Automatic cleaning equipment for MVR evaporator

Abstract

The invention discloses automatic cleaning equipment for an MVR (mechanical vapor recompression) evaporator, which comprises the MVR evaporator, the MVR evaporator comprises an evaporator tank body and a heating assembly, the evaporator tank body comprises a first heating chamber and a first evaporation chamber, and the lower end of the first heating chamber is connected with the lower end of the first evaporation chamber through a first connecting pipe; the heating assembly comprises a first compressor and a plurality of first heating plates, and the first heating plates are arranged in the first heating chamber; the cleaning assembly comprises a cleaning acid liquid tank and a first liquid feeding pump, one end of the first liquid feeding pump is connected with the cleaning acid liquid tank, a first feeding pipe is arranged at the lower end of the first connecting pipe, and the other end of the first liquid feeding pump is connected with the first feeding pipe; and the detection assembly is arranged in the first heating chamber. According to the automatic cleaning equipment for the MVR evaporator, the cleaning acid liquid can be automatically pumped into the MVR evaporator, the time for pickling and dirt removal is automatically adjusted, discharging of the cleaning acid liquid is automatically adjusted, and the automatic cleaning equipment is safer and more reliable.

Description

Technical Field

[0001] The invention belongs to the field of cleaning equipment, and in particular relates to automatic cleaning equipment for an MVR evaporator. Background Art

[0002] The MVR system, full name "Mechanical Vapor Recompression" system, is a new type of high-efficiency and energy-saving evaporation equipment. The MVR system is driven by electric energy, and uses the secondary steam and its energy generated by the evaporation of the material itself, which is compressed by the steam compressor to increase the enthalpy of the secondary steam, and then sent to the heating chamber as a heating heat source, thereby reducing the demand for external energy. However, since evaporation and concentration uses heat to evaporate the solution, it is easy to generate a lot of dirt inside. If it cannot be handled in time, it will affect the evaporation efficiency of the MVR evaporator. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides an automatic cleaning device for an MVR evaporator.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An automatic cleaning device for an MVR evaporator, comprising:

[0006] An MVR evaporator, the MVR evaporator comprising an evaporator tank body and a heating assembly, the evaporator tank body comprising a first heating chamber and a first evaporation chamber, the first heating chamber being arranged at the lower left end of the first evaporation chamber, the lower end of the first heating chamber and the lower end of the first evaporation chamber being connected via a first connecting pipe, the upper end of the first heating chamber and the middle part of the left end of the first evaporation chamber being connected via a second connecting pipe; a heating assembly, the heating assembly comprising a first compressor and a plurality of first heating plates, the first heating plate being arranged in the first heating chamber, the upper end of the first heating plate passing through the first heating chamber being provided with a first steam inlet, the first steam inlet and the upper end of the first evaporation chamber being connected via a third connecting pipe, and the first compressor being arranged on the third connecting pipe;

[0007] A cleaning component, the cleaning component comprising a cleaning acid tank and a first liquid feeding pump, the cleaning acid tank is arranged on one side of the evaporator tank body, one end of the first liquid feeding pump is connected to the cleaning acid tank, a first feed pipe is arranged at the lower end of the first connecting pipe, and the other end of the first liquid feeding pump is connected to the first feed pipe;

[0008] A detection component is arranged in the first heating chamber.

[0009] Furthermore, the detection component includes a first acidity meter, a first hydrometer and a main controller, the first acidity meter is arranged in the first heating chamber, the first hydrometer is arranged at the lower end of the first heating chamber, and the first acidity meter and the first hydrometer are both electrically connected to the main controller.

[0010] Furthermore, a first discharge pipe is provided at the lower end of the first connecting pipe, a first electric valve is provided at the lower end of the first discharge pipe, and the first electric valve is electrically connected to the main controller.

[0011] Furthermore, the cleaning method of the MVR evaporator automatic cleaning device comprises the following steps:

[0012] Step S1: draining all the solution in the evaporator tank, and the first liquid delivery pump pumps the cleaning acid in the cleaning acid tank into the evaporator tank, so that the cleaning acid pumped into the evaporator tank covers the first heating plate;

[0013] Step S2: the first acidity meter detects the acidity of the cleaning acid in the first heating chamber and transmits the acidity signal to the main controller, the first hydrometer detects the density of the bottom of the first heating chamber and transmits the density signal to the main controller, and the main controller receives the acidity signal and the density signal;

[0014] Step S3: the main controller generates an acidity curve and a density curve from the received acidity signal and density signal, divides the acidity curve and the density curve into a plurality of acidity segments and density segments according to time periods, and calculates the change rate of each acidity segment and density segment;

[0015] Step S4: comparing the change rates of each acidity segment and density segment with the set acidity comparison change rate and density comparison change rate respectively;

[0016] When the change rate of the acidity segment is lower than the acidity contrast change rate, or the change rate of the density segment is lower than the density contrast change rate, the first electric valve opens to discharge the cleaning acid solution.

[0017] Furthermore, the step S4 comprises the following steps:

[0018] Step S4.1: When the time for the cleaning acid to be pumped into the evaporator tank does not reach the preset time, and the change rate of the acidity segment is lower than the acidity contrast change rate, or the change rate of the density segment is lower than the density contrast change rate, the first electric valve is opened to discharge the cleaning acid;

[0019] Step S4.2: When the time for the cleaning acid liquid to be pumped into the evaporator tank reaches a preset time, the first electric valve is opened to discharge the cleaning acid liquid.

[0020] The invention discloses an automatic cleaning device for an MVR evaporator. Compared with the prior art, the invention has the beneficial effect that the device can automatically pump cleaning acid into the MVR evaporator, automatically adjust the time for acid washing to remove dirt, and automatically adjust the discharge of the cleaning acid. While processing dirt, the device also protects the first heating plate, and is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a preferred embodiment provided by the present invention.

[0022] Figure 2 It is a structural schematic diagram of an MVR evaporator according to a preferred embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the cleaning principle of a preferred embodiment provided by the present invention.

[0024] The reference numerals include: 110, first evaporation chamber; 120, first heating chamber; 130, first heating plate; 210, first connecting pipe; 211, first feed pipe; 212, first discharge pipe; 213, first electric valve; 220, second connecting pipe; 230, Disana connecting pipe; 231, first compressor; 310, first acidity meter; 320, first hydrometer; 330, cleaning acid tank; 340, first liquid delivery pump. DETAILED DESCRIPTION

[0025] The present invention discloses an automatic cleaning device for an MVR evaporator. The specific implementation of the present invention will be further described below in conjunction with a preferred embodiment.

[0026] See attached figure Figure 1-3 , Figure 1 is a schematic structural diagram of a preferred embodiment provided by the present invention, Figure 2 : is a structural schematic diagram of an MVR evaporator of a preferred embodiment provided by the present invention, Figure 3 It is a schematic diagram of the cleaning principle of a preferred embodiment provided by the present invention.

[0027] Preferred embodiments.

[0028] This embodiment provides an MVR evaporator automatic cleaning device, including:

[0029] An MVR evaporator, the MVR evaporator comprising an evaporator tank and a heating assembly, the evaporator tank comprising a first heating chamber 120 and a first evaporation chamber 110, the first heating chamber 120 being arranged at the lower left end of the first evaporation chamber 110, the lower end of the first heating chamber 120 and the lower end of the first evaporation chamber 110 being connected via a first connecting pipe 210, the upper end of the first heating chamber 120 and the middle of the left end of the first evaporation chamber 110 being connected via a second connecting pipe 220; a heating assembly, the heating assembly comprising a first compressor 231 and a plurality of first heating plates 130, the first heating plates 130 being arranged in the first heating chamber 120, the upper end of the first heating plates 130 being provided with a first steam inlet through the first heating chamber 120, the first steam inlet and the upper end of the first evaporation chamber 110 being connected via a third connecting pipe, the first compressor 231 being arranged on the third connecting pipe;

[0030] A cleaning component, the cleaning component includes a cleaning acid tank 330 and a first liquid feeding pump 340, the cleaning acid tank 330 is arranged on one side of the evaporator tank body, one end of the first liquid feeding pump 340 is connected to the cleaning acid tank 330, the lower end of the first connecting pipe 210 is provided with a first feeding pipe 211, and the other end of the first liquid feeding pump 340 is connected to the first feeding pipe 211;

[0031] A detection component is disposed in the first heating chamber 120 .

[0032] Furthermore, the detection component includes a first acidity meter 310, a first hydrometer 320 and a main controller, the first acidity meter 310 is arranged in the first heating chamber 120, the first hydrometer 320 is arranged at the lower end of the first heating chamber 120, and the first acidity meter 310 and the first hydrometer 320 are both electrically connected to the main controller.

[0033] Furthermore, a first discharge pipe 212 is provided at the lower end of the first connecting pipe 210 , a first electric valve 213 is provided at the lower end of the first discharge pipe 212 , and the first electric valve 213 is electrically connected to the main controller.

[0034] Furthermore, the cleaning method of the MVR evaporator automatic cleaning device comprises the following steps:

[0035] Step S1: drain all the solution in the evaporator tank, and the first liquid delivery pump 340 pumps the cleaning acid in the cleaning acid tank 330 into the evaporator tank, so that the cleaning acid pumped into the evaporator tank covers the first heating plate 130;

[0036] Step S2: the first acidity meter 310 detects the acidity of the cleaning acid in the first heating chamber 120 and transmits the acidity signal to the main controller, the first hydrometer 320 detects the density at the bottom of the first heating chamber 120 and transmits the density signal to the main controller, and the main controller receives the acidity signal and the density signal;

[0037] Step S3: the main controller generates an acidity curve and a density curve from the received acidity signal and density signal, divides the acidity curve and the density curve into a plurality of acidity segments and density segments according to time periods, and calculates the change rate of each acidity segment and density segment;

[0038] Step S4: comparing the change rates of each acidity segment and density segment with the set acidity comparison change rate and density comparison change rate respectively;

[0039] When the change rate of the acidity segment is lower than the acidity contrast change rate, or when the change rate of the density segment is lower than the density contrast change rate, the first electric valve 213 opens to discharge the cleaning acid solution.

[0040] Furthermore, the step S4 comprises the following steps:

[0041] Step S4.1: When the time for the cleaning acid to be pumped into the evaporator tank does not reach the preset time, and the change rate of the acidity segment is lower than the acidity contrast change rate, or the change rate of the density segment is lower than the density contrast change rate, the first electric valve 213 is opened to discharge the cleaning acid;

[0042] Step S4.2: When the time for the cleaning acid liquid to be pumped into the evaporator tank reaches a preset time, the first electric valve 213 is opened to discharge the cleaning acid liquid.

[0043] The acidity curve and density curve are divided into several acidity segments and density segments according to 10-20 minutes as a time period. For example, 15 minutes is used as a time period, and the time period is divided into several acidity segments and density segments. The test result at the end of the time period is subtracted from the test result at the front end of the time period, and then divided by the test result at the front end of the time period to obtain the acidity change rate and density change rate of the time period, and compared with the set acidity contrast change rate and density contrast change rate. When the acidity change rate or density change rate of the time period is lower than the set acidity contrast change rate or density contrast change rate, it means that the dirt treatment effect is not obvious, that is, the remaining dirt is relatively small or even no, therefore, the cleaning acid solution needs to be discharged immediately to prevent the cleaning acid solution from corroding the first heating plate 130. When the acidity change rate or density change rate in this time period is higher than the set acidity contrast change rate or density contrast change rate, it means that the dirt treatment effect is more obvious, that is, the remaining dirt is relatively large, so there is no need to discharge the cleaning acid; however, if the acidity change rate or density change rate is always higher than the set acidity contrast change rate or density contrast change rate within the set time, the cleaning acid also needs to be discharged to avoid excessive pickling and corrosion of the first heating plate 130.

[0044] It is worth mentioning that the technical features such as the first compressor 231 involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional selection in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0045] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic cleaning device for MVR evaporator, characterized in that: include: An MVR evaporator, the MVR evaporator comprising an evaporator tank and a heating assembly, the evaporator tank comprising a first heating chamber (120) and a first evaporation chamber (110), the first heating chamber (120) being arranged at the lower left end of the first evaporation chamber (110), the lower end of the first heating chamber (120) and the lower end of the first evaporation chamber (110) being connected via a first connecting pipe (210), the upper end of the first heating chamber (120) and the middle part of the left end of the first evaporation chamber (110) being connected via a second connecting pipe (220); a heating assembly, the heating assembly comprising a first compressor (231) and a plurality of first heating plates (130), the first heating plate (130) being arranged in the first heating chamber (120), the upper end of the first heating plate (130) passing through the first heating chamber (120) being provided with a first steam inlet, the first steam inlet and the upper end of the first evaporation chamber (110) being connected via a third connecting pipe, the first compressor (231) being arranged on the third connecting pipe; A cleaning component, the cleaning component comprising a cleaning acid liquid tank (330) and a first liquid delivery pump (340), the cleaning acid liquid tank (330) being arranged on one side of the evaporator tank body, one end of the first liquid delivery pump (340) being connected to the cleaning acid liquid tank (330), a first feed pipe (211) being arranged at the lower end of the first connecting pipe (210), and the other end of the first liquid delivery pump (340) being connected to the first feed pipe (211); A detection component is arranged in the first heating chamber (120).

2. The MVR evaporator automatic cleaning equipment according to claim 1, characterized in that: The detection component comprises a first acidity meter (310), a first hydrometer (320) and a main controller, wherein the first acidity meter (310) is arranged in the first heating chamber (120), the first hydrometer (320) is arranged at the lower end of the first heating chamber (120), and the first acidity meter (310) and the first hydrometer (320) are both electrically connected to the main controller.

3. The MVR evaporator automatic cleaning equipment according to claim 2, characterized in that: A first discharge pipe (212) is provided at the lower end of the first connecting pipe (210), and a first electric valve (213) is provided at the lower end of the first discharge pipe (212), and the first electric valve (213) is electrically connected to the main controller.

4. The MVR evaporator automatic cleaning equipment according to claim 3, characterized in that: The cleaning method of the MVR evaporator automatic cleaning device comprises the following steps: Step S1: draining all the solution in the evaporator tank, and using the first liquid delivery pump (340) to pump the cleaning acid in the cleaning acid tank (330) into the evaporator tank, so that the cleaning acid pumped into the evaporator tank covers the first heating plate (130); Step S2: the first acidity meter (310) detects the acidity of the cleaning acid solution in the first heating chamber (120) and transmits the acidity signal to the main controller, the first hydrometer (320) detects the density of the bottom of the first heating chamber (120) and transmits the density signal to the main controller, and the main controller receives the acidity signal and the density signal; Step S3: the main controller generates an acidity curve and a density curve from the received acidity signal and density signal, divides the acidity curve and the density curve into a plurality of acidity segments and density segments according to time periods, and calculates the change rate of each acidity segment and density segment; Step S4: comparing the change rates of each acidity segment and density segment with the set acidity comparison change rate and density comparison change rate respectively; When the change rate of the acidity segment is lower than the acidity contrast change rate, or when the change rate of the density segment is lower than the density contrast change rate, the first electric valve (213) opens to discharge the cleaning acid solution.

5. The MVR evaporator automatic cleaning equipment according to claim 4, characterized in that: The step S4 comprises the following steps: Step S4.1: when the time for the cleaning acid liquid to be pumped into the evaporator tank body does not reach the preset time, and the change rate of the acidity segment is lower than the acidity contrast change rate, or the change rate of the density segment is lower than the density contrast change rate, the first electric valve (213) is opened to discharge the cleaning acid liquid; Step S4.2: When the time for the cleaning acid liquid to be pumped into the evaporator tank reaches a preset time, the first electric valve (213) is opened to discharge the cleaning acid liquid.

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