CN210521803U - Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters - Google Patents
Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters Download PDFInfo
- Publication number
- CN210521803U CN210521803U CN201920930402.XU CN201920930402U CN210521803U CN 210521803 U CN210521803 U CN 210521803U CN 201920930402 U CN201920930402 U CN 201920930402U CN 210521803 U CN210521803 U CN 210521803U
- Authority
- CN
- China
- Prior art keywords
- effect
- heat exchanger
- evaporation
- imitates
- evaporation pan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013078 crystal Substances 0.000 title claims abstract description 30
- 239000007787 solid Substances 0.000 title claims abstract description 11
- 239000002351 wastewater Substances 0.000 title claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims abstract description 147
- 230000008020 evaporation Effects 0.000 claims abstract description 140
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 239000002994 raw material Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000003860 storage Methods 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 5
- 239000005416 organic matter Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 18
- 238000012546 transfer Methods 0.000 description 11
- 230000018044 dehydration Effects 0.000 description 9
- 238000006297 dehydration reaction Methods 0.000 description 9
- 101150006573 PAN1 gene Proteins 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004094 preconcentration Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000011978 dissolution method Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters relates to the technical field of evaporation equipment. The utility model provides a multi-effect evaporator suitable for high salt waste water of crystal solid content high and contain organic matter it contains one and imitates an evaporation pan, one imitates No. two evaporation pans, one imitates coil heat exchanger, one imitates double-layered shell type heat exchanger, two imitates the heat exchanger, raw material liquid preheats the heat exchanger, two imitate the circulating pump, raw material liquid storage ponds, the feed liquor pump, the vacuum pump, catch water, feeding and magma circulating pump, two effect evaporators, the cubic steam condenser, one imitates an evaporation pan and one imitates No. two evaporation pan parallel connection, one imitates that inside one of an evaporation pan sets up an imitates coil heat exchanger, after one imitates No. two evaporation pan inside sets up an effect double-layered shell type heat exchanger and adopts above-mentioned technical scheme, the beneficial effects of the utility model are that: 1. the structure of the device is reasonable, the scale in the pot can be cleaned simply and easily, and the normal production is not influenced; 2. more energy-saving.
Description
Technical Field
The utility model relates to an evaporation equipment technical field, concretely relates to multi-effect evaporator suitable for high salt waste water of crystal solid content high and containing organic matter.
Background
The multi-effect evaporation crystallizer is a common unit operation device in chemical production, has the advantages of wide application range, energy conservation, high efficiency and the like, but also has a plurality of defects: 1. when the evaporated solution reaches a saturated state and crystals are separated out, the crystals are easily separated out because the solution reaches the saturated state, so that the solution is easy to block a heat exchanger when passing through a heat exchange channel, and the production cannot be carried out. And after heat exchange blockage, the problem is difficult to solve by adopting a water dissolution method or manual cleaning, and even the whole heat exchanger is directly damaged. The normal production and economic benefit of the factory are seriously influenced. 2. Because the heat exchanger is easy to block, the evaporation concentration is low, the solid content is low, the yield of centrifugal dehydration products is low, a large amount of mother liquor is generated, energy is wasted, a large amount of impurities are accumulated after the mother liquor returns to an evaporation system for many times, the size and the shape of crystal particles of the products are influenced, the centrifugal dehydration efficiency is deteriorated, and even dehydration cannot be performed. 3. When the conventional multiple-effect and MVR are adopted for evaporation and concentration of waste brine containing a small amount or trace of organic matters, the organic matters are continuously accumulated until the growth environment of salt crystals is deteriorated, the particles are small, the shape is poor, the emulsification is easy, the dehydration is difficult, and the normal operation and the work of production equipment are caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a multi-effect evaporator suitable for the high salt waste water of crystal solid content high and containing organic matter, its structural design is reasonable, can make in the pot scale deposit clearance simple, easily accuse, does not influence normal production moreover, makes these special materials can be suitable for multiple-effect production and reach more energy-conserving purpose.
In order to achieve the above purpose, the utility model adopts the following technical scheme: it comprises a first-effect evaporation pan 1, a first-effect second-effect evaporation pan 2, a first-effect coil type heat exchanger 3, a first-effect jacketed heat exchanger 4, a second-effect heat exchanger 5, a raw material liquid preheating heat exchanger 6, a second-effect circulating pump 7, a raw material liquid storage tank 8, a liquid inlet pump 9, a vacuum pump 10, a steam-water separator 11, a feeding and crystal slurry circulating pump 12, a second-effect evaporator 13 and a tertiary steam condenser 14, wherein the first-effect evaporation pan 1 and the first-effect second-effect evaporation pan 2 are connected in parallel, the first-effect evaporation pan 1 is internally provided with the first-effect coil type heat exchanger 3, the first-effect second-effect evaporation pan 2 is internally provided with the first-effect jacketed type heat exchanger 4, the second-effect heat exchanger 5 and the raw material liquid preheating heat exchanger 6 are fixedly connected, the second-effect heat exchanger 5 and the second-effect circulating pump 7 are fixedly connected, one end of the raw material liquid storage tank 8 is, the tertiary steam condenser 14 is connected to the secondary evaporator 13.
The first-effect first-order evaporation pan 1, the first-effect second-order evaporation pan 2, the first-effect coil type heat exchanger 3 and the first-effect jacketed type heat exchanger 4 form an effective heat exchanger, the first-effect heat exchanger does not adopt an external heat exchanger, but adopts a built-in coil type and an evaporation chamber outer wall jacketed type connection in an evaporation chamber, so that the evaporation chamber and the heat exchanger are designed into an integrated machine structure.
The number of the single-effect evaporation pots is 2 or more than 2.
The utility model discloses a theory of operation: firstly, pumping raw materials into each effect evaporation chamber to a certain liquid level from a raw material liquid pool through a raw material liquid inlet pump, then sequentially opening heat supply medium pipeline switches of each heat exchanger in a first effect first evaporation pot and a first effect second evaporation pot, a stirrer of the first effect first evaporation pot and the first effect second evaporation pot, a secondary steam inlet and outlet switch of a second effect evaporation solution circulating pump and a second effect heat exchanger, a vacuum pump, a feeding and crystal slurry circulating pump, each condenser, a gas-liquid separator and valves on each connecting pipeline, and then regulating and controlling the pressure and the temperature of each effect to enter a normal evaporation concentration state.
The raw material liquid enters an evaporation chamber of the double-effect evaporator after being preheated by the preheater, is sent to the double-effect heat exchanger for heat exchange by the circulating pump and then returns to the double-effect evaporation chamber, the circulation reciprocating work is carried out, the solution in the double-effect evaporation chamber is evaporated and pre-concentrated and then is pumped into the first-effect first evaporation pan and the first-effect second evaporation pan by the pre-concentration feeding and crystal slurry circulating pump, and the continuous feeding or the intermittent feeding can be carried out. After the materials in the first-effect first evaporation pan and the first-effect second evaporation pan are evaporated and concentrated to reach the required concentration, centrifugal dehydration is carried out, and the mother liquor after centrifugal dehydration returns to the first-effect first evaporation pan and the first-effect second evaporation pan for circular evaporation.
After the external heat supply media of the first-effect first-order evaporation pan and the first-effect second-order evaporation pan exchange heat through the first-effect coil tube type heat exchanger and the first-effect jacketed heat exchanger respectively, if the condensed water generated after the water vapor exchanges heat through the heat exchangers enters a condensed water pipeline and then enters a steam-water separator, and then returns to the front working section for use. If the heat conduction oil is heat conduction oil, the heat conduction oil is returned to the boiler system for recycling after being subjected to heat exchange by the one-effect coil pipe type heat exchanger and the one-effect jacketed type heat exchanger. Under the action of a vacuum pump, secondary steam generated in the first-effect evaporation pan and the first-effect second-effect evaporation pan enters the second-effect heat exchanger through a secondary steam pipeline for heat exchange, then enters the steam-water separator through a condensed water pipeline and then returns to the previous working section for use. Under the action of a vacuum pump, tertiary steam generated in the secondary evaporation chamber enters a tertiary steam condenser through a tertiary steam pipeline to be condensed into condensed water, and the condensed water enters a steam-water separator through a pipeline and then returns to the previous working section for use. The cooling water entering the tertiary steam condenser pipe is merged into other condensed water recovery devices through pipelines and returns to the previous working section for use.
When the scaling on the inner wall of the heat exchanger in the first-effect evaporation pan and the first-effect second-effect evaporation pan seriously affects the normal operation, the materials in the first-effect evaporation pan and the second-effect first-effect evaporation pan are sequentially and alternately emptied, raw material liquid or clean water is pumped into the first-effect evaporation pan and the first-effect second-effect evaporation pan by a liquid inlet pump, heat is continuously supplied, the scaling on the surface of the heat exchanger in the first-effect evaporation pan is dissolved, and then the pre-concentrated raw material liquid is continuously evaporated and concentrated in the second-effect evaporation chamber, and the operation is repeatedly circulated.
When the shutdown operation is needed, firstly, the raw material liquid is stopped from entering, valves of pipelines of the raw material liquid are closed, a raw material liquid inlet pump is stopped, the evaporation concentration operation is continued, materials of a double-effect evaporation chamber, a double-effect heat exchanger, a first-effect evaporation pan and a first-effect second-effect evaporation pan are emptied in sequence, then clear water is pumped into the evaporation pans or chambers by the raw material liquid inlet pump, after the circulation operation is carried out for 2-3 hours, the materials scaling on the pipelines, the valves, the evaporation chambers or pans, the heat exchanger and other parts are completely dissolved, and then the shutdown operation is completed after the switches and the valves of the moving parts are closed.
After the technical scheme is adopted, the utility model discloses beneficial effect does: 1. the structure of the device is reasonable, the scaling in the pot can be cleaned simply and easily, and the normal production is not influenced, so that the special materials can be suitable for multi-effect production; 2. the energy is saved because the circulating pump is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the system comprises a first-effect evaporation pan 1, a first-effect second-effect evaporation pan 2, a first-effect coil pipe type heat exchanger 3, a first-effect jacketed heat exchanger 4, a second-effect heat exchanger 5, a raw material liquid preheating heat exchanger 6, a second-effect circulating pump 7, a raw material liquid storage tank 8, a liquid inlet pump 9, a vacuum pump 10, a steam-water separator 11, a feeding and crystal slurry circulating pump 12, a second-effect evaporator 13 and a tertiary steam condenser 14.
Detailed Description
Referring to fig. 1, the technical solution adopted in the present embodiment is (illustrated by taking the two-effect evaporation process as an example): the device comprises a first-effect evaporation pot 1, a first-effect second-effect evaporation pot 2, a first-effect coil type heat exchanger 3, a first-effect jacketed heat exchanger 4, a second-effect heat exchanger 5, a raw material liquid preheating heat exchanger 6, a second-effect circulating pump 7, a raw material liquid storage tank 8, a liquid inlet pump 9, a vacuum pump 10, a steam-water separator 11, a feeding and crystal slurry circulating pump 12, a second-effect evaporator 13 and a tertiary steam condenser 14, wherein the first-effect evaporation pot 1 and the first-effect second-effect evaporation pot 2 are connected in parallel, and a stirring system is additionally arranged in the first-effect evaporation pot to prevent crystals from depositing at the bottom of the pot and prevent a large amount of scales from being formed on a heater to influence heat transfer efficiency, improve evaporated liquid yield and equipment utilization rate, reduce mother liquid amount, save energy consumption and prevent crystal environment. An effective coil type heat exchanger 3 is arranged in an effective first evaporation pan 1, an effective jacketed type heat exchanger 4 is arranged in an effective second evaporation pan 2, a heat exchanger with a built-in coil type and a jacketed type combined mode is adopted, and a method of combining a double coil type or a coil group type and a jacketed type heat exchanger can be adopted under the condition that stirring operation and daily equipment maintenance are not influenced. The built-in coil type means that the coil heater is placed in an evaporation chamber, generally, a single coil type structure is more, and a coil group type and a double coil type are adopted in special cases. Therefore, the heat transfer area of the heat exchanger is increased, and stirring operation and daily equipment maintenance are not influenced. The jacketed heat exchanger is one with semi-pipe coiled jacket or common jacket welded to the outer wall and bottom of the evaporating pot. The design aims to solve the problem of scaling and blockage of the heat exchanger and enlarge the heat transfer area as much as possible to make up for the problem of insufficient heat transfer area. The double-effect heat exchanger 5 is fixedly connected with the raw material liquid preheating heat exchanger 6, the double-effect heat exchanger 5 is fixedly connected with the double-effect circulating pump 7, one end of the raw material liquid storage tank 8 is provided with a liquid inlet pump 9, one end of the vacuum pump 10 is fixedly provided with a steam-water separator 11, the double-effect evaporator 13 is fixedly connected with the feeding and crystal slurry circulating pump 12, and the tertiary steam condenser 14 is connected with the double-effect evaporator 13. The temperature of external heat supply media is increased as much as possible under the condition that the first-effect evaporation pan and the first-effect second-effect evaporation pan adopt the external heat supply condition to allow, for example, superheated steam, heat-conducting oil and other heat transfer media are adopted to increase the heat transfer temperature difference and make up for the defect of insufficient heat transfer area. On the premise of meeting the anti-corrosion requirements and not influencing the product quality, the first-effect evaporation pan and the first-effect second-effect evaporation pan adopt materials with high heat transfer coefficients as heater materials as much as possible to make up the defect of insufficient heat transfer area, such as other materials with high heat transfer coefficients, such as copper, tin, lead, silver and the like, or perform surface anti-corrosion treatment on the surfaces of the materials to adapt to the anti-corrosion requirements. The pressure in the first-effect first-order evaporating pot and the first-effect second-order evaporating pot is ensured to be larger than or equal to the normal pressure as far as possible, and the concentration of the evaporating solution is higher and better under the condition that the freezing pot is not influenced and the pipeline is blocked, so that the design purpose is as follows: firstly, the boiling point temperature of the evaporated solution is increased, and the thermal crystallization material has the characteristics of higher crystallization temperature, higher temperature, coarse crystallization particles, good shape, convenience for dehydration and separation, reduction of the free water content on the surface of the dehydrated crystal, saving of later-stage drying energy and improvement of the capacity of drying equipment; secondly, the higher the concentration is, the more the boiling temperature of the evaporation solution rises, which is beneficial to the volatilization and escape of organic matters in the solution to be more thorough, reduces the viscosity of the evaporation solution, improves the crystal growth environment of the evaporation solution, controls the crystal of the evaporation solution in a good crystallization state, prevents the emulsification phenomenon caused by the fine crystal particles of the thermal crystallization material, and solves the problem that the production equipment is not operated normally. Two or more single-effect evaporation pots can be used in parallel, and the design aims are as follows: firstly, the heat exchange area of the heat exchanger is increased, because the heat exchangers with built-in coil pipes and jacketed type connection are arranged in the evaporation chamber and on the outer wall of the evaporation chamber, the heat exchange area cannot be made very large due to the limitation of space and operation conditions, and the heat exchange area of the later-effect evaporator can be made very large by adopting an external heat exchanger, so that a single evaporation chamber is usually adopted, and the problem that the heat exchange area is not enough can only be compensated by using the number of the single evaporation chamber; secondly, when the surface of the heat exchanger and the scale in the boiler need to be cleaned, the single-effect evaporation boiler can be cleaned intermittently and alternately without influencing the normal production. The main method for cleaning the surface of the heat exchanger and the scale in the boiler is as follows: when an evaporation pan needs to clean the surface of the heat exchanger and scale in the pan, after materials in the evaporator are placed, the evaporation solution stock solution or clear water is added into the evaporator, and the evaporation solution stock solution and the clear water can dissolve the scale on the surface of the heat exchanger and in the evaporation pan. When the dissolution is complete, the multi-effect conventional operation is continued. The design ensures that the scale in the boiler is easy to clean and control, the normal production is not influenced, and the normal operation can be realized no matter how high the concentration or solid content of the evaporating solution in the evaporating boiler is.
The first-effect first-order evaporation pan 1, the first-effect second-order evaporation pan 2, the first-effect coil type heat exchanger 3 and the first-effect jacketed type heat exchanger 4 form an effective heat exchanger, the first-effect heat exchanger does not adopt an external heat exchanger, but adopts a built-in coil type and an evaporation chamber outer wall jacketed type connection in an evaporation chamber, so that the evaporation chamber and the heat exchanger are designed into an integrated machine structure.
The number of the single-effect evaporation pots is 2 or more than 2, and the purpose is as follows: 1. mainly for matching and balancing the evaporation capacity and the heat transfer area required by the heat exchanger of the back effect evaporator. 2. The device is used for batch operation and better cleaning crystal scales on the heat exchanger.
The utility model discloses a theory of operation: firstly, pumping raw materials into each effect evaporation chamber to a certain liquid level from a raw material liquid pool through a raw material liquid inlet pump, then sequentially opening heat supply medium pipeline switches of each heat exchanger in a first effect first evaporation pot and a first effect second evaporation pot, a stirrer of the first effect first evaporation pot and the first effect second evaporation pot, a secondary steam inlet and outlet switch of a second effect evaporation solution circulating pump and a second effect heat exchanger, a vacuum pump, a feeding and crystal slurry circulating pump, each condenser, a gas-liquid separator and valves on each connecting pipeline, and then regulating and controlling the pressure and the temperature of each effect to enter a normal evaporation concentration state.
The raw material liquid enters an evaporation chamber of the double-effect evaporator after being preheated by the preheater, is sent to the double-effect heat exchanger for heat exchange by the circulating pump and then returns to the double-effect evaporation chamber, the circulation reciprocating work is carried out, the solution in the double-effect evaporation chamber is evaporated and pre-concentrated and then is pumped into the first-effect first evaporation pan and the first-effect second evaporation pan by the pre-concentration feeding and crystal slurry circulating pump, and the continuous feeding or the intermittent feeding can be carried out. And (3) evaporating and concentrating the materials in the first-effect evaporator and the first-effect second-effect evaporator to reach the required concentration, performing centrifugal dehydration, and returning the mother liquor subjected to centrifugal dehydration to the first-effect evaporator and the first-effect second-effect evaporator for circulating evaporation.
After the external heat supply media of the first-effect first-order evaporation pan and the first-effect second-order evaporation pan exchange heat through the first-effect coil tube type heat exchanger and the first-effect jacketed heat exchanger respectively, if the condensed water generated after the water vapor exchanges heat through the heat exchangers enters a condensed water pipeline and then enters a steam-water separator, and then returns to the front working section for use. If the heat conduction oil is heat conduction oil, the heat conduction oil is returned to the boiler system for recycling after being subjected to heat exchange by the one-effect coil pipe type heat exchanger and the one-effect jacketed type heat exchanger. Under the action of a vacuum pump, secondary steam generated in the first-effect evaporation pan and the first-effect second-effect evaporation pan enters the second-effect heat exchanger through a secondary steam pipeline for heat exchange, then enters the steam-water separator through a condensed water pipeline and then returns to the previous working section for use. Under the action of a vacuum pump, tertiary steam generated in the secondary evaporation chamber enters a tertiary steam condenser through a tertiary steam pipeline to be condensed into condensed water, and the condensed water enters a steam-water separator through a pipeline and then returns to the previous working section for use. The cooling water entering the tertiary steam condenser pipe is merged into other condensed water recovery devices through pipelines and returns to the previous working section for use.
When the scaling on the inner wall of the heat exchanger in the first-effect evaporation pan and the first-effect second-effect evaporation pan seriously affects the normal operation, the materials in the first-effect evaporation pan and the second-effect first-effect evaporation pan are sequentially and alternately emptied, raw material liquid or clean water is pumped into the first-effect evaporation pan and the first-effect second-effect evaporation pan by a liquid inlet pump, heat is continuously supplied, the scaling on the surface of the heat exchanger in the first-effect evaporation pan is dissolved, and then the pre-concentrated raw material liquid is continuously evaporated and concentrated in the second-effect evaporation chamber, and the operation is repeatedly circulated.
When the shutdown operation is needed, firstly, the raw material liquid is stopped from entering, valves of pipelines of the raw material liquid are closed, a raw material liquid inlet pump is stopped, the evaporation concentration operation is continued, materials of a double-effect evaporation chamber, a double-effect heat exchanger, a first-effect evaporation pan and a first-effect second-effect evaporation pan are emptied in sequence, then clear water is pumped into the evaporation pans or chambers by the raw material liquid inlet pump, after the circulation operation is carried out for 2-3 hours, the materials scaling on the pipelines, the valves, the evaporation chambers or pans, the heat exchanger and other parts are completely dissolved, and then the shutdown operation is completed after the switches and the valves of the moving parts are closed.
After the technical scheme is adopted, the utility model discloses beneficial effect does: the structure of the device is reasonable, the scale in the pot can be cleaned simply and easily, and the normal production is not affected, so that the special materials can be suitable for multiple-effect production and achieve the aim of saving more energy.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. The utility model provides a multi-effect evaporator suitable for high salt waste water of crystal solid content and organic matter, its characterized in that: it comprises a first-effect evaporation pan (1), a first-effect second-effect evaporation pan (2), a first-effect coil type heat exchanger (3), a first-effect jacketed heat exchanger (4), a second-effect heat exchanger (5), a raw material liquid preheating heat exchanger (6), a second-effect circulating pump (7), a raw material liquid storage pool (8), a liquid inlet pump (9), a vacuum pump (10), a steam-water separator (11), a feeding and crystal slurry circulating pump (12), a second-effect evaporator (13) and a tertiary steam condenser (14), wherein the first-effect evaporation pan (1) is connected with the first-effect second-effect evaporation pan (2) in parallel, the first-effect coil type heat exchanger (3) is arranged in the first-effect evaporation pan (1), the first-effect jacketed heat exchanger (4) is arranged in the first-effect second-effect evaporation pan (2), the second-effect heat exchanger (5) is fixedly connected with the raw material liquid preheating heat exchanger (6, a liquid inlet pump (9) is arranged at one end of a raw material liquid storage tank (8), a steam-water separator (11) is fixedly arranged at one end of a vacuum pump (10), a secondary evaporator (13) is fixedly connected with a feeding and crystal slurry circulating pump (12), and a tertiary steam condenser (14) is connected with the secondary evaporator (13).
2. The multi-effect evaporator suitable for the high-salinity wastewater with high solid content of crystals and organic matters as claimed in claim 1, characterized in that: the first-effect first-number evaporation pan (1), the first-effect second-number evaporation pan (2), the first-effect coil type heat exchanger (3) and the first-effect jacketed type heat exchanger (4) form an effective heat exchanger, the first-effect heat exchanger does not adopt an external heat exchanger, but adopts a built-in coil type and an evaporation chamber outer wall jacket type combination in an evaporation chamber, so that the evaporation chamber and the heat exchanger are designed into an integrated machine structure.
3. The multi-effect evaporator suitable for the high-salinity wastewater with high solid content of crystals and organic matters as claimed in claim 1, characterized in that: the number of the single-effect evaporation pots is 2 or more than 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920930402.XU CN210521803U (en) | 2019-06-20 | 2019-06-20 | Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920930402.XU CN210521803U (en) | 2019-06-20 | 2019-06-20 | Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210521803U true CN210521803U (en) | 2020-05-15 |
Family
ID=70595443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920930402.XU Active CN210521803U (en) | 2019-06-20 | 2019-06-20 | Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210521803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124341A (en) * | 2019-06-20 | 2019-08-16 | 刘向东 | It is a kind of suitable for crystalline solid solid content is high and the multi-effect evaporator of the high-salt wastewater containing organic matter |
-
2019
- 2019-06-20 CN CN201920930402.XU patent/CN210521803U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124341A (en) * | 2019-06-20 | 2019-08-16 | 刘向东 | It is a kind of suitable for crystalline solid solid content is high and the multi-effect evaporator of the high-salt wastewater containing organic matter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111362492A (en) | Double-effect MVR evaporation treatment method | |
| CN105833563A (en) | Non-scaling heating assembly and evaporative crystallization device with same | |
| CN103739025A (en) | High-efficiency and energy-saving multi-effect evaporator system | |
| CN110124341A (en) | It is a kind of suitable for crystalline solid solid content is high and the multi-effect evaporator of the high-salt wastewater containing organic matter | |
| CN113697884A (en) | Potassium, sodium chloride salt mixture waste water composite MVR evaporation crystallization separation method | |
| CN210521803U (en) | Multi-effect evaporator suitable for high-salinity wastewater with high solid content of crystals and organic matters | |
| CN212024822U (en) | Evaporation crystallization system of high salt waste water of food pickling | |
| CN110723857A (en) | High-salinity water concentration and crystallization treatment system and process | |
| CN211971803U (en) | Novel materialized wastewater triple-effect evaporation system | |
| CN213771402U (en) | An evaporative crystallization salt making device | |
| CN105129890A (en) | Evaporating crystallizer | |
| CN207785992U (en) | A kind of bronze production Oslo-type crystallizing evaporator | |
| CN203346096U (en) | Sodium-sulfate brine sextuple-effect evaporation sodium nitrate production device | |
| CN215136953U (en) | Double-effect evaporation system | |
| CN214936167U (en) | Low-temperature negative-pressure evaporation concentration system applied to wastewater zero discharge device | |
| CN212039090U (en) | Switchable two-effect evaporation concentration crystallizer | |
| CN203319719U (en) | Evaporative crystallization device of manganese sulfate | |
| CN205759823U (en) | Non-scaling heats assembly, the evaporated crystallization device comprising it | |
| CN210261447U (en) | A kind of sodium chloride and sodium sulfate ultrasonic evaporation crystallization salt separation system | |
| CN212998482U (en) | Cooling crystallizer | |
| CN205294881U (en) | Be applied to sextuple -effect evaporation crystallization device of industrial waste water zero release | |
| CN207203495U (en) | Suitable for high-salt concentrated degree and the MVR crystallizing evaporators for thering is crystal to separate out | |
| CN209081464U (en) | A kind of high-salt wastewater positive pressure evaporated crystallization device based on the driving of steam power plant's heat source | |
| CN215939074U (en) | Large granule salt crystallizer | |
| CN114849258B (en) | Double-effect evaporator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |