Pretreatment device for camphorwood pulping

Abstract

A pretreatment device for camphorwood pulping comprises a steamer (1) used for heating camphorwood chips so that camphor oil can be separated from the camphorwood chips, a release bin (2) with a feeding port communicated with a discharging port of the steamer (1) and a condenser (3) with a feeding port communicated with an exhaust port of the release bin (2). A liquid inlet of the coalescer (4) is communicated with a condensate outlet of the condenser (3), and a liquid inlet of the oil collecting tank (5) is communicated with an oil outlet of the coalescer (4). According to the technical scheme provided by the utility model, camphor and camphor wood oil in camphorwood chips can be effectively extracted, and the problems that camphorwood pulping wastewater restricts biochemical treatment, camphorwood pulp obstructs resin production in papermaking and the like are solved. Meanwhile, camphor oil can be obtained, and economic benefits are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulping and papermaking, in particular to a pretreatment device for camphor wood pulping. Background Art

[0002] Pulping is the process of separating plant materials into fibers to obtain pulp. Pulping methods can be divided into mechanical method, chemical method and chemical mechanical method, which produce mechanical pulp, chemical pulp and chemical mechanical pulp respectively.

[0003] Wood fiber is an important raw material for pulping and is also a high-quality raw material. Camphor wood is an evergreen tree with a fragrant aroma. Its bark is yellow-brown with irregular longitudinal cracks. It is widely distributed in China, Vietnam, Japan and North Korea. In China, it is mainly distributed in Jiangxi, Hunan, Hubei, Fujian, Guangdong and Zhejiang, south of the Yangtze River.

[0004] At present, camphor wood is mainly used as a building and furniture material. Another use of camphor wood is to extract camphor and camphor oil. When the camphor oil in the camphor wood chips enters the wastewater system during the pulping process, the growth of fungi in the wastewater biochemical treatment process is hindered, and the biochemical activity is reduced, which will restrict the biochemical treatment of pulping wastewater. On the other hand, camphor oil adheres to the pulp and will produce resin barriers during the papermaking process. Therefore, it is difficult to produce high-quality camphor wood pulp using traditional pulping methods.

[0005] If a method can be developed to effectively remove camphor oil from camphor wood chips and realize large-scale production of camphor wood pulp, it will greatly promote the comprehensive utilization of camphor wood resources and the development of pulping technology. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a pretreatment device for camphor wood pulping, which can effectively extract camphor and camphor oil from camphor wood chips, avoid the problems of camphor wood pulping wastewater restricting biochemical treatment, and camphor wood pulp causing resin obstacles to papermaking.

[0007] In order to solve the above technical problems, the utility model provides a pretreatment device for camphor wood pulping, including a steamer for heating camphor wood chips to separate camphor oil from the camphor wood chips, a release bin whose feed inlet is connected to the discharge port of the steamer, a condenser whose feed inlet is connected to the exhaust port of the release bin, a coalescer whose liquid inlet is connected to the condensate outlet of the condenser, and an oil collection tank whose liquid inlet is connected to the oil outlet of the coalescer.

[0008] As one embodiment thereof, the pretreatment device for camphor wood pulping provided by the utility model also has a gas-liquid separator connected to the condensate outlet of the condenser, and a vacuum pump connected to the gas-liquid separator; the discharge port of the gas-liquid separator is connected to the liquid inlet of the agglomerator.

[0009] As one of the embodiments, the pretreatment device for camphor wood pulping provided by the present utility model is provided with a plurality of filter pipes at the top of the release bin, which can prevent camphor wood chips from passing through, but allow camphor oil-containing gas to pass through.

[0010] The technical solution provided by the present utility model can effectively extract camphor and camphor oil from camphor wood chips, avoid problems such as camphor wood pulping wastewater restricting biochemical treatment and camphor wood pulp causing resin obstacles to papermaking. At the same time, camphor oil can be obtained, further improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings are used to provide a further understanding of the present utility model, and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. In the drawings:

[0012] Figure 1 It is a structural diagram of the pretreatment device for camphor wood pulping in the embodiment. EMBODIMENTS

[0013] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.

[0014] As Figure 1 shown, the pretreatment device for camphor wood pulping includes a steam evaporator 1 that heats camphor wood chips to separate camphor oil from the camphor wood chips, a release bin 2 with a feed port communicating with the discharge port of the steam evaporator 1, a condenser 3 with a feed port communicating with the exhaust port of the release bin 2, a coalescer 4 with a liquid inlet communicating with the condensate outlet of the condenser 3, and an oil storage tank 5 with a liquid inlet communicating with the oil outlet of the coalescer 4. Specifically, in the embodiment, the steam evaporator 1 is a spiral steam evaporator. After the camphor wood chips enter from the feed port, the spiral arranged in the steam evaporator 1 pushes the camphor wood chips towards the discharge port and finally discharges from the discharge port. A plurality of steam inlets are adopted to introduce steam into the steam evaporator 1. Inside the steam evaporator 1, the temperature of the camphor wood chips gradually rises and finally exceeds the camphor sublimation temperature. The steam added into the steam evaporator 1 condenses to produce condensate water, and part of the water can also be added to the camphor wood chips to perform hot extraction treatment on the camphor wood chips in the steam evaporator 1. The steam evaporator 1 can be horizontally arranged or inclinedly arranged.

[0015] Working principle: The sublimation temperature of camphor is about 60~70℃. Camphor wood is cut into wood chips by a chipper. Camphor wood chips are heated and extracted by steam in a steamer 1, so that the temperature of the camphor wood chips after heating and extraction is higher than the sublimation temperature of camphor. Camphor is gradually extracted. The camphor wood chips and the extracted camphor after steaming in the steamer 1 enter the release bin 2. In the mixed material in the release bin 2, camphor and water vapor enter the condenser 3. After condensation in the condenser 3, camphor oil and condensed water are formed. Camphor oil and condensed water are separated by standing in a coalescer 4. The separated camphor oil enters the oil collecting tank 5, and the water enters the sewage system. After the camphor wood chips are cooked, the content of camphor and camphor oil has been greatly reduced. After achieving the purpose of pretreatment, they are sent to the pulping process for pulping.

[0016] The technical solution provided by the utility model can effectively extract camphor and camphor oil from camphor wood chips by using a steamer 1 to heat camphor wood chips to volatilize camphor from the wood chips, and then recover camphor oil through condensation and static separation, thereby avoiding problems such as camphor pulping wastewater restricting biochemical treatment and camphor pulp causing resin obstacles to papermaking. At the same time, camphor oil can be obtained, further improving economic benefits.

[0017] like Figure 1 As shown, as one of the embodiments, based on the above basic scheme, the pretreatment device for camphor wood pulping provided by the utility model further comprises a gas-liquid separator 6 connected to the condensate outlet of the condenser 3, and a vacuum pump 7 connected to the gas-liquid separator 6; the liquid discharge port of the gas-liquid separator 6 is connected to the liquid inlet of the coalescer 4. Adding a vacuum system can make the camphor and camphor oil in the wood chips in the release bin 2 more volatile.

[0018] like Figure 1 As shown, as one of the embodiments, based on the above basic scheme, the present utility model provides a pretreatment device for camphor wood pulping, wherein the top of the release bin 2 is provided with a plurality of filter tubes 8 that can prevent camphor wood chips from passing through, but allow camphor oil-containing gas to pass through. Specifically, a plurality of air holes are provided on the tube wall of the filter tube 8. The filter tube 8 can prevent camphor wood chips from entering the condenser 3 and subsequent processes, and avoid blockage and the like in the subsequent processes during the production process.

[0019] The above description is only the preferred embodiment of the utility model, and does not limit the utility model in any way. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pretreatment device for camphor wood pulping, characterized in that: The invention comprises a steamer (1) for heating camphor wood chips so that camphor oil can be separated from the camphor wood chips, a release bin (2) whose feed inlet is connected to a feed outlet of the steamer (1), a condenser (3) whose feed inlet is connected to an exhaust port of the release bin (2), a coalescer (4) whose liquid inlet is connected to a condensate outlet of the condenser (3), and an oil collecting tank (5) whose liquid inlet is connected to an oil outlet of the coalescer (4).

2. The pretreatment device for camphor wood pulping according to claim 1, characterized in that: It also comprises a gas-liquid separator (6) connected to the condensate outlet of the condenser (3), and a vacuum pump (7) connected to the gas-liquid separator (6); the liquid discharge port of the gas-liquid separator (6) is connected to the liquid inlet of the coalescer (4).

3. The pretreatment device for camphor wood pulping according to claim 1, characterized in that: A plurality of filter tubes (8) are provided on the top of the release chamber (2) and are capable of preventing camphor wood chips from passing through but allowing the camphor oil-containing gas to pass through.

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