CN215626893U - Desulfurization waste water drying and concentrating integrated device - Google Patents
Desulfurization waste water drying and concentrating integrated device Download PDFInfo
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- CN215626893U CN215626893U CN202122238383.4U CN202122238383U CN215626893U CN 215626893 U CN215626893 U CN 215626893U CN 202122238383 U CN202122238383 U CN 202122238383U CN 215626893 U CN215626893 U CN 215626893U
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Abstract
The utility model discloses a desulfurization wastewater drying and concentrating integrated device which comprises a drying and concentrating integrated tower, a flue gas distributor, a desulfurization wastewater concentrated solution atomizing nozzle, an air preheater inlet flue, an electric precipitator inlet flue, a desulfurization wastewater pipeline, a desulfurization wastewater concentrated solution atomizing pump and a desulfurization wastewater concentrated solution pipeline, wherein the flue gas distributor is arranged at the upper part of the drying and concentrating integrated tower; a central cylinder is arranged in the drying and concentrating integrated tower, a wastewater concentrating and cooling chamber is arranged on the upper side of the central cylinder in the drying and concentrating integrated tower, a circular ring-shaped ascending chamber is formed between the outer wall of the central cylinder and the side wall of the drying and concentrating integrated tower, the flue gas distributor and the desulfurization wastewater concentrated liquid atomizing nozzle are located in the central cylinder, the bottom of the central cylinder is communicated with the bottom of the circular ring-shaped ascending chamber, and the device can fully utilize the heat of flue gas and reduce the energy consumption of a desulfurization wastewater zero discharge system.
Description
Technical Field
The utility model belongs to the technical field of pollutant control, and relates to a drying and concentrating integrated device for desulfurization wastewater.
Background
The limestone-gypsum wet flue gas desulfurization technology has become the mainstream treatment process of the flue gas desulfurization of the current power plant in China due to the advantages of high desulfurization efficiency, mature technology, reliable operation, strong adaptability to coal types and the like. According to statistics, over 90% of coal-fired power plants in China adopt a limestone-gypsum wet desulphurization process. In order to ensure the stable operation of the desulfurization system, a certain amount of wastewater must be discharged from the desulfurization system, and the discharged desulfurization wastewater often contains many impurities, such as sulfate, heavy metals, suspended matters, and heavy metals, such as Pb, Cd, Cr, Ni, Hg, and the like, which are listed as first pollutants in the integrated wastewater discharge standard, and is terminal wastewater of a coal-fired power plant, and the water quality is the worst. The discharged wastewater must meet the emission standards. Heavy metal ions contained in the desulfurization wastewater have considerable toxicity, are difficult to self-purify or biodegrade when discharged into the natural environment, can be enriched in natural water, and can cause harm to organisms in the water after reaching a certain amount.
Partial areas require zero discharge of wastewater, and the technical policy for pollution control of thermal power plants and the feasible technical guideline for pollution control of thermal power plants (HJ 2301 and 2017) issued by the ministry of environmental protection also propose: the desulfurization wastewater is treated by traditional processes such as neutralization, chemical precipitation, flocculation, clarification and the like, and treatment processes such as evaporation drying by waste heat, crystallization and the like are encouraged to carry out zero discharge of the wastewater. The common way of waste water concentration and reduction and evaporation drying is used in the desulfurization waste water zero discharge process in the coal-fired power plant at present. The temperature of the hot flue gas discharged into the inlet of the electric dust collector after the hot flue gas at the inlet of the air preheater is dried and crystallized in the concentrated solution is still high, and the heat of the flue gas is not fully utilized, so that the operation energy consumption of the desulfurization wastewater zero-discharge system is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a desulfurization wastewater drying and concentrating integrated device which can fully utilize the heat of flue gas and reduce the energy consumption of a desulfurization wastewater zero-discharge system.
In order to achieve the aim, the desulfurization wastewater drying and concentrating integrated device comprises a drying and concentrating integrated tower, a flue gas distributor, a desulfurization wastewater concentrated solution atomizing nozzle, an air preheater inlet flue, an electric dust remover inlet flue, a desulfurization wastewater pipeline, a desulfurization wastewater concentrated solution atomizing pump and a desulfurization wastewater concentrated solution pipeline;
a central cylinder is arranged in the drying and concentrating integrated tower, wherein a wastewater concentrating and cooling chamber is arranged on the upper side of the central cylinder in the drying and concentrating integrated tower, an annular ascending chamber is formed between the outer wall of the central cylinder and the side wall of the drying and concentrating integrated tower, the flue gas distributor and the desulfurization wastewater concentrated liquid atomizing nozzle are both positioned in the central cylinder, and the bottom of the central cylinder is communicated with the bottom of the annular ascending chamber;
an inlet flue of the air preheater is communicated with an inlet of the flue gas distributor, a waste water concentrated solution collecting tank is arranged at the joint of the circular ring-shaped ascending chamber and the waste water concentrating and cooling chamber, and the waste water concentrated solution collecting tank is fixed on the inner wall of the drying and concentrating integrated tower;
a desulfurization wastewater concentration spraying layer and an atomizing nozzle are arranged in the wastewater concentration and temperature reduction chamber, the top outlet of the drying and concentration integrated tower is connected with the inlet flue of the electric dust collector, and a desulfurization wastewater pipeline is connected with the desulfurization wastewater concentration spraying layer and the atomizing nozzle;
the waste water concentrated solution collecting tank is connected with an inlet of a desulfurization waste water concentrated solution atomizing pump, a desulfurization waste water concentrated solution pipeline is connected with an inlet of the desulfurization waste water concentrated solution atomizing pump, and an outlet of the desulfurization waste water concentrated solution atomizing pump is connected with a desulfurization waste water concentrated solution atomizing nozzle.
And a hot flue gas regulating valve is arranged on an inlet flue of the air preheater.
Be provided with the toper guide plate in the concentrated cooling of waste water room, wherein, the toper guide plate is located the concentrated layer and the atomizing nozzle's of spraying of desulfurization waste water below, and the lower extreme of toper guide plate is located the waste water concentrate collecting vat directly over.
The waste water concentrated solution collecting tank is of an annular structure, an oblique Z-shaped channel is formed by one side of the waste water concentrated solution collecting tank and one side of the conical guide plate, and the annular ascending chamber and the waste water concentrated cooling chamber are communicated through the oblique Z-shaped channel.
And a flue gas discharge baffle is arranged on the inlet flue of the electric dust collector.
The desulfurization waste water pipeline is continuous with the entry of the concentrated atomizing pump of desulfurization waste water through desulfurization waste water governing valve, and the export of the concentrated atomizing pump of desulfurization waste water sprays layer and atomizing nozzle with the concentration of desulfurization waste water and links to each other.
The desulfurization waste water concentrated solution pipeline is connected with the inlet of the desulfurization waste water concentrated solution atomizing pump through a desulfurization waste water concentrated solution valve.
The bottom of the drying and concentrating integrated body is provided with an ash discharge port communicated with an external ash storehouse.
An ash discharge port at the bottom of the drying and concentrating integrated tower is communicated with an external ash storehouse through a dry ash delivery valve.
The utility model has the following beneficial effects:
when the integrated device for drying and concentrating the desulfurization wastewater is specifically operated, the heat of the flue gas is utilized in two sections, wherein the first section is as follows: in a central cylinder, high-temperature flue gas is utilized to carry out drying crystallization on desulfurization wastewater concentrated solution so as to realize the primary utilization of flue gas heat, the flue gas after heat exchange enters a wastewater concentration cooling chamber through a circular ring-shaped ascending chamber, and exchanges heat with desulfurization wastewater sprayed by a desulfurization wastewater concentration spraying layer and an atomizing nozzle so as to realize the secondary utilization of flue gas heat, and then the cascade utilization of the flue gas is realized, so that the heat of the flue gas is fully utilized, and the energy consumption of a desulfurization wastewater zero discharge system is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a dry ash conveying valve, 2 is a drying and concentrating integrated tower, 3 is a circular ring-shaped ascending chamber, 4 is a desulfurization wastewater concentrated solution atomizing nozzle, 5 is a hot flue gas regulating valve, 6 is a flue gas distributor, 7 is a desulfurization wastewater concentrated solution atomizing pump, 8 is a desulfurization wastewater concentrated solution valve, 9 is a wastewater concentrated solution collecting tank, 10 is a wastewater concentration cooling chamber, 11 is a desulfurization wastewater concentration spraying layer and atomizing nozzle, 12 is a desulfurization wastewater concentration atomizing pump, 13 is a desulfurization wastewater regulating valve, and 14 is a flue gas discharge baffle.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the utility model. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the desulfurization wastewater drying and concentrating integrated device of the present invention includes a dry ash conveying valve 1, a drying and concentrating integrated tower 2, an annular ascending chamber 3, a desulfurization wastewater concentrated solution atomizing nozzle 4, a hot flue gas regulating valve 5, a flue gas distributor 6, a desulfurization wastewater concentrated solution atomizing pump 7, a desulfurization wastewater concentrated solution valve 8, a wastewater concentrated solution collecting tank 9, a wastewater concentration cooling chamber 10, a desulfurization wastewater concentration spraying layer and atomizing nozzle 11, a desulfurization wastewater concentration atomizing pump 12, a desulfurization wastewater regulating valve 13, and a flue gas discharge baffle 14;
a central cylinder is arranged in the drying and concentrating integrated tower 2, wherein a wastewater concentrating and cooling chamber 10 is arranged on the upper side of the central cylinder in the drying and concentrating integrated tower 2, an annular ascending chamber 3 is formed between the outer wall of the central cylinder and the side wall of the drying and concentrating integrated tower 2, a flue gas distributor 6 and a desulfurization wastewater concentrated solution atomizing nozzle 4 are both positioned in the central cylinder, and the bottom of the central cylinder is communicated with the bottom of the annular ascending chamber 3;
an inlet flue of the air preheater is communicated with an inlet of the flue gas distributor 6, a hot flue gas regulating valve 5 is arranged on the inlet flue of the air preheater, a waste water concentrated liquid collecting tank 9 and a conical guide plate are arranged at the joint position of the circular ring-shaped ascending chamber 3 and the waste water concentrated cooling chamber 10, wherein the lower end of the conical guide plate is positioned above the waste water concentrated liquid collecting tank 9, the waste water concentrated liquid collecting tank 9 is fixed on the inner wall of the drying and concentrating integrated tower 2, the waste water concentrated liquid collecting tank 9 is of an annular structure, an oblique Z-shaped channel is formed between one side of the waste water concentrated liquid collecting tank 9 and one side of the conical guide plate, and the circular ring-shaped ascending chamber 3 and the waste water concentrated cooling chamber 10 are communicated through the oblique Z-shaped channel.
The concentrated layer and the atomizing nozzle 11 of spraying of desulfurization waste water have set gradually in the concentrated cooling chamber 10 of waste water from bottom to top, and the top export of the concentrated integrative tower of drying 2 links to each other with electrostatic precipitator entry flue, is provided with emission flue gas baffle 14 on the electrostatic precipitator entry flue.
The desulfurization waste water pipeline is connected with the inlet of the desulfurization waste water concentration atomizing pump 12 through the desulfurization waste water regulating valve 13, and the outlet of the desulfurization waste water concentration atomizing pump 12 is connected with the desulfurization waste water concentration spraying layer and the atomizing nozzle 11.
The waste water concentrated solution collecting tank 9 is connected with an inlet of a desulfurization waste water concentrated solution atomizing pump 7, a desulfurization waste water concentrated solution pipeline is connected with an inlet of the desulfurization waste water concentrated solution atomizing pump 7 through a desulfurization waste water concentrated solution valve 8, an outlet of the desulfurization waste water concentrated solution atomizing pump 7 is connected with a desulfurization waste water concentrated solution atomizing nozzle 4, the desulfurization waste water concentrated solution atomizing nozzle 4 is positioned in a central cylinder, and an ash discharging port at the bottom of the drying and concentrating integrated tower 2 is communicated with an external ash storehouse through a dry ash conveying valve 1.
The specific implementation process of the utility model is as follows:
hot flue gas at the inlet of the air preheater enters a flue gas distributor 6 through a hot flue gas regulating valve 5 and then enters a central cylinder through the flue gas distributor 6, then flows downwards together with the desulfurization waste water concentrated solution atomized by the desulfurization waste water concentrated solution atomizing nozzle 4 in the central cylinder, the hot flue gas is used for drying the moisture in the thick desulfurization waste water fog drops, so that the temperature of the hot flue gas is reduced, the flue gas carries the water vapor evaporated in the thick desulfurization waste water to flow upwards through the annular ascending chamber 3, then enters a wastewater concentration and temperature reduction chamber 10, and is in countercurrent contact with the desulfurization wastewater droplets atomized by a desulfurization wastewater concentration spray layer and an atomizing nozzle 11 in the wastewater concentration and temperature reduction chamber 10, to evaporate the water in the desulfurization waste water to further reduce the temperature of the flue gas, the flue gas cooled by the desulfurization waste water flows upwards, then the flue gas is discharged to an inlet flue of an electric dust collector through a flue gas outlet at the top of the drying and concentrating integrated tower 2.
When the device works, the flow of concentrated desulfurization wastewater is determined according to the flow of extracted hot dry flue gas, the temperature of flue gas after drying of wastewater concentrate and the concentration proportion of desulfurization wastewater, then the flow of desulfurization wastewater entering a desulfurization wastewater concentration atomizing pump 12 is adjusted through a desulfurization wastewater adjusting valve 13, desulfurization wastewater to be concentrated is sent into a desulfurization wastewater concentration spraying layer and an atomizing nozzle 11 through the desulfurization wastewater concentration atomizing pump 12 to be atomized into fog drops, the fog drops of desulfurization wastewater are evaporated by the flue gas to realize the concentration of the desulfurization wastewater, the concentrated desulfurization wastewater falls into a wastewater concentrate collecting tank 9 under the action of a conical guide plate, then is converged with newly-entered desulfurization wastewater to enter a desulfurization wastewater concentrate atomizing pump 7, and finally the desulfurization wastewater concentrate is sent into a desulfurization wastewater concentrate atomizing nozzle 4 through the desulfurization wastewater atomizing pump 7 to be atomized, in the central cylinder, moisture in the thick desulfurization wastewater fog drops is evaporated by hot flue gas, wherein salt and impurities in the thick desulfurization wastewater and ash carried by the flue gas fall downwards to the bottom of the drying and concentrating integrated tower 2, and finally the salt and impurities and the ash are conveyed into an ash warehouse through a dry ash conveying valve 1.
According to the characteristic that the temperature of the flue gas discharged by the desulfurization wastewater concentrated solution drying crystallization tower is higher, the flue gas with higher temperature after the desulfurization wastewater concentrated solution is dried and crystallized is concentrated by the desulfurization wastewater in the wastewater concentration cooling chamber 10 at the top of the drying tower, so that the heat of hot flue gas extracted by the desulfurization wastewater concentrated solution drying crystallization is fully utilized, and the operation energy consumption of a desulfurization wastewater zero-discharge system is reduced.
Claims (9)
1. The integrated drying and concentrating device for the desulfurization wastewater is characterized by comprising a drying and concentrating integrated tower (2), a flue gas distributor (6), a desulfurization wastewater concentrated solution atomizing nozzle (4), an air preheater inlet flue, an electric dust remover inlet flue, a desulfurization wastewater pipeline, a desulfurization wastewater concentrated solution atomizing pump (7) and a desulfurization wastewater concentrated solution pipeline;
a central cylinder is arranged in the drying and concentrating integrated tower (2), wherein a wastewater concentrating and cooling chamber (10) is arranged on the upper side of the central cylinder in the drying and concentrating integrated tower (2), an annular ascending chamber (3) is formed between the outer wall of the central cylinder and the side wall of the drying and concentrating integrated tower (2), a flue gas distributor (6) and a desulfurization wastewater concentrated solution atomizing nozzle (4) are both positioned in the central cylinder, and the bottom of the central cylinder is communicated with the bottom of the annular ascending chamber (3);
an inlet flue of the air preheater is communicated with an inlet of the flue gas distributor (6), a wastewater concentrated solution collecting tank (9) is arranged at the joint of the circular ring-shaped ascending chamber (3) and the wastewater concentration and cooling chamber (10), and the wastewater concentrated solution collecting tank (9) is fixed on the inner wall of the drying and concentrating integrated tower (2);
a desulfurization wastewater concentration spraying layer and an atomizing nozzle (11) are arranged in the wastewater concentration cooling chamber (10), the top outlet of the drying and concentration integrated tower (2) is connected with the inlet flue of the electric dust collector, and a desulfurization wastewater pipeline is connected with the desulfurization wastewater concentration spraying layer and the atomizing nozzle (11);
the waste water concentrated solution collecting tank (9) is connected with an inlet of a desulfurization waste water concentrated solution atomizing pump (7), a desulfurization waste water concentrated solution pipeline is connected with an inlet of the desulfurization waste water concentrated solution atomizing pump (7), and an outlet of the desulfurization waste water concentrated solution atomizing pump (7) is connected with a desulfurization waste water concentrated solution atomizing nozzle (4).
2. The integrated drying and concentrating device for desulfurization waste water according to claim 1, wherein the inlet flue of the air preheater is provided with a hot flue gas regulating valve (5).
3. The integrated drying and concentrating device for desulfurization wastewater as claimed in claim 1, wherein a conical flow guide plate is disposed in the wastewater concentrating and cooling chamber (10), wherein the conical flow guide plate is disposed below the desulfurization wastewater concentrating spray layer and the atomizing nozzles (11), and the lower end of the conical flow guide plate is disposed right above the wastewater concentrate collecting tank (9).
4. The integrated drying and concentrating device for desulfurization wastewater as claimed in claim 3, wherein the wastewater concentrate collecting tank (9) is of an annular structure, one side of the wastewater concentrate collecting tank (9) and one side of the conical flow deflector form an inclined Z-shaped channel, and the annular ascending chamber (3) is communicated with the wastewater concentration and cooling chamber (10) through the inclined Z-shaped channel.
5. The integrated drying and concentrating device for desulfurization wastewater as claimed in claim 1, wherein a flue gas discharge baffle (14) is arranged on the inlet flue of the electric dust collector.
6. The integrated desulfurization waste water drying and concentrating device according to claim 1, wherein the desulfurization waste water pipeline is connected with the inlet of the desulfurization waste water concentrating and atomizing pump (12) through the desulfurization waste water regulating valve (13), and the outlet of the desulfurization waste water concentrating and atomizing pump (12) is connected with the desulfurization waste water concentrating and spraying layer and the atomizing nozzle (11).
7. The integrated desulfurization wastewater drying and concentrating device according to claim 1, wherein the desulfurization wastewater concentrate pipeline is connected to an inlet of the desulfurization wastewater concentrate atomizing pump (7) through the desulfurization wastewater concentrate valve (8).
8. The integrated drying and concentrating device for desulfurization waste water according to claim 1, wherein the bottom of the integrated drying and concentrating tower (2) is provided with an ash discharge port communicated with an external ash storehouse.
9. The integrated drying and concentrating device for desulfurization waste water according to claim 8, wherein an ash discharge port at the bottom of the integrated drying and concentrating tower (2) is communicated with an external ash storehouse through a dry ash delivery valve (1).
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| CN202122238383.4U CN215626893U (en) | 2021-09-15 | 2021-09-15 | Desulfurization waste water drying and concentrating integrated device |
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| CN202122238383.4U CN215626893U (en) | 2021-09-15 | 2021-09-15 | Desulfurization waste water drying and concentrating integrated device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716643A (en) * | 2021-09-15 | 2021-11-30 | 西安西热锅炉环保工程有限公司 | Desulfurization waste water drying and concentrating integrated device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716643A (en) * | 2021-09-15 | 2021-11-30 | 西安西热锅炉环保工程有限公司 | Desulfurization waste water drying and concentrating integrated device |
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