Vertical boiling pot for paper pulp

Abstract

The vertical paper pulp boiling pot has steam heating pipe with steam inlet on its one end and steam pores on its wall. By means of the steam heating pipe and the circular heating, the paper pulp boiling pot has homogeneous pulping, raised boiling speed, raised straw pulp quality and yield. The prepared straw pulp may be used to replace wood pulp, and hw light color, high whiteness, low hardness, high strength and other advantages. In addition, the black liquor may be reused to reduce drainage and save water.

Description

technical field

[0001] The invention relates to a cooking equipment in a pulp manufacturing process, in particular to a pulp vertical cooking pot with built-in microporous steam pipes. Background technique

[0002] How to use non-forest fiber raw materials, develop a suitable pulping process route and equipment, change the current situation that non-forest fiber raw materials can only produce medium and low-grade pulp, and reduce the amount and difficulty of waste liquid treatment. One of the major issues facing.

[0003] In the prior art, fiber raw materials such as wheat straw (grasses) and alkaline or sulfate cooking liquid are added together in a vertical cooking pot, steam is introduced, the temperature is raised, the gas is slightly deflated, the temperature is raised again, and heat preservation is carried out for degassing. Lignin reacts to make wheat straw (grass) pulp. Those skilled in the art are familiar with the characteristics of grass pulping: shorter fibers...

Examples

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

[0023] figure 2 , image 3 Shown is the structural representation of novel vertical cooking pot of the present invention. The vertical cooking pot includes: a pot body 1, a heater 6, and a circulation heating pump 11. The pot body is provided with a steam heating pipe 5, which can be one (as shown in the figure), and is a plurality of parallel straight pipes or spiral coils (such as image 3 Shown) or U-shaped pipe, the steam heating pipe 5 is connected to the air inlet 10 on the pot body, the air inlet 10 can be located on the upper or lower part of the pot body, and the upper cone of the pot body has a filter function The upper filter plate 3, there is a liquid suction middle filter plate 2 in the middle of the pot body, the upper end of the pot body is provided with a feed port 4, an upper circula...

technical field

[0001] The invention relates to a cooking equipment in a pulp manufacturing process, in particular to a pulp vertical cooking pot with built-in microporous steam pipes. Background technique

[0002] How to use non-forest fiber raw materials, develop a suitable pulping process route and equipment, change the current situation that non-forest fiber raw materials can only produce medium and low-grade pulp, and reduce the amount and difficulty of waste liquid treatment. One of the major issues facing.

[0003] In the prior art, fiber raw materials such as wheat straw (grasses) and alkaline or sulfate cooking liquid are added together in a vertical cooking pot, steam is introduced, the temperature is raised, the gas is slightly deflated, the temperature is raised again, and heat preservation is carried out for degassing. Lignin reacts to make wheat straw (grass) pulp. Those skilled in the art are familiar with the characteristics of grass pulping: shorter fibers...

Examples

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

[0023] figure 2 , image 3 Shown is the structural representation of novel vertical cooking pot of the present invention. The vertical cooking pot includes: a pot body 1, a heater 6, and a circulation heating pump 11. The pot body is provided with a steam heating pipe 5, which can be one (as shown in the figure), and is a plurality of parallel straight pipes or spiral coils (such as image 3 Shown) or U-shaped pipe, the steam heating pipe 5 is connected to the air inlet 10 on the pot body, the air inlet 10 can be located on the upper or lower part of the pot body, and the upper cone of the pot body has a filter function The upper filter plate 3, there is a liquid suction middle filter plate 2 in the middle of the pot body, the upper end of the pot body is provided with a feed port 4, an upper circula...

Images