CN202016964U

CN202016964U - Improved alkali liquor preparation control device

Info

Publication number: CN202016964U
Application number: CN2011200939670U
Authority: CN
Inventors: 李康; 桂炜; 何华盛; 朱寅明; 邓逸华
Original assignee: JIANGXI TAIDE ENGINEERING Co Ltd
Current assignee: JIANGXI TAIDE ENGINEERING Co Ltd
Priority date: 2011-04-02
Filing date: 2011-04-02
Publication date: 2011-10-26
Anticipated expiration: 2021-04-02

Abstract

The utility model relates to an improved alkali liquor preparation control device, which is characterized in that concentrated alkali is respectively collected into inlets of two regulating valves, an outlet of one regulating valve is connected with an inlet of a static mixer, a density meter is arranged between an outlet of the static mixer and the regulating valve, an outlet of the other regulating valve is connected with an inlet of a circulating pump, in addition, a density meter is arranged between an outlet of a heat exchanger and the regulating valve, the two density meters are respectively connected with the corresponding regulating valve and a proportion integration differentiation (PID) regulator of a distribution control system (DCS) through signal wires, and a density regulating loop is generated. The control precision can be greatly improved through the fine adjustment on the density of dipping alkali liquor in a circulation pipeline.

Description

Improved alkali liquor preparing control device

Technical field

The utility model belongs to the technical field of chemical industry, relates to production process of viscose fiber material proportion control production equipment, particularly improved steeping lye density control device.

Background technology

The allotment of steeping lye is an important step in the production process of viscose fiber.Existing steeping lye allotment control device, as shown in Figure 1, soft water and concentrated base insert static mixer 2 by variable valve 3 respectively, static mixer 2 connects dipping alkali make-up tank 1, dipping alkali make-up tank 1 is equipped with LT-01 fluid level transmitter 8, and insert and on the PID of DCS system controller 5, form the PID regulating loop between the soft variable valve 3, the outlet of dipping alkali make-up tank 1 connects recycle pump 6, recycle pump 6 connects the inlet of dipping alkali make-up tank 1 by interchanger 7, interchanger 7 to the passage of dipping alkali make-up tank 1 is connected to DT-01 densometer 4, liquid level control soft water variable valve 3 by dipping alkali make-up tank 1 is stablized its liquid level, and the control of dipping alkali density D T-01 densometer 4 is variable valve 3 of regulating concentrated base.As seen, the density of steeping fluid make-up tank reaches density stabilized by the variable valve equipment of PID setter control concentrated base in the present control device on DCS, but because the soft water fluctuations in discharge fluctuation that property time lag of material transmission and steeping lye make-up tank liquid level are regulated, make and lack of proper care through the proportioning of soft water behind the static mixer and concentrated base, can cause density inaccurate, thereby the density error that detects on circulating line is just bigger than normal, the density of the steeping lye of Jian Ceing reaction simultaneously is untimely, so the density measurement of actual steeping lye is just inaccurate, and then has a strong impact on materials quality.

The utility model content

The purpose of this utility model is that the problem at prior art exists improves the density accuracy of steeping lye allotment, and then improves materials quality.

The utility model is achieved through the following technical solutions above-mentioned purpose, improved alkali liquor preparing control device, soft water inserts the inlet of static mixer by variable valve, the outlet of static mixer connects dipping alkali make-up tank, dipping alkali make-up tank is equipped with fluid level transmitter, fluid level transmitter by the PID of DCS system setter with connect the soft variable valve and be connected, the outlet of dipping alkali make-up tank connects recycle pump, recycle pump connects the inlet of dipping alkali make-up tank by interchanger, it is characterized in that, concentrated base inserts the inlet of two variable valve respectively, wherein the outlet of a variable valve connects the inlet of static mixer, static mixer is equipped with densometer, this densometer with the junction of dipping alkali make-up tank, be docile and obedient connection by signal wire between the PID of DCS system setter and the variable valve; The outlet of another variable valve connects the inlet of recycle pump, and in interchanger and the junction of flooding the alkali make-up tank densometer is installed, and is docile and obedient connection by signal wire between this densometer, the PID of DCS system setter and the variable valve.

The beneficial effects of the utility model are, control a variable valve that enters the static mixer concentrated base by the densometer that the outlet of static mixer is installed, can carry out coarse adjustment to density, increase simultaneously by a variable valve pipeline again, incorporate pump entry into, come regulating and controlling by the heat exchanger outlet densometer, thereby can further finely tune, can significantly improve control accuracy like this steeping lye density.

Description of drawings

Fig. 1 is the structural representation of existing alkali liquor preparing control device.

Fig. 2 is a structural representation of the present utility model.

Among the figure: 1. flood alkali make-up tank, 2. static mixer, 3. variable valve, 4. densometer, the 5. PID of DCS system setter, 6. recycle pump, 7. interchanger, 8. fluid level transmitter.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.Referring to Fig. 2, improved alkali liquor preparing control device, soft water inserts the inlet of static mixer 2 by variable valve 3, the outlet of static mixer 2 connects dipping alkali make-up tank 1, dipping alkali make-up tank 1 is equipped with LT fluid level transmitter 8, LT fluid level transmitter 8 by the PID of DCS system setter 5 with connect soft variable valve 3 and be connected, and with connect the soft variable valve and form the liquid level regulating loop by the PID of DCS system setter; The outlet of dipping alkali make-up tank 1 connects recycle pump 6, recycle pump 6 connects the inlet of dipping alkali make-up tank 1 by interchanger 7, it is characterized in that, concentrated base inserts the inlet of two variable valve 3 respectively, wherein the outlet of a variable valve 3 connects the inlet of static mixer 2, static mixer 2 is equipped with densometer 4 with the junction of dipping alkali make-up tank 1, is docile and obedient connection by signal wire between this densometer 4, the PID of DCS system setter 5 and the variable valve 3, and forms the Auto-regulating System of Density of Heavy Medium loop; The outlet of another variable valve 3 connects the inlet of recycle pump 6, and densometer 4 is installed in interchanger 7 and the junction of flooding alkali make-up tank 1, be docile and obedient connection by signal wire between this densometer 4, the PID of DCS system setter 5 and the variable valve 3, and form another Auto-regulating System of Density of Heavy Medium loop.

The utility model is on existing steeping lye allotment control device basis, after improving, concentrated base is inserted two variable valve 3 respectively, the outlet of one of them variable valve 3 connects the inlet of static mixer 2, a densometer 4 and the PID of DCS system setter 5 are housed between the outlet of variable valve 3 and static mixer 2, and densometer 4 is connected by signal wire and the PID of DCS system setter 5 and a variable valve 3 connecing concentrated base; The outlet of another variable valve 3 connects the inlet of recycle pump 6, and this variable valve 3 also is equipped with a densometer 4 and the PID of DCS system setter 5 with the outlet of interchanger 7, and densometer 4 is connected by signal wire and the PID of DCS system setter 5 and another variable valve 3 of connecing concentrated base.By two variable valve 3 and combining of densometer 4 and the PID of DCS system setter 5 monitor with mixing system in steeping lye, thereby improve the density accuracy of steeping lye allotment, improve materials quality.

Claims

1. improved alkali liquor preparing control device, soft water inserts the inlet of static mixer [2] by variable valve [3], the outlet of static mixer [2] connects dipping alkali make-up tank [1], dipping alkali make-up tank [1] is equipped with fluid level transmitter [8], fluid level transmitter [8] by the PID of DCS system setter [5] with connect soft variable valve [3] and be connected, the outlet of dipping alkali make-up tank [1] connects recycle pump [6], recycle pump [6] connects the inlet of dipping alkali make-up tank [1] by interchanger [7], it is characterized in that, concentrated base inserts the inlet of two variable valve [3] respectively, wherein the outlet of a variable valve [3] connects the inlet of static mixer [2], static mixer [2] is equipped with densometer [4], this densometer [4] with the junction of dipping alkali make-up tank [1], be docile and obedient connection by signal wire between the PID of DCS system setter [5] and the variable valve [3]; The outlet of another variable valve [3] connects the inlet of recycle pump [6], and in interchanger [7] and the junction of flooding alkali make-up tank [1] densometer [4] is installed, is docile and obedient connection by signal wire between this densometer [4], the PID of DCS system setter [5] and the variable valve [3].