CN212505598U

CN212505598U - White water recovery system of deinking line

Info

Publication number: CN212505598U
Application number: CN202020910789.5U
Authority: CN
Inventors: 李健
Original assignee: Nine Dragons Paper Holdings Ltd
Current assignee: Nine Dragons Paper Holdings Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-02-09
Anticipated expiration: 2030-05-26

Abstract

The utility model provides a plain boiled water recovery system of deinking line, the system include slag groove, inclined screen, plain boiled water collecting vat, sediment thick liquid collecting vat, the slag groove be used for collecting the tail thick liquid, the tail thick liquid of slag inslot be carried extremely the inclined screen, the inclined screen be used for filtering the tail thick liquid, get into through the filterable plain boiled water of inclined screen the plain boiled water collecting vat, fail to pass through the sediment of the screen cut of inclined screen get into the sediment thick liquid collecting vat. The utility model discloses a white water recovery system of deinking line concentrates the system tailings, and the reuse of white water system after the concentration, the tailings are arranged outward, guarantee system cleanliness factor.

Description

White water recovery system of deinking line

Technical Field

The utility model relates to a papermaking field, concretely relates to plain boiled water recovery system of deinking line.

Background

The deinking line of office waste paper has high requirement on the quality of finished pulp, and the discharge amount of tailings is controlled to be a certain amount and cannot be too small to ensure the whiteness and the cleanliness of the pulp. This results in an unbalanced white water system. And the temperature of the system is low due to the supplement of clean water, and the steam consumption is increased to ensure the bleaching process, so that the energy waste is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a plain boiled water recovery system of deinking line.

In order to solve the technical problem, the utility model provides a plain boiled water recovery system of deinking line, the system include slag chute, inclined screen, plain boiled water collecting vat, sediment thick liquid collecting vat, the slag chute be used for collecting the tail stock, the tail stock of slag chute in be carried extremely the inclined screen, the inclined screen be used for filtering the tail stock, get into through the filterable plain boiled water of inclined screen the plain boiled water collecting vat, fail to pass through the sediment of the screen cut of inclined screen get into the sediment thick liquid collecting vat.

Preferably, the system further comprises an air flotation machine, the air flotation machine is communicated with the white water collecting tank, and the air flotation machine is used for treating the white water in the white water collecting tank.

Preferably, the system further comprises a pulping white water tower, the pulping white water tower is communicated with the air flotation machine, and the pulping white water tower is used for recovering white water treated by the air flotation machine.

Preferably, the system further comprises an ash bottom white board slurry line, the ash bottom white board slurry line is communicated with the slag slurry collecting tank, and the ash bottom white board slurry line is used for recovering slag in the slag slurry collecting tank.

Preferably, a first pump is arranged between the slag groove and the inclined screen, and the first pump is used for conveying tail slurry in the slag groove to the inclined screen.

Preferably, a second pump is further disposed between the white water collecting tank and the air flotation machine, and the second pump is used for conveying the white water in the white water collecting tank to the air flotation machine.

Preferably, a third pump is arranged between the slag slurry collecting tank and the ash bottom white board slurry line, and the third pump is used for conveying slag in the slag slurry collecting tank to the ash bottom white board slurry line.

Preferably, the slag tank is used for connecting a deinking line sieve and a desander, and tail pulp in the deinking line sieve and the desander is collected into the slag tank.

The utility model discloses a white water recovery system of deinking line concentrates the system tailings, and the reuse of white water system after the concentration, the tailings are arranged outward, guarantee system cleanliness factor.

Drawings

Fig. 1 is a schematic view of a flow structure of a white water recovery system of a deinking line according to the present application.

Wherein: 1. a slag groove; 2. screening obliquely; 3. a white water collecting tank; 4. an air flotation machine; 5. a slurry collection box; 6. a pulping white water tower; 7. a grey-bottom white board slurry line; 8. a first pump; 9. a second pump; 10. and a third pump.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1, the utility model provides a plain boiled water recovery system of deinking line, the system include slag chute, inclined screen, plain boiled water collecting vat, sediment thick liquid collecting vat, the slag chute be used for collecting the tail stock, the tail stock of slag chute in be carried extremely the inclined screen, the inclined screen be used for filtering the tail stock, the filterable plain boiled water of process inclined screen gets into plain boiled water collecting vat, does not pass through the sediment of the screen cut of inclined screen get into the sediment thick liquid collecting vat. The system also comprises an air flotation machine, the air flotation machine is communicated with the white water collecting tank, and the air flotation machine is used for treating the white water in the white water collecting tank. The system also comprises a pulping white water tower, the pulping white water tower is communicated with the air flotation machine, and the pulping white water tower is used for recovering white water treated by the air flotation machine. The system also comprises an ash bottom white board slurry line, wherein the ash bottom white board slurry line is communicated with the slag slurry collecting tank, and the ash bottom white board slurry line is used for recovering slag in the slag slurry collecting tank. The slag tank is used for connecting a deinking line sieve and a desander, and tail pulp in the deinking line sieve and the desander is collected into the slag tank. The utility model discloses a white water recovery system of deinking line concentrates the system tailings, and the reuse of white water system after the concentration, the tailings are arranged outward, guarantee system cleanliness factor.

And a first pump is arranged between the slag groove and the inclined screen and is used for conveying tail slurry in the slag groove to the inclined screen. A second pump is arranged between the white water collecting tank and the air flotation machine and is used for conveying the white water in the white water collecting tank to the air flotation machine. And a third pump is arranged between the slag slurry collecting tank and the ash bottom white board slurry line, and is used for conveying slag in the slag slurry collecting tank to the ash bottom white board slurry line.

The following is a specific application of one embodiment of the white water recovery system of the deinking line of the present application. The average temperature in the local year is about 17.5 ℃, and the normal temperature water is heated to 52 ℃ with the temperature difference of 34.5 ℃. Recovering the heat of the white water: 120m³0.5 x 1000 x 24h 300 days 4.2 x 1000J/kg ℃34.5 ℃ 6.25968 x 10¹³J/year, according to one ton steam heat 2.95757 × 10⁶KJ calculation, one year corresponds to steam savings of 6.25968 × 10¹³/2.95757*10⁹21164.94 tons, 120m of clean water is saved each year³0.5 x 24h 300 days 432000 tons. Therefore, the white water recovery system can save a large amount of clear water, is beneficial to environmental protection and can save production cost.

The above-mentioned embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. The white water recovery system of the deinking line is characterized by comprising a slag groove, an inclined screen, a white water collecting groove and a slag pulp collecting groove, wherein the slag groove is used for collecting tail pulp, the tail pulp in the slag groove is conveyed to the inclined screen, the inclined screen is used for filtering the tail pulp, the white water filtered by the inclined screen enters the white water collecting groove, and the slag which does not pass through a screen slot of the inclined screen enters the slag pulp collecting groove.

2. The white water recovery system of claim 1, further comprising an air flotation machine in communication with the white water collection tank, the air flotation machine for treating white water in the white water collection tank.

3. The white water recovery system of claim 2, further comprising a pulp making white water tower, wherein the pulp making white water tower is communicated with the air flotation machine, and the pulp making white water tower is used for recovering the white water treated by the air flotation machine.

4. The white water recovery system of claim 1, further comprising an ash bottom white board pulp line in communication with the slag pulp collection tank, the ash bottom white board pulp line for recovering slag from the slag pulp collection tank.

5. The white water recovery system of claim 1, wherein a first pump is disposed between the slag trough and the inclined screen, and the first pump is used for conveying the tail stock in the slag trough to the inclined screen.

6. The white water recovery system of claim 2, wherein a second pump is disposed between the white water collecting tank and the air flotation machine, and the second pump is used for conveying the white water in the white water collecting tank to the air flotation machine.

7. The white water recovery system of claim 4, wherein a third pump is disposed between the slag slurry collection tank and the whiteboard slurry line, and the third pump is used for conveying the slag in the slag slurry collection tank to the whiteboard slurry line.

8. The white water recovery system of claim 1, wherein the slag trough is used to connect a deinking line screen and a grit catcher, and tail pulp in the deinking line screen and the grit catcher is collected in the slag trough.