CN213680185U - Integrated gas water seal wastewater treatment device - Google Patents

Abstract

The utility model discloses an integrated gas water seal wastewater treatment device, which comprises a wastewater collection pool, wherein a raw water lift pump I, a chlorination reaction assembly, a raw water lift pump II, a pressure filter, a multi-medium filtering device and an active carbon adsorption device are sequentially arranged behind the wastewater collection pool; the utility model discloses can effectual reduction because of the required unnecessary time of biochemical debugging, reduce the processing cost simultaneously, the effectual equipment availability factor that has improved.

Description

Integrated gas water seal wastewater treatment device

Technical Field

The utility model relates to an integrated form coal gas water seal effluent treatment plant belongs to coal gas water seal waste water instrument field.

Background

In the wet gas holder, because the water-sealed water is in direct contact with the gas and stays in the gas holder for a long time (usually from the building of the gas holder to the maintenance or the removal of the gas holder), the water quality is inevitably polluted and influenced by soluble harmful substances in the gas, such as sulfide, cyanide, iron, benzene series, phenol, chromaticity and the like.

Currently, the current practice is. The conventional sewage treatment process mainly comprises a physical treatment method and a biochemical treatment method, wherein the physical treatment method is mainly used for treating specific sewage by a force chemical method, the treatment method is strong in pertinence, and particularly different chemical agents are adopted for chemically treating different pollutants, and the relative treatment effect of the method is obvious. The biochemical treatment process is a method which mainly mixes and contacts the waste water or the solid waste with microorganisms, decomposes organic matters and certain inorganic poisons in the waste water by utilizing the biochemical action in the microorganisms and converts unstable organic matters and inorganic poisons into nontoxic substances; but the biochemical treatment has long debugging period and is not adopted.

The traditional coal gas water seal wastewater treatment process comprises the following steps: a grating well, oil removal and precipitation, flotation and air flotation, reaction and precipitation, ammonia nitrogen stripping, a UASB (upflow anaerobic sludge blanket) anaerobic reactor, primary A/O (anaerobic/anoxic/oxic) biochemical treatment, secondary A/O biochemical treatment and MBR (membrane bioreactor); the method is characterized in that the treatment is carried out by adopting a traditional process method of physicochemical-biochemical combination, firstly, oil removal demulsification is used for removing redundant grease in the wastewater, then, an ammonia nitrogen stripping tower is used for treating ammonia nitrogen contained in the wastewater, and then, anaerobic and facultative oxygen are used for degrading organic matters in the water, and then, MBR membranes are used for filtering and discharging the organic matters up to the standard.

Although it can also play the role of treating gas water seal wastewater, there are many disadvantages, specifically as follows:

1. because the characteristic of coal gas water seal wastewater can be generated in a plurality of cycles, part of wastewater can not be generated continuously, so that the wastewater treatment equipment can not realize long-time continuous treatment, and the utilization rate of the wastewater treatment equipment is low.

2. The organic matters in the wastewater cannot be completely removed by degrading the organic matters by using microorganisms, and a part of organic matters which are difficult to degrade exist after treatment.

3. The microorganism debugging period is longer, and a longer time is needed for culture and domestication after the microorganism is replaced.

4. The reaction time is long, certain requirements are required for the water quality stability, and if the fluctuation is large, unnecessary damage can be caused to microorganisms in the subsequent biochemical treatment, so that the microorganisms need to be re-cultured and domesticated, and the treatment time is prolonged.

5. During intermittent treatment, a large amount of flour, glucose and the like are added to maintain the activity of microorganisms, so that nutrients are provided for the microorganisms, and the treatment cost is increased.

Namely: the coal gas water seal wastewater treatment device is needed, unnecessary time required by biochemical debugging can be effectively reduced, the treatment cost is reduced, and the use efficiency of equipment is effectively improved.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide an integrated gas water seal wastewater treatment device, which can effectively reduce unnecessary time required by biochemical debugging, reduce treatment cost and effectively improve the use efficiency of equipment; the defects of the prior art can be overcome.

The technical scheme of the utility model is that: the integrated coal gas water seal wastewater treatment device comprises a wastewater collecting tank, wherein a raw water lift pump I, a chlorination reaction assembly, a raw water lift pump II, a pressure filter, a multi-medium filtering device and an active carbon adsorption device are sequentially arranged behind the wastewater collecting tank.

The chlorination reaction assembly comprises a pH adjusting tank I, an advanced oxidation tank, a pH adjusting tank II, a coagulation tank and a flocculation tank which are sequentially connected from front to back, wherein the pH adjusting tank I is connected with a wastewater collecting tank, and the flocculation tank is connected with a filter press.

The number of the advanced oxidation ponds is more than one.

And medicament adding pipes are arranged on the pH adjusting tank I, the advanced oxidation tank, the pH adjusting tank II, the coagulation tank and the flocculation tank.

A temporary water storage tank and a raw water lifting pump III are arranged between the filter press and the multi-medium filtering device.

Compared with the prior art, the integrated gas water seal wastewater treatment device comprises a wastewater collecting pool, wherein a raw water lift pump I, a chlorination reaction assembly, a raw water lift pump II, a pressure filter, a multi-medium filtering device and an active carbon adsorption device are sequentially arranged behind the wastewater collecting pool; according to the structure, the chlorination reaction assembly is used for controlling the chlorine adding amount and homogenizing the flow, so that all ammonia nitrogen in the wastewater is reduced to zero, and the wastewater is disinfected; the auxiliary functions of dehydration, filter cake cleaning, direct drying and the like are performed through a filter press to replace the original sedimentation tank, so that the space and the construction cost are effectively saved; clear water quality can be obtained through the multi-medium filtering device, and after a plurality of tests, the filtered effluent suspended matters can be below 5 mg/L; organic matters or toxic substances in the water are adsorbed and removed through an active carbon adsorption device, so that the water is purified; compared with the prior art, unnecessary time required by biochemical debugging can be effectively reduced, the processing cost is reduced, and meanwhile, the equipment using efficiency is effectively improved due to the integration mode and mobility of a plurality of devices.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the connection structure of the present invention.

Wherein, the wastewater collecting tank 1; a raw water lift pump I2; a chlorination reaction assembly 3; a PH adjusting tank I301; an advanced oxidation basin 302; a PH adjusting tank II 303; a coagulation basin 304; a flocculation tank 305; a raw water lift pump II 4; a filter press 5; a multi-media filtration device 6; an activated carbon adsorption device 7; a temporary water storage tank 8.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

Embodiment 1 as shown in fig. 1, an integrated gas water seal wastewater treatment device comprises a wastewater collection tank 1, and a raw water lift pump i 2, a chlorination reaction assembly 3, a raw water lift pump ii 4, a filter press 5, a multi-media filter device 6 and an activated carbon adsorption device 7 are sequentially arranged behind the wastewater collection tank 1.

The chlorination reaction assembly 3 comprises a pH adjusting tank I301, an advanced oxidation tank 302, a pH adjusting tank II 303, a coagulation tank 304 and a flocculation tank 305 which are sequentially connected from front to back, wherein the pH adjusting tank I301 is connected with a wastewater collecting tank 1, and the flocculation tank 305 is connected with a filter press 5; more than one advanced oxidation pond 302 is provided; medicament adding pipes are arranged on the PH adjusting tank I301, the advanced oxidation tank 302, the PH adjusting tank II 303, the coagulation tank 304 and the flocculation tank 305; a temporary water storage tank 8 and a raw water lifting pump III are arranged between the filter press 5 and the multi-medium filtering device 6.

Wherein, the relevant principle is as follows:

chlorination reaction;

the biodegradability of sewage is improved by an oxidation method, a Fenton reagent is a commonly used catalytic reagent, and when the pH value is low enough, hydrogen peroxide can be decomposed to generate OH under the catalytic action of ferrous ions^-Thereby initiating a series of chain reactions; the Fenton's reagent has a very high oxidation capacity due to the fact that it is in Fe²⁺Catalysis of ions with H₂O₂Has low decomposition activation energy (34.9KJ/mol), and can be decomposed to generate hydroxyl radical OH^-. The hydroxyl radical OH is comparable to some other oxidizing agents^-Has higher oxidizing electrode potential and thus strong oxidizing performance. Effect of Fenton's reagent on treatment of hardly degradable organic waste Water the OH group is known from the mechanism of the Fenton's reagent reaction^-Is an effective factor for oxidizing organic substances, and [ Fe ]²⁺]、[H₂O₂]、[OH]Determine OH^-The amount of sodium hypochlorite added thereto is determined by the degree of reaction with the organic substance.

The breakpoint chlorination method is to introduce chlorine or sodium hypochlorite into the waste water to make NH in the waste water₃Oxidation of-N to N₂The chemical denitrification process. When chlorine gas is introduced into the wastewater to a certain point, the content of free chlorine in the wastewater is the lowest, and the concentration of ammonia is reduced to zero. When the amount of chlorine gas introduced exceeds this point, the amount of free chlorine in the water increases. This point is therefore referred to as the break point, and chlorination in this state is referred to as break point chlorination. The actual chlorine amount required for treating the ammonia nitrogen sewage depends on the temperature, the pH value and the ammonia nitrogen concentration. And 9-10 mg of chlorine is needed for oxidizing ammonia nitrogen per gram. The pH value is 6-7, the optimum reaction range is obtained, and the contact time is 0.5-2 hours.

Effluent treated by the breakpoint chlorination method generally needs to be subjected to dechlorination by using activated carbon or sulfur dioxide before being discharged so as to remove residual chlorine in the water. About 0.9 to 1.0mg of sulfur dioxide is required for 1mg of residual chlorine. Hydrogen ions are generated during the reverse chlorination, but the decrease in pH caused by this is generally negligible, so that only about 2mg (as CaCO 3) is consumed to remove 1mg of residual chlorine. The mechanism of ammonia removal by the breakpoint chlorination method is as follows:

Cl₂+H₂O→HOCl+H⁺+Cl^－

NH⁴⁺+HOCl→NH₂Cl+H⁺+H₂O

NHCl₂+H₂O→NOH+2H⁺+2Cl^－

NHCl₂+NaOH→N₂+HOCl+H⁺+Cl^－

the most outstanding advantage of the breakpoint chlorination method is that the chlorine addition amount and the flow can be correctly controlled for homogenization, so that all ammonia nitrogen in the wastewater is reduced to zero, and the wastewater can be disinfected.

Filter pressing system

The filter press is a traditional solid-liquid separation equipment and has strong universality. It can be said that solid and liquid substances, as long as they are present, can be separated by means of a filter press.

In addition, the conventional filter press has an auxiliary function such as cake washing and direct drying, in addition to a dewatering function. This is not possible with many solid-liquid separation devices.

Replace the original sedimentation tank and effectively save space and construction cost

Multi-media advanced filtration system multi-media filters (also known as mechanical filters) are typically multi-media filters having a bed of layered anthracite, sand, finely divided garnet, or other material. The top layer of the bed consists of the lightest and coarsest grades of material, while the heaviest and finest grades of material are placed in the lower part of the bed. The principle is depth filtration-larger particles in the water are removed at the top layer and smaller particles are removed deeper in the filter media. Thereby leading the water quality to reach the standard after coarse filtration. The device is of a pressure type, and the principle is that when raw water passes through the filter material from top to bottom, suspended matters in the water are intercepted by the surface of the filter layer due to the adsorption and mechanical flow resistance; when water flows into the middle of the filter layer, because the sand grains in the filter layer are arranged more tightly, particles in water have more chances to collide with the sand grains, then flocs, suspended matters and the surfaces of the sand grains in the water are adhered to each other, impurities in the water are trapped in the filter layer, and thus clear water quality is obtained. The suspension of the effluent after filtration can be below 5 mg/L.

Activated carbon adsorption system

The water purification by the activated carbon adsorption method is to remove organic matters or toxic substances in the water by utilizing the porous solid surface of the activated carbon adsorption method so as to purify the water. Research shows that the activated carbon has stronger adsorption capacity on organic matters with the molecular weight of 500-1000. The adsorption of the activated carbon on the organic matters is influenced by the pore size distribution and the characteristics of the organic matters, mainly by the polarity and the molecular size of the organic matters. The organic matter with the same size has higher solubility and stronger hydrophilicity, and the active carbon has poorer adsorbability to the organic matter, and conversely, the organic matter with lower solubility, poorer hydrophilicity and weaker polarity, such as benzene compounds, phenol compounds and the like, has stronger adsorbability.

The adsorption of organic matter in water by activated carbon is a complex process that results from the combination of several forces, including ionic attraction, van der waals forces, chemical impurities and forces. According to the theory of double-rate diffusion of adsorption, the adsorption is a double-rate process consisting of two stages of rapid diffusion and slow diffusion, the rapid diffusion is completed within a few hours, and the adsorption capacity of 60-80% of activated carbon is exerted. Rapid diffusion is the process by which organic matter diffuses through large pores of small resistance that are uniformly distributed radially within the carbon particles. These large pores create a radial diffusion resistance. The diffusion of molecules from the macropores further into the micropores communicating with the macropores is extremely slow due to the large resistance created by the narrow pore size. The micropores are also uniformly distributed in the carbon particles, but do not constitute a radial diffusion resistance.

The design adopts a chlorination method to replace a conventional ammonia nitrogen stripping tower to treat ammonia nitrogen.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims (5)

1. The utility model provides an integrated form coal gas water seal effluent treatment plant, it includes waste water collecting pit (1), its characterized in that: a raw water lift pump I (2), a chlorination reaction assembly (3), a raw water lift pump II (4), a filter press (5), a multi-medium filtering device (6) and an active carbon adsorption device (7) are sequentially arranged behind the wastewater collecting tank (1), and a clear liquid discharge pipe is arranged on the active carbon adsorption device (7).

2. The integrated gas water seal wastewater treatment device according to claim 1, wherein: chlorination reaction assembly (3) include by preceding consecutive PH equalizing basin I (301), advanced oxidation pond (302), PH equalizing basin II (303), thoughtlessly congeal pond (304) and flocculation basin (305) after to, PH equalizing basin I (301) link to each other with waste water collecting pit (1), flocculation basin (305) link to each other with pressure filter (5).

3. The integrated gas water seal wastewater treatment device according to claim 2, wherein: the number of the advanced oxidation ponds (302) is more than one.

4. The integrated gas water seal wastewater treatment device according to claim 2 or 3, wherein: medicament adding pipes are arranged on the PH adjusting tank I (301), the advanced oxidation tank (302), the PH adjusting tank II (303), the coagulation tank (304) and the flocculation tank (305).

5. The integrated gas water seal wastewater treatment device according to claim 2 or 3, wherein: a temporary water storage tank (8) and a raw water lifting pump III are arranged between the filter press (5) and the multi-medium filtering device (6).

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