Wastewater evaporation system

Abstract

The utility model relates to the field of wastewater treatment, in particular to a wastewater evaporation system. Comprising an evaporation tower, a gas inlet and a gas outlet are formed in the evaporation tower, the evaporation tower is vertically arranged, the gas inlet is located in the top of the evaporation tower, and the gas outlet is located in the lower portion of the evaporation tower; the top of the evaporation tower is communicated with an atomization spray gun, and the orientation of the atomization spray gun and the orientation of the gas inlet are arranged along the height direction of the evaporation tower. The wastewater evaporation system disclosed by the utility model can solve the problem that the inner wall of the evaporation tower is easy to cake.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment field, concretely relates to a wastewater evaporation system. BACKGROUND

[0002] Part of the desulfurization wastewater produced by the thermal power station, shale gas flowback fluid and other wastewater contains fine dust, slurry and other insoluble precipitates in water, when treating, the efficiency of direct filtration is low, and the precipitates in the wastewater cannot be completely removed, so at present, the wastewater is concentrated first, and then the concentrated wastewater containing a large amount of precipitates is dried.

[0003] At present, there is a high-efficiency energy-saving wastewater evaporation crystallizer disclosed in application No. 201610201606.0, which is connected with the evaporation pipe inlet by setting the evaporation pipe inlet, the inlet flange, the inlet chamber, the inlet pneumatic baffle, the evaporation pipe body, the outlet pneumatic baffle, the outlet chamber, the outlet flange and the evaporation pipe outlet in sequence, the gas pipeline is connected between the denitration device and the air preheater, the evaporation pipe outlet is communicated with the inlet flue of the dust collector, the wastewater nozzle is arranged in the evaporation pipe body, and the wastewater nozzle is communicated with the wastewater pipeline after pretreatment. When the concentrated wastewater is dried, the wastewater is sprayed from the wastewater nozzle, the high-temperature flue gas enters the evaporation crystallizer from the evaporation pipe inlet, contacts the sprayed wastewater, dries the wastewater, and obtains the dry dust formed by the precipitates, and part of the dry dust is discharged with the high-temperature flue gas, and part of the dry dust stays in the position of the crystallizer far from the evaporation pipe inlet.

[0004] However, the above-mentioned evaporation crystallizer has the following defects when in use: since the wastewater nozzle is transversely arranged, the distance between the wastewater sprayed through the wastewater nozzle and the side wall of the evaporation crystallizer is relatively small, and part of the wastewater containing a large amount of precipitates inevitably falls on the inner wall of the evaporation crystallizer opposite to the wastewater nozzle, the wastewater is dried under the action of the high-temperature flue gas, and the precipitates in the wastewater adhere to the inner wall of the evaporation crystallizer, and the precipitates are difficult to clean after being used for a certain period of time, and the precipitates continuously increase for a long time, so that the diameter of the evaporation crystallizer is reduced, and the circulation of the high-temperature flue gas is hindered. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide a wastewater evaporation system, so as to solve the problem that the inner wall of the evaporation tower is easy to be caked.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wastewater evaporation system, comprising an evaporation tower, a gas inlet and a gas outlet are arranged on the evaporation tower, the evaporation tower is vertically arranged, the gas inlet is located at the top of the evaporation tower, and the gas outlet is located at the lower part of the evaporation tower, an atomizing lance is communicated with the top of the evaporation tower, and the direction of the atomizing lance and the direction of the gas inlet are both arranged along the height direction of the evaporation tower.

[0007] The beneficial effects of the present scheme are:

[0008] In the present scheme, the concentrated wastewater with precipitates is sprayed into the evaporation tower from the atomizing lance and flows downward along the evaporation tower, while the high-temperature gas entering from the gas inlet also flows downward along the evaporation tower, so the flow directions of the high-temperature gas and the atomized wastewater are the same in the present scheme, and the high-flow-rate high-temperature gas will wrap the atomized wastewater and flow downward, so the atomized wastewater is not easy to contact the inner wall of the evaporation tower, and the precipitates in the wastewater will not adhere to the inner wall of the evaporation tower to form clumps.

[0009] Secondly, since the evaporation tower in the present scheme is vertically arranged, the dry dust obtained after the wastewater is dried will also continue to move downward under the action of gravity and flowing gas, and finally accumulate at the bottom of the evaporation tower or be discharged with the gas from the gas outlet, and will not precipitate in the middle of the evaporation tower, so the evaporation system in the present scheme does not need to be frequently cleaned up the inner wall of the middle and lower parts of the evaporation tower during use.

[0010] Further, the middle part of the evaporation tower is provided with a mounting assembly, which is annular and has an L-shaped vertical cross section.

[0011] The beneficial effects of the present scheme are that the mounting assembly in the present scheme can mount the evaporation tower on the support or adjacent equipment or building outside, improving the fixing effect of the evaporation tower.

[0012] Further, the mounting assembly comprises an upper ring plate, a lower ring plate, and a plurality of rib plates, the upper ring plate and the lower ring plate are both sleeved on the outer wall of the evaporation tower, the plurality of rib plates are all located between the upper ring plate and the lower ring plate and are distributed along the circumference of the evaporation tower, the rib plates are fixed at both ends with the upper ring plate and the lower ring plate respectively and abut against the side wall of the evaporation tower.

[0013] The beneficial effects of the present scheme are that the upper ring plate in the present scheme provides a mounting position for the connection with the support or the like outside, and the rib plates can support the space between the upper ring plate and the lower ring plate and the side wall of the evaporation tower, improving the fixing strength.

[0014] Further, the outer circumferential diameter of the lower ring plate is greater than that of the upper ring plate, and a plurality of fixing holes are arranged on the lower ring plate in the circumferential direction, and the rib plates are present on both sides of each fixing hole.

[0015] The beneficial effects of the present scheme are that the space of the lower ring plate in the present scheme is larger, and the installation is more convenient.

[0016] Further, the lower side of the lower ring plate and the upper side of the upper ring plate are both provided with a reinforcing plate, which is sleeved on the outside of the evaporation tower and fixed with the lower ring plate or the upper ring plate.

[0017] The beneficial effects of the present scheme are that the reinforcing plate is fixed with the evaporation tower, which can increase the strength of the evaporation tower at the positions around the upper ring plate and the lower ring plate, and further avoid the deformation of the evaporation tower.

[0018] Further, the gas inlet is connected with a heat exchanger, the heat exchanger is provided with a heat source inlet, a heat source outlet, a secondary air inlet and a secondary air outlet, and the secondary air outlet is communicated with the gas inlet.

[0019] The beneficial effects of the present scheme are: when the heat source is a high-temperature flue gas or other gas with certain pollution sources, if the high-temperature flue gas is directly introduced into the evaporation tower to dry the concentrated wastewater, the water vapor formed by the drying of the wastewater and the dry dust discharged with the high-temperature flue gas will mix into the high-temperature flue gas, which will adversely affect the subsequent treatment of the high-temperature flue gas; if the high-temperature flue gas is treated first and then introduced into the evaporation tower, the heat in the high-temperature flue gas will also escape during the treatment of the high-temperature flue gas, resulting in low heat utilization rate and reduced drying effect.

[0020] In the present scheme, the heat exchanger uses the heat of the high-temperature flue gas to heat the gas, and then introduces the heated hot air into the evaporation tower to dry the wastewater. Since there is no pollution source in the hot air, after dust removal and collection of dry dust from the mixed gas mixed with water vapor and dry dust, the water vapor and the gas can be directly discharged. The high-temperature flue gas passing through the heat exchanger will not mix with other gases or dust, which is convenient for subsequent unified and centralized treatment.

[0021] Further, the atomizing spray gun is provided with a plurality of gas inlets, and the gas inlets are coaxial with the evaporation tower, and the plurality of atomizing spray guns are uniformly distributed along the circumference of the gas inlet.

[0022] The beneficial effects of the present scheme are: the atomizing spray gun in the present scheme can uniformly spray the concentrated wastewater into the evaporation tower, so that the wastewater can be more fully contacted with the high-temperature gas, thereby improving the drying effect.

[0023] Further, the top of the evaporation tower is provided with a mounting bracket, and the atomizing spray gun is connected with the mounting bracket.

[0024] The beneficial effects of the present scheme are: the atomizing spray gun in the present scheme can be better installed on the evaporation tower through the mounting bracket.

[0025] Further, the upper part of the evaporation tower is provided with a limiting assembly, the limiting assembly includes a windproof ring and a plurality of connecting pieces, the windproof ring is sleeved on the evaporation tower and fixedly connected with the evaporation tower, and the plurality of connecting pieces are distributed along the circumference of the evaporation tower and fixedly connected with the windproof ring.

[0026] The beneficial effects of the present scheme are: in order to ensure that the concentrated wastewater can be completely dried after moving downward to the lower part of the evaporation tower, the height of the evaporation tower needs to be more than 10 meters, and the volume of the evaporation tower is large, which is easy to sway or rotate under the action of the wind. The limiting assembly in the present scheme is connected with the surrounding supports, buildings and the like to limit the evaporation tower, preventing the evaporation tower from rotating.

[0027] Furthermore, the lower part of the evaporation tower is equipped with a sealable manhole.

[0028] The beneficial effects of this solution are: when a malfunction occurs inside the evaporator or when too much dry dust accumulates at the bottom of the evaporator, the manhole can be opened to inspect and maintain the evaporator and remove the accumulated dry dust. Attached Figure Description

[0029] Figure 1 This is a perspective view of the evaporation tower in an embodiment of this utility model;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 This is a schematic diagram of the heat exchanger in an embodiment of this utility model. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The reference numerals in the accompanying drawings include: evaporator 1, inlet pipe 11, gas outlet 12, ash outlet 13, manhole 14, mounting bracket 2, atomizing spray gun 3, lower ring plate 4, fixing hole 41, upper ring plate 5, stiffening plate 6, reinforcing plate 7, windproof ring 8, connector 81, heat exchanger 9, heat source inlet 91, heat source outlet 92, secondary air inlet 93, and secondary air outlet 94.

[0034] Example

[0035] The implementation examples are basically as follows Figure 1 , Figure 2 and Figure 3 As shown, a wastewater evaporation system includes an installation assembly in the middle of an evaporation tower 1. The installation assembly includes an upper ring plate 5, a lower ring plate 4, and several reinforcing plates 6. Both the upper ring plate 5 and the lower ring plate 4 are annular, and the outer diameter of the lower ring plate 4 is larger than the outer diameter of the upper ring plate 5. In this embodiment, both the upper ring plate 5 and the lower ring plate 4 are fitted onto the evaporation tower 1 and welded to the evaporation tower 1. Reinforcing plates 7 are provided on the lower side of the lower ring plate 4 and the upper side of the upper ring plate 5. The reinforcing plates 7 are annular, fitted onto the evaporation tower 1, and welded to the evaporation tower 1. The top of the lower reinforcing plate 7 is welded to the lower ring plate 4, and the bottom of the upper reinforcing plate 7 is welded to the upper ring plate 5. The lower ring plate 4 has several fixing holes 41 along its circumference. Ribs 6 are distributed on both sides of the fixing holes 41. The ribs 6 are in the shape of right trapezoids. The bottom, top and sidewalls of the ribs 6 facing the evaporator tower 1 are welded to the lower ring plate 4, the upper ring plate 5 and the evaporator tower 1 respectively.

[0036] The upper portion of the evaporation tower 1 is provided with a limiting assembly, the limiting assembly comprises a windproof ring 8 and a plurality of connecting pieces 81, the windproof ring 8 is annular and is sleeved on the evaporation tower 1, the windproof ring 8 is welded and fixed with the evaporation tower 1, the plurality of connecting pieces 81 are uniformly distributed along the circumference of the evaporation tower 1, the connecting piece 81 in the embodiment adopts a channel steel, one end of the connecting piece 81 is welded on the connecting piece 81, the other end extends away from the evaporation tower 1, and the end of the connecting piece 81 away from the evaporation tower 1 is projected on the outer side of the windproof ring 8 along the vertical direction, and the connecting piece 81 extends along the diameter direction of the evaporation tower 1.

[0037] The top of the evaporation tower 1 is provided with an opening, and the opening position is provided with a mounting bracket 2, the mounting bracket 2 in the embodiment is a cross-shaped, and the mounting bracket 2 is mounted on the evaporation tower 1 by bolts. The top of the evaporation tower 1 is coaxially provided with a gas inlet, specifically, the gas inlet is communicated with an air inlet pipe 11, the air inlet pipe 11 is communicated with a heat exchanger 9, the heat exchanger 9 in the embodiment adopts the prior art, the heat exchanger 9 comprises a heat source inlet 91, a heat source outlet 92, a secondary air inlet 93 and a secondary air outlet 94, and the air inlet pipe 11 is communicated with the secondary air outlet 94. The top of the evaporation tower 1 is vertically provided with three atomizing lances 3, and the three atomizing lances 3 are uniformly distributed along the circumference of the gas inlet, and the atomizing lances 3 are all mounted on the mounting bracket 2.

[0038] The bottom of the evaporation tower 1 is funnel-shaped, and the bottom of the evaporation tower 1 is provided with an ash outlet 13, and an ash outlet cover is arranged to close the ash outlet 13, specifically, the ash outlet cover is connected with the ash outlet 13 by screws. The lower portion of the evaporation tower 1 is provided with a gas outlet 12 and a manhole 14, and the manhole 14 is provided with a manhole cover 14 which is installed at the position of the manhole 14 by screws to close the manhole 14.

[0039] The specific implementation process is as follows:

[0040] When the compressed waste water is dried, the secondary air inlet 93 or the dust outlet can be connected with the induced draft fan of the outside, or the air pump can be connected between the secondary air outlet 94 and the air inlet pipe 11, so as to promote the air to enter the heat exchanger 9 through the secondary air inlet 93, then flow out from the secondary air outlet 94, and then quickly enter the top of the evaporation tower 1 through the air inlet pipe 11, and finally flow out from the gas outlet 12, at this time, the gas outlet 12 is communicated with the dust removal device of the outside, so as to filter the gas mixed with dry dust and collect the dry dust.

[0041] In the above process, the high-temperature flue gas enters the heat exchanger 9 through the heat source inlet 91, heats the air entering through the secondary air inlet 93, and the high-temperature flue gas with reduced temperature is discharged from the heat source outlet 92, facilitating centralized treatment. The concentrated wastewater is uniformly sprayed into the top of the evaporation tower 1 through the three atomizing lances 3, contacts the high-temperature air entering through the gas inlet, and moves downward with the high-temperature air. In the process of moving downward, the water in the atomized wastewater gradually evaporates to form water vapor under the action of high temperature, and the precipitate in the wastewater forms dry powder dust. The dry powder dust moves to the lower part of the evaporation tower 1 with the airflow, and the dry powder dust with larger particle size precipitates at the bottom of the evaporation tower 1. The dry powder dust with relatively small particle size is discharged from the gas outlet 12 with the airflow.

[0042] When the dry powder dust accumulated at the bottom of the evaporation tower 1 is too much, stop feeding the high-temperature gas and the atomized wastewater into the evaporation tower 1, and then open the ash outlet 13 to take out the accumulated dry powder dust. When the evaporation tower 1 fails, the high-temperature gas and the atomized wastewater are also stopped from being fed into the evaporation tower 1, the manhole 14 is opened, the maintenance personnel enter the evaporation tower 1 through the manhole 14 for maintenance, and after the maintenance is completed, the manhole 14 is closed.

[0043] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A wastewater evaporation system, comprising an evaporation tower, wherein the evaporation tower is provided with a gas inlet and a gas outlet, characterized in that: The evaporation tower is vertically arranged, with the gas inlet located at the top and the gas outlet located at the bottom. An atomizing spray gun is connected to the top of the evaporation tower, and the orientation of the atomizing spray gun and the gas inlet are both set along the height direction of the evaporation tower.

2. The wastewater evaporation system according to claim 1, characterized in that: An installation assembly is provided in the middle of the evaporation tower. The installation assembly is annular and has an L-shaped cross-section along the vertical direction.

3. The wastewater evaporation system according to claim 2, characterized in that: The mounting assembly includes an upper ring plate, a lower ring plate, and several stiffening plates. The upper and lower ring plates are both fitted onto the outer wall of the evaporation tower. The stiffening plates are located between the upper and lower ring plates and distributed along the circumference of the evaporation tower. The two ends of the stiffening plates are fixed to the upper and lower ring plates respectively and abut against the side wall of the evaporation tower.

4. The wastewater evaporation system according to claim 3, characterized in that: The outer diameter of the lower ring plate is larger than that of the upper ring plate. Several fixing holes are provided along the circumferential direction of the lower ring plate, and there are stiffening plates on both sides of each fixing hole.

5. A wastewater evaporation system according to claim 4, characterized in that: A reinforcing plate is provided on the lower side of the lower ring plate and the upper side of the upper ring plate. The reinforcing plate is sleeved on the outside of the evaporation tower and fixed to the lower ring plate or the upper ring plate.

6. The wastewater evaporation system according to claim 1, characterized in that: A heat exchanger is connected to the gas inlet. The heat exchanger has a heat source inlet, a heat source outlet, a secondary air inlet, and a secondary air outlet. The secondary air outlet is connected to the gas inlet.

7. The wastewater evaporation system according to claim 1, characterized in that: The system has multiple atomizing spray guns, with the gas inlet coaxial with the evaporation tower, and the multiple atomizing spray guns are evenly distributed around the gas inlet.

8. A wastewater evaporation system according to claim 7, characterized in that: The top of the evaporation tower is equipped with a mounting bracket, and the atomizing spray gun is connected to the mounting bracket.

9. A wastewater evaporation system according to claim 1, characterized in that: The upper part of the evaporator is provided with a limiting component, which includes a windproof ring and several connecting parts. The windproof ring is fitted on the evaporator and fixedly connected to the evaporator. The several connecting parts are distributed along the circumference of the evaporator and fixed to the windproof ring.

10. A wastewater evaporation system according to claim 1, characterized in that: The lower part of the evaporation tower is equipped with a sealable manhole.

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