system has been described in detail in the foregoing, it will not be described in detail herein.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. The utility model provides a waste heat boiler system, its characterized in that, includes flue gas passageway, first bypass passageway and denitration reaction unit, flue gas passageway has flue gas inlet and exhanst gas outlet, flue gas passageway is equipped with first valve and second valve along the circulation direction of flue gas in proper order, denitration reaction unit install in flue gas passageway, and be located between first valve and the second valve, be equipped with the denitration catalyst among the denitration reaction unit, flue gas passageway in first valve is close to one side of flue gas inlet with the one end of first bypass passageway is connected, flue gas passageway in the second valve is close to one side of exhanst gas outlet with the other end of first bypass passageway is connected, be equipped with the third valve on the first bypass passageway.

2. The waste heat boiler system of claim 1, wherein: the flue gas channel is provided with a first water pipe evaporator, a heat pipe evaporator and a second water pipe evaporator in sequence between the denitration reaction device and the second valve, one end of the heat pipe evaporator is connected with a boiler barrel, water is arranged in the boiler barrel, the other end of the heat pipe evaporator extends into the flue gas channel, and a third water pipe evaporator is arranged between the second valve and the first bypass channel.

3. The waste heat boiler system of claim 2, wherein: the flue gas channel is arranged between the second water pipe evaporator and the second valve and is connected with one end of the second bypass channel, the flue gas channel is connected with the other end of the second bypass channel at the flue gas outlet, the second bypass channel is provided with a fourth valve, and the flue gas channel is provided with an access hole at the third water pipe evaporator.

4. The waste heat boiler system of claim 3, wherein: still include the draught fan, the flue gas passageway in first valve is close to one side of flue gas entry is equipped with first cold wind entry, the flue gas passageway in the second valve is close to one side of exhanst gas outlet is equipped with the cold wind entry of second, the draught fan be used for to first cold wind entry with introduce cold wind in the cold wind entry of second, first cold wind entry and the cold wind entry of second all are equipped with the fifth valve.

5. The waste heat boiler system of claim 4, wherein: the first valve, the second valve, the third valve, the fourth valve and the fifth valve comprise electric valves.

6. The waste heat boiler system of claim 1, wherein: the flue gas passageway in the both sides of first valve all are equipped with first binding off section, first binding off section is to being close to the direction binding off of first valve, the flue gas passageway in the both sides of second valve all are equipped with second binding off section, second binding off section is to being close to the direction binding off of second valve.

7. The waste heat boiler system of claim 1, wherein: the flue gas entrance is equipped with spouts ammonia device, be equipped with the aqueous ammonia in spouting the ammonia device, spout ammonia device be used for with the aqueous ammonia spouts to flue gas passageway.

8. The waste heat boiler system of claim 1, wherein: the flue gas outlet is equipped with the cooling device that sprays, be equipped with in the cooling device that sprays and spray liquid, the cooling device that sprays be used for with spray liquid spout to flue gas passageway.

9. The waste heat boiler system of claim 8, wherein: the smoke channel is provided with a drain hole at the smoke outlet, and a drain valve is arranged on the drain hole.

10. A kiln system, characterized by: comprising a waste heat boiler system according to any of claims 1-9.

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