CN212687608U

CN212687608U - Vacuum treatment system and sewage treatment system

Info

Publication number: CN212687608U
Application number: CN202020774766.6U
Authority: CN
Inventors: 荣东
Original assignee: Guangdong Wenyang Environmental Technology Co ltd
Current assignee: Guangdong Wenyang Environmental Technology Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-03-12
Anticipated expiration: 2030-05-11

Abstract

A vacuum treatment system and a sewage treatment system are provided, wherein the vacuum treatment system is used for an MVR evaporator and comprises a condensation component, a vacuumizing component and a gas-liquid separation component; the condensation component comprises a condenser, an air inlet pipe and a condensation liquid outlet pipe, the air inlet pipe and the condensation liquid outlet pipe are respectively connected with two sides of the condenser, the air inlet pipe is used for being communicated with the MVR evaporator to supply tail gas to circulate, and the condensation liquid outlet pipe is used for discharging liquid condensed by the condenser; the vacuumizing assembly comprises an input pipe, a vacuumizing device and an output pipe which are sequentially connected, one end of the input pipe, which is far away from the vacuumizing device, is connected with a condenser, and the vacuumizing device is used for vacuumizing the MVR evaporator to a negative pressure state; the gas-liquid separation assembly comprises a separator, an exhaust pipe and a liquid discharge pipe, one end of the output pipe, which is far away from the vacuumizing device, is connected with the separator, the exhaust pipe is used for discharging gas treated by the separator, and the liquid discharge pipe is used for discharging liquid treated by the separator. This vacuum treatment system's evacuation ware takes out MVR evaporimeter to the negative pressure, guarantees that the comdenstion water after the processing reaches the effluent standard.

Description

Vacuum treatment system and sewage treatment system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a vacuum treatment system and sewage treatment system.

Background

Mechanical vapor recompression evaporator, namely MVR evaporator (MVR for short), the MVR evaporator needs a part of steam to preheat when equipment is started, the required steam can be greatly reduced after normal operation, and the electric energy is converted into the heat energy of the steam in the process of pressurizing secondary steam by a compressor, so the required steam is reduced in the operation process of the equipment, and the required electric quantity is greatly increased. The secondary steam of the MVR evaporator is compressed by the compressor, the pressure and the temperature are increased, the enthalpy is increased, the secondary steam is sent to a heating chamber of the evaporator to be used as heating steam, namely, generating steam, so that the feed liquid is maintained in an evaporation state, and the heating steam transfers the heat to the material to be condensed into water. Therefore, the steam which is originally discarded is fully utilized, the latent heat is recovered, the heat efficiency is improved, and therefore, the MVR evaporator is largely used.

At present, in MVR evaporation system, along with the temperature increases, the back is come out in the low boiling point of sewage or volatile VOC's organic matter evaporation, becomes the comdenstion water after the compressor entering heater heat transfer along with the secondary steam through the MVR evaporimeter again, leads to the water unqualified, is difficult to handle the sewage that contains low boiling point or volatile VOC organic matter.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a vacuum treatment system and a sewage treatment system with simple structure and convenient use.

A vacuum processing system for an MVR vaporizer, the vacuum processing system comprising:

the condensation assembly comprises a condenser, an air inlet pipe and a condensation liquid outlet pipe, the air inlet pipe and the condensation liquid outlet pipe are respectively connected with two sides of the condenser, the air inlet pipe is used for communicating the MVR evaporator to allow tail gas to circulate, and the condensation liquid outlet pipe is used for discharging liquid condensed by the condenser;

the vacuumizing assembly comprises an input pipe, a vacuumizing device and an output pipe which are sequentially connected, one end of the input pipe, which is far away from the vacuumizing device, is connected with the condenser, and the vacuumizing device is used for vacuumizing the MVR evaporator to a negative pressure state;

the gas-liquid separation assembly comprises a separator, an exhaust pipe and a liquid discharge pipe, one end, far away from the vacuumizer, of the output pipe is connected with the separator, the exhaust pipe is used for discharging gas treated by the separator, and the liquid discharge pipe is used for discharging liquid treated by the separator.

In one embodiment, the air inlet pipe is connected with the upper part of the condenser, and the condensation liquid outlet pipe is connected with the lower part of the condenser.

In one embodiment, the air inlet pipe and the input pipe are respectively connected with two ends of the condenser.

In one embodiment, the condensing assembly further comprises a coolant liquid pipe and a coolant liquid outlet pipe, the coolant liquid pipe is connected to the lower portion of the condenser, and the coolant liquid outlet pipe is connected to the upper portion of the condenser.

In one embodiment, the gas-liquid separation assembly further comprises a return pipe connected to the separator, and the return pipe is used for returning the liquid treated by the separator to the vacuum extractor.

In one embodiment, the evacuation assembly further comprises a sealant fluid line connected to the evacuator.

In one embodiment, the evacuation assembly further comprises a flow meter mounted on the sealed liquid delivery tube.

In one embodiment, the evacuation assembly further comprises a check valve mounted on the input tube.

In one embodiment, the vacuum pump is a water ring vacuum pump.

A sewage treatment system comprises an MVR evaporator and the vacuum treatment system, wherein the MVR evaporator is connected with the vacuum treatment system.

The vacuum treatment system pumps the MVR evaporator to a negative pressure state through the vacuum pumping device, so that the MVR evaporator is evaporated in the negative pressure state, and the problem that organic matters with low boiling points or volatile VOC in sewage are evaporated is effectively solved; part of tail gas treated by the MVR evaporator is condensed by a condenser to form condensed water and is discharged, and the treated condensed water is ensured to reach the effluent standard; and part of tail gas becomes non-condensable gas, and the non-condensable gas enters a separator through a vacuum extractor and then is subjected to gas-liquid separation. The sewage treatment system has simple structure and convenient use.

Drawings

Fig. 1 is a schematic structural diagram of a vacuum processing system according to an embodiment of the present invention.

Reference is made to the accompanying drawings in which:

a vacuum processing system 100;

the device comprises a condensation component 10, a condenser 11, an air inlet pipe 12, a condensation liquid outlet pipe 13, a cooling liquid conveying pipe 14, a cooling liquid outlet pipe 15, a vacuumizing component 20, an input pipe 21, a vacuumizing device 22, an output pipe 23, a check valve 24, a sealing liquid conveying pipe 25, a flowmeter 26, a gas-liquid separation component 30, a separator 31, an exhaust pipe 32, a liquid discharge pipe 33, a return pipe 34 and an MVR evaporator 90.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, a sewage treatment system according to an embodiment of the present invention includes an MVR evaporator 90 and a vacuum treatment system 100, wherein the MVR evaporator 90 is connected to the vacuum treatment system 100. The vacuum processing system 100 is used for the MVR evaporator 90, and the vacuum processing system 100 comprises a condensing assembly 10, a vacuumizing assembly 20 and a gas-liquid separating assembly 30. The vacuum processing system 100 pumps the MVR evaporator 90 to a negative pressure state through the vacuum pumping assembly 20, so that the MVR evaporator 90 is evaporated in the negative pressure state, thereby effectively solving the problem that organic matters with low boiling points or volatile VOCs in sewage are evaporated; part of the tail gas treated by the MVR evaporator 90 is condensed by the condensing assembly 10 to form condensed water and is discharged, part of the tail gas becomes non-condensable gas, and the non-condensable gas is subjected to gas-liquid separation by the gas-liquid separation assembly 30, so that the treated condensed water reaches the effluent standard.

As shown in fig. 1, in the present embodiment, the condensation assembly 10 includes a condenser 11, an air inlet pipe 12 and a condensation liquid outlet pipe 13, the air inlet pipe 12 and the condensation liquid outlet pipe 13 are respectively connected to two sides of the condenser 11, the air inlet pipe 12 is used for communicating with the MVR evaporator 90 for circulating the tail gas, and the condensation liquid outlet pipe 13 is used for discharging the liquid condensed by the condenser 11; alternatively, the gas inlet pipe 12 is connected with the upper part of the condenser 11 due to lower gas density, and the condensation liquid outlet pipe 13 is connected with the lower part of the condenser 11 due to higher liquid density; further, one end of the condensation liquid outlet pipe 13 far away from the condenser 11 is communicated with a condensation water tank of the MVR evaporator 90 for recycling. In order to ensure the condensation effect, the condensation unit 10 further includes a coolant pipe 14 and a coolant outlet pipe 15, the coolant pipe 14 is connected to a lower portion of the condenser 11, and the coolant outlet pipe 15 is connected to an upper portion of the condenser 11. During operation, part of tail gas exhausted and condensed by the MVR evaporator 90 flows into the condenser 11 through the air inlet pipe 12, is condensed by the condenser 11 to form condensed water, and is exhausted through the condensed liquid outlet pipe 13.

In one embodiment, the vacuum pumping assembly 20 includes an input tube 21, a vacuum pump 22 and an output tube 23 connected in sequence, one end of the input tube 21 away from the vacuum pump 22 is connected to the condenser 11, and the vacuum pump 22 is used for pumping the MVR evaporator 90 to a negative pressure state, so that the MVR evaporator 90 is evaporated in the negative pressure state, that is, at a low temperature, and thus, low-boiling point or volatile VOC organic compounds in the sewage are not evaporated; for example, when the concentration of toluene in the sewage is between 0.1 mg/l and 0.4mg/l, the temperature needs to be controlled at 50 ℃ to 80 ℃ for evaporation, i.e. the pressure of the vacuum degree needs to be controlled at-88.67 kpa to-51.7 kpa. Alternatively, the inlet pipe 12 and the inlet pipe 21 are respectively connected to both ends of the condenser 11 so as to be sufficiently condensed; the vacuum pump 22 is a water ring vacuum pump. Further, the vacuum pumping assembly 20 further comprises a check valve 24, and the check valve 24 is installed on the input pipe 21. The evacuation assembly 20 further includes a sealant fluid line 25, the sealant fluid line 25 being connected to the vacuum pump 22 for operation of the vacuum pump 22. To observe the flow rate of the sealing liquid, the evacuation assembly 20 further includes a flow meter 26, and the flow meter 26 is mounted on the sealing liquid feed tube 25. When the device works, part of tail gas after exhaust and condensation treatment by the MVR evaporator 90 becomes non-condensable gas, and the non-condensable gas enters the vacuum-pumping device 22 through the input pipe 21 and is exhausted through the output pipe 23.

In order to treat the non-condensable gas discharged from the output pipe 23, the gas-liquid separation assembly 30 comprises a separator 31, an exhaust pipe 32 and a liquid discharge pipe 33, wherein one end of the output pipe 23, which is far away from the vacuum extractor 22, is connected with the separator 31, the exhaust pipe 32 is used for discharging the gas treated by the separator 31, and the liquid discharge pipe 33 is used for discharging the liquid treated by the separator 31; optionally, the separator 31 is a cyclone separator tank. The gas-liquid separation assembly 30 further comprises a return pipe 34 connected to the separator 31, wherein the return pipe 34 is used for returning the liquid treated by the separator 31 to the vacuum extractor 22 for recycling. When in use, the non-condensable gas discharged from the output pipe 23 enters the separator 31, is treated by the separator 31, is exhausted through the exhaust pipe 32, and is drained through the liquid discharge pipe 33, or is returned to the vacuum extractor 22 through the return pipe 34.

When the vacuum treatment system 100 is used, the MVR evaporator 90 is pumped to a negative pressure state through the vacuum pumping device 22, so that the MVR evaporator 90 is evaporated in the negative pressure state, and organic matters with low boiling points or volatile VOC in the sewage are not evaporated, thereby preventing the organic matters with low boiling points or volatile VOC in the sewage from being evaporated out and then enter a heater through a compressor of the MVR evaporator 90 along with secondary steam to be condensed water after heat exchange, and causing unqualified water outlet; part of tail gas which is exhausted by the MVR evaporator 90 and condensed is condensed by the condenser 11 to form condensed water and is discharged, so that the condensed water after treatment can reach the effluent standard; part of the tail gas becomes non-condensable gas, the non-condensable gas enters the separator 31 through the vacuum-pumping device 22, gas-liquid separation is carried out, the gas is discharged through the exhaust pipe 32, the liquid is discharged through the liquid discharge pipe 33, or the liquid is returned to the vacuum-pumping device 22 through the return pipe 34 for recycling.

The vacuum processing system 100 pumps the MVR evaporator 90 to a negative pressure state through the vacuum pump 22, so that the MVR evaporator 90 is evaporated in the negative pressure state, thereby effectively solving the problem that organic matters with low boiling points or volatile VOCs in sewage are evaporated; part of the tail gas treated by the MVR evaporator 90 is condensed by the condenser 11 to form condensed water and is discharged, so that the treated condensed water is ensured to reach the effluent standard; part of the tail gas becomes non-condensable gas, and the non-condensable gas enters the separator 31 through the vacuum extractor 22 and then is subjected to gas-liquid separation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A vacuum processing system for an MVR evaporator, the vacuum processing system comprising:

2. The vacuum processing system of claim 1, wherein the gas inlet pipe is connected to an upper portion of the condenser, and the condensate outlet pipe is connected to a lower portion of the condenser.

3. The vacuum processing system according to claim 1, wherein the inlet pipe and the inlet pipe are connected to both ends of the condenser, respectively.

4. The vacuum processing system of claim 1, wherein the condensing assembly further comprises a coolant fluid line and a coolant fluid outlet line, the coolant fluid line being connected to a lower portion of the condenser, the coolant fluid outlet line being connected to an upper portion of the condenser.

5. The vacuum processing system of claim 1, wherein the gas-liquid separation assembly further comprises a return line connected to the separator for returning the liquid processed by the separator to the vacuum extractor.

6. The vacuum processing system of claim 1, wherein the evacuation assembly further comprises a sealant fluid line, the sealant fluid line connecting the evacuator.

7. The vacuum processing system of claim 6, wherein the evacuation assembly further comprises a flow meter mounted on the sealing liquid infusion tube.

8. The vacuum processing system of claim 1, wherein the evacuation assembly further comprises a check valve mounted on the input tube.

9. The vacuum processing system of claim 1, wherein the vacuum pump is a water ring vacuum pump.

10. A wastewater treatment system comprising an MVR evaporator in communication with the vacuum treatment system according to any of claims 1 to 9.