Cooling system for air-cooled reciprocating compressor

Abstract

The utility model discloses a cooling system for an air-cooled reciprocating compressor, which comprises a lubricating oil cooler and a softened water tank, the lubricating oil cooler is connected with a lubricating oil inlet, a lubricating oil outlet, a softened water inlet and a softened water outlet, and the lubricating oil inlet is connected with an oil inlet pipeline connected with a lubricating oil tank. The lubricating oil outlet is connected with an oil outlet pipeline connected with a compressor forced lubrication component, and a circulating oil pipe is connected between the compressor forced lubrication component and the lubricating oil tank; an outlet of the softened water tank is connected with a softened water cooler through a pipeline, an outlet of the softened water cooler is connected with a compressor cooling pipeline and a lubricating oil cooling pipeline in parallel, and softened water in the compressor cooling pipeline is used for being introduced into a jacket layer of a compressor component and is introduced into the softened water tank after the compressor component is cooled; the lubricating oil cooling pipeline is connected with a softened water inlet of the lubricating oil cooler, and a water return pipeline is connected between a softened water outlet of the lubricating oil cooler and the softened water tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling system for air-cooled reciprocating compressor belongs to petroleum, chemical industry and natural gas etc. BACKGROUND

[0002] In petroleum, chemical industry, natural gas etc. chemical production device, the crankshaft and bearing of reciprocating compressor unit need to be forced lubricated by lubricating oil, a large amount of heat will be conducted to the lubricating oil and then the lubricating oil is heated, at this time, a separate cooling facility is needed to cool the lubricating oil. In addition, the cylinder and packing of reciprocating compressor will also generate a large amount of heat during the working process, at this time, the cylinder and packing need to be cooled by water-cooled jacket. Considering the particularity of the structure of the cylinder and packing, in order to avoid the phenomenon that the heat transfer efficiency is too low due to fouling and the compressor exhaust temperature is overheated, the existing technology usually adopts the way of setting independent softened water station to cool the cylinder and packing of the compressor. When the unit is located in the field with sufficient circulating water supply for the compressor unit cooling, both the lubricating oil cooler and the softened water cooler can adopt the tube-shell heat exchanger and use circulating water as refrigerant to cool and cool the lubricating oil and softened water. When the unit is located in the field with suitable climate conditions or insufficient circulating water supply, only forced air cooling can be used to cool and cool the lubricating oil and softened water, at this time, the unit needs to set two forced air cooling coolers to cool and cool the lubricating oil and lubricating water respectively.

[0003] In general, the key points of the design of the existing air-cooled reciprocating compressor cooling system are: two sets of independent lubricating oil station and softened water station are used to cool the lubricating oil and softened water respectively; forced air cooling coolers are used in the lubricating oil station and softened water station to cool and cool the high-temperature medium; in order to ensure the stability of the unit operation, the two forced air cooling coolers operate independently and do not interfere with each other.

[0004] The forced air cooling cooler has the disadvantages of large floor area, high noise, low heat transfer efficiency and high cost. In addition, since the heat transfer effect of the forced air cooling cooler is greatly affected by the environment temperature, in order to ensure the heat transfer effect, the frequency conversion method is usually used to adjust the speed of the cooling fan. Therefore, the two forced air cooling coolers also need to be equipped with frequency conversion motor and frequency converter, but this configuration not only increases the equipment investment, but also reduces the reliability of the unit operation to some extent because of the possible fault point of the frequency converter. INVENTION CONTENTS

[0005] The utility model discloses a cooling system for air-cooled reciprocating compressor, which solves the technical problem of high equipment investment and large floor area of the prior art cooling system for air-cooled reciprocating compressor.

[0006] The utility model discloses a cooling system for air-cooled reciprocating compressor, which solves the technical problem of high equipment investment and large floor area of the prior art cooling system for air-cooled reciprocating compressor.

[0007] The compressor cooling pipeline comprises a first branch pipe and a second branch pipe, the softened water in the first branch pipe is used to be introduced into the compressor packing jacket to cool the compressor packing, and the softened water in the second branch pipe is used to be introduced into the compressor cylinder jacket to cool the compressor cylinder.

[0008] The softened water cooler is a forced air-cooled cooler.

[0009] The lubricating oil cooler is a tube-shell heat exchanger.

[0010] The lubricating oil inlet and the lubricating oil outlet are connected with the tube side of the tube-shell heat exchanger, and the softened water inlet and the softened water outlet are connected with the shell side of the tube-shell heat exchanger.

[0011] A softened water pump is arranged on the pipeline between the outlet of the softened water tank and the softened water cooler.

[0012] A lubricating oil pump is arranged on the oil inlet pipeline.

[0013] The utility model discloses a beneficial effect is: the softened water first after cooling in softened water cooler, enter the jacket layer of lubricating oil cooler and compressor component respectively (such as compressor cylinder jacket and compressor packing), and the softened water is cooled to the lubricating oil that flows through lubricating oil cooler again and backflows to the softened water tank, and the softened water is cooled to the compressor component and also backflows to the softened water pipe, and the lubricating oil is cooled in lubricating oil cooler, and enters the forced lubrication component of compressor, and backflows to the lubricating oil tank again.

[0014] The utility model discloses a beneficial effect is: the softened water first after cooling in softened water cooler, enter the jacket layer of lubricating oil cooler and compressor component respectively (such as compressor cylinder jacket and compressor packing), and the softened water is cooled to the lubricating oil that flows through lubricating oil cooler again and backflows to the softened water tank, and the softened water is cooled to the compressor component and also backflows to the softened water pipe, and the lubricating oil is cooled in lubricating oil cooler, and enters the forced lubrication component of compressor, and backflows to the lubricating oil tank again.

[0015] Preferably, the lubricating oil cooler in the utility model adopts a tubular heat exchanger, which has the advantages of small floor area, no noise, high heat exchange efficiency and low cost compared with air-cooled coolers.

[0016] Preferably, the softened water cooler adopts a forced air-cooled cooler, which can adjust the speed of the cooling fan through frequency conversion and is suitable for cooling and temperature reduction of the softened water alone. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the schematic diagram of the cooling system of air-cooled reciprocating compressor of an embodiment of the utility model.

[0018] In the drawing: 1-lubricating oil tank, 2-lubricating oil pump, 3-lubricating oil cooler, 3.1-lubricating oil inlet, 3.2-lubricating oil outlet, 3.3-softened water inlet, 3.4-softened water outlet, 4-softened water tank, 5-softened water pump, 6-softened water cooler, 7-compressor cylinder jacket, 8-compressor packing jacket, 9-compressor forced lubrication component. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are explained in detail as follows, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0020] For example, Figure 1As shown, the cooling system of the air-cooled reciprocating compressor of the embodiment comprises a lubricating oil cooler 3 and a softened water tank 4, the lubricating oil cooler 3 is connected with a lubricating oil inlet 3.1, a lubricating oil outlet 3.2, and a softened water inlet 3.3 and a softened water outlet 3.4, the lubricating oil inlet 3.1 is connected with an oil inlet pipeline connected with the lubricating oil tank 1, the lubricating oil outlet 3.2 is connected with an oil outlet pipeline connected with the forced lubrication component 9 of the compressor, and a circulating oil pipeline is connected between the forced lubrication component 9 of the compressor and the lubricating oil tank 1; the outlet of the softened water tank 4 is connected with a softened water cooler 6 through a pipeline, the outlet of the softened water cooler 6 is connected in parallel with a compressor cooling pipeline and a lubricating oil cooling pipeline, the softened water in the compressor cooling pipeline is used to enter the jacket layer of the compressor component, and the softened water is used to cool the compressor component and then enter the softened water tank 4; the lubricating oil cooling pipeline is connected with the softened water inlet 3.3 of the lubricating oil cooler 3, and a backwater pipeline is connected between the softened water outlet 3.4 of the lubricating oil cooler 3 and the softened water tank 4. Figure 1 In the figure, the dashed line represents the softened water circulation system, and the solid line represents the lubricating oil circulation system.

[0021] In the embodiment, the compressor cooling pipeline comprises a first branch pipeline and a second branch pipeline, the softened water in the first branch pipeline is used to enter the compressor packing jacket 8 to cool the compressor packing, and the softened water in the second branch pipeline is used to enter the compressor cylinder jacket 7 to cool the compressor cylinder. The softened water cooler 6 is a forced air-cooled cooler.

[0022] The lubricating oil cooler 3 is a tubular heat exchanger. The lubricating oil inlet 3.1 and the lubricating oil outlet 3.2 are connected with the tube side of the tubular heat exchanger, and the softened water inlet 3.3 and the softened water outlet 3.4 are connected with the shell side of the tubular heat exchanger.

[0023] The oil inlet pipeline is provided with a lubricating oil pump 2. The pipeline between the outlet of the softened water tank 4 and the softened water cooler 6 is provided with a softened water pump 5.

[0024] A specific application case of the above embodiment: in a certain air-cooled reciprocating natural gas compressor unit, the circulating route of the lubricating oil system is: the lubricating oil from a lubricating oil tank 1 is pressurized by a lubricating oil pump 2 and then sent to the tube side of a lubricating oil cooler 3, and exchanges heat with softened water from a softened water cooler in the lubricating oil cooler 3, and the lubricating oil is cooled and temperature-adjusted by the lubricating oil cooler 3, and then sent to the forced lubrication components of the compressor (such as compressor bearings and other parts requiring forced lubrication), and then the high-temperature lubricating oil is self-flowed to the lubricating oil tank 1 through the lubricating oil pipeline. The circulating route of the softened water is: the softened water from a softened water tank 4 is pressurized by a softened water pump 5 and sent to a softened water air cooler 6, and the softened water is cooled and temperature-adjusted by the softened water air cooler 6, and then divided into three routes: the first route is used for cooling the compressor cylinder through a compressor cylinder jacket 7, and the softened water is self-flowed to the softened water tank 4 through the pipeline after being heated; the second route is used for cooling the compressor packing through a compressor packing jacket 8, and the softened water is self-flowed to the softened water tank 4 through the pipeline after being heated; and the third route is used for cooling the lubricating oil flowing through the lubricating oil cooler 3 through the lubricating oil cooler 3, and the softened water is self-flowed to the softened water tank 4 through the pipeline after being heated.

[0025] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cooling system for an air-cooled reciprocating compressor, characterized by: It includes lubricating oil cooler and softened water tank, lubricating oil cooler is connected with lubricating oil inlet, lubricating oil outlet and softened water inlet, softened water outlet, lubricating oil inlet is connected with oil inlet pipeline connected with lubricating oil tank, lubricating oil outlet is connected with the oil outlet pipeline connected with the forced lubrication part of compressor, the forced lubrication part of compressor and lubricating oil tank are connected with circulating oil pipe;The outlet of the softened water tank is connected with the softened water cooler through the pipeline, and the outlet of the softened water cooler is connected with the compressor cooling pipeline and the lubricating oil cooling pipeline in parallel, the softened water in the compressor cooling pipeline is used to enter the jacket layer of the compressor part, and the softened water is used to enter the softened water tank after cooling the compressor part;The lubricating oil cooling pipeline is connected with the softened water inlet of the lubricating oil cooler, and the softened water outlet of the lubricating oil cooler is connected with the softened water tank through the water return pipeline.

2. The cooling system for an air-cooled reciprocating compressor according to claim 1, characterized by: The compressor cooling pipeline includes first branch pipe and second branch pipe, and the softened water in the first branch pipe is used to enter the compressor packing jacket to cool the compressor packing;The softened water in the second branch pipe is used to enter the compressor cylinder jacket to cool the compressor cylinder.

3. The cooling system for an air-cooled reciprocating compressor according to claim 1, characterized by: The softened water cooler adopts forced air cooling type cooler.

4. The cooling system for an air-cooled reciprocating compressor according to claim 1, characterized by: The lubricating oil cooler adopts tube-shell heat exchanger.

5. The cooling system for an air-cooled reciprocating compressor according to claim 4, characterized by: The lubricating oil inlet, lubricating oil outlet and tube-shell heat exchanger are connected with the tube side, and the softened water inlet, softened water outlet and tube-shell heat exchanger are connected with the shell side.

6. The cooling system for an air-cooled reciprocating compressor according to claim 1, characterized by: The pipeline between the outlet of the softened water tank and the softened water cooler is provided with a softened water pump.

7. The cooling system for an air-cooled reciprocating compressor according to claim 1, characterized by: The oil inlet pipeline is provided with a lubricating oil pump.

Images