A wastewater treatment device dedicated to the coal pyrolysis industry

Abstract

The utility model relates to waste water treatment technical field, specifically disclose a kind of wastewater treatment equipment specially used for coal pyrolysis industry, comprising: pretreatment tank, the top side wall and bottom of pretreatment tank are equipped with feed pipe and discharge pipe respectively;Cleaning assembly, including with the cleaning liquid pipe of the pretreatment tank top intercommunication, with the discharge pipe intercommunication of the discharge pipe of the pretreatment tank bottom side wall intercommunication and the backflushing pipe, the end of the cleaning liquid pipe is equipped with the nozzle that can along the vertical sliding of the pretreatment tank;Drive assembly for driving the vertical movement of the nozzle, the utility model solves the problem that in the pretreatment of the wastewater of traditional low-rank coal pyrolysis industry, not removed oil, dust is attached on oleophilic steel material, and in high temperature condition, and the process equipment in the problem of dirt blocking pretreatment process is unstabilized.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and specifically discloses a wastewater treatment device for the coal pyrolysis industry. Background Technology

[0002] Low-rank coal is characterized by low coalification, high volatile matter, high moisture content, and low calorific value. When heated to a certain temperature in the absence of air, low-rank coal undergoes a series of physical and chemical reactions, leading to the breakage of cross-links in the carbon structure, product recombination, and secondary reactions, ultimately producing coke (or semi-coke), coal tar, crude benzene, and coal gas. This process is known as low-rank coal pyrolysis. Low-rank coal pyrolysis is an important clean and efficient coal conversion technology, offering advantages such as improved resource utilization efficiency, mild production conditions, and good environmental performance. However, this technology still faces some bottlenecks, such as the incomplete breakthrough in pulverized coal pyrolysis technology, difficulties in high-temperature oil and gas dust removal, and challenges in wastewater treatment.

[0003] The main reason for the difficulty in treating wastewater generated during the pyrolysis of low-rank coal is that it contains a large amount of recalcitrant organic matter, such as aromatic compounds and heterocyclic compounds, which are difficult for microorganisms to completely decompose during conventional biochemical treatment. Furthermore, the wastewater also contains pollutants such as ammonia nitrogen and volatile phenols, further increasing the difficulty of treatment.

[0004] In current wastewater treatment in the low-rank coal pyrolysis industry, the main approach relies on adding flocculants to form flocs from suspended solids and some organic matter in the wastewater, which are then removed by sedimentation. Alternatively, microbial anaerobic and aerobic processes can be used to degrade organic pollutants in the wastewater, while also partially removing ammonia nitrogen. However, microorganisms have high requirements for influent water quality, necessitating pretreatment to remove suspended solids and adjust pH. During pretreatment, emulsified oil exists stably in the wastewater with a relative density close to 1, making it difficult to remove naturally after reaching sedimentation equilibrium. Unremoved oil and dust adhere to oleophilic steel materials and destabilize under high-temperature conditions, clogging the pretreatment equipment. Therefore, the inventor has proposed a wastewater treatment device specifically designed for the coal pyrolysis industry to address these problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the pretreatment of wastewater from the traditional low-rank coal pyrolysis industry where unremoved oil and dust adhere to oleophilic steel materials and destabilize under high temperature conditions, clogging the process equipment in the pretreatment process.

[0006] To achieve the above objectives, the basic solution of this utility model provides a wastewater treatment device specifically for the coal pyrolysis industry, comprising: A pretreatment tank, wherein the top side wall and the bottom of the pretreatment tank are respectively provided with an inlet pipe and an outlet pipe; The cleaning assembly includes a cleaning liquid pipe communicating with the top of the pretreatment tank, a discharge pipe communicating with the bottom side wall of the pretreatment tank, and a backflush pipe communicating with the discharge pipe. The end of the cleaning liquid pipe is provided with a nozzle that can slide vertically along the pretreatment tank. A drive assembly for driving the vertical movement of the nozzle.

[0007] The principle and effect of this basic scheme are as follows: Compared with existing technologies, this utility model, by setting up a cleaning liquid pipe and a backflushing pipe, can promptly and conveniently clean oil, dust, and other substances adhering to the inner walls of the pretreatment tank and discharge pipe after pretreatment of wastewater generated in low-rank coal pyrolysis. This avoids oil, dust, and other substances clogging other equipment, and solves the problem in the traditional low-rank coal pyrolysis industry where unremoved oil and dust adhere to oleophilic steel materials during wastewater pretreatment and destabilize under high temperature conditions, clogging the process equipment in the pretreatment process.

[0008] Furthermore, the discharge pipe is equipped with at least two control valves, and the end of the backflushing pipe is connected between two adjacent control valves. This arrangement facilitates the thorough removal of oil, dust, and other substances adhering to the inner wall of the discharge pipe.

[0009] Furthermore, the driving component includes: A drive chamber is located at the top of the pretreatment tank; An airbag is vertically disposed within the drive chamber, and the bottom of the airbag is connected to the nozzle; The trachea is connected to the airbag; An air pump is installed on the air pipe.

[0010] By filling or extracting gas into the airbag with an air pump, the expansion and contraction of the airbag is controlled, thereby driving the vertical movement of the nozzle. This allows for control of the nozzle's expansion and contraction within a smaller space, thus saving equipment space.

[0011] Furthermore, the airbag includes an inner body and an outer body, with a sealed air cavity formed between the inner and outer bodies that communicates with the trachea. This design allows for the use of an air pump to fill or extract gas into the airbag, thereby controlling the overall contraction of the airbag.

[0012] Furthermore, the top of the inner bladder is connected to the end of the cleaning fluid tube, and the bottom of the inner bladder is connected to the nozzle. A flow channel is provided through the inner bladder to connect the cleaning fluid tube and the nozzle. This design facilitates a stable supply of cleaning fluid to the nozzle even when the nozzle height is adjusted.

[0013] Furthermore, the bottom of the outer capsule is provided with a mounting plate that seals the bottom of the sealed air chamber, and the nozzle is mounted on the mounting plate. The mounting plate not only facilitates the installation of the nozzle, but also protects and seals the sealed air chamber.

[0014] Furthermore, the nozzle is provided with several water outlet holes facing the sidewall and bottom of the pretreatment tank. This facilitates the cleaning of oil, dust, and other substances adhering to the sidewall and bottom of the pretreatment tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This illustration shows a schematic diagram of a wastewater treatment device specifically designed for the coal pyrolysis industry, as proposed in an embodiment of this application. Figure 2 This paper shows an isometric view of a pretreatment tank in a wastewater treatment device specifically designed for the coal pyrolysis industry, according to an embodiment of this application. Figure 3 This paper shows a schematic diagram of the internal structure of the drive chamber in a wastewater treatment device specifically designed for the coal pyrolysis industry, according to an embodiment of this application. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] The reference numerals in the accompanying drawings include: pretreatment tank 1, auxiliary tank 2, feed pipe 3, discharge pipe 4, backflush pipe 5, discharge pipe 6, air pipe 7, cleaning liquid pipe 8, inner capsule 9, outer capsule 10, mounting plate 11, and nozzle 12.

[0019] A wastewater treatment device specifically designed for the coal pyrolysis industry, implementing, for example... Figure 1 As shown: It includes a pretreatment tank 1 for pretreating wastewater generated during the pyrolysis of low-rank coal, an auxiliary tank 2 located on top of the pretreatment tank 1, a cleaning assembly for cleaning oil, dust and other substances adhering to the inner wall of the pretreatment tank 1 after pretreatment, and a drive assembly for driving the cleaning assembly.

[0020] The pretreatment tank 1 is provided with a feed pipe 3 on the top side wall and a discharge pipe 4 on the bottom. The cleaning components include a cleaning liquid pipe 8 connected to the top of the pretreatment tank 1, a discharge pipe 6 connected to the bottom side wall of the pretreatment tank 1, and a backflushing pipe 5 connected to the discharge pipe 4.

[0021] like Figure 1 As shown, a control valve is provided on the feed pipe 3, discharge pipe 6 and backflush pipe 5 to control their connection or disconnection. Two control valves are provided on the discharge pipe 4, located on both sides of the connection between the discharge pipe 4 and the backflush pipe 5, that is, the end of the backflush pipe 5 is connected between two adjacent control valves.

[0022] like Figure 2 and Figure 3 As shown, the cleaning assembly also includes a nozzle 12 disposed inside the pretreatment tank 1. The nozzle 12 is provided with several water outlet holes facing the side wall and bottom of the pretreatment tank 1. The drive assembly is used to adjust the vertical position of the nozzle 12.

[0023] The drive assembly includes a drive chamber located in an auxiliary tank 2 at the top of the pretreatment tank 1, an airbag vertically located in the drive chamber, an air pipe 7 connected to the airbag, and an air pump located on the air pipe 7. The airbag includes an inner bladder 9 and an outer bladder 10, forming a sealed air chamber connected to the air pipe 7 between the inner bladder 9 and the outer bladder 10. The bottom of the outer bladder 10 is provided with a mounting plate 11 that seals the bottom of the sealed air chamber. The nozzle 12 is located on the mounting plate 11. The top of the inner bladder 9 is connected to the end of the cleaning liquid pipe 8, and the bottom of the inner bladder 9 is connected to the nozzle 12. A guide channel is provided through the inner bladder 9 to connect the cleaning liquid pipe 8 and the nozzle 12.

[0024] like Figure 1 As shown, after pretreatment of the wastewater generated during the pyrolysis of low-rank coal, residual oil and dust tend to accumulate on the inner walls of the pretreatment tank 1 and the discharge pipe 4. At this point, closing the valve on the right side of the backflush pipe 5 on the discharge pipe 4 and opening the valve on the left side of the backflush pipe 5 allows the backflush liquid or backflush gas in the backflush pipe 5 to enter the pretreatment tank 1 through the discharge pipe 4 and be discharged through the discharge pipe 6. Simultaneously, if... Figure 3 As shown, gas is filled or extracted into the sealed air chamber by an air pump, thereby controlling the expansion and contraction of the airbag to drive the nozzle 12 to move vertically, thus cleaning the inner wall of the pretreatment tank 1.

[0025] Compared with the prior art, this utility model, by setting up a cleaning liquid pipe 8 and a backflush pipe 5, can promptly and conveniently clean the oil, dust and other substances adhering to the inner wall of the pretreatment tank 1 and the discharge pipe 4 after the wastewater generated in the pyrolysis of low-rank coal is pretreated. This avoids the oil, dust and other substances clogging other equipment, and solves the problem in the traditional pretreatment of wastewater in the low-rank coal pyrolysis industry where the oil and dust that have not been removed adhere to the oleophilic steel material and destabilize under high temperature conditions, clogging the process equipment in the pretreatment process.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wastewater treatment device specifically designed for the coal pyrolysis industry, characterized in that, include: A pretreatment tank, wherein the top side wall and the bottom of the pretreatment tank are respectively provided with an inlet pipe and an outlet pipe; The cleaning assembly includes a cleaning liquid pipe communicating with the top of the pretreatment tank, a discharge pipe communicating with the bottom side wall of the pretreatment tank, and a backflush pipe communicating with the discharge pipe. The end of the cleaning liquid pipe is provided with a nozzle that can slide vertically along the pretreatment tank. A drive assembly for driving the vertical movement of the nozzle.

2. The wastewater treatment equipment specifically designed for the coal pyrolysis industry according to claim 1, characterized in that, The discharge pipe is equipped with at least two control valves, and the end of the backflush pipe is connected between two adjacent control valves.

3. The wastewater treatment equipment specifically designed for the coal pyrolysis industry according to claim 1, characterized in that, The driving component includes: A drive chamber is located at the top of the pretreatment tank; An airbag is vertically disposed within the drive chamber, and the bottom of the airbag is connected to the nozzle; The trachea is connected to the airbag; An air pump is installed on the air pipe.

4. A wastewater treatment device specifically designed for the coal pyrolysis industry according to claim 3, characterized in that, The airbag includes an inner bladder and an outer bladder, and a closed air cavity is formed between the inner bladder and the outer bladder, which is connected to the trachea.

5. A wastewater treatment device specifically designed for the coal pyrolysis industry according to claim 4, characterized in that, The top of the inner bladder is connected to the end of the cleaning fluid tube, the bottom of the inner bladder is connected to the nozzle, and a flow channel is provided through the inner bladder to connect the cleaning fluid tube and the nozzle.

6. A wastewater treatment device specifically designed for the coal pyrolysis industry according to claim 5, characterized in that, The bottom of the outer capsule is provided with a mounting plate that seals the bottom of the sealed air chamber, and the nozzle is mounted on the mounting plate.

7. A wastewater treatment device specifically designed for the coal pyrolysis industry according to claim 1, characterized in that, The nozzle is provided with several water outlet holes facing the side wall and bottom of the pretreatment tank.

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