CN220195807U - SCR denitration's companion heat sweeps device and ammonia pipeline - Google Patents
SCR denitration's companion heat sweeps device and ammonia pipeline Download PDFInfo
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- CN220195807U CN220195807U CN202320627478.1U CN202320627478U CN220195807U CN 220195807 U CN220195807 U CN 220195807U CN 202320627478 U CN202320627478 U CN 202320627478U CN 220195807 U CN220195807 U CN 220195807U
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 240
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 113
- 238000010926 purge Methods 0.000 claims abstract description 59
- 238000010408 sweeping Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 5
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 abstract description 13
- 230000008025 crystallization Effects 0.000 abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a heat tracing and sweeping device for SCR denitration and an ammonia pipeline, wherein the heat tracing and sweeping device comprises: the auxiliary steam device, the steam tracing pipeline, the electric tracing pipeline and the steam purging pipeline; the auxiliary steam device is used for providing a steam source; the steam tracing pipeline is closely attached to the ammonia pipeline and is connected with an auxiliary steam device; the electric tracing pipeline is arranged in the thermal instrument area of the ammonia pipeline and is electrically connected with a temperature controller so as to control the heating temperature of the electric tracing pipeline through the temperature controller; one end of the steam purging pipeline is connected with the auxiliary steam device, and the other end of the steam purging pipeline is connected with the air inlet of the ammonia pipeline so as to purge the inside of the ammonia pipeline with steam. The temperature of the ammonia pipeline can not be reduced to the temperature at which crystallization can be generated, valve blockage caused by crystallization is avoided, subsequent equipment such as flue gas dust removal can be operated normally, and further data measurement results are more accurate.
Description
Technical Field
The utility model relates to the technical field of denitration equipment of thermal power plants, in particular to a heat tracing and sweeping device for SCR denitration and an ammonia pipeline.
Background
In the thermal power generation process, the pulverized coal can burn with low nitrogen in a hearth of the boiler, so that the emission of nitrogen oxides cannot meet the standard, and therefore, the flue gas generated after combustion needs to be treated, and the emission of the nitrogen oxides is reduced, and the pollution of the flue gas to the environment is reduced. Among them, SCR (selective catalytic reduction) is widely used as a representative of flue gas denitration technology because of its advantages of stable denitration efficiency, safety, reliability, high cost performance, and the like.
In the existing SCR flue gas denitration process, the principle is that ammonia gas selectively reacts with nitrogen oxides in flue gas in an oxidation-reduction mode under the action of a catalyst (the temperature of the catalyst is 300-450 ℃), and the nitrogen oxides in the flue gas are converted into nitrogen and water, so that the purpose of denitration is achieved. Wherein, generally can produce ammonia and regard as the reductant through urea granule hydrolysis, but, urea can produce ammonia, carbon dioxide and vapor's mixed gas after the hydrolysis, because spout the unequal factor of ammonia, unavoidable ammonia escape phenomenon can appear, at this in-process, the temperature of flue gas can reduce gradually, can produce crystallization such as ammonium chloride, ammonium carbamate this moment, lead to the valve of ammonia pipeline to block up easily, and then make the data measurement result in the pin removal measuring point region in the ammonia pipeline inaccurate, and make equipment such as follow-up flue gas dust removal unable normal operating, can reduce equipment's life simultaneously.
Therefore, the existing SCR flue gas denitration process is easy to generate isocrystallization, and the normal use of an ammonia pipeline is affected.
Disclosure of Invention
The utility model provides a heat tracing and sweeping device for SCR denitration and an ammonia pipeline, which are used for solving the problem that the normal use of the ammonia pipeline is affected due to the fact that isocrystallization is easy to occur in the existing SCR flue gas denitration process.
The heat tracing and sweeping device for SCR denitration provided by the utility model comprises: the auxiliary steam device is used for providing a steam source; the steam tracing pipeline is closely attached to the ammonia pipeline and is connected with the auxiliary steam device; the electric tracing pipeline is arranged in the thermal instrument area of the ammonia pipeline, and is electrically connected with a temperature controller so as to control the heating temperature of the electric tracing pipeline through the temperature controller; and one end of the steam purging pipeline is connected with the auxiliary steam device, and the other end of the steam purging pipeline is connected with the air inlet of the ammonia pipeline so as to steam purge the interior of the ammonia pipeline.
In some embodiments, the heat tracing and sweeping device further comprises: the electric tracing auxiliary pipeline is wound on the measuring point sampling area of the ammonia pipeline and is electrically connected with the temperature controller so as to control the heating temperature of the electric tracing auxiliary pipeline through the temperature controller; the temperature controller is also connected with an electric tracing pipeline for electricity so as to control the heating temperature of the electric tracing pipeline through the temperature controller.
In some embodiments, the heat tracing and sweeping device further comprises: and one end of the steam purging auxiliary pipeline is connected with the auxiliary steam device, and the other end of the steam purging auxiliary pipeline is opposite to the measuring point sampling area of the ammonia pipeline through the air inlet of the ammonia pipeline.
In some embodiments, signal output ends of the auxiliary steam device are respectively and electrically connected with signal input ends of the steam tracing pipeline, the steam purging pipeline and the steam purging auxiliary pipeline, and are used for controlling the opening or closing of the steam tracing pipeline, the steam purging pipeline and the steam purging auxiliary pipeline; the signal output end of the temperature controller is respectively and electrically connected with the signal input ends of the electric tracing pipeline and the electric tracing auxiliary pipeline and is used for controlling the opening or closing of the electric tracing pipeline and the electric tracing auxiliary pipeline.
In some embodiments, the heat tracing and sweeping device further comprises: the signal input end of the master controller is electrically connected with the denitration system of the ammonia pipeline and is used for receiving the operation signal of the denitration system; the signal output end of the main controller is electrically connected with the signal input end of the auxiliary steam device and the signal input end of the temperature controller, and can transmit an opening or closing signal to the auxiliary steam device and the temperature controller according to the received operation signal of the denitration system.
In some embodiments, a manual stop valve is arranged on the steam purging auxiliary pipeline and is used for manually controlling the steam purging auxiliary pipeline to purge the measuring point sampling area of the ammonia pipeline.
In some embodiments, the electric tracing pipeline is integrally armored electric tracing and is arranged in the thermal instrument area of the ammonia pipeline in a bending coil mode; the electric tracing auxiliary pipeline is high-temperature silicon rubber electric tracing and can be extended.
In some embodiments, a heat conducting layer is arranged between the electric tracing pipeline and the ammonia pipeline; and an insulating layer is arranged on the outer sides of the electric tracing pipeline and the ammonia pipeline.
In some embodiments, the heat conducting layer is made of heat insulation mud; the heat insulating layer is made of asbestos.
An ammonia gas pipeline based on the same concept, comprising: the heat tracing sweeping device as mentioned in any one of the above embodiments; the steam tracing pipeline and the electric tracing pipeline of the heat tracing sweeping device are arranged along the ammonia pipeline together, wherein the electric tracing pipeline is further wound on one side of a thermal instrument area of the ammonia pipeline.
The utility model has the beneficial effects that:
the heat tracing and sweeping device for SCR denitration can perform heat preservation and heating on the whole ammonia pipeline through the steam tracing pipeline while the denitration system of the ammonia pipeline is running, and perform fixed-point heating and heat preservation on a thermal instrument area of the ammonia pipeline through the electric tracing pipeline, so that the temperature of the ammonia pipeline cannot be reduced to the crystallization temperature of substances such as ammonium chloride and ammonium carbamate, valve blockage caused by crystallization in the ammonia pipeline is avoided, subsequent equipment such as flue gas dust removal can normally operate, and the service life of the equipment is prolonged. And finally, the steam purging pipeline is used for purging the ammonia pipeline, so that crystals in the ammonia pipeline are difficult to clear and the ammonia pipeline is purged completely, and the data measurement result of the out-of-stock measuring point area in the ammonia pipeline is more accurate.
The ammonia pipeline can avoid crystallization in the ammonia pipeline as much as possible under limited space and operation environment, and can quickly clean the generated crystallization in the ammonia pipeline. Simple structure, capability of being refitted on the original ammonia pipeline, higher cost performance, saving equipment cost and improving working efficiency
Drawings
FIG. 1 is a schematic structural view of some embodiments of a heat tracing and sweeping device for SCR denitration according to the present utility model;
FIG. 2 is a schematic diagram of an ammonia line according to some embodiments of the utility model.
In the drawings, 100, auxiliary steam means; 110. a steam tracing pipeline; 120. a steam purge line; 130. a steam purging auxiliary line; 200. a temperature controller; 210. an electric tracing pipeline; 220. an electric tracing auxiliary pipeline; 300. a master controller; 400. an ammonia gas pipeline; 410. a hydrolyzer; 420. an ammonia-air mixer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 and 2, a heat tracing and sweeping device for SCR denitration includes an auxiliary steam device 100, a steam tracing pipeline 110, an electric tracing pipeline 210, and a steam sweeping pipeline 120. The auxiliary steam device 100 is used to provide a source of steam. The steam tracing pipeline 110 is closely attached to the ammonia pipeline 400, and the steam tracing pipeline 110 is connected with the auxiliary steam device 100. The electric tracing pipeline 210 is disposed in the thermal instrument area of the ammonia gas pipeline 400, and is electrically connected with a temperature controller, so as to control the heating temperature of the electric tracing pipeline through the temperature controller. One end of the steam purge line 120 is connected to the auxiliary steam device 100, and the other end is connected to the air inlet of the ammonia line 400, so as to steam purge the inside of the ammonia line 400.
Specifically, the auxiliary steam device 100 is connected to the steam tracing pipeline 110, and is used for conveying steam to the steam tracing pipeline 110, the steam tracing pipeline 110 is fixed along the ammonia pipeline 400 and is clung to the outer wall of the ammonia pipeline 400, and the steam conveyed by the auxiliary steam device 100 is used for heating and preserving heat for the ammonia pipeline 400. Wherein, the steam tracing pipeline 110 avoids the thermal instrument area on the ammonia pipeline 400 when being arranged, does not play a direct heating effect on the thermal instrument area, but heats and keeps warm through the electric tracing pipeline 210 arranged on the outer wall of the thermal instrument area of the ammonia pipeline 400, thereby facilitating the accurate control of the temperature of the ammonia pipeline 400 by staff. The steam purging pipeline 120 is connected with the steam tracing pipeline 110, steam is conveyed to the inside of the ammonia pipeline 400 through the air inlet of the ammonia pipeline 400, the inside of the ammonia pipeline 400 is purged in a large range, after the denitration system of the ammonia pipeline 400 is stopped, the ammonia pipeline 400 is in an exit state, the temperature of the inside is reduced, residual steam can be combined with ammonia gas and carbon dioxide gas to generate crystallization blocking pipelines such as ammonium carbamate after being condensed when being cooled, however, in general, the temperature of the mixed gas combined with the ammonia gas, the steam and the carbon dioxide is about 80 ℃, the inside of the ammonia pipeline 400 is purged by the steam purging pipeline 120, the residual mixed gas in the ammonia pipeline 400 can be purged completely, and when the denitration system of the ammonia pipeline 400 is started, the ammonia pipeline 400 is purged by the steam purging pipeline 120, dust impurities entering the ammonia pipeline 400 when the denitration system of the ammonia pipeline 400 is stopped are cleared completely, the time length of each time the ammonia pipeline 400 is more than 30 minutes, and the data measurement of a pin measuring point area in the ammonia pipeline 400 can be more accurately purged.
In some embodiments of the present utility model, the heat trace purge device further includes an electrical heat trace auxiliary line 220. The electric tracing auxiliary pipeline 220 is wound around the measuring point sampling area of the ammonia pipeline 400, and the electric tracing auxiliary pipeline 220 is electrically connected with the temperature controller 200, so as to control the heating temperature of the electric tracing auxiliary pipeline 220 through the temperature controller 200. The temperature controller 200 is also connected to an electric tracing pipeline to control the heating temperature of the electric tracing pipeline 210 through the temperature controller 200.
Specifically, because the general mounted position of the electric tracing pipeline 210 can only directly heat one side of the transmitter flange plate in the thermal instrument area of the ammonia pipeline 400, the heating of the ammonia pipeline 400 is uneven, and the electric tracing pipeline 210 is easy to damage, so that the part of the pipeline inside in the thermal instrument area of the ammonia pipeline 400 is crystallized, therefore, the electric tracing auxiliary pipeline 220 is wound on the outer wall of the measuring point sampling area of the ammonia pipeline 400, the other side of the transmitter flange plate can be heated, the smoothness of the ammonia pipeline 400 is ensured, and the probability of crystallization is further reduced. Meanwhile, the electric tracing auxiliary pipeline 220 is also connected with the temperature controller 200, and the heating temperature of the electric tracing auxiliary pipeline 220 can be controlled through the temperature controller 200. The temperature controller 200 is also connected with the electric tracing pipeline 210, and the heating temperature of the electric tracing pipeline 210 is controlled to be 135 ℃ through the temperature controller 200, so that the temperature of the thermal instrument area of the ammonia pipeline 400 can be ensured to be always higher than the required temperature for generating crystals, the generation of the crystals is avoided, meanwhile, the heating temperature of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 is also conveniently adjusted by workers at the same time, and the working efficiency is improved.
In some embodiments of the present utility model, the heat trace purge arrangement further includes a steam purge auxiliary line 130. One end of the steam purging auxiliary pipeline 130 is connected with the auxiliary steam device 100, and the other end of the steam purging auxiliary pipeline is opposite to the measuring point sampling area of the ammonia pipeline 400 through the air inlet of the ammonia pipeline 400.
Specifically, a path of steam source is led out on the auxiliary steam device 100 and is communicated with the inside of the measuring point sampling area of the ammonia pipeline 400 through the steam purging auxiliary pipeline 130, so that the crystallization generated in the ammonia pipeline 400 can be purged at fixed points, and the crystallization is melted through steam purging, so that the ammonia pipeline 400 is kept smooth.
It should be noted that, the material of the equipment for measuring the measuring point sampling area of the ammonia pipeline has the characteristic of high temperature resistance, and auxiliary steam can not influence the equipment.
In some embodiments of the present utility model, signal output terminals of the auxiliary steam device 100 are electrically connected to signal input terminals of the steam tracing pipeline 110, the steam purge pipeline 120 and the steam purge auxiliary pipeline 130, respectively, for controlling opening or closing of the steam tracing pipeline 110, the steam purge pipeline 120 and the steam purge auxiliary pipeline 130. The signal output end of the temperature controller 200 is electrically connected with the signal input ends of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220, respectively, and is used for controlling the opening or closing of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220.
Specifically, the signal output end of the auxiliary steam device 100 can transmit an opening or closing command signal to the signal input ends of the steam tracing pipeline 110, the steam purging pipeline 120 and the steam purging auxiliary pipeline 130, so that the opening and closing of the steam tracing pipeline 110, the steam purging pipeline 120 and the steam purging auxiliary pipeline 130 can be controlled by a worker through controlling the auxiliary steam device 100, and the working efficiency is improved. The signal output end of the temperature controller 200 can transmit an opening or closing instruction signal to the signal input ends of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220, so that a worker can adjust the heating temperatures of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 by controlling the temperature controller 200, and can control the opening and closing of the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 by controlling the temperature controller 200, thereby facilitating the operation control of the worker and improving the working efficiency.
In some embodiments of the present utility model, the heat trace purge device further includes a general controller 300. The signal input end of the master controller 300 is electrically connected with the denitration system of the ammonia pipeline 400 and is used for receiving the operation signal of the denitration system. The signal output end of the main controller 300 is electrically connected with the signal input end of the auxiliary steam device 100 and the signal input end of the temperature controller 200, and can transmit an on or off signal to the auxiliary steam device 100 and the temperature controller 200 according to the received operation signal of the denitration system.
Specifically, the signal input end of the overall controller 300 may receive an operation state signal of the denitration system of the ammonia pipeline 400, and send an on or off command signal to the signal input ends of the auxiliary steam device 100 and the temperature controller 200 through the signal output end of the overall controller 300 according to the operation state signal, and finally, the auxiliary steam device 100 and the temperature controller 200 control the corresponding steam tracing pipeline 110, the steam purging pipeline 120, the steam purging auxiliary pipeline 130, or the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 to be opened or closed according to the on or off command signal. When the denitration system of the ammonia gas pipeline 400 is in an operating state, the master controller 300 respectively transmits an opening command signal to the auxiliary steam device 100 and the temperature controller 200, the auxiliary steam device 100 and the temperature controller 200 control the corresponding steam tracing pipeline 110, the steam purging pipeline 120, the steam purging auxiliary pipeline 130, the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 to be opened, and when the denitration system of the ammonia gas pipeline 400 is in a stop operating state, the master controller 300 respectively transmits a closing command signal to the auxiliary steam device 100 and the temperature controller 200, and the auxiliary steam device 100 and the temperature controller 200 control the corresponding steam tracing pipeline 110, the steam purging pipeline 120, the steam purging auxiliary pipeline 130, the electric tracing pipeline 210 and the electric tracing auxiliary pipeline 220 to be closed. The heating and heat preservation process is automated, and the task amount of workers is reduced.
It should be noted that, the auxiliary steam device 100 and the temperature controller 200 may still be used to independently control the opening or closing of the corresponding steam tracing pipeline 110, the steam purge pipeline 120, the steam purge auxiliary pipeline 130, the electric tracing pipeline 210, and the electric tracing auxiliary pipeline 220. For example, when the denitration system of the ammonia gas pipeline 400 is in a stop operation state, the master controller 300 transmits a closing instruction signal to the auxiliary steam device 100, and the auxiliary steam device 100 controls the steam purge pipeline 120 to be closed, so that even if the denitration system of the ammonia gas pipeline 400 is in a stop operation state, the auxiliary steam device 100 can directly control the steam purge pipeline 120 to be opened. The operation is convenient for the staff according to actual conditions.
In some embodiments of the present utility model, a manual shut-off valve is provided on the steam purge auxiliary line 130 for manually controlling the steam purge auxiliary line 130 to purge the site sampling area of the ammonia line 400.
Specifically, set up two manual stop valves on steam sweeps auxiliary line 130, can effectually prevent steam, ammonia's leakage when the ammonia pipeline 400 breaks down, and can effectually prevent that ammonia from polluting auxiliary steam, simultaneously, when installing multiple heat tracing can't solve the problem that ammonia pipeline 400 produced the crystallization additional, the staff can manually open manual stop valve, make steam sweeps auxiliary line 130 blowout steam and sweeps ammonia pipeline 400, melt the inside crystallization of ammonia pipeline 400, make still can fix a point to carrying out steam sweeps to ammonia pipeline 400 in the operating period of the denitration system of ammonia pipeline 400, because steam source that steam sweeps auxiliary line 130 connects is less, also can not cause the influence to the SCR denitration process.
In some embodiments of the present utility model, the electric tracing pipeline 210 is integrally armored electric tracing, and is disposed in the thermal instrument area of the ammonia pipeline 400 by means of a bending coil, so that the thermal instrument area of the ammonia pipeline 400 can be reinforced with heat tracing, and the electric tracing pipeline 210 can be prevented from being damaged easily by providing armor. The electric tracing auxiliary pipeline 220 is high-temperature silicone rubber electric tracing, can extend, and can be fully wound on the outer wall of the measuring point sampling area of the ammonia pipeline 400 through the ductility of the high-temperature silicone rubber electric tracing, so that the heating area is increased.
In some embodiments of the present utility model, a heat conducting layer is disposed between the electric tracing pipeline 210 and the ammonia pipeline 400, so as to improve heat conducting efficiency. The heat insulation layers are arranged on the outer sides of the electric tracing pipeline 210 and the ammonia gas pipeline 400, so that heat cannot be emitted. Wherein, the material of heat conduction layer is heat preservation mud. The heat insulating layer is made of asbestos.
Referring to fig. 1 and 2, the present utility model further provides an ammonia gas pipeline, including a heat tracing and sweeping device according to any one of the specific embodiments. The steam tracing pipeline 110 and the electric tracing pipeline 210 of the heat tracing sweeping device are jointly arranged along the ammonia pipeline 400, wherein the electric tracing pipeline 210 is further wound on one side of a thermal instrument area of the ammonia pipeline 400. One end of the ammonia gas pipeline 400 is connected with a hydrolyzer 410, and the other end is connected with an ammonia-air mixer 420. Wherein PT is the manometer, FT is the flowmeter, and manometer and flowmeter place region are the thermal instrument region of ammonia pipeline.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means 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 utility model. In this specification, schematic representations of terms 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 present utility model is not limited to the above preferred embodiments, and any person skilled in the art, within the scope of the present utility model, may apply to the present utility model, and equivalents and modifications thereof are intended to be included in the scope of the present utility model.
Claims (10)
1. The utility model provides a companion heat sweeping device of SCR denitration which characterized in that includes:
an auxiliary steam device for providing a source of steam;
the steam tracing pipeline is closely attached to the ammonia pipeline and is connected with the auxiliary steam device;
the electric tracing pipeline is arranged in the thermal instrument area of the ammonia pipeline, and is electrically connected with a temperature controller so as to control the heating temperature of the electric tracing pipeline through the temperature controller;
and one end of the steam purging pipeline is connected with the auxiliary steam device, and the other end of the steam purging pipeline is connected with the air inlet of the ammonia pipeline so as to purge the inside of the ammonia pipeline with steam.
2. The heat trace sweeping device for SCR denitration according to claim 1, wherein said heat trace sweeping device further comprises:
the electric tracing auxiliary pipeline is wound on the measuring point sampling area of the ammonia pipeline and is electrically connected with the temperature controller so as to control the heating temperature of the electric tracing auxiliary pipeline through the temperature controller;
the temperature controller is also connected with the electric tracing pipeline to control the heating temperature of the electric tracing pipeline through the temperature controller.
3. The heat trace sweeping device for SCR denitration according to claim 2, wherein said heat trace sweeping device further comprises:
the auxiliary steam device is connected to one end of the auxiliary steam purging pipeline, and the other end of the auxiliary steam purging pipeline is opposite to the measuring point sampling area of the ammonia pipeline through the air inlet of the ammonia pipeline.
4. The heat tracing sweeping device for SCR denitration according to claim 3, wherein signal output ends of the auxiliary steam device are electrically connected with signal input ends of the steam tracing pipeline, the steam sweeping pipeline and the steam sweeping auxiliary pipeline respectively, and are used for controlling opening or closing of the steam tracing pipeline, the steam sweeping pipeline and the steam sweeping auxiliary pipeline;
the signal output end of the temperature controller is respectively and electrically connected with the signal input ends of the electric heat tracing pipeline and the electric heat tracing auxiliary pipeline and is used for controlling the opening or closing of the electric heat tracing pipeline and the electric heat tracing auxiliary pipeline.
5. The heat trace sweeping device for SCR denitration according to claim 4, wherein said heat trace sweeping device further comprises:
the signal input end of the master controller is electrically connected with the denitration system of the ammonia pipeline and is used for receiving the operation signal of the denitration system; the signal output end of the main controller is electrically connected with the signal input end of the auxiliary steam device and the signal input end of the temperature controller, and can transmit an opening or closing signal to the auxiliary steam device and the temperature controller according to the received operation signal of the denitration system.
6. The heat tracing sweeping device for SCR denitration according to claim 5, wherein the steam sweeping auxiliary pipeline is provided with a manual stop valve for manually controlling the steam sweeping auxiliary pipeline to sweep the measuring point sampling area of the ammonia pipeline.
7. The SCR denitration heat tracing sweeping device according to claim 5, wherein the electric tracing pipeline is integrally armored electric tracing and is arranged in a thermal instrument area of the ammonia pipeline in a bending coil mode;
the electric tracing auxiliary pipeline is high-temperature silicon rubber electric tracing and can be extended.
8. The heat tracing sweeping device for SCR denitration according to claim 5, wherein a heat conducting layer is arranged between the electric tracing pipeline and the ammonia pipeline;
and an insulating layer is arranged on the outer sides of the electric tracing pipeline and the ammonia pipeline.
9. The heat tracing sweeping device for SCR denitration according to claim 8, wherein the heat conducting layer is made of heat insulation mud;
the heat preservation layer is made of asbestos.
10. An ammonia gas pipeline, comprising:
the heat tracing sweeping apparatus according to any one of claims 1 to 9;
the steam tracing pipeline and the electric tracing pipeline of the heat tracing sweeping device are arranged together along the ammonia pipeline, wherein the electric tracing pipe is further wound on one side of a thermal instrument area of the ammonia pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627478.1U CN220195807U (en) | 2023-03-27 | 2023-03-27 | SCR denitration's companion heat sweeps device and ammonia pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627478.1U CN220195807U (en) | 2023-03-27 | 2023-03-27 | SCR denitration's companion heat sweeps device and ammonia pipeline |
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| CN220195807U true CN220195807U (en) | 2023-12-19 |
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| CN202320627478.1U Active CN220195807U (en) | 2023-03-27 | 2023-03-27 | SCR denitration's companion heat sweeps device and ammonia pipeline |
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| Country | Link |
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| CN (1) | CN220195807U (en) |
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- 2023-03-27 CN CN202320627478.1U patent/CN220195807U/en active Active
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