Steam washing device for MVR (Mechanical Vapor Recompression) evaporator

Abstract

The utility model relates to the technical field of evaporators, and discloses a steam washing device for an MVR evaporator, which comprises a liquid distribution plate, the liquid distribution plate is arranged above tubes in the MVR evaporator, liquid distribution holes are arranged on the liquid distribution plate, the liquid distribution holes correspond to the tubes on a pore plate in position, a washing pipe is arranged above the liquid distribution plate, and the washing pipe is communicated with the liquid distribution plate. And the flushing pipe is used for conveying steam to the position above the liquid distribution plate. According to the scheme, drinking water is shunted through the liquid distribution plate and the liquid distribution holes, and the shunted drinking water enters the corresponding tube nest, so that the drinking water is uniformly distributed in the tube nest, and the cleaning effect of residual liquid medicine in the tube nest is better; residual liquid medicine in the tube nests is further cleaned through steam, and the cleaning effect of the tube nests is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator technical field, concretely relates to a steam flushing device for MVR evaporator. BACKGROUND

[0002] MVR evaporator is a kind of efficient evaporation equipment, is widely used in chemical industry, pharmacy, food industry etc. Its core feature is in through compressor recycling and reuse steam, thereby significantly reduce energy consumption.

[0003] MVR evaporator includes shell, the top of shell is equipped with feed pipe, feed pipe lower is equipped with heating chamber, heating chamber is equipped with orifice plate and installs the tube bundle on orifice plate, the bottom orifice plate lower is equipped with concentrated liquid collection chamber, concentrated liquid collection chamber is connected with discharge pipe and gas-liquid separation chamber. MVR evaporator works, make the tube bundle inside form negative pressure, facilitate the evaporation concentration of liquid, the gas and liquid in the tube bundle will enter into gas-liquid separation chamber under the action of negative pressure and separate. After each batch production, adopt drinking water to heat forced circulation to clean the residue liquid medicine of tube bundle, however, when flushing with water, due to the number of tube bundle is more and dense, there is the condition of drinking water uneven distribution, and then lead to the residue liquid medicine of partial tube bundle cleaning not thoroughly, and the cleaning effect is poor. UTILITY MODEL CONTENTS

[0004] The utility model intends to provide steam flushing device for MVR evaporator to solve the current tube bundle and lead to the residue liquid medicine of tube bundle cleaning effect poor problem because of cleaning drinking water uneven distribution.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: steam flushing device for MVR evaporator, it includes: liquid distribution plate, the liquid distribution plate is arranged above the tube bundle in MVR evaporator, the liquid distribution plate is equipped with liquid distribution hole, the liquid distribution hole corresponds with the position of the tube bundle on orifice plate, and the liquid distribution plate is equipped with flushing pipe above, and the flushing pipe is used to deliver steam to the liquid distribution plate above.

[0006] The principle of the scheme is as follows: drinking water is added from the top of MVR evaporator, and the drinking water enters the liquid distribution hole along the surface of the liquid distribution plate, and then the drinking water is evenly distributed by the liquid distribution plate and enters the tube bundle to clean the residue on the inner wall of the tube bundle. After the drinking water is flushed, steam is added into the MVR evaporator through the flushing pipe, and the steam passes through the liquid distribution plate to flush the tube bundle. The liquid distribution plate is hollow, the bottom of the liquid distribution plate is provided with an air outlet, and the side and / or top of the liquid distribution plate is provided with an air inlet. The liquid distribution plate and the liquid distribution hole thereon will affect the steam passing through the liquid distribution plate. By providing the air inlet and the air outlet on the liquid distribution plate, the influence of the liquid distribution plate on the steam flow speed is reduced. At the same time, the steam is evenly distributed to the tube bundle by using the hollow structure of the liquid distribution plate and the air outlet, and the cleaning effect of the tube bundle is better.

[0007] The scheme has the advantages that: the drinking water is shunted through the liquid distribution plate and the liquid distribution hole, and the shunted drinking water enters the corresponding column pipe, so that the drinking water is uniformly distributed in the column pipe, and the column pipe residue cleaning effect of the liquid is better; the steam temperature is higher than the drinking water temperature, and the column pipe residue liquid is further cleaned by the steam, so that the cleaning effect of the column pipe is ensured.

[0008] Preferably, the air inlets are uniformly distributed on the side surface and / or the top surface of the liquid distribution plate.

[0009] Preferably, the top surface air inlets are arranged in a staggered manner with the bottom air outlets. The steam entering the liquid distribution plate is directly discharged from the bottom air outlet, so that the steam is distributed and diffused in the liquid distribution plate, steam is discharged from each air outlet as much as possible, and the cleaning effect of each column pipe is ensured.

[0010] Preferably, the air outlet is provided with a spray head, and the spray head is provided with an adjusting valve for adjusting the size of the spray head nozzle.

[0011] Preferably, a preset interval is left between the bottom of the liquid distribution plate and the top of the column pipe. The interval is left to prevent liquid in the liquid distribution hole from overflowing from the edge thereof, to ensure that the liquid directly enters the column pipe, and in addition, the steam can fill the space between the two, so that the steam enters each column pipe, and the column pipe scale cleaning effect is better.

[0012] Preferably, the flushing pipe is in communication with the air inlets of the liquid distribution plate. In this way, the steam can quickly enter the flushing pipe, and the speed of the steam entering the column pipe is accelerated.

[0013] Preferably, the flushing pipe is in communication with the gas outlet of the gas-liquid separator. The high-temperature steam of the gas-liquid separator is further utilized, the cleaning effect of the high-temperature steam is better, and resources are saved.

[0014] Preferably, the liquid distribution plate is at least one, and the liquid distribution plates are uniformly distributed above the column pipes. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of an embodiment of the utility model.

[0016] Figure 2 It is a local structural schematic view of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The following will be further described in detail through specific embodiments:

[0018] The reference signs in the drawings of the specification include: a shell 1, a heating chamber 2, a column pipe 3, a concentrated liquid collection chamber 4, a liquid distribution plate 5, a liquid distribution hole 6, an air outlet 7.

[0019] Embodiment:

[0020] MVR evaporator steam flushing device, as attached Figure 1 and attached Figure 2 As shown, the MVR evaporator comprises a liquid distribution plate 5, which is positioned within the MVR evaporator housing 1, specifically above the tube array 3 in the heating chamber 3. The plate is removably secured to the inner wall of the MVR evaporator using bolts or screws. The plate's shape is the same as the orifice plate in the MVR evaporator—both are circular. Both the plate and the orifice plate are made of the same material: 304 or 316L stainless steel, which offers excellent corrosion resistance and high temperature resistance, making it suitable for handling a variety of chemicals. The material of the plate can also be selected based on the actual chemical solution being produced.

[0021] Liquid distribution holes 6 are provided on the liquid distribution plate 5, corresponding to the positions of the tubes 3 on the orifice plate. Drinking water is added to the top of the MVR evaporator and flows along the surface of the liquid distribution plate 5 into the liquid distribution holes 6. The drinking water is evenly distributed by the liquid distribution plate 5 and then enters the tubes 3 to clean the residue on the inner walls of the tubes 3. The drinking water is divided by the liquid distribution plate 5 and the liquid distribution holes 6, and then enters the corresponding tubes 3, ensuring that the drinking water is evenly distributed throughout the tubes 3. Residue in the tubes 3 is flushed into the concentrate collection chamber 4 at the bottom of the MVR evaporator, improving the cleaning effect of the residual liquid in the tubes 3.

[0022] A flushing pipe (not shown) is installed above the liquid distribution plate 5. This pipe is used to transport steam to the top of the liquid distribution plate 5. After the drinking water is flushed, steam is added to the MVR evaporator through the flushing pipe. The steam passes through the liquid distribution plate 5 to flush the tubes 3, further cleaning the residual liquid in the tubes 3 and ensuring the cleaning effect.

[0023] The flushing pipe is connected to the gas outlet of the gas-liquid separator. This allows the high-temperature steam from the gas-liquid separator to be further utilized, achieving a better cleaning effect and saving resources. A valve is also installed on the flushing pipe to facilitate the control of the steam discharge from the flushing pipe into the MVR evaporator.

[0024] It also includes a steam compressor, a gas-liquid separator, a steam compressor and a flushing pipe which are connected in sequence. The steam is further compressed by the steam compressor to increase the steam pressure, thereby achieving a better cleaning effect on the residual liquid in the tube array 3.

[0025] The liquid distribution plate 5 is at least one, and the liquid distribution plate 5 is uniformly distributed above the column tube 3. The liquid distribution plate 5 is hollow inside, and the bottom of the liquid distribution plate 5 is provided with an exhaust port 7, and the side and / or top of the liquid distribution plate 5 is provided with an air inlet, which is uniformly distributed on the side and / or top of the liquid distribution plate 5. The liquid distribution plate 5 and the liquid distribution hole 6 thereon will affect the steam passing through the liquid distribution plate 5, and by providing the air inlet and the exhaust port 7 on the liquid distribution plate 5, the influence of the liquid distribution plate 5 on the steam flow speed is reduced; at the same time, the hollow structure of the liquid distribution plate 5 and the exhaust port 7 are used to shunt the steam, so that the steam is uniformly distributed into the column tube 3, and the cleaning effect of the column tube 3 is better.

[0026] The flushing pipe is communicated with the air inlet of the liquid distribution plate 5. In this way, the steam can quickly enter the flushing pipe, and the speed of the steam entering the column tube 3 is accelerated.

[0027] The top air inlet is arranged in a staggered manner with the bottom exhaust port 7. Avoiding the steam entering the liquid distribution plate 5 directly from the bottom exhaust port 7, the steam is distributed and diffused in the liquid distribution plate 5, and as much as possible, each exhaust port 7 has steam exhaust, which guarantees the cleaning effect of each column tube 3.

[0028] The exhaust port 7 is provided with a spray head, and the spray head is provided with an adjusting valve for adjusting the size of the spray head nozzle.

[0029] A predetermined distance is left between the bottom of the liquid distribution plate 5 and the top of the column tube 3. The distance is left to avoid the liquid in the liquid distribution hole 6 overflowing from the edge thereof, to ensure that the liquid directly enters the column tube 3, and in addition, the steam can fill the space between the two, so that the steam enters each column tube 3, and the cleaning effect of the column tube 3 is better.

[0030] The specific implementation process is as follows:

[0031] First, the gas-liquid separator, the steam compressor and the flushing pipe are sequentially communicated, the drinking water is added from the top of the MVR evaporator, the drinking water enters the liquid distribution hole 6 along the surface of the liquid distribution plate 5, the drinking water is uniformly shunted by the liquid distribution plate 5, and then enters the column tube 3 to clean the residue on the inner wall of the column tube 3. After the flushing of the drinking water is completed, the valve on the flushing pipe is opened, the high-temperature steam separated by the gas-liquid separator is compressed by the steam compressor, and then enters the flushing pipe, the steam in the flushing pipe enters the column tube 3 through the air inlet and the exhaust port 7 of the liquid distribution plate 5, and the high-temperature steam flushes the column tube 3, improving the cleaning effect of the column tube 3. Of course, the high-temperature steam flushing can be superimposed with the drinking water flushing, so that the steam discharged from the exhaust port 7 can drive the drinking water to impact and loosen the scale softened by high temperature on the inner wall of the column tube, thereby significantly improving the cleaning effect of the scale.

[0032] The scheme guarantees the cleaning effect of the column tube 3 by preliminary cleaning of the drinking water and further cleaning of the column tube 3 residue liquid by steam; the drinking water is shunted by the liquid distribution plate 5 and the liquid distribution hole 6, and then enters the corresponding column tube 3, so that the drinking water is uniformly distributed in the column tube 3, and the cleaning effect of the column tube 3 residue liquid is better; the high-temperature steam of the gas-liquid separator is further utilized, and the cleaning effect of the high-temperature steam is better, and resources are saved.

[0033] The above is only an embodiment of the present application, and the well-known specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be noted that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, and in the present application, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances. The scope of protection claimed in the present application shall be subject to the content of the claims, and the specific embodiments and the like in the specification can be used to explain the content of the claims.

Claims

1. Steam flushing device for MVR evaporators, characterized in that The application relates to an MVR evaporator, which comprises the following parts: A liquid distribution plate is arranged above the column tube in the MVR evaporator, the liquid distribution plate is provided with liquid distribution holes corresponding to the positions of the column tube on the hole plate, a flushing pipe is arranged above the liquid distribution plate, the flushing pipe is used for conveying steam to the position above the liquid distribution plate, the inside of the liquid distribution plate is hollow, the bottom of the liquid distribution plate is provided with an exhaust port, and the side and / or top of the liquid distribution plate is provided with an air inlet.

2. The steam flush apparatus for MVR evaporators of claim 1, wherein: The air inlets are uniformly distributed on the side and / or top of the liquid distribution plate.

3. The steam flush apparatus for MVR evaporators of claim 1, wherein: The top air inlets are arranged in a staggered mode with the bottom exhaust port.

4. The steam flush apparatus for MVR evaporators of claim 1, wherein: A nozzle is arranged at the exhaust port, and the nozzle is provided with an adjusting valve for adjusting the size of the nozzle nozzle.

5. The steam flush apparatus for MVR evaporators of claim 1, wherein: A preset interval is left between the bottom of the liquid distribution plate and the top of the column tube.

6. The steam flush apparatus for MVR evaporators of claim 1, wherein: The flushing pipe is communicated with the air inlets of the liquid distribution plate.

7. The steam flush apparatus for MVR evaporators of claim 1, wherein: The flushing pipe is communicated with the gas exhaust port of the gas-liquid separator.

8. The steam flush apparatus for MVR evaporators of claim 1, wherein: The liquid distribution plate is at least one, and the liquid distribution plates are uniformly distributed above the column tube.

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