CN208785790U - A kind of cleaning device of MVR evaporator - Google Patents

Abstract

The utility model discloses a kind of cleaning devices of MVR evaporator, relate generally to technical field of landfill leachate treatment, including head tank, feed pump, preheater, separator, forced circulation pump, the forced circulation pump connecting plate type evaporator, plate-type evaporator connect separator；Separator connects vapour compression machine, vapour compression machine connecting plate type evaporator, plate-type evaporator connects drainer, drainer is connected to preheater by draining pump, and heat exchange is carried out with the raw material of raw material, it is characterized by: being equipped with stock solution flow meter on the pipeline of the separator and preheater, electrically operated valve is equipped with after the stock solution flow meter, valve III is equipped with before the concentrate discharging pump, it is connect by valve I with concentrate discharging pump inlet at the top of the separator, the separator lower part passes through water pump, valve II is connect with condensate draining, it is energy saving, without chemical contamination.

Description

A kind of cleaning device of MVR evaporator

Technical field

The utility model relates generally to technical field of landfill leachate treatment, the cleaning dress of specifically a kind of MVR evaporator It sets.

Background technique

Landfill leachate refers to the moisture that rubbish itself contains in refuse landfill, the sleet water into landfill yard And other moisture, the saturation moisture capacity of rubbish, overburden layer is deducted, and undergo waste layer and overburden layer and a kind of high concentration for being formed Organic wastewater.There are also the moisture that the preparation of accumulation is leaked out for the rubbish of burning.

The contamination control of landfill leachate is a great problem of municipal refuse landfill stabilization.Landfill leachate has pollutant Type is more, complicated component, nutrient (ammonia-nitrogen content is high, and phosphorus content is relatively low) out of proportion, content of beary metal and bio-toxicity Higher, water quality and quantity fluctuates the features such as big, has become generally acknowledged one of difficult waste water.2008, country promulgated " life Refuse landfill contamination control standard (GB16889-2008) ", requirements at the higher level are proposed to the processing of landfill leachate.

MVR technology is applied to landfill leachate, biogas slurry, in the engineering of industry water process with high salt in recent years, with low-consumption high-efficiency, Numerous advantages such as water stabilization, investment economy have obtained industry and have received and approve.MVR is mechanical steam recompression technology The abbreviation of (mechanical vapor recompression) is the secondary steam and its energy generated using vapo(u)rization system itself Amount, through vapour compression machine compressed action, promotes the thermal energy of secondary steam, so recycles to vapo(u)rization system heat supply, thus reduction pair One power-saving technology of the demand of outside resources.

Landfill leachate complicated component, not only salt content is high, humus high organic content, can not keep away in MVR operation Have scale formation with exempting from, and with the extension of runing time, the frequency of fouling increases, causes under equipment evaporability Drop, therefore need to carry out corresponding Fouling Cleaning processing when the operation of MVR equipment.

The Chinese patent of 107098412 A of application publication number CN discloses a kind of landfill leachate MVR evaporation process Fouling Cleaning method, it is included the following process: (1) first by landfill leachate in mechanical steam recompression (MVR) equipment and Concentrate discharge, reinjects the acid solution of 0.5-2mol/L, collects to heat exchanger tube (plate), distributor, the concentrate inside MVR equipment The components such as slot successively carry out acid soak 1-3h, acid elution 1-3h, clear water washing 30-45min, draining；(2) then by 0.5-2 Mol/L lye injects inside evaporator, successively carries out alkali and impregnates 1-3h, alkali elution 1-3h, clear water washing 30-45min, draining； (3) 0.5-1mol/L acid solution is injected inside evaporator after, successively carries out acid soak 0.5-2h, acid elution 0.5-2 h, clear water Wash 30-45min, draining；(4) finally will 0.5-1mol/L lye inject evaporator inside, successively carry out alkali impregnate 0.5-2h, Alkali elutes 0.5-2h, clear water washing 30-45min, draining.Above-mentioned file both increases cost all using chemical component, has Cause the slight erosion of equipment.

Utility model content

In order to overcome the deficiencies in the prior art and defect, the utility model provides a kind of the clear of MVR evaporator Cleaning device.

In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution: a kind of cleaning dress of MVR evaporator It sets, including head tank, feed pump, preheater, the separator being successively linked in sequence, the purified liquor outlet of separator connects forced circulation The circulation fluid outlet of pump, the circulation fluid import of the forced circulation pump connecting plate type evaporator, plate-type evaporator is connected to separation Inside device；The vapor interface of separator connects vapour compression machine, vapour compression machine be connected to the heating steam of plate-type evaporator into Mouthful, the condensate outlet of plate-type evaporator is connected to drainer, and drainer is connected to preheater by draining pump, and with raw material Raw material carries out heat exchange；The concentrated solution outlet of separator is connected to stirred tank by concentrate discharging pump, and stirred tank passes through concentration Liquid transfering material pump is connected to centrifugal dehydrator, and the liquid outlet of centrifugal dehydrator is connected to mother liquor surge tank, and mother liquor surge tank passes through mother Liquid pump is connected to head tank, it is characterised in that: is equipped with valve III before the concentrate discharging pump, leads at the top of the separator It crosses valve I to connect with concentrate discharging pump inlet, the separator lower part is connect by water pump, valve II with condensate draining.

Stock solution flow is equipped on the pipeline of the separator and preheater as a further improvement of the utility model, Meter is equipped with electrically operated valve after the stock solution flow meter, is equipped with evaporation on pipeline between the separator and vapour compression machine Flowmeter, the evaporation flowmeter, stock solution flow meter, electrically operated valve and controlled system with self-regulation connect.

Filter device is equipped with before the water pump as a further improvement of the utility model,.

The automatic control system is according to the landfill leachate of the processing as a further improvement of the utility model, Ingredient sets the ratio for needing the stoste and evaporation capacity that adjust.

Sludge bucket is equipped in the centrifugal dehydrator side as a further improvement of the utility model,.

The preheater shell side inlet passes through piping connection draining pump as a further improvement of the utility model,.

Compared with prior art, the utility model have the beneficial effect that by the separator by valve II with Condensate draining connection, separator top are connect by valve I with concentrate discharging pump inlet, can be further using in condensate draining Water, realize circulation sustainable development, energy saving, and secondary injury is not caused to equipment, the water impurity after over cleaning Dehydrating and curing, no chemical contamination can be carried out by follow up device.

Detailed description of the invention

The utility model is further described with reference to the accompanying drawings and detailed description:

Fig. 1 is a kind of structural schematic diagram of the cleaning device of MVR evaporator of the utility model.

In figure: 1 batch can, 2 feed pumps, 3 preheaters, 4 draining pumps, 5 drainers, 6 plate-type evaporators, 7 vapour compression machines, 8 Forced circulation pump, 9 separators, 10 concentrate discharging pumps, 11 stirred tanks, 12 concentrate transfering material pumps, 13 centrifugal dehydrators, 14 mothers Liquid surge tank, 15 mother liquors pump, 16 sludge buckets, 17 evaporation flowmeters, 18 stock solution flow meters, 19 electrically operated valves, 20 automatic adjustment controls System processed, 21 valve I, 22 valve II, 23 valve III, 24 water pumps, 25 filter devices, 26 condensate drainings

It is worth noting that, term " center ", "upper", "lower", "left", "right", " perpendicular in the description of the present invention, Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Specific embodiment

In order to which the technical solution of the utility model and beneficial effect are more clearly understood, with reference to the accompanying drawing and it is embodied The utility model is described in further detail in example, it should be understood that the specific embodiments described herein are only used for managing The utility model is solved, is not used to limit the utility model, those of ordinary skill in the art are not before making creative work Every other embodiment obtained is put, is fallen within the protection scope of the utility model.

Fig. 1 is a kind of structural schematic diagram of the cleaning device of MVR evaporator of the utility model.Including what is be successively linked in sequence Head tank 1, feed pump 2, preheater 3, separator 9, the purified liquor outlet of the separator 9 connects forced circulation pump 8, described strong The circulation fluid outlet of the circulation fluid import of 8 connecting plate type evaporator 6 of circulating pump processed, the plate-type evaporator 6 is connected to separator 9 It is internal；The vapor interface of the separator 9 connects vapour compression machine 7, and the vapour compression machine 7 is connected to plate-type evaporator 6 Steam inlet is heated, the condensate outlet of plate-type evaporator 6 is connected to drainer 5, and the drainer 5 is connected by draining pump 4 Heat exchange is carried out to preheater 3, and with the raw material of head tank 1；The concentrated solution outlet of the separator 9 passes through concentrate discharging pump 10 are connected to stirred tank 11, and the stirred tank 11 is connected to centrifugal dehydrator 13, centrifugal dehydrator by concentrate transfering material pump 12 13 liquid outlet is connected to mother liquor surge tank 14, and the mother liquor surge tank 14 is connected to head tank 1 by mother liquor pump 15.Its feature It is: is equipped with valve III23 before the concentrate discharging pump, is discharged at the top of the separator 9 by valve I21 and concentrate 10 imports connection is pumped, 9 lower part of separator is connect by water pump 24, valve II22 with condensate draining 26, before the water pump Equipped with filter device 25.

It is equipped with stock solution flow meter 18 on the pipeline of the separator 9 and preheater 3, is set after the stock solution flow meter 18 There is electrically operated valve 19, is equipped with evaporation flowmeter 17, the evaporation stream on pipeline between the separator 9 and vapour compression machine 7 Scale 17, stock solution flow meter 18, electrically operated valve 19 are connect with controlled system with self-regulation 20.20 basis of automatic control system The ingredient of the landfill leachate of the processing sets the ratio for needing the stoste and evaporation capacity that adjust.

Room temperature material liquid enters preheater 3 after the pressurization of feed pump 2 and preheats, and enters separator 9, separation after preheating after stoste Clear liquid in device 9 enters plate-type evaporator 6 after the pressurization of forced circulation pump 8 and heats, and then returns to separator 9 and is flashed, is produced Raw secondary steam enters plate-type evaporator 6 through the pressurization of vapour compression machine 7 heating again and heats to solution, and secondary steam is complete Complete utilization.And enter stirred tank stirring 11 uniformly after the concentrated liquid discharging pump pressurization 10 of solid being enriched in 9 salt leg of separator, Then concentrated liquid transfering material pump 12 is pumped to centrifugal dehydrator 13, and dewatered solids outward transport is further processed, and abjection solution enters Original fluid container 1 is returned to after 15 pressurization of mother liquor pump after mother liquor surge tank 14 to continue to evaporate.Wherein secondary steam condensed water is cold from flowing to Condensate tank 5, the outlet after condensate pump 5 enters preheater 3 and material liquid heat exchange cooling.Pass through stock solution flow meter 18, evaporation flow Table 17, the connection of electrically operated valve 19 form same control system, realize ratio control, landfill leachate stoste lifting capacity and MVR Evaporation capacity cannot keep certain proportional balancing method, improve the working efficiency of MVR vaporising device.

Usually, valve I21, valve II22, water pump 24, filter device 25 are in close state, and valve III23, are in and are beaten Open state when cleaning, closes valve III23, opens valve I21, valve II22, water pump 24, filter device 25, condensed water is under Portion enters, and is gone out by top, is connect by valve II22 with condensate draining 26 by the separator 9, is passed through at the top of separator 9 Valve I21 is connect with 10 import of concentrate discharging pump, can realize circulation sustainable development further using the water in condensate draining 26 Exhibition, it is energy saving, and secondary injury is not caused to equipment, the water impurity after over cleaning can be dehydrated by follow up device Solidification, no chemical contamination.

Claims (5)

1. a kind of cleaning device of MVR evaporator, including head tank, feed pump, preheater, the separator being successively linked in sequence, The purified liquor outlet of separator connects forced circulation pump, and the circulation fluid import of the forced circulation pump connecting plate type evaporator is board-like The circulation fluid outlet of evaporator is connected to separator interior；The vapor interface of separator connects vapour compression machine, vapour compression machine It is connected to the heating steam inlet of plate-type evaporator, the condensate outlet of plate-type evaporator is connected to drainer, and drainer passes through Draining pump is connected to preheater, and carries out heat exchange with the raw material of raw material；The concentrated solution outlet of separator is discharged by concentrate Pump is connected to stirred tank, and stirred tank is connected to centrifugal dehydrator, the liquid outlet connection of centrifugal dehydrator by concentrate transfering material pump To mother liquor surge tank, mother liquor surge tank is connected to head tank by mother liquor pump, it is characterised in that: before the concentrate discharging pump Equipped with valve III, it is connect by valve I with concentrate discharging pump inlet at the top of the separator, the separator lower part passes through Water pump, valve II are connect with condensate draining.

2. a kind of cleaning device of MVR evaporator according to claim 1, it is characterised in that: in the separator and in advance The pipeline of hot device is equipped with stock solution flow meter, electrically operated valve is equipped with after the stock solution flow meter, in the separator and steam Pipeline is equipped with evaporation flowmeter between compressor, and the evaporation flowmeter, stock solution flow meter, electrically operated valve and automatic adjustment are controlled System connection processed.

3. a kind of cleaning device of MVR evaporator according to claim 1, it is characterised in that: be equipped with before the water pump Filter device.

4. a kind of cleaning device of MVR evaporator according to claim 1, it is characterised in that: in the centrifugal dehydrator Side is equipped with sludge bucket.

5. a kind of cleaning device of MVR evaporator according to claim 1, it is characterised in that: the preheater shell side enters Mouth passes through piping connection draining pump.