Refrigeration cycle system of ammonia compressor
By introducing high-temperature, high-pressure ammonia gas from the ammonia compressor outlet into the ammonia collection tank to evaporate liquid ammonia in the ammonia refrigeration unit process, the problem of high foundation design for the liquid ammonia collection tank is solved, the frequency of use of the shielded pump and the risk of equipment damage are reduced, and costs are lowered.
Patent Information
- Application Number
- CN202423084693.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In the existing ammonia refrigeration unit process, the liquid ammonia collection tank requires a high foundation design to avoid cavitation of the canned pump, which leads to high plant manufacturing costs and easy damage to the canned pump bearings. Insufficient cooling also affects production.
High-temperature and high-pressure ammonia gas from the outlet of the ammonia compressor is introduced to the liquid ammonia collection tank to evaporate the liquid ammonia. Through the design of the ammonia evaporation pipeline and the opening, the frequency of use of the shielded pump is reduced, and the liquid ammonia is directly evaporated using high-temperature and high-pressure ammonia gas.
This reduces the frequency of use of the canned pump, avoids equipment damage, reduces costs, and ensures production continuity.
Smart Images
Figure CN223525340U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to refrigeration technical field especially relates to a kind of ammonia compressor refrigeration cycle system. BACKGROUND
[0002] In the current ammonia ice machine unit process of chemical industry, when liquid ammonia appears in the inlet separator, it is usually discharged to the liquid ammonia collection tank first, then the liquid ammonia in the liquid ammonia collection tank is transported to the liquid ammonia buffer tank using a canned pump, and finally delivered to the user. Due to the NPSH of the canned pump, the foundation of the liquid ammonia collection tank needs to be made very high, which increases the manufacturing cost of the entire plant. The bearings of the canned pump are cooled by liquid ammonia, so when the pressure is low, the vaporization temperature of the liquid ammonia is also low. Therefore, the cooling is often not timely, the canned pump bearings are directly burned out, the equipment cost is increased, and the production is affected. SUMMARY
[0003] The utility model aims at providing a kind of ammonia compressor refrigeration cycle system, introduce ammonia compressor outlet high temperature high pressure ammonia gas into liquid ammonia collection tank evaporation liquid ammonia, reduce the use frequency of canned pump.
[0004] To achieve the above purpose, the technical scheme of the utility model is as follows: an ammonia compressor refrigeration cycle system, comprising a separator, an ammonia compressor, a condenser, a liquid ammonia collection tank, a canned pump, a liquid ammonia buffer tank and an ammonia evaporation pipeline, the first inlet of the separator is connected with a user end, the first outlet of the separator is connected with the inlet of the ammonia compressor, the outlet of the ammonia compressor is connected with the inlet of the condenser, and the outlet of the condenser is connected with the liquid ammonia buffer tank; the second outlet and the second inlet of the separator are respectively connected with the first inlet and the first outlet of the liquid ammonia collection tank; the second outlet of the separator and the first inlet of the liquid ammonia collection tank are used to discharge the liquid ammonia in the separator into the liquid ammonia collection tank; the first outlet of the liquid ammonia collection tank is used to introduce the ammonia gas in the liquid ammonia collection tank into the separator; the second outlet of the liquid ammonia collection tank is connected with the inlet of the canned pump, and the outlet of the canned pump is connected with the second inlet of the liquid ammonia buffer tank; the outlet of the ammonia compressor is connected with an ammonia evaporation pipeline, and the ammonia evaporation pipeline can pass through the second inlet of the liquid ammonia collection tank and enter the liquid ammonia collection tank.
[0005] Further, a first valve is arranged on the ammonia evaporation pipeline.
[0006] Further, a second valve is arranged between the second outlet of the separator and the first inlet of the liquid ammonia collection tank, and a third valve is arranged between the second inlet of the separator and the first outlet of the liquid ammonia collection tank.
[0007] Further, two groups of canned pumps are connected in parallel with the second outlet of the liquid ammonia collection tank, and the outlets of the two groups of canned pumps are connected with the second inlet of the liquid ammonia buffer tank after converging.
[0008] Further, the part of the ammonia evaporation pipeline extending into the liquid ammonia collection tank is provided with an opening.
[0009] Further, the circumference of the part of the ammonia evaporation pipeline extending into the liquid ammonia collection tank is provided with a plurality of groups of openings.
[0010] The working principle of the technical solution is that:
[0011] 1. The ammonia gas from the user ammonia cooler enters the separator for separation, and then enters the ammonia compressor for compression. The high-temperature and high-pressure gas is cooled into liquid ammonia by the condenser and then enters the liquid ammonia buffer tank, and then is delivered to the user.
[0012] 2. Generally, no liquid ammonia enters the separator in the entire cycle, but sometimes the front device of the user fails, or the ammonia injection valve is opened due to the need for unit anti-surge, which will cause liquid ammonia to appear in the separator. At this time, the liquid ammonia needs to be discharged to the liquid ammonia collection tank and timely delivered to the liquid ammonia buffer tank by the shield pump or the liquid ammonia in the liquid ammonia collection tank is removed by other means.
[0013] 3. After adding an ammonia evaporation pipeline, the high-temperature and high-pressure ammonia gas at the outlet of the ammonia compressor can be directly introduced into the liquid ammonia collection tank to evaporate the liquid ammonia in the liquid ammonia collection tank, and the generated ammonia gas also enters the separator, which does not affect the entire refrigeration process. A first valve is arranged on the ammonia evaporation pipeline, and the valve can be opened when ammonia evaporation is needed. The length of the pipeline inside the liquid ammonia collection tank can be maximized, and a plurality of groups of openings are arranged on the circumference of the ammonia evaporation pipeline to improve the heat exchange speed and quickly evaporate the liquid ammonia. In actual application, the diameter of the ammonia evaporation pipeline can be selected according to the volume of the liquid ammonia collection tank and the ideal ammonia evaporation time of the user.
[0014] The technical solution has the beneficial effects that: the high-temperature and high-pressure ammonia gas at the outlet of the compressor is directly introduced into the liquid ammonia collection tank to evaporate the liquid ammonia by using one pipeline, only a small amount of cost is needed, and the liquid ammonia can be directly evaporated most of the time; the use frequency of the shield pump is reduced to avoid damage, and the shield pump can be used as the last liquid discharge means for emergency. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a principle diagram of the ammonia compressor refrigeration cycle system.
[0016] Figure 2 It is a structure diagram of the liquid ammonia collection tank.
[0017] Figure 3 It is a structure diagram of the liquid ammonia collection tank. Figure 2 It is a sectional view of A-A. DETAILED DESCRIPTION
[0018] Further details will be described below through specific embodiments:
[0019] The reference signs in the drawings of the specification include: separator 1, ammonia compressor 2, condenser 3, liquid ammonia collection tank 4, liquid ammonia buffer tank 5, shield pump 6, ammonia evaporation pipeline 7, opening 8.
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0021] The embodiments are basically as shown in the accompanying drawings: Figures 1-3 An ammonia compressor refrigeration cycle system includes a separator 1, an ammonia compressor 2, a condenser 3, a liquid ammonia collection tank 4, a shield pump 6, a liquid ammonia buffer tank 5, and an ammonia evaporation pipeline 7. The first inlet of the separator 1 is connected with a user end, and the first outlet at the top of the separator 1 is connected with the inlet of the ammonia compressor 2. The outlet of the ammonia compressor 2 is connected with the inlet of the condenser 3, and the outlet of the condenser 3 is connected with the liquid ammonia buffer tank 5. The second outlet and the second inlet of the separator 1 are respectively connected with the first inlet and the first outlet of the liquid ammonia collection tank 4. A second valve is arranged between the second outlet of the separator 1 and the first inlet of the liquid ammonia collection tank 4, and a third valve is arranged between the second inlet of the separator 1 and the first outlet of the liquid ammonia collection tank 4. The first valve and the second valve are one-way valves. The second outlet of the separator 1 and the first inlet of the liquid ammonia collection tank 4 are used to discharge the liquid ammonia in the separator 1 into the liquid ammonia collection tank 4. The first outlet of the liquid ammonia collection tank 4 and the second inlet of the separator 1 are used to guide the ammonia gas in the liquid ammonia collection tank 4 into the separator 1. The second outlet of the liquid ammonia collection tank 4 is connected with the inlet of the shield pump 6, and the outlet of the shield pump 6 is connected with the second inlet of the liquid ammonia buffer tank 5. Specifically, the second outlet of the liquid ammonia collection tank 4 is connected in parallel with two groups of shield pumps 6, and the outlets of the two groups of shield pumps 6 are connected with the second inlet of the liquid ammonia buffer tank 5 after being merged. Figure 2 As shown in FIG. 2, the outlet of the ammonia compressor 2 is connected with the ammonia evaporation pipeline 7, the ammonia evaporation pipeline 7 can pass through the second inlet of the liquid ammonia collection tank 4 and enter the liquid ammonia collection tank 4, and a sealing element is arranged between the ammonia evaporation pipeline 7 and the second inlet. Figure 3 As shown in FIG. 3, the part of the ammonia evaporation pipeline 7 extending into the liquid ammonia collection tank 4 is provided with a plurality of groups of openings 8. A first valve is arranged on the ammonia evaporation pipeline 7, which can be a manual valve or a pneumatic valve.
[0022] The specific implementation process is as follows:
[0023] 1. Ammonia from user ammonia cooler enters separator 1 for separation, then enters ammonia compressor 2 for compression, high-temperature and high-pressure gas is cooled into liquid ammonia by condenser 3, then enters liquid ammonia buffer tank 5, and then is delivered to the user.
[0024] 2. Generally, no liquid ammonia enters separator 1 in the entire cycle, but sometimes the front device of the user fails, or the anti-surge of the unit needs to be opened, which will cause liquid ammonia to appear in separator 1, at this time, the liquid ammonia needs to be discharged to liquid ammonia collection tank 4 and timely delivered to liquid ammonia buffer tank 5 by shield pump 6 or the liquid ammonia in liquid ammonia collection tank 4 is removed by other means.
[0025] 3. After adding an ammonia evaporation pipeline 7, high-temperature and high-pressure ammonia gas at the outlet of ammonia compressor 2 can be directly introduced into liquid ammonia collection tank 4, and the liquid ammonia in liquid ammonia collection tank 4 is directly evaporated to generate ammonia gas, which also enters separator 1, without affecting the entire refrigeration process. A first valve is arranged on ammonia evaporation pipeline 7, which can be opened when ammonia evaporation is needed. The length of the pipeline inside liquid ammonia collection tank 4 can be maximized, and multiple groups of openings 8 are arranged on the circumference of ammonia evaporation pipeline 7 to improve the heat exchange speed and quickly evaporate the liquid ammonia. In actual application, the diameter of ammonia evaporation pipeline 7 can be selected according to the volume of liquid ammonia collection tank 4 and the ideal ammonia evaporation time of the user.
[0026] It should be noted that in this text, relational terms such as first and second are used merely to distinguish one entity or action from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.
[0027] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled person in the art can improve and implement the present scheme under the enlightenment given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that for the skilled person in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.
Claims
1. An ammonia compressor refrigeration cycle system characterized by: The application relates to an ammonia separation device, which comprises a separator (1), an ammonia compressor (2), a condenser (3), a liquid ammonia collecting tank (4), a shielding pump (6), a liquid ammonia buffer tank (5) and an ammonia evaporation pipeline (7), wherein the first inlet of the separator (1) is connected with a user end, the first outlet of the separator (1) is connected with the inlet of the ammonia compressor (2), the outlet of the ammonia compressor (2) is connected with the inlet of the condenser (3), and the outlet of the condenser (3) is connected with the liquid ammonia buffer tank (5); the second outlet and the second inlet of the separator (1) are respectively connected with the first inlet and the first outlet of the liquid ammonia collecting tank (4); the second outlet of the separator (1) and the first inlet of the liquid ammonia collecting tank (4) are used for discharging liquid ammonia in the separator (1) into the liquid ammonia collecting tank (4); the first outlet of the liquid ammonia collecting tank (4) is connected with the second inlet of the separator (1) and is used for guiding ammonia gas in the liquid ammonia collecting tank (4) into the separator (1); the second outlet of the liquid ammonia collecting tank (4) is connected with the inlet of the shielding pump (6), and the outlet of the shielding pump (6) is connected with the second inlet of the liquid ammonia buffer tank (5); the outlet of the ammonia compressor (2) is connected with the ammonia evaporation pipeline (7), and the ammonia evaporation pipeline (7) can pass through the second inlet of the liquid ammonia collecting tank (4) and enter the liquid ammonia collecting tank (4).
2. An ammonia compressor refrigeration cycle system as claimed in claim 1, wherein: A first valve is arranged on the ammonia evaporation pipeline (7).
3. An ammonia compression refrigeration cycle system as claimed in claim 1, wherein: A second valve is arranged between the second outlet of the separator (1) and the first inlet of the liquid ammonia collecting tank (4), and a third valve is arranged between the second inlet of the separator (1) and the first outlet of the liquid ammonia collecting tank (4).
4. An ammonia compressor refrigeration cycle system as claimed in claim 1, wherein: The second outlet of the liquid ammonia collecting tank (4) is connected with two groups of shielding pumps (6) in parallel, and the outlets of the two groups of shielding pumps (6) are connected with the second inlet of the liquid ammonia buffer tank (5) after being merged.
5. An ammonia compression refrigeration cycle system as claimed in claim 1, wherein: The part of the ammonia evaporation pipeline (7) extending into the liquid ammonia collecting tank (4) is provided with an opening (8).
6. An ammonia compression refrigeration cycle system as claimed in claim 5, wherein: The circumferential part of the part of the ammonia evaporation pipeline (7) extending into the liquid ammonia collecting tank (4) is provided with a plurality of openings (8).