CN204745696U - High boiling point rises material evaporative concentration system - Google Patents

Abstract

The utility model provides a high-boiling point liter material evaporation and concentration system, comprising: a low-concentration evaporation and concentration unit including: a material storage tank; Tank connection; MVR plate evaporator is connected with the third plate preheater; MVR cyclone separator is connected with MVR plate evaporator; MVR steam compressor is connected with MVR cyclone separator; high concentration evaporation concentration unit includes: single-effect plate evaporator , connected to the MVR cyclone separator through the MVR discharge pump, and connected to the MVR steam compressor; the single-effect cyclone separator is connected to the single-effect plate evaporator, and connected to the first plate preheater through the single-effect discharge pump; The cooler is connected with the first plate preheater through the production valve; the plate condenser is connected with the single-effect cyclone separator. The system has high working efficiency, saves a large amount of fresh steam consumption, greatly reduces the energy consumption level of the whole machine, and has high energy utilization rate.

Description

A high boiling point liter material evaporation and concentration system

technical field

The utility model relates to a system for evaporating and concentrating materials with high boiling point.

Background technique

In production, it is often encountered that low concentration (low boiling point liter) materials are concentrated to very high concentration (high boiling point liter), such as 80~90%. At present, the commonly used technological process mostly adopts the methods of multi-effect evaporation concentration, multi-effect circulation concentration, and MVR single-effect evaporation concentration. Since the boiling point of the solution rises gradually with the increase of the concentration, it rises sharply after reaching a certain concentration, and the boiling point of some materials has risen by more than 30 degrees when the concentration is 85%. If the multi-effect scheme is adopted, it is limited by the effective temperature difference. , the number of effects is generally good enough to achieve 4 effects, and its energy consumption is relatively high. If single-effect MVR plate evaporation is used, if the final concentration is directly achieved, the temperature rise of MVR is also very high, and some even reach 40°C , so that its energy consumption is not low, and its production cost is also high.

Utility model content

In order to solve the above existing problems, the purpose of this utility model is to provide a high boiling point liter material evaporation and concentration system. High rate.

In order to achieve the above object, the technical scheme of the utility model is:

A high-boiling point liter material evaporation and concentration system, comprising: a low-concentration evaporation and concentration unit, which includes: a material storage tank; the first to third plate preheaters are connected in series, and the feed port of the first plate preheater A discharge pump is connected to the discharge end of the material storage tank; a MVR plate evaporator, its feed port is connected to the discharge port of the third plate preheater; a MVR cyclone separator, its feed port It is connected with the discharge port of the MVR plate evaporator; a MVR steam compressor, whose gas inlet is connected with the gas outlet of the MVR cyclone separator, and whose gas outlet is respectively connected with the gas inlet of the third plate preheater and the MVR plate The gas inlet of the evaporator is connected; the high-concentration evaporation concentration unit includes: a single-effect plate evaporator whose feed port is connected to the liquid outlet of the MVR cyclone separator through a MVR discharge pump, and whose gas inlet is connected to the MVR cyclone separator liquid outlet. The steam compressor gas outlet is connected; a single-effect cyclone separator, its feed port is connected to the discharge port of the single-effect plate evaporator, and its liquid outlet is connected to the first plate preheater through a single-effect discharge pump connected to the water inlet; a discharge cooler, the feed port of which is connected to the liquid outlet of the first plate preheater through a production valve, and the production valve is also connected to the feed port of the material storage tank; a plate type A condenser whose air inlet is connected to the gas outlet of the single-effect cyclone separator.

Further, it also includes a mass flow meter, which is arranged on the connecting pipeline between the second plate preheater and the production valve.

In addition, the production valve is a three-way valve.

In addition, it also includes a fresh steam supplementary pipeline, which is connected to the gas inlet of the third plate preheater through an MVR preheating steam regulating valve, and connected to the gas inlet of the MVR steam compressor through a self-operated regulating valve, It is connected with the gas inlet of the single-effect plate evaporator through a single-effect evaporating steam regulating valve.

Furthermore, the gas inlet pipeline and the gas outlet pipeline of the MVR steam compressor are communicated through an MVR bypass valve.

Furthermore, it also includes a condenser gas-liquid separation tank, its water inlet is connected to the condensed water outlet of the plate condenser, its water outlet is connected to the first condensed water outlet through a condenser condensed water pump, and its non-condensable gas outlet is passed through The pipeline is connected to a vacuum pump.

Moreover, it also includes: an MVR gas-liquid separation tank, the water inlet of which is respectively connected to the liquid outlet of the third plate preheater and the condensate outlet of the MVR plate evaporator, and the water outlet is connected to the water inlet of an MVR condensate pump; A single-effect gas-liquid separation tank, its water inlet is connected to the condensed water outlet of the single-effect plate evaporator, and its water outlet is connected to the water inlet of a single-effect condensed water pump; the water outlet of the MVR condensed water pump is connected to the single-effect condensed water pump After the water ports are connected in parallel, they are connected to the desuperheating water inlet of the MVR steam compressor through an MVR desuperheating water valve, and connected to the water inlet of the second plate preheater, and the water outlet of the second plate preheater is connected to the second condensing Water outlet.

In addition, the non-condensable gas port of the MVR plate evaporator and the non-condensable gas port of the single-effect plate evaporator are respectively connected to the air inlet of the plate condenser.

Furthermore, the non-condensable gas port of the MVR gas-liquid separation tank and the non-condensable gas port of the single-effect gas-liquid separation tank are respectively connected to the air inlet of the plate condenser.

Furthermore, the first plate preheater, the second plate preheater, the third plate preheater, and the MVR plate evaporator all adopt a plate structure; the inside of the MVR cyclone separator and the single-effect cyclone separator There are anti-foaming structure and anti-vortex structure respectively.

The beneficial effects of the utility model are:

1) For the first time, the MVR plate structure evaporation system is applied to the low-concentration concentration stage, which not only combines the high-efficiency characteristics of the plate structure, but also integrates the energy-saving characteristics of MVR evaporation. The first plate preheater, the second plate preheater, the third plate preheater, and the MVR plate evaporator all adopt the plate structure, which has the characteristics of high efficiency, small size, light weight, easy maintenance, and small heat loss. ; The secondary steam in the low-concentration evaporation and concentration stage is compressed by the MVR steam compressor and reused as heating steam. The consumption of fresh steam is basically zero, which greatly reduces the energy consumption of the system. Secondly, steam condensate, hot material, and MVR excess steam are all used to preheat the material, and the waste heat is fully utilized, which has a remarkable energy-saving effect.

2) The high-concentration evaporation and concentration stage adopts a single-effect plate evaporator, which has a large temperature difference and can adapt to the evaporation and concentration of high-concentration and high-boiling-point materials. Smaller, no need for loops, improving efficiency and saving time.

3) After the MVR plate evaporator and the single-effect plate evaporator, there is a cyclone separator. The cyclone separator is designed with a special defoaming and anti-vortex design, which can further separate the secondary steam and reduce the mist Entrainment reduces the COD value of condensed water and improves the quality of condensed water.

4) The secondary steam from the MVR steam compressor mainly enters the MVR plate evaporator, and part of the excess secondary steam enters the single-effect plate evaporator of the high-concentration evaporation and concentration unit as a part of the heating source, and a part of the steam comes to preheat The heat enters the feed of the low-concentration evaporative concentration unit, which not only reduces the load of the condenser, but also reduces the consumption of fresh steam and improves the utilization rate of energy.

5) Set up a mass flow meter to monitor the liquid concentration after high-concentration evaporation and concentration to ensure product quality and ensure the smooth progress of subsequent production.

Description of drawings

Fig. 1 is a schematic structural diagram of a high boiling point liter material evaporation and concentration system provided by an embodiment of the present invention.

Detailed ways

Referring to Fig. 1, a kind of high boiling point liter material evaporation concentration system described in the utility model comprises:

Low-concentration evaporative concentration unit, which includes:

A material storage tank 1; the first to third plate preheaters 201 to 203 are connected in series, and the feed port of the first plate preheater 201 is connected to the discharge end of the material storage tank 1 through a discharge pump 3 Connect; a MVR plate evaporator 4, its feed port is connected with the discharge port of the third plate preheater 203; a MVR cyclone separator 5, its feed port is connected with the 4 discharge ports of the MVR plate evaporator Connect; a MVR steam compressor 6, its gas inlet is connected with the gas outlet of the MVR cyclone separator 5, and its gas outlet is respectively connected with the gas inlet of the third plate preheater 203 and the gas inlet of the MVR plate evaporator 4;

High-concentration evaporative concentration unit, which includes:

A single-effect plate evaporator 7, its feed port is connected with the liquid outlet of the MVR cyclone separator 5 through a MVR discharge pump 8, and its gas inlet is connected with the 6 gas outlets of the MVR vapor compressor; a single-effect cyclone Separator 9, its feed port is connected with 7 discharge ports of described single-effect plate evaporator, and its liquid outlet is connected with described first plate preheater 201 water inlets through a single-effect discharge pump 10; Cooler 11, its feed port is connected with the liquid outlet of the first plate preheater 201 through a production valve 12, and the production valve 12 is also connected with the feed port of the material storage tank 1; a plate condenser 13. Its air inlet is connected with the gas outlet of the single-effect cyclone separator 9.

Further, a mass flow meter 14 is also included, which is arranged on the connecting pipeline between the second plate preheater 202 and the production valve 12 .

In addition, the production valve 12 is a three-way valve.

In addition, it also includes a fresh steam supplementary pipeline 15, which is connected to the gas inlet of the third plate preheater 203 through a MVR preheating steam regulating valve 16, and connected to the gas inlet of the third plate preheater 203 through a self-operated regulating valve (not shown). The gas inlet of the MVR steam compressor 6 is connected to the gas inlet of the single-effect plate evaporator 7 through a single-effect evaporation steam regulating valve 17 .

Furthermore, the gas inlet pipeline and the gas outlet pipeline of the MVR vapor compressor 6 are communicated through an MVR bypass valve 18 .

Furthermore, it also includes a condenser gas-liquid separation tank 19, its water inlet is connected to the condensed water outlet of the plate condenser 13, and its water outlet is connected to the first condensed water discharge port 21 through a condenser condensed water pump 20, and its water outlet The non-condensable gas port is connected with a vacuum pump 22 through a pipeline.

And, also include:

A MVR gas-liquid separation tank 23, its water inlet is respectively connected with the liquid outlet of the third plate preheater 203 and the condensed water outlet of the MVR plate evaporator 4, and its water outlet is connected with a MVR condensed water pump 24 water inlet;

A single-effect gas-liquid separation tank 25, its water inlet is connected with the condensed water outlet of the single-effect plate evaporator 7, and its water outlet is connected with a single-effect condensed water pump 26 water inlet;

After the water outlet of the MVR condensed water pump 24 is connected in parallel with the water outlet of the single-effect condensed water pump 26, it is connected to the inlet of the desuperheated water of the MVR steam compressor 6 through an MVR desuperheating water valve 27, and is connected to the second plate preheater 202 The water inlet is connected, and the water outlet of the second plate preheater 202 is connected to the second condensed water outlet 28 .

In addition, the non-condensable gas port of the MVR plate evaporator 4 and the non-condensable gas port of the single-effect plate evaporator 7 are respectively connected to the air inlet of the plate condenser 13 .

Furthermore, the non-condensable gas port of the MVR gas-liquid separation tank 23 and the non-condensable gas port of the single-effect gas-liquid separation tank 25 are respectively connected to the air inlet of the plate condenser 13 .

Furthermore, the first plate preheater 201, the second plate preheater 202, the third plate preheater 203, and the MVR plate evaporator 4 all adopt a plate structure; the MVR cyclone separator 5 and the unit The effective cyclone separator 9 is respectively provided with a defoaming structure (not shown) and an anti-vortex structure (not shown).

The material evaporation and concentration process of a high boiling point liter material evaporation and concentration system described in the utility model is as follows:

Referring to Figure 1, the material flows through the material storage tank 1 in sequence: MVR feed pump 3, first plate preheater 201, second plate preheater 202, third plate preheater 203, and MVR plate evaporator 4 The material that is heated and boiled into a gas-liquid mixture enters the MVR cyclone separator 5, and the gas comes out from the top of the MVR cyclone separator 5 and is inhaled by the MVR steam compressor 6, and then the MVR desuperheating water valve 27 adds and desuperheats the water after pressurization and desuperheating , is discharged from the gas outlet of the MVR steam compressor 6, most of the gas (steam) enters the MVR plate evaporator 4 as heating steam, part of the remaining gas (steam) is sucked away by the third plate preheater 203 as preheating steam, and the other part The gas (steam) is sent to the single-effect plate evaporator 7 as heating steam (thereby reducing the load of the condenser, reducing the consumption of fresh steam, and improving the utilization rate of energy), and the liquid is discharged from the bottom of the MVR cyclone separator 5 It is sent to the single-effect plate evaporator 7 by the MVR discharge pump 8 (that is, the liquid in the MVR cyclone separator 5 enters the high-concentration evaporation and concentration unit), heated and boiled to form a gas-liquid mixture, and then enters the single-effect cyclone separator 9 , the gas (steam) comes out from the top of the single-effect cyclone separator 9, enters the plate condenser 13, condenses to form condensed water, and is discharged through the condenser condensed water pump 20 through the first condensed water outlet 21, and the concentrated liquid is discharged from the single-effect cyclone The bottom of the separator 9 is sent to the first plate preheater 202 by the single-effect discharge pump 10 to exchange heat with the cold material coming in from the material storage tank 1 through the discharge pump 3, and then enters the mass flow meter 14 to detect whether its concentration is Meet the process requirements, if the concentration required by the process is reached, the production valve 12 is opened, the material enters the plate cooler 11, and through heat exchange with the cooling circulating water, the discharged material reaches the required temperature, and then discharged into the next process section to complete the process. The high boiling point liter evaporation and concentration process of the material in the material storage tank 1, if the concentration is not up to the standard, the production valve 12 will be switched to the reflux state, and the material will return to the material storage tank 1, and continue to pass through the aforementioned low-concentration evaporation and concentration unit and high-concentration evaporation The concentration unit carries out the process of evaporating and concentrating materials with high boiling point liters.

The condensed water of the MVR plate evaporator 4 and the third plate preheater 203 enters the MVR gas-liquid separation tank 23, and the condensed water of the single-effect plate evaporator 7 enters the single-effect gas-liquid separation tank 25, and then they are respectively pumped by the MVR condensed water pump 24 And the single-effect condensate pump 26 is pumped out and collected, and then most of the condensed water enters the second plate preheater 202 to exchange heat with the incoming cold material to realize the utilization of waste heat, and a small part of the condensed water enters the MVR steam through the MVR desuperheating water valve 27 Compressor 6 is used as desuperheating water. The condensed water after heat exchange with the incoming material is directly discharged to the second condensed water outlet 28 .

The non-condensable gas in the MVR plate evaporator 4, the MVR gas-liquid separation tank 23, and the single-effect plate evaporator 7 are respectively connected to the plate condenser 13 by their non-condensable gas outlets through the non-condensable gas pipeline, and the plate condenser The condensed water outlet of 13 is connected to the gas-liquid separation tank 19 of the condenser, and the non-condensable gas is pumped away by the vacuum pump 22 through the gas-liquid separation tank 19 of the condenser, and a small amount of condensed water is pumped to the first by the condenser condensate water pump 20. The condensed water discharge port 21 is discharged.

The insufficient steam of the single-effect plate evaporator 7 is supplemented by the fresh steam replenishment pipeline 15 through the single-effect evaporation steam regulating valve 17 entering the single-effect plate evaporator 7; the sealed steam required by the MVR steam compressor 6 is also supplemented by the fresh steam Line 15 supplements the sealed steam pipe entering the MVR steam compressor 6 through a self-operated regulating valve.

The vacuum state of the whole device is formed by a water ring vacuum pump.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the utility model has been described in detail with reference to the preferred embodiment, those skilled in the art should understand that the technical solution of the utility model can be modified or equivalently replaced without departing from the scope of the technical solution of the utility model. Included in the scope of the claims of the present utility model.

Claims (10)

1. A high boiling point liter material evaporation concentration system is characterized in that, comprising: Low-concentration evaporative concentration unit, which includes: a material storage tank; The first to third plate preheaters are connected in series, and the feed port of the first plate preheater is connected to the discharge end of the material storage tank through a discharge pump; A MVR plate evaporator, its feed port is connected with the discharge port of the third plate preheater; A MVR cyclone separator, its feed port is connected with the discharge port of the MVR plate evaporator; A MVR steam compressor, its gas inlet is connected to the gas outlet of the MVR cyclone separator, and its gas outlet is respectively connected to the gas inlet of the third plate preheater and the gas inlet of the MVR plate evaporator; High-concentration evaporative concentration unit, which includes: A single-effect plate evaporator, its feed port is connected to the liquid outlet of the MVR cyclone separator through an MVR discharge pump, and its gas inlet is connected to the gas outlet of the MVR vapor compressor; A single-effect cyclone separator, its feed port is connected to the discharge port of the single-effect plate evaporator, and its liquid outlet is connected to the water inlet of the first plate preheater through a single-effect discharge pump; A discharge cooler, the feed port of which is connected to the liquid outlet of the first plate preheater through a production valve, and the production valve is also connected to the feed port of the material storage tank; A plate condenser, the air inlet of which is connected with the gas outlet of the single-effect cyclone separator. 2. A high boiling point liter material evaporation and concentration system according to claim 1, characterized in that it further comprises a mass flow meter arranged on the connecting pipeline between the second plate preheater and the production valve. 3. A high boiling point liter material evaporation and concentration system according to claim 1 or 2, characterized in that the production valve is a three-way valve. 4. A kind of high boiling point liter material evaporation concentration system according to claim 1, is characterized in that, also comprises a fresh steam make-up pipeline, and it passes through a MVR preheating steam regulating valve and described third plate preheater gas The inlet is connected to the gas inlet of the MVR steam compressor through a self-operated regulating valve, and connected to the gas inlet of the single-effect plate evaporator through a single-effect evaporating steam regulating valve. 5. A high boiling point liter material evaporation and concentration system according to claim 1, characterized in that the gas inlet pipeline of the MVR vapor compressor and the gas outlet pipeline are communicated through an MVR bypass valve. 6. A kind of high boiling point liter material evaporation concentration system according to claim 1, it is characterized in that, also comprises a condenser gas-liquid separation tank, its water inlet is connected with the condensed water outlet of described plate condenser, and its outlet The water port is connected to the first condensed water discharge port through a condenser condensed water pump, and its non-condensable gas port is connected to a vacuum pump through a pipeline. 7. A kind of high boiling point liter material evaporation concentration system according to claim 1, is characterized in that, also comprises: An MVR gas-liquid separation tank, its water inlet is respectively connected with the liquid outlet of the third plate preheater and the condensed water outlet of the MVR plate evaporator, and its water outlet is connected with the water inlet of a MVR condensed water pump; A single-effect gas-liquid separation tank, its water inlet is connected to the condensed water outlet of the single-effect plate evaporator, and its water outlet is connected to the water inlet of a single-effect condensed water pump; After the outlet of the MVR condensate pump is connected in parallel with the outlet of the single-effect condensate pump, it is connected to the inlet of the MVR steam compressor desuperheating water through an MVR desuperheating water valve, and is connected to the water inlet of the second plate preheater. The water outlet of the second plate preheater is connected to the second condensed water outlet. 8. A kind of high boiling point liter material evaporation concentration system according to claim 1 or 7, it is characterized in that, the non-condensable gas port of the MVR plate evaporator and the non-condensable gas port of the single-effect plate evaporator are respectively connected with the plate type evaporator. Condenser air inlet connection. 9. A kind of high boiling point liter material evaporation concentration system according to claim 7, is characterized in that, the non-condensable gas port of described MVR gas-liquid separation tank and the non-condensable gas port of single-effect gas-liquid separation tank are respectively connected with plate condenser Inlet connection. 10. A kind of high-boiling point liter material evaporation concentration system according to claim 1, characterized in that, the first plate preheater, the second plate preheater, the third plate preheater, the MVR plate evaporator Both adopt the plate structure; the MVR cyclone separator and the single-effect cyclone separator are respectively equipped with a defoaming structure and an anti-vortex structure.