Wastewater recycling device in humic acid production

Abstract

The utility model relates to the technical field of humic acid production, in particular to a wastewater recycling device in humic acid production. The wastewater recycling device in the humic acid production comprises a reaction kettle and a premixing kettle, the premixing kettle is connected with the reaction kettle through a pipeline, a filtering conveying belt is arranged below the reaction kettle, a liquid collector is arranged below the filtering conveying belt and connected with an aerobic tank through a liquid collecting tank, the filtering conveying belt is connected with a solid-liquid separator through a material guide plate, and the solid-liquid separator is connected with an aerobic tank through a material guide plate. The lower part of the solid-liquid separator is connected with the aerobic tank through a pipeline, a filter cartridge is arranged in the solid-liquid separator, and the filter cartridge is connected with the drying box through a pipeline. Wastewater generated by the reaction kettle and the solid-liquid separator is collected and introduced into an aerobic tank for biological treatment. And the treated water can be circularly used in the production process, so that the resource utilization of the wastewater is realized, the consumption of fresh water resources is greatly reduced, the production cost of enterprises is reduced, and meanwhile, the pollution to the environment is alleviated.

Description

TECHNICAL FIELD

[0001] The utility model relates to humic acid production technical field, concretely is humic acid production in wastewater recycling device. BACKGROUND

[0002] In the humic acid production process, wastewater treatment has been an important problem faced by the industry. The existing humic acid production device has a low degree of utilization of wastewater, and a large amount of wastewater is directly discharged without sufficient treatment and effective recovery, which not only causes waste of water resources, but also increases the production cost of enterprises, and also has a great pressure on the environment.

[0003] In addition, as a key link of wastewater biological treatment, the treatment effect of the aerobic tank is significantly affected by temperature. Aerobic bacteria have high activity in a suitable temperature range, and can efficiently decompose organic pollutants in wastewater. However, the existing aerobic tank has obvious defects in dealing with environmental temperature changes, especially in winter low temperature environment, the water temperature in the aerobic tank decreases greatly, the activity of aerobic bacteria is inhibited, which leads to the reduction of wastewater treatment efficiency and the difficulty of meeting the standard of effluent quality. In order to maintain the treatment effect of the aerobic tank, enterprises often need to invest additional energy for heating, which further increases the operating cost. SUMMARY

[0004] According to the above deficiencies in the prior art, the purpose of the utility model is to provide a wastewater recycling device in humic acid production, which collects the wastewater generated by the reaction kettle and the solid-liquid separator and introduces it into the aerobic tank for biological treatment. The treated water can be recycled for production process, realizing the resource utilization of wastewater, greatly reducing the consumption of fresh water resources, reducing the production cost of enterprises, and reducing the pollution to the environment.

[0005] The utility model is implemented by adopting the following technical solutions:

[0006] The wastewater recycling device in humic acid production includes a reaction kettle and a premix kettle, the premix kettle is connected to the reaction kettle through a pipeline, a filter conveyor belt is arranged below the reaction kettle, a liquid collector is arranged below the filter conveyor belt, the liquid collector is connected to the aerobic tank through a liquid collecting tank, the filter conveyor belt is connected to the solid-liquid separator through a guide plate, the lower part of the solid-liquid separator is connected to the aerobic tank through a pipeline, a filter cartridge is arranged in the solid-liquid separator, and the filter cartridge is connected to a drying box through a pipeline. A reaction kettle temperature control sleeve is arranged on the outside of the reaction kettle, which can accurately control the reaction temperature. The effect is to ensure that the humic acid production reaction is carried out under suitable temperature conditions, improve the reaction rate and product quality, and avoid incomplete reaction or side reaction caused by temperature fluctuation.

[0007] The outside of the reaction kettle is provided with a reaction kettle temperature control jacket, a steam inlet pipeline is connected to the reaction kettle temperature control jacket, and a spraying disc is arranged in the inside of the premixing kettle.

[0008] The aerobic tank is connected with a liquid preparation tank through a pipeline, the inside of the aerobic tank is provided with an aeration plate, the aeration plate is connected with a blower, and the bottom of the aerobic tank is provided with a tank bottom coil pipe.

[0009] The drying box is connected with a hot air inlet pipeline, and the hot air inlet pipeline is connected with the heat exchanger through a pipeline.

[0010] The inside of the heat exchanger is provided with a heat exchange coil pipe, the heat exchange coil pipe is connected with a hot air outlet of the drying box, and the heat exchanger is connected with the tank bottom coil pipe through a connecting pipeline.

[0011] The reverse filter is arranged between the solid-liquid separator and the aerobic tank, the inside of the reverse filter is provided with a filter plate, the lower portion of the filter plate is provided with a rotary scraper, the connection between the solid-liquid separator and the reverse filter is located below the filter plate, and the connection between the aerobic tank and the reverse filter is located above the filter plate.

[0012] The inside of the reverse filter is provided with the filter plate and the rotary scraper. The filter plate performs secondary filtration on the wastewater entering the aerobic tank, the rotary scraper timely removes impurities on the filter plate, the filtration effect is ensured, and the impurities are prevented from entering the aerobic tank and affecting the growth of aerobic bacteria and the wastewater treatment effect.

[0013] The liquid collecting tank is connected with the liquid mixing tank through a pipeline, the reaction kettle temperature control jacket is connected with the liquid mixing tank through a pipeline, the inside of the liquid mixing tank is provided with a stirring device, and the liquid mixing tank is connected with the spraying disc through a pipeline.

[0014] The working principle of the utility model is as follows:

[0015] The raw materials required for the production of humic acid are put into the premixing kettle, the spraying disc is opened, and the raw materials are preliminarily mixed under the action of spraying. The spraying pressure of the spraying disc is controlled to be 0.2-0.3MPa, the spraying is uniform, and the mixing time is 15-20 minutes. The premixed raw materials are conveyed to the reaction kettle through a pipeline, the reaction kettle temperature control jacket is opened, the temperature in the reaction kettle is controlled to be 80-90 DEG C through the steam inlet pipeline, and the reaction time is 3-4 hours. In the reaction process, the pressure in the reaction kettle is closely monitored to ensure that the pressure is stable at 0.5-0.8MPa.

[0016] After the reaction is completed, the materials in the reactor are preliminarily separated by the filter conveyor belt at the bottom. The running speed of the filter conveyor belt is controlled at 0.5-1 m / min, so that the liquid can flow into the liquid collector below through the filter conveyor belt, and the liquid collected by the liquid collector is transported to the aerobic tank through the liquid tank. The solid on the filter conveyor belt enters the solid-liquid separator through the guide plate, and the filter cartridge inside the solid-liquid separator further separates the solid and the liquid. The separated liquid is also transported to the aerobic tank through the pipeline, and the solid is transported to the drying box through the pipeline.

[0017] An appropriate amount of aerobic bacteria is added into the aerobic tank, and the aeration plate is turned on. The air is blown into the tank through the air blower, and the aeration amount is controlled at 5-8 cubic meters of air per cubic meter of wastewater per hour. At the same time, the water temperature in the aerobic tank is maintained at 25-35 DEG C by using the heat exchange system of the tank bottom coil and the heat exchanger. The residence time of the wastewater in the aerobic tank is 8-10 hours.

[0018] The treated water is transported from the aerobic tank to the device through the pipeline and is used in various links of the production of humic acid. The solid material entering the drying box is dried by the hot air introduced through the hot air inlet pipeline, and the temperature of the hot air is controlled at 120-150 DEG C. The drying time is 2-3 hours. The dried material can be processed or stored. The hot air discharged from the drying box enters the heat exchanger through the heat exchange coil, and the heat exchange medium in the heat exchanger absorbs heat and is transported to the tank bottom coil through the connecting pipeline to heat the water in the aerobic tank, so that the heat is recycled.

[0019] Compared with the prior art, the device has the following beneficial effects:

[0020] (1) The device collects the wastewater generated by the reactor and the solid-liquid separator through the liquid collector, the liquid tank and a series of connecting pipelines, and introduces the wastewater into the aerobic tank for biological treatment. The treated water can be recycled for the production process, for example, by adjusting the liquid tank and then being introduced into the reactor or other links, so that the wastewater is resourcefully utilized, the consumption of fresh water resources is greatly reduced, the production cost of the enterprise is reduced, and the pollution to the environment is reduced.

[0021] (2) The tank bottom coil at the bottom of the aerobic tank is connected with the heat exchanger. The waste heat of the hot air discharged from the drying box is recovered by the heat exchanger, the heat is transferred to the medium in the tank bottom coil through the heat exchange coil, and then the water in the aerobic tank is heated. This design effectively solves the problem that the aerobic tank is greatly affected by the environmental temperature. Even in the low-temperature environment in winter, the water temperature in the aerobic tank can be maintained within the range suitable for the growth and metabolism of aerobic bacteria, the activity of the aerobic bacteria is ensured, the wastewater treatment effect is stabilized, the water quality standard reaching rate is improved, and the consumption of additional heating energy is reduced.

[0022] (3) The filter cartridge is arranged in the solid-liquid separator, so that the solid and the liquid can be effectively separated, the separated solid is transported to the drying box through the pipeline for drying treatment, and the material recycling is realized. Meanwhile, the reverse filter is arranged between the solid-liquid separator and the aerobic tank, the rotating scraper under the filter plate can clean the impurities on the filter plate in time, the filter effect of the reverse filter is ensured, the wastewater entering the aerobic tank is more pure, and the growth of the aerobic bacteria and the wastewater treatment are beneficial.

[0023] (4) The acid-containing waste liquid in the liquid collecting tank and the condensed water in the reaction kettle temperature control sleeve are mixed in the mixing tank and then are transported to the premix kettle. This design not only reduces the direct discharge of the acid-containing waste liquid and the condensed water, realizes the recycling of water resources and reduces the pollution to the environment, but also utilizes the waste heat of the mixed liquid to improve the premix temperature of the raw materials in the premix kettle. The higher premix temperature can accelerate the reaction rate among the raw materials, makes the reaction more sufficient, and further improves the production efficiency of the humic acid and the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of the wastewater recycling device in the humic acid production.

[0025] In the figure: 1, reaction kettle; 2, premix kettle; 3, filter conveying belt; 4, liquid collector; 5, solid-liquid separator; 6, filter cartridge; 7, liquid collecting tank; 8, reverse filter; 9, aerobic tank; 10, aeration plate; 11, liquid preparation tank; 12, air blower; 13, drying box; 14, heat exchanger; 15, heat exchange coil; 16, mixing tank; 17, spraying disc; 18, reaction kettle temperature control sleeve; 19, filter plate; 20, rotating scraper; 21, tank bottom coil; 22, connecting pipeline; 23, hot air inlet pipeline; 24, steam inlet pipeline. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme of the utility model more clearly, in the following, the utility model is further explained in detail in combination with the drawings.

[0027] Example 1

[0028] As Figure 1As shown, the humic acid production wastewater recycling device, including reaction kettle 1, premix kettle 2, premix kettle 2 through pipeline and reaction kettle 1 connected, reaction kettle 1 below is equipped with filter conveyor belt 3, filter conveyor belt 3 below is equipped with liquid collector 4, liquid collector 4 through liquid collecting tank 7 and aerobic tank 9 are connected, filter conveyor belt 3 through guide plate and solid-liquid separator 5 are connected, the lower part of solid-liquid separator 5 is connected with aerobic tank 9 through pipeline, the inside of solid-liquid separator 5 is equipped with filter cartridge 6, filter cartridge 6 is connected with drying box 13 through pipeline.Reaction kettle 1 outside is equipped with reaction kettle temperature control sleeve 18, reaction kettle temperature control sleeve 18 is connected with steam inlet pipeline 24, the inside of premix kettle 2 is equipped with spray tray 17.Aerobic tank 9 is connected with liquid preparation tank 11 through pipeline, the inside of aerobic tank 9 is equipped with aeration plate 10, aeration plate 10 is connected with air blower 12, the bottom of aerobic tank 9 is equipped with tank bottom coil pipe 21.Aeration plate 10 ensures the oxygen supply required by aerobic bacteria, and tank bottom coil pipe 21 is used for heating and maintaining water temperature.Drying box 13 is connected with hot air inlet pipeline 23, hot air inlet pipeline 23 is connected with heat exchanger 14 through pipeline.Heat exchanger 14 is equipped with heat exchange coil 15, heat exchange coil 15 is connected with hot air outlet on drying box 13, heat exchanger 14 is connected with tank bottom coil pipe 21 through connecting pipeline 22.Heat exchanger 14 is equipped with heat exchange coil 15, which is connected with tank bottom coil pipe through connecting pipeline.The waste heat of the hot air discharged from the drying box can be recovered, and the heat can be transferred to the water in the aerobic tank, realizing the recycling of energy and reducing production cost.Reverse filter 8 is arranged between solid-liquid separator 5 and aerobic tank 9, filter plate 19 is arranged in the inside of reverse filter 8, rotary scraper 20 is arranged below filter plate 19, the connection between solid-liquid separator 5 and reverse filter 8 is located below filter plate 19, and the connection between aerobic tank 9 and reverse filter 8 is located above filter plate 19.Liquid collecting tank 7 is connected with liquid mixing tank 16 through pipeline, reaction kettle temperature control sleeve 18 is connected with liquid mixing tank 16 through pipeline, liquid mixing tank 16 is equipped with stirring device, and liquid mixing tank 16 is connected with spray tray 17 through pipeline.

[0029] The humic acid production wastewater recycling device works, including the following steps:

[0030] (1) The raw materials needed for humic acid production are put into the premixing kettle 2, and the spray tray 17 is turned on to preliminarily mix the raw materials under the action of spraying. The premixed raw materials are transported to the reaction kettle 1 through the pipeline, the temperature control jacket 18 of the reaction kettle is turned on, and the temperature in the reaction kettle is controlled at 80-90℃ by steam entering the pipeline 24, and the reaction time is 3-4 hours.(2) After the reaction is completed, the materials in the reaction kettle 1 are preliminarily separated by the filter conveying belt 3 at the bottom. The running speed of the filter conveying belt 3 is controlled at 0.5-1 m / min, so that the liquid can flow into the liquid collector 4 below through the conveying belt, and the liquid collected by the liquid collector 4 is transported to the aerobic tank 9 through the liquid tank 7. The solid on the filter conveying belt enters the solid-liquid separator 5 through the guide plate, and the filter cartridge 6 inside the solid-liquid separator 5 further separates the solid and liquid, and the separated liquid is also transported to the aerobic tank 9 through the pipeline, and the solid is transported to the drying box 13 through the pipeline.(3) A proper amount of aerobic bacteria is added to the aerobic tank 9, the aeration plate 10 is turned on, and the air is blown into the tank through the air blower 12, and the aeration amount is controlled at 5-8 cubic meters of air per cubic meter of wastewater per hour. At the same time, the water temperature in the aerobic tank is maintained at 25-35℃ by using the heat exchange system of the tank bottom coil 21 and the heat exchanger 14. The residence time of the wastewater in the aerobic tank is 8-10 hours.(4) The solid material entering the drying box 13 is dried by the hot air introduced through the hot air inlet pipeline 23, the temperature of the hot air is controlled at 120-150℃, and the drying time is 2-3 hours. The dried material can be processed or stored. The hot air discharged from the drying box 13 enters the heat exchanger 14 through the heat exchange coil 15, the heat exchange medium in the heat exchanger 14 absorbs heat and is then transported to the tank bottom coil 21 through the connecting pipeline 22 to heat the water in the aerobic tank, realizing the recycling of heat.

Claims

1. A device for recycling wastewater in humic acid production, characterized by, The device comprises a reaction kettle (1), a premix kettle (2), the premix kettle (2) is connected with the reaction kettle (1) through a pipeline, a filter conveying belt (3) is arranged below the reaction kettle (1), a liquid collector (4) is arranged below the filter conveying belt (3), the liquid collector (4) is connected with an aerobic tank (9) through a liquid collecting tank (7), the filter conveying belt (3) is connected with a solid-liquid separator (5) through a guide plate, the solid-liquid separator (5) is connected with the aerobic tank (9) through a pipeline below the solid-liquid separator (5), a filter cylinder (6) is arranged in the solid-liquid separator (5), and the filter cylinder (6) is connected with a drying box (13) through a pipeline.

2. The humic acid production wastewater recycling device according to claim 1, characterized by, The outer side of the reaction kettle (1) is provided with a reaction kettle temperature control sleeve (18), the reaction kettle temperature control sleeve (18) is connected with a steam inlet pipeline (24), and the inside of the premix kettle (2) is provided with a spraying disc (17).

3. The device for recycling wastewater in humic acid production according to claim 1, characterized in that, The aerobic tank (9) is connected with a liquid preparation tank (11) through a pipeline, the inside of the aerobic tank (9) is provided with an aeration plate (10), the aeration plate (10) is connected with a blower (12), and the bottom of the aerobic tank (9) is provided with a tank bottom coil pipe (21).

4. The device for recycling wastewater in humic acid production according to claim 3, characterized in that, The drying box (13) is connected with a hot air inlet pipeline (23), and the hot air inlet pipeline (23) is connected with a heat exchanger (14) through a pipeline.

5. The humic acid production wastewater recycling device according to claim 4, characterized in that, The heat exchanger (14) is internally provided with a heat exchange coil (15), the heat exchange coil (15) is connected with a hot air outlet on the drying box (13), and the heat exchanger (14) is connected with the tank bottom coil pipe (21) through a connecting pipeline (22).

6. The humic acid production wastewater recycling device according to claim 1, characterized by, The solid-liquid separator (5) and the aerobic tank (9) are provided with a reverse filter (8) therebetween, the inside of the reverse filter (8) is provided with a filter plate (19), the lower side of the filter plate (19) is provided with a rotary scraper (20), the connection position of the solid-liquid separator (5) and the reverse filter (8) is located below the filter plate (19), and the connection position of the aerobic tank (9) and the reverse filter (8) is located above the filter plate (19).

7. The humic acid production wastewater recycling device according to claim 2, characterized by, The liquid collecting tank (7) is connected with a mixed liquid tank (16) through a pipeline, the reaction kettle temperature control sleeve (18) is connected with the mixed liquid tank (16) through a pipeline, the inside of the mixed liquid tank (16) is provided with a stirring device, and the mixed liquid tank (16) is connected with the spraying disc (17) through a pipeline.

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