MVR mainboard heat exchanger connecting structure capable of being cleaned without being detached

Abstract

The utility model relates to the technical field of mainboard heat exchangers, and particularly discloses an MVR mainboard heat exchanger connecting structure capable of being cleaned without disassembly, which comprises an evaporation kettle body, a mainboard heat exchanger, a forced circulation pump, a discharge pump, a secondary sedimentation tank, a sedimentation tank bottom valve, a valve from the discharge pump to the sedimentation tank and a valve from the discharge pump to a next process, the two ends of the main board heat exchanger are connected with the forced circulation pump and the evaporation kettle body respectively, the pipe diameter of an inlet of the main board heat exchanger reaches 400 mm + / -100 or above, an inlet of the forced circulation pump is connected to the side face of the bottom of the evaporation kettle body, and an outlet of the forced circulation pump is connected with the main board heat exchanger. Only the valve needs to be switched to enable the outlet of the discharge pump to be a sedimentation tank, and the operation is simple; a settling tank and two valves are additionally arranged, an original forced circulation pump and a discharge pump of the MVR work during cleaning, and other equipment is used; and after cleaning, sheet slag can be quickly discharged through the bottom valve, so that next cleaning is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of main board heat exchangers, and particularly relates to a connection structure of an MVR main board heat exchanger that can be cleaned without disassembly. Background Technique

[0002] The MVR technology is a mechanical vapor recompression technology, which can convert electrical energy into the internal energy of secondary steam by using a compressor, making full use of the energy of the secondary steam generated by the system itself. It has the functions of high efficiency, energy saving and steam saving, and is widely used in industries that require evaporation and concentration.

[0003] However, the fouling of the main board heat exchanger in MVR will become more and more serious during normal operation until it affects the normal operation of the MVR equipment. The traditional cleaning solution is to disassemble the main board heat exchanger after shutdown. First, special equipment is required for disassembly. Generally, the scale of the MVR main board heat exchanger is large. Each heat exchange fin is more than two meters high, more than one meter wide, and weighs dozens of kilograms. Generally, a set of main board heat exchangers has three hundred heat exchange fins, and each one needs to be manually removed and carried to an open space for physical knocking cleaning or chemical reagent flushing. Then, the pre-cleaned heat exchange fins are assembled back. A large number of sealing rubber strips will be damaged during the disassembly and assembly process, and it takes nearly ten hours for five or six workers, with a large labor intensity, seriously affecting the operation efficiency and operation cost of MVR. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a connection structure of an MVR main board heat exchanger that can be cleaned without disassembly, solving the technical problems that generally a set of main board heat exchangers has three hundred heat exchange fins, and each one needs to be manually removed and carried to an open space for physical knocking cleaning or chemical reagent flushing, and then the pre-cleaned heat exchange fins are assembled back. A large number of sealing rubber strips will be damaged during the disassembly and assembly process, and it takes nearly ten hours for five or six workers, with a large labor intensity, seriously affecting the operation efficiency and operation cost of MVR.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0006] A connection structure of an MVR main board heat exchanger that can be cleaned without disassembly, including an evaporation kettle body, a main board heat exchanger, a forced circulation pump, a discharge pump, a secondary sedimentation tank, a sedimentation tank bottom valve, a discharge pump to sedimentation tank valve, and a discharge pump to next process valve. Both ends of the main board heat exchanger are respectively connected to the forced circulation pump and the evaporation kettle body. The inlet pipe diameter of the main board heat exchanger reaches 400mm ± 100 or more. The inlet of the forced circulation pump is connected to the bottom side of the evaporation kettle body, and the outlet is connected to the main board heat exchanger. The bottom of the evaporation kettle body is conical, the apex angle of the cone is connected to the inlet of the discharge pump, and the side of the cone is connected to the inlet of the forced circulation pump.

[0007] Preferably, the evaporation kettle body, the main board heat exchanger, the forced circulation pump and the discharge pump are all connected by pipelines. The discharge pump is also connected to the sedimentation tank valve and the valve to the next process by pipelines.

[0008] Preferably, the secondary sedimentation tank is located at the top of the evaporation kettle body, and a bottom valve is arranged at the bottom of the secondary sedimentation tank.

[0009] Preferably, a detachable filter screen is arranged in the middle of the secondary sedimentation tank. An opening is provided at the top of the secondary sedimentation tank, and a pipeline is laid and connected to the evaporation kettle body.

[0010] Preferably, a tee is connected to the outlet of the discharge pump.

[0011] Preferably, the inlet of the tee is connected to the outlet of the discharge pump. One outlet is connected to the next process after passing through a valve, and the other outlet is connected to the bottom of the secondary sedimentation tank after passing through a valve and laying a pipeline.

[0012] The utility model has the following beneficial effects: This equipment does not need to disassemble the main board heat exchanger, nor does it need to disassemble the pipelines to install additional equipment. It only needs to switch the valve to make the outlet of the discharge pump lead to the sedimentation tank, and the operation is simple; A new sedimentation tank and two valves are added. During cleaning, the original forced circulation pump and discharge pump of MVR work, and other equipment; After cleaning, the plate slag can be quickly discharged through the bottom valve, which is convenient for the next cleaning. Description of the Drawings

[0013] The above description is only an overview of the technical solution of the utility model. In order to be able to understand the technical means of the utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the utility model and combines with the drawings to describe in detail as follows.

[0014] Figure 1 It is the plan view structure diagram of the utility model.

[0015] Legend: 1. Evaporation kettle body; 2. Main board heat exchanger; 3. Forced circulation pump; 4. Discharge pump; 6. Secondary sedimentation tank; 7. Sedimentation tank bottom valve; 8. Valve from the discharge pump to the sedimentation tank; 9. Valve from the discharge pump to the next process. Detailed Embodiment

[0016] By providing a connection structure for an MVR mainboard heat exchanger that can be cleaned without disassembly, the embodiments of the present application effectively solve the problem that generally, there are three hundred heat exchange fins in a group of mainboard heat exchangers. Each fin needs to be manually removed, carried to an open space, and then physically knocked for cleaning or rinsed with chemical reagents. Subsequently, the pre-cleaned heat exchange fins need to be assembled back. During the disassembly and assembly processes, a large number of sealing rubber strips will be damaged, and it takes nearly ten hours with five or six workers, resulting in a high labor intensity and seriously affecting the operating efficiency and cost of MVR. This device does not require disassembly of the mainboard heat exchanger, nor does it require disassembly of the pipeline to install additional equipment. Only by switching the valve to make the outlet of the discharge pump lead to the sedimentation tank can the operation be simple; a new sedimentation tank and two valves are added. During cleaning, the original forced circulation pump and discharge pump of MVR work, and other equipment; after cleaning, the plate slag can be quickly discharged through the bottom valve, facilitating the next cleaning. Embodiment

[0017] As Figure 1 shown, the technical solution in the embodiments of the present application effectively solves the technical problem that generally, there are three hundred heat exchange fins in a group of mainboard heat exchangers. Each fin needs to be manually removed, carried to an open space, and then physically knocked for cleaning or rinsed with chemical reagents. Subsequently, the pre-cleaned heat exchange fins need to be assembled back. During the disassembly and assembly processes, a large number of sealing rubber strips will be damaged, and it takes nearly ten hours with five or six workers, resulting in a high labor intensity and seriously affecting the operating efficiency and cost of MVR. The general idea is as follows: A connection structure for an MVR mainboard heat exchanger that can be cleaned without disassembly, including an evaporation kettle body 1, a mainboard heat exchanger 2, a forced circulation pump 3, a discharge pump 4, a secondary sedimentation tank 6, a sedimentation tank bottom valve 7, a discharge pump to sedimentation tank valve 8, and a discharge pump to next process valve 9. Both ends of the mainboard heat exchanger 2 are respectively connected to the forced circulation pump 3 and the evaporation kettle body 1. The inlet pipe diameter of the mainboard heat exchanger 2 reaches 400 mm ± 100 or more. The inlet of the forced circulation pump 3 is connected to the bottom side of the evaporation kettle body 1, and the outlet is connected to the mainboard heat exchanger 2. The bottom of the evaporation kettle body 1 is conical, the apex angle of the cone is connected to the inlet of the discharge pump 4, and the side of the cone is connected to the inlet of the forced circulation pump 3. The evaporation kettle body 1, the mainboard heat exchanger 2, the forced circulation pump 3, and the discharge pump 4 are all connected through pipelines. The discharge pump 4 is also connected to the discharge pump to sedimentation tank valve 8 and the discharge pump to next process valve 9 through pipelines. The secondary sedimentation tank 6 is located at the top of the evaporation kettle body 1. A bottom valve is provided at the bottom of the secondary sedimentation tank 6. A detachable filter screen is provided in the middle of the secondary sedimentation tank 6. An opening is provided at the top of the secondary sedimentation tank 6, and a pipeline is laid and connected to the evaporation kettle body 1. A tee is connected to the outlet of the discharge pump 4. The inlet of the tee is connected to the outlet of the discharge pump 4. One outlet is connected to the next process after passing through a valve, and the other outlet is connected to the bottom of the secondary sedimentation tank 6 after passing through a valve and laying a pipeline.

[0018] In view of the problems existing in the prior art, the utility model provides a connection structure of an MVR mainboard heat exchanger that can be cleaned without disassembly. This device does not require the disassembly of the mainboard heat exchanger, nor the disassembly of pipelines to install additional equipment. It only needs to switch the valve to make the outlet of the discharge pump lead to the sedimentation tank, and the operation is simple. A new sedimentation tank and two valves are added. During cleaning, the original forced circulation pump and discharge pump of the MVR work, and other equipment; after cleaning, the plate slag can be quickly discharged through the bottom valve, facilitating the next cleaning.

[0019] Working principle:

[0020] First step, when the mainboard heat exchanger 2 needs to be cleaned, after the working material in the evaporation kettle body 1 is emptied, the initial state of the system is: both the inside of the evaporation kettle body 1 and the inside of the secondary sedimentation tank 6 are empty, the valve 8 from the discharge pump to the sedimentation tank is open, and the valve 9 from the discharge pump to the next process is closed; at this time, chemical cleaning agent can be added into the secondary sedimentation tank 6. After it is filled, the chemical cleaning agent flows in through the overflow port under the action of gravity. After the conical area at the bottom of the evaporation kettle body 1 is filled with liquid, start the forced circulation pump 3. At this time, the chemical cleaning agent at the bottom of the evaporation kettle body 1 will be pumped into the mainboard heat exchanger 2. Under the action of the chemical cleaning agent, the structure on the plates of the mainboard heat exchanger 2 becomes soft and falls off, and flows back into the evaporation kettle body 1 along with the cleaning agent and accumulates at the bottom.

[0021] Second step, at this time, start the discharge pump 4 to pump the mixture of plate slag and chemical cleaning agent into the secondary sedimentation tank 6 located at the top of the evaporation kettle body 1. In the secondary sedimentation tank 6, most of the plate slag sinks to the bottom, and a small part suspends in the liquid. The detachable filter screen in the middle of the secondary sedimentation tank 6 filters out the suspended plate slag, and the relatively clean chemical cleaning agent overflows and flows back into the evaporation kettle body 1 to participate in the circulating cleaning again.

[0022] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present utility model, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A connection structure of an MVR main board heat exchanger that can be cleaned without disassembly, comprising an evaporation kettle body (1), a main board heat exchanger (2), a forced circulation pump (3), a discharge pump (4), a secondary sedimentation tank (6), a sedimentation tank bottom valve (7), a valve from the discharge pump to the sedimentation tank (8), and a valve from the discharge pump to the next process (9). The two ends of the main board heat exchanger (2) are respectively connected to the forced circulation pump (3) and the evaporation kettle body (1), and it is characterized in that, The inlet pipe diameter of the main board heat exchanger (2) reaches 400 mm ± 100 or more. The inlet of the forced circulation pump (3) is connected to the bottom side of the evaporation kettle body (1), and the outlet is connected to the main board heat exchanger (2). Among them, the bottom of the evaporation kettle body (1) is conical. The vertex angle of the cone is connected to the inlet of the discharge pump (4), and the side of the cone is connected to the inlet of the forced circulation pump (3).

2. The connection structure of the MVR mainboard heat exchanger that can be cleaned without disassembly according to claim 1, wherein The evaporation kettle body (1), the main board heat exchanger (2), the forced circulation pump (3) and the discharge pump (4) are all connected by pipelines. The discharge pump (4) is also connected to the sedimentation tank valve (8) and the valve to the next process (9) by pipelines.

3. The connection structure of the MVR mainboard heat exchanger that can be cleaned without disassembly according to claim 2, wherein, The secondary sedimentation tank (6) is located at the top of the evaporation kettle body (1), and a bottom valve is provided at the bottom of the secondary sedimentation tank (6).

4. The connection structure of the MVR mainboard heat exchanger that can be cleaned without disassembly according to claim 3, characterized in that A detachable filter screen is provided in the middle of the secondary sedimentation tank (6). An opening is provided at the top of the secondary sedimentation tank (6), and a pipeline is laid and connected to the evaporation kettle body (1).

5. The connection structure of the MVR mainboard heat exchanger that can be cleaned without disassembly according to claim 2, characterized in that, A tee is connected to the outlet of the discharge pump (4).

6. The connection structure of the MVR mainboard heat exchanger that can be cleaned without disassembly according to claim 5, characterized in that, The inlet of the tee is connected to the outlet of the discharge pump (4). One outlet is connected to the next process after passing through a valve, and the other outlet is connected to the bottom of the secondary sedimentation tank (6) after passing through a valve and laying a pipeline.

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