CN210773519U - Cooling water circulation system of air cooling tower - Google Patents
Cooling water circulation system of air cooling tower Download PDFInfo
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- CN210773519U CN210773519U CN201921701766.7U CN201921701766U CN210773519U CN 210773519 U CN210773519 U CN 210773519U CN 201921701766 U CN201921701766 U CN 201921701766U CN 210773519 U CN210773519 U CN 210773519U
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Abstract
The utility model relates to an air cooling tower cooling water circulating system, including the air cooling tower, the top and the bottom of air cooling tower are provided with gas outlet pipeline and circulating water return water pipeline respectively, and the exit end of circulating water supply channel and refrigerated water supply channel communicates middle part and upper portion at the air cooling tower respectively, the entrance point of circulating water supply channel and refrigerated water supply channel all communicates there is reserve water system and circulating water system. The utility model discloses a design each other's reserve water system and circulating water system, can switch at any time between the two as required, can adopt reserve water system to provide the circulating water when the circulating water goes wrong to reduce impurity and foam in air separation plant and the air cooling tower, fabulous protection follow-up molecular sieve structure and solved follow-up equipment and appear the probability that ice is stifled, guaranteed air separation plant, air cooling tower and follow-up equipment's operation safety and stability.
Description
Technical Field
The utility model relates to a cooling water circulation system, belonging to the field of chemical equipment; in particular to a cooling water circulation system of an air cooling tower.
Background
The air separation equipment is gas separation equipment for liquefying, rectifying and finally separating air into oxygen, nitrogen and other useful gases, and is called air separation equipment for short. The system mainly comprises an air compressor, an air cooling tower (air cooling tower), a turbo expander, a molecular sieve system, a fractionating tower and the like. In the process of preparing 1, 4-butyrolactone, an air separation plant is required to separate the gas used in the process of preparing 1, 4-butyrolactone or the by-product gas produced, and in the process of treating the gas by the air separation plant, the following problems exist: the gas from the air compressor enters the molecular sieve purification system after being cooled and washed by the air cooling tower, the air cooling tower uses circulating water as a cooling water source, slime, corrosion and scaling can be avoided from breeding in the system, good heat exchange between water and air can be ensured, however, the system operation is greatly influenced by the quality of the circulating water, when the quality of the circulating water goes wrong, the circulating water system only selects a bactericide which is not easy to foam, and the quality of the circulating water is controlled by strictly controlling the using amount of the bactericide and increasing the replacement and discharge of the circulating water, so that the operation control difficulty is high, and the discharge loss is large.
Meanwhile, a general 1, 4-butyrolactone preparation workshop or system basically shares a circulating water system with other processes in many cases, for example, circulating water of a 1, 4-butyrolactone preparation PTMEG (polytetramethylene ether glycol) system and the like, devices such as a heat exchanger in the PTMEG (polytetramethylene ether glycol) preparation system, such as acetylene, 1, 4-butanediol, methanol, formaldehyde, polytetramethylene ether glycol and the like, leak, a large amount of impurities containing organic matters and hydrocarbons enter the circulating water system, and harmful substances enter an air cooling tower and are brought into a molecular sieve purification system along with an air part, so that the activity of a molecular sieve is influenced, and the safe operation of a fractionating tower is threatened.
And moreover, more foams formed when a large amount of bactericides and stripping agents are added can also appear in the circulating water operation, the foams are accumulated to a certain degree in the air cooling tower after entering the air cooling tower along with the circulating water, and can be brought into a molecular sieve purification system along with air, so that the activity of the molecular sieve is reduced, carbon dioxide, moisture and the like at the outlet of the molecular sieve exceed the standard seriously, ice blockage accidents can be caused after the impurities enter a subsequent main heat exchanger and a fractionating tower, the air separation device and related devices of a subsequent system are stopped, the air separation device is stopped and heated once, the direct loss reaches tens of thousands of yuan, and the huge cost is increased undoubtedly.
Based on the above description, when the circulating water of the air separation equipment in the prior art has a problem of water quality or has more foams, the air cooling tower outlet air entrainment liquid foams and other impurities are very easy to enter a molecular sieve purification system in a post-process to cause damage of the molecular sieve, and the safe and stable operation of the air separation equipment is seriously influenced.
SUMMERY OF THE UTILITY MODEL
Based on above technical problem, the utility model provides an air cooling tower cooling water circulating system to solved in the past air separation equipment and made molecular sieve damage, follow-up equipment appear the technical problem that ice is stifled because of quality of water or foam problem.
For solving the above technical problem, the utility model discloses a technical scheme as follows:
the utility model provides an air cooling tower cooling water circulation system, includes the air cooling tower, and the top and the bottom of air cooling tower are provided with gas outlet pipeline and circulating water return water pipeline respectively, and the exit end of circulating water supply pipeline and refrigerated water supply pipeline communicates middle part and upper portion at the air cooling tower respectively, the entrance point of circulating water supply pipeline and refrigerated water supply pipeline all communicates spare water system and circulating water system.
Preferably, the circulating water supply pipeline comprises a circulating water supply regulating valve and two groups of normal temperature pump sets which are connected in parallel and are communicated with each other, the normal temperature pump set comprises a first control valve, a normal temperature water pump, a first check valve and a second control valve which are sequentially communicated, the outlet end of the second control valve is communicated with the inlet end of the circulating water supply regulating valve, the inlet end of the first control valve is communicated with the standby water system and the circulating water system, and the outlet end of the circulating water supply regulating valve is communicated with the air cooling tower.
Preferably, the chilled water supply pipeline comprises a cooling water regulating valve, two groups of cooling pump groups and a water cooling tower which are connected in parallel, the cooling pump groups are composed of a third control valve, a cooling water pump, a second check valve and a fourth control valve which are sequentially communicated, the inlet end of the water cooling tower is communicated with the standby water system and the circulating water system, the outlet end of the water cooling tower is communicated with the inlet end of the third control valve, the outlet end of the fourth control valve is communicated with the inlet end of the cooling water regulating valve, and the outlet end of the cooling water regulating valve is communicated with the air cooling tower.
Preferably, the water cooling tower is further communicated with a decontamination pipeline, a bypass pipe is further arranged between the decontamination pipeline and the gas outlet pipeline, and a bypass valve is arranged on the bypass pipe.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: the utility model discloses a design each other's reserve water system and circulating water system, can switch at any time between the two as required, can adopt reserve water system to provide the circulating water when the circulating water goes wrong to reduce impurity and foam in air separation plant and the air cooling tower, fabulous protection follow-up molecular sieve structure and solved follow-up equipment and appear the probability that ice is stifled, guaranteed air separation plant, air cooling tower and follow-up equipment's operation safety and stability.
Drawings
Fig. 1 is a schematic structural view of the present invention;
the reference numerals in the drawings denote: 1. an air cooling tower; 2. a circulating water return pipeline; 3. a gas outlet line; 4. a cooling water regulating valve; 5. a circulating water supply regulating valve; 6. a second control valve; 7. a first check valve; 8. a normal temperature water pump; 9. a first control valve; 10. a chilled water supply line; 11. a fourth control valve; 12. a second check valve; 13. a cooling water pump; 14. a third control valve; 15. a circulating water supply line; 16. a water cooling tower; 17. a bypass valve; 18. a bypass pipe; 19. a decontamination pipeline; 20. a standby water system; 21. a circulating water system.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Examples
As shown in fig. 1, the present embodiment provides an air cooling tower cooling water circulation system, including an air cooling tower 1, the top and the bottom of the air cooling tower 1 are respectively provided with a gas outlet pipeline 3 and a circulating water return pipeline 2, the outlet ends of a circulating water supply pipeline 15 and a chilled water supply pipeline 10 are respectively communicated with the middle part and the upper part of the air cooling tower 1, and the inlet ends of the circulating water supply pipeline 15 and the chilled water supply pipeline 10 are both communicated with a standby water system 20 and a circulating water system 21.
The air compressor is connected in order to get into required gas to the 1 entrance connection air cooling tower of this embodiment, the junction can set up the control valve and control, gas outlet pipeline 3 is with the gas outgoing after cooling and washing, the combustion gas then gets into molecular sieve purification system, circulating water supply pipeline 15 provides the normal atmospheric temperature water source for 1 lower part of air cooling tower, purify the gas, freezing water supply pipeline 10 then provides the refrigerated water and cools down to the gas after the washing, the liquid after final washing and the cooling then passes through circulating water return water pipeline 2 discharge air cooling tower, let in circulating water system 21 once more after handling through circulating water treatment system, carry out circulating water supply once more through circulating water system 21. In this embodiment, all communicate at the entrance point of circulating water supply pipeline 15 and refrigerated water supply pipeline 10 has reserve water system 20, reserve water system 20 is independent respectively with circulating water system 21, quality of water variation in circulating water system 21, when a large amount of foams appear in air cooling tower 1, can close circulating water system 21 supplies water, open reserve water system 20 and supply water, thereby can effectively solve 1 export air entrainment liquid foam of air cooling tower and other impurity, make follow-up molecular sieve etc. can not damage or the stifled accident of ice appears, air separation plant has not only been protected, air cooling tower, follow-up equipment such as molecular sieve, the while still need not to stop air separation plant, parking loss has been reduced, the cost is reduced.
By adopting the scheme of the embodiment, due to the addition of the standby water system 20, the strict requirement of the circulating water system 21 on the water quality is also reduced, the water quality of the circulating water can be directly controlled according to the normal index, the treatment cost of the circulating water is greatly reduced, and the water source used by the standby water enters the circulating water again for circulation, so that the cost is not increased and the waste is not caused.
Specifically, the circulating water supply pipeline 15 comprises a circulating water supply regulating valve 5 and two groups of parallel normal temperature pump sets which are communicated with each other, the normal temperature pump set comprises a first control valve 9, a normal temperature water pump 8, a first check valve 7 and a second control valve 6 which are communicated in sequence, the outlet end of the second control valve 6 is communicated with the inlet end of the circulating water supply regulating valve 5, the inlet end of the first control valve 9 is communicated with a standby water system 20 and a circulating water system 21, and the outlet end of the circulating water supply regulating valve 5 is communicated with the air cooling tower 1. Spare water system 20 or circulating water system 21 loops through first control valve 9, normal atmospheric temperature water pump 8, first check valve 7, second control valve 6 and circulating water supply governing valve 5 input the water source of normal atmospheric temperature to air cooling tower 1 middle part, take away impurity absorption in the air, water velocity and switching in the steerable pipeline of first control valve 9 and second control valve 6 set up two sets of normal atmospheric temperature pump groups that connect in parallel, be convenient for in one of them group trouble shooting process, another group can continue to work, need not the air cooling tower and stop, guarantee air separation plant and continue to work.
Specifically, the chilled water supply pipeline 10 comprises a cooling water regulating valve 4, two groups of cooling pump groups connected in parallel and a water cooling tower 16, wherein the cooling pump groups are composed of a third control valve 14, a cooling water pump 13, a second check valve 12 and a fourth control valve 11 which are sequentially communicated, the inlet end of the water cooling tower 16 is communicated with a standby water system 20 and a circulating water system 21, the outlet end of the water cooling tower 16 is communicated with the inlet end of the third control valve 14, the outlet end of the fourth control valve 11 is communicated with the inlet end of the cooling water regulating valve 4, and the outlet end of the cooling water regulating valve 4 is communicated with the air cooling tower 1. The spare water system 20 or the circulating water system 21 sequentially passes through the water cooling tower 16, the third control valve 14, the cooling water pump 13, the second check valve 12, the fourth control valve 11 and the cooling water adjusting valve 4 to input the water source cooled by the water cooling tower 16 to the middle part of the air cooling tower 1 to cool the air in the air cooling tower 1, the third control valve 14 and the fourth control valve 11 can control the flow rate and the opening and closing of water in pipelines, two groups of cooling pump groups connected in parallel are arranged, so that in the process of fault maintenance of one group, the other group can continuously work without stopping the air cooling tower, and the air separation device is ensured to continuously work.
The water cooling tower 16 is also connected with a decontamination pipeline 19, a bypass pipe 18 is arranged between the decontamination pipeline 19 and the gas outlet pipeline 3, and the bypass pipe 18 is provided with a bypass valve 17. The decontamination pipeline 19 can discharge dirt, impurities, nitrogen and the like in the water cooling tower 16 and the gas outlet pipeline 3 for treatment, so that the cleanness of the whole system and the purity of the gas treated by the air cooling tower are ensured, and the treatment quality of the whole system is improved.
Finally, the pipelines of the water cooling tower 16 communicating with the spare water system 20 and the circulating water system 21 are preferably provided with regulating valves for regulating the water inflow and flow rate, and the pipelines of the spare water system 20 and the circulating water system 21 connecting with the chilled water supply pipeline 10 and the circulating water supply pipeline 15 can be added with cut-off valves for switching the water supply between the spare water system 20 and the circulating water system 21 at any time.
The above is the embodiment of the present invention. The foregoing is the preferred embodiments of the present invention, and if the preferred embodiments in the preferred embodiments are not obviously contradictory or are based on a certain preferred embodiment, the preferred embodiments can be combined and used by any superposition, the specific parameters in the embodiments and examples are only for the purpose of clearly expressing the utility model verification process of the utility model, and are not used for limiting the patent protection scope of the present invention, the patent protection scope of the present invention is still based on the claims, and all the equivalent structural changes made by the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an air cooling tower cooling water circulation system, its characterized in that, includes the air cooling tower, and the top and the bottom of air cooling tower are provided with gas outlet pipeline and circulating water return water pipeline respectively, and the exit end of circulating water supply pipeline and refrigerated water supply pipeline communicates middle part and upper portion at the air cooling tower respectively, the entrance point of circulating water supply pipeline and refrigerated water supply pipeline all communicates spare water system and circulating water system.
2. The cooling water circulation system of the air cooling tower according to claim 1, wherein the circulating water supply pipeline comprises a circulating water supply regulating valve and two sets of normal temperature pump sets connected in parallel, the normal temperature pump set comprises a first control valve, a normal temperature water pump, a first check valve and a second control valve which are sequentially connected, an outlet end of the second control valve is communicated with an inlet end of the circulating water supply regulating valve, an inlet end of the first control valve is communicated with the standby water system and the circulating water system, and an outlet end of the circulating water supply regulating valve is communicated with the air cooling tower.
3. The air cooling tower cooling water circulation system according to claim 1, wherein the chilled water supply pipeline comprises a chilled water regulating valve, two sets of cooling pump sets and a water cooling tower which are connected in parallel, the cooling pump sets are composed of a third control valve, a cooling water pump, a second check valve and a fourth control valve which are sequentially connected, an inlet end of the water cooling tower is communicated with the standby water system and the circulating water system, an outlet end of the water cooling tower is communicated with an inlet end of the third control valve, an outlet end of the fourth control valve is communicated with an inlet end of the chilled water regulating valve, and an outlet end of the chilled water regulating valve is communicated with the air cooling tower.
4. The air cooling tower cooling water circulation system according to claim 3, wherein the water cooling tower is further communicated with a decontamination pipeline, a bypass pipe is further arranged between the decontamination pipeline and the gas outlet pipeline, and a bypass valve is arranged on the bypass pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921701766.7U CN210773519U (en) | 2019-10-12 | 2019-10-12 | Cooling water circulation system of air cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921701766.7U CN210773519U (en) | 2019-10-12 | 2019-10-12 | Cooling water circulation system of air cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210773519U true CN210773519U (en) | 2020-06-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921701766.7U Expired - Fee Related CN210773519U (en) | 2019-10-12 | 2019-10-12 | Cooling water circulation system of air cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210773519U (en) |
-
2019
- 2019-10-12 CN CN201921701766.7U patent/CN210773519U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 Termination date: 20201012 |