Chemical feeding device for coal gasification process water system
By designing a dosing device for the coal gasification process water system, the two dosing devices for the coal gasification process water and the buffering of the wastewater storage tank is achieved, and the problems of precipitation of minerals such as calcium, magnesium, aluminum, iron, silicon, etc. are solved, ensuring the stable operation of the device water circulation system and the accurate configuration of the agent.
Patent Information
- Application Number
- CN202421218040.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In the water system of the coal gasification process, due to the precipitation of minerals such as calcium, magnesium, aluminum, iron, silicon, etc., the pipeline is blocked and equipment is damaged, and the amount of agent added is unstable, which can easily cause scaling and affect the operation of the device.
Design a dosing device for gasification process water system, including a gasification process water storage tank, a wastewater storage tank, a first dosing tee and a second dosing tee. By setting up a dosing unit and a dispensing system, two dosings of gasification process water are realized, and automated control is carried out through the DCS system to ensure the accurate configuration and stable supply of the agent.
Through the two dosing and buffering of the wastewater storage tank, the stability of the gasification process water is ensured, pipeline blockage and equipment damage are avoided, the stable operation of the water circulation system of the device is achieved, and the risk of unstable drug addition is reduced.
Smart Images
Figure CN222631099U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal gasification production, in particular to a dosing device for a coal gasification process water system. Background Art
[0002] Calcium, magnesium, aluminum, iron, silicon and other minerals contained in coal react with oxygen in the gasifier to generate synthesis gas and waste residue, which enter the gas washing system. The waste residue enters the water system, and the synthesis gas and waste residue are separated. During the water washing process, calcium, magnesium, aluminum, iron, silicon and other minerals contained in coal enter the process water system. The process water is circulated in the equipment and pipelines. Under high temperature and high pressure, suspended matter, calcium and magnesium ions and coal dust particles in the process water are precipitated and attached to the pipelines and equipment, causing pipeline blockage.
[0003] During the process water circulation process of coal chemical plant operation, flocculants are added to the process water to precipitate suspended matter, calcium ions, magnesium ions and silicon ions in the water. At the same time, dispersants need to be added when entering the system for circulation to slow down the structure of pipelines and equipment. As we all know, due to the different flow rates of process water and the concentrations of various substances, the amount of reagents added is unstable, which can easily cause suspended matter, calcium and magnesium ions and coal dust particles carried in the process water to precipitate and scale, damaging equipment. In severe cases, it can cause the plant to shut down, equipment to be damaged, and safety accidents to occur. Utility Model Content
[0004] The utility model aims to provide a dosing device for a coal gasification process water system to overcome the defects in the prior art.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A dosing device for a coal gasification process water system, the dosing device comprises a coal gasification process water storage tank, the coal gasification process water storage tank is connected to a water circulation system of the device, a dosing unit for dosing the coal gasification process water is arranged between the coal gasification process water storage tank and the water circulation system of the device; the dosing unit comprises a wastewater storage tank arranged between the coal gasification process water storage tank and the water circulation system of the device, a first dosing tee is arranged at the front of the wastewater storage tank, and a second dosing tee is arranged at the rear of the wastewater storage tank; the third end of the first dosing tee and the third end of the second dosing tee are respectively connected to at least one set of dispensing system.
[0007] The beneficial effects of the utility model are as follows: the utility model arranges a dosing unit between the coal gasification process water storage tank and the water circulation system of the device, and arranges a wastewater storage tank in the dosing unit to buffer the coal gasification process water. On the basis of the wastewater storage tank, a first dosing tee and a second dosing tee are arranged to achieve two dosing of the coal gasification process water, so as to fully dosing the water according to the actual situation of the coal gasification process water, so as to ensure the stable operation of the water circulation system of the device.
[0008] Preferably, the drug dispensing system comprises a drug dispensing storage tank, the inlet of which is respectively connected to the drug slurry conveying member and the diluent conveying member, and the drug dispensing storage tank is provided with a stirring motor with stirring blades and a liquid level meter.
[0009] Preferably, the medicine slurry conveying member comprises a medicine slurry storage tank, and the outlet of the medicine slurry storage tank is connected to the inlet of the medicine preparation storage tank through a medicine slurry pump.
[0010] Preferably, the diluent conveying member comprises a diluent storage tank, and the outlet of the diluent storage tank is connected to the inlet of the medication storage tank via a diluent control valve.
[0011] Preferably, the drug dispensing system comprises two sets, and a drug slurry flow meter is respectively provided between the drug slurry conveying member and the inlets of the two drug dispensing storage tanks; and a diluent flow meter is respectively provided between the diluent conveying member and the inlets of the two drug dispensing storage tanks.
[0012] Preferably, the outlets of the two drug dispensing storage tanks are connected to the drug dosing delivery pump through corresponding control valves, and the outlets of the drug dosing delivery pump are connected to the third end of the first drug dosing tee and the third end of the second drug dosing tee.
[0013] Preferably, a first flowmeter and a first drug control valve are provided in sequence between the outlet of the dosing pump and the third end of the first dosing tee, and a second flowmeter and a second drug control valve are provided in sequence between the outlet of the dosing pump and the third end of the second dosing tee.
[0014] Preferably, a wastewater delivery pump is provided between the second dosing tee and the device water circulation system.
[0015] The utility model also includes a DCS system, the signal input end of the DCS system is respectively connected to the slurry flowmeter, the diluent flowmeter, the liquid level meter, the first waste liquid flowmeter, the second waste liquid flowmeter, the first water quality detector, the second water quality detector, the first flowmeter and the second flowmeter; the signal output end of the DCS system is respectively connected to the diluent control valve, the stirring motor, the control valve, the first agent control valve and the second agent control valve.
[0016] Preferably, the first waste liquid flow meter and the first water quality detector are arranged between the coal gasification process water storage tank and the first dosing tee, and the second waste liquid flow meter and the second water quality detector are arranged between the waste water storage tank and the second dosing tee.
[0017] A dosing device for a coal gasification process water system is manufactured according to the above scheme. The utility model sets a dosing unit between the coal gasification process water storage tank and the water circulation system of the device, and sets a first dosing tee and a second dosing tee on both sides of the wastewater storage tank in the dosing unit, which can realize two dosing of the coal gasification process water. At the same time, the wastewater storage tank buffers the coal gasification process water, so as to achieve the advantage of ensuring the stable operation of the water circulation system of the device under the premise of continuously supplying circulating water to the water circulation system of the device; the utility model can accurately configure the corresponding concentration of liquid medicine by setting the dispensing system, so as to ensure the subsequent accurate dosing of the coal gasification process water and avoid the subsequent scaling phenomenon; at the same time, by setting two sets of dispensing systems, the liquid medicine can be statically configured to ensure the concentration of the liquid medicine and realize the dynamic delivery of the liquid medicine to the dosing unit to ensure the continuous and stable operation of the water circulation system of the device; the utility model preferably adopts a DCS system to control the dosing unit and the dispensing system, so as to improve the accuracy and reduce the labor intensity of the operators. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model.
[0019] Figure 2 This is the control principle diagram of the utility model.
[0020] In the figure: 1. coal gasification process water storage tank; 2. first reagent control valve; 3. wastewater storage tank; 4. second reagent control valve; 5. DCS system; 6. liquid level meter; 7. dosing pump; 8. wastewater pump; 9. device water circulation system; 10. stirring motor; 11. reagent storage tank; 12. control valve; 13. first dosing tee; 14. second dosing tee; 15. slurry flowmeter; 16. diluent flowmeter; 17. diluent storage tank; 18. slurry pump; 19. slurry storage tank; 20. diluent control valve; 21. first flowmeter; 22. second flowmeter; 23. first waste liquid flowmeter; 24. second waste liquid flowmeter; 25. first water quality detector; 26. second water quality detector. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0022] Reference Figure 1As shown, a dosing device for a coal gasification process water system comprises a coal gasification process water storage tank 1, which is connected to a water circulation system 9 of the device, and a dosing unit for dosing the coal gasification process water is provided between the coal gasification process water storage tank 1 and the water circulation system 9 of the device; the dosing unit comprises a wastewater storage tank 3 arranged between the coal gasification process water storage tank 1 and the water circulation system 9 of the device, a first dosing tee 13 is provided at the front of the wastewater storage tank 3, and a second dosing tee 14 is provided at the rear of the wastewater storage tank 3; the third end of the first dosing tee 13 and the third end of the second dosing tee 14 are respectively connected to at least one set of dispensing system. The utility model can buffer the coal gasification process water from the coal gasification process water storage tank 1 by setting the wastewater storage tank 3, especially after the first dosing through the first dosing tee 13, the dosing can also be fully mixed with the coal gasification process water, providing a basis for the second accurate dosing. The above method changes the defect of inaccurate dosing amount caused by one-time dosing in the traditional technology.
[0023] Furthermore, the dispensing system includes a dispensing tank 11, the inlet of which is connected to the medicine slurry conveying member and the diluent conveying member respectively, and the dispensing tank 11 is provided with a stirring motor 10 with stirring blades and a liquid level meter 6. The utility model conveys medicine slurry and diluent into the dispensing tank 11 through the medicine slurry conveying member and the diluent conveying member, and achieves full mixing of the medicine slurry and the diluent through the stirring motor 10; further, the liquid level meter 6 can not only detect the amount of medicine in the dispensing tank 11, but also determine the concentration of the medicine in the dispensing system by measuring the volume of the medicine slurry and the diluent respectively.
[0024] Furthermore, the medicine slurry conveying member includes a medicine slurry storage tank 19 , and an outlet of the medicine slurry storage tank 19 is connected to an inlet of the medicine preparation tank 11 through a medicine slurry pump 18 .
[0025] Furthermore, the diluent conveying member includes a diluent storage tank 17 , and an outlet of the diluent storage tank 17 is connected to an inlet of the medication storage tank 11 via a diluent control valve 20 .
[0026] Furthermore, the drug dispensing system is composed of two sets, and a drug slurry flowmeter 15 is respectively provided between the drug slurry conveying member and the inlet of the two drug dispensing storage tanks 11; and a diluent flowmeter 16 is respectively provided between the diluent conveying member and the inlet of the two drug dispensing storage tanks 11. By setting up two drug dispensing storage tanks 11, and by the two drug dispensing storage tanks 11 respectively cooperating with the drug slurry conveying member and the diluent conveying member, it is possible to realize one start and one standby of the two drug dispensing storage tanks 11, so as to meet the working forms of static configuration of drug liquid and continuous delivery of drug liquid, so as to achieve the characteristics of accurate configuration of drug liquid and ensuring continuous delivery of coal gasification process water to the water circulation system 9 of the device.
[0027] Furthermore, the outlets of the two drug dispensing storage tanks 11 are respectively connected to the drug dispensing delivery pump 7 through corresponding control valves 12, and the outlets of the drug dispensing delivery pump 7 are respectively connected to the third end of the first drug dispensing tee 13 and the third end of the second drug dispensing tee 14. By providing two control valves 12 corresponding to the drug dispensing storage tanks 11, the characteristic of convenient control can be achieved.
[0028] Furthermore, a first flowmeter 21 and a first reagent control valve 2 are sequentially provided between the outlet of the dosing pump 7 and the third end of the first dosing tee 13, and a second flowmeter 22 and a second reagent control valve 4 are sequentially provided between the outlet of the dosing pump 7 and the third end of the second dosing tee 14. The above arrangement can achieve the purpose of precise control of the first and second dosing, and the characteristic of late scaling of the coal gasification process water can be avoided by precise control of the dosing amount.
[0029] Furthermore, a wastewater delivery pump 8 is provided between the second dosing tee 14 and the device water circulation system 9 .
[0030] Reference Figure 1-2 As shown, the utility model further includes a DCS system 5, the signal input end of the DCS system 5 is respectively connected to the slurry flowmeter 15, the diluent flowmeter 16, the liquid level meter 6, the first waste liquid flowmeter 23, the second waste liquid flowmeter 24, the first water quality detector 25, the second water quality detector 26, the first flowmeter 21 and the second flowmeter 22; the signal output end of the DCS system 5 is respectively connected to the diluent control valve 20, the stirring motor 10, the control valve 12, the first agent control valve 2 and the second agent control valve 4. The utility model can be controlled manually or automatically, and the control includes the control of the dispensing system, realizing the control of the two dispensing storage tanks 11, one on and one off, and the control of the amount of medicine added to the coal gasification process water in the dosing unit.
[0031] Furthermore, the first waste liquid flow meter 23 and the first water quality detector 25 are arranged between the coal gasification process water storage tank 1 and the first dosing tee 13 , and the second waste liquid flow meter 24 and the second water quality detector 26 are arranged between the waste water storage tank 3 and the second dosing tee 14 .
[0032] The working principle of the utility model is as follows: during normal operation, the gasification process water in the gasification process water storage tank 1 is doped once through the first dosing tee 13 and then enters the wastewater storage tank 3; the gasification process water in the wastewater storage tank 3 is doped once through the second dosing tee 14 and then transported to the device water circulation system 9 by the wastewater delivery pump 8; the slurry in the slurry storage tank 19 in the dispensing system is transported into the dispensing storage tank 11 through the slurry pump 18, and the diluent in the diluent storage tank 17 is transported into the dispensing storage tank 11 through the diluent control valve 20, and the above-mentioned diluent and slurry are evenly mixed under the action of the stirring motor 10 with stirring blades. The medicine is uniformly mixed to form a medicine, and the medicine is added to the coal gasification process water through the third end of the first medicine-dosing tee 13 and the third end of the second medicine-dosing tee 14 through the medicine-dosing delivery pump 7; the utility model can adopt automatic control, and the specific operation method is: the diluent in the diluent storage tank 17 and the medicine slurry in the medicine slurry storage tank 19 are respectively transported to one of the preparation storage tanks 11 through the corresponding diluent flowmeter 16 and the medicine slurry flowmeter 15, and the stirring motor 10 is started during and / or after the transportation to rotate the stirring blade to achieve the purpose of preparing the medicine; in the above process, the diluent flowmeter 16 and the medicine slurry flowmeter 15 are used to transfer the materials to one of the preparation storage tanks 11. The meter 15 calculates the amount of diluent and slurry respectively, so as to achieve the purpose of accurately configuring the liquid medicine (the data of the diluent flow meter 16 and the slurry flow meter 15 are transmitted to the DCS system 5, and the DCS system 5 controls the opening and closing of the diluent control valve 16 to achieve the purpose of controlling the concentration of the medicine; the DCS system 5 controls the stirring motor 10 to start to achieve the purpose of uniformly configuring the medicine); in the above-mentioned process of configuring the medicine, another medicine storage tank 11 is used to transport the medicine to the first dosing tee 13 and the second dosing tee 14. During the transportation process, the DCS system 5 controls the corresponding control valve 12 to open, and the medicine input into the first dosing tee 13 is , the data fed back to the DCS system 5 through the first waste liquid flow meter 23 and the first water quality detector 25 controls the opening of the first reagent control valve 2; the data fed back to the DCS system 5 through the second waste liquid flow meter 24 and the second water quality detector 26 controls the opening of the second waste liquid flow meter 24 and the second water quality detector 26; thereby achieving the purpose of accurately adding reagents to the coal gasification process water; when the data fed back in the liquid level meter 6 during the above operation is lower than the preset threshold, the DCS system 5 controls the switching of the corresponding control valve 12, starts the spare preparation tank 11, and the used preparation tank 11 is in the reagent configuration stage. It has the advantages of being able to dosing the coal gasification process water twice, and at the same time, the wastewater storage tank buffers the coal gasification process water, so as to ensure the stable operation of the device water circulation system under the premise of continuously supplying circulating water to the device water circulation system.
[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A dosing device for a coal gasification process water system, the dosing device comprising a coal gasification process water storage tank (1), the coal gasification process water storage tank (1) being connected to a water circulation system (9) of the device, characterized in that: A dosing unit for dosing the coal gasification process water is provided between the coal gasification process water storage tank (1) and the device water circulation system (9); The dosing unit comprises a wastewater storage tank (3) arranged between a coal gasification process water storage tank (1) and a water circulation system (9) of the device, a first dosing tee (13) being arranged at the front of the wastewater storage tank (3), and a second dosing tee (14) being arranged at the rear of the wastewater storage tank (3); The third end of the first dosing tee (13) and the third end of the second dosing tee (14) are respectively connected to at least one set of drug dispensing system.
2. The dosing device for a coal gasification process water system according to claim 1, characterized in that: The medicine dispensing system comprises a medicine dispensing storage tank (11), the inlet of which is connected to a medicine slurry conveying member and a diluent conveying member respectively. The medicine storage tank (11) is provided with a stirring motor (10) with stirring blades and a liquid level meter (6).
3. The dosing device for a coal gasification process water system according to claim 2, characterized in that: The medicine slurry conveying member comprises a medicine slurry storage tank (19), and the outlet of the medicine slurry storage tank (19) is connected to the inlet of the medicine preparation storage tank (11) through a medicine slurry pump (18).
4. The dosing device for a coal gasification process water system according to claim 2, characterized in that: The diluent conveying member comprises a diluent storage tank (17), the outlet of the diluent storage tank (17) being connected to the inlet of the medicine storage tank (11) via a diluent control valve (20).
5. The dosing device for a coal gasification process water system according to claim 2, characterized in that: The medicine dispensing system comprises two sets, wherein a medicine slurry flow meter (15) is provided between the medicine slurry conveying member and the inlets of the two medicine dispensing storage tanks (11), and a diluent flow meter (16) is provided between the diluent conveying member and the inlets of the two medicine dispensing storage tanks (11).
6. The dosing device for a coal gasification process water system according to claim 5, characterized in that: The outlets of the two drug storage tanks (11) are respectively connected to the drug delivery pump (7) through corresponding control valves (12), and the outlets of the drug delivery pump (7) are respectively connected to the third end of the first drug delivery tee (13) and the third end of the second drug delivery tee (14).
7. A dosing device for a coal gasification process water system according to claim 6, characterized in that: A first flow meter (21) and a first drug control valve (2) are provided in sequence between the outlet of the drug delivery pump (7) and the third end of the first drug delivery tee (13); a second flow meter (22) and a second drug control valve (4) are provided in sequence between the outlet of the drug delivery pump (7) and the third end of the second drug delivery tee (14).
8. The dosing device for a coal gasification process water system according to claim 1, characterized in that: A wastewater delivery pump (8) is provided between the second dosing tee (14) and the device water circulation system (9).
9. The dosing device for a coal gasification process water system according to claim 1, characterized in that: The invention also comprises a DCS system (5), wherein a signal input end of the DCS system (5) is respectively connected to a slurry flow meter (15), a diluent flow meter (16), a liquid level meter (6), a first waste liquid flow meter (23), a second waste liquid flow meter (24), a first water quality detector (25), a second water quality detector (26), a first flow meter (21) and a second flow meter (22); and a signal output end of the DCS system (5) is respectively connected to a diluent control valve (20), a stirring motor (10), a control valve (12), a first medicine control valve (2) and a second medicine control valve (4).
10. The dosing device for a coal gasification process water system according to claim 9, characterized in that: The first waste liquid flow meter (23) and the first water quality detector (25) are arranged between the coal gasification process water storage tank (1) and the first dosing tee (13), and the second waste liquid flow meter (24) and the second water quality detector (26) are arranged between the waste water storage tank (3) and the second dosing tee (14).