CN113493230A - Semi-continuous contact freezing type sewage/wastewater separation treatment device - Google Patents

Abstract

The invention discloses a semi-continuous contact freezing type sewage/wastewater separation treatment device, which is mainly used for realizing wastewater treatment through three processes of precooling, freezing and deicing. Can realize semi-continuous high-efficiency separation treatment of sewage and wastewater. The device is highly integrated, simple and reliable, flexible to operate, strong in continuous processing capacity, low in equipment running cost, capable of replacing a compressor set when the ambient temperature is appropriate, and further capable of reducing energy consumption. The produced ice can participate in the recycling of energy and can also be sold to cold chains and cold storages.

Description

Semi-continuous contact freezing type sewage/wastewater separation treatment device

Technical Field

The invention belongs to the technical field of freezing separation, and particularly relates to a semi-continuous contact freezing type sewage/wastewater separation treatment device.

Background

Water is an indispensable important resource for the survival and development of human society, China is a country with serious shortage of water resources, and therefore green and efficient processes should be realized for water treatment as much as possible. Along with the development of urbanization and industrialization in recent years, the types of water pollution are gradually increased, and the amount of sewage and wastewater is gradually increased, so that the difficulty of water treatment is increased day by day.

The freeze separation method is an effective water treatment method and utilizes the characteristic principle that water molecules are easier to change phase and condense into ice compared with other substances in a freezing field with gradually reduced temperature, and foreign matters and impurities are rejected in the crystallization process of molecular rearrangement to form pure ice and concentrated solution. The method has the advantages that purer ice is obtained through a physical phase change process, the volume of the waste water is concentrated, no medicament is required to be added, the operation flow is simplified, the process effect can be stabilized at a higher level, and the produced ice can also have various application approaches.

Compared with other methods such as a suspension crystallization freezing method and the like, the progressive freezing method has the advantages that ice formation is single lamellar crystals, the condensation ice formation process is more controllable, solid-liquid separation is easier, and meanwhile, required equipment is relatively simple and low in cost.

For the construction of a refrigerating device, ice-water separation, energy efficient utilization and refrigerating treatment effect are always the key problems. At present, related designs all belong to batch type processes, and part of devices are easy to cause energy loss, for example, a wastewater treatment method and a system (CN109110853A), a freezing method and an evaporation method are combined, although waste heat generated by equipment is utilized, wastewater with lower temperature is directly heated, so that the low-temperature energy cannot be effectively utilized, and the operation cost of the equipment is increased to a certain extent. For example, a continuous freezing crystallization separation system (CN 205387483U) applied to wastewater is separately provided with an ice crystal washing device, so that the cost of equipment setup and operation is increased, and at the same time, part of ice crystals are reintroduced into a crystallization tank, which easily causes instability of water quality, and has certain requirements on the working environment temperature and the washing water temperature, which easily affects the ice production efficiency. Furthermore, the current concept generally involves an integral cold-heat variation in the succession of the various process stages, which in turn results in further energy waste and a reduction in the processing rate.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a semi-continuous contact freezing type sewage/wastewater separation treatment device, redesign the freezing separation method and energy utilization, construct a more reasonable semi-continuous type ice-water separation device under the condition of fully utilizing residual cold, and carry out green and efficient treatment on wastewater.

In order to solve the technical problems, the invention adopts the technical scheme that: a semi-continuous contact freezing type sewage/wastewater separation treatment device is characterized in that a refrigerator storage box is arranged on one side of the bottom of the inner side of a shell, a buffering slope facing the refrigerator storage box is arranged on the other side of the bottom of the inner side of the shell, the lower half part of the buffering slope is positioned in the refrigerator storage box, the refrigerator is arranged on the top surface of the refrigerator storage box far away from the buffering slope, a turnover plate for dust prevention and heat preservation and used for sealing the top of the refrigerator storage box is arranged between the refrigerator storage box and the buffering slope, the turnover plate can guide ice blocks falling from the upper part to enter the refrigerator storage box, a concentrated wastewater outlet communicated with the refrigerator storage box and an ice water outlet communicated with the refrigerator storage box are arranged on the outer side of the shell opposite to the buffering slope, and an external water inlet pre-cooling pipe is communicated with the refrigerator storage box through the buffering slope and the interior of the refrigerator storage box;

a crawler belt is arranged right above the freezing box at the inner side of the shell, the crawler belt is restrained by three rotating rollers and is divided into three parts, one part of the crawler belt is parallel to the freezing box and is close to the top of the freezing box, contact pieces are arranged at equal intervals at the outer side of the crawler belt, and the contact pieces can be immersed into the freezing box for a certain length and can be separated from the freezing box under the condition that a certain amount of ice blocks are attached; two cold conduction beds and a heat transfer bed are arranged in a triangular space enclosed by the crawler belt, the second cold conduction bed is positioned at the inner side of the crawler belt part which is close to and parallel to the freezing box, the first cold conduction bed and the heat transfer bed are positioned at the inner sides of the other two parts of the crawler belt, so that in the running process of the crawler belt, the contact pieces can be precooled by the first cold conduction bed and frozen by the second cold conduction bed and then heated by the heat transfer bed to realize deicing, and the crawler belt at the corresponding position of the heat transfer bed is obliquely positioned above the buffering slope and the turnable plate;

the outer side of a track corresponding to the first cold guide bed is provided with a water purification spraying pipe for cleaning a contact piece, the first cold guide bed, the second cold guide bed and a heat transfer bed are respectively arranged on a slide way which is vertical to the horizontal track section, the second cold guide bed and the heat transfer bed are connected through a transmission rod, an elliptical transmission shaft is arranged in a triangular space defined by the track, the outer side of the elliptical transmission shaft is provided with a pair of steel sheets which are respectively connected to the first cold guide bed and the second cold guide bed, when the elliptical transmission shaft rotates, the steel sheets are extruded to stretch to push the first cold guide bed and the second cold guide bed to move on the slide way and to be in close contact with the track, and meanwhile, the transmission rod is driven to enable the heat transfer bed to move on the slide way and to be also in close contact with the track.

At least one of the three rotating rollers is elastically connected to the shell or the structural support of the device, and the other two rollers are rigidly fixed.

The bottom surfaces of the first cold conduction bed, the second cold conduction bed and the heat transfer bed, which are in contact with the track, are made of materials with high heat conductivity coefficients, and the other surfaces are made of materials with low heat conductivity coefficients.

The shell is provided with a compressor unit and a refrigerant box outside, refrigerants are input into the first cooling guide bed and the second cooling guide bed through heat exchange hoses and circulate, and the heating control is realized by the heating wires contained in the heat transfer beds.

The first cold guide bed and the second cold guide bed adopt the environment as a cold source, and the heat transfer bed comprises an electric heating wire to realize temperature rise control.

The contact pieces are made of materials with high heat conductivity coefficient, and the contact pieces are arranged on the crawler belt in a plurality of rows and columns at intervals.

An elastic one-way opening and closing heat preservation baffle is arranged between the freezing box and the crawler.

And a liftable sealing cover is arranged outside the purified water spraying pipe.

A stirring device is arranged at one side in the freezing box.

The invention has the beneficial effects that:

1. the semi-continuous contact freezing wastewater separation device highly integrates the processes of precooling, freezing and deicing, and has the advantages of higher energy efficiency ratio, low operation cost, simple and reliable equipment, simple and flexible operation, easy copy and scale enlargement on the basis of improving the treatment effect based on the freezing separation principle.

2. The device realizes semi-continuous operation, and continuous throughput is strong, and the efficiency of single production ice is higher, and the volume of freezing once-forming ice can reach 60% of total water yield in the freezer, and dirty waste water can be concentrated through handling many times, discharges again and concentrates the solution. The produced ice blocks can pre-cool the sewage and the wastewater or directly store the sewage and the wastewater, so that the cyclic utilization of energy sources is effectively ensured; can also be sold to cold chains and cold storages to create value.

3. The effluent quality treated by the device has better performance on the removal rate of COD, TOC, inorganic salts and heavy metal ions, and when the concentration of impurities in the original sewage is lower than 1g/l, the removal effect of the device can reach 95%; when the impurity concentration in the raw sewage wastewater is higher than 5g/l, the removal effect of the device can reach 60%, and the type and the volume of the wastewater can be subjected to targeted treatment by adjusting the parameters of the device.

4. In partially cold regions and seasons, the environment can be used as a cold source to replace a compressor unit, and energy consumption is further reduced.

Drawings

FIG. 1 is a schematic view showing the construction of a semi-continuous contact freezing type sewage/wastewater separation treatment apparatus according to the present invention.

FIG. 2a is a schematic diagram of the semi-continuous contact freezing type sewage/wastewater separation treatment device of the present invention when the elliptical drive shaft is not driven.

FIG. 2b is a schematic view showing the driving of the elliptical driving shaft of the semi-continuous contact freezing type sewage/wastewater separation treatment apparatus according to the present invention.

Fig. 3 is a schematic view showing the relative positions of the caterpillar and the contact piece of the semi-continuous contact freezing type sewage/wastewater separation treatment apparatus of the present invention.

Fig. 4 is a graph showing the change in contaminant concentration before and after the sewage/wastewater treatment using the apparatus of the present invention.

FIG. 5 is a graph showing the removal rate of contaminants before and after sewage/wastewater treatment using the apparatus of the present invention.

In the figure: 1 sealing cover, 2 clean water spray pipes, 3-1 first cooling guide bed, 3-2 second cooling guide bed, 4 rotating rollers, 5 heat exchange hoses, 6 refrigerant boxes, 7 compressor units, 8 freezer boxes, 9 concentrated wastewater outlets, 10 ice water outlets, 11 tracks, 12 slideways, 13 contact pieces, 14 heat transfer beds, 15 transmission rods, 16 steel sheets, 17 elliptical transmission shafts, 18 heat preservation baffles, 19 stirring devices, 20 turnover plates, 21 buffer slopes, 22 refrigerator storages, 23 water inlet pre-cooling pipes and 24 shells.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the semi-continuous contact freezing type sewage/wastewater separation treatment device of the present invention comprises a housing 24, a refrigerator 22 disposed at one side of the bottom of the housing, a buffering slope 21 disposed at the other side of the housing and facing the refrigerator, a lower half portion of the buffering slope 21 being disposed in the refrigerator 22, a freezing chamber 8 disposed on the top surface of the ice storage chamber 22 at the side far from the buffering slope 21, a reversible plate 20 disposed between the ice storage chamber 22 and the buffering slope 21 for dust prevention and heat preservation and sealing the top of the refrigerator 22, the reversible plate 20 being capable of guiding ice cubes falling from the upper portion into the refrigerator 22, a concentrated wastewater outlet 9 disposed at the outer side of the housing 24 at the side opposite to the buffering slope 21 and communicating with the freezing chamber 8, and an ice water outlet 10 communicating with the ice storage chamber 22, and an external water inlet pre-cooling pipe 23 communicating with the freezing chamber 8 via the buffering slope 21 and the interior of the ice storage chamber 22;

a crawler belt 11 is arranged right above the freezer 8 at the inner side of the shell, the crawler belt 11 is restrained by three rotating rollers 4 and is divided into three parts, one part of the three parts is parallel to the freezer 8 and is close to the top of the freezer 8, contact pieces 13 are arranged at equal intervals at the outer side of the crawler belt 11, and the contact pieces 13 can be immersed into the freezer for a certain length and can be separated from the freezer 8 under the condition that a certain amount of ice blocks are attached; two cold conduction beds and a heat transfer bed are arranged in a triangular space enclosed by the crawler belt 11, the second cold conduction bed 3-2 is positioned at the inner side of the part of the crawler belt 11 which is close to and parallel to the freezing box 8, the first cold conduction bed 3-1 and the heat transfer bed 14 are positioned at the inner sides of the other two parts of the crawler belt 11, so that in the running process of the crawler belt 11, contact pieces can be precooled by the first cold conduction bed 3-1 and frozen by the second cold conduction bed 3-2, then ice removal is realized by heating the heat transfer bed 14, and the crawler belt at the corresponding position of the heat transfer bed 14 is obliquely positioned above the buffering slope 21 and the turnable plate 20;

a clean water spray pipe 2 for cleaning a contact piece 13 is arranged on the outer side of a track 11 corresponding to the first cold conduction bed 3-1, the second cold conduction bed 3-2 and a heat transfer bed 14 are respectively arranged on a slide way 12 which is vertical to the track section arranged horizontally, the second cold conduction bed 3-2 and the heat transfer bed 14 are connected through a transmission rod 15, an elliptical transmission shaft 17 is arranged in a triangular space enclosed by the crawler belt 11, a pair of steel sheets 16 respectively connected to the first cold guiding bed 3-1 and the second cold guiding bed 3-2 is arranged outside the elliptical transmission shaft 17, when the elliptical transmission shaft 17 rotates, the extrusion steel sheet 16 is opened to push the first cold guide bed 3-1 and the second cold guide bed 3-2 to move on the slideway 12 and to be tightly contacted with the crawler belt 11, at the same time, the transmission rod 15 is driven to move the heat transfer bed 14 on the slideway 12 and to be in close contact with the crawler belt 11.

At least one of the three turning rolls 4 is elastically connected to the housing 24 or structural support of the device, the other two being rigidly fixed.

The bottom surfaces of the first cold conduction bed 3-1, the second cold conduction bed 3-2 and the heat transfer bed 14, which are in contact with the caterpillar band 11, are made of materials with high heat conductivity coefficients, and the other surfaces are made of materials with low heat conductivity coefficients.

The compressor unit 7 and the refrigerant box 6 are arranged outside the shell 24, refrigerant is input into the first cold conduction bed 3-1 and the second cold conduction bed 3-2 through the heat exchange hose 5 and circulates, and the heat transfer bed 14 comprises an electric heating wire to realize temperature rise control.

The first cold conduction bed 3-1 and the second cold conduction bed 3-2 adopt the environment as a cold source, and the heat transfer bed 14 comprises an electric heating wire to realize temperature rise control.

The contact pieces 13 are made of materials with high heat conductivity coefficient, and are arranged on the crawler belt 11 in a staggered manner in multiple rows and multiple columns.

An elastic one-way opening and closing heat preservation baffle 17 is arranged between the freezing box 8 and the crawler belt 11.

The outer side of the water purification spray pipe 2 is provided with a liftable sealing cover 1.

A stirrer 19 is installed at one side in the freezer compartment 8.

Specifically, a refrigerator storage 22 is provided right below the freezer compartment 8; the concentrated wastewater outlet 9 and the ice water outlet 10 are respectively arranged at one side of the freezing box 8 and one side of the ice storage box 22, the buffering slope 21 is fixed at the other side, and the connection part of the two is provided with a turnover plate 20; the water inlet pre-cooling pipe 23 is connected with the freezing box 8 through the buffering slope 21 and the ice storage box 22, the wastewater enters the freezing box 8 after being pre-cooled in the ice storage box 22, and the stirring device 19 is arranged at one side in the freezing box 8. The crawler belt 11 is arranged right above the freezing box 8, and an elastic one-way opening and closing heat preservation baffle 17 is arranged between the crawler belt and the freezing box. The track is constrained by three rollers 4, divided into three portions, one of which is parallel to the freezer compartment 8; the outer side of the crawler belt 11 is equidistantly provided with vertical contact pieces 13; the two cold guiding beds 3-1 and 3-2 and the heat transfer bed 14 are both arranged on a slideway 12 which is vertical to a horizontally arranged track section (namely vertical to the ground and the freezing box 8) and positioned at the inner side of the track 11, wherein the second cold guiding bed 3-2 is arranged in a position parallel to the freezing box 8, and the first cold guiding bed 3-1 and the heat transfer bed 14 are respectively arranged at the front section and the rear section of the running direction of the track 11. At least one of the three turning rolls 4 of the device is elastically connected to the housing 24 or structural support of the device, the others are rigidly fixed.

The contact pieces 13 are made of aluminum and aluminum alloy materials with high heat conductivity coefficients, the contact pieces are arranged on the track 11 at intervals in a staggered mode, the parts, connected with the contact pieces, on the track are made of the same materials, and other parts, not connected with the contact pieces 13, are made of engineering plastics with low heat conductivity coefficients. In addition, the bottom surfaces of the cooling and heat transfer beds 14, which are in contact with the tracks, are also made of aluminum and aluminum alloy materials with high thermal conductivity, and the other surfaces are made of foamed polyurethane materials with low thermal conductivity; a refrigerant box 6 which is refrigerated by the compressor unit 7 is arranged outside the shell 24, and refrigerant is input into the cooling guide bed through a heat exchange hose 5 and circulates to realize cooling control; the heat transfer bed 14 contains electrical heating wires to achieve temperature rise control.

When the elliptic transmission shaft 17 rotates to a vertical position and extrudes the steel sheet 16, the steel sheet expands to drive the transmission rod 15, and the cooling conduction bed and the heat transfer bed 14 are further pushed to move on the slideway 12 and to be tightly contacted with the crawler belt 11; when the elliptical transmission shaft returns to the horizontal position, the steel sheet 16 returns to the original position and is locked, and the transmission rod, the cold conduction bed and the heat transmission bed also return to the original positions and are separated from the crawler belt 11, so that the lifting and pressing processes are realized.

The operation of the device mainly realizes the treatment of wastewater through three processes of precooling, freezing and deicing, a water purification spray pipe 2 is arranged on the outer side of the crawler belt 11 corresponding to the first cold guide bed 3-1, and a liftable sealing cover 1 is arranged on the outer side of the first cold guide bed. When the sealing cover 1 descends and the cooling guide bed and the heat transfer bed 14 are in contact with the crawler belt 11, partial contact pieces 13 positioned in the first cooling guide bed 3-1 and the sealing cover 1 perform a 'precooling' process, are cleaned under the spraying of the water purification spraying pipe 2, and form a clean ice layer on the surface. And a part of the contact pieces 13 in the freezing box 8 are subjected to a freezing process, receive the low temperature transferred by the second cold guide bed 3-2, further grow and condense on the basis of a clean ice layer on the surface, and realize the separation treatment of sewage and wastewater in the freezing box 8. The contact pieces 13 at the heat transfer bed 14 absorb the heat transferred from the heat transfer bed, so as to perform the ice-removing process, and the melted and fallen ice blocks pass through the buffering slope 21 and the turnover plate 20 and enter the ice storage box 22.

Thereafter, the sealing cover 1 is lifted, the elliptical transmission shaft 17 rotates, the cooling guide bed and the heat transfer bed 14 are separated from the crawler belt 11, the crawler belt runs to enable the contact pieces after the pre-cooling to enter the freezing box 8, the contact pieces after the freezing are finished 13 reach the ice removing position, and the contact pieces after the ice removing are finished come to be right below the sealing cover 1 and the pure water spray pipe 2. As the sealing cap 1 descends, the cooling and heat transfer beds 14 contact the caterpillar track 11, and a new round of "precooling", "freezing" and "deicing" process is started. Wherein the rotating rollers 4 which are elastically connected can increase the length of the contact piece extending into the freezing box under the lifting and pressing actions of the cooling guide bed and the heat transfer bed, and ensure the heat conductivity and the sealing property among all the parts. Thus, the device repeatedly carries out the processes of precooling, freezing and deicing, and realizes semi-continuous efficient separation treatment.

The buffering slope is used for buffering the impact effect on the device caused by the falling of the ice blocks and guiding the ice blocks to enter the refrigerator, and a turnover plate is arranged at the joint of the ice blocks and the refrigerator for dust prevention and heat preservation; the water inlet pre-cooling pipe is connected with the freezing box through the buffering slope and the ice storage box, the wastewater can enter the freezing box after being pre-cooled by the ice storage box, the crawler belt is arranged right above the freezing box and is restrained by three rotating rollers to be divided into three parts, and one part is parallel to the freezing box; the outer sides of the crawler belts are equidistantly provided with contact pieces which can be immersed into the freezer for a certain length and can be taken out of the freezer under the condition that a certain amount of ice blocks are attached.

2 cold conduction beds and a heat transfer bed, wherein one cold conduction bed is arranged at the inner side of the crawler belt part parallel to the freezing box, the other cold conduction bed and the heat transfer bed are arranged at the inner sides of the other 2 parts of the crawler belt, and the relative positions ensure that in the running process of the crawler belt, the contact pieces are heated and deiced through the heat transfer bed after being precooled and frozen by the 2 cold conduction beds; a water purification spraying pipe is arranged on the outer side of the track corresponding to the cold guide bed with the pre-cooling function, the contact piece is cleaned, and meanwhile, part of purified water is attached to the contact piece, so that a clean ice crystal layer is formed on the surface of the contact piece before the contact piece enters the freezing box, the ice forming cleanness is improved, and the wastewater treatment effect is ensured; the outer side of the water purification spraying pipe is provided with the sealing cover capable of lifting, when the freezing process occurs, the sealing cover descends to improve the precooling effect, and rises after the freezing process is finished, so that the operation of the crawler belt is not influenced.

When the elliptical transmission shaft is rotated to a certain position, for example, the elliptical transmission shaft is rotated to a vertical position from a locking state of a horizontal position, the extrusion steel sheet is expanded to drive the transmission rod to further push the cooling guide bed and the heat transfer bed to move on the slide way, so that the cooling guide bed and the heat transfer bed are in close contact with the crawler, temperature conduction is realized, when the elliptical transmission shaft is recovered, the steel sheet is recovered to an original position, and the transmission rod, the cooling guide bed and the heat transfer bed are also recovered to the original position and are separated from the crawler. At least one of the three rotating rollers is in elastic connection, when the elliptical transmission shaft rotates to enable the transmission rod, the cold guide bed and the heat transfer bed to displace, the crawler belt can correspondingly realize larger deformation, the attaching degree with the cold guide bed and the heat transfer bed is improved, meanwhile, the length of the contact piece extending into the freezing box can be increased, and the freezing condensation effect is guaranteed.

The parts of the track connected with the contact pieces are made of materials with high heat conductivity coefficients, and the other parts not connected with the contact pieces are made of materials with low heat conductivity coefficients, so that energy loss is reduced to a certain extent. The contact pieces are made of materials with high heat conductivity coefficient, and can be arranged on the crawler belt at intervals in a staggered mode, ice crystals are prevented from being condensed on the contact pieces too much, ice blocks can be conveniently melted and dropped in time, and meanwhile the burden of the crawler belt during ice making is relieved.

An elastic one-way opening and closing heat preservation baffle is arranged between a freezing box and a crawler belt of the device, and when a contact piece in the freezing box makes ice, the heat preservation baffle can seal the crawler belt and the freezing box, so that the energy loss is reduced, and the dustproof effect is achieved; after the cold freezing is finished, the heat-insulating baffle plate is opened along with the movement of the crawler; the turnover heat-preservation baffle is arranged between the buffering slope and the freezing box, so that ice in the ice storage box can be preserved to a great extent while ice blocks smoothly enter the ice storage box.

The invention is based on the progressive freezing separation principle, organically combines a freezing separation method with the circulating advancing motion of the crawler, carries out freezing separation treatment on the wastewater through three stages of precooling, freezing and thawing separation, and separates clean ice through the transfer of the crawler after the wastewater is crystallized on a contact piece, wherein ice blocks can be stored or the reutilization of residual cold is realized, and then cleaner water obtained by thawing the ice blocks is discharged. The automatic water feeding, freezing and collecting functions are easily realized by controlling the track, the rotating roller, the water inlet pre-cooling pipe, the ice water outlet, the concentrated wastewater outlet, the cold conducting bed and the heat transfer bed. The device has a simple and stable structure, can effectively solve the problem of ice-water separation in the wastewater treatment process, has strong adaptability to different types of wastewater, particularly inorganic salts which are difficult to treat and volatile micromolecule organic matters, can adjust equipment parameters according to the types of the wastewater, has strong adaptability, can be widely applied to multiple fields of water treatment, and has wide development prospect.

The device of the invention has high water production efficiency and high removal rate of soluble substances, and the treatment effect is shown in figures 4 and 5 and table 1. When the solutes in the raw sewage wastewater are respectively sodium sulfate and glucose and the concentration is lower than 1g/l, after a treatment process, the removal effect of the device on COD in sulfate ions and glucose can reach about 95 percent, and the volume of the sewage wastewater can be reduced by about 60 percent.

Table 1 shows the processing data of the apparatus for solutes in solution

The kind of contaminant	Before treatment (mg/l)	After treatment (mg/l)	Removal Rate (%)
				Sulfate ion	460	20	95.65％
Glucose (COD)	137.84	8.42	93.89％
				Actual waste water (sulfate ion)	73.8	7.15	90.68％
Actual waste water (COD)	201.84	30	85.14％

In the MVR condensation wastewater treatment, the ion chromatography and the potassium dichromate oxidation method are adopted to respectively detect the sulfate ion concentration and the COD in the effluent, wherein the removal rate of the sulfate ions in the effluent is about 90 percent, and the removal rate of the COD is about 85 percent. The sewage and the wastewater can be concentrated by multiple treatments and then discharged and intensively solved. The produced ice can be used for pre-cooling sewage and wastewater, and can be sold to a cold chain and a cold storage, so that the value is created.

In summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.

Claims (9)

1. A semi-continuous contact freezing type sewage/wastewater separation treatment device is characterized in that a refrigerator storage box (22) is arranged on one side of the bottom of the inner side of a shell (24), a buffer slope (21) facing the refrigerator storage box is arranged on the other side of the bottom of the inner side of the shell (24), the lower half part of the buffer slope (21) is positioned in the refrigerator storage box (22), a freezing box (8) is arranged on the top surface of the refrigerator storage box (22) far away from the buffer slope (21), a turnover plate (20) which seals the top of the refrigerator storage box (22) and is used for dust prevention and heat preservation is arranged between the refrigerator storage box (22) and the buffer slope (21), the turnover plate (20) can guide ice blocks falling from the upper part to enter the refrigerator storage box (22), a concentrated wastewater outlet (9) communicated with the freezing box (8) and an ice water outlet (10) communicated with the refrigerator storage box (22) are arranged on the outer side of the shell (24) opposite to the buffer slope (21), and an external water inlet pipe (23) is communicated with the freezing box (8) through the interior of the buffer slope (21) and the ice storage box (22) Opening;

a crawler belt (11) is installed right above the freezing box (8) on the inner side of the shell, the crawler belt (11) is restrained by three rotating rollers (4) and is divided into three parts, one part of the crawler belt is parallel to the freezing box (8) and is close to the top of the freezing box (8), contact pieces (13) are arranged on the outer side of the crawler belt (11) at equal intervals, and the contact pieces (13) can be immersed into the freezing box for a certain length and can be separated from the freezing box (8) under the condition that a certain amount of ice blocks are attached; two cold conduction beds and a heat transfer bed are arranged in a triangular space surrounded by the crawler belt (11), the second cold conduction bed (3-2) is positioned at the inner side of the part of the crawler belt (11) which is close to and parallel to the freezing box (8), the first cold conduction bed (3-1) and the heat transfer bed (14) are positioned at the inner sides of the other two parts of the crawler belt (11), so that in the running process of the crawler belt (11), contact pieces can be precooled by the first cold conduction bed (3-1) and frozen by the second cold conduction bed (3-2), then ice removal is realized by heating the heat transfer bed (14), and the crawler belt at the corresponding position of the heat transfer bed (14) is obliquely positioned above the buffer slope (21) and the turnable plate (20);

a clean water spray pipe (2) for cleaning a contact piece (13) is arranged on the outer side of a track (11) corresponding to a first cold guiding bed (3-1), the first cold guiding bed (3-1), a second cold guiding bed (3-2) and a heat transfer bed (14) are respectively arranged on a slide way (12) which is vertical to a track section horizontally arranged, the second cold guiding bed (3-2) and the heat transfer bed (14) are connected through a transmission rod (15), an elliptical transmission shaft (17) is arranged in a triangular space enclosed by the track (11), a pair of steel sheets (16) respectively connected to the first cold guiding bed (3-1) and the second cold guiding bed (3-2) is arranged on the outer side of the elliptical transmission shaft (17), when the elliptical transmission shaft (17) rotates, the extrusion steel sheets (16) are expanded to push the first cold guiding bed (3-1) and the second cold guiding bed (3-2) to move on the slide way (12) and tightly contact with the track (11), meanwhile, the transmission rod (15) is driven to enable the heat transfer bed (14) to move on the slideway (12) and to be in close contact with the caterpillar track (11).

2. Semi-continuous contact freezing type sewage/wastewater separation treatment plant according to claim 1, characterized in that at least one of said three rotating rollers (4) is elastically connected to the housing (24) or structural support of the plant, the other two being rigidly fixed.

3. The semi-continuous contact freezing type sewage/wastewater separation treatment device according to claim 1, wherein the first cooling conducting bed (3-1), the second cooling conducting bed (3-2) and the bottom surface of the heat transfer bed (14) in contact with the crawler belt (11) are made of materials with high thermal conductivity, and the other surfaces are made of materials with low thermal conductivity.

4. The semi-continuous contact freezing type sewage/wastewater separation treatment device according to claim 1, wherein a compressor unit (7) and a refrigerant tank (6) are arranged outside the housing (24), refrigerant is input into the first cooling conduction bed (3-1) and the second cooling conduction bed (3-2) through a heat exchange hose (5) and circulates, and an electric heating wire is contained in the heat transfer bed (14) to realize temperature rise control.

5. The semi-continuous contact freezing type sewage/wastewater separation treatment device according to claim 1, wherein the first cold conduction bed (3-1) and the second cold conduction bed (3-2) adopt environment as cold sources, and the heat transfer bed (14) comprises electric heating wires to realize temperature rise control.

6. The semi-continuous contact freezing type sewage/wastewater separating and treating device according to claim 1, wherein the contact pieces (13) are made of a material with high thermal conductivity, and the contact pieces are arranged on the crawler belt (11) in a plurality of rows and a plurality of columns at intervals.

7. The semi-continuous contact freezing type sewage/wastewater separation treatment device according to claim 1, wherein an elastic one-way opening and closing heat preservation baffle (17) is arranged between the freezing box (8) and the crawler (11).

8. The semi-continuous contact freezing type sewage/wastewater separation treatment device according to claim 1, wherein a liftable sealing cover (1) is installed outside the clean water spray pipe (2).

9. The semi-continuous contact freezing type sewage/wastewater separation treatment plant according to claim 1, wherein an agitating device (19) is installed at one side inside the freezing chamber (8).

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