Liquid hazardous waste pretreatment system
Patent Information
- Application Number
- CN202522238814.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-23
AI Technical Summary
[0003]其中液态危废大多为有机或无机溶剂，现有的危废焚烧的方式是直接将所有液态危废收集混合，然后由耐腐蚀泵从储罐内或者吨桶等容器内打入回转窑的喷嘴，通过回转窑加热热源将喷嘴喷出的液滴加热，其中达到燃点的在回转窑内燃烧，含有的水分蒸发成水蒸气，部分燃点较高的组分会沉降在回转窑内其他固体危废上，一同送往后续焚烧炉的二燃室进一步焚烧分解，其中热值相对较高且易燃的废液与热值低的废液混合后，在回转窑内燃烧效果较差，高热值的废液不能被有效利用，并且部分燃点较低的高热值废液在回转窑内蒸发，产生大量不稳定的可燃蒸汽，在回转窑内温度达到这些可燃蒸汽的闪点后会发生爆燃，容易发生危险
[0010]本实用新型的优点：通过分别设有高热值储罐和低热值储罐，将不同热值的废液通过废液雾化泵分别送入回转窑和二燃室，解决了高热值废液在回转窑内燃烧不稳定和高热值废液热能浪费的缺陷，同时废液通过收集槽对其中的固体颗粒杂质分离，通过收集槽内带式过滤装置过滤后的废液不容易堵塞雾化喷嘴，降低回转窑和二燃室的维护频次，降低了故障率。
Smart Images
Figure CN224787140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hazardous waste treatment technology, and in particular to a pretreatment system for liquid hazardous waste. Background Technology
[0002] Industrial enterprises generate a large amount of hazardous waste during production processes. Industrial hazardous waste is mainly in the form of solid and liquid waste. The chemical, pharmaceutical, oil refining, metallurgy, mining, electroplating, and printing and dyeing industries are the main sources of industrial hazardous waste. This includes pharmaceutical waste (HW02), waste drugs and pharmaceuticals (HW03), pesticide waste (HW04), wood preservative waste (HW05), distillation residue (HW11), dye and paint waste (HW12), organic resin waste (HW13), new chemical waste (HW14), photosensitive material waste (HW16), phenol-containing waste (HW39), and waste containing organohalides (HW45), etc. These hazardous wastes vary considerably in nature; some are toxic, corrosive, and volatile, requiring specialized incineration or recycling, separation, and purification technologies for harmless treatment.
[0003] Most of the liquid hazardous waste consists of organic or inorganic solvents. Current hazardous waste incineration methods involve directly collecting and mixing all the liquid hazardous waste, then pumping it from storage tanks or containers like tonnes into the nozzles of a rotary kiln using corrosion-resistant pumps. The rotary kiln's heat source heats the droplets sprayed from the nozzles; those reaching their ignition point burn within the kiln, while the contained moisture evaporates into steam. Some components with higher ignition points settle onto other solid hazardous waste within the kiln and are then sent to the secondary combustion chamber of a subsequent incinerator for further combustion and decomposition. However, when high-calorific-value and flammable waste liquids are mixed with low-calorific-value waste liquids, the combustion effect within the rotary kiln is poor. The high-calorific-value waste liquids cannot be effectively utilized, and some high-calorific-value waste liquids with lower ignition points evaporate within the kiln, producing large amounts of unstable flammable vapors. When the temperature inside the kiln reaches the flash point of these flammable vapors, deflagration can occur, posing a significant hazard. Furthermore, the collected waste liquids may contain a large number of solid particles, which can easily clog the nozzles after being pumped into the rotary kiln, requiring frequent nozzle cleaning. Utility Model Content
[0004] The purpose of this invention is to provide a liquid hazardous waste pretreatment system to solve the problems existing in the prior art.
[0005] This utility model is implemented by the following technical solution: a liquid hazardous waste pretreatment system, including a collection tank, a first transfer pump, a high-calorific-value storage tank, a second transfer pump, a low-calorific-value storage tank, a waste liquid atomizing pump, and a continuous dryer. It is provided with two collection tanks and two waste liquid atomizing pumps. The bottom outlet of one collection tank is connected to the inlet of the first transfer pump, and the outlet of the first transfer pump is connected to the inlet of the high-calorific-value storage tank. The bottom outlet of the other collection tank is connected to the inlet of the second transfer pump, and the outlet of the second transfer pump is connected to the inlet of the low-calorific-value storage tank. The outlets of the high-calorific-value storage tank and the low-calorific-value storage tank are respectively connected to the inlets of the two waste liquid atomizing pumps. The slag outlet of the collection tank is connected to the inlet of the continuous dryer through a conveyor belt.
[0006] Furthermore, the collection tank includes a filtrate chamber, a filter residue chamber, a belt filter device, and a jet cleaning device. A filter residue chamber is provided on one side of the filtrate chamber. The top of the filtrate chamber is open, and the bottom of the filtrate chamber has a liquid outlet. The belt filter device is placed inside the filtrate chamber and the filter residue chamber. The belt filter device includes a head roller, a tail roller, a filter belt, and a drive device. The head roller is installed inside the filtrate chamber, and the tail roller is installed inside the filter residue chamber. A filter belt is wound around the head roller and the tail roller. A drive device is fixedly installed on the filtrate chamber. The drive device is connected to the head roller and the tail roller for transmission. The filter belt passes through the side walls adjacent to the filtrate chamber and the filter residue chamber. A jet cleaning device is installed at the tail roller inside the filter residue chamber. The jet cleaning device is located between the upper and lower layers of the filter belt.
[0007] Furthermore, the filter residue bin includes a vertical section, an inclined section, and a collection bin. The vertical section is connected to one side of the filtrate bin. An inclined section is located below the vertical section. A collection bin is connected to the bottom of the inclined section. A sieve plate is inclined at the top of the collection bin and at the position where the inclined section connects to the collection bin. The end edge of the sieve plate is flush with the bottom of the inclined section. A drain pipe connected to the filtrate bin is located at the bottom of the collection bin.
[0008] Furthermore, the spraying device includes a spray pipe and nozzles. The spray pipe passes through the side wall of the filter slag bin and is placed between the upper and lower layers of the filter belt. The spray pipe is fixedly connected to the filter slag bin. Nozzles are arranged sequentially on the side wall of the part of the spray pipe placed inside the filter slag bin, and the nozzles are inclined downwards towards the lower layer of the filter belt.
[0009] Furthermore, the drive device includes a head sprocket, a tail sprocket, a drive sprocket, and a drive motor. The drive motor is fixedly installed on the outer wall of the liquid collection tank. The head sprocket is fixedly installed on the shaft of the head roller, and the tail sprocket is fixedly installed on the shaft of the tail roller. The head sprocket and the tail sprocket are connected by chain drive. A drive sprocket is also fixedly installed on the shaft of the head roller. The drive sprocket is connected to the output shaft of the drive motor by chain drive.
[0010] The advantages of this utility model are as follows: By separately providing high-calorific-value storage tanks and low-calorific-value storage tanks, waste liquids with different calorific values are sent into the rotary kiln and secondary combustion chamber respectively through waste liquid atomizing pumps. This solves the defects of unstable combustion of high-calorific-value waste liquid in the rotary kiln and waste of heat energy of high-calorific-value waste liquid. At the same time, the waste liquid separates solid particulate impurities through the collection tank. The waste liquid filtered by the belt filter device in the collection tank is less likely to clog the atomizing nozzles, reducing the maintenance frequency of the rotary kiln and secondary combustion chamber and reducing the failure rate. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the system of this utility model.
[0012] Figure 2 This is a schematic diagram of the collection tank.
[0013] Figure 3 This is an exploded view of the drive unit.
[0014] Figure 4 This is a partial structural diagram of the jetting device.
[0015] In the diagram: 1. Collection tank; 2. First transfer pump; 3. High calorific value storage tank; 4. Second transfer pump; 5. Low calorific value storage tank; 6. Waste liquid atomizing pump; 7. Continuous dryer; 101. Filtration tank; 102. Filter residue tank; 103. Belt filter device; 104. Pulsating device; 1021. Vertical section; 1022. Inclined section; 1023. Collection tank; 1024. Screen plate; 1025. Drainage pipe; 1031. Head roller; 1032. Tail roller; 1033. Filter belt; 1034. Drive device; 1035. Head sprocket; 1036. Tail sprocket; 1037. Drive sprocket; 1038. Drive motor; 1041. Spray pipe; 1042. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] like Figure 1The diagram shows a liquid hazardous waste pretreatment system comprising a collection tank 1, a first transfer pump 2, a high-calorific-value storage tank 3, a second transfer pump 4, a low-calorific-value storage tank 5, and a waste liquid atomizing pump 6. The system includes two collection tanks 1, two waste liquid atomizing pumps 6, and a continuous dryer 7. The bottom outlet of one collection tank 1 is connected to the inlet of the first transfer pump 2, and the outlet of the first transfer pump 2 is connected to the inlet of the high-calorific-value storage tank 3. The bottom outlet of the other collection tank 1 is connected to the inlet of the second transfer pump 4, and the outlet of the second transfer pump 4 is connected to the inlet of the low-calorific-value storage tank 5. The outlets of the high-calorific-value storage tank 3 and the low-calorific-value storage tank 5 are respectively connected to the inlets of the two waste liquid atomizing pumps 6. The slag outlet of the collection tank 1 is connected to the inlet of the continuous dryer 7 via a conveyor belt. The continuous dryer 7 is a disc dryer. Two collection tanks 1 receive high-calorific-value waste liquid and low-calorific-value waste liquid from the outside world, respectively. After filtering the waste liquid, the pure liquid without solid particles is sent to the high-calorific-value storage tank 3 and the low-calorific-value storage tank 5 for storage. During incineration, the low-calorific-value waste liquid is sent to the waste liquid atomizing pump 6 of the rotary kiln through pipeline for incineration and evaporation, while the high-calorific-value waste liquid is sent to the waste liquid atomizing pump 6 of the secondary combustion chamber for direct use as part of the fuel.
[0018] like Figure 2 As shown, the collection tank 1 includes a filtrate chamber 101, a filter cake chamber 102, a belt filter device 103, and a jet cleaning device 104. The filter cake chamber 102 is located on one side of the filtrate chamber 101. The filtrate chamber 101 has an opening at the top and an outlet at the bottom. The belt filter device 103 is placed inside the filtrate chamber 101 and the filter cake chamber 102. The solid particles separated by the belt filter device fall into the filter cake chamber 102. The belt filter device 103 includes a head roller 1031, a tail roller 1032, a filter belt 1033, and a drive device 1034. The head roller 1031 is installed inside the filtrate chamber 101, and the tail roller 1032 is installed in the filter cake chamber 102. Inside, a filter belt 1033 is wound around the head roller 1031 and the tail roller 1032. A drive device 1034 is fixedly installed on the filtrate chamber 101. The drive device 1034 is connected to the head roller 1031 and the tail roller 1032. The filter belt 1033 passes through the side wall adjacent to the filtrate chamber 101 and the filter cake chamber 102. A jet blowing device 104 is installed at the tail roller 1032 inside the filter cake chamber 102. The jet blowing device 104 is placed between the upper and lower layers of the filter belt 1033. The jet blowing device 104 is connected to a high-pressure air system. By spraying high-pressure air, the solid particles adhering to the filter belt 1033 are blown off and fall into the filter cake chamber 102.
[0019] The filter cake bin 102 includes a vertical section 1021, an inclined section 1022, and a collection bin 1023. The vertical section 1021 is connected to one side of the filtrate bin 101. The inclined section 1022 is located below the vertical section 1021, and the collection bin 1023 is connected to the bottom of the inclined section 1022. A sieve plate 1024 is inclined at the top of the collection bin 1023, at the point where the inclined section 1022 connects to the collection bin 1023. The end edge of the sieve plate 1024 is flush with the bottom of the inclined section 1022. A drain pipe 1025, connected to the filtrate bin 101, is located at the bottom of the collection bin 1023. The filter belt 1033 has a metal chain mesh structure. Tension between the liquid particles in the mesh causes some waste liquid to be adsorbed onto the filter belt 1033. During the cleaning process of the filter belt 1033 by the blowing device 104, some waste liquid is blown into the filter cake bin 102. like Figure 3 As shown: The drive device 1034 includes a head sprocket 1035, a tail sprocket 1036, a drive sprocket 1037, and a drive motor 1038. The drive motor 1038 is fixedly installed on the outer wall of the collection tank 1023. The head sprocket 1035 is fixedly installed on the shaft of the head roller 1031, and the tail sprocket 1036 is fixedly installed on the shaft of the tail roller 1032. The head sprocket 1035 and the tail sprocket 1036 are connected by a chain drive. The drive sprocket 1037 is also fixedly installed on the shaft of the head roller 1031. The drive sprocket 1037 is connected to the output shaft of the drive motor 1038 by a chain drive. During operation, the drive motor 1038 drives the head roller 1031 and the tail roller 1032 to rotate synchronously, which can prevent the filter belt 1033 from slipping.
[0020] like Figure 4 As shown: The jet cleaning device 104 includes a nozzle 1041 and nozzles 1042. The nozzle 1041 passes through the side wall of the filter cake bin 102 and is positioned between the upper and lower layers of the filter belt 1033. The nozzle 1041 is fixedly connected to the filter cake bin 102. Nozzles 1042 are arranged sequentially on the side wall of the portion of the nozzle 1041 within the filter cake bin 102, with the nozzles 1042 angled downwards towards the lower layer of the filter belt 1033. The nozzle 1041 is connected to a high-pressure air system via a pipe or to an air pump. High-pressure air is ejected from each nozzle 1042 to backflush and clean the filter belt 1033, blowing small solid particles adhering to the filter belt 1033 into the lower filter cake bin 102. This maintains the continuous filtration capacity of the filter belt 1033 and prevents clogging caused by prolonged filtration.
[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
Claims
1. A liquid hazardous waste pretreatment system, characterized in that, The system includes a collection tank (1), a first transfer pump (2), a high-calorific-value storage tank (3), a second transfer pump (4), a low-calorific-value storage tank (5), a waste liquid atomizing pump (6), and a continuous dryer (7). It is equipped with two collection tanks (1) and two waste liquid atomizing pumps (6). The bottom outlet of one collection tank (1) is connected to the inlet of the first transfer pump (2), and the outlet of the first transfer pump (2) is connected to the inlet of the high-calorific-value storage tank (3). The bottom outlet of the other collection tank (1) is connected to the inlet of the second transfer pump (4), and the outlet of the second transfer pump (4) is connected to the inlet of the low-calorific-value storage tank (5). The outlets of the high-calorific-value storage tank (3) and the low-calorific-value storage tank (5) are respectively connected to the inlets of the two waste liquid atomizing pumps (6). The slag outlet of the collection tank (1) is connected to the inlet of the continuous dryer (7) through a conveyor belt.
2. The liquid hazardous waste pretreatment system according to claim 1, characterized in that, The collection tank (1) includes a filtrate chamber (101), a filter residue chamber (102), a belt filter (103), and a jetting device (104). The filter residue chamber (102) is located on one side of the filtrate chamber (101). The filtrate chamber (101) has an opening at the top and an outlet at the bottom. The belt filter (103) is placed inside the filtrate chamber (101) and the filter residue chamber (102). The belt filter (103) includes a head roller (1031), a tail roller (1032), a filter belt (1033), and a drive device (1034). The head roller (1031) is installed inside the filtrate chamber (101). The tail roller (1032) is installed inside the filter cake bin (102). A filter belt (1033) is wound around the head roller (1031) and the tail roller (1032). A drive device (1034) is fixedly installed on the filtrate bin (101). The drive device (1034) is connected to the head roller (1031) and the tail roller (1032). The filter belt (1033) passes through the side wall adjacent to the filtrate bin (101) and the filter cake bin (102). A jetting device (104) is installed at the tail roller (1032) inside the filter cake bin (102). The jetting device (104) is placed between the upper and lower layers of the filter belt (1033).
3. The liquid hazardous waste pretreatment system according to claim 2, characterized in that, The filter residue bin (102) includes a vertical section (1021), an inclined section (1022), and a collection bin (1023). The vertical section (1021) is connected to one side of the filtrate bin (101). An inclined section (1022) is provided below the vertical section (1021). A collection bin (1023) is connected to the bottom of the inclined section (1022). A sieve plate (1024) is inclined at the top of the collection bin (1023) at the position where the inclined section (1022) and the collection bin (1023) are connected. The end edge of the sieve plate (1024) is flush with the bottom of the inclined section (1022). A drain pipe (1025) connected to the filtrate bin (101) is provided at the bottom of the collection bin (1023).
4. The liquid hazardous waste pretreatment system according to claim 3, characterized in that, The jetting device (104) includes a jet pipe (1041) and a nozzle (1042). The jet pipe (1041) passes through the side wall of the filter slag bin (102) and is placed between the upper and lower layers of the filter belt (1033). The jet pipe (1041) is fixedly connected to the filter slag bin (102). The nozzles (1042) are arranged sequentially on the side wall of the part of the jet pipe (1041) placed inside the filter slag bin (102). The nozzles (1042) are inclined downward toward the lower layer of the filter belt (1033).
5. A liquid hazardous waste pretreatment system according to claim 2, characterized in that, The drive device (1034) includes a head sprocket (1035), a tail sprocket (1036), a drive sprocket (1037), and a drive motor (1038). The drive motor (1038) is fixedly installed on the outer wall of the liquid collection tank (1023). The head sprocket (1035) is fixedly installed on the shaft of the head roller (1031). The tail sprocket (1036) is fixedly installed on the shaft of the tail roller (1032). The head sprocket (1035) and the tail sprocket (1036) are connected by chain drive. The drive sprocket (1037) is also fixedly installed on the shaft of the head roller (1031). The drive sprocket (1037) is connected to the output shaft of the drive motor (1038) by chain drive.