Ice-cooling type energy-saving vacuumizing system for urea device

Abstract

The utility model discloses an ice-cooling type energy-saving vacuumizing system for a urea device, which comprises a cold water tower, a refrigerating unit, a heat preservation water tank and an ice cooler, the cold water tower is respectively connected with a cold water inlet and a cold water outlet of the refrigerating unit through a cold water inlet pipe and a cold water outlet pipe, and a cooling water pump is arranged on the cold water inlet pipe. A freezing inlet and a freezing outlet of the freezing unit are connected with the heat preservation water tank through a freezing water inlet pipe and a freezing water outlet pipe respectively, and a freezing water pump is arranged on the freezing water inlet pipe. One end of the ice cooler is connected with a process pipeline, one end of the ice cooler is connected with a steam pipeline, one end of the ice cooler is connected with a process exhaust pipe, and the process exhaust pipe is provided with a vacuum pump; the ice-cooling system is adopted, an original steam vacuumizing system is abandoned, the vacuum pump can be directly adopted, steam consumption and sewage discharge are greatly reduced, and the effects of energy conservation and emission reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ice cold vacuum system technical field for urea device especially relates to a kind of ice cold type energy-saving vacuum system for urea device. BACKGROUND

[0002] With the development of urea chemical industry, while obtaining high-quality products, it is required to reduce energy consumption, and reducing investment cost and operating cost has become the trend of current urea chemical industry vacuum system.

[0003] At present, most of the vacuum extraction methods in the urea chemical industry mainly use full-steam jet vacuum pump vacuum system, and the steam consumption of this vacuum extraction method is still very large, causing a very large energy waste. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies existing in the above problems, the utility model provides an ice cold type energy-saving vacuum system for urea device.

[0005] To achieve the above purpose, the utility model provides an ice cold type energy-saving vacuum system for urea device, which comprises a cold water tower, a refrigeration unit, a heat preservation water tank and an ice cooling machine, the cold water tower is connected with the cold water inlet and the cold water outlet of the refrigeration unit through cold water inlet pipe and cold water outlet pipe, and a cooling water pump is arranged on the cold water inlet pipe, the refrigeration inlet and the refrigeration outlet of the refrigeration unit are connected with the heat preservation water tank through refrigeration water inlet pipe and refrigeration water outlet pipe, and a refrigeration water pump is arranged on the refrigeration water inlet pipe.

[0006] Among them, one end of the ice cooling machine is connected with process pipeline, one end is connected with steam pipeline, one end is connected with process exhaust pipe, and a vacuum pump is arranged on the process exhaust pipe, one end is connected with the heat preservation water tank through water inlet pipe, one end is connected with the heat preservation water tank through water outlet pipe, and a circulating pump is arranged on the water inlet pipe.

[0007] Preferably, it further comprises a standby ice cooling machine.

[0008] Preferably, a first water inlet gate valve is arranged on the cold water inlet pipe, and a first water outlet gate valve is arranged on the cold water outlet pipe.

[0009] Preferably, a second water inlet gate valve is arranged on the refrigeration water inlet pipe, and a second water outlet gate valve is arranged on the refrigeration water outlet pipe.

[0010] Preferably, the heat preservation water tank and the cold water tower are respectively connected with water supplement pipe.

[0011] Preferably, an air inlet electric butterfly valve is arranged on the process pipeline, an electric stop valve is arranged on the steam pipeline, a water inlet valve is arranged on the water inlet pipe, and a water outlet valve is arranged on the water outlet pipe.

[0012] Preferably, the ice cooling machine is connected with a blowdown pipe, and the blowdown pipe is provided with a blowdown valve.

[0013] Preferably, the process exhaust pipe is provided with an exhaust electric valve.

[0014] Preferably, the ice cooling machine is provided with a condensate discharge pipe.

[0015] Compared with the prior art, the ice cooling system of the urea device of the present application has the advantages that:

[0016] The ice cooling system of the present application adopts a vacuum pump, greatly reduces the consumption of steam and the discharge of sewage, and plays a role in energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the ice cooling type energy-saving vacuum system of the urea device of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production. Figure 1 The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0022] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production. Figure 1 The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0023] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0024] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0025] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0026] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0027] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0028] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0029] The utility model discloses an ice cold type energy-saving vacuum system for urea device, and belongs to the field of urea production.

[0030] The cooling water pump 13 is started, the refrigerant solution in the heat preservation water tank 3 is sent into the refrigerating unit 2 through the cooling water pump 13, and the refrigerating unit 2 is started, after refrigeration, the refrigerant solution returns to the heat preservation water tank 3 through the refrigerating water pipe;

[0031] When the temperature of the refrigerant solution in the heat preservation water tank 3 reaches-25 degrees, the circulating water pump is started, the refrigerant solution is sent from the heat preservation water tank 3 into the ice cooling machine 4 through the circulating water pump;

[0032] At this time, the ice cooling machine 4 enters a working state, the refrigerant solution passing through the ice cooling machine 4 returns to the heat preservation water tank 3 through the water outlet pipe 11, and the circulation is realized;

[0033] After the ice cooling machine 4 enters the working state, the vacuum pump 16 can be started, and the inlet electric butterfly valve of the ice cooling machine 4 and the outlet electric butterfly valve of the exhaust port are started, so that the process gas enters the ice cooling machine 4;

[0034] After the process gas passes through the ice cooling machine 4, the water vapor in the process gas is frozen into ice by the ice cooling machine 4, and the air and non-condensable gas that are not frozen enter the vacuum pump 16 through the process exhaust pipe 17 and are pumped out through the vacuum pump 16, so that the purpose of system vacuumization is achieved;

[0035] When the vacuum system runs for a certain period of time (generally 12 hours), the ice in the ice cooling machine 4 becomes thicker and thicker, the heat exchange pipe in the ice cooling machine 4 is gradually blocked, and the system vacuum is reduced, so the next step is to stop the ice cooling machine 4 and put the standby ice cooling machine into use;

[0036] The standby ice cooling machine and the ice cooling machine 4 are connected through pipes and valves to realize replacement between the two;

[0037] The inlet electric butterfly valve of the ice cooling machine 4 and the outlet electric butterfly valve of the exhaust port are closed, the water inlet valve is also closed, that is, the process inlet and outlet pipes of the ice cooling machine 4 are cut off, and the water inlet is cut off, then the steam electric stop valve of the steam pipe of the ice cooling machine 4 is opened, the ice in the ice cooling machine 4 is broken, the water after the ice is broken is discharged through the condensate pipe, and when all the water vapor in the condensate pipe is water vapor, it is indicated that the ice breaking is completed, and the electric stop valve can be closed;

[0038] The ice cooling machine 4 and the standby ice cooling machine are alternately and circularly worked.

[0039] The above is only a preferred embodiment of the utility model, and is not used for limiting the utility model, and the utility model can be variously changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An ice-cooled energy-saving vacuum-pumping system for a urea plant, characterized in that, The cold water tower is connected with the cold water inlet and outlet of the refrigerating unit through the cold water inlet pipe and the cold water outlet pipe, and the cold water pump is arranged on the cold water inlet pipe. The ice cooling machine is connected with the process pipeline, the steam pipeline, the process exhaust pipeline, the water inlet pipe and the water outlet pipe.

2. The ice-cooled energy-saving vacuum-pumping system for urea plant according to claim 1, characterized in that, The cold water inlet pipe is provided with the first water inlet gate valve, and the cold water outlet pipe is provided with the first water outlet gate valve.

3. The ice-cooled energy-saving vacuum-pumping system for urea plant according to claim 2, wherein The refrigerating water inlet pipe is provided with the second water inlet gate valve, and the refrigerating water outlet pipe is provided with the second water outlet gate valve.

4. The ice-cooled energy-saving vacuum-pumping system for urea plant according to claim 3, wherein The water tank and the cold water tower are connected with the water supplement pipe.

5. The ice-cooled energy-saving vacuum-pumping system for urea plant as claimed in claim 4, wherein, The process pipeline is provided with the air inlet electric butterfly valve, the steam pipeline is provided with the electric stop valve, the water inlet pipe is provided with the water inlet valve, and the water outlet pipe is provided with the water outlet valve.

6. The ice-cooled energy-saving vacuum-pumping system for urea plant according to claim 5, wherein The ice cooling machine is provided with the blowdown pipe, and the blowdown valve is arranged on the blowdown pipe.

7. The ice-cooled energy-saving vacuum-pumping system for urea plant as claimed in claim 6, wherein, The ice cooling machine is provided with the condensate discharge pipe.

8. The ice-cooled energy-saving vacuum-pumping system for urea plant according to claim 7, wherein, ​ 9. The ice-cooled energy-saving vacuum-pumping system for urea plant as claimed in claim 8, wherein, ​

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