CN218145933U - Integral type direct contact evaporation plant - Google Patents
Integral type direct contact evaporation plant Download PDFInfo
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- CN218145933U CN218145933U CN202221646465.0U CN202221646465U CN218145933U CN 218145933 U CN218145933 U CN 218145933U CN 202221646465 U CN202221646465 U CN 202221646465U CN 218145933 U CN218145933 U CN 218145933U
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- combustion chamber
- demister
- direct contact
- evaporator
- evaporimeter
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- 238000001704 evaporation Methods 0.000 title claims abstract description 62
- 230000008020 evaporation Effects 0.000 title claims abstract description 56
- 238000002485 combustion reaction Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000012141 concentrate Substances 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000003517 fume Substances 0.000 claims abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 21
- 239000003546 flue gas Substances 0.000 claims description 21
- 239000000779 smoke Substances 0.000 claims description 18
- 239000010802 sludge Substances 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000003595 mist Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses an integral type direct contact evaporation plant, including the evaporimeter, the bottom of evaporimeter is equipped with the evaporating zone with the concentrate contact, the evaporimeter is inside to be located the left and right sides of evaporating zone top is equipped with exhaust chamber and combustion chamber, the top of exhaust chamber is provided with the pipe of discharging fume, the vertical combustion chamber of installing of intermediate position in combustion chamber, the combustor is installed at the combustion chamber top, the distributor is installed to the combustion chamber bottom, the inside position that is located concentrate liquid level top 300-1000mm of evaporimeter transversely is provided with first defroster. The utility model discloses an integral type direct contact evaporation plant has high integrated nature, promotes evaporation plant's play water index, and the guarantee is at the stability of the system under the undulant condition of operating mode, has realized the simplification of a whole set of direct contact evaporation system, reducible system investment and area.
Description
Technical Field
The utility model relates to a technical field of the concentrated solution of leachate handles technique especially relates to an integral type direct contact evaporation plant.
Background
In a household garbage incineration power plant or a household garbage landfill, water treatment is an important link, is mainly used for treating garbage leachate, and generally adopts a process combination mode of pretreatment, biochemistry and advanced treatment. During the advanced treatment of leachate, membrane concentrate is produced which accounts for about 40% of the total leachate. The concentrated percolate is a difficult problem in the water treatment industry due to the characteristics of high salt content, high-concentration organic matters, poor biodegradability and the like. Direct contact evaporation has been proven to be an effective means for treating percolate concentrate due to its high heat transfer efficiency, simple structure, and wide applicability.
CN1263530C has proposed the integral type submerged combustion evaporator of concentrated filtration liquid, and the combustion chamber is located the central point of evaporator, and the flue gas is put through under the liquid through the combustion chamber directly, and it has several layers of gas distribution boards and gas distribution weir to distribute in the evaporation chamber, has increased the area of contact of high temperature gas and liquid, has promoted evaporation efficiency. The overall structure of the equipment is simple, and the main problems exist: 1. the combustion chamber is located the top center of evaporimeter, because liquid top needs certain gas-liquid separation space, consequently leads to the combustion chamber whole longer, on the one hand because the combustion chamber needs the inside lining refractory material, leads to the whole weight of equipment to increase, on the other hand has also reduced the initial temperature of flue gas, has increased the heat loss of equipment. 2. The gas distribution plate is arranged in the evaporated liquid to increase the gas-liquid contact area, so that the bubbles at the outlet are large and are divided by the gas distribution plate, so that the internal disturbance of the liquid is severe, and the whole vibration of the combustion chamber and even the equipment is large, which is not beneficial to the long-term operation of the equipment. 3. The gas-liquid separation of the evaporator depends on the gravity natural separation of the upper space, and a large amount of fog drops carried in the flue gas are easy to cause unqualified water outlet and secondary pollution during operation.
CN113511697A proposes an integrated asynchronous submerged combustion evaporator and a combined evaporation device. The invention divides the evaporator into a feeding area, a heat transfer area and an evaporator area by a clapboard, high-temperature flue gas or mixed gas of fuel gas and air enters the evaporator from the middle heat transfer area and enters the feeding area to preheat percolate concentrated solution. Meanwhile, the evaporation area is connected with a vacuum pump to form negative pressure evaporation. The evaporator is externally connected with a compressor, and steam generated by evaporation enters the compressor, is compressed and heated and then enters the evaporator for heating liquid. There are major problems: 1. the interior of the evaporator, particularly in the medium and high temperature regions where contact is made with the permeate concentrate, is prone to fouling, and partitioning the evaporator into relatively complex, small spaces by baffles results in inconvenient cleaning. 2. The evaporation area is not provided with a space and a device for gas-liquid separation, and pollutants at the outlet of the evaporator easily exceed the standard and need to be treated by adding a post-treatment device. 3. Because flue gas or the mixture of combustible gas and air lets in the evaporimeter and carries out the heat transfer, lead to having a large amount of noncondensable gas at the evaporimeter export, cause and need consume energy and rise after getting into the compressor, and be unfavorable for the operation of compressor, though can retrieve certain heat, the cost can rise on the contrary.
According to the above summaries, the efficiency and cost of the direct contact evaporation unit is currently mainly optimised when working with permeate concentrates. Combine the direct contact evaporation plant structure of traditional basis, present main problem is: 1. the direct contact type evaporation device has no effective gas-liquid separation device, a subsequent treatment process is needed, otherwise, effluent water does not reach the standard and secondary pollution is generated, so that the investment cost and the occupied area of the whole system are increased. A demister is simply arranged in an outlet flue of part of equipment, and the same problem exists because the flow velocity of flue gas is high, and the demisting effect is not obvious. 2. The high-temperature heat source channel is generally designed in the middle position above the evaporation device, and the gas-liquid separation space requirement (low flow speed and certain time are required) causes the combustion chamber to be longer, so that the weight, cost and heat dissipation of equipment are increased, and the overall cost of the system is increased.
Aiming at the problems existing in the percolate concentrated solution treatment field and the direct contact type evaporation device at present, the patent provides an integrated direct contact type evaporation device structure, an air inlet structure is optimized while an effective gas-liquid separation device is integrated, the problems are solved, the system stability under the condition of working condition fluctuation is guaranteed, and the simplification of the whole set of direct contact type evaporation system is realized.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to above-mentioned prior art not enough, and provide an integral type direct contact evaporation plant.
In order to achieve the above object, the utility model discloses an integral type direct contact evaporation plant's concrete technical scheme as follows:
the utility model provides an integral type direct contact evaporation plant, includes the evaporimeter, the bottom of evaporimeter is equipped with the evaporating zone with the concentrate contact, the evaporimeter is inside to be located the left and right sides of evaporating zone top is equipped with smoke exhaust cavity and combustion chamber, smoke exhaust cavity's top is provided with the pipe of discharging fume, the vertical combustion chamber that installs in intermediate position in combustion chamber, the combustor is installed to the combustion chamber top, the distributor is installed to the combustion chamber bottom, the inside position that is located concentrate liquid level top 300-1000mm of evaporimeter transversely is provided with first defroster.
Further, a sludge discharge port is formed in the bottom end of the evaporator, and a stirrer is installed at the position, close to the sludge discharge port, of the bottom of the evaporator.
Furthermore, a baffle is arranged between the smoke exhaust cavity and the combustion cavity.
Further, the distributor comprises at least one pipe with an opening at the bottom.
Furthermore, a flushing device is transversely arranged at a position above the first demister in the evaporator.
Further, the first demister adopts a baffle plate type demister.
Further, a second demister is transversely arranged in the evaporator at a position 800mm above the first demister.
Further, the second demister is a flat plate demister, a wire mesh demister or a tube bundle demister.
Further, a preheater is arranged on one side of the evaporator, the smoke exhaust pipe is connected with the preheater through a smoke pipeline, and the preheater is connected with a flushing device through a pipeline.
Further, the height of the combustion chamber is lower than that of the smoke exhaust chamber.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the burner and the combustion chamber are arranged on one side of the top of the evaporation area of the evaporation device, so that the length of the combustion chamber and the weight of equipment are reduced, the heat loss is reduced, and the mechanical stability of the equipment is improved;
2. on the basis of shortening the length of the combustion chamber, an effective gas-liquid separation device is integrated. A demister is additionally arranged under the condition of low flue gas flow velocity, the first layer removes particle mist, a flushing device is matched, the second layer further reduces the mist carried by the flue gas, and outlet condensate water is guaranteed to reach the standard;
3. the bottom of the evaporation device is provided with a stirrer to prevent the salt mud from silting and blocking a mud discharge port;
generally speaking, direct contact evaporation is a common and effective method in the prior art for disposing percolate concentrated solution, and an evaporation device is a core device in a system and is directly related to the operation stability of the system, the process disposal cost and the like. In the actual project of processing the percolate concentrated solution, because of the structural limitation of an evaporation device, equipment such as a separation tower, a washing tower and the like is generally required to be connected behind an evaporator, so that the cost of the whole system is increased, and the occupied area is increased. The utility model discloses having carried out certain optimization improvement on the basis of traditional direct contact evaporation plant structure, having proposed the structural style after evaporation plant optimizes, having the integrated nature of height, promoting evaporation plant's play water index, the guarantee is at the stability of system under the undulant condition of operating mode, has realized the simplification of a whole set of direct contact evaporation system, but reduction system investment and area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention;
the notation in the figure is: 1. an evaporator; 2. a burner; 3. a combustion chamber; 4. a distributor; 5. a stirrer; 6. a preheater; 7. a baffle plate; 8. a first demister; 9. a flushing device; 10. a second demister.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, "first", "second", and the like do not indicate the degree of importance of the component parts, and thus, should not be construed as limiting the present invention. The specific dimensions used in the present embodiment are only for illustrating the technical solutions, and do not limit the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution: an integrated direct contact type evaporation device comprises an evaporator 1, wherein the direct contact type evaporation refers to an evaporation mode that a high-temperature heat source directly contacts with liquid, the liquid is stirred and heated, and a solvent is heated and vaporized; the bottom of the evaporator 1 is provided with an evaporation area which is contacted with the concentrated solution, the upper part of the evaporator 1 is provided with a gas-liquid separation area, the concentrated solution is also called percolate concentrated solution which is residual liquid intercepted by a reverse osmosis membrane and a nanofiltration membrane in the process of advanced treatment of the percolate after the garbage percolate is biodegraded; the left side and the right side of the evaporator 1 above the evaporation area are provided with a smoke exhaust cavity and a combustion cavity, the top of the smoke exhaust cavity is provided with a smoke exhaust pipe, the middle position of the combustion cavity is vertically provided with a combustion chamber 3, and the evaporation area on one side does not need to consider the problem of gas-liquid separation, so that the length of the combustion chamber 3 is reduced; the top of the combustion chamber 3 is provided with a combustor 2, the bottom of the combustion chamber 3 is provided with a distributor 4, a flue gas distribution device, namely the distributor 4, is generally designed in the evaporator before high-temperature flue gas is introduced into the sewage to be treated, the flue gas can be distributed in the evaporator uniformly, the heat exchange efficiency is improved, and the distributor belongs to a part of the evaporator; the evaporator 1 is internally provided with a first demister 8 transversely at a position 300-1000mm above the liquid level of the concentrated solution, namely, the first demister 8 is arranged at a position 300-1000mm above the evaporation liquid level of the gas-liquid separation zone, and the demister is a device for collecting mist particles and slurry drops carried by flue gas so as to remove dissolved pollutants in the liquid drops.
Further, a sludge discharge port is formed in the bottom end of the evaporator 1, and a stirrer 5 is installed at the bottom of the evaporator 1 close to the sludge discharge port; the stirrer 5 can be started under the condition of concentrating to a high multiplying power, and prevents excessive salt mud from silting the bottom of the evaporator, so that a mud discharge port at the bottom is blocked, and mud discharge is not smooth.
Furthermore, a baffle 7 is arranged between the smoke exhaust cavity and the combustion cavity, so that liquid can be effectively prevented from splashing to the outer wall of the combustion chamber 3 to be quickly evaporated at high temperature, and salt deposition and scaling are caused.
Further, the distributor 4 comprises at least one pipeline with holes at the bottom, that is, the distributor 4 consists of 1 or more pipelines with holes at the bottom, and the high-temperature flue gas is uniformly contacted with the concentrated solution for heat exchange after being sprayed out through the holes at the bottom.
Further, the inside position that is located first defroster 8 top of evaporimeter 1 transversely is provided with washing unit 9, and washing unit 9 is as emergent facility, can wash when first defroster 8 takes place to block up, and the comdenstion water in the water can utilizing the flue gas washes, also can introduce other cleaners by the external world.
Further, the first demister 8 generally adopts a flat plate structure, preferably a baffle plate type demister, and is mainly used for condensing and separating large mist foam in the flue gas.
Further, the position that is located 800mm above first defroster 8 inside 1 evaporimeter transversely is provided with second defroster 10, and further get rid of less droplet in the flue gas, ensures that the flue gas comdenstion water is up to standard when the operating mode is unstable, prevents secondary pollution.
Further, the second demister 10 is a flat plate demister, a wire mesh demister, or a tube bundle demister.
Further, a preheater 6 is arranged on one side of the evaporator 1, the smoke exhaust pipe is connected with the preheater 6 through a smoke pipeline, and the preheater 6 is connected with a washing device 9 through a pipeline; the pretreated stock solution firstly exchanges heat with the flue gas generated by evaporation through a preheater arranged at the outer side of the evaporator 1, and the waste heat in the flue gas is recycled; the flue gas discharges up to standard after the heat transfer, and the comdenstion water that produces through the heat transfer can partly be used as the defroster and wash the water, also can be used to the reuse water in factory and carry out the reuse.
Further, the height of the combustion cavity is lower than that of the smoke exhaust cavity.
The working principle is as follows:
1. in order to solve the problems of overlong length, serious heat loss and insufficient equipment stability of the existing combustion chamber 3, the evaporation device is partitioned, and a structure that the combustor 2 and the combustion chamber 3 are placed on one side of an evaporation area is adopted.
2. Through two-layer defroster of inside design of evaporimeter, it is integrative with the evaporimeter to integrate effectual gas-liquid separation function, has promoted 1 water index of evaporimeter, has reduced complete system investment cost and area.
3. In order to solve the problem that the salt mud at the bottom can be deposited and block a mud discharge port during long-time operation, a stirrer 5 is additionally arranged at the bottom of the evaporation device.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (10)
1. An integral type direct contact evaporation plant which characterized in that: including evaporimeter (1), the bottom of evaporimeter (1) is equipped with the evaporating zone that contacts with the concentrate, evaporimeter (1) inside is located the left and right sides of evaporating zone top is equipped with smoke exhaust cavity and combustion chamber, smoke exhaust cavity's top is provided with the pipe of discharging fume, the vertical combustion chamber (3) of installing of intermediate position in combustion chamber, combustor (2) are installed at combustion chamber (3) top, distributor (4) are installed to combustion chamber (3) bottom, evaporimeter (1) inside is located concentrate liquid level top 300-1000 mm's position and transversely is provided with first defroster (8).
2. The integrated direct-contact evaporation device according to claim 1, wherein a sludge discharge port is arranged at the bottom end of the evaporator (1), and an agitator (5) is arranged at the bottom of the evaporator (1) near the sludge discharge port.
3. The integrated direct contact evaporation device according to claim 1, wherein a baffle (7) is provided between the smoke evacuation chamber and the combustion chamber.
4. Integrated direct contact evaporation device according to claim 1, wherein the distributor (4) comprises at least one tube with bottom opening.
5. Integrated direct-contact evaporation device according to claim 1, wherein a washing device (9) is arranged laterally inside the evaporator (1) above the first demister (8).
6. An integrated direct-contact evaporation device according to claim 1, wherein the first demister (8) is a baffle demister.
7. An integrated direct contact evaporation device according to claim 1, wherein a second demister (10) is arranged laterally inside the evaporator (1) at a position 800mm above the first demister (8).
8. The integrated direct-contact evaporation device of claim 7, wherein the second demister (10) is a plate demister, a wire mesh demister, or a tube bundle demister.
9. The integrated direct contact evaporation plant according to claim 1, wherein a preheater (6) is provided at one side of the evaporator (1), the smoke exhaust pipe is connected to the preheater (6) through a flue gas duct, and the preheater (6) is connected to the flushing device (9) through a duct.
10. The integrated direct contact evaporation device of claim 1, wherein the height of the combustion chamber is lower than the height of the smoke evacuation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221646465.0U CN218145933U (en) | 2022-06-28 | 2022-06-28 | Integral type direct contact evaporation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221646465.0U CN218145933U (en) | 2022-06-28 | 2022-06-28 | Integral type direct contact evaporation plant |
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| Publication Number | Publication Date |
|---|---|
| CN218145933U true CN218145933U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221646465.0U Active CN218145933U (en) | 2022-06-28 | 2022-06-28 | Integral type direct contact evaporation plant |
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| CN (1) | CN218145933U (en) |
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- 2022-06-28 CN CN202221646465.0U patent/CN218145933U/en active Active
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