Reaction kettle heating device capable of controlling temperature

Abstract

The utility model relates to a reaction kettle heating device capable of controlling temperature, which is characterized in that a stirrer is arranged in a reaction kettle, a steam main pipe is connected onto the reaction kettle, a manual stop valve and a flow meter are arranged on the steam main pipe, a first switch valve and a first regulating valve are sequentially connected onto the steam main pipe in series, and a steam coil pipe is connected with the bottom end of the steam main pipe. The steam coil pipe is arranged at the middle lower part in the reaction kettle; the steam header pipe is connected with a branch pipe, the branch pipe is provided with a second switch valve, the bottom end of the branch pipe is connected with an aeration disc, and the aeration disc is arranged at the bottom in the reaction kettle; and a temperature sensor is arranged on one side of the lower part of the reaction kettle. The advantages of direct heating and indirect heating of steam are combined, the temperature of materials in the reaction kettle is detected through the temperature sensor, the use amount of the steam can be controlled through the multiple switch valves and the multiple adjusting valves, and therefore the purpose of multi-section speed and timing temperature rising can be achieved.

Description

Technical Field

[0001] The utility model relates to a reaction kettle steam heating device, in particular to a reaction kettle heating device for controlling temperature. Background Art

[0002] In the chemical, metallurgical, and new energy industries, steam is often needed to heat the reactor. There are two main types of traditional reactor steam heating devices. The first type is direct steam heating, which directly passes steam into the material. It has the advantage of fast heating speed, but the disadvantage is that it will bring more condensed water to the material during the heating process, affecting the concentration of the material. At the same time, after the heating is stopped, it is easy to produce material backflow and corrode the steam pipe; the second type is indirect heating, which uses jackets, coils, etc. to heat the materials in the reactor. The advantage is that the materials will not be contaminated during the heating process, but the disadvantage is that the temperature rises slowly. In addition, most of the existing steam heating devices can only control the target temperature, but cannot control the heating time, which will cause instability in product batches. Utility Model Content

[0003] The purpose of the utility model is to provide a temperature-controlled reactor heating device in order to solve the above-mentioned problem.

[0004] The utility model achieves the above-mentioned purpose through the following technical scheme: a temperature-controlled reactor heating device comprises a reactor, characterized in that: an agitator is arranged in the reactor, the reactor is connected to a steam main pipe, a manual stop valve and a flow meter are arranged on the steam main pipe, a first switch valve and a first regulating valve are sequentially connected in series on the steam main pipe, the bottom end of the steam main pipe is connected to a steam coil, the steam coil is arranged in the middle and lower part of the reactor, the end of the steam coil extends out of the reactor, and the end of the steam coil is connected to a steam trap group; the steam main pipe is connected to a branch pipe, a second switch valve is arranged on the branch pipe, the bottom end of the branch pipe is connected to an aeration plate, and the aeration plate is arranged at the bottom of the reactor; a liquid level meter is arranged on the top of the reactor, and a temperature sensor is arranged on one side of the lower part.

[0005] The two ends of the first regulating valve are connected in parallel with a second regulating valve, and the regulating range of the first regulating valve is greater than the flow regulating range of the second regulating valve.

[0006] The branch pipe is connected to a bypass pipe, the bypass pipe is connected to the reaction kettle, and a third switch valve is arranged on the bypass pipe.

[0007] The first switch valve, the second switch valve and the third switch valve are all pneumatic regulating valves with valve position feedback function; the liquid level meter is a radar liquid level meter, and the flow meter is an integrated differential pressure flow meter with temperature and pressure compensation.

[0008] The first regulating valve and the second regulating valve are both pneumatic regulating valves with valve position feedback function.

[0009] The beneficial effects of the utility model are as follows: combining the advantages of direct steam heating and indirect steam heating, detecting the temperature of the material in the reactor by a temperature sensor, integrating the used steam by a steam flow meter, obtaining the instantaneous flow of steam corresponding to the heating time by conventional calculation, controlling the amount of steam used by a plurality of switch valves and a plurality of regulating valves, thereby achieving the purpose of multi-stage speed and timed heating, with a high degree of automation, high heating efficiency, stable heating process, good reproducibility of the heating process between batches, and saving manpower and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the utility model;

[0011] In the figure: 1-reactor, 2-agitator, 3-steam coil, 4-aeration plate, 5-temperature sensor, 6-level meter, 7-flow meter, L-steam main pipe, L1-branch pipe, A-manual stop valve, B-trap group, F1-first switch valve, F2-second switch valve, F3-third switch valve, K1-first regulating valve, K2-second regulating valve. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings:

[0013] like Figure 1 As shown, a temperature-controlled reactor heating device includes a reactor 1, characterized in that: an agitator 2 is provided in the reactor 1, the reactor 1 is connected to a steam main pipe L, a manual stop valve A and a flow meter 7 are provided on the steam main pipe L, a first switch valve F1 and a first regulating valve K1 are connected in series in sequence to the steam main pipe L, the bottom end of the steam main pipe L is connected to a steam coil 3, the steam coil 3 is arranged in the middle and lower part of the reactor 1, the end of the steam coil 3 extends out of the reactor 1, and the end of the steam coil 3 is connected to a steam trap group B; the steam main pipe L is connected to a branch pipe L1, a second switch valve F2 is provided on the branch pipe L1, the bottom end of the branch pipe L1 is connected to an aeration plate 4, and the aeration plate 4 is arranged at the bottom of the reactor 1; a liquid level meter 6 is provided on the top of the reactor 1, and a temperature sensor 5 is provided on one side of the lower part.

[0014] The second regulating valve K2 is connected in parallel to both ends of the first regulating valve K1 , and the regulating range of the first regulating valve K1 is greater than the flow regulating range of the second regulating valve K2 .

[0015] The branch pipe L1 is connected to a bypass pipe, the bypass pipe is connected to the reactor 1, and a third switch valve F3 is arranged on the bypass pipe.

[0016] The first switch valve F1, the second switch valve F2, the third switch valve F3, the first regulating valve K1 and the second regulating valve K2 are all pneumatic regulating valves with valve position feedback function; the liquid level meter 6 is a radar liquid level meter, and the flow meter 7 is an integrated differential pressure flow meter with temperature and pressure compensation.

[0017] Working process: The utility model is controlled by the DCS system. When the system is started, the direct steam flow, indirect heating time, insulation time and target temperature are set on the DCS system.

[0018] After the system is initialized, the liquid level of the reactor 1 is detected by the liquid level meter 6 and transmitted to the DCS system. The initial temperature of the reactor 1 is detected by the temperature sensor 5 and transmitted to the DCS system. The system calculates the required total steam flow rate through the liquid level value, initial temperature value, steam pressure and temperature value.

[0019] The first stage is the direct steam stage. Close the first switch valve F1 and the third switch valve F3, open the second switch valve F2 to start direct steam heating. When the accumulated flow of the steam flow meter is greater than or equal to the set direct steam flow, close the second switch valve F2 and open the third switch valve F3 to balance the air pressure and prevent the material from being sucked back into the direct steam pipeline.

[0020] The second stage is the indirect heating stage. The system calculates the total steam flow required for this stage, divides it by the indirect heating time to get the target instantaneous flow value for this stage, opens the first switch valve F1, the first regulating valve K1 and the second regulating valve K2, closes the second switch valve F2 and the third switch valve F3, and starts indirect heating. The DCS controls the opening of the first regulating valve K1 and the second regulating valve K2 so that the instantaneous steam flow measured by the steam flowmeter 7 follows the target instantaneous flow value calculated above to ensure that the heating process is completed within the set time.

[0021] The third stage is the heat preservation process. When the temperature of the material in the reactor 1 measured by the temperature sensor 5 is greater than or equal to the aforementioned target temperature, the system enters the heat preservation stage. The first regulating valve K1 is closed, and the second regulating valve K2 automatically adjusts the valve opening value according to the temperature measured by the temperature sensor 5 to ensure that the temperature of the material in the reactor 1 is stable at the aforementioned target temperature.

[0022] The DCS system has liquid level alarm and interlocking functions. For the reactor 1, when the indication of the liquid level meter 6 exceeds the upper limit of the liquid level, the system will issue an alarm; when the liquid level is lower than the lower limit, the system will not allow the agitator motor to be turned on and steam direct heating will not be allowed.

[0023] The DCS system has a hardware fault alarm function. When temperature or liquid level fails, the system automatically alarms.

[0024] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A temperature-controlled reactor heating device, comprising a reactor (1), characterized in that: The reactor (1) is provided with an agitator (2). The reactor (1) is connected to a steam main pipe (L). The steam main pipe (L) is provided with a manual stop valve (A) and a flow meter (7). The steam main pipe (L) is also connected in series with a first switch valve (F1) and a first regulating valve (K1). The bottom end of the steam main pipe (L) is connected to a steam coil (3). The steam coil (3) is arranged at the middle and lower part of the reactor (1). The end of the steam coil (3) extends out of the reactor (1). The end of the steam coil (3) is connected to a steam trap group (B). The steam main pipe (L) is connected to a branch pipe (L1). The branch pipe (L1) is provided with a second switch valve (F2). The bottom end of the branch pipe (L1) is connected to an aeration plate (4). The aeration plate (4) is arranged at the bottom of the reactor (1). A liquid level meter (6) is provided at the top of the reactor (1), and a temperature sensor (5) is provided at one side of the lower part.

2. A temperature-controlled reactor heating device as claimed in claim 1, characterized in that: The two ends of the first regulating valve (K1) are connected in parallel with a second regulating valve (K2), and the regulating range of the first regulating valve (K1) is greater than the flow regulating range of the second regulating valve (K2).

3. A temperature-controlled reactor heating device as claimed in claim 1, characterized in that: The branch pipe (L1) is connected to a bypass pipe, the bypass pipe is connected to the reaction kettle (1), and a third switch valve (F3) is provided on the bypass pipe.

4. A temperature-controlled reactor heating device as claimed in claim 1, characterized in that: The first switch valve (F1) and the second switch valve (F2) Both are pneumatic regulating valves with a valve position feedback function; the liquid level meter (6) is a radar liquid level meter, and the flow meter (7) is an integrated differential pressure flow meter with temperature and pressure compensation.

5. A temperature-controlled reactor heating device as claimed in claim 2, characterized in that: The first regulating valve (K1) and the second regulating valve (K2) are both pneumatic regulating valves with a valve position feedback function.

6. A temperature-controlled reactor heating device as claimed in claim 3, characterized in that: The third switch valve (F3) is a pneumatic regulating valve with a valve position feedback function.

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