Steam recycling system for hot pulping line

Abstract

The utility model discloses a steam recycling system for a hot pulping line. The steam recycling system comprises a steam pipeline, a first scrubber, a water pipe and a collecting tank, the first scrubber is provided with a first steam inlet connecting pipe, a first spraying connecting pipe, a first gas phase outlet pipeline, a first liquid phase outlet pipeline and a first blow-off pipe; the steam pipeline is connected to the first steam inlet connecting pipe; the water pipe is connected to the first spraying connecting pipe; the first blow-off pipe is connected to the collecting tank; the first liquid phase outlet pipeline is provided with a circulating pump, an outlet pipeline of the circulating pump is provided with a circulating pipe, and the circulating pipe is connected to the first steam inlet connecting pipe. The technical scheme provided by the utility model is used for separating steam with a small amount of pulp from the hot pulping line cyclone separator, so that the steam is recycled, the environment is not polluted, and the aims of energy conservation, emission reduction and green production are fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a steam recovery and utilization system for a hot pulping line. Background Art

[0002] During the pulping process of hot pulping, high-temperature pulp is sprayed out from the hot mill under high pressure, and the steam and pulp are separated by a cyclone separator. The steam with a small amount of pulp is discharged to the outside, which will cause a large waste of steam and pollute the surrounding atmosphere. In view of the above technical problems, this application proposes a new technical solution for recycling the steam separated by the cyclone separator of the hot pulping line, thereby greatly reducing the steam consumption, reducing the pulping cost, and solving the pollution problem. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a steam recovery system for a hot pulping line, aiming to solve the technical problem in the prior art that the steam separated by the cyclone separator of the hot pulping line cannot be recovered and utilized and pollutes the environment.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A steam recovery and utilization system for a hot pulping line comprises a steam pipeline, a first scrubber, a water pipe, and a collecting tank; the first scrubber is provided with a first steam inlet connecting pipe, a first spray connecting pipe, a first gas phase outlet pipeline, a first liquid phase outlet pipeline, and a first sewage pipe; the steam pipeline is connected to the first steam inlet connecting pipe; the water pipe is connected to the first spray connecting pipe; the first sewage pipe is connected to the collecting tank; the first liquid phase outlet pipeline is provided with a circulating pump, the outlet pipeline of the circulating pump is provided with a circulating pipe, and the circulating pipe is connected to the first steam inlet connecting pipe.

[0006] Furthermore, the steam recovery and utilization system for the hot pulping line also includes a second scrubber, which is provided with a second steam inlet connecting pipe, a second spray connecting pipe, a second gas phase outlet pipe, and a second liquid phase outlet pipe; the steam pipe is provided with a steam branch pipe, which is connected to the second steam inlet connecting pipe; the water pipe is provided with a first bypass pipe, which is connected to the second spray connecting pipe; the second liquid phase outlet pipe is connected to the collecting tank.

[0007] Furthermore, in the steam recovery system for the hot pulping line, the water pipe is provided with a second bypass pipe, and the second bypass pipe is connected to the second steam inlet pipe.

[0008] Furthermore, in the steam recovery and utilization system for the hot pulping line, the collection tank is a water seal tank, and the water inlet pipe of the water seal tank is connected to the water pipe.

[0009] Furthermore, in the steam recovery and utilization system for the hot pulping line, a first spray water valve is provided upstream of the first spray pipe, and a second spray water valve is provided upstream of the second spray pipe.

[0010] Beneficial effects: The utility model provides a steam recovery and utilization system for a hot pulping line. Compared with the prior art, the utility model provides a first scrubber, a circulation pump, a collecting tank and other structures to separate the steam with a small amount of pulp coming out of the hot pulping line cyclone separator, and can send the separated waste to the collecting tank for further centralized treatment, thereby realizing the recovery and utilization of steam without polluting the environment, achieving the purpose of energy conservation, emission reduction and green production. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a working principle diagram of the steam recovery and utilization system for a hot pulping line provided by the utility model. DETAILED DESCRIPTION

[0012] The utility model provides a steam recovery system for a hot pulping line. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0013] See also Figure 1 The utility model provides a steam recovery system for a hot pulping line. The accompanying drawings are only used to explain the structural principles and are not proportional to the actual products. The accompanying drawings only show the structures related to the invention of this application, and some conventional structures are not specifically drawn. Some valves are schematically drawn in the figure (not all valves are drawn). Since the valves are not the invention point, the valves are not explained in detail. The terms "first", "second", etc. described in this article are merely different names for similar structures for the convenience of explanation, and are not intended to limit this application.

[0014] The steam recovery and utilization system for the hot pulping line includes a steam pipe 9, a first scrubber 1, a water pipe 8, and a collecting tank 3; the first scrubber is provided with a first steam inlet connecting pipe 11, a first spray connecting pipe 12, a first gas phase outlet pipe 13, a first liquid phase outlet pipe 14, and a first sewage pipe 15; the steam pipe 9 is connected to the first steam inlet connecting pipe; the water pipe 8 is connected to the first spray connecting pipe; the first sewage pipe is connected to the collecting tank; the first liquid phase outlet pipe is provided with a circulating pump 4, and the outlet pipe 42 of the circulating pump is provided with a circulating pipe 421, which is connected to the first steam inlet connecting pipe.

[0015] Furthermore, the steam recovery and utilization system for the hot pulping line also includes a second scrubber 2, which is provided with a second steam inlet pipe 21, a second spray pipe 22, a second gas phase outlet pipe 23, and a second liquid phase outlet pipe 24; the steam pipe 9 is provided with a steam branch pipe 91, which is connected to the second steam inlet pipe; the water pipe 8 is provided with a first bypass pipe 81, which is connected to the second spray pipe; and the second liquid phase outlet pipe is connected to the collection tank. By providing the second scrubber and other structures, it is convenient to further improve the processing capacity of the steam recovery and utilization system for the hot pulping line.

[0016] Furthermore, the water pipe is provided with a second bypass pipe 82, which is connected to the second steam inlet pipe 82. This arrangement facilitates water replenishment to the second scrubber from the second steam inlet pipe 82.

[0017] Furthermore, the water pipe is provided with a third bypass pipe 83, which is connected to the inlet of the circulation pump for replenishing water to the circulation pump.

[0018] Preferably, the collecting tank 3 is a water seal tank, and the water inlet pipe 31 of the water seal tank is connected to a water pipe.

[0019] Furthermore, a first spray water valve 71 is provided upstream of the first spray pipe, and a second spray water valve 72 is provided upstream of the second spray pipe. By providing the spray water valves, it is convenient to control the first scrubber and the second scrubber to spray intermittently without having to keep the spray water always on.

[0020] In practical applications, the water pipe is connected to the water source of the workshop, and the water in the water pipe is preferably hot water. The steam pipe is connected to the cyclone separator (not shown) of the hot pulping line.

[0021] The steam with a small amount of slurry separated by the cyclone separator enters the first scrubber and the second scrubber, and the water in the water pipe enters the first scrubber and the second scrubber for spraying. Among them, the first scrubber plays a major role in treatment, and the second scrubber plays an auxiliary role in treatment.

[0022] The steam discharged from the first gas phase outlet pipe 13 of the first scrubber can be further reused; the liquid water discharged from the first liquid phase outlet pipe of the first scrubber is circulated to the water point for recycling through the circulation pump, and the rest is sent back to the first scrubber; the waste discharged from the first sewage pipe of the first scrubber is sent to the collection tank. The steam discharged from the second gas phase outlet pipe of the second scrubber is discharged to the atmosphere, and the material discharged from the second liquid phase pipe of the second scrubber is sent to the collection tank. The waste collected in the collection tank is used for further centralized treatment.

[0023] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A steam recovery system for a hot pulping line, comprising a steam pipeline, characterized in that: It also includes a first scrubber, a water pipe, and a collecting tank; the first scrubber is provided with a first steam inlet connecting pipe, a first spray connecting pipe, a first gas phase outlet pipe, a first liquid phase outlet pipe, and a first sewage pipe; the steam pipe is connected to the first steam inlet connecting pipe; the water pipe is connected to the first spray connecting pipe; the first sewage pipe is connected to the collecting tank; the first liquid phase outlet pipe is provided with a circulating pump, the outlet pipe of the circulating pump is provided with a circulating pipe, and the circulating pipe is connected to the first steam inlet connecting pipe.

2. The steam recovery system for a hot pulping line according to claim 1, characterized in that: It also includes a second scrubber, which is provided with a second steam inlet connecting pipe, a second spray connecting pipe, a second gas phase outlet pipe, and a second liquid phase outlet pipe; the steam pipe is provided with a steam branch pipe, which is connected to the second steam inlet connecting pipe; the water pipe is provided with a first bypass pipe, which is connected to the second spray connecting pipe; the second liquid phase outlet pipe is connected to the collecting tank.

3. The steam recovery system for hot pulping line according to claim 2, characterized in that: The water pipe is provided with a second bypass pipe, and the second bypass pipe is connected to the second steam inlet pipe.

4. The steam recovery system for a hot pulping line according to claim 2 or 3, characterized in that: The collecting tank is a water seal tank, and a water inlet pipe of the water seal tank is connected to a water pipe.

5. The steam recovery system for a hot pulping line according to claim 2, characterized in that: A first spray water valve is arranged upstream of the first spray pipe, and a second spray water valve is arranged upstream of the second spray pipe.

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