CN203744614U - Liquid ammonia conveying system of centrifugal ammonia compressor and ammonia refrigeration system - Google Patents
Liquid ammonia conveying system of centrifugal ammonia compressor and ammonia refrigeration system Download PDFInfo
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- CN203744614U CN203744614U CN201320865522.9U CN201320865522U CN203744614U CN 203744614 U CN203744614 U CN 203744614U CN 201320865522 U CN201320865522 U CN 201320865522U CN 203744614 U CN203744614 U CN 203744614U
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- ammonia
- separator
- valve
- liquefied ammonia
- surge tank
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Abstract
The utility model discloses a liquid ammonia conveying system of a centrifugal ammonia compressor. The liquid ammonia conveying system of the centrifugal ammonia compressor comprises a liquid ammonia buffer tank, the liquid ammonia buffer tank is lower than a separator horizontally, and a bottom outlet of the liquid ammonia buffer tank is connected to the front of an outlet regulating valve through a first pipe with a valve. An exhaust pipeline on the upper portion of the liquid ammonia buffer tank is connected with the upper portion of the separator through a second pipe with a valve, the upper portion of the liquid ammonia buffer tank is further connected with a gas side outlet of a cooler through a third pipe with a valve, and the middle of the liquid ammonia buffer tank is connected to the front of a shielding pump inlet through a fourth pipe with a valve. According to the liquid ammonia conveying system, due to the facts that the liquid ammonia buffer tank is provided and the liquid ammonia buffer tank is communicated with the separator, the gas side inlet of the cooler, the front of the shielding pump inlet and the front of an outlet regulating valve through the pipes respectively, when the situations that the liquid level in the separator is high and liquid ammonia in the separator cannot be conveyed to a flash tank occur, the liquid ammonia buffer tank is used for conveying the liquid ammonia in the separator to the flash tank in time, and normal and stable operation of an ammonia refrigeration system is guaranteed.
Description
Technical field
The utility model relates to a kind of liquefied ammonia conveying device, relates in particular to a kind of liquefied ammonia induction system and ammonia refrigeration system of centrifugal ammonia compressor.
Background technology
At present, in Production in Chemical Plant process, mostly use ammonia as cold-producing medium and utilize centrifugal ammonia compressor to freeze, the object of cold is provided to be reached for user.As shown in Figure 1, existing ammonia refrigeration system comprises the ammonia compressor one-level cylinder 2, ammonia compressor secondary cylinder 3, cooler 4, ammonia condenser 5, liquid ammonia storage tank 6 and the flash tank 7 that are communicated with successively.Existing ammonia refrigeration system is in the time there is fluctuation in operating mode, in gas ammonia, will carry a large amount of liquefied ammonia secretly, and liquefied ammonia enters in ammonia compressor and will cause ammonia compressor inlet flow rate meter to occur error signal, cause the misoperation of anti-surge valve, and then causing ammonia compressor inlet pressure to raise, before impact, system is normally worked.Meanwhile, while entering ammonia compressor inside due to liquefied ammonia with high velocity air, will impact compressor impeller, cause impeller to damage, cause that shake value and the displacement of ammonia compressor unit increases, and will cause that ammonia compressor unit sound part rubs when serious, damage ammonia compressor.In order to protect the normal operation of ammonia compressor, a separator 1 is set in ammonia compressor porch conventionally, the top of separator 1 is by top connecting pipe and 2 conductings of ammonia compressor one-level cylinder, the bottom of separator 1 is communicated with flash tank 7 by bottom connecting pipe, is disposed with the first valve 8, canned motor pump 9, the second valve 10, outlet regulating valve 11 and the 3rd valve 12 on the connecting pipe of bottom; Separator 1 can make gas-liquid two-phase separate, gas phase enters ammonia compressor one-level cylinder 2 from separator 1 top, and liquefied ammonia is transported to flash tank 7 through the first valve 8, canned motor pump 9, the second valve 10, outlet regulating valve 11 and the 3rd valve 12 that are arranged on separator 1 bottom successively.
The above-mentioned ammonia refrigeration system that is provided with separator 1 is in actual moving process, separator 1 bottom is to incrustation very easily between canned motor pump 9 entrances, these dirts enter pump body will jam bearing, cause canned motor pump 9 to occur not looking up and down the even situation of burn-out of bearing, cause can not in time the liquefied ammonia in separator 1 being delivered to flash tank 7 in separator 1 liquid level when high.Now, enter ammonia compressor for fear of liquefied ammonia, existing way can only reduce front operation load, reaches by reducing gas ammonia amount the object that reduces the liquefied ammonia amount of carrying secretly in gas ammonia; Then, after waiting for that liquid ammonia gasification in separator 1 completes, front operation could be recovered load.The existing ammonia compressor that is provided with separator 1 causes the system can not high load capacity stable operation, causes the cost up of system operation, seriously has influence on the production efficiency of enterprise.
Utility model content
The purpose of this utility model is to provide a kind of liquefied ammonia induction system and ammonia refrigeration system of centrifugal ammonia compressor, can ensure the normal stable operation of ammonia compressor, and then ensures systematic economy stable operation to reduce system operation cost, improves enterprises production efficiency.
The utility model adopts following technical proposals:
A kind of liquefied ammonia induction system of centrifugal ammonia compressor, comprise liquefied ammonia surge tank, the level height of liquefied ammonia surge tank is lower than the set separator in ammonia compressor porch, and the outlet at bottom of liquefied ammonia surge tank is connected to before outlet regulating valve by valvular the first pipeline is set; The exhaust line on liquefied ammonia surge tank top connects separator top by valvular second pipe is set, liquefied ammonia surge tank top also connects cooler gas side outlet by valvular the 3rd pipeline is set, and the middle part of liquefied ammonia surge tank is connected to before the first valve by valvular the 4th pipeline is set.
Described first, second, third and the 4th is provided with two valves on pipeline.
A kind of ammonia refrigeration system that adopts centrifugal ammonia compressor, comprise the separator being communicated with successively, ammonia compressor one-level cylinder, ammonia compressor secondary cylinder, cooler, ammonia condenser, liquefied ammonia storage tank and flash tank, the top of separator is by top connecting pipe and the conducting of ammonia compressor one-level cylinder, the bottom of separator is communicated with flash tank by bottom connecting pipe, on the connecting pipe of bottom, be disposed with the first valve, canned motor pump, the second valve, outlet regulating valve and the 3rd valve, also comprise liquefied ammonia surge tank, the level height of liquefied ammonia surge tank is lower than separator level height, the outlet at bottom of liquefied ammonia surge tank is connected to before outlet regulating valve by valvular the first pipeline is set, the exhaust line on liquefied ammonia surge tank top connects separator top by valvular second pipe is set, liquefied ammonia surge tank top also connects cooler gas side outlet by valvular the 3rd pipeline is set, and the middle part of liquefied ammonia surge tank is connected to before the first valve by valvular the 4th pipeline is set.
Described first, second, third and the 4th is provided with two valves on pipeline.
The utility model is by arranging liquefied ammonia surge tank, and before making liquefied ammonia surge tank be communicated with respectively separator, cooler gas side outlet, canned motor pump import by pipeline and before outlet regulating valve, can be in the time that separator occurs that liquid level is high and the liquefied ammonia in separator cannot be delivered to the situation of flash tank, utilize liquefied ammonia surge tank in time the liquefied ammonia in separator to be delivered to flash tank in time, ensure the normal stable operation of ammonia refrigeration system.
Brief description of the drawings
Fig. 1 is the structural representation of the ammonia refrigeration system of existing centrifugal ammonia compressor;
Fig. 2 is the structural representation of the ammonia refrigeration system of centrifugal ammonia compressor described in the utility model.
Detailed description of the invention
As shown in Figure 2, the ammonia refrigeration system of the centrifugal ammonia compressor of employing described in the utility model, comprise the separator 1 being communicated with successively, ammonia compressor one-level cylinder 2, ammonia compressor secondary cylinder 3, cooler 4, ammonia condenser 5, liquefied ammonia storage tank 6 and flash tank 7, the top of separator 1 is by top connecting pipe and 2 conductings of ammonia compressor one-level cylinder, the bottom of separator 1 is communicated with flash tank 7 by bottom connecting pipe, on the connecting pipe of bottom, be disposed with the first valve 8, canned motor pump 9, the second valve 10, outlet regulating valve 11 and the 3rd valve 12, the utility model has also been set up liquefied ammonia surge tank 14 on the basis of existing ammonia refrigeration system, the level height of liquefied ammonia surge tank 14 is lower than separator 1 level height, the outlet at bottom of liquefied ammonia surge tank 14 is connected to before outlet regulating valve 11 by the first pipeline that is provided with the 4th valve 21 and the 5th valve 22, the exhaust line on liquefied ammonia surge tank 14 tops is connected separator 1 top by being provided with the 6th valve 18 with the second pipe of the 7th valve 17, liquefied ammonia surge tank 14 tops are also connected cooler 4 gas side outlets by the 3rd pipeline that is provided with the 8th valve 16 and the 9th valve 15, and the middle part of liquefied ammonia surge tank 14 is connected to before the first valve 8 by the 4th pipeline that is provided with the tenth valve the 20 and the 11 valve 19.
In use, in the time that whole refrigeration system is all normally worked, the 4th valve 21 to the 11 valves 19 are all in closed condition for the utility model.In the time that separator 1 occurs that liquid level is high and the liquefied ammonia in separator 1 cannot be delivered to the situation of flash tank 7, staff carries out associative operation in the following order:
1. open the 6th valve 18 and the 7th valve 17 that on second pipe, arrange, separator 1 and liquefied ammonia surge tank 14 are communicated with, dashpot internal pressure and separator 1 internal pressure are equated;
2. open the tenth valve the 20 and the 11 valve 19 arranging on the 4th pipeline, the liquefied ammonia in separator 1 is flowed under the influence of gravity in liquefied ammonia surge tank 14, when the interior liquefied ammonia liquid level of liquefied ammonia surge tank 14 rises, reduce the liquefied ammonia liquid level in separator 1;
3. close the 6th valve 18, the 7th valve 17, the tenth valve the 20 and the 11 valve 19, and slowly open the 4th valve 21 and the 5th valve 22 that on the 8th valve 16 that arranges on the 3rd pipeline and the 9th valve 15, the first pipeline, arrange, rely on the gas pressure of cooler 4 gas side outlet place gas ammonias, by the liquefied ammonia force feed in ammonia surge tank to flash tank 7.
4. when the whole force feeds of the liquefied ammonia in ammonia surge tank are to flash tank 7, close the 8th valve 16, the 9th valve 15, the 4th valve 21 and the 5th valve 22, finish one time liquefied ammonia course of conveying.
5. repeating step 1 to 4 in the light of actual conditions, reaches the object that reduces the liquefied ammonia liquid level in separator 1.
The liquefied ammonia induction system of centrifugal ammonia compressor described in the utility model, comprise liquefied ammonia surge tank 14, the level height of liquefied ammonia surge tank 14 is lower than the set separator 1 in ammonia compressor porch, and the outlet at bottom of liquefied ammonia surge tank 14 is connected to before outlet regulating valve 11 by valvular the first pipeline is set; The exhaust line on liquefied ammonia surge tank 14 tops connects separator 1 top by valvular second pipe is set, liquefied ammonia surge tank 14 tops also connect cooler 4 gas side outlets by valvular the 3rd pipeline is set, and the middle part of liquefied ammonia surge tank 14 is connected to before the first valve 8 by valvular the 4th pipeline is set.
The operation principle of liquefied ammonia induction system described in the utility model and process are described in detail in the ammonia refrigeration system of centrifugal ammonia compressor hereinbefore, do not repeat them here.Liquefied ammonia induction system can be in the time that separator 1 occurs that liquid level is high and the liquefied ammonia in separator 1 cannot be delivered to the situation of flash tank 7, utilize liquefied ammonia surge tank 14 in time the liquefied ammonia in separator 1 to be delivered to flash tank 7 in time, ensure the normal stable operation of ammonia refrigeration system.
Claims (4)
1. the liquefied ammonia induction system of a centrifugal ammonia compressor, it is characterized in that: comprise liquefied ammonia surge tank, the level height of liquefied ammonia surge tank is lower than the set separator in ammonia compressor porch, and the outlet at bottom of liquefied ammonia surge tank is connected to before outlet regulating valve by valvular the first pipeline is set; The exhaust line on liquefied ammonia surge tank top connects separator top by valvular second pipe is set, liquefied ammonia surge tank top also connects cooler gas side outlet by valvular the 3rd pipeline is set, and the middle part of liquefied ammonia surge tank is connected to before the first valve by valvular the 4th pipeline is set.
2. the liquefied ammonia induction system of centrifugal ammonia compressor according to claim 1, is characterized in that: described first, second, third and the 4th is provided with two valves on pipeline.
3. one kind adopts the ammonia refrigeration system of centrifugal ammonia compressor, comprise the separator being communicated with successively, ammonia compressor one-level cylinder, ammonia compressor secondary cylinder, cooler, ammonia condenser, liquefied ammonia storage tank and flash tank, the top of separator is by top connecting pipe and the conducting of ammonia compressor one-level cylinder, the bottom of separator is communicated with flash tank by bottom connecting pipe, on the connecting pipe of bottom, be disposed with the first valve, canned motor pump, the second valve, outlet regulating valve and the 3rd valve, it is characterized in that: also comprise liquefied ammonia surge tank, the level height of liquefied ammonia surge tank is lower than separator level height, the outlet at bottom of liquefied ammonia surge tank is connected to before outlet regulating valve by valvular the first pipeline is set, the exhaust line on liquefied ammonia surge tank top connects separator top by valvular second pipe is set, liquefied ammonia surge tank top also connects cooler gas side outlet by valvular the 3rd pipeline is set, and the middle part of liquefied ammonia surge tank is connected to before the first valve by valvular the 4th pipeline is set.
4. the ammonia refrigeration system of the centrifugal ammonia compressor of employing according to claim 3, is characterized in that: described first, second, third and the 4th is provided with two valves on pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865522.9U CN203744614U (en) | 2013-12-26 | 2013-12-26 | Liquid ammonia conveying system of centrifugal ammonia compressor and ammonia refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320865522.9U CN203744614U (en) | 2013-12-26 | 2013-12-26 | Liquid ammonia conveying system of centrifugal ammonia compressor and ammonia refrigeration system |
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| Publication Number | Publication Date |
|---|---|
| CN203744614U true CN203744614U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320865522.9U Withdrawn - After Issue CN203744614U (en) | 2013-12-26 | 2013-12-26 | Liquid ammonia conveying system of centrifugal ammonia compressor and ammonia refrigeration system |
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| CN (1) | CN203744614U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727710A (en) * | 2013-12-26 | 2014-04-16 | 河南开祥精细化工有限公司 | Liquid ammonia transfer system, liquid ammonia transfer method and ammonia refrigeration system of centrifugal ammonia compressor |
| CN104729132A (en) * | 2015-03-23 | 2015-06-24 | 七台河宝泰隆煤化工股份有限公司 | Compression refrigeration device and method used for compression refrigeration by using same |
| CN110332094A (en) * | 2019-07-26 | 2019-10-15 | 河南开祥精细化工有限公司 | A kind of reciprocating compressor oil expeller |
-
2013
- 2013-12-26 CN CN201320865522.9U patent/CN203744614U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727710A (en) * | 2013-12-26 | 2014-04-16 | 河南开祥精细化工有限公司 | Liquid ammonia transfer system, liquid ammonia transfer method and ammonia refrigeration system of centrifugal ammonia compressor |
| CN103727710B (en) * | 2013-12-26 | 2016-05-18 | 河南开祥精细化工有限公司 | Liquefied ammonia induction system, method and the ammonia refrigeration system of centrifugal ammonia compressor |
| CN104729132A (en) * | 2015-03-23 | 2015-06-24 | 七台河宝泰隆煤化工股份有限公司 | Compression refrigeration device and method used for compression refrigeration by using same |
| CN110332094A (en) * | 2019-07-26 | 2019-10-15 | 河南开祥精细化工有限公司 | A kind of reciprocating compressor oil expeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140730 Effective date of abandoning: 20160518 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140730 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |