CN103290715A - Waste paper deinking process and apparatus thereof - Google Patents

Abstract

The invention relates to the technical field of papermaking, in particular to a waste paper deinking process and equipment thereof. A waste paper deinking process, including the following steps implemented in sequence: pulping, filtering, dilution, flotation deinking, preliminary concentration, re-concentration, deinking and degumming of waste water, recycling and reuse of white water, and transporting the white water to the waste paper respectively. Slurry, filtration, dilution and flotation deinking steps continue to recycle. A waste paper deinking equipment, including a pulper, a sieving machine, a dilution device, a flotation deinking machine, a pre-concentration device, a high-speed pulp washer, a waste water deinking and degumming machine, and a deinking and degumming machine for deinking and degumming waste water to obtain The white water is transported to the recycling device of the pulper, sieving machine, dilution device or flotation deinking machine respectively. The beneficial effects of the present invention are: low energy consumption, simple structure, easy to use, good deinking effect, zero waste water Emission, environmental protection and energy saving, improve deinking efficiency, and occupy a small space.

Description

Waste paper deinking process and its equipment

technical field

The invention relates to the technical field of papermaking, in particular to a waste paper deinking process and equipment thereof.

Background technique

The two most important production factors in the paper industry include low-energy production and environmental protection. If these two tasks are properly grasped, it will reduce a large share of the company's cost expenditure, which will result in high profits. Therefore, the paper industry has no idea how to deal with The problem of wastewater treatment has been studied hard, but the traditional wastewater treatment devices, such as dissolved air flotation equipment, have the following disadvantages in the treatment of papermaking wastewater:

1. The cost of wastewater treatment is high. It costs about 0.6 yuan per cubic meter of water, and the cost of wastewater treatment is extremely high.

2. Waste of energy. Unreacted chemical agents, heat generated during production, and abundant fibers will remain in the waste water produced by papermaking. After being treated by this equipment, the above resources will be processed and the waste water will be directly turned into clean water, which is wasted. Lots of resources above.

In addition, in the papermaking production process, due to the different slurry concentrations required in each process, the pump body needs to have different delivery power. Restrictions require a high-power pump body to transport, which virtually increases energy consumption and increases cost input.

Contents of the invention

The purpose of the present invention is to provide a waste paper deinking process to solve the technical problems of waste water discharge in the traditional papermaking process, resulting in energy waste, environmental pollution, high energy consumption and high papermaking cost.

As far as the waste paper deinking process is concerned, the present invention is achieved in that a waste paper deinking process comprises the following steps implemented sequentially:

Pulping, mixing waste paper, water and chemicals to make a slurry;

Filtration to remove impurities in the slurry;

Dilution, adding water to the slurry to dilute the slurry concentration to 0.5%-0.7%;

Flotation deinking, the slurry is transported to the flotation deinking machine for flotation deinking;

Preliminary concentration, the deinked slurry is pre-dehydrated through a non-powered pre-concentration device, and the wastewater and slurry are separated, so that the concentration of the pre-dehydrated slurry reaches 1%-3%;

Concentrate again, use a high-speed pulp washer to further dehydrate the slurry, further separate the wastewater and the slurry, and make the slurry concentration reach 15%;

Wastewater deinking and degumming, the wastewater collected during the initial concentration and re-concentration process is deinked and degummed by the wastewater deinking and degumming machine, and the ink and stickies are discharged to obtain white water containing chemicals, heat and fibers;

The white water is recycled and reused, and the white water is respectively sent to the pulping, filtering, dilution and flotation deinking steps to continue to be recycled.

As a further improvement, the pre-concentration device includes an inclined net, the inclined net is fixedly installed on the frame, and several scrapers are arranged on the back of the inclined net, the blades of the scrapers are against the inclined net and The installation direction of the blade is opposite to the flow direction of the slurry.

As a further improvement, the waste water deinking and degumming machine includes a deinking and degumming machine housing, a flotation chamber and a slag discharge chamber are arranged in the deinking and degumming machine housing, and the flotation chamber communicates with the slag discharge chamber , the slag discharge chamber is located below the flotation chamber, at least one layer of aeration device is provided in the flotation chamber, and the deinking and degumming machine housing above the aeration device is provided with a The waste water inlet connected to the flotation chamber, the deinking and degumming machine housing corresponding to the flotation chamber below the aeration device is provided with a white water outlet, and the deinking and degumming corresponding to the slag discharge chamber The casing of the machine is conical, the bottom of the slag discharge chamber is provided with a slag discharge port, and the casing of the deinking and degumming machine is also provided with an ink discharge port.

After adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

Due to the addition of the two manufacturing process steps of waste water deinking and degumming and white water recycling in the waste paper deinking process, not only energy is greatly saved, the chemicals and energy in papermaking wastewater are recycled and reused, but also waste In the paper deinking process, zero discharge of wastewater is realized, which greatly protects the environment, saves energy and protects the environment, and also greatly reduces the cost of wastewater treatment, and the cost of papermaking is greatly reduced.

Because the preliminary concentration step is added in the process steps, and no power is used in the concentration step, the energy consumption is greatly reduced, the structure is simple, the operation is convenient, and the cost of papermaking is further reduced, which is economical and reasonable.

Due to the addition of water dilution, the concentration of the slurry is 0.5%-0.7% before flotation deinking, which not only achieves the best concentration of flotation deinking, greatly improves the effect of flotation deinking, but also improves the papermaking quality and production efficiency.

In addition, another technical problem to be solved by the present invention is to provide a waste paper deinking equipment to solve the technical problems of high energy consumption, environmental pollution and high paper production cost during the use of existing papermaking equipment.

As far as the waste paper deinking equipment is concerned, the present invention is realized in this way, a waste paper deinking equipment includes sequentially arranged

A pulper for mixing waste paper, water and chemicals to make a pulp;

Sieving machine for filtering impurities in pulp;

Dilution unit for adding water to the slurry for dilution;

Flotation deinking machine for slurry deinking;

Pre-thickening device for primary dehydration of slurry;

High-speed pulp washer for further dehydration of pulp;

A wastewater deinking and degumming machine for deinking and degumming the collected wastewater;

The white water obtained after deinking and degumming of waste water is transported to the recycling device of the pulper, sieving machine, dilution device or flotation deinking machine respectively, and the recycling device includes a power pump connected to the white water outlet, so The power pump is connected to the branch pipelines respectively connected to the pulper, the sieving machine, the dilution device and the flotation deinking machine, and flow control valves are arranged on the branch pipelines.

As a further improvement, the pre-concentration device includes an inclined net, the inclined net is fixedly installed on the frame, and several scrapers are arranged on the back of the inclined net, the blades of the scrapers are against the inclined net and The installation direction of the blade is opposite to the flow direction of the slurry.

As a further improvement, the wastewater deinking and degumming device includes a deinking and degumming machine housing, a flotation chamber and a slag discharge chamber are arranged inside the deinking and degumming machine housing, and the flotation chamber communicates with the slag discharge chamber , the slag discharge chamber is located below the flotation chamber, at least one layer of aeration device is provided in the flotation chamber, and the deinking and degumming machine housing above the aeration device is provided with a The water inlet connected to the flotation chamber, the deinking and degumming machine housing corresponding to the flotation chamber below the aeration device is provided with a white water outlet, and the deinking and degumming machine corresponding to the slag discharge chamber The shell is conical, and the bottom of the slag discharge chamber is provided with a slag discharge port, and the shell of the deinking and degumming machine is also provided with an ink discharge port.

As a further improvement, the top of the shell of the deinking and degumming machine has an ink collection tank, the ink collection tank communicates with the flotation chamber, and the ink discharge port is arranged on the deinking tank above the aeration device. On the casing of the ink degumming machine, and the ink discharge port communicates with the ink collection tank.

As a further improvement, the housing of the deinking and degumming machine is fixed with an ink guide tube, and the upper end of the ink guide tube is provided with an ink collection port, and the ink collection port is located above the flotation chamber. The ink guide pipe is connected with the ink discharge port, the ink guide pipe extends out of the deinking and degumming machine housing corresponding to the slag discharge chamber, and the ink discharge port is located at the deinking and degumming machine housing external.

As a further improvement, the ink discharge port includes a first ink discharge port and a second ink discharge port; the top of the deinking and degumming machine housing has an ink collection tank, and the ink collection tank communicates with the flotation chamber , the first ink discharge port is arranged on the deinking and degumming machine housing above the aeration device, and the first ink discharge port communicates with the ink collection tank;

In the housing of the deinking and degumming machine, an ink guide tube is fixedly arranged, and an ink collecting port is arranged at the upper end of the ink guiding tube, and the ink collecting port is located above the flotation chamber. Connected with the second ink discharge port, the ink guide pipe extends out of the deinking and degumming machine housing corresponding to the slag discharge chamber, and the second ink discharge port is located outside the deinking and degumming machine housing .

As a further improvement, one side of the housing of the deinking and degumming machine is provided with a high-level water tank for adjusting the liquid level in the housing of the deinking and degumming machine, and the water inlet of the high-level water tank is communicated with the white water outlet through a pipeline , the water outlet of the high level water tank is connected with the power pump.

After adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

Due to the use of waste water deinking and degumming machine, the waste water generated during the deinking process of waste paper is deinked and degummed, and turned into white water containing heat and remaining chemicals, and then re-transmitted to other equipment for waste paper deinking to continue circulation Reuse, this not only reduces the amount of water and chemicals used in the pulping process, reduces the cost of resource use, but also realizes waste water recycling, that is, zero discharge of waste water, which greatly protects the environment, is economical and practical, and is environmentally friendly and energy-saving.

Because the pre-thickening device is an inclined wire that does not consume power, it greatly reduces the energy consumption in the production process, and also reduces the cost of papermaking, and is easy to use and operate.

Since the dilution device is used in the flotation deinking equipment, the concentration of the slurry can be diluted to the optimum concentration required for flotation deinking, so that the best deinking effect can be achieved. The power delivered by the pump has low energy consumption. The equipment has a simple structure, takes up little space, and is easy to use.

Since the flotation deinking machine includes a deinking machine shell, there is a multi-layer aeration device inside the deinking machine shell, and the aeration device is connected to the air source. The setting of the air device can further increase the flotation deinking effect and improve the deinking efficiency.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 3 is a schematic structural view of Embodiment 3 of the present invention;

Fig. 4 is a schematic structural view of Embodiment 4 of the present invention;

In the figure: 1. Pulper, 11. Pulper inlet, 12. Pulper outlet, 13. Pulper water inlet, 2. Sieving machine, 21. Sieving machine water inlet, 3. Flotation deinking machine, 30, deinking machine shell, 31, flotation deinking machine pulp inlet, 32, ink discharge port, 33, aeration device, 34, flotation deinking machine pulp outlet, 35, Fan, 36, water inlet of flotation deinking machine, 4, dilution device, 41, water inlet of dilution device, 5, pre-concentration device, 51, inclined screen, 52, frame, 53, scraper, 54, overflow tank, 55, pulp inlet, 56, sump, 57, inclined net wastewater outlet, 58, inclined net pulp outlet, 6, high-speed pulp washer, 61, second wastewater outlet, 62, high-speed pulp washer pulp inlet, 7. Waste water deinking and degumming machine, 71. Shell of deinking and degumming machine, 72. Flotation chamber, 73. Slag discharge chamber, 74. Waste water inlet, 75. First ink discharge port, 76. Second ink discharge port , 77, white water outlet, 78, slag discharge port, 79, aeration device, 80, ink collection tank, 81, ink diversion pipe, 82, fan, 83, control valve, 84, high water tank, 841, high water tank inlet Nozzle, 842, water outlet of high level water tank, 8, circulating water pipe, 85, ink collecting port, 9, power pump, 10, inner cylinder, 11, outlet of suspended matter.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The invention discloses a waste paper deinking process, which comprises the following steps implemented in sequence:

Pulping, mixing waste paper, water and chemicals to make a slurry;

Filtration to remove impurities in the slurry;

Dilution, adding water to the slurry to dilute the slurry concentration to 0.5%-0.7%;

Flotation deinking, the slurry is transported to the flotation deinking machine for flotation deinking;

Preliminary concentration, the deinked slurry is pre-dehydrated through a non-powered pre-concentration device, and the wastewater and slurry are separated, so that the concentration of the pre-dehydrated slurry reaches 1%-3%;

Concentrate again, use a high-speed pulp washer to further dehydrate the slurry, further separate the wastewater and the slurry, and make the slurry concentration reach 15%;

Wastewater deinking and degumming, the wastewater collected during the initial concentration and re-concentration process is deinked and degummed by the wastewater deinking and degumming machine, and the ink and stickies are discharged to obtain white water containing chemicals and heat;

The white water is recycled and reused, and the white water is respectively sent to the pulping, filtering, dilution and flotation deinking steps to continue to be recycled.

The pre-concentration device 5 includes an inclined net 51, which is fixedly installed on the frame 52, and the back side of the inclined net 51 is provided with some scrapers 53, the blades of the scrapers 53 are against the inclined net 51 and the installation direction of the blades is the same as that of the pulp. The flow direction of the body is reversed.

The waste water deinking and degumming machine includes a deinking and degumming machine housing 71, which is provided with a flotation chamber 72 and a slag discharge chamber 73, the flotation chamber 72 communicates with the slag discharge chamber 73, and the slag discharge chamber 73 is located in Below the flotation chamber 72, at least one layer of aeration device 79 is provided in the flotation chamber 72, and the deinking and degumming machine housing 71 above the aeration device 79 is provided with a waste water inlet 74 communicating with the flotation chamber 72 , the deinking and degumming machine housing 71 corresponding to the flotation chamber 72 below the aeration device 79 is provided with a white water outlet 77, and the deinking and degumming machine housing 71 corresponding to the slag discharge chamber 73 is conical, and the slag discharge chamber 73 A slag discharge port 78 is provided at the bottom, and an ink discharge port is also provided on the housing 71 of the deinking and degumming machine.

The waste water deinking production process of the present invention has low energy consumption in the whole process, saves energy, realizes zero discharge of waste water, is economical and environmentally friendly, has a simple structure and is easy to operate.

Embodiment one:

As shown in Figure 1, the present invention also discloses a waste water deinking equipment, which includes sequentially arranged

Pulper 1 for mixing and crushing waste paper, water and chemicals to make slurry;

Sieving machine 2 for filtering impurities in pulp;

Dilution device 4 for adding water to the slurry for dilution;

Flotation deinking machine 3 for slurry deinking;

Pre-concentration device 5 for preliminary dehydration of slurry;

High-speed pulp washer 6 for further dehydration of pulp;

A wastewater deinking and degumming machine 7 for deinking and degumming the collected wastewater.

The white water obtained after deinking and degumming of waste water is transported to the recycling device of the pulper 1, the sieving machine 2, the dilution device 4 or the flotation deinking machine 3 respectively, and the recycling device includes the power connected to the white water outlet 77 The pump 9 and the power pump 9 are connected to the branch pipelines respectively connecting the pulper 1, the sieving machine 2, the dilution device 4 and the flotation deinking machine 3, and flow control valves are arranged on the branch pipelines.

The pre-concentration device 5 includes an inclined net 51, which is fixedly installed on the frame 52, and the back side of the inclined net 51 is provided with some scrapers 53, the blades of the scrapers 53 are against the inclined net 51 and the installation direction of the blades is the same as that of the pulp. The flow direction of the body is reversed.

The waste water deinking and degumming machine includes a deinking and degumming machine housing 71, which is provided with a flotation chamber 72 and a slag discharge chamber 73, the flotation chamber 72 communicates with the slag discharge chamber 73, and the slag discharge chamber 73 is located in Below the flotation chamber 74, at least one layer of aeration device 79 is provided in the flotation chamber 74, and the deinking and degumming machine housing 71 above the aeration device 79 is provided with a waste water inlet 74 communicating with the flotation chamber 72 , the deinking and degumming machine housing 71 corresponding to the flotation chamber 72 below the aeration device 79 is provided with a white water outlet 77, and the deinking and degumming machine housing 71 corresponding to the slag discharge chamber 73 is conical, and the slag discharge chamber 73 A slag discharge port 78 is provided at the bottom, and an ink discharge port is also provided on the housing 71 of the deinking and degumming machine.

The top of the deinking and degumming machine housing 71 has an ink collection tank 80, the ink collection tank 80 communicates with the flotation chamber 72, the ink discharge port is arranged on the deinking and degumming machine housing 71 above the aeration device 79, and the ink discharge port It communicates with the ink collection tank 80 .

One side of the deinking and degumming machine housing 71 is provided with a high-level water tank 84 for adjusting the liquid level in the deinking and degumming machine housing 71, the high-level water tank water inlet 841 communicates with the white water outlet 77 through a pipeline, and the high-level water tank water outlet 842 It communicates with the circulating water pipe 8.

The circulating water pipe 8 communicates with the water inlet 13 of the pulper, the water inlet 21 of the sieving machine, the water inlet 41 of the dilution device and the water inlet 36 of the flotation deinking machine respectively.

The waste water inlet 74 is provided with a jet.

The water inlet direction of the waste water inlet 74 is along the tangential direction of the shell 71 of the deinking and degumming machine.

The water inlet direction of the waste water inlet 74 is along the radial direction of the shell 71 of the deinking and degumming machine.

When in use, the pulper 1 can use a high-concentration hydraulic pulper. First, the high-concentration hydraulic pulper is used to form a strong hydraulic impact and shearing action in the body, and then the chemical reaction of the chemical agent is used to achieve the purpose of pulping. The waste paper is turned into slurry, and then transported to the sieving machine 2. The sieving machine 2 can use a hole sieving sieve machine to filter impurities in the slurry. After filtering the impurities, the slurry is passed into the dilution device 4. Dilute the water to make the slurry concentration reach 0.5%-0.7%, which is the best flotation deinking concentration, and then transport it into the flotation deinking machine 3 for deinking of the slurry. The slurry is first transported to the inclined net 51 for preliminary dehydration. At this time, the scraper 53 on the back of the inclined net 51 can play the role of auxiliary water filtration. The concentration of the slurry after the preliminary water filtration can reach 1%-1.5%. The water directly enters the waste water deinking and degumming machine 7 through the pipeline for treatment, and then the slurry is further dehydrated with high efficiency. At this time, the concentration can reach 10%, and the water removed during this process also enters the waste water deinking and degumming machine 7. For treatment, the waste water produced in the above two devices all enters the waste water deinking and degumming machine 7, there is no discharge of any sewage in the production process, and zero discharge of sewage is achieved. The waste water treated by the waste water deinking and degumming machine 7 becomes containing residual After the white water of chemical agent, heat and fiber etc. is transported back to the pulper water inlet 13, the screen machine water inlet 21, the dilution device water inlet 41 and the flotation deinking machine water inlet 36, continue to recycle;

When the above-mentioned wastewater deinking and degumming machine is in use, the pulp wastewater enters from the wastewater inlet 74, and can adopt tangential water inlet or water inlet along the radial direction. The pulp wastewater entering the deinking and degumming machine housing 71 will first reach the floating In the selected chamber 72, then carry out flotation deinking through the multi-layer aeration device 79 in the flotation chamber, a large number of microbubble groups produced by the aeration device 79 will absorb ink and stickies in the pulp wastewater on a large scale, and then As the bubble group rises, it directly reaches the ink collection tank 80, and finally discharges the deinking and degumming machine housing 71 from the ink discharge port above the aeration device 79, and the waste sludge deposited in the pulp will reach the slag discharge chamber 73 After reaching a certain amount, directly open the control valve 83 at the slag outlet 78 to discharge the sludge;

After the above-mentioned deinking and degumming and draining of the precipitated sludge, only the chemicals added in the pulp and papermaking, a large amount of heat and fibers will remain in the pulp wastewater, and the pulp wastewater will become white water, which will be directly discharged from the white water outlet 77 to the pulp processing In the process production equipment, recycling is carried out again, which greatly reduces the cost of papermaking, with low energy consumption and high efficiency.

In the above whole process, the number of equipment used is small, the energy consumption is low, the energy is saved, the use is convenient, the structure is simple, and it is economical and practical.

Embodiment two:

The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that, in another wastewater deinking and degumming machine shown in FIG. The upper end of the ink guide tube 81 is provided with an ink collecting port 85, the ink collecting port 85 is located above the flotation chamber 72, the ink guide tube 81 communicates with the second ink discharge port 76, and the ink guide tube 81 extends out of the slag discharge chamber 73 corresponds to the housing 71 of the deinking and degumming machine, and the second ink outlet 76 is located outside the housing 71 of the deinking and degumming machine.

During use, the ink and stickies produced by flotation directly enter the ink collection port 85, then flow along the ink conduit flow 81 to the second ink discharge port 76, and are directly discharged from the deinking and degumming machine housing 71.

Embodiment three:

The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that, in another waste water deinking and degumming machine shown in FIG. 3 , the ink discharge port includes a first ink discharge port 75 and a second ink discharge port 76 There is an ink collecting tank 80 at the top of the deinking and degumming machine housing 71, the ink collecting tank 80 communicates with the first ink outlet 75, and the first ink discharge port 75 is arranged on the deinking and degumming machine housing 71 above the aeration device 79 , the ink collection tank 80 is also communicated with the flotation chamber 72;

The deinking and degumming machine housing 71 is fixedly provided with an ink guide tube 81, and the upper end of the ink guide tube 81 is provided with an ink collection port 85, and the ink collection port 85 is positioned above the flotation chamber 72, and the ink guide tube 81 and the second The second ink discharge port 76 is connected, the ink guide pipe 81 extends out of the deinking and degumming machine housing 71 corresponding to the slag discharge chamber 73 , and the second ink discharge port 76 is located outside the deinking and degumming machine housing 71 .

During use, the ink and stickies produced by flotation can not only be directly discharged from the first ink discharge port 75 through the ink collection tank 80, but also be discharged from the ink flow guide tube 81 to the second ink discharge port 76. It not only greatly improves the efficiency of ink discharge, but also improves the efficiency of flotation. The structure is simple and easy to use.

Above-mentioned blower fan 82 provides air source to aeration device 79 .

The white water outlet 77 communicates with the high-level water tank 84, so that the water level in the deinking and degumming machine housing 71 can be adjusted through the weir plate in the high-level water tank 84, so as to control the liquid level and ensure the effect of flotation.

Embodiment four:

The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that, in another waste water deinking and degumming machine as shown in FIG. The inner cylinder 10 of the machine housing 71.

The inner cylinder 10 has a tapered structure with a large top and a small bottom. The large end and the small end of the inner cylinder 10 are closed. The large end of the inner cylinder 10 is fixedly connected to the top inner wall of the deinking and degumming machine shell 71. The deinking and degumming machine shell The top of the body 71 is provided with a number of suspended matter outlets 11, the suspended matter outlets 11 are located outside the large end of the inner cylinder 10 and correspond to the position of the outer wall of the inner cylinder 10 large end.

During use, the suspended matter floating up from the deinking and degumming machine housing 71 can flow to the suspended matter outlet 11 at the top of the deinking and degumming machine housing 71 along the outer wall of the closed inner cylinder 10, and then be discharged to the deinking and degumming machine. Outside the shell 71, the structure is simple, and the diversion effect is good.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. waste paper deinking process is characterized in that, comprises the following steps of implementing successively: (1) Pulping, mixing waste paper, water and chemicals to make a slurry; (2) Filtration to remove impurities in the slurry; (3) Dilution, adding water to the slurry to dilute the slurry concentration to 0.5%-0.7%; (4) Flotation deinking, the slurry is transported to the flotation deinking machine for flotation deinking; (5) Preliminary concentration, the deinked slurry is pre-dehydrated through a non-powered pre-concentration device, and the wastewater and slurry are separated, so that the concentration of the pre-dehydrated slurry reaches 1%-3%; (6) Concentrate again, use a high-speed pulp washer to further dehydrate the slurry, and further separate the wastewater and slurry, so that the concentration of the slurry reaches 15%; (7) Wastewater deinking and degumming, the wastewater collected during the initial concentration and re-concentration process is deinked and degummed by the wastewater deinking and degumming machine, and the ink and stickies are discharged to obtain white water containing chemicals, heat and fibers ; (8) The white water is recycled and reused, and the white water is sent to the steps of pulping, filtering, dilution and flotation deinking to continue to be recycled. 2. The waste paper deinking process according to claim 1, characterized in that, the pre-concentration device includes an inclined net, the inclined net is fixedly installed on the frame, and a plurality of scrapers are arranged on the back of the inclined net , the blade of the scraper abuts against the inclined net and the installation direction of the blade is opposite to the flow direction of the slurry. 3. The waste paper deinking process according to claim 1, characterized in that, the waste water deinking and degumming machine comprises a deinking and degumming machine housing, and the deinking and degumming machine housing is provided with a flotation chamber and a slag discharge chamber, the flotation chamber communicates with the slag discharge chamber, the slag discharge chamber is located below the flotation chamber, at least one layer of aeration device is provided in the flotation chamber, and the aeration device is located The deinking and degumming machine housing above is provided with a wastewater inlet connected to the flotation chamber, and the deinking and degumming machine housing corresponding to the flotation chamber below the aeration device is provided with There is a white water outlet, and the shell of the deinking and degumming machine corresponding to the slag discharge chamber is conical. 4. Waste paper deinking equipment, characterized in that it includes sequentially arranged A pulper for mixing waste paper, water and chemicals to make a pulp; Sieving machine for filtering impurities in pulp; Dilution unit for adding water to the slurry for dilution; Flotation deinking machine for slurry deinking; Pre-thickening device for primary dehydration of slurry; High-speed pulp washer for further dehydration of pulp; A wastewater deinking and degumming machine for deinking and degumming the collected wastewater; The white water obtained after deinking and degumming of waste water is transported to the recycling device of the pulper, sieving machine, dilution device or flotation deinking machine respectively, and the recycling device includes a power pump connected to the white water outlet, so The power pump is connected to the branch pipelines respectively connected to the pulper, the sieving machine, the dilution device and the flotation deinking machine, and flow control valves are arranged on the branch pipelines. 5. The waste paper deinking equipment according to claim 4, characterized in that, the pre-concentration device comprises a slanting net, the slanting net is fixedly installed on the frame, and a plurality of scrapers are arranged on the back of the slanting net , the blade of the scraper abuts against the inclined net and the installation direction of the blade is opposite to the flow direction of the slurry. 6. The waste paper pulp deinking equipment according to claim 4, characterized in that, the waste water deinking and degumming machine comprises a deinking and degumming machine housing, and the deinking and degumming machine housing is provided with a flotation chamber and a slag discharge chamber, the flotation chamber communicates with the slag discharge chamber, the slag discharge chamber is located below the flotation chamber, at least one layer of aeration device is provided in the flotation chamber, and the aeration device is located The deinking and degumming machine housing above is provided with a wastewater inlet connected to the flotation chamber, and the deinking and degumming machine housing corresponding to the flotation chamber below the aeration device is provided with There is a white water outlet, and the shell of the deinking and degumming machine corresponding to the slag discharge chamber is conical. 7. The waste paper pulp deinking equipment according to claim 6, characterized in that, the top of the housing of the deinking and degumming machine has an ink collection tank, the ink collection tank communicates with the flotation chamber, and the drain The ink port is arranged on the shell of the deinking and degumming machine above the aeration device, and the ink discharge port communicates with the ink collection tank. 8. waste paper pulp deinking equipment according to claim 6, is characterized in that, the described deinking and degumming machine housing is fixedly provided with ink guide tube, and the upper end of described ink guide tube is provided with ink collecting port, and The ink collection port is located above the flotation chamber, the ink guide tube is connected to the ink discharge port, and the ink guide tube extends out of the deinking and degumming machine housing corresponding to the slag discharge chamber, so The ink outlet is located outside the housing of the deinking and degumming machine. 9. The waste paper pulp deinking equipment according to claim 6, wherein the ink discharge port includes a first ink discharge port and a second ink discharge port; the top of the deinking and degumming machine housing has an ink collection tank, the ink collection tank communicates with the flotation chamber, the first ink discharge port is arranged on the deinking and degumming machine housing above the aeration device, and the first ink discharge port is connected to the The ink collection tank is connected; In the housing of the deinking and degumming machine, an ink guide tube is fixedly arranged, and the upper end of the ink guide tube is provided with an ink collecting port, and the ink collecting port is located above the flotation chamber, and the ink guide tube It communicates with the second ink discharge port, the ink guide pipe extends out of the deinking and degumming machine shell corresponding to the slag discharge chamber, and the second ink discharge port is located outside the deinking and degumming machine shell . 10. The waste paper deinking equipment according to any one of claims 6 to 9, wherein one side of the housing of the deinking and degumming machine is provided with a device for adjusting the liquid level in the housing of the deinking and degumming machine. High and low high-level water tanks, the water inlet of the high-level water tank communicates with the white water outlet through a pipeline, and the water outlet of the high-level water tank is connected with the power pump.

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