Refrigerating machine solution filtering device and refrigerating machine

Abstract

The embodiment of the utility model provides a refrigerating machine solution filtering device and a refrigerating machine. The refrigerating machine solution filtering device comprises a top cover, a lower shell and a filtering bag, the lower shell is a hollow cylinder with an open top; the top cover is connected with the top end of the lower shell, and the top cover further comprises a filter bag supporting ring which downwards penetrates into the inner side of the lower shell; the top opening of the filter bag sleeves the outer side of the filter bag supporting ring; the top cover body is also provided with a solution inlet, and the solution inlet is communicated with the interior of the filter bag; the lower shell is also provided with a solution outlet, and the position of the solution outlet is lower than that of the bottom end of the filter bag. According to the technical scheme, through the refrigerating machine solution filtering device, cleaning of the interior of a unit and solution precipitation regeneration can be achieved in a non-stop mode, and therefore losses caused by stop of a refrigerating machine in industrial production are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial refrigerating machine technical field especially relates to a refrigerating machine solution filter device and refrigerating machine. BACKGROUND

[0002] In many industrial production fields, for example, coking industry, refrigerating machine (for example, H type steam double effect type lithium bromide absorption refrigerating machine) is important production auxiliary equipment. H type steam double effect type lithium bromide absorption refrigerating machine operating principle is that the dilute solution in the absorber is extracted by solution pump, is heated after heat exchange through low temperature heat exchanger, condensate heat exchanger, high temperature heat exchanger and enters high pressure generator, is heated again in high pressure generator by high temperature working steam, and is concentrated into intermediate solution, and high temperature refrigerant steam is generated. After heat exchange through high temperature heat exchanger, the temperature of intermediate solution is reduced, and enters low pressure generator, is heated again in low pressure generator by high temperature refrigerant steam, and separates out refrigerant steam, and is concentrated into concentrated solution. After heat exchange through low temperature heat exchanger, the temperature of concentrated solution is reduced, and returns to the absorber and sprays. High temperature refrigerant steam generated in high pressure generator is cooled and condensed into refrigerant water in low pressure heat transfer pipe, enters condenser after throttling, and refrigerant steam generated in low pressure generator also enters condenser and is condensed into refrigerant water by cooling water, and heat is taken into the atmosphere by cooling water. Two refrigerant water streams enter evaporator after throttling through U-shaped pipe, and flow into evaporator refrigerant water tray after being cooled and reduced in evaporator. The refrigerant water in evaporator water tray is extracted by refrigerant pump and sprayed on the surface of evaporator heat transfer pipe, is boiled and evaporated by absorbing the heat of the cold water flowing through the heat transfer pipe, and becomes refrigerant steam. The generated refrigerant steam enters the absorber and is absorbed by the concentrated solution returned to the absorber. After the heat is taken away by the refrigerant water, the cold water flows out of the unit and returns to the user system. After absorbing the refrigerant steam, the concentrated solution is reduced in concentration, becomes dilute solution and is sent to high and low pressure generator again for heating and concentration. The process is continuously cycled, and the evaporator continuously produces cold water of the required temperature.

[0003] However, with the continuous operation of the refrigerating unit, iron rust and other impurities are continuously precipitated in the interior, resulting in turbidity of lithium bromide solution. Solution turbidity leads to blockage of the heat exchanger of the unit and poor absorption effect, which seriously affects the refrigeration effect, so the interior of the unit needs to be cleaned to filter out iron rust and other impurities.

[0004] In the process of realizing the utility model, the inventor finds that at least the following problems exist in the prior art:

[0005] In the prior art, the unit needs to be stopped first, then the solution in the unit is extracted, gravity sedimentation is carried out, and finally the solution is injected back into the unit, so that the interior cleaning and solution sedimentation regeneration of the unit can be completed, and in the process, the industrial production will be affected due to the suspension of the refrigerating machine. Therefore, how to complete the interior cleaning of the refrigerating machine unit without stopping is a problem to be solved. Utility Model Content

[0006] This utility model provides a solution filtration device and a refrigeration machine for cleaning the internal components of the refrigeration machine and regenerating the solution by precipitation without shutting down the machine, thereby avoiding losses caused by refrigeration machine shutdown in industrial production.

[0007] To achieve the above objectives, in one aspect, this utility model provides a refrigeration solution filtration device, including a top cover, a lower housing, and a filter bag; the lower housing is a hollow cylinder with an open top; the top cover is connected to the top of the lower housing, and the top cover also includes a filter bag support ring extending downward into the inner side of the lower housing; the top opening of the filter bag is fitted onto the outside of the filter bag support ring; the top cover body is also provided with a solution inlet, which is connected to the interior of the filter bag; the lower housing is also provided with a solution outlet, the position of which is lower than the bottom of the filter bag.

[0008] Furthermore, the top cover includes a top cover body and a filter bag support ring. The top cover body is a shell structure with an internal cavity, and the filter bag support ring is a hollow cylinder that runs vertically through the top and bottom, and the filter bag support ring communicates with the internal cavity.

[0009] Furthermore, an annular upper flange is provided at the bottom of the top cover body, and an annular lower flange is provided at the top of the lower shell. The upper flange and the lower flange are connected by bolts.

[0010] Furthermore, the top cover body is also equipped with a vacuum pump port for connecting to an external vacuum pump.

[0011] Furthermore, the top of the filter bag is connected to the filter bag support ring by a clamp.

[0012] Furthermore, a quartz sand filtration layer is also installed inside the filter bag.

[0013] Furthermore, the quartz sand filter layer is divided into a first quartz sand filter layer, a second quartz sand filter layer, and a third quartz sand filter layer from bottom to top. The quartz sand particle size in the first quartz sand filter layer is 2-4 mm, the quartz sand particle size in the second quartz sand filter layer is 4-8 mm, and the quartz sand particle size in the third quartz sand filter layer is 8-16 mm. The thickness ratio of the first, second, and third quartz sand filter layers is 1:2:3.

[0014] Furthermore, a pressure sensor is also installed inside the internal cavity.

[0015] On the other hand, this utility model embodiment also provides a refrigeration machine, including a filter pipeline connected in parallel with the refrigeration machine solution delivery pipeline. The filter pipeline includes an inlet end shut-off valve, an outlet end shut-off valve, and the refrigeration machine solution filtration device as described above. The inlet end shut-off valve is connected to the solution inlet, and the outlet end shut-off valve is connected to the solution inlet.

[0016] Further, the filter pipeline comprises a plurality of refrigerant solution filtering devices, and the plurality of refrigerant solution filtering devices are connected in series or in parallel.

[0017] The technical scheme has the following beneficial effects:

[0018] In the technical scheme, the parallel filter pipeline is connected to the existing refrigerant solution conveying pipeline, so that part of the solution is shunted to the refrigerant solution filtering device, thereby collecting rust and other impurities in the filter bag, and the internal cleaning of the unit can be completed in the daily use process; when the filter bag needs to be replaced, the refrigerant solution filtering device only needs to be turned off, and the refrigerant can still continue to run relying on the existing refrigerant solution conveying pipeline, without the need to stop, thereby avoiding the loss caused by the shutdown of the refrigerant in industrial production. For example, in the coking industry, after the refrigerant solution filtering device of the technical scheme is used, the refrigerant can filter the solution under the condition of not stopping, maintain good refrigeration effect of the refrigerant, and keep the temperature of the low-temperature water stable and up to standard (<23℃), avoid the decrease of the recovery rate of chemical products (some components such as ammonia and benzene in coal gas) and the unstable delivery of coal gas due to the over-standard temperature of the low-temperature water, and improve the recovery rate of chemical products and reduce the frequency of coke oven emission.

[0019] In addition, the technical scheme has the following characteristics:

[0020] 1. In the gravity sedimentation process of the prior art, the bottom sedimented part of the solution cannot be recycled, but after the technical scheme is used, because gravity sedimentation is not needed, the loss of refrigeration solution regeneration and the loss of liquid replacement can be effectively reduced, and the use cost of the refrigeration liquid of the refrigerant is reduced.

[0021] 2. The utility model breaks through the limited space and the environmental factors of toxic chemical agents, realizes the refrigerant pipeline cleaning and maintenance without contact, reduces the time of direct contact of workers with toxic and harmful substances, and provides equipment support for stable production. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0023] Figure 1 It is a structural schematic diagram of a refrigerant solution filtering device according to an embodiment of the utility model;

[0024] Figure 2 It is an application schematic diagram of a refrigerant solution filtering device according to an embodiment of the utility model;

[0025] Figure 3 is the schematic diagram of the series application of the plurality of refrigerant solution filtering devices in the embodiment of the present application;

[0026] Figure 4 is the schematic diagram of the parallel application of the plurality of refrigerant solution filtering devices in the embodiment of the present application;

[0027] Fig. 11 is a top cover body; 12, a vacuum air outlet; 13, a solution inlet; 14, a filter bag supporting ring; 15, an upper flange; 16, an internal cavity; 21, a lower shell; 22, a solution outlet; 23, a lower flange; 31, a filter bag; 32, a quartz sand filter layer; 41, a clamp; 42, a sealing gasket; 51, an inlet end stop valve; 52, an outlet end stop valve; 53, a vacuum pump; 54, a vacuum valve; 60, a refrigerant solution conveying pipeline. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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.

[0029] As shown in Figure 1 The embodiment of the present application provides a refrigerant solution filtering device, which comprises a top cover, a lower shell 21 and a filter bag 31. The lower shell 21 is a hollow cylinder with an open top. The top cover is connected to the top end of the lower shell 21, and the top cover further comprises a filter bag supporting ring 14 which extends downward into the inside of the lower shell 21. The filter bag 31 is arranged with an open top on the outside of the filter bag supporting ring 14. The top cover body 11 is further provided with a solution inlet 13 which is in communication with the inside of the filter bag 31. The lower shell 21 is further provided with a solution outlet 22 which is located lower than the bottom end of the filter bag 31.

[0030] To solve the foregoing problems, the technical scheme provides a refrigerant solution filtering device, which can be used in parallel with an existing refrigerant solution conveying pipeline 60 and filters the solution through a built-in filter bag 31. In the process of flowing through the filter bag 31, rust and other impurities cannot seep out due to their large particle size and are collected in the filter bag 31. Although the solution flowing through the refrigerant solution conveying pipeline 60 is not filtered, most of the impurities in the solution can enter the filtering pipeline and be filtered out by the filter bag 31 in the long-term reciprocating circulation process, so that the method can achieve good internal cleaning effect of the unit. When the filter bag 31 accumulates a large amount of impurities, in order to prevent a large resistance from affecting the normal flow of the solution, the filter bag 31 needs to be replaced. When the filter bag 31 is replaced, the solution inlet 13 and the solution outlet 22 of the refrigerant solution filtering device (for example, the solution inlet 13 is closed by an external inlet end stop valve 51) are closed, so that the solution no longer flows through the refrigerant solution filtering device. After a new filter bag 31 is replaced, the filtering device can be restored and put into use. In the process of daily use and replacement of the filter bag 31, since the refrigerant solution conveying pipeline 60 is always used normally, the internal cleaning of the refrigerant unit can be completed without stopping, thereby avoiding the loss caused by stopping of the refrigerant unit in industrial production.

[0031] The filter bag 31 is a cylindrical flexible bag structure with an open top and a bottom, and has a predetermined number of filter holes on the outer surface. The filter bag 31 is a mature product and can be made of stainless steel wire, nylon or the like. After the top of the filter bag 31 is sleeved outside the filter bag support ring 14, the top can be fixed by lashing or the like. In a specific embodiment, the number of the filter bag 31 is 10.

[0032] Further, the top cover includes a top cover body 11 and the filter bag support ring 14. To optimize the structure, the top cover body 11 is a shell structure with an internal cavity 16, and the filter bag support ring 14 is a hollow cylinder penetrating from top to bottom. The filter bag support ring 14 penetrates the internal cavity 16, that is, the entire top cover forms a hollow structure, and the solution inlet 13 and the solution outlet 22 can also be made of stainless steel pipes, which effectively reduces the weight of the top cover and is beneficial to the flow of the solution.

[0033] Further, the preferred way of connecting the top cover and the lower shell 21 is that the bottom end of the top cover body 11 is provided with an annular upper flange 15, the top end of the lower shell 21 is provided with an annular lower flange 23, and the upper flange 15 and the lower flange 23 are connected by bolts. To achieve good sealing, a sealing gasket 42 can also be laid between the upper flange 15 and the lower flange 23.

[0034] Further, in order to facilitate the internal vacuum operation, the top cover body 11 is further provided with a vacuum suction port 12 for connecting an external vacuum pump 53, and the internal vacuum of the refrigerator solution filtering device can be achieved through the vacuum pump 53 communicated with the vacuum suction port 12, and then the vacuum valve 54 is closed.

[0035] Further, in order to make the fixing of the filter bag 31 more reliable, the top of the filter bag 31 is connected with the filter bag support ring 14 through the clamp 41, and if necessary, a groove with a width greater than that of the clamp 41 can be arranged on the outer side of the filter bag support ring 14, so that the clamp 41 is located in the groove to avoid falling off.

[0036] Further, in addition to filtering through the filter holes of the filter bag 31, in order to improve the filtering effect, a quartz sand filtering layer 32 can be arranged in the filter bag 31, and the quartz sand filtering layer 32 can also have the effects of resisting impact and stabilizing the filter bag 31.

[0037] Further, the quartz sand filtering layer 32 can be multi-layered, and preferably, it is divided into a first quartz sand filtering layer, a second quartz sand filtering layer and a third quartz sand filtering layer from bottom to top, the quartz sand in the first quartz sand filtering layer has a particle size of 2-4 mm, the quartz sand in the second quartz sand filtering layer has a particle size of 4-8 mm, and the quartz sand in the third quartz sand filtering layer has a particle size of 8-16 mm, and the thickness ratio of the first quartz sand filtering layer, the second quartz sand filtering layer and the third quartz sand filtering layer is 1:2:3.

[0038] Further, in order to avoid the filter bag 31 from blocking the solution flow and to determine the replacement time, a pressure sensor can be arranged in the internal cavity 16, and the pressure sensor is electrically connected with an external control device (not shown in the figure). When the filter bag 31 is blocked by too much impurities, the resistance is increased, and the resistance of the solution flowing through the refrigerator solution filtering device is also increased. After the signal measured by the pressure sensor is fed back to the control device, the signal is displayed to the relevant personnel in the form of photoelectricity, so as to remind the replacement of the filter bag 31.

[0039] As shown in Figure 2 The utility model embodiment further provides a refrigerator, including filter pipeline in parallel with refrigerator solution delivery pipeline 60, filter pipeline includes inlet end stop valve 51, outlet end stop valve 52 and refrigerator solution filtering device as mentioned above, inlet end stop valve 51 with solution import 13 is linked together, outlet end stop valve 52 with solution import 13 is linked together.

[0040] In application, the refrigerant solution filter device should be vacuumed first, then the inlet end stop valve 51 and the outlet end stop valve 52 are opened, so that a part of the solution is diverted from the refrigerant solution conveying pipeline 60 to the filter pipeline, at this time, the solution flowing through the refrigerant solution filter device is filtered by the filter bag 31 and the quartz sand filled inside, the impurities are left in the filter bag 31, and the filtered solution flows out from the solution inlet 13 and then flows into the refrigerant solution conveying pipeline 60 and returns to the unit through the absorber. Although the solution flowing through the refrigerant solution conveying pipeline 60 is not filtered, most of the impurities in the solution can have the opportunity to enter the filter pipeline and be filtered out by the filter bag 31 in the long-term reciprocating cycle, so that the method can achieve good cleaning effect inside the unit.

[0041] When the filter bag 31 needs to be replaced due to too many impurities in the filter bag 31, the inlet end stop valve 51 and the outlet end stop valve 52 are closed first, then the bolts between the top cover and the lower shell 21 are disassembled, the clamp 41 is loosened, the old filter bag 31 is taken out, and a new filter bag 31 is replaced, then the device is restored and vacuumed, and the inlet end stop valve 51 and the outlet end stop valve 52 are opened again, so that the refrigerant solution filter device resumes use. During the replacement of the filter bag 31, since the refrigerant solution conveying pipeline 60 is in normal use, it is not necessary to stop the machine, thereby avoiding the loss caused by stopping the machine.

[0042] Further, the filter pipeline includes a plurality of refrigerant solution filter devices, and the plurality of refrigerant solution filter devices are connected in series or in parallel. Figure 3 As shown in FIG. 5, it is a schematic diagram of the series application of the plurality of refrigerant solution filter devices, at this time, the impurities in the solution can be removed to the greatest extent by the plurality of filter bags 31 in turn, and the filtering effect is improved; Figure 4 As shown in FIG. 6, it is a schematic diagram of the parallel application of the plurality of refrigerant solution filter devices, at this time, the solution in the filter pipeline can pass through the plurality of filter bags 31 in parallel, the replacement period of the filter bag 31 can be prolonged, and the maintenance workload is reduced.

[0043] In the above detailed description, various features are combined together in a single embodiment to simplify the disclosure. Such disclosure method should not be interpreted as reflecting the intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the appended claims, the utility model is in a state of less than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby incorporated into the detailed description, in which each claim is separately a preferred embodiment of the utility model.

[0044] For any person skilled in the art, various modifications of the embodiments described above will be readily apparent and the generic principles defined herein can be applied to other embodiments without departing from the spirit and scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0045] The above detailed description of the present application has been given to further explain the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific implementation of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A solution filtration device for a refrigeration machine, characterized in that, The system includes a top cover, a lower housing (21), and a filter bag (31); the lower housing (21) is a hollow cylinder with an open top; the top cover is connected to the top of the lower housing (21), and the top cover also includes a filter bag support ring (14) extending downward into the inner side of the lower housing (21); the top opening of the filter bag (31) is fitted onto the outside of the filter bag support ring (14); the top cover includes a top cover body (11), which has an internal cavity. The shell structure of (16) is such that the filter bag support ring (14) is a hollow cylinder that runs vertically through the shell and is connected to the internal cavity (16); the top cover body (11) is also provided with a solution inlet (13), which is connected to the interior of the filter bag (31); the lower shell (21) is also provided with a solution outlet (22), which is located below the bottom of the filter bag (31).

2. The refrigeration solution filtration device as described in claim 1, characterized in that, The bottom end of the top cover body (11) is provided with an annular upper flange (15), and the top end of the lower shell (21) is provided with an annular lower flange (23). The upper flange (15) and the lower flange (23) are connected by bolts.

3. The refrigeration solution filtration device as described in claim 1, characterized in that, The top cover body (11) is also provided with a vacuum extraction port (12) for connecting an external vacuum pump (53).

4. The refrigeration solution filtration device as described in claim 1, characterized in that, The top of the filter bag (31) is connected to the filter bag support ring (14) by a clamp (41).

5. The refrigeration solution filtration device as described in claim 1, characterized in that, The filter bag (31) is also provided with a quartz sand filter layer (32).

6. The refrigeration solution filtration device as described in claim 5, characterized in that, The quartz sand filter layer (32) is divided into a first quartz sand filter layer, a second quartz sand filter layer and a third quartz sand filter layer from bottom to top. The quartz sand particle size in the first quartz sand filter layer is 2-4 mm, the quartz sand particle size in the second quartz sand filter layer is 4-8 mm, and the quartz sand particle size in the third quartz sand filter layer is 8-16 mm. The thickness ratio of the first quartz sand filter layer, the second quartz sand filter layer and the third quartz sand filter layer is 1:2:

3.

7. The refrigeration solution filtration device as described in claim 1, characterized in that, A pressure sensor is also installed inside the internal cavity (16).

8. A refrigeration machine, characterized in that, The filter includes a filter line connected in parallel with the refrigeration solution delivery line (60), the filter line including an inlet shut-off valve (51), an outlet shut-off valve (52), and a refrigeration solution filtration device as described in any one of claims 1-7, wherein the inlet shut-off valve (51) is connected to the solution inlet (13), and the outlet shut-off valve (52) is connected to the solution inlet (13).

9. The refrigeration machine as described in claim 8, characterized in that, The filtration pipeline includes multiple refrigeration solution filtration devices, which are connected in series or in parallel.

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