CN213416567U - Ammonia nitrogen wastewater treatment device - Google Patents
Ammonia nitrogen wastewater treatment device Download PDFInfo
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- CN213416567U CN213416567U CN202021206133.1U CN202021206133U CN213416567U CN 213416567 U CN213416567 U CN 213416567U CN 202021206133 U CN202021206133 U CN 202021206133U CN 213416567 U CN213416567 U CN 213416567U
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Abstract
The utility model discloses an ammonia nitrogen effluent treatment plant, include: the ammonia still is provided with a water inlet pipe and a water outlet pipe, wastewater to be treated is guided into the ammonia still through the water inlet pipe for deamination treatment, and produced water after deamination treatment is guided out through the water outlet pipe; the preheater is used for exchanging heat between the wastewater in the water inlet pipe and the produced water in the water outlet pipe so as to raise the temperature of the wastewater in the water inlet pipe and lower the temperature of the produced water in the water outlet pipe; the seed crystal adder is used for adding seed crystals to the water inlet pipe, and the seed crystals and the wastewater in the water inlet pipe are mixed and then enter the preheater for preheating; and the solid-liquid separator is arranged between the preheater and the ammonia still, the wastewater in the water inlet pipe enters the solid-liquid separator after being preheated by the preheater, and solid impurities in the wastewater are removed through solid-liquid separation treatment. According to the embodiment of the utility model provides a can effectively avoid the scale deposit problem of pre-heater and water intake pipe, can reduce the inside scale deposit of ammonia still again and block up the risk.
Description
Technical Field
The utility model relates to an ammonia nitrogen waste water technical field particularly relates to an ammonia nitrogen effluent treatment plant.
Background
The landfill leachate contains a large amount of solid suspended particles and has high hardness, and calcium carbonate, calcium sulfate and other impurities generated in the ammonia distillation process are easy to deposit on the surfaces of tower plates or fillers when flowing through the tower plates or the fillers, so that the tower is blocked, and the operation of the process is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one among the above-mentioned problem and provide the utility model discloses, it discloses an ammonia nitrogen effluent treatment plant, can reduce the problem that ammonia still scale deposit of ammonia tower blockked up among the ammonia nitrogen effluent ammonia distillation treatment process, be particularly useful for hardness height, contain a large amount of suspended solids, and the high landfill leachate's of hardness processing.
Specifically, the utility model discloses an aspect provides an ammonia nitrogen effluent treatment plant, and it includes:
the ammonia still comprises an ammonia still, a water inlet pipe, a water outlet pipe and a steam supply unit, wastewater to be treated is led into the ammonia still through the water inlet pipe for deamination treatment, water produced after deamination treatment is led out through the water outlet pipe, and the steam supply unit is used for providing steam for deamination treatment for the ammonia still;
the preheater is used for exchanging heat between the wastewater in the water inlet pipe and the produced water in the water outlet pipe so as to raise the temperature of the wastewater in the water inlet pipe and lower the temperature of the produced water in the water outlet pipe;
the seed crystal adder is used for adding seed crystals to the water inlet pipe, and the seed crystals and the wastewater in the water inlet pipe are mixed and then enter the preheater for preheating;
and the solid-liquid separator is arranged between the preheater and the ammonia still, the wastewater in the water inlet pipe enters the solid-liquid separator after being preheated by the preheater, and solid impurities in the wastewater are removed through solid-liquid separation treatment.
In an embodiment of the present invention, the mass fraction ratio of the seed crystal to the wastewater is 0.1% to 10%.
In an embodiment of the present invention, the solid-liquid separator includes a filter, a centrifugal settling machine or a gravity settling machine.
In an embodiment of the present invention, the present invention further includes:
and the alkali liquor supply unit is communicated with the ammonia still and is used for adding alkali liquor into the ammonia still.
In an embodiment of the present invention, the method includes:
the tower top condenser is used for condensing ammonia-containing gas generated by the ammonia still deamination treatment;
and the reflux tank is used for collecting the liquid generated after the treatment of the tower top condenser and reintroducing the liquid into the ammonia still.
In an embodiment of the present invention, the present invention further includes:
and the ammonia water condenser is communicated with the reflux tank and the tower top condenser and is used for condensing the ammonia-containing gas condensed by the tower top condenser so as to convert the ammonia-containing gas into ammonia water.
In an embodiment of the present invention, the method includes:
and the water outlet cooler is communicated with the preheater and is used for cooling the water produced after heat exchange of the preheater.
The utility model provides an ammonia nitrogen effluent treatment plant adds the seed crystal on the pre-heater inlet line, makes waste water because of heating up in the pre-heater and molecule such as calcium carbonate, calcium sulfate that appear is attached to the crystal of suspension to add between pre-heater and ammonia still and set up solid-liquid separation equipment, get rid of the solid that appears in the waste water, can effectively avoid the scale deposit problem of pre-heater and inlet line like this, can reduce the inside scale deposit of ammonia still and block up the risk again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and 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 effort.
Figure 1 shows according to the utility model discloses an embodiment's ammonia nitrogen effluent treatment plant's schematic structure diagram.
Description of reference numerals:
100 ammonia nitrogen wastewater treatment device
101 ammonia still
102 steam supply unit
103 alkali liquor supply unit
104 preheater
105 seed crystal adder
106 solid-liquid separator
107 water outlet cooler 107
108 overhead condenser 108
109 reflux drum 109
110 ammonia water condenser
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity to indicate like elements throughout.
It will be understood that when an element or layer is referred to as being "on" …, "adjacent to …," "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to the other elements or layers or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on …," "directly adjacent to …," "directly connected to" or "directly coupled to" other elements or layers, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.
Spatial relationship terms such as "under …", "under …", "below", "under …", "above …", "above", and the like, may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, then elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "below …" and "below …" can encompass both an orientation of up and down. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In order to thoroughly understand the present invention, a detailed structure will be provided in the following description in order to explain the technical solution provided by the present invention. Alternative embodiments of the invention are described in detail below, however, other embodiments of the invention are possible in addition to these detailed descriptions.
Before the introduction, the meaning of the terms in this text is explained.
An ammonia still: a rectifying tower for carrying out deamination treatment on the wastewater containing ammonia nitrogen.
As mentioned above, landfill leachate contains a large amount of solid suspended particles and has high hardness, and calcium carbonate, calcium sulfate and other impurities generated in the ammonia distillation process are easy to deposit on the surfaces of the tower plates or the fillers when flowing through the tower plates or the fillers, so that the tower is blocked, and the operation of the process is seriously influenced. To this problem, the utility model provides an ammonia nitrogen effluent treatment plant for reducing ammonia still scale deposit jam among ammonia nitrogen waste water ammonia distillation treatment process is particularly useful for the hardness height, contains a large amount of suspended solids, and the landfill leachate that hardness is high.
The ammonia nitrogen wastewater treatment device 100 according to an embodiment of the present invention will be described in detail with reference to fig. 1.
As shown in fig. 1, the ammonia nitrogen wastewater treatment device 100 provided by this embodiment comprises an ammonia still 101, a steam supply unit 102, an alkali liquor supply unit 103, a preheater 104, a seed crystal adder 105, a solid-liquid separator 106, an effluent cooler 107, an overhead condenser 108, a reflux tank 109 and an ammonia water condenser 110.
The ammonia still 101 has a water inlet pipe, a water outlet pipe, a steam supply unit 102, and an alkali liquor supply unit 103. Ammonia nitrogen wastewater to be treated, such as landfill leachate, enters the ammonia still 101 through the water inlet pipe to be subjected to deamination treatment, and water produced by the deamination treatment flows out through the water outlet pipe. In this embodiment, the water inlet of the ammonia still 101, which is communicated with the water inlet pipe, is arranged at the top of the ammonia still 101, and the water outlet of the ammonia still 101, which is communicated with the water outlet pipe, is arranged at the bottom of the ammonia still 101. The steam supply unit 102 is used for supplying steam to the ammonia still 101, and the waste water entering the ammonia still is heated by the steam, so that the ammonia nitrogen in the waste water is converted into a gaseous state, the deamination is realized, and the treated waste water and the condensate water after steam heat exchange condensation are led out through a water outlet pipe. In this embodiment, the steam supply unit 102 is disposed at the bottom region of the sidewall of the ammonia still 101, so that the steam will flow from bottom to top after entering the ammonia still 101, and sufficient contact heat exchange with the wastewater can be realized.
The alkali liquor supply unit 103 is communicated with the ammonia still 101 and is used for adding alkali liquor into the ammonia still 101. In the embodiment, the alkali liquor supply unit 103 is disposed in the top region of the sidewall of the ammonia still 101, and the alkali liquor supplied by the alkali liquor supply unit 103, which contains hydroxide ions, is mixed with the wastewater entering the ammonia still 101, so as to neutralize the acidic substances in the wastewater and combine with the ammonia nitrogen in the wastewater, so as to convert the ammonia nitrogen in the wastewater into ammonia-containing gas through distillation.
The preheater 104 is used for preheating the wastewater entering the ammonia still 101 to increase the temperature thereof, so as to facilitate the deamination treatment. In this embodiment, the preheater 104 preheats the wastewater by using the waste heat of the produced water of the ammonia still 101. That is, the wastewater of the inlet pipe of the ammonia still 101 and the produced water of the outlet pipe exchange heat with each other at the preheater 104, thereby raising the temperature of the wastewater in the inlet pipe and lowering the temperature of the produced water in the outlet pipe.
The seed crystal adder 105 is used for adding seed crystals to the water inlet pipe, and the seed crystals and the wastewater in the water inlet pipe are mixed and then enter the preheater 104 for preheating. That is, before waste water gets into preheater 104 and preheats, add the seed crystal through seed crystal adder 105 in to the inlet tube, the seed crystal of sufficient quantity provides very big crystal surface, makes calcium carbonate, calcium sulfate's in the waste water supersaturation in time eliminate to avoid calcium carbonate, calcium sulfate etc. nucleation and growth on metal interface, both avoided the scale deposit problem of preheater 104 and inlet channel, also effectively reduced the inside scale deposit of ammonia still 101 and blockked up the risk. In this embodiment, the seed crystal is one or more of calcium salt and magnesium salt which are difficult to dissolve in water. And, illustratively, the mass fraction ratio of the seed crystal to the wastewater is 0.1% to 10%.
The solid-liquid separator 106 is arranged between the preheater 104 and the ammonia still 101, and the wastewater in the water inlet pipe enters the solid-liquid separator 106 after being preheated by the preheater 104, and solid impurities in the wastewater are removed through solid-liquid separation treatment. That is, the effluent from the preheater 104 is fed to a solid-liquid separator 106 to be subjected to solid-liquid separation to remove solid impurities such as calcium carbonate and magnesium carbonate precipitated in the effluent, and the liquid after the solid removal treatment is fed from the top of the column to an ammonia still 101 to be subjected to ammonia-nitrogen removal treatment. Illustratively, the solid-liquid separator 106 includes a solid-liquid separation device such as a filter, a centrifugal settler, or a gravity settler.
The outlet water cooler 107 is communicated with the preheater 104 and is used for cooling the produced water after heat exchange by the preheater 104, in other words, the produced water of the ammonia still 101 enters the outlet water cooler 107 for further temperature reduction after heat exchange by the preheater 104 and temperature reduction, and can exchange heat with cooling water or other low-temperature media in the outlet water cooler to further reduce the temperature, and the produced water is discharged after heat exchange in the outlet water cooler 107.
The tower top condenser 108 is used for condensing ammonia-containing gas generated by the ammonia still deamination treatment. After wastewater enters an ammonia still 101 for ammonia nitrogen removal treatment, ammonia nitrogen ions in the wastewater are converted into ammonia nitrogen gas, then the ammonia nitrogen gas is discharged from an outlet at the top of the tower and enters a condenser 108 at the top of the tower, liquid and gas are separated after the ammonia nitrogen ions are condensed in the condenser 108 at the top of the tower through heat exchange (for example, with cooling water), the liquid enters a reflux tank 109, and the gas enters an ammonia water condenser 110 through a reflux tank 9.
The reflux tank 109 is used for collecting the liquid generated after the treatment of the overhead condenser 108 and reintroducing the liquid into the ammonia still 101, and the overhead condenser 108 and the reflux tank 109 can realize the reflux of the overhead condensate so as to remove ammonia nitrogen ions in the wastewater as much as possible.
The ammonia water condenser 110 is communicated with the reflux tank 109 and the tower top condenser 108, and is used for condensing the ammonia-containing gas condensed by the tower top condenser 108, so that the ammonia-containing gas is converted into ammonia water.
The working principle of the ammonia nitrogen wastewater treatment device 100 according to the embodiment is as follows:
the seed crystal adder 105 adds seed crystals into the water inlet pipe, the ammonia nitrogen wastewater is mixed with the seed crystals and then enters the tower bottom preheater 104 for preheating, meanwhile, based on the principle that the affinity of the same substance is greater than that of a dissimilar substance, molecules such as calcium carbonate and calcium sulfate precipitated by the temperature rise of the wastewater in the preheater 104 are preferentially attached to suspended crystals, the effluent of the preheater 104 enters the solid-liquid separator 106 for solid-liquid separation to remove solid impurities such as calcium carbonate and magnesium carbonate precipitated in the effluent, the liquid subjected to the solid removal treatment enters the ammonia still 101 from the tower top for ammonia nitrogen removal treatment, steam for providing heat for the ammonia nitrogen removal treatment is provided from the bottom of the ammonia still 101 by the steam supply unit 102, the steam is converted into produced water after heat exchange with the ammonia nitrogen wastewater, is discharged from a water outlet at the bottom, enters the preheater 104 through a water outlet pipe for preheating the wastewater, and is condensed by the, resulting in a final effluent discharge. Ammonia nitrogen ions in the wastewater are heated and then converted into ammonia nitrogen gas, the ammonia nitrogen gas is discharged from an air outlet at the top of the tower and enters a condenser 108 at the top of the tower, liquid and gas are separated after heat exchange (for example, with cooling water) condensation in the condenser 108 at the top of the tower, the liquid enters a reflux tank 109, the gas enters an ammonia water condenser 110 through a reflux tank 9, and the ammonia nitrogen gas is converted into ammonia water and discharged after condensation in the ammonia water condenser 110.
According to the utility model discloses an ammonia nitrogen effluent treatment plant adds the seed crystal on the pre-heater inlet line, makes waste water because of heating up in the pre-heater and molecule such as calcium carbonate, calcium sulfate that appear is attached to the crystal of suspension to add between pre-heater and ammonia still and set up solid-liquid separation equipment, get rid of the solid that appears in the waste water, can effectively avoid the scale deposit problem of pre-heater and inlet line like this, can reduce the inside scale deposit of ammonia still and block up the risk again.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an ammonia nitrogen effluent treatment plant which characterized in that includes:
the ammonia still comprises an ammonia still, a water inlet pipe, a water outlet pipe and a steam supply unit, wastewater to be treated is led into the ammonia still through the water inlet pipe for deamination treatment, water produced after deamination treatment is led out through the water outlet pipe, and the steam supply unit is used for providing steam for deamination treatment for the ammonia still;
the preheater is used for exchanging heat between the wastewater in the water inlet pipe and the produced water in the water outlet pipe so as to raise the temperature of the wastewater in the water inlet pipe and lower the temperature of the produced water in the water outlet pipe;
the seed crystal adder is used for adding seed crystals to the water inlet pipe, and the seed crystals and the wastewater in the water inlet pipe are mixed and then enter the preheater for preheating;
and the solid-liquid separator is arranged between the preheater and the ammonia still, the wastewater in the water inlet pipe enters the solid-liquid separator after being preheated by the preheater, and solid impurities in the wastewater are removed through solid-liquid separation treatment.
2. The ammonia nitrogen wastewater treatment device according to claim 1, wherein the mass fraction ratio of the seed crystal to the wastewater is 0.1-10%.
3. The ammonia-nitrogen wastewater treatment device of claim 1, wherein the solid-liquid separator comprises a filter, a centrifugal settler or a gravity settler.
4. The ammonia-nitrogen wastewater treatment device according to any one of claims 1 to 3, further comprising:
and the alkali liquor supply unit is communicated with the ammonia still and is used for adding alkali liquor into the ammonia still.
5. The ammonia nitrogen wastewater treatment device according to any one of claims 1-3, comprising:
the tower top condenser is used for condensing ammonia-containing gas generated by the ammonia still deamination treatment;
and the reflux tank is used for collecting the liquid generated after the treatment of the tower top condenser and reintroducing the liquid into the ammonia still.
6. The ammonia-nitrogen wastewater treatment device according to claim 5, characterized by further comprising:
the ammonia water condenser, the ammonia water condenser with reflux drum and top of the tower condenser intercommunication for the condensation process the gaseous containing ammonia behind the top of the tower condenser condensation, make gaseous containing ammonia changes into the ammonia water.
7. The ammonia nitrogen wastewater treatment device according to any one of claims 1-3, comprising:
and the water outlet cooler is communicated with the preheater and is used for cooling the produced water subjected to heat exchange by the preheater.
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| CN202021206133.1U CN213416567U (en) | 2020-06-24 | 2020-06-24 | Ammonia nitrogen wastewater treatment device |
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| CN202021206133.1U CN213416567U (en) | 2020-06-24 | 2020-06-24 | Ammonia nitrogen wastewater treatment device |
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