CN215785423U - Product gas main pipe purging system used in operation of denitration hydrolysis unit - Google Patents
Product gas main pipe purging system used in operation of denitration hydrolysis unit Download PDFInfo
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- CN215785423U CN215785423U CN202121034852.4U CN202121034852U CN215785423U CN 215785423 U CN215785423 U CN 215785423U CN 202121034852 U CN202121034852 U CN 202121034852U CN 215785423 U CN215785423 U CN 215785423U
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Abstract
The utility model discloses a product gas main pipe purging system used in the operation of a denitration hydrolysis unit, which comprises a passage module and a purging module, wherein the passage module comprises a pair of main pipes connected in parallel, air inlet pipes arranged at two sides of the main pipes, secondary pipes connected with the main pipes, air outlet pipes connected with the secondary pipes, and valve assemblies arranged in the main pipes and the secondary pipes; the blowing module is connected with the secondary pipeline and comprises a drain pipe arranged on the secondary pipeline and a shut-off valve arranged on the drain pipe. The system can perform the function of purging the main pipe which needs to be purged while the double-machine operation is performed, so that the product gas main pipe can be switched and purged under any condition, the operation mode is more flexible, the overhaul and the defect are convenient, and the system safety is higher.
Description
Technical Field
The utility model relates to the technical field of purging systems, in particular to a product gas main pipe purging system used in the operation of a denitration hydrolysis unit.
Background
A denitration system of a unit No. 3/4 of Huaneng Shanghai stone cave mouth power generation Limited company adopts a urea hydrolysis mode, 2 sets of urea hydrolyzers (1 is used as a spare) are arranged in an engineering mode, and the output of each hydrolyzer is designed according to 110 percent of the total ammonia of 2 furnaces. The two hydrolyzers to the SCR area adopt two main pipe ammonia pipelines (1 is provided with 1), and can be respectively supplied to two units.
When the gas generator normally operates, the gas generator operates with one main pipe and the other main pipe is standby, so that the gas generator needs to be switched regularly. After each switching, the residual product gas in the stopped-in main pipe is cleaned by using the auxiliary steam on the side of the stopped-in hydrolyzer, otherwise, the product gas is remained in the main pipe for a long time and deposited to easily form ammonium carbamate crystals to block pipelines and valves, but the product gas is only discharged into the denitration reactor through the ammonia spraying grid after the auxiliary steam cleaning pipeline is cleaned by blowing, the ammonia spraying grid of the unit cannot be stopped during operation, and the main pipe switching of the product gas can be executed only after a single unit is stopped.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the utility model.
The utility model is provided in view of the above and/or the problems existing in the existing product gas main pipe purging system used in the operation of the denitration hydrolysis unit.
Therefore, the utility model aims to provide a product gas main pipe purging system used in the operation of a denitration hydrolysis unit.
In order to solve the technical problems, the utility model provides the following technical scheme: a product gas main pipe purging system used in operation of a denitration hydrolysis unit comprises a passage module and a purging module, wherein the passage module comprises a pair of main pipes connected in parallel, air inlet pipes arranged at two sides of the main pipes, secondary pipes connected with the main pipes, air outlet pipes connected with the secondary pipes, and valve assemblies arranged in the main pipes and the secondary pipes; the blowing module comprises a drain pipe arranged on the secondary pipeline and a shut-off valve arranged on the drain pipe, and the blow-off valve is connected with the secondary pipeline.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: the female pipe include first female pipe and with the female pipe of second that first female pipe is connected side by side, the secondary pipeline include with first primary pipeline and the second secondary pipeline of first female union coupling, and with the third time pipeline and the fourth time pipeline of the female union coupling of second.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: the valve assembly includes a first valve disposed within the first parent pipe, a second valve disposed within the second parent pipe, a third valve disposed within the first secondary conduit, a fourth valve disposed within the second secondary conduit, a fifth valve disposed within the third secondary conduit, and a sixth valve disposed within the fourth secondary conduit.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: the valve assembly further includes a seventh valve disposed within the first parent pipe.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: the valve assembly further includes an eighth valve disposed within the second parent tube.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: and a ninth valve is further arranged on the first secondary pipeline, and the purging module is arranged between the ninth valve and the third valve.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: and a tenth valve is further arranged on the second secondary pipeline, and the purging module is arranged between the tenth valve and the fourth valve.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: an eleventh valve is further arranged on the third pipeline, and the purging module is arranged between the eleventh valve and the fifth valve.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: and a tenth valve is further arranged on the fourth pipeline, and the purging module is arranged between the tenth valve and the sixth valve.
As a preferred scheme of the product gas main pipe purging system for the operation of the denitration hydrolysis unit, the system comprises the following steps: the purging module further comprises a water drainage groove, and the water drainage groove is connected with the water drainage pipe.
The system has the advantages that the system can perform the function of purging the main pipe which needs to be purged while the double machines are operated, the product gas main pipe can be switched and purged under any condition, the operation mode is more flexible, the overhaul and the defect elimination are convenient, and the system safety is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a flow diagram of a product gas main purging system used in the operation of a denitration hydrolysis unit in example 1.
Fig. 2 is a flow diagram of a product gas main purging system used in the operation of the denitration hydrolysis unit in example 2.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1, a first embodiment of the present invention provides a product gas main pipe purging system for operation of a denitration hydrolysis unit, which includes a passage module 100 and a purging module 200, wherein the passage module 100 includes a pair of main pipes 101 connected in parallel, gas inlet pipes 102 disposed at both sides of the main pipes 101, secondary pipes 103 connected to the main pipes 101, gas outlet pipes 104 connected to the secondary pipes 103, and valve assemblies 105 disposed in the main pipes 101 and the secondary pipes 103; the purge module 200 includes a drain pipe 201 provided on the secondary pipe 103, and a shut-off valve 202 provided on the drain pipe 201 and connected to the secondary pipe 103.
Specifically, the main pipe 101 includes a first main pipe 101a and a second main pipe 101b connected in parallel with the first main pipe 101a, the secondary pipeline 103 includes a first secondary pipeline 103a and a second secondary pipeline 103b connected to the first main pipe 101a, and a third secondary pipeline 103c and a fourth secondary pipeline 103d connected to the second main pipe 101b, and the plurality of secondary pipelines 103 are provided to discharge the remaining product gas without affecting the operation of the unit.
Further, the valve assembly 105 includes a first valve 105a disposed in the first main pipe 101a, a second valve 105b disposed in the second main pipe 101b, a third valve 105c disposed in the first secondary pipeline 103a, a fourth valve 105d disposed in the second secondary pipeline 103b, a fifth valve 105e disposed in the third secondary pipeline 103c, and a sixth valve 105f disposed in the fourth secondary pipeline 103d, and this arrangement is convenient for adjusting the operation mode to purge the main pipe 101 by adjusting the open/close state of the valve assembly 105 under any condition, so that the switching of the main pipe 101 is not affected by the start and stop of the unit and is more flexible.
Preferably, an eleventh valve 105m is further disposed on the third pipeline 103c, the purge module 200 is disposed between the eleventh valve 105m and the fifth valve 105e, and by disposing the eleventh valve 105m, the gas in the first pipeline 103a is prevented from flowing back to the third pipeline 103c, which may cause gas leakage.
Preferably, the purging module 200 further includes a drain tank 203, and the drain tank 203 is connected to the drain pipe 201, so as to facilitate centralized treatment of the water in the drain pipe 201.
In summary, in the use process of the system, when the remaining product gas in the second main pipe 101b is purged, the first valve 105a, the second valve 105b, the sixth valve 105f and the eleventh valve 105m are closed, the third valve 105c, the fourth valve 105d and the fifth valve 105e are opened, the shut-off valve 202 in the purge module 200 connected to the third pipeline 103c is opened, gas is introduced from the gas inlet pipe 102 on one side, and since the sixth valve 105f is closed, gas can only pass through the second main pipe 101b into the third pipeline 103c, and then pass through the fifth valve 105e and the shut-off valve 202 into the water drain pipe 201, and then flow into the water drain tank 203; while purging the remaining product gas in the second header 101b, the gas introduced from the gas inlet pipe 102 on the other side enters the gas outlet pipe 104 by passing through the first secondary pipe 103a and the third valve 105c in this order all the way, and since the eleventh valve 105m is closed, the gas does not enter the third secondary pipe 103c by passing through the eleventh valve 105m, and since the eleventh valve 105m is closed, the gas enters the gas outlet pipe 104 by passing through the second secondary pipe 103b and the fourth valve 105d in this order all the way, and since the sixth valve 105f is closed, the gas does not enter the fourth secondary pipe 103d by passing through the sixth valve 105 f; the function of purging the main pipe which needs to be purged while the double-machine operation is realized.
Example 2
Referring to fig. 2, a second embodiment of the present invention, which is different from the first embodiment, is: the valve assembly 105 further includes a seventh valve 105g, an eighth valve 105h, a ninth valve 105i, a tenth valve 105l, and a twelfth valve 105 n.
Specifically, the valve assembly 105 further comprises a seventh valve 105g arranged in the first main pipe 101a, when the first main pipe 101a is purged, the seventh valve 105g can be arranged to better control the selection of the purging part of the first main pipe 101a, and the first main pipe 101a and the second main pipe 101b are switched during working without being influenced by the start and stop of a unit, so that the valve assembly is more flexible.
Preferably, the valve assembly 105 further includes an eighth valve 105h disposed in the second main pipe 101b, and when the second main pipe 101b is purged, the eighth valve 105h is disposed to better control a part of the second main pipe 101b to be purged, so that the first main pipe 101a and the second main pipe 101b are switched during operation without being affected by the start and stop of a unit, and the operation is more flexible.
Further, a ninth valve 105i is further disposed on the first secondary pipeline 103a, the purge module 200 is disposed between the ninth valve 105i and the third valve 105c, and by disposing the ninth valve 105i, the gas in the third secondary pipeline 103c is prevented from flowing back to the first secondary pipeline 103a, which may cause gas leakage.
Preferably, a tenth valve 105l is further disposed on the second secondary pipeline 103b, the purge module 200 is disposed between the tenth valve 105l and the fourth valve 105d, and by disposing the tenth valve 105l, the gas in the fourth secondary pipeline 103d is prevented from flowing back into the second secondary pipeline 103b, so as to cause gas leakage.
Preferably, a twelfth valve 105n is further disposed on the fourth pipeline 103d, the purging module 200 is disposed between the twelfth valve 105n and the sixth valve 105f, and by disposing the twelfth valve 105n, the gas in the second pipeline 103b is prevented from flowing back to the fourth pipeline 103d, so as to prevent gas leakage.
In conclusion, in the use process of the system, the purging of the main pipe needing to be purged can be realized while the double-machine operation is carried out, and the system can be combined at will, and the specific operation is as follows:
when purging the remaining product gas in the first main pipe 101a, the fourth, seventh, eighth, ninth, and tenth valves 105d, 105g, 105h, 105i, and 105l are closed, the shut-off valve 202 in the purge module 200 connected to the second sub-pipe 103b, the shut-off valve 202 in the purge module 200 connected to the third sub-pipe 103c, and the shut-off valve 202 in the purge module 200 connected to the fourth sub-pipe 103d are all closed, the first, second, third, fifth, sixth, eleventh, and twelfth valves 105a, 105b, 105c, 105e, 105f, 105m, and 105n are opened, the shut-off valve 202 in the purge module 200 connected to the first sub-pipe 103a is opened, and the gas is introduced from the gas inlet pipe 102 on one side, since the fourth valve 105d and the eighth valve 105h are closed, the gas can only pass through the first main pipe 101a into the first secondary pipeline 103a, pass through the third valve 105c and the shut-off valve 202 in sequence, enter the drain pipe 201, and then flow into the drain tank 203;
while purging the remaining product gas in the first main pipe 101a, the gas introduced from the gas inlet pipe 102 on the other side enters the third pipeline 103c through the second valve 105b, enters the gas outlet pipe 104 through the fifth valve 105e and the eleventh valve 105m in sequence, does not enter the first pipeline 103a through the ninth valve 105i because the ninth valve 105i is closed, enters the fourth pipeline 103d through the second valve 105b in sequence, enters the gas outlet pipe 104 through the sixth valve 105f and the twelfth valve 105n in sequence, and does not enter the second pipeline 103b through the fourth valve 105d and the tenth valve 105l because the fourth valve 105d and the tenth valve 105l are closed
When the remaining product gas in the second main pipe 101b is purged, the first valve 105a, the second valve 105b, the sixth valve 105f, the eleventh valve 105m, and the twelfth valve 105n are closed, the shut-off valve 202 in the purge module 200 connected to the first sub-pipe 103a, the shut-off valve 202 in the purge module 200 connected to the second sub-pipe 103b, and the shut-off valve 202 in the purge module 200 connected to the fourth sub-pipe 103d are all closed, the third valve 105c, the fourth valve 105d, the fifth valve 105e, the seventh valve 105g, the eighth valve 105h, the ninth valve 105i, and the tenth valve 105l are opened, the shut-off valve 202 in the purge module 200 connected to the third sub-pipe 103c is opened, and the gas is introduced from the gas inlet pipe 102 on one side, since the sixth valve 105f is closed, the gas can only pass through the third pipeline 103c along the second main pipe 101b, and then pass through the fifth valve 105e and the shut-off valve 202 in sequence to enter the drain pipe 201, and then flow into the drain tank 203;
while purging the remaining product gas in the second header 101b, the gas introduced from the inlet pipe 102 on the other side sequentially passes through the first sub-pipe 103a, the third valve 105c, and the ninth valve 105i all the way, and then enters the outlet pipe 104, and since the eleventh valve 105m is closed, the gas does not enter the third sub-pipe 103c through the eleventh valve 105m, and since the eleventh valve 105m is closed, the gas passes sequentially through the second sub-pipe 103b, the fourth valve 105d, and the tenth valve 105l all the way, and then enters the outlet pipe 104, and since the twelfth valve 105n and the sixth valve 105f are closed, the gas does not enter the fourth sub-pipe 103d through the twelfth valve 105n and the sixth valve 105 f.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a product gas main pipe purge system for denitration unit operation of hydrolysising which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a path module (100) including a pair of main pipes (101) connected in parallel, an intake pipe (102) disposed at both sides of the main pipes (101), a sub-pipe (103) connected to the main pipes (101), an outlet pipe (104) connected to the sub-pipe (103), and a valve assembly (105) disposed in the main pipes (101) and the sub-pipe (103); and the number of the first and second groups,
and the purging module (200) is connected with the secondary pipeline (103) and comprises a drain pipe (201) arranged on the secondary pipeline (103) and a shut-off valve (202) arranged on the drain pipe (201).
2. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in claim 1, characterized in that: the main pipe (101) comprises a first main pipe (101a) and a second main pipe (101b) connected in parallel with the first main pipe (101a), and the secondary pipeline (103) comprises a first secondary pipeline (103a) and a second secondary pipeline (103b) connected with the first main pipe (101a), and a third secondary pipeline (103c) and a fourth secondary pipeline (103d) connected with the second main pipe (101 b).
3. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in claim 2, characterized in that: the valve assembly (105) includes a first valve (105a) disposed within the first main pipe (101a), a second valve (105b) disposed within the second main pipe (101b), a third valve (105c) disposed within the first secondary conduit (103a), a fourth valve (105d) disposed within the second secondary conduit (103b), a fifth valve (105e) disposed within the third secondary conduit (103c), and a sixth valve (105f) disposed within the fourth secondary conduit (103 d).
4. The product gas main pipe purging system for the denitration hydrolysis unit in operation as set forth in claim 2 or 3, characterized in that: the valve assembly (105) further includes a seventh valve (105g) disposed within the first main pipe (101 a).
5. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in claim 4, characterized in that: the valve assembly (105) further comprises an eighth valve (105h) disposed within the second parent pipe (101 b).
6. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in claim 3, characterized in that: a ninth valve (105i) is also provided on the first secondary conduit (103a), and the purge module (200) is provided between the ninth valve (105i) and the third valve (105 c).
7. The product gas main pipe purging system for the denitration hydrolysis unit in operation as set forth in claim 3 or 6, characterized in that: a tenth valve (105l) is further arranged on the second secondary pipeline (103b), and the purging module (200) is arranged between the tenth valve (105l) and the fourth valve (105 d).
8. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in claim 7, characterized in that: an eleventh valve (105m) is further arranged on the third pipeline (103c), and the purging module (200) is arranged between the eleventh valve (105m) and the fifth valve (105 e).
9. The product gas main pipe purging system for the denitration hydrolysis unit in operation as claimed in any one of claims 3, 6 or 8, wherein: a tenth valve (105n) is further disposed on the fourth conduit (103d), and the purge module (200) is disposed between the tenth valve (105n) and the sixth valve (105 f).
10. The product gas main pipe purging system for the operation of the denitration hydrolysis unit as set forth in any one of claims 1 to 3, 5, 6 or 8, is characterized in that: the purging module (200) further comprises a drain tank (203), and the drain tank (203) is connected with the drain pipe (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121034852.4U CN215785423U (en) | 2021-05-14 | 2021-05-14 | Product gas main pipe purging system used in operation of denitration hydrolysis unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121034852.4U CN215785423U (en) | 2021-05-14 | 2021-05-14 | Product gas main pipe purging system used in operation of denitration hydrolysis unit |
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| Publication Number | Publication Date |
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| CN215785423U true CN215785423U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121034852.4U Active CN215785423U (en) | 2021-05-14 | 2021-05-14 | Product gas main pipe purging system used in operation of denitration hydrolysis unit |
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| CN (1) | CN215785423U (en) |
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2021
- 2021-05-14 CN CN202121034852.4U patent/CN215785423U/en active Active
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