Waste water recycling device for ironmaking

Abstract

The utility model discloses a wastewater recycling device for ironmaking. The wastewater recycling device comprises a middle water tank, a sand settling tank, a conveying pump, an inclined plate settling tank, an ultrafiltration water inlet tank, a multi-stage serial ultrafiltration treater, a filtered water storage tank, a multi-stage serial reverse osmosis treater and a desalted water storage tank, the middle water tank is communicated with the sand settling tank through a pipeline; and a conveying pump is arranged on a pipeline for communicating the sand setting tank with the inclined plate sedimentation tank. By adopting the device, a large amount of wastewater generated in the ironmaking process can be treated to obtain demineralized water, so that the recycling of wastewater in each link of ironmaking is facilitated, the sewage discharge is reduced, and the effective protection on the environment is realized.

Description

TECHNICAL FIELD

[0001] The application relates to an iron-making wastewater recycling device. BACKGROUND

[0002] In the existing iron-making process, a large amount of various types of wastewater is often generated, and the wastewater is mainly generated in the production of an iron-making sintering branch, a 20 MW power station, a new oxygen station and a lime plant; the wastewater cannot be directly recycled due to poor water quality, and after being treated by an existing clear water treatment device, the wastewater can only be used for blast furnace slag flushing water with limited water consumption, and the slag flushing water link cannot meet the national discharge requirements and cannot complete the recycling of the valuable water resources in the plant area.

[0003] The information disclosed in the background section is only intended to increase the understanding of the overall background of the application and should not be considered as admitting or implying in any form that the information constitutes prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0004] The application provides an iron-making wastewater recycling device, which can realize the recycling of the wastewater generated in each section of the steel-making process in the plant area, effectively utilize water resources and discharge no wastewater.

[0005] The application provides an iron-making wastewater recycling device, which comprises an intermediate water pool, a sand settling tank, a conveying pump, an inclined plate sedimentation tank, an ultrafiltration water inlet pool, a multi-stage series ultrafiltration processor, a filtered water storage tank, a multi-stage series reverse osmosis processor and a desalted water storage tank.

[0006] The intermediate water pool is in pipeline communication with the sand settling tank; the sand settling tank and the inclined plate sedimentation tank are in pipeline communication, and the conveying pump is arranged on the pipeline in communication.

[0007] The inclined plate sedimentation tank and the ultrafiltration water inlet pool are in overflow communication.

[0008] The ultrafiltration water inlet pool is in pipeline communication with the first-stage ultrafiltration processor.

[0009] The N-stage ultrafiltration processor is in pipeline communication with the filtered water storage tank.

[0010] The filtered water storage tank is in pipeline communication with the first-stage reverse osmosis processor.

[0011] The N-stage reverse osmosis processor is in pipeline communication with the salt water storage tank.

[0012] Preferably, the sand settling tank comprises a tank body, an inclined flat plate arranged at the bottom of the tank body, a liquid inlet arranged at one end of the tank body and a liquid outlet arranged at the other end of the tank body.

[0013] Preferably, the application comprises a pump, and the pump is arranged on the pipeline in communication between the intermediate water pool and the sand settling tank.

[0014] Preferably, the ultrafiltration processor comprises: a second ultrafiltration processor, a first ultrafiltration processor; the water inlet of the first ultrafiltration processor is communicated with the filter pipeline; the water outlet of the first ultrafiltration processor is communicated with the water inlet of the second ultrafiltration processor; the water outlet of the second ultrafiltration processor is communicated with the water inlet of the filtered water storage tank.

[0015] Preferably, the reverse osmosis processor comprises: a first reverse osmosis processor, a second reverse osmosis processor; the water inlet of the first reverse osmosis processor is communicated with the water outlet of the filtered water storage tank; the water outlet of the first reverse osmosis processor is communicated with the water inlet of the second reverse osmosis processor; the water outlet of the second reverse osmosis processor is communicated with the water inlet of the desalted water storage tank.

[0016] Preferably, it comprises: a plurality of blowdown valves; the blowdown pipelines of the ultrafiltration processor and the reverse osmosis processor are provided with the blowdown valves.

[0017] The beneficial effects that can be produced by the present application include:

[0018] 1) The ironmaking wastewater recycling device provided by the present application can obtain desalted water by treating a large amount of wastewater generated in the ironmaking process, which is beneficial to realize the recycling of wastewater in each link of ironmaking, reduce sewage discharge, and realize effective protection of the environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The ironmaking wastewater recycling device provided in at least one embodiment of the present application is shown in the schematic view;

[0020] LEGEND:

[0021] Intermediate water pool 44, sand settling tank 41, conveying pump 411, inclined plate sedimentation tank 42, water inlet pipe 421, inclined plate setting area 422, sand settling area 423, overflow port 424, ultrafiltration water inlet pool 43, second ultrafiltration processor 12, first ultrafiltration processor 11, first reverse osmosis processor 31, second reverse osmosis processor 32, desalted water storage tank 3, pump 211, valve 212, blowdown valve 121, filtered water storage tank 1. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0024] The technical means not described in detail in the present application and not used to solve the technical problems of the present application are set according to common knowledge in the art, and various common knowledge setting modes can be implemented.

[0025] Referring to Figure 1 The wastewater recycling device for ironmaking provided by the present application comprises: an intermediate water pool 44, a sand settling tank 41, a conveying pump 411, an inclined plate sedimentation tank 42, an ultrafiltration water inlet pool 43, a multi-stage series ultrafiltration processor, a filtered water storage tank 1, a multi-stage series reverse osmosis processor, and a desalted water storage tank 3.

[0026] The intermediate water pool 44 is used for buffering the wastewater generated in each link of ironmaking, which is conducive to the centralized treatment of the wastewater. The water outlet of the intermediate water pool 44 is connected with the water inlet pipe of the outlet pump 211; the water outlet of the outlet pump 211 is connected with the water inlet pipe of the sand settling tank 41; the water outlet of the sand settling tank 41 is connected with the water inlet pipe of the conveying pump 411; the water outlet of the conveying pump 411 is connected with the water inlet pipe of the inclined plate sedimentation tank 42; the overflow port 424 of the inclined plate sedimentation tank 42 is connected with the ultrafiltration water inlet pool 43, and the purified liquid enters the ultrafiltration water inlet pool 43 through overflow, and the solid content in the liquid is further reduced after standing.

[0027] The water outlet of the ultrafiltration water inlet pool 43 is connected with the liquid inlet pipe of the first-stage ultrafiltration processor, and a pump 211 is arranged on the connecting pipe; the ultrafiltration processors are connected in series, and the liquid outlet of the last-stage ultrafiltration processor is connected with the water inlet pipe of the filtered water storage tank 1.

[0028] The water outlet of the filtered water storage tank 1 is connected with the pipe of the first-stage reverse osmosis processor, and the reverse osmosis processors are connected in series; the last-stage reverse osmosis processor is connected with the pipe of the desalted water storage tank 3, so that the treatment meeting the desalted water standard is obtained, the chloride ion in the part of water meets the requirement of multiple environmental recycling, and the water resource can be effectively utilized by recycling in multiple different links.

[0029] The reverse osmosis processor, the ultrafiltration processor, the inclined plate sedimentation tank 42 and the sand settling tank 41 used in the present application are all commercially available complete equipment. The remaining equipment is also commercially available complete equipment.

[0030] When the device is used for treatment, the conductivity of the water inlet is 1500 μS / cm, the hardness is 150 mg / L, the water inlet amount is 6000 m 3The desalted water after the / d treatment can be used as new water required for production and added for use, or sent to a softened water user for use. The remaining parameters of the inlet water are shown in the following table:

[0031] Serial number Water quality item Unit Detection value 1 pH 8.7 2 Turbidity NTU 3.6 3 Total hardness mg / L 380 4 Total alkalinity mg / L 390 5 Fe mg / L 0.07 6 Chloride ion mg / L 360 7 Conductivity us / cm 1500 8 Total phosphorus mg / L 0.015

[0032] The device is used to transport the wastewater generated in each link of steelmaking to the sand settling tank for preliminary solid-liquid separation, and then further reduce the solid substances in the wastewater through the inclined plate sedimentation tank and the water storage tank, and then the wastewater can be introduced into the ultrafiltration processor for treatment.

[0033] In a specific embodiment, the bottom of the sand settling tank 41 is provided with a flat plate, which is arranged at an acute angle with the tank body to form an inclined plane, so as to improve the sedimentation efficiency of the solids in the fluid. A blowdown pipe is arranged at the extension end of the inclined flat plate for periodic blowdown. A blowdown valve 121 is arranged on the blowdown pipe for controlling blowdown.

[0034] In a specific embodiment, the inclined plate sedimentation tank 42 comprises a tank body, a water inlet pipe 421, an inclined plate arrangement area 422, a sand settling area 423, and an overflow port 424. The inclined plate arrangement area 422 is arranged in the middle of the tank body. A plurality of sedimentation inclined plates are installed in the inclined plate arrangement area 422. The internal cavity of the tank body is divided into an overflow area and a sand settling area 423 by arranging the inclined plate arrangement area 422. The water inlet pipe 421 is arranged on one side of the tank body and communicates with the sand settling area 423. The overflow port 424 is arranged on the other side of the tank body and communicates with the overflow area. After deposition, the fluid overflows into the ultrafiltration water inlet tank 43. A plurality of conical hoppers are arranged at the bottom of the sand settling area 423 to increase the difficulty of sand overflow and periodically discharge the sand through the sand discharge pipe.

[0035] In a specific embodiment, the ultrafiltration processor comprises a second ultrafiltration processor 12 and a first ultrafiltration processor 11. The outlet of the filter communicates with the water inlet of the first ultrafiltration processor 11 through a connecting pipeline, and a pump 211 is arranged on the connecting pipeline. The outlet of the first ultrafiltration processor 11 communicates with the water inlet of the second ultrafiltration processor 12 through a connecting pipeline. The water outlet flow rate of the first ultrafiltration processor 11 is 0.2 tons / hour. The water outlet flow rate of the second ultrafiltration processor 12 is 0.7 tons / hour.

[0036] In a specific embodiment, the second ultrafiltration processor 12 and the first ultrafiltration processor 11 comprise a blowdown pipeline, and a blowdown valve 121 is arranged on the blowdown pipeline.

[0037] In a specific embodiment, the outlet of the second ultrafiltration processor 12 communicates with the water inlet of the filtered water storage tank 1 through a connecting pipeline, and a pump 211 is arranged on the connecting pipeline and opened as needed.

[0038] In a specific embodiment, the reverse osmosis processor comprises: a first reverse osmosis processor 31, a second reverse osmosis processor 32; the water outlet of the filtered water storage tank 1 is respectively communicated with the water inlet of the first reverse osmosis processor 31 and the second reverse osmosis processor 32 through pipelines, and a pump 211 and a valve 212 are arranged on the communicated pipelines at intervals. The water outlets of the first reverse osmosis processor 31 and the second reverse osmosis processor 32 are respectively communicated with the desalted water storage tank 3.

[0039] In a specific embodiment, a blowdown valve 121 is arranged on the blowdown pipeline of the first reverse osmosis processor 31 and the second reverse osmosis processor 32 respectively, for controlling blowdown.

[0040] After the device is applied and installed in Xianfu Iron and Steel, after the device is operated, the stability of water used in each workshop, the stability of qualified water quality, the water recovery amount of sewage, and the work efficiency are effectively improved, the water supply reliability is stabilized, and the cost production of the whole group company is saved.

[0041] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An iron-making wastewater recycling device characterized by comprising: It comprises: an intermediate water pool (44), a grit tank (41), a conveying pump (411), a inclined plate sedimentation tank (42), an ultrafiltration water inlet pool (43), a multi-stage series ultrafiltration processor, a filtered water storage tank (1), a multi-stage series reverse osmosis processor, a desalted water storage tank (3); the intermediate water pool (44) is in communication with the grit tank (41); the grit tank (41) and the inclined plate sedimentation tank (42) are in communication through a pipeline, and the pipeline is provided with the conveying pump (411); the inclined plate sedimentation tank (42) and the ultrafiltration water inlet pool (43) are in overflow communication; the ultrafiltration water inlet pool (43) is in communication with the first-stage ultrafiltration processor; the N-stage ultrafiltration processor is in communication with the filtered water storage tank (1); the filtered water storage tank (1) is in communication with the first-stage reverse osmosis processor; the N-stage reverse osmosis processor is in communication with the desalted water storage tank (3).

2. The wastewater recycling device for ironmaking according to claim 1, characterized by The grit tank (41) comprises:

3. The wastewater recycling device for ironmaking according to claim 1, characterized by a tank body, an inclined flat plate arranged at the bottom of the tank body, a liquid inlet arranged at one end of the tank body, and a liquid outlet arranged at the other end of the tank body. It comprises: a pump (211); 4. The wastewater recycling device for ironmaking according to claim 1, characterized by the pump (211) is arranged on a pipeline in communication between the intermediate water pool (44) and the grit tank (41).

5. The wastewater recycling device for ironmaking according to claim 1, characterized by The ultrafiltration processor comprises:

6. The wastewater recycling device for ironmaking according to claim 1, characterized by a second ultrafiltration processor (12) and a first ultrafiltration processor (11); the water inlet of the first ultrafiltration processor (11) is in communication with the pipeline of the filter; the water outlet of the first ultrafiltration processor (11) is in communication with the water inlet of the second ultrafiltration processor (12); and the water outlet of the second ultrafiltration processor (12) is in communication with the water inlet of the filtered water storage tank (1). The reverse osmosis processor comprises: a first reverse osmosis processor (31) and a second reverse osmosis processor (32); the water inlet of the first reverse osmosis processor (31) is in communication with the water outlet of the filtered water storage tank (1); the water outlet of the first reverse osmosis processor (31) is in communication with the water inlet of the second reverse osmosis processor (32); and the water outlet of the second reverse osmosis processor (32) is in communication with the water inlet of the desalted water storage tank (3). It comprises: a plurality of blowdown valves (121); the blowdown valves (121) are arranged on the blowdown pipelines of the ultrafiltration processor and the reverse osmosis processor.

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