CN219009965U - Ammonia nitrogen stripping absorption system - Google Patents

Abstract

The utility model relates to the technical field of ammonia nitrogen wastewater treatment equipment, and discloses an ammonia nitrogen blow-off absorption system, comprising a blow-off tower, an absorption tower, and a defogging tower, and a circulation pipeline in which the blow-off tower, the absorption tower, and the defogging tower are connected in series , and fan; by setting stripping tower, absorption tower and defogging tower, the ammonia molecules in the ammonia nitrogen wastewater are first stripped in the stripping tower, and then fully react with sulfuric acid in the absorption tower to produce ammonium sulfate and crystallize Recycling, blowing off effect is good. The fan is connected in series between the stripping tower and the defogging tower through the circulation pipeline, and the circulation pipeline is used for circulation, which has good sealing performance, improves safety performance and environmental protection. The blowing off tower is equipped with a blowing off air inlet and a blowing off air outlet, and the blowing off air outlet is set on the top of the blowing off tower, and the first blowing off packing layer and the first blowing off spraying device are arranged in sequence between the blowing off air inlet and the blowing off air outlet , the second blow-off packing layer, the second blow-off spraying device, the blow-off demister layer, and the blow-off tower top packing layer for purification treatment.

Description

A kind of ammonia nitrogen stripping absorption system

technical field

The utility model relates to the technical field of ammonia nitrogen wastewater treatment equipment, in particular to an ammonia nitrogen blow-off absorption system.

Background technique

Ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. A large amount of ammonia nitrogen wastewater discharges into water bodies not only causes eutrophication of water bodies, causes water body black and smelly, but also increases the difficulty and cost of water supply treatment, and even affects People and organisms produce toxic effects, and the treatment methods for ammonia nitrogen wastewater include biological methods, physical and chemical methods, etc.

The basic principle of the stripping method is to use the volatile characteristics of ammonia nitrogen, adopt the method that there is a difference between the actual concentration of ammonia nitrogen in the solution and the equilibrium concentration under certain conditions, and use air to strip under alkaline conditions. Since the concentration of ammonia in the gas phase environment outside the wastewater is always less than the equilibrium concentration in the gas phase of the stripped water, the ionic ammonium is converted into molecular ammonia, and the pH of the wastewater is adjusted to alkaline. After the air is introduced, the dissolved gas and volatile solutes in the wastewater Continuously pass through the gas-liquid interface and enter the gas phase, so that the ammonia in the wastewater can be removed. However, the current single-stage stripping or double stripping cycle has the problem of poor ammonia nitrogen removal effect and long stripping time.

Utility model content

The technical problem solved by the utility model is to provide an ammonia nitrogen blow-off absorption system with high blow-off efficiency and good treatment effect.

The technical solution adopted by the utility model to solve the technical problem is: an ammonia nitrogen blow-off absorption system, including a blow-off tower, an absorption tower, and a defogging tower, and a circulation pipe that connects the blow-off tower, the absorption tower, and the defogging tower in series road, and fan; the fan is connected in series between the blowing tower and the defogging tower through a circulation pipeline; the blowing tower is provided with a blowing air inlet and a blowing air outlet, and the blowing air outlet is located at the top of the blowing tower , the blow-off air inlet is arranged on the side of the blow-off tower near the bottom position, the first blow-off packing layer, the first blow-off spray device, the second Blow off the packing layer, the second blow off spraying device, blow off the mist removal layer, blow off the tower top packing layer; it also includes a water tank for containing ammonia nitrogen waste water, a blow off spray pump installed on the water tank, and blow off Ammonia nitrogen wastewater pipeline connected to the outlet of the dehydration pump and the first blow-off spray device and the second blow-off spray device.

Further, the absorption tower is provided with an absorption air inlet and an absorption air outlet, and the absorption air inlet communicates with the blowing air outlet through a circulation pipeline; the absorption air inlet and the absorption air outlet of the absorption tower are successively provided with absorption The first packing layer, absorbing first spraying device, absorbing second packing layer, absorbing second spraying device, absorbing demister layer, absorbing tower top packing layer; The absorption spray pump on the tank is the sulfuric acid pipeline connecting the liquid outlet of the absorption spray pump with the first absorption spray device and the second absorption spray device.

Further, the defogging tower is provided with a defogging air outlet and a defogging air inlet, a buffer defogging layer is provided between the defogging air inlet and the defogging air outlet of the defogging tower, and a tower Top defogging layer.

Further, the stripping tower, the absorption tower, and the demisting tower are respectively provided with a plurality of windows.

Further, the water tank is provided with a water inlet and an overflow.

Further, the sulfuric acid tank is provided with an absorption pH sensor for monitoring the pH value of the circulating fluid.

Further, the sulfuric acid tank is provided with a liquid inlet and an overflow.

Further, the sulfuric acid tank is also provided with a liquid level gauge for viewing the amount of sulfuric acid.

The beneficial effects of the utility model are: by setting the stripping tower, the absorption tower and the defogging tower, the ammonia molecules in the ammonia nitrogen wastewater are blown off in the stripping tower first, and then fully react with sulfuric acid in the absorption tower to produce sulfuric acid After the ammonium is crystallized and recovered, the stripping effect is good; the circulation pipeline is used for circulation, and the gas will not leak during work, which improves the safety performance and environmental protection. The demisting tower is used to collect large droplets in the gas to improve the purification effect.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the utility model;

Fig. 2 is the utility model stripping tower structural representation;

Fig. 3 is the utility model absorption tower structural representation;

Fig. 4 is a structural schematic diagram of the utility model defogging tower;

The marks in the figure are: 11. Blow off tower; 112. Blow off spray pump; 121. Blow off air inlet; 122. Blow off air outlet; 131. First blow off packing layer; 132. First blow off spray device ; 133, the second blow-off packing layer; 134, the second blow-off spray device; 135, blow-off demist layer; 141, water inlet; 142, overflow port; 21, absorption tower; 212, absorption spray pump ; 213, absorption PH induction meter; 221, absorption air inlet; 222, absorption air outlet; 231, absorption first packing layer; 232, absorption first spray device; 233, absorption second packing layer; 234, absorption second Spraying device; 235, absorbing defogging layer; 31, defogging tower; 321, defogging air inlet; 322, defogging air outlet; 331, buffer defogging layer; 332, tower top defogging layer; 41, fan; 42. Circulation pipeline.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

A kind of ammonia nitrogen blow-off absorption system as shown in Figure 1 to Figure 4, comprises blow-off tower 11, absorption tower 21, defogging tower 31, and blow-off tower 11, absorbing tower 21, defogging tower 31 are carried out the cycle in series Pipeline 42, and fan 41; Fan 41 is connected in series between blowing tower 11 and defogging tower 31 through circulation pipeline 42; It communicates with the blow-off air inlet 121 , and the blow-off air outlet 122 communicates with the absorption tower 21 . The blowing off air outlet 122 is arranged at the top of the blowing off tower 11, the blowing off air inlet 121 is arranged on the side of the blowing off tower 11 near the bottom position, and the first blowing off packing layer is arranged successively between the blowing off air inlet 121 and the blowing off air outlet 122 131. The first blow-off spraying device 132, the second blow-off packing layer 133, the second blow-off spray device 134, the blow-off demister layer 135, the blow-off tower 11 top packing layer; the first blow-off packing layer The filler in the middle layer adopts Raschig ring or polypropylene multi-faceted hollow sphere, and a supporting grid is set under the filler to support the filler; the filler in the second layer of blow-off filler layer adopts wire mesh filler or plastic rosette. Also comprise the water tank that is used to hold ammonia nitrogen waste water, the blow-off spray pump 112 that is installed on the water tank, the liquid outlet of the blow-off water pump is connected with the first blow-off spray device 132, the second blow-off spray device 134 Ammonia nitrogen wastewater pipeline. During work, the water tank contains ammonia nitrogen wastewater to be treated, and liquid caustic soda is added to the ammonia nitrogen wastewater, and the pH value is detected by a pH sensor. In the first-layer blow-off spray device and the second-layer blow-off spray device, the ammonia nitrogen wastewater is sprayed downward through the spray head; the fan 41 works, and the gas is input from the blow-off air inlet 121, and the gas is blown from the bottom to the blow-off air outlet 122 movement, during the upward movement, the gas-liquid fully contacts with the ammonia nitrogen wastewater sprayed from the sprinkler, the ionic ammonia is converted into molecular ammonia, the pH of the wastewater is adjusted to alkaline, and the dissolved gas and volatile solutes are continuously Pass through the gas-liquid interface and enter the gas phase, so that the ammonia in the ammonia nitrogen wastewater can be released.

On the basis of the above, as shown in Figures 1 and 3, the absorption tower 21 is provided with an absorption air inlet 221 and an absorption air outlet 222, and the absorption air inlet 221 is communicated with the blowing air outlet 122 through the circulation pipeline 42; the absorption of the absorption tower 21 The first absorption packing layer 231, the first absorption spraying device 232, the second absorption packing layer 233, the second absorption spraying device 234, the absorption defogging layer 235, and the absorption tower are sequentially arranged between the air inlet 221 and the absorption air outlet 222. 21 top packing layer; also includes a sulfuric acid tank for containing sulfuric acid, an absorption spray pump 212 installed on the sulfuric acid tank, connect the liquid outlet of the absorption spray pump 212 with the first absorption spray device, the second absorption spray Sulfuric acid pipeline connected to the device. The absorption spray pump 212 transmits the sulfuric acid to the absorption first spray device 232 and the absorption second spray device 234, and the sulfuric acid and ammonia molecules are fully absorbed in the filler by the spray head in the spray device to form ammonium sulfate, Crystallization is recovered.

On the basis of the above, as shown in Figure 1 and Figure 4, the defogging tower 31 is provided with a defogging air outlet 322 and a defogging air inlet 321, and the defogging air inlet 321 and the defogging air outlet 322 of the defogging tower 31 are provided with There is a buffer defogging layer 331 and a tower top defogging layer 332 on the top of the tower. The buffer defogging layer 331 and the tower top defogging layer 332 can filter the large liquid droplets in the gas, collect them at the bottom of the defogging tower 31 for recovery, and discharge them out of the tower through the discharge pipe.

On the basis of the above, as shown in Figures 1 to 4, in order to facilitate the observation of the situation inside the tower body, a plurality of windows are respectively provided in the stripping tower 11, the absorption tower 21, and the defogging tower 31,

On the basis of the above, as shown in Figure 1 and Figure 2, a water inlet 141 and an overflow port 142 are provided in the water tank, and the water inlet 141 facilitates the input of lye to adjust the pH value of the ammonia nitrogen wastewater, when the amount of lye and ammonia nitrogen wastewater When it reaches the overflow port 142, it is discharged from the overflow port 142.

Based on the above, as shown in FIG. 3 , an absorption pH sensor 213 for monitoring the pH value of the circulating fluid is provided in the sulfuric acid tank. And the sulfuric acid tank is provided with a liquid inlet and an overflow port 142, and sulfuric acid is added.

On the basis of the above, in order to facilitate the observation of the capacity of sulfuric acid in the sulfuric acid tank, a liquid level gauge for viewing the amount of sulfuric acid is provided.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (8)

1. A ammonia nitrogen blow-off absorption system is characterized in that: comprise blow-off tower, absorption tower, defogging tower, carry out the circulating pipeline that blows off tower, absorption tower, defogging tower in series, and blower fan; Said blower blower It is connected in series between the blow-off tower and the defogging tower through a circulation pipeline; the blow-off tower is provided with a blow-off air inlet and a blow-off air outlet. On the side of the blow-off tower near the bottom, between the blow-off air inlet and the blow-off air outlet, a first blow-off packing layer, a first blow-off spray device, a second blow-off packing layer, a second blow-off packing layer, and a second blow-off packing layer are sequentially arranged. Despraying device, blowing off demisting layer, blowing off tower top packing layer; also includes a water tank for containing ammonia nitrogen wastewater, a blowing off spray pump installed on the water tank, connecting the outlet of the blowing off water pump to the first The ammonia nitrogen wastewater pipeline connected to the blow-off spray device and the second blow-off spray device. 2. A kind of ammonia nitrogen blowing off absorption system as claimed in claim 1, is characterized in that: described absorption tower is provided with absorption air inlet, absorbs air outlet, and described absorption air inlet communicates with blowing off air outlet through circulation pipeline; Between the absorption air inlet and the absorption air outlet of the absorption tower, an absorption first packing layer, an absorption first spraying device, an absorption second packing layer, an absorption second spraying device, an absorption defogging layer, and an absorption tower top The packing layer also includes a sulfuric acid tank for containing sulfuric acid, an absorption spray pump installed on the sulfuric acid tank, and a sulfuric acid pipeline connecting the liquid outlet of the absorption water pump with the first absorption spray device and the second absorption spray device. 3. A kind of ammonia nitrogen blowing off absorption system as claimed in claim 2, it is characterized in that: described defogging tower is provided with defogging air outlet, defogging air inlet, and the defogging air inlet of described defogging tower is connected with defogging air inlet. There is a buffer defogging layer between the fog outlets, and a tower top defogging layer on the top of the tower. 4. An ammonia nitrogen stripping and absorbing system as claimed in claim 1, characterized in that: the stripping tower, the absorbing tower, and the demisting tower are respectively provided with a plurality of windows. 5. The ammonia nitrogen stripping and absorbing system according to claim 1, characterized in that: the water tank is provided with a water inlet and an overflow. 6. The ammonia nitrogen stripping absorption system according to claim 2, characterized in that: the sulfuric acid tank is provided with an absorption pH sensor for monitoring the pH value of the circulating fluid. 7. The ammonia nitrogen stripping and absorbing system according to claim 6, characterized in that: the sulfuric acid tank is provided with a liquid inlet and an overflow. 8. A system for stripping and absorbing ammonia nitrogen as claimed in claim 7, characterized in that: said sulfuric acid tank is also provided with a liquid level gauge for viewing the amount of sulfuric acid.

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