CN215667146U - Hydrogen chloride synthetic furnace interlocking protection system - Google Patents
Hydrogen chloride synthetic furnace interlocking protection system Download PDFInfo
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- CN215667146U CN215667146U CN201922394913.7U CN201922394913U CN215667146U CN 215667146 U CN215667146 U CN 215667146U CN 201922394913 U CN201922394913 U CN 201922394913U CN 215667146 U CN215667146 U CN 215667146U
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- hydrogen
- chlorine
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims abstract description 39
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims abstract description 39
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000000460 chlorine Substances 0.000 claims abstract description 75
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 75
- 239000001257 hydrogen Substances 0.000 claims abstract description 74
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 74
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 71
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 58
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 58
- 230000001105 regulatory effect Effects 0.000 claims abstract description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses an interlocking protection system of a hydrogen chloride synthesis furnace, which comprises a hydrogen pressure transmitter and a No. 1 hydrogen orifice plate flowmeter F which are sequentially arranged on a hydrogen pipeline towards the synthesis furnaceH12# hydrogen gas orifice plate flowmeter FH2A hydrogen flow regulating valve, a hydrogen flow cut-off valve, a chlorine pressure transmitter and a No. 1 chlorine orifice flowmeter which are sequentially arranged on a chlorine pipeline towards the direction of the synthesis furnaceCl12# chlorine orifice flowmeter FCl2A chlorine flow regulating valve, a chlorine flow cut-off valve, a synthesizer hydrogen chloride pressure transmitter arranged on the synthesizer air outlet pipe, and a hydrogen chloride pressure transmitter changing2 flow regulating valves are arranged on the gas outlet pipeline of the synthesis furnace behind the transmitter. The system can monitor the over-chlorine or over-pressure of the hydrogen chloride synthetic furnace, and can effectively prevent the occurrence of the safety and environmental protection events.
Description
Technical Field
The utility model relates to the field of chlor-alkali production processes, in particular to an interlocking protection system of a hydrogen chloride synthesis furnace.
Background
In chlor-alkali production, the hydrogen chloride synthesis furnace plays an extremely important role as a starting device in the whole production, on one hand, chlorine and hydrogen generated in the electrolysis process are consumed, and on the other hand, qualified hydrogen chloride gas is provided for the downstream VCM synthesis process. Once the chlorine flow entering the synthesis furnace is larger than the hydrogen flow, the chlorine flow can react violently with acetylene gas in the VCM synthesis process at the downstream of the production chain, so that serious accidents such as explosion and even explosion of an explosion-proof membrane of a mixer in the VCM synthesis process are caused, and great potential safety production hazards are caused to the production of chlor-alkali; and when the pressure of the synthesis furnace rises, the explosion-proof membrane of the synthesis furnace is broken, and hydrogen chloride gas leaks out, thereby causing an environmental protection event. Therefore, ensuring safe and stable operation of the synthesis furnace is the key to the whole production of chlor-alkali. Aiming at the situation, the over-chlorine or over-pressure of the hydrogen chloride synthesis furnace is monitored by adding a sensor and an actuating mechanism to the hydrogen chloride synthesis furnace, and the interlocking of the synthesis furnace is correspondingly compiled according to the process requirements and the detection numerical values, so that the occurrence of the safety and environmental protection events can be effectively prevented.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an interlocking protection system of a hydrogen chloride synthesis furnace, which solves the defects of the prior art.
The utility model is realized by the following technical scheme:
an interlocking protection system of a hydrogen chloride synthetic furnace comprises a hydrogen pressure transmitter, a 1# hydrogen pore plate flowmeter FH1, a 2# hydrogen pore plate flowmeter FH2, a hydrogen flow regulating valve and a hydrogen flow cut-off valve which are sequentially arranged on a hydrogen pipeline towards the synthetic furnace, a chlorine pressure transmitter, a 1# chlorine pore plate flowmeter FCl1, a 2# chlorine pore plate flowmeter FCl2, a chlorine flow regulating valve and a chlorine flow cut-off valve which are sequentially arranged on a chlorine pipeline towards the synthetic furnace, a nitrogen charging valve arranged on a nitrogen pipeline arranged on the hydrogen pipeline between the hydrogen flow cut-off valve and the synthetic furnace, a synthetic furnace pressure transmitter arranged on a synthetic furnace outlet pipe, 2 flow regulating valves arranged on the synthetic furnace outlet pipe line behind the hydrogen chloride pressure transmitter, wherein one end of a first flow regulating valve is connected with the synthetic furnace outlet pipe, and the other end is connected with a Vinyl Chloride (VCM) synthetic device, one end of the other second flow regulating valve is connected with the gas outlet pipe of the synthesis furnace, and the other end of the other second flow regulating valve is connected with the acid absorber.
Furthermore, feedback transmitting units are additionally arranged on the hydrogen flow regulating valve, the hydrogen flow stop valve, the chlorine flow regulating valve and the chlorine flow stop valve.
Furthermore, each synthesis furnace is provided with a corresponding switching switch of the interlocking system.
The utility model has the following beneficial effects:
(1) the pressure of chlorine and hydrogen of the hydrogen chloride synthetic furnace is used as the determination condition of interlocking protection, and once the pressure of hydrogen is too low or the pressure of chlorine is too high, the hydrogen chloride synthetic furnace is interlocked and shut down, so that the synthetic furnace is prevented from being over-chlorinated.
(2) The chlorine regulating valve, the stop valve, the hydrogen regulating valve and the stop valve of the synthetic furnace are fed back, the actual running state of the valves is monitored, and once the opening of the regulating valve is smaller than a preset value or the stop valve is closed, the synthetic furnace is interlocked and stopped, so that the perchloric is prevented.
(3) 2 hydrogen flowmeters and 2 chlorine flowmeters are arranged on the synthesis furnace, and the optimal measurement value is selected for hydrogen and chlorine ratio calculation through DCS program judgment, so that the accuracy of the hydrogen and chlorine ratio is ensured.
(4) The hydrogen chloride pressure of the synthesis furnace is used as an interlocking protection judgment condition, once the pressure of the synthesis furnace is overhigh, the synthesis furnace is interlocked and shut down, and the environmental pollution caused by the rupture of an explosion-proof membrane of the hydrogen chloride synthesis furnace is prevented.
Drawings
FIG. 1 is a diagram of an interlocking protection system of a hydrogen chloride synthesis furnace.
In the figure: 1. hydrogen pressure transmitter, 2, chlorine pressure transmitter, 3, 1# hydrogen orifice plate flowmeter F H14, 2# hydrogen gas orifice plate flowmeter FH2Chlorine orifice meter No. 5, 1FCl1Chlorine orifice flowmeter No. 6, 2F Cl27, hydrogen flow regulating valve, 8, chlorine flow regulating valve, 9, hydrogen flow cut-off valve, 10, chlorine flow cut-off valve, 11, nitrogen charging valve, 12, hydrogen chloride pressure transmitter, 13, first flow regulating valve, 14, second flow regulating valve, 15 and synthetic furnace rupture disk.
Detailed Description
The present invention will be described in more detail with reference to examples. It should be understood that the description is only exemplary of the utility model and is not intended to limit the utility model, but rather that the utility model is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.
As shown in figure 1, the interlocking protection system of the hydrogen chloride synthesis furnace comprises a hydrogen pressure transmitter 1 and a No. 1 hydrogen orifice plate flowmeter F which are sequentially arranged on a hydrogen pipeline towards the synthesis furnace H13. 2# Hydrogen gas Orifice plate flowmeter F H24. A hydrogen flow regulating valve 7, a hydrogen flow cut-off valve 9, a chlorine pressure transmitter 2 and a No. 1 chlorine orifice flowmeter F which are sequentially arranged on the chlorine pipeline towards the synthesis furnace Cl15. 2# chlorine orifice flowmeter F Cl26. Chlorine flow regulating valve 8, chlorine flow trip valve 10 the nitrogen filling valve 11 of installation on the nitrogen gas pipeline that sets up on the hydrogen pipeline between hydrogen flow trip valve 9 and the synthetic furnace, installation synthetic furnace hydrogen chloride pressure transmitter 12 on the synthetic furnace outlet duct, install first flow regulating valve 13 and second flow regulating valve 14 on the synthetic furnace outlet duct line after hydrogen chloride pressure transmitter 12, the synthetic furnace outlet duct is connected to first flow regulating valve 13 one end, the VCM synthesizer is connected to the other end, the synthetic furnace outlet duct is connected to 14 one end of second flow regulating valve, the other end is connected the acid absorber.
The hydrogen pressure transmitter 1 and the chlorine pressure transmitter 2 are respectively arranged on a chlorine pipeline and a hydrogen pipeline of the synthesis furnace, the chlorine pressure and the hydrogen pressure of the hydrogen chloride synthesis furnace are used as interlocking protection judgment conditions, and once the hydrogen pressure is too low or the chlorine pressure is too high, the hydrogen chloride synthesis furnace is interlocked and shut down, so that the synthesis furnace is prevented from being over-chlorinated. The hydrogen chloride pressure of the synthesis furnace is used as an interlocking protection judgment condition through the hydrogen chloride pressure transmitter 12, once the pressure of the synthesis furnace is overhigh, the synthesis furnace is interlocked and stopped, and the environment pollution caused by the rupture of the explosion-proof membrane 15 of the hydrogen chloride synthesis furnace is prevented. 2 hydrogen gas (1# hydrogen gas orifice plate flowmeter F) are respectively arranged on the hydrogen gas line and the chlorine gas line of the hydrogen chloride synthesis furnace H13. 2# Hydrogen gas Orifice plate flowmeter FH24) And chlorine (No. 1 chlorine pore plate)Flow meter FCl1Chlorine orifice 5 and 2# flowmeter FCl26) The orifice flowmeter is used for connecting a flow measurement signal into the DCS, and when two measurement values are effective, the 1# hydrogen orifice flowmeter F is judged through the DCS program judgment H13 and 2# Hydrogen Orifice plate flowmeter F H24, judging the 1# chlorine orifice flowmeter F according to the optimal hydrogen flow valueCl1Chlorine orifice 5 and 2# flowmeter F Cl26, the optimal chlorine flow value is obtained, and the optimal hydrogen and chlorine measured values are selected to participate in the calculation of the proportion of the synthesis furnace, so that the accuracy of the hydrogen and chlorine proportion is ensured.
The procedure for determining and selecting the optimal hydrogen flow value and chlorine flow value is as follows:
cleaning the register stack (CAST), and applying the detection value of the No. 1 hydrogen/chlorine orifice flowmeter to the register M1 (F)H1＝M1/Fcl1M1), the detected value of the 2# hydrogen/chlorine orifice flowmeter is applied to the register M2 (F)H2＝M2/Fcl2M2), delaying for one second (WAIT 1S), subtracting M1 from the current 1# hydrogen/chlorine orifice meter measurement, taking the absolute value, and applying it to the register M3 (| F)H1-M1│＝M3 /│Fcl1-M1 ═ M3), M2 is subtracted from the current 2# hydrogen/chlorine orifice meter test value, and the absolute value is taken and paid to the register M3 (| F) andH2-M2│＝M4/│Fcl2m2 ═ M4), IF M3 is equal to or greater than M4, the hydrogen/chlorine flow rate value is the 2# hydrogen/chlorine orifice flowmeter test value (IF [ M3 ≧ M4)]、FH＝FH2/IF[M3≧M4]、Fcl＝Fcl2) Otherwise, the hydrogen flow value is the detected value of the No. 1 hydrogen/chlorine pore plate flowmeter (F)H＝FH1/FH＝Fcl1)。
In this example, feedback transmission means is added to the hydrogen flow rate adjustment valve 7, the hydrogen flow rate cut-off valve 9, the chlorine flow rate adjustment valve 8, and the chlorine flow rate cut-off valve 10. And (5) connecting the signal into the DCS and performing acousto-optic alarm configuration. The interlocking system switching switches are arranged on each synthesis furnace, and before the synthesis furnace is ignited, the load is lifted, and hydrogen is produced from water or recovered and mixed gas is generated, the interlocking switches are switched off, and the interlocking is switched on after the synthesis furnace operates stably, so that the safe and stable operation of the hydrogen chloride synthesis furnace in various states is effectively ensured.
In this case, there is one of the following conditions, the furnace is stopped in interlocking with the synthesis furnace:
(1) the soft interlocking switch is put into operation, and the pressure of hydrogen in front of the synthetic furnace is less than or equal to 55 KPa;
(2) the soft interlocking switch is put into operation, and the opening of the chlorine flow regulating valve of the synthesis furnace is less than or equal to 3 percent;
(3) the soft interlocking switch is put into operation, and the opening of the hydrogen flow regulating valve of the synthesis furnace is less than or equal to 3 percent;
(4) the soft interlocking switch is switched on, and the chlorine shut-off valve of the synthetic furnace is closed;
(5) the soft interlocking switch is switched on, and the hydrogen shut-off valve of the synthesis furnace is closed;
(6) the soft interlocking switch is put into operation, the rising rate of the pressure of hydrogen in front of the synthetic furnace is more than 0.1KPa/S, the chlorine-hydrogen ratio is lower than 1.05, and the two occur simultaneously and delay time is 5 seconds;
(7) the soft interlocking switch is put into operation, the rising rate of the pressure of the chlorine in front of the synthetic furnace is more than 0.1KPa/S, the chlorine-hydrogen ratio is lower than 1.05, and the chlorine and the hydrogen are generated simultaneously and delayed for 5 seconds;
(8) the soft interlocking switch is put into operation, the pressure drop rate of chlorine gas in front of the synthetic furnace is more than 0.1KPa/S, the hydrogen-chlorine ratio is lower than 1.05, and the chlorine gas and the hydrogen-chlorine are generated simultaneously and delayed for 5 seconds;
(9) the soft interlocking switch is put into operation, and the pressure of the hydrogen chloride outlet of the synthesis furnace is more than or equal to 70 KPa;
(10) the soft interlocking switch is put into operation, and the pressure of chlorine in front of the synthetic furnace is more than or equal to 120 KPa.
After a manual shutdown instruction of the hydrogen chloride synthesis furnace is sent out, the hydrogen chloride synthesis furnace interlocking protection system sequentially executes the following actions:
s1, closing the chlorine regulating valve 8 of the synthesis furnace;
s2, closing the chlorine shut-off valve 10 of the synthesis furnace;
s3, gradually closing the hydrogen regulating valve 7 of the synthesis furnace at the speed of 10%/S, and directly closing the hydrogen regulating valve when the opening degree of the hydrogen regulating valve is less than 20%;
s4, closing the hydrogen shut-off valve 9 of the synthesis furnace;
s5, gradually closing the first flow regulating valve 13 at the speed of 10%/S, cascading the second flow regulating valve 14, and setting the value to be 45 KPa;
and S6, opening the nitrogen filling valve 11 of the synthesis furnace.
Claims (3)
1. The interlocking protection system of the hydrogen chloride synthetic furnace is characterized by comprising a hydrogen pressure transmitter (1) and a No. 1 hydrogen orifice plate flowmeter F which are sequentially arranged on a hydrogen pipeline towards the direction of the synthetic furnaceH1(3) 2# hydrogen gas orifice plate flowmeter FH2(4) A hydrogen flow regulating valve (7), a hydrogen flow cut-off valve (9), a chlorine pressure transmitter (2) and a No. 1 chlorine orifice flowmeter which are sequentially arranged on the chlorine pipeline towards the direction of the synthesis furnaceCl1(5) 2# chlorine orifice flowmeter FCl2(6) Chlorine flow governing valve (8), chlorine flow trip valve (10) install on the nitrogen gas pipeline that sets up on the hydrogen gas pipeline between hydrogen flow trip valve (9) and the synthetic furnace and fill nitrogen valve (11), install synthetic furnace hydrogen chloride pressure transmitter (12) on the synthetic furnace outlet duct install first flow governing valve (13) and second flow governing valve (14) on the synthetic furnace outlet duct line after hydrogen chloride pressure transmitter (12), the synthetic furnace outlet duct is connected to first flow governing valve (13) one end, and chloroethylene (VCM) synthesizer is connected to the other end, synthetic furnace outlet duct is connected to second flow governing valve (14) one end, and acid absorber is connected to the other end.
2. The hydrogen chloride synthesis furnace interlock protection system according to claim 1, wherein a feedback transmission unit is added to the hydrogen flow regulating valve (7), the hydrogen flow cut-off valve (9), the chlorine flow regulating valve (8) and the chlorine flow cut-off valve (10).
3. The hydrogen chloride synthesis furnace interlocking protection system according to claim 1, wherein each synthesis furnace is provided with a corresponding on-off switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922394913.7U CN215667146U (en) | 2019-12-26 | 2019-12-26 | Hydrogen chloride synthetic furnace interlocking protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922394913.7U CN215667146U (en) | 2019-12-26 | 2019-12-26 | Hydrogen chloride synthetic furnace interlocking protection system |
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| Publication Number | Publication Date |
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| CN215667146U true CN215667146U (en) | 2022-01-28 |
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| CN201922394913.7U Expired - Fee Related CN215667146U (en) | 2019-12-26 | 2019-12-26 | Hydrogen chloride synthetic furnace interlocking protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893792A (en) * | 2022-05-24 | 2022-08-12 | 苏州金宏气体股份有限公司 | Remote ignition system and method for hydrogen bromide synthesis furnace |
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2019
- 2019-12-26 CN CN201922394913.7U patent/CN215667146U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893792A (en) * | 2022-05-24 | 2022-08-12 | 苏州金宏气体股份有限公司 | Remote ignition system and method for hydrogen bromide synthesis furnace |
| CN114893792B (en) * | 2022-05-24 | 2023-11-21 | 金宏气体股份有限公司 | Remote ignition system and method for hydrogen bromide synthesis furnace |
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Granted publication date: 20220128 |