Acid boiling wastewater secondary utilization device

Abstract

The utility model discloses a secondary utilization device for acid cooking wastewater, which belongs to the technical field of secondary utilization of acid cooking wastewater and comprises an acid cooking tank, a filter press, a filtering tank and a mixing tank which are communicated in sequence, an inclined tube sedimentation tank for pre-treating impurities of filter pressing liquid is arranged between the filter press and the filtering tank, and acid cooking waste gas treatment equipment for recycling acid cooking waste gas in the acid cooking tank and the inclined tube sedimentation tank through water absorption is also arranged between the filter press and the filtering tank and is communicated with the mixing tank; the mixing tank is connected with an acid storage tank for supplementing concentrated hydrochloric acid into the mixing tank; the hydrochloric acid pickling wastewater treatment device has the beneficial effects that the hydrochloric acid pickling wastewater is pretreated, the precipitation time can be shortened, the filtering pressure of the filtering tank is reduced, the filtering effect on the hydrochloric acid pickling wastewater is improved, hydrochloric acid cooking waste gas and waste gas are recycled for secondary utilization, the emission of the hydrochloric acid cooking waste gas and wastewater and the input of hydrochloric acid are reduced, and the environmental pollution is reduced. Production cost is reduced and resource utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to acid cooking wastewater secondary utilization technical field, more particularly to a kind of acid cooking wastewater secondary utilization device. BACKGROUND

[0002] Phthalocyanine blue is a kind of high-grade organic pigment, widely used in ink, paint, plastic, color paste and other industries. This product has good stability, bright color, good dispersibility and high tinting strength. The company uses calcination process to produce phthalocyanine blue, using phthalic anhydride, urea, cuprous chloride and other raw materials, ammonium molybdate as catalyst; through raw material reaction synthesis, crude product purification, grinding process, and through refining, pigmentization, filter pressing and drying process, phthalocyanine blue is produced. In the production process of phthalocyanine blue, hydrochloric acid needs to be added during acid cooking, which produces waste acid water. Large amount of waste acid water is discharged, which not only causes resource waste, but also causes environmental pollution.

[0003] The national utility model patent with patent number 201921491716.0 discloses a kind of acid cooking wastewater secondary utilization device, which solves the above problems well, but has the following shortcomings: 1, poor filtering precision; 2, using alkali liquor spray absorption method to treat hydrochloric acid pickling waste gas, waste the recyclable resource hydrochloric acid in hydrochloric acid pickling waste gas. After neutralization reaction with alkali liquor, hydrochloric acid loses the value of recycling and reuse, and can only be discharged in the end, causing serious resource waste.

[0004] In view of the above problems, the pickling industry urgently needs a processing method and device that can recycle and reuse hydrochloric acid pickling waste acid water and waste acid gas with low investment and operating cost. Not only can it solve the problem of hydrochloric acid pickling waste acid water and waste acid gas treatment and disposal from the environmental protection point of view, but also can bring real economic benefits to enterprises. UTILITY MODEL CONTENTS

[0005] To solve the above problems and overcome the shortcomings of the prior art, the utility model provides a kind of acid cooking wastewater secondary utilization device;

[0006] The first technical problem solved is poor filtering precision.

[0007] The second technical problem solved is that waste acid gas generated during acid cooking is discharged after treatment, hydrochloric acid loses the value of recycling and reuse, and causes serious resource waste.

[0008] The specific technical solution of the utility model to solve the above technical problems is: the acid cooking wastewater secondary utilization device comprises acid cooking tank, filter press, filter tank and mixing tank connected in sequence.

[0009] The filter press and the filter tank are provided with an inclined pipe sedimentation tank for pre-treating the filter press liquid impurities, the water inlet of the inclined pipe sedimentation tank is communicated with the water outlet of the filter press, and the water outlet of the inclined pipe sedimentation tank is communicated with the water inlet of the filter tank; the acid cooking waste gas treatment equipment for recycling the acid cooking waste gas in the acid cooking tank and the inclined pipe sedimentation tank by water absorption is further arranged, the acid cooking waste gas treatment equipment is communicated with the mixing tank, and the acid storage tank for supplementing the concentrated hydrochloric acid into the mixing tank is connected to the mixing tank.

[0010] Further, the inclined pipe sedimentation tank is provided with a water inlet communicated with the water outlet of the filter press and a water outlet communicated with the water inlet of the filter press, the inclined pipe sedimentation tank is provided with a sedimentation structure, a sludge storage tank is arranged at the bottom of the inclined pipe sedimentation tank below the sedimentation structure, and the sludge storage tank is provided with a sludge discharge port.

[0011] Further, the sedimentation structure is formed by welding and splicing a plurality of inclined pipe fillers, and the welded and spliced inclined pipe is in the shape of a hexagonal honeycomb.

[0012] Further, the filter tank is filled with a filter layer, the inner wall of the filter tank is provided with a water inlet above the filter layer, the water inlet of the filter tank is communicated with the water outlet of the inclined pipe sedimentation tank through a liquid outlet pipe, the inner wall of the filter tank is provided with a water outlet below the filter layer, and the water outlet of the filter tank is communicated with the mixing tank.

[0013] Further, the acid cooking waste gas treatment equipment comprises a spray tower for spraying and absorbing the hydrochloric acid pickling waste gas, the acid gas collecting pipe and the acid gas collecting cover are arranged in the acid cooking tank and the inclined pipe sedimentation tank, one end of the acid gas collecting pipe is communicated with the acid gas collecting cover, the other end is communicated with the gas inlet at the bottom of the spray tower, the acid gas collecting pipe is provided with an air extractor, the spray tower is provided with a nozzle for spraying the hydrochloric acid pickling waste gas, and the spray tower is communicated with the mixing tank through a liquid outlet pipe.

[0014] Further, the mixing tank is provided with a stirring device for stirring and mixing the hydrochloric acid solution in the mixing tank, the stirring device comprises a stirring paddle and a driving motor, the stirring end of the stirring paddle is arranged in the mixing tank, the other end is keyed connected with the driving end of the driving motor, and the driving motor is fixed to the top wall of the mixing tank.

[0015] Further, the water outlet of the mixing tank is communicated with a liquid storage tank.

[0016] The beneficial effects of the present application are as follows:

[0017] One advantage of the present application is that the inclined pipe sedimentation tank is arranged between the filter press and the filter tank, the inclined pipe filler is welded and spliced to form a sedimentation structure in the inclined pipe sedimentation tank, the hydrochloric acid pickling waste water is pre-treated by using the laminar flow principle, the sedimentation time is shortened, the filtration pressure of the filter tank is reduced, and the filtration effect of the hydrochloric acid pickling waste water is improved.

[0018] One advantage of the utility model lies in being provided with acid cooking waste gas treatment equipment which recycles acid cooking waste gas in acid cooking tank and inclined pipe sediment tank through water absorption, acid cooking waste gas treatment equipment communicates with mixing tank, recycles and secondarily utilize hydrochloric acid cooking waste gas generated in acid cooking tank and inclined pipe sediment tank, reduces emission of hydrochloric acid cooking waste gas and input of hydrochloric acid, reduces production cost, improves resource utilization. BRIEF DESCRIPTION OF DRAWINGS

[0019] Attached Figure 1 It is the utility model structural schematic diagram, in the drawing:

[0020] 1. acid cooking tank;2. mixing tank;21. stirring paddle;22. drive motor;3. acid storage tank;4. inclined pipe sediment tank;41. sediment structure;42. sludge storage tank;43. sludge discharge port;5. filter tank;51. filter layer;6. spray tower;61. acid gas collection pipe;62. acid gas collection cover;63. nozzle;7. liquid storage tank;8. filter press. DETAILED DESCRIPTION

[0021] In the description of the utility model, it is understood that the terms "center", "upper", "lower", "left", "right", "back", "lower left", "upper right", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the scope of protection of the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] The specific embodiment of the utility model: the acid cooking waste water secondary utilization device, acid cooking tank 1, filter press 8, filter tank 5 and mixing tank 2 are sequentially communicated, the sidewall of the acid cooking tank 1 is provided with water inlet and water outlet;The water outlet of the acid cooking tank 1 is communicated with the filter press 8 through the liquid outlet pipe, the filter press 8 and the filter tank 5 are provided with the inclined pipe sediment tank 4 for pretreating the hydrochloric acid pickling waste water impurities, the sidewall of the inclined pipe sediment tank 4 is provided with water inlet and water outlet, the water inlet of the inclined pipe sediment tank 4 is communicated with the water outlet of the filter press 8, and the water outlet is communicated with the water inlet of the filter tank 5;The inclined pipe sediment tank 4 is provided with a sediment structure 41, the sediment structure 41 is made of a plurality of inclined pipes, the shape of the inclined pipe is hexagonal honeycomb, and the inclined pipe sediment can accelerate the sedimentation time and improve the efficiency.

[0023] The water outlet of the inclined tube sedimentation tank 4 is located above the sedimentation structure 41, the water outlet of the inclined tube sedimentation tank 4 is communicated with the filter tank 5 through a liquid outlet pipe, and is used for filtering the hydrochloric acid pickling wastewater again after sedimentation; a funnel-shaped sludge storage tank 42 is arranged in the inclined tube sedimentation tank 4 below the sedimentation structure 41, a sludge discharge port 43 is arranged at the bottom of the sludge storage tank 42, the sludge discharge port 43 is connected with a sludge discharge pipe, a sludge discharge valve is arranged on the sludge discharge pipe, and the sludge discharge valve is used for discharging the impurities precipitated in the hydrochloric acid pickling wastewater for reprocessing.

[0024] The filter tank 5 is filled with a filter layer 51, the filter layer 51 can be activated carbon or quartz stone, is used for adsorbing fine substances in the hydrochloric acid pickling wastewater, prevents the hydrochloric acid pickling wastewater after sedimentation from still containing fine impurities, and influences subsequent use; a water inlet is arranged on the inner wall of the filter tank 5 above the filter layer 51, the water inlet of the filter tank 5 is communicated with the water outlet of the inclined tube sedimentation tank 4 through a liquid outlet pipe; a water outlet is arranged on the inner wall of the filter tank 5 below the filter layer 51, and the water outlet of the filter tank 5 is communicated with the mixing tank 2 through a water pump;

[0025] As a preferred embodiment of the utility model, acid cooking waste gas treatment equipment for recycling the acid cooking waste gas in the acid cooking tank 1 and the inclined tube sedimentation tank 4 by water absorption is also arranged, the acid cooking waste gas treatment equipment is communicated with the mixing tank 2, the acid cooking waste gas treatment equipment includes a spray tower 6 for spraying and adsorbing the hydrochloric acid pickling waste gas, acid gas collecting pipes 61 and acid gas collecting covers 62 are arranged in the acid cooking tank 1 and the inclined tube sedimentation tank 4, one end of the acid gas collecting pipe 61 is communicated with the acid gas collecting cover 62, the other end is communicated with the gas inlet at the bottom of the spray tower 6, the acid cooking waste gas is inhaled from the bottom of the spray tower 6, and the contact time of the hydrochloric acid pickling waste gas and the spraying water can be increased; an air extractor is arranged on the acid gas collecting pipe 61, and a one-way valve is arranged at the gas inlet of the spray tower 6 and the acid gas collecting pipe 61 in the inclined tube sedimentation tank 4; the spray tower 6 is equipped with a nozzle 63 for spraying the hydrochloric acid pickling waste gas, the nozzle 63 is connected with a water tank through a spraying pipe; the spray tower 6 is communicated with the mixing pipe through a liquid outlet pipe.

[0026] The spray tower 6 can be arranged in plurality, the top wall of the spray tower 6 is provided with a gas outlet hole, the gas outlet hole is communicated with the next spray tower 6 through a gas guide pipe; the hydrochloric acid pickling waste gas is sprayed and adsorbed in sequence, so that the hydrochloric acid pickling waste gas treatment is completed.

[0027] The mixing tank 2 is connected with an acid storage tank 3 for supplementing concentrated hydrochloric acid into the mixing tank 2 through a metering pump; a stirring device is arranged in the mixing tank 2 to stir and mix the hydrochloric acid solution in the mixing tank 2, the stirring device comprises a stirring paddle 21 and a driving motor 22, a stirring end of the stirring paddle 21 is arranged in the mixing tank 2, and the other end is key-connected with a driving end of the driving motor 22, and the driving motor 22 is fixed to the top wall of the mixing tank 2; as preferred, an acidimeter can also be arranged in the mixing tank 2 to detect the PH value inside the mixing tank 2; and a water outlet of the mixing tank 2 is communicated with a liquid storage tank 7 through a water pump for storing the mixed hydrochloric acid solution.

[0028] It should be noted that the utility model is a kind of acid cooking wastewater secondary utilization device, when working specifically,

[0029] In the production process of phthalocyanine blue, hydrochloric acid needs to be added during acid cooking, in order to fully utilize the hydrochloric acid pickling wastewater and waste gas after acid cooking, reduce the discharge amount of hydrochloric acid pickling wastewater and waste gas and the input amount of hydrochloric acid;

[0030] After acid cooking tank 1 is reacted, the reaction liquid is discharged into filter press 8, after being filtered, the hydrochloric acid pickling wastewater is pumped into inclined pipe sedimentation tank 4 by water pump, the hydrochloric acid pickling wastewater passes through sedimentation structure 41, and the impurities in the hydrochloric acid pickling wastewater are deposited in sludge storage tank 42, the impurities deposited in the hydrochloric acid pickling wastewater are discharged by manually controlling to be discharged through sludge discharge port 43 periodically, and are treated again; the supernatant of the hydrochloric acid pickling wastewater is overflowed from the water outlet of inclined pipe sedimentation tank 4 to filter tank 5, under the action of gravity of the hydrochloric acid pickling wastewater itself and the pumping force of the water pump, the hydrochloric acid pickling wastewater passes through filter layer 51 for adsorbing fine substances in the hydrochloric acid pickling wastewater; the filtered hydrochloric acid pickling wastewater in filter tank 5 is pumped into mixing tank 2 to be mixed with concentrated hydrochloric acid, so that the hydrochloric acid pickling wastewater is recycled, the discharge of the hydrochloric acid pickling wastewater is reduced, the resource utilization efficiency is increased, and the production cost is reduced;

[0031] Meanwhile, the fan pumps the hydrochloric acid cooking waste gas generated in acid cooking tank 1 and inclined pipe sedimentation tank 4 into spray tower 6 through acid gas collecting cover 62 and acid gas collecting pipe 61 to be sprayed and adsorbed, the HCL is easily dissolved in water, the hydrochloric acid cooking waste gas is sprayed and absorbed, the obtained hydrogen chloride aqueous solution is pumped into mixing tank 2 to be mixed with concentrated hydrochloric acid, so that the hydrochloric acid pickling waste gas is recycled, the discharge of the hydrochloric acid pickling waste gas is reduced, the resource utilization efficiency is increased, and the environment is prevented from being polluted by the discharge of the hydrochloric acid pickling waste gas;

[0032] The mixed tank 2 draws high-concentration hydrochloric acid from the acid storage tank by a metering pump in a certain proportion, and a driving motor 22 is started to drive the stirring paddle 21 to stir the hydrochloric acid in the mixed tank 2, the acidity is manually observed, and when the hydrochloric acid concentration reaches the pickling requirement required by the reaction, the hydrochloric acid is sent to the liquid storage tank 7 for storage, ready for use in the next acid boiling reaction or other processes, so as to complete the secondary recycling of the hydrochloric acid pickling wastewater and waste liquid.

[0033] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An acid cooking wastewater secondary utilization device, comprising acid cooking tank (1), filter press (8), filter tank (5) and mixing tank (2) connected in sequence; characterized in that: a slanted pipe sedimentation tank (4) for pretreating the impurities in the filter press liquid is arranged between the filter press (8) and the filter tank, the water inlet of the slanted pipe sedimentation tank (4) is communicated with the water outlet of the filter press (8), and the water outlet is communicated with the water inlet of the filter tank; an acid cooking waste gas treatment equipment for recycling the acid cooking waste gas in the acid cooking tank (1) and the slanted pipe sedimentation tank (4) through water absorption is further arranged, the acid cooking waste gas treatment equipment is communicated with the mixing tank, and the acid storage tank (3) for supplementing concentrated hydrochloric acid into the mixing tank (2) is connected to the mixing tank (2). The slanted pipe sedimentation tank (4) is provided with a water inlet communicated with the water outlet of the filter press (8) and a water outlet communicated with the water inlet of the filter press (8) on the side wall, a sedimentation structure (41) is arranged in the slanted pipe sedimentation tank (4), a sludge storage tank (42) is arranged at the bottom of the slanted pipe sedimentation tank (4) below the sedimentation structure (41), and the sludge storage tank (42) is provided with a sludge discharge port (43).

2. The acid cooking wastewater secondary utilization device according to claim 1, characterized in that The sedimentation structure (41) is made by welding and splicing a plurality of slanted pipes, and the shape of the slanted pipe is hexagonal honeycomb.

3. The acid cooking wastewater secondary utilization device according to claim 2, characterized in that The filter tank (5) is filled with a filter layer (51), the inner wall of the filter tank (5) is provided with a water inlet above the filter layer (51), the water inlet of the filter tank (5) is communicated with the water outlet of the slanted pipe sedimentation tank (4) through a liquid outlet pipe, the inner wall of the filter tank (5) is provided with a water outlet below the filter layer (51), and the water outlet of the filter tank (5) is communicated with the mixing tank (2).

4. The acid cooking wastewater secondary utilization device according to claim 1, characterized in that The acid cooking waste gas treatment equipment comprises a spray tower (6) for spraying and adsorbing the hydrochloric acid pickling waste gas, the acid gas collecting pipe (61) and the acid gas collecting cover (62) are arranged in the acid cooking tank (1) and the slanted pipe sedimentation tank (4), one end of the acid gas collecting pipe (61) is communicated with the acid gas collecting cover (62), the other end is communicated with the gas inlet at the bottom of the spray tower (6), the acid gas collecting pipe (61) is provided with an air extractor, the spray tower (6) is provided with a nozzle (63) for spraying the hydrochloric acid pickling waste gas, and the spray tower (6) is communicated with the mixing tank (2) through a liquid outlet pipe.

5. The acid cooking wastewater secondary utilization device according to claim 1, characterized in that A stirring device for stirring and mixing the hydrochloric acid solution in the mixing tank (2) is arranged in the mixing tank (2), the stirring device comprises a stirring paddle (21) and a driving motor (22), the stirring end of the stirring paddle (21) is arranged in the mixing tank (2), the other end is keyed connected with the driving end of the driving motor (22), and the driving motor (22) is fixed on the top wall of the mixing tank (2).

6. The acid cooking wastewater secondary utilization device according to claim 1, characterized in that The water outlet of the mixing tank (2) is communicated with the liquid storage tank (7).

7. The acid cooking wastewater secondary utilization device according to claim 6, characterized in that ​

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